A system for interrupting ignition is disclosed. Specific implementations of ignition interrupters may include a first conductive tab configured to couple to a spark plug; a second conductive tab configured to couple to a spark plug wire; a first tab holder coupled with the first conductive tab; a second tab holder coupled with the second conductive tab, where the second conductive tab overlaps with the first conductive tab; a sled positioned perpendicularly to a plane of the first conductive tab and the second conductive tab, the sled coupled between the first conductive tab and the second conductive tab; a first spring coupled to the sled; and a second spring coupled to the sled; where the sled may be configured to move to an open position in the gap between the first conductive tab and the second conductive tab, decompressing the first spring and the second spring.

A current cut-off device 1 includes a plate-shaped terminal piece 2 having a contact 21, a movable piece 4 including an elastic portion 44 formed in a plate shape so as to be elastically deformed and a movable contact 41 arranged at one end portion of the elastic portion 44 and having the movable contact 41 so as to be pressed against and in contact with the contact 21, and a thermally actuated element 5 which biases the movable piece 4 by deforming in accordance with a temperature change and causes a state of the movable piece 4 to be shifted from a conductive state in which the movable contact 41 is in contact with the contact 21 to a cut-off state in which the movable contact 41 is separated from the contact 21. When the state of the movable piece 4 is shifted from the conductive state to the cut-off state, as the movable contact 41 moves, it gets over the contact 21.

Implementations of a system for interrupting ignition may include a first spark plug terminal coupled with a first internal contact, the first internal contact extending into a housing; a second spark plug terminal coupled with a second internal contact, the second internal contact extending into the housing; a contactor biased against the first internal contact and the second internal contact; a plunger coupled with a solenoid coupled within the housing; a battery coupled with the solenoid; and a temperature sensor coupled with the battery and the solenoid.

A temperature-dependent switch which comprises a first and a second stationary counter contact and a temperature-dependent switching mechanism having a current transfer member. The switching mechanism, depending on its temperature, either closes the switch by pressing the current transfer member against the first and the second counter contact and thereby establishing an electrically conductive connection between the two counter contacts via the current transfer member, or opens the switch by keeping the current transfer member at a distance from the first and the second counter contact and thereby interrupting the electrically conductive connection. A closing lock is provided, which keeps the switch open when it has been opened for the first time. The closing lock comprises a spring washer which directly interacts with the current transfer member and mechanically locks the latter permanently when the switch has been opened for the first time so that the switch remains permanently open.

An electric circuit 100 includes a power line 13 to supply electric power from a power source 11 to a load 12, and a monitor line 14 electrically independent from the power line 13 to detect temperature of the heat source. The monitor line 14 has a breaker 1 connected thereon in series. The breaker 1 includes a fixed contact, a movable piece having a movable contact and pressing the movable contact so as to contact the fixed contact, and a thermally actuated element deforming with temperature changes to actuate the movable piece so that the movable contact is spaced apart from the fixed contact.

A temperature-dependent switch comprising first and second stationary contacts and a temperature-dependent switching mechanism having a movable contact member. The switching mechanism, in its first switching position, presses the contact member against the first contact and thereby produces an electrically conductive connection and, in its second switching position, keeps the contact member spaced apart from the first contact and thereby disconnects the electrically conductive connection. The switch further comprises a closing lock that, once activated, prevents the switch once having opened from closing again by keeping the switching mechanism in its second switching position. The closing lock comprises a locking element having a shape-memory alloy and is configured to change its shape upon exceeding a locking element switching temperature from a first shape, in which the locking element does not activate the closing lock, into a second shape, in which the locking element activates the closing lock.

A resetting element for transmitting resetting force to a thermal switch. The resetting element includes a first end and an elastic element configured to transmit a force received at the first end to the reset switch of the thermal switch, wherein the elastic element is prevents damage to the thermal switch by decreasing the force transmitted to the reset switch from the first end.

A temperature-dependent switch comprising first and second stationary contacts and a temperature-dependent switching mechanism having a movable contact member. The switching mechanism, in its first switching position, presses the contact member against the first contact and thereby produces an electrically conductive connection between the two contacts via the contact member and, in its second switching position, keeps the contact member spaced apart from the first contact and thereby disconnects the electrically conductive connection between the two contacts and opens the switch. The switch further comprises a closing lock that, as soon as it is activated, prevents the switch once having opened from closing again by keeping the switching mechanism in its second switching position. The closing lock comprises a locking element having a shape-memory alloy and an opening through which the movable contact member protrudes. The locking element is configured to change its shape upon exceeding a locking element switching temperature from a first shape, in which the locking element does not activate the closing lock, into a second shape, in which the locking element activates the closing lock by exerting a force on a part of the switching mechanism, which force holds the switching mechanism in its second switching position.

Electromechanical circuit breakers are disclosed herein. In some embodiments, the breakers can be integrated into battery management systems to simplify battery management circuitry and/or to provide redundancy to the battery management systems. In some embodiments, the breakers can be provided to reduce damage to the battery management systems during hot-swapping of a battery cell. The breakers can be automatically resettable or not automatically resettable in various embodiments.

A temperature-dependent switch comprises a first stationary contact, a second stationary contact, and a temperature-dependent switching mechanism having a movable contact member. In its first switching position, the switching mechanism presses the contact member against the first contact and thereby produces an electrically conductive connection between the two contacts. In its second switching position, the switching mechanism keeps the contact member spaced apart from the first contact. The temperature-dependent switching mechanism further comprises first and second temperature-dependent snap-action parts which switch from geometric low-temperature configurations to geometric high-temperature configurations when exceeding first and second switching temperatures, respectively, and switch back when subsequently falling below first and second reset temperatures, respectively. Switching the first and/or the second snap-action part from its geometric low-temperature configuration to its geometric high-temperature configuration brings the switching mechanism from its first switching position to its second switching position.