本发明涉及一种短路开关（1），特别是作为Schnellentladeeinheit的电池单元（10）的放电开关（32）（30），具有一个第一接触元件（2-1）和一个第二接触元件（2-2），其相对于彼此 被设计成可移动的，通过它的第一状态相互电绝缘，并且相互电接触的第二状态是可摄入，牺牲材料（3），其是在热的作用下热分解，加热元件（4），其与所述牺牲材料的热接触 （3），其中，所述牺牲材料（3）形成为在从未热分解状态转变为所述热分解状态时在所述第一和第二接触元件（2-1,2-2）之间形成电接触 ）由于它们相对于彼此的运动而引起或启用。

The present invention relates to a short-circuit switch (1), in particular as a discharge switch (32) of a Schnellentladeeinheit (30) of a battery cell (10), with a first contact element (2-1) and a second contact element (2-2), which relative to each other are designed to be movable, that through it a first state mutually electrically isolated and a second state in electrical contact with each other is ingestible, a sacrificial material (3) which is thermally decomposable under the action of heat, a heating element (4) which is in thermal contact with the sacrificial material is formed (3), wherein the sacrificial material (3) is formed so that it is in transition from a thermally undecomposed state to the thermally-decomposed state, forming an electrical contact between the first and the second contact element (2-1, 2-2 ) causes relative to each other by the movement or possible.