| 摘要 |
The cell (6) has a wall (63), a base (62) with a passage (66), and a cover (64) with an opening (67). A fastening bolt (37) extends through the opening up to the passage. A fastening unit (65) produces a pre-stress at the bolt. The fastening unit is attached at the bolt in such a manner that a force action is exerted from the fastening unit to the cover in a direction of a longitudinal axis of the bolt. The passage has an expansion sensor (61), which is compressed under force effect that is out-bound from the bolt. The wall has the expansion sensor that is expanded under the force effect. Independent claims are also included for the following: (1) a contact force measuring unit at a current collector (2) a method for measuring a contact force between a current collector and a current supply line using a contact force measuring unit. |
