| 摘要 |
The invention relates to an electrochemical storage device having a plurality of serially connected individual cells, each of the individual cells having two spatially separated electrodes, between which an electrolyte and an intermediate part ensuring the spacing of the electrodes is arranged. In the interior of the storage device, each individual cell has a protective element which is formed from a solid material having a nonlinear current/voltage characteristic curve, and which makes electrical contact with the positive and the negative electrode within the individual cell and provides a voltage-dependent electrical connection between said electrodes. The electrical resistance of the protective element above a critical voltage is smaller, and below the critical voltage larger, than the resistance present between the electrodes at the respective voltages without the protective element. To protect the individual cells against overcharging, the critical voltage is smaller than the decomposition voltage of the associated individual cell.
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