Battery in bipolar stacked configuration and method for the production thereof

A Ni/metal hydride battery of bipolar stack design, comprising:

• a plurality of subcells disposed in a gastight casing and pressed against each other, each subcell including:
• positive and negative electrodes,
• a separator disposed between the positive and negative electrodes, and
• electrolyte fixed in an amount in the electrodes and separator;
• an electrically conductive wall positioned between two adjacent subcells, the wall separating the electrolytes of the two adjacent subcells and electrically connecting the electrodes of the two adjacent subcells to one another;
• a common gas space;
• and
• two pressure plates functioning as current-discharge poles between which the subcells are disposed, wherein the subcells are permanently pressed against one another in an elastic manner, wherein the subcells form a stack having a central passage, and wherein the individual subcells are connected to the central passage by porous connecting elements.

A method for producing a battery, comprising:

• disposing a plurality of subcells in a gastight casing and pressing the subcells against each other, wherein each subcell has positive and negative electrodes and a separator disposed between the electrodes;
• impregnating each separator with a predetermined amount of electrolyte;
• disposing an electrically conductive wall between two adjacent subcells to separate the electrolytes of the two adjacent subcells and to provide an electrical connection between the electrodes of the two adjacent subcells;
• placing a common gas space in the center of the subcells so that the common gas space is in communication with the subcells;
• disposing the subcells between two pressure plates functioning as current-discharge poles;
• and
• filling the subcells with electrolyte before the subcells are assembled.

A method for producing a battery, comprising:

• disposing a plurality of subcells in a gastight casing and pressing the subcells against each other, wherein each subcell has positive and negative electrodes and a separator disposed between the electrodes;
• impregnating each separator with a predetermined amount of electrolyte;
• disposing an electrically conductive wall between two adjacent subcells to separate the electrolytes of the two adjacent subcells and to provide an electrical connection between the electrodes of the two adjacent subcells;
• placing a common gas space in the center of the subcells so that the common gas space is in communication with the subcells;
• disposing the subcells between two pressure plates functioning as current-discharge poles;
• making each of the positive and negative electrodes, separators and walls in the shape of a plate;
• and
• placing the plates in a stack and pressing the plates together permanently during assembly.

A method for producing a battery, comprising:

• disposing a plurality of subcells in a gastight casing and pressing the subcells against each other, wherein each subcell has positive and negative electrodes and a separator disposed between the electrodes;
• impregnating each separator with a predetermined amount of electrolyte;
• disposing an electrically conductive wall between two adjacent subcells to separate the electrolytes of the two adjacent subcells and to provide an electrical connection between the electrodes of the two adjacent subcells;
• placing a common gas space in the center of the subcells so that the common gas space is in communication with the subcells;
• disposing the subcells between two pressure plates functioning as current-discharge poles;
• and
• evacuating the battery and filling the battery by flushing with hydrogen without pressure.