Cell pack and method for producing unit cell for use in cell pack
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKoji Umemura
Life of this patent
Estimating the term…
Abstract
A cell pack including: a plurality of unit cells arranged in an arrangement direction, each unit cell including a cell case accommodating an electrode body and an electrolytic solution; and a spacer disposed between two unit cells adjacent to each other in the arrangement direction. The cell case has a side surface facing the spacer. At least one of the side surfaces has a pressing region pressed by the spacer and a non-pressing region not pressed by the spacer. An expanding portion bulging in a direction of approaching the spacer is provided in the non-pressing region of the cell case, and a gap between the cell case and the spacer is reduced by the expanding portion.
Claims7
A cell pack comprising:
- a plurality of unit cells arranged in an arrangement direction, each unit cell including an electrode body having a positive electrode and a negative electrode, an electrolytic solution, and a cell case accommodating the electrode body and the electrolytic solution;
- one or a plurality of spacers which is disposed between two unit cells adjacent to each other in the arrangement direction and has a protruding portion protruding toward the unit cell on at least one surface facing the unit cell;
- and
- a restraining mechanism that applies a load from the arrangement direction to the plurality of unit cells and the one or plurality of spacers, wherein
- the cell case has a side surface facing the spacer,
- the side surface has a pressing region pressed by the spacer and a non-pressing region not pressed by the spacer,
- an expanding portion bulging in a direction of approaching the spacer is provided in the non-pressing region of the cell case, and a gap between the cell case and the spacer is reduced by the expanding portion.
A method for producing a unit cell to be used in constructing a cell pack that includes:
- a plurality of unit cells arranged in an arrangement direction, each unit cell including an electrode body having a positive electrode and a negative electrode, an electrolytic solution, and a cell case accommodating the electrode body and the electrolytic solution;
- one or a plurality of spacers which is disposed between two unit cells adjacent to each other in the arrangement direction and has a protruding portion protruding toward the unit cell on at least one surface facing the unit cell;
- and a restraining mechanism that applies a load from the arrangement direction to the plurality of unit cells and the one or plurality of spacers,
- the method comprising:
- a first step of constructing an assembled body by inserting the electrode body into the cell case;
- a second step of, subsequent to the first step, restraining the assembled body in a state where the assembled body faces the spacer, and applying a pressure to an interior of the cell case, thereby forming, in the cell case, an expanding portion along a shape of the spacer;
- and
- a third step of, subsequent to the second step, injecting the electrolytic solution into the cell case in which the expansion part has been formed.
Dependencies are inferred from the claim text.