IP Library › Granted Patent US 12683184
Granted Patent B2
US 12683184 · App. 18/148,054 · Granted Jul 14, 2026

Battery cell connection structure

Inventor: Yuya Ishihara (Wako, JP)
Assignee: HONDA MOTOR CO., LTD.
H01M10/0445H01M50/517H01M2004/027H01M2004/028
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Quick Facts
Patent No.
US 12683184
App. No.
18/148,054
Granted
Jul 14, 2026
Kind
B2
Abstract

In a battery cell connection structure for connecting two rectangular battery cells in series in a state where the two battery cells are stacked in the thickness direction thereof, a positive electrode tab of one of the battery cells and a negative electrode tab of the other of the battery cells are connected to each other in a state where the positive electrode tab and the negative electrode tab are stacked in the thickness direction while the positive electrode tab and the negative electrode tab are inclined with respect to a direction in which the two battery cells are stacked.

Claims (24)

1 . A battery cell connection structure configured to connect, in a state where a plurality of battery cells having a rectangular shape are stacked in a thickness direction thereof, adjacent battery cells of the plurality of battery cells in series,

wherein

each of the plurality of battery cells includes a positive electrode tab and a negative electrode tab provided on a first side of a plurality of sides thereof,

the plurality of battery cells are stacked with the first sides being oriented in a same direction,

a first electrode tab, which is one of the positive electrode tab and the negative electrode tab, includes a first inclined portion that inclines with respect to a stacking direction of the plurality of battery cells and a direction connecting the first sides and second sides opposite the first sides,

a second electrode tab, which is another one of the positive electrode tab and the negative electrode tab, includes an extension portion that extends toward the first electrode tab of an adjacent battery cell, and a second inclined portion that extends along the first inclined portion of the first electrode tab of the adjacent battery cell from the extension portion,

battery cells adjacent to each other in a state where the first inclined portion of the first electrode tab and the second inclined portion of the second electrode tab are overlapped and form a pair are connected in series, and

in the stacking direction of the plurality of battery cells, the first inclined portions and the second inclined portions of a plurality of the pairs are arranged at a regular interval.

2 . The battery cell connection structure according to claim 1 , wherein

each of the battery cells is a laminated battery.

3 . The battery cell connection structure according to claim 1 , wherein

in a state where the first inclined portion and the second inclined portion of one overlapped pair are sandwiched between a tab holder and a plate, the plate and the tab holder are fastened to each other by a screw.

4 . The battery cell connection structure according to claim 3 , wherein

a fastening portion of the screw is positioned apart from the first sides in the stacking direction of the plurality of battery cells.

5 . The battery cell connection structure according to claim 3 , wherein

a fastening portion of the screw that fastens the first inclined portion of one of a pair of battery cells and the second inclined portion of another of the pair of battery cells overlaps at least one of another pair of battery cells in the stacking direction of the plurality of battery cells.

6 . The battery cell connection structure according to claim 3 , wherein

a head of the screw that fastens the first inclined portion of the first electrode tab of one of a pair of battery cells and the second inclined portion of the second electrode tab of another of the pair of the battery cells is disposed so as not to overlap the tab holder provided with respect to another pair of battery cells when viewed from an axial direction of the screw.

7 . The battery cell connection structure according to claim 1 , wherein

the first inclined portion and the second inclined portion are formed by the positive electrode tab and the negative electrode tab being bent at a same angle so as to extend in an oblique direction with respect to the stacking direction of the plurality of battery cells and the direction connecting the first sides and second sides.

8 . The battery cell connection structure according to claim 1 , further comprising a tab holder that contacts one of the first inclined portion or the second inclined portion,

wherein

the first inclined portion and the second inclined portion are formed by the positive electrode tab and the negative electrode tab being bent at a same angle so as to extend in an oblique direction with respect to the stacking direction of the plurality of battery cells and the direction connecting the first sides and second sides, and

the tab holder is formed so as to extend along the first inclined portion and the second inclined portion.