Battery tab configuration
Systems and methods for constructing and assembling a battery are provided. A battery, may comprise a cell tab support and a plurality of stacked battery cells, where a portion of the cells extends through the cell tab support and is folded over on top of the cell tab support. Each of the plurality of stacked battery cells may comprise two oppositely charged electrode tab terminals bent in opposite directions below the cell tab support, and bent in the same direction over the top of the cell tab support.
1 . A battery, comprising:
a cell tab support; and
a plurality of stacked battery cells, each of the plurality of stacked battery cells comprising two oppositely charged cell tab terminals which protrude through the cell tab support and are bent in a first direction over the cell tab support,
wherein the two oppositely charged cell tab terminals include a first cell tab terminal and a second cell tab terminal,
wherein the first cell tab terminal is pre-folded and includes a lower first section, a middle second section and an upper third section and the second cell tab terminal is pre-folded and includes a lower first section, a middle second section and an upper third section,
wherein the upper third section of the first cell tab terminal is displaced in along a lateral axis from the lower first section of the first cell tab terminal in the first direction by a first distance and the upper third section of the second cell tab terminal is displaced along the lateral axis from the lower first section of the second cell tab terminal in a second direction opposite the first by a second distance, the first distance being shorter than the second distance,
wherein each of the plurality of stacked battery cells is adjacent to an adjacently stacked battery cell, the adjacently stacked battery cell including a first cell tab terminal pre-folded as the first cell tab terminal of the plurality of stacked battery cells including an upper third section displaced in the first direction by the first distance and a second cell tab terminal pre-folded as the second cell tab terminal of the plurality of stacked battery cells including an upper third section displaced in the second direction by the second distance, and
wherein at least a portion of the first cell tab terminal of each of the plurality of stacked battery cells is in face sharing contact and nested with the second cell tab terminal of the adjacently stacked battery cell and the second cell tab terminal of each of the plurality of stacked battery cells is in face sharing contact and nested with the first cell tab terminal of the adjacently stacked battery cell.
2 . The battery of claim 1 , wherein the first cell tab terminal of each of the plurality of stacked battery cells is bent between the lower first section and the middle second section in the first direction towards a front of the battery.
3 . The battery of claim 1 , wherein the first cell tab terminal of the adjacently stacked battery cell is in face sharing contact with the second tab terminal of the plurality of stacked battery cells where not folded over the cell tab support.
4 . The battery of claim 1 , wherein the second cell tab terminal of each of the plurality of stacked battery cells is positioned between the first cell tab terminal of the adjacently stack battery cell and the cell tab support, a portion of the second cell tab terminal protruding through the cell tab support is bent in the first direction.
5 . The battery of claim 1 , wherein the first cell tab terminal of the adjacently stacked battery cell is welded to the second cell tab terminal of each of the plurality of stacked battery cells at protruding portions of the first cell tab terminal and the second cell tab terminal.
6 . The battery of claim 1 , wherein the second cell tab terminal of each of the plurality of stacked battery cells is wider than the first cell tab terminal of each of the plurality of stacked battery cells, and wherein the second cell tab terminal comprises copper and the first cell tab terminal comprises aluminum.
7 . The battery of claim 1 , further comprising end cells positioned at either end of the plurality of stacked battery cells, the end cells comprising at least one cell tab terminal that is bent differently than the first and second cell tab terminals of the plurality of stacked battery cells.
8 . The battery of claim 7 , wherein both cell tab terminals of the end cells are bent between a lower first section and middle second section in a same direction.
9 . The battery of claim 7 , wherein both cell tab terminals of the end cells are bent between a lower first section and middle second section in a second direction, away from the front of the battery.
10 . The battery of claim 7 , further comprising bus bars positioned between the end cells and the cell tab support, the bus bars electrically coupling the end cells to terminals of the battery.
11 . A battery, comprising:
a cell tab support; and
a plurality of stacked battery cells, each of the plurality of stacked battery cells including two oppositely charged pre-folded cell tab terminals protruding through the cell tab support,
wherein the two oppositely charged pre-folded cell tab terminals of a battery cell of each of the plurality of stacked battery cells includes a first cell tab terminal and a second cell tab terminal,
wherein the first cell tab terminal includes two bends, a first bend between a lower first section and a middle second section, and a second bend between the middle second section and an upper third section, and wherein the second cell tab terminal includes two bends, a first bend between a lower first section and a middle second section and a second bend between the middle second section and an upper third section,
wherein the middle second section of the first cell tab terminal is shorter than the middle second section of the second cell tab terminal,
wherein an angle of the first bend of the first cell tab terminal is smaller than an angle of the first bend of the second cell tab terminal and the first bend of the first cell tab terminal is in an opposite direction of the first bend of the second cell tab terminal, and
wherein at least a portion of the first cell tab terminal of a battery cell of the plurality of stacked battery cells lies flat against the second cell tab terminal of an adjacent battery cell of the plurality of stacked battery cells.
12 . The battery of claim 11 , wherein the angle of the first bend of the first cell tab terminal is equal to and in an opposite direction of an angle of the second bend of the first cell tab terminal, and wherein the angle of the first bend of the second cell tab terminal is equal to and in an opposite direction of an angle of the second bend of the second cell tab terminal.
13 . The battery of claim 11 , wherein the angle of the first bend of the first cell tab terminal is between 0° and 50° and the angle of the first bend of the second cell tab terminal is between 5° and 70°.
14 . A battery, comprising:
a cell tab support including an indentation on which circuitry is overlaid, wherein the cell tab support does not carry current;
a plurality of stacked battery cells, each of the plurality of stacked battery cells comprising two oppositely charged cell tab terminals protruding through and bent over the cell tab support in a first direction; and
an end cell positioned adjacent to the plurality of stacked battery cells, the end cell comprising two oppositely charged pre-folded cell tab terminals, and wherein each of the two opposite charged cell tab terminals of the end cell are pre-folded to include a first bend between a lower first section and a middle second section and a second bend between the middle second section and an upper third section, and the first bend of each of the two opposite charged cell tab terminals of the end cell is in the same direction.
15 . The battery of claim 14 , further comprising a bus bar positioned between one of the two oppositely charged pre-folded cell tab terminals of the end cell of the plurality of stacked battery cells and the cell tab support, and wherein the bus bar is not positioned between two oppositely charged pre-folded cell tab terminals of battery cells which are not end cells and the cell tab support.
16 . The battery of claim 14 , wherein the overlaid circuitry is a flexible printed circuit, a board-to-board connector, connector support and/or thermistors.