KR-102962579-B1 - Battery module having a stacked busbar assembly

KR102962579B1KR 102962579 B1KR102962579 B1KR 102962579B1KR-102962579-B1

Abstract

A battery module comprising first and second cylindrical battery cells is provided. The module comprises a stacked busbar assembly having a bottom separator, a busbar layer, and an upper separator. A first opening in the bottom separator accommodates the positive electrode of the first battery cell and exposes a portion of the negative electrode of the first battery cell. A second opening in the bottom separator accommodates the positive electrode of the second battery cell and exposes a portion of the negative electrode of the second battery cell. The busbar layer has a first layer portion in contact with the negative electrode of the first battery cell and the negative electrode of the second battery cell, and a second layer portion in contact with the positive electrode of the first battery cell and the positive electrode of the second battery cell.

Inventors

에드워드 얀코스키
양희국
산지예프 포르쉐반
애티쉬 바랏 다히툴

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260508
Application Date: 20221213

Claims (17)

In battery modules, A first cylindrical battery cell having a positive electrode and a negative electrode; A second cylindrical battery cell having a positive electrode and a negative electrode; A laminated busbar assembly comprising a bottom separation layer, a busbar layer, and an upper separation layer, wherein the busbar layer is coupled to the layers between the bottom separation layer and the upper separation layer; The bottom separator layer is in contact with the first and second cylindrical battery cells, and the bottom separator layer has a first opening and a second opening penetrating the bottom separator layer, wherein the first opening of the bottom separator layer is sized and shaped to allow the positive electrode of the first cylindrical battery to pass into the first opening and to accommodate it, and to expose a portion of the negative electrode of the first cylindrical battery cell; and the second opening of the bottom separator layer is sized and shaped to allow the positive electrode of the second cylindrical battery cell to pass into the second opening and to accommodate it, and to expose a portion of the negative electrode of the second cylindrical battery cell; The upper separation layer has a first opening and a second opening penetrating the upper separation layer, The above busbar layer has a first layer and a second layer, the second layer is spaced apart from the first layer; the first layer is positioned opposite the negative electrode of the first cylindrical battery cell and is electrically in contact with the negative electrode of the second cylindrical battery cell; the second layer is positioned opposite the positive electrode of the first cylindrical battery cell and the positive electrode of the second cylindrical battery cell and is electrically in contact with the positive electrode of the first cylindrical battery cell and the positive electrode of the second cylindrical battery cell so that the first and second cylindrical battery cells are electrically connected in parallel. A battery module in which the first and second openings of the upper separating layer are of a size and shape to match the first and second openings of the bottom separating layer.
In paragraph 1, The first layer has first and second arched slots extending from its first edge into the first layer, and the first and second arched slots are spaced apart from each other; A battery module having first and second tabs extending toward the first and second arched slots, respectively, in the second layer.
In paragraph 2, A battery module in which the first and second tabs each contact the positive electrode of the first cylindrical battery cell and the positive electrode of the second cylindrical battery cell.
In paragraph 3, A battery module in which the negative electrode of the first cylindrical battery cell and the negative electrode of the second cylindrical battery cell each contact the first layer portion adjacent to the first and second arched slots.
In paragraph 3, The busbar layer has first and second outer walls extending vertically to the first and second layers, and the first and second layers are disposed between the first and second outer walls. A battery module in which the first bus bar is coupled to the first outer wall of the bus bar layer and the second bus bar is coupled to the second outer wall.
In paragraph 1, A battery module, wherein the first opening in the bottom separator layer has a circular opening and a skirt-shaped opening communicating with the circular opening, the circular opening communicating with the positive electrode of the first cylindrical battery cell, and the skirt-shaped opening communicating with a part of the negative electrode of the first cylindrical battery cell.
In paragraph 1, A battery module having a size and shape such that the first opening of the upper separator layer exposes a tab of the busbar layer in contact with the positive electrode of the first cylindrical battery cell and exposes a portion of the busbar layer in contact with the negative electrode of the first cylindrical battery cell.
In Paragraph 7, A battery module, wherein the first opening in the upper separating layer has a circular opening and a skirt-shaped opening communicating with the circular opening, the circular opening exposes the tab of the busbar layer in contact with the positive electrode of the first cylindrical battery cell, and the skirt-shaped opening exposes a portion of the busbar layer in contact with the negative electrode of the first cylindrical battery cell.
In paragraph 8, A battery module further comprising a sensor layer coupled to the upper separating layer, wherein the sensor layer has an electrical trace electrically coupled to the positive electrode of the first cylindrical battery cell.
In battery modules, A first cylindrical battery cell having a positive electrode and a negative electrode; A second cylindrical battery cell having a positive electrode and a negative electrode; A laminated busbar assembly comprising a bottom separation layer, a busbar layer, and an upper separation layer, wherein the busbar layer is coupled with two layers between the bottom separation layer and the upper separation layer; The bottom separator layer is in contact with the first and second cylindrical battery cells, and the bottom separator layer has a first opening and a second opening penetrating the bottom separator layer, wherein the first opening is sized and shaped to allow the positive electrode of the first cylindrical battery to pass into the first opening and to expose a portion of the negative electrode of the first cylindrical battery cell; and the second opening is sized and shaped to allow the positive electrode of the second cylindrical battery cell to pass into the second opening and to expose a portion of the negative electrode of the second cylindrical battery cell; The upper separation layer has a first opening and a second opening penetrating the upper separation layer, The busbar layer has first, second, and third layers spaced apart from each other; the first layer is positioned opposite the negative electrode of the first cylindrical battery cell and is electrically in contact with the negative electrode of the first cylindrical battery cell; the second layer is positioned opposite the positive electrode of the first cylindrical battery cell and the negative electrode of the second cylindrical battery cell and is electrically in contact with the positive electrode of the first cylindrical battery cell and the negative electrode of the second cylindrical battery cell; and the third layer is positioned opposite the positive electrode of the second cylindrical battery cell and is electrically in contact with the positive electrode of the second cylindrical battery cell so that the first and second cylindrical battery cells are electrically coupled to each other in series. A battery module in which the first and second openings of the upper separating layer are of a size and shape to match the first and second openings of the lower separating layer.
In Paragraph 10, The first layer has an arched slot extending from its edge into the first layer; The second layer has a tab and an arched slot, the tab of the second layer extends toward the arched slot of the first layer, and the arched slot of the second layer extends from its edge into the second layer; A battery module having a tab extending toward the arched slot of the second layer, the third layer above.
In Paragraph 11, The negative electrode of the first cylindrical battery cell is in contact with the first layer portion adjacent to the arched slot of the first layer portion; The tab of the second layer above is in contact with the positive electrode of the first cylindrical battery cell; The negative electrode of the second cylindrical battery cell is in contact with the second layer portion adjacent to the arched slot of the second layer portion; A battery module in which the tab of the third layer above contacts the positive electrode of the second cylindrical battery cell.
In Paragraph 10, The busbar layer has first and second outer walls extending vertically to the first and second layers, and the first and second layers are disposed between the first and second outer walls. A battery module, wherein the first layer is coupled to the first outer wall of the busbar layer and the second layer is coupled to the second outer wall.
In Paragraph 10, A battery module, wherein the first opening in the bottom separator layer has a circular opening and a skirt-shaped opening communicating with the circular opening, the circular opening communicating with the positive electrode of the first cylindrical battery cell, and the skirt-shaped opening communicating with a part of the negative electrode of the first cylindrical battery cell.
In Paragraph 10, A battery module having a size and shape such that the first opening of the upper separator layer exposes a tab of the busbar layer in contact with the positive electrode of the first cylindrical battery cell and exposes a portion of the busbar layer in contact with the negative electrode of the first cylindrical battery cell.
In paragraph 15, A battery module, wherein the first opening in the upper separating layer has a circular opening and a skirt-shaped opening communicating with the circular opening, the circular opening exposes the tab of the busbar layer in contact with the positive electrode of the first cylindrical battery cell, and the skirt-shaped opening exposes a portion of the busbar layer in contact with the negative electrode of the first cylindrical battery cell.
In paragraph 15, A battery module further comprising a sensor layer coupled to the upper separating layer, wherein the sensor layer has an electrical trace electrically coupled to the positive electrode of the first cylindrical battery cell.

Description

Battery module having a stacked busbar assembly In this specification, the inventors recognized the need for an improved battery module utilizing a stacked busbar assembly that has a relatively low height profile design and provides both series and parallel electrical configurations of cylindrical battery cells without the need to change the packaging of the battery cells. Small battery modules are often manufactured using a wire bonding process with aluminum busbars to create multiple series and parallel configurations of cylindrical battery cells. However, to obtain the desired series or parallel electrical configuration, it is often necessary to modify the packaging of the cylindrical battery cells within the module. Additionally, battery modules often have a relatively high height profile. FIG. 1 is a schematic diagram of a battery module according to an exemplary embodiment of the present invention. Figure 2 is an isometric view of the battery module of Figure 1. Figure 3 is an exploded view of the battery module of Figure 1. Figure 4 is a cross-sectional view of the battery module of Figure 3 taken along line 4-4 of Figure 1. Figure 5 is an isometric view of a battery cell retention frame used in the battery module of Figure 1. FIG. 6 is an isometric view of a first retention housing used in a battery module of FIG. 1, having a plurality of cylindrical battery cells, first and second retaining plates, and a stacked busbar assembly inside. FIG. 7 is another equilateral view of the first retention housing, a plurality of cylindrical battery cells, and the first and second retaining plates of FIG. 6. FIG. 8 is a partially exploded view of the first retention housing, a plurality of cylindrical battery cells, first and second retaining plates, and a stacked busbar assembly of FIG. 6. FIG. 9 is a plan view of the first retention housing and stacked busbar assembly of FIG. 6. FIG. 10 is a bottom view of the first retention housing, a plurality of cylindrical battery cells, and the first and second retaining plates of FIG. 6. FIG. 11 is an isometric view of the first retention housing of FIG. 6. FIG. 12 is a plan view of the first retention housing of FIG. 11. Fig. 13 is an isometric view of a plurality of cylindrical battery cells of Fig. 6. FIG. 14 is a plan view of a plurality of cylindrical battery cells of FIG. 13. FIG. 15 is an isometric view of one of the battery cells within the plurality of cylindrical battery cells of FIG. 13. FIG. 16 is an isometric view of the first and second retaining plates of FIG. 7. FIG. 17 is a plan view of the first retention housing of FIG. 6 having a plurality of cylindrical battery cells inside. Fig. 18 is an isometric view of the stacked busbar assembly of Fig. 6. Fig. 19 is another isometric view of the stacked busbar assembly of Fig. 18. FIG. 20 is a plan view of the stacked busbar assembly of FIG. 18. FIG. 21 is an exploded view of the stacked busbar assembly of FIG. 18. FIG. 22 is a plan view of a bottom separator layer used in the stacked busbar assembly of FIG. 18. FIG. 23 is an isometric view of the busbar layer used in the stacked busbar assembly of FIG. 18. Fig. 24 is a plan view of the busbar layer of Fig. 23. FIG. 25 is a plan view of the upper separator layer used in the stacked busbar assembly of FIG. 18. FIG. 26 is a plan view of a sensor layer used in the stacked busbar assembly of FIG. 18. Figure 27 is an enlarged portion of the bottom separation layer of Figure 22. Figure 28 is an enlarged portion of the upper separation layer of Figure 25. Fig. 29 is an enlarged section of the busbar layer of Fig. 24. FIG. 30 is an isometric view of a second retention housing used in the battery module of FIG. 1, having a plurality of cylindrical battery cells, first and second retaining plates, and a stacked busbar assembly inside. FIG. 31 is another equilateral view of the second retention housing, a plurality of cylindrical battery cells, and the first and second retaining plates of FIG. 30. Fig. 32 is an isometric view of a plurality of cylindrical battery cells of Fig. 31. Referring to FIGS. 1 to 15, a battery module (32) according to an exemplary embodiment is provided. Referring to FIGS. 3 and 4, the battery module (32) comprises a battery cell retention frame (50), a first retention housing (54), a plurality of cylindrical battery cells (56), retaining plates (60, 62) (shown in FIG. 8), a stacked busbar assembly (68), a second retention housing (154), a plurality of cylindrical battery cells (156), retaining plates (160, 162) (shown in FIG. 31), a stacked busbar assembly (168), a first outer plate (190), bolts (191, 192, 193, 194, 195, 196, 197, 198, 199), a second outer plate (220), bolts (221, 222, 223, 224, 225, 226, 227, 228, 229), It includes a circuit board (240), an electric busbar (242), and a cover plate (246). Battery cell retention frame Referring to FIGS. 4 and 5, a battery cell retention frame (50) is installed to hold and cool a plurality of cyli