KR-20260063298-A - BATTERY DEVICE

KR20260063298AKR 20260063298 AKR20260063298 AKR 20260063298AKR-20260063298-A

Abstract

A battery device according to the present disclosure comprises a cell assembly in which a plurality of battery cells are arranged along a first direction, a case having a receiving space in which the cell assembly is received, and a surface pressure member providing surface pressure to the cell assembly, wherein the case includes a partition wall that partitions the receiving space, and the surface pressure member may receive the partition wall internally and be coupled to the partition wall.

Inventors

홍성민
최양규
박성완
이종화
이서로
조준희
최근우

Assignees

에스케이온 주식회사

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (16)

A cell assembly in which a plurality of battery cells are arranged along a first direction; A case having a receiving space for accommodating the cell assembly; and A surface pressure member that provides surface pressure to the cell assembly above; Includes, The above case includes a partition wall that divides the above receiving space, and The above-mentioned surface pressure member accommodates the above-mentioned bulkhead inside and is a battery device coupled to the above-mentioned bulkhead.
In paragraph 1, the surface pressure member is, A base plate disposed on the upper part of the above bulkhead; and It includes a pressure member extending from the base plate and positioned to face both sides of the bulkhead, The above-mentioned pressurizing part is a battery device that elastically presses the side of the cell assembly.
In paragraph 2, the above-mentioned pressurizing part is, A pressure plate positioned at a certain distance from the above bulkhead to apply pressure to the cell assembly; A support member that is bent at the bottom of the above-mentioned pressure plate and contacts the above-mentioned bulkhead; and A connecting plate connecting the above pressure plate and the above base plate; A battery device including
In any one of paragraphs 1 through 3, The above surface pressure member is a battery device formed by bending a single metal plate.
In paragraph 3, the surface pressure member is, A first curved line connecting the base plate and the connecting plate; and A second curved line connecting the above pressure plate and the above connecting plate; Includes, A battery device in which the first curve line and the second curve line are formed parallel to the longitudinal direction of the bulkhead.
In paragraph 3 or 5, The above base plate is positioned parallel to the upper surface of the bulkhead, and The above pressure plate is a battery device positioned parallel to the side of the above bulkhead.
In paragraph 3 or 5, A battery device in which the base plate and the pressure plate are arranged to be orthogonal to each other.
In paragraph 3 or 5, the surface pressure member is, A battery device in which only the support portion contacts the bulkhead.
In paragraph 3 or 5, It further includes a deformation suppression member disposed between the pressure plate and the bulkhead to limit the deformation of the pressure plate, and A battery device in which the thickness of the above deformation suppression member is formed to be smaller than the gap between the pressure plate and the bulkhead.
In paragraph 3 or 5, A battery device further comprising a stopper formed protruding from the lower side portion of the above bulkhead, wherein the support member is prevented from moving downward by the stopper.
In Paragraph 10, It further includes a protrusion formed protruding from the upper side portion of the above bulkhead, The above-mentioned protrusion is a battery device positioned to contact the above-mentioned connecting plate.
In Paragraph 11, A battery device further comprising a fastening member that is fastened to the bulkhead while adhering the base plate to the upper surface of the bulkhead.
In Paragraph 12, A battery device in which the pressure plate is pressed in a direction away from the bulkhead as the base plate approaches the upper surface of the bulkhead.
A cell assembly in which a plurality of battery cells are arranged along a first direction; A case having a receiving space for accommodating the cell assembly; and A surface pressure member coupled to a partition wall dividing the above-mentioned receiving space; Includes, The above surface pressure member is, It includes two pressure units disposed on each side of the above bulkhead and providing surface pressure to the cell assembly along the first direction, and a base plate connecting the two pressure units. The above base plate is a battery device arranged parallel to the upper surface of the above bulkhead.
In Paragraph 14, The above base plate is a battery device spaced apart from the above bulkhead at a certain distance.
In Paragraph 14, A battery device further comprising a fastening member for fixing the base plate to the upper surface of the bulkhead.

Description

Battery Device The present disclosure relates to a battery device having a surface pressure member. Unlike primary batteries, secondary batteries can be charged and discharged, so they can be applied in various fields such as digital cameras, mobile phones, laptops, and hybrid cars. Examples of secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries. Among these secondary batteries, much research is being conducted on lithium secondary batteries, which possess high energy density and discharge voltage. Recently, lithium secondary batteries are being manufactured as flexible pouch-type battery cells, and battery devices are being manufactured in the form of modules connecting multiple such secondary batteries. When multiple battery cells are placed in a single case, if one battery cell expands, the surface pressure is not applied evenly to the other battery cells, and this variation in surface pressure can cause the battery cells to deteriorate. FIG. 1 is a perspective view schematically showing a battery device according to an embodiment of the present disclosure. FIG. 2 is a partially exploded perspective view of FIG. 1. FIG. 3 is a cross-sectional view along I-I' of FIG. 1. FIG. 4 is an enlarged view of the surface pressure member shown in FIG. 1. FIGS. 5 and FIGS. 6 are cross-sectional views illustrating the manufacturing process of the battery device shown in FIGS. 1. FIG. 7 is a cross-sectional view of a battery device according to another embodiment of the present disclosure, FIG. 8 is a cross-sectional view of a battery device according to another embodiment of the present disclosure. FIGS. 9 and FIGS. 10 are drawings illustrating the process of joining the surface pressure member shown in FIG. 8 to the bulkhead. Hereinafter, the present disclosure will be described in detail with reference to the attached drawings. However, this is merely illustrative and the present disclosure is not limited to the specific embodiments described illustratively. FIG. 1 is a perspective view schematically showing a battery device according to an embodiment of the present disclosure, and FIG. 2 is a partially exploded perspective view of FIG. 1. FIG. 3 is also a cross-sectional view along I-I' of FIG. 1. Referring to FIGS. 1 to 3, a battery device (1) according to an embodiment of the present invention may include a cell assembly (10) in which a plurality of battery cells (11) are arranged along a first direction (e.g., Y direction), a case (50) having a receiving space (S) in which the cell assembly (10) is received, and a surface pressure member (30) that provides surface pressure to the cell assembly (10). Additionally, the case (50) may include a partition (55) that partitions the receiving space (S), and the surface pressure member (30) may receive the partition (55) inside and be coupled to the partition (55). In addition, a battery device according to one embodiment may include a cell assembly (10) in which a plurality of battery cells (11) are arranged along a first direction, a case (50) having a receiving space (S) in which the cell assembly (10) is received, and a surface pressure member (30) coupled to a partition wall (55) that partitions the receiving space (S). The surface pressure member (30) includes two pressure members (32) each disposed on both sides of the partition wall (55) to provide surface pressure to the cell assembly (10) along the first direction, and a base plate (31) that interconnects the two pressure members (32). The base plate (31) may be disposed parallel to the upper surface of the partition wall (55). The cell assembly (10) may include a rechargeable and dischargeable battery cell (11), such as a lithium battery or a nickel-hydrogen battery. Each cell assembly (10) may be formed in a roughly hexahedral shape by arranging a plurality of battery cells (11) along a first direction, and may be housed in a separate housing or fixed in a state of being closely attached by means of a bracket, etc. Accordingly, the cell assembly (10) may include four sides (M1, M2, M3, M4). The four sides (M1, M2, M3, M4) may include a first side (M1) and a second side (M2) where the electrode leads of the battery cell (11) are placed, and a third side (M3) and a fourth side (M4) placed at both ends of the arrangement direction of the battery cell (11). The first side (M1) and the second side (M2) are two sides forming opposite directions, and in this embodiment, an example is given in which the electrode leads are placed on the first side (M1) and the second side (M2). However, this embodiment is not limited thereto. The third side (M3) and the fourth side (M4) are two sides forming opposite directions to each other, and may be sides orthogonal to the first side (M1) and the second side (M2). Since the third side (M3) and the fourth side (M4) form sides at both ends of the first direction, which is the arrangement di