KR-20260063333-A - BATTERY ASSEMBLY AND METHOD FOR MANUFACTURING THE SAME

KR20260063333AKR 20260063333 AKR20260063333 AKR 20260063333AKR-20260063333-A

Abstract

The present disclosure relates to a battery assembly and a method for manufacturing the same. The battery assembly and the method for manufacturing the same comprise: a lower plate; a side plate connected to the lower plate and forming a receiving space together with the lower plate; a plurality of battery cells stacked and arranged in a predetermined direction within the receiving space; an upper plate coupled to the side plate to seal the receiving space; a plurality of heat-blocking members, each selectively disposed between adjacent battery cells among the plurality of battery cells and disposed within the receiving space to be in close contact with the lower plate, the side plate, and the upper plate; and at least one of the plurality of heat-blocking members comprises a fixing part formed to protrude in a direction toward at least one of the lower plate, the side plate, and the upper plate, wherein a coupling plate, which is at least one of the lower plate, the side plate, and the upper plate adjacent to the fixing part, is formed to prevent movement away from the plurality of heat-blocking members by coupling with the fixing part so as not to cause a gap to occur between the coupling plate and the plurality of heat-blocking members.

Inventors

김현석

Assignees

에스케이온 주식회사

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (14)

Bottom plate; A side plate connected to the lower plate and forming a receiving space together with the lower plate; A plurality of battery cells stacked and arranged in a predetermined direction in the above-mentioned receiving space; An upper plate coupled to the side plate to seal the above receiving space; A plurality of heat-blocking members, each selectively disposed one by one between adjacent battery cells among the plurality of battery cells and disposed in the receiving space to be in close contact with the lower plate, the side plate and the upper plate; and At least one of the plurality of heat-blocking members includes a fixing part formed to protrude in a direction toward at least one of the lower plate, the side plate, and the upper plate. A battery assembly in which at least one of the lower plate, the side plate, and the upper plate adjacent to the fixed part is formed to be coupled to the fixed part and prevented from moving away from the plurality of heat-blocking members so as not to cause a gap to occur between the fixed part and the plurality of heat-blocking members.
In paragraph 1, The above fixing part has a first groove formed in a direction perpendicular to the direction toward the coupling plate, and A battery assembly in which the above coupling plate has a second groove formed through which the above fixing part can pass, and at least a portion of the above fixing part that passes through the second groove can be inserted into the first groove.
In paragraph 2, The above fixed part is, A first extension portion formed by extending in a direction toward the above-mentioned coupling plate; and It includes a second extension part connected to one end of the first extension part, formed to be bent from the first extension part to form the first groove between it and the first extension part, The above connecting plate is, A battery assembly formed such that when the above-mentioned fixed part penetrates the second groove, it slides toward the first groove and at least a portion thereof is inserted into the first groove.
In paragraph 1, The above coupling plate has a third groove formed therein through which the above fixing part can pass, and A battery assembly formed such that the above-mentioned fixed portion penetrates the third groove and then at least a portion is bent to contact the connecting plate.
In paragraph 4, The above fixed part is, A third extension portion formed by extending in a direction toward the above-mentioned coupling plate; and A battery assembly comprising a fourth extension that is rotatably coupled to one end of the third extension and whose position can be fixed when rotated from one end of the third extension and contacts the coupling plate.
In paragraph 1, The above coupling plate has a fourth groove formed through which the above fixing part can pass, and includes a recessed portion that is recessed in a direction toward the heat-blocking member. A battery assembly formed such that the above-mentioned fixed portion penetrates the above-mentioned fourth groove and then at least a portion is bent to contact the above-mentioned recess.
In paragraph 6, The above fixed part is, A fifth extension formed by extending in a direction toward the above-mentioned depression; and A battery assembly comprising a sixth extension that is rotatably coupled to one end of the fifth extension and whose position can be fixed when rotated from one end of the fifth extension and contacts the recess.
As a method for manufacturing a battery assembly, A preparation step for preparing a lower plate, a side plate connected to the lower plate and forming a receiving space together with the lower plate, and an upper plate; A placement step of placing a component of the battery assembly in the receiving space, the component comprising a plurality of battery cells stacked in a predetermined direction, and a plurality of heat-blocking members selectively disposed one by one between adjacent battery cells among the plurality of battery cells and disposed in the receiving space to be in close contact with the lower plate, the side plate, and the upper plate; and The method includes a joining step of joining an upper plate to the side plate to seal the above receiving space, and At least one of the plurality of heat-blocking members includes a fixing part formed to protrude in a direction toward at least one of the lower plate, the side plate, and the upper plate. A method for manufacturing a battery assembly, wherein at least one of the lower plate, the side plate, and the upper plate adjacent to the fixed part is formed such that a gap is prevented between the plurality of heat-blocking members and the connecting plate is prevented from moving away from the plurality of heat-blocking members by connecting to the fixed part.
In paragraph 8, The above fixing part has a first groove formed in a direction perpendicular to the direction toward the coupling plate, and A method for manufacturing a battery assembly, wherein the above-mentioned coupling plate has a second groove formed therein through which the above-mentioned fixing part can pass, and is formed such that at least a portion of the above-mentioned fixing part can be inserted into the first groove through which the above-mentioned fixing part passes the second groove.
In Paragraph 9, The above fixed part is, A first extension portion formed by extending in a direction toward the above-mentioned coupling plate; and It includes a second extension part connected to one end of the first extension part, formed to be bent from the first extension part to form the first groove between it and the first extension part, The above connecting plate is, A method for manufacturing a battery assembly, wherein when the fixed portion penetrates the second groove, it slides toward the first groove and is formed so that at least a portion is inserted into the first groove.
In paragraph 8, The above coupling plate has a third groove formed therein through which the above fixing part can pass, and A method for manufacturing a battery assembly, wherein the above-mentioned fixing part is formed to penetrate the third groove and then at least a portion is bent to contact the coupling plate.
In Paragraph 11, The above fixed part is, A third extension portion formed by extending in a direction toward the above-mentioned coupling plate; and A method for manufacturing a battery assembly comprising a fourth extension member that is rotatably coupled to one end of the third extension member, and whose position can be fixed when rotated from one end of the third extension member and contacted by the coupling plate.
In paragraph 8, The above coupling plate has a fourth groove formed through which the above fixing part can pass, and includes a recessed portion that is recessed in a direction toward the heat-blocking member. A method for manufacturing a battery assembly, wherein the above-mentioned fixed portion is formed to penetrate the above-mentioned fourth groove and then at least a portion is bent to contact the above-mentioned recess.
In Paragraph 13, The above fixed part is, A fifth extension formed by extending in a direction toward the above-mentioned depression; and A method for manufacturing a battery assembly comprising a sixth extension member that is rotatably coupled to one end of the fifth extension member, and whose position can be fixed when rotated from one end of the fifth extension member and contacts the recessed portion.

Description

Battery Assembly and Method for Manufacturing the Same The present disclosure relates to a battery assembly and a method for manufacturing the same, and more specifically, to a battery assembly and a method for manufacturing the same that can prevent a gap from occurring between a plate forming the exterior of the battery assembly and a thermal insulation member. A battery cell includes an electrode assembly in which a positive plate and a negative plate, each coated with a positive active material and a negative active material respectively, are arranged with a separator in between, and an outer casing that seals and encloses the electrode assembly together with an electrolyte. Recently, with the increasing need for large-capacity structures and their utilization as energy storage sources, there is a growing demand for battery assemblies, such as multiple battery cells electrically connected in series and/or parallel, battery modules housing these cells, and battery management systems (BMS). Such battery assemblies are generally equipped with an outer housing made of metal to protect or house multiple battery cells from external impact. However, if a battery cell housed inside the battery assembly ignites or explodes, heat or flame may be transferred to an adjacent battery cell, causing a secondary explosion. To solve this problem, a battery assembly is configured such that when a battery cell undergoes thermal runaway, the gas generated by the thermal runaway is discharged only through a hole formed at a predetermined location, and the transfer of heat between the battery cell and an adjacent battery cell is blocked. For example, the battery assembly may include a thermal barrier member capable of blocking the transfer of heat between a battery cell and an adjacent battery cell. The thermal barrier member is coupled to the housing of the battery assembly without a gap and performs the function of preventing heat from spreading by preventing gases with high temperature and pressure from moving from a battery cell that has ignited or exploded to an adjacent battery cell. However, due to the pressure of gas generated from a thermally runaway battery cell, at least one of the lower plate, side plate, and upper plate forming the housing of the battery assembly may move away from the thermal insulation member or change its position. As such, if at least one of the bottom plate, side plate, and top plate is moved or its position is changed, a gap is created between the housing and the thermal insulation member, and there is a problem in that gas generated from a thermally runaway battery cell moves through the created gap to an adjacent battery cell and diffuses heat. To solve this problem, the bottom plate, side plate, and top plate constituting the housing are sometimes formed thicker to prevent the position of the battery assembly housing from changing. However, forming the bottom plate, side plate, and top plate thicker in this way leads to the problem of the battery assembly becoming heavier. Therefore, there is a need to develop a battery assembly that can be formed relatively lightly while preventing heat from spreading to adjacent battery cells when a thermal runaway phenomenon occurs in a battery cell included in the battery assembly. FIG. 1 is an exploded perspective view of a battery assembly according to one embodiment of the present disclosure. Figure 2 is a drawing showing a lower plate and a side plate forming a receiving space. Figure 3 is a drawing illustrating a plurality of battery cells and a plurality of thermal insulation members. Figure 4 is a drawing illustrating a heat-blocking member with a fixed portion formed thereon. Figure 5 is a drawing showing the fixed part of the heat-blocking member and the upper plate combined. FIG. 6 is a drawing showing the appearance before the upper plate and the fixing part according to one embodiment are combined. FIG. 7 is a drawing showing the appearance after the upper plate and the fixing part according to one embodiment are combined. FIG. 8 is a drawing showing the appearance before the upper plate and the fixing part according to another embodiment are combined. FIG. 9 is a drawing showing the appearance after the upper plate and the fixing part according to another embodiment are combined. Figure 10 is a drawing showing the appearance before the upper plate with the formed depression and the fixed part are combined. Figure 11 is a drawing showing the appearance after the upper plate with the indentation formed and the fixed part are combined. FIG. 12 is a flowchart illustrating a method for manufacturing a battery assembly according to one embodiment of the present disclosure. Embodiments of the present invention are described below with reference to the attached drawings to enable those skilled in the art to easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodime