KR-20260064276-A - BATTERY PACK

KR20260064276AKR 20260064276 AKR20260064276 AKR 20260064276AKR-20260064276-A

Abstract

A battery pack is disclosed in which a case portion accommodating a battery group comprises: a lower case region in which a lower flow path is formed; and an upper case region in which an upper flow path is formed; wherein, when a cooling fluid is supplied to the flow path, the flow direction of the cooling fluid in the first upper flow path region among the upper flow paths and the flow direction of the cooling fluid in the first lower flow path region provided to face the first upper flow path region in an upward and downward direction among the lower flow paths are configured to be opposite to each other.

Inventors

김화성

Assignees

현대모비스 주식회사

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (10)

A battery group comprising a plurality of battery cells, each including an electrode and a separator; A case portion having a receiving space for accommodating the battery group and a flow path formed spaced apart from the receiving space and formed to allow a cooling fluid to flow; and A first connecting part and a second connecting part connected to one side of the case part and configured to communicate with the fluid path of the case part; comprising The above case part is, A lower case region provided on the lower side of the battery group and having a lower fluid path formed therein among the fluid paths; and Includes an upper case region provided on the upper side of the battery group and having an upper fluid path among the fluid paths formed therein; A battery pack configured such that when a cooling fluid is supplied to the flow path through the first connection or the second connection, the flow direction of the cooling fluid in the first upper flow path region among the upper flow paths and the flow direction of the cooling fluid in the first lower flow path region among the lower flow paths, which is provided to face the first upper flow path region in the vertical direction, are opposite to each other.
In claim 1, The above case part is, A side connecting area provided on the horizontal side of the plurality of battery groups and connecting the lower case area and the upper case area; further comprising In the above-mentioned side connection area, a side flow path is formed that communicates with the first connection part or the second connection part of the above flow path, and A battery pack in which the side flow path is branched into an upwardly extending section and a downwardly extending section at the portion where the first connecting portion and the side flow path meet and at the portion where the second connecting portion and the side flow path meet.
In claim 2, It further includes a jump flow path coupled to one side of the upper case region; and A jump channel is formed within the jump channel section, wherein the first side is in communication with the side channel and the second side is in communication with the upper channel. The first side of the jump lane and the second side of the jump lane are horizontally spaced apart from each other in a battery pack.
In claim 3, The part connected to the second side of the jump path in the upper path is a battery pack forming one end of the upper path.
In claim 3, The above upper Euro is, It further includes a spaced-apart flow path region extending in a direction toward the second connection part from a first side flow path communicating with the first connection part among the above side flow paths, and When viewed from above, one end of the above-described separated flow path region is a battery pack located between i) the first side flow path communicating with the first connection part and ii) the second side flow path communicating with the second connection part among the side flow paths.
In claim 3, The first side of the jump path is in communication with the second side path, and The above jump Euro section is a battery pack coupled to the upper side of the upper case area.
In claim 6, The above jump lane is a battery pack formed above the above upper lane.
In claim 3, The second side of the jump lane is a battery pack located inward in the horizontal direction compared to the first side of the jump lane.
In claim 2, A battery pack in which the length of the section extending upward at the point where the side channel meets the first connection and the second connection is longer than the length of the section extending downward at the point where the side channel meets the first connection and the second connection.
In claim 1, A battery pack having a first upper flow path region and a first lower flow path region having corresponding shapes.

Description

Battery Pack The present invention relates to a battery pack, and more specifically, to a battery pack comprising a structure capable of cooling the battery. The performance of batteries installed in electric vehicles is a critical factor in determining the vehicle's performance and lifespan. For example, batteries generate a significant amount of heat during the charging and discharging processes and therefore require cooling; effective cooling is essential for the smooth operation of batteries in electric vehicles. Meanwhile, depending on whether the cooling fluid passes facing one side of the battery, cooling methods can be classified into single-sided cooling and double-sided cooling methods. Among these, the single-sided cooling method refers to a method in which the cooling fluid passes facing one side of the battery. However, according to conventional technology, the single-sided cooling method had a problem in that the opposite side of the battery could not properly exchange heat with the cooling fluid, resulting in large cooling variations across different regions of the battery. Meanwhile, to address the disadvantages of the aforementioned single-sided cooling method, conventional technology refers to a method in which a cooling fluid passes facing both sides of a battery (e.g., the top and bottom surfaces). In this case, while there is the advantage of being able to cool each side of the battery, there was a problem in that the degree of cooling varied depending on the location of the battery. Specifically, there was a problem of significant cooling variation between batteries, as batteries exchanging heat with the cooling fluid passing through the upstream section of the cooling path were cooled relatively more, while batteries exchanging heat with the cooling fluid passing through the downstream section were cooled relatively less. FIG. 1 is an enlarged view of a case portion, a first connection portion, and a second connection portion constituting a battery pack according to the present invention. FIG. 2 is a drawing illustrating the cross-sectional structure of the first connection part and the surrounding area in a battery pack according to the present invention. FIG. 3 is a diagram illustrating the cross-sectional structure of the second connection part and its surroundings in a battery pack according to the present invention. FIG. 4 is a schematic diagram illustrating the lower case area and lower flow path of a battery pack according to the present invention. FIG. 5 is a schematic diagram illustrating the upper case area, upper flow path, and jump flow path of a battery pack according to the present invention. Figure 6 is an enlarged view of the jump Euro section of Figure 5. FIG. 7 is a diagram illustrating a flow path and a jump flow path formed by a battery pack according to the present invention. Hereinafter, a battery pack according to the present invention will be described with reference to the drawings. battery pack FIG. 1 is an enlarged view of a case portion, a first connection portion, and a second connection portion constituting a battery pack according to the present invention, and FIG. 2 is a cross-sectional view of the first connection portion and its surroundings in a battery pack according to the present invention. FIG. 3 is a cross-sectional view of the second connection portion and its surroundings in a battery pack according to the present invention, and FIG. 4 is a schematic view of a lower case area and a lower flow path of a battery pack according to the present invention. FIG. 5 is a schematic view of an upper case area, an upper flow path, and a jump flow path portion of a battery pack according to the present invention, and FIG. 6 is an enlarged view of the jump flow path portion of FIG. 5. FIG. 7 is a view of a flow path and a jump flow path formed by a battery pack according to the present invention. Referring to FIGS. 1 to 3, a battery pack (10) according to the present invention may include a battery group (100) comprising a plurality of battery cells including electrodes and separators, a receiving space for accommodating the battery group (100), a case portion (200) provided spaced apart from the receiving space and having a flow path (U) formed therein through which a cooling fluid can flow, and a first connecting portion (300) and a second connecting portion (300) connected to one side of the case portion (200) and provided to communicate with the flow path (U) of the case portion (200). For example, the first connecting portion (300) may be an inlet portion providing a path for supplying a cooling fluid to the flow path (U) of the case portion (200), and the second connecting portion (300) may be an outlet portion providing a path for discharging a cooling fluid from the flow path (U) of the case portion (200). However, unlike the above, the first connection part (300) may be an outlet part and the second connection part (400) may be an inlet part. Meanw