Battery pack

Abstract

A battery pack includes: a plurality of battery cells arranged in a row in a first direction; and a cooling plate and a heat insulating sheet between the battery cells adjacent to each other in the first direction, and between the adjacent battery cells to maintain the same successive relationship in the first direction. Thus, heat propagation is effectively blocked between adjacent battery cells, and a thermal runaway chain due to heat propagation is prevented.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0039400 filed on March 26, 2023, in the Korean Intellectual Property Office, and Korean Patent Application No. 10-2024-0012440 filed on January 26, 2024, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entirety. Technical Field

[0002] One or more embodiments relate to a battery pack. Background Art

[0003] Generally speaking, unlike non-rechargeable primary batteries, secondary batteries refer to batteries that can be recharged and discharged. Secondary batteries can be used as energy sources for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, and uninterruptible power supplies, and can be used in the form of a single battery or a module in which multiple batteries are connected and grouped into one unit, depending on the type of external device applied.

[0004] Small mobile devices such as mobile phones can operate for a certain period of time with the output and capacity of a single battery, but if long-term driving and high-power driving are required as in power-consuming electric vehicles and hybrid vehicles, a module form including a large number of batteries may be implemented due to power and capacity issues, and the output voltage or output current can be increased according to the number of internal batteries. Utility Model Content

[0005] One or more embodiments are directed to a battery pack that can effectively block heat propagation between adjacent battery cells and prevent a thermal runaway chain due to the heat propagation.

[0006] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the embodiments presented in the disclosure.

[0007] According to one or more embodiments, a battery pack includes:

[0008] A plurality of battery cells are arranged in a row along a first direction, and

[0009] The cooling plate and the heat insulating sheet are located between the battery cells adjacent to each other along the first direction, and are located between the adjacent battery cells to maintain the same sequential relationship along the first direction.

[0010] Adjacent battery cells arranged in a row along the first direction may be arranged such that main surfaces occupying a largest area of ​​each of the battery cells face each other.

[0011] The cooling plate and the thermal insulation sheet can be arranged based on one battery cell among the multiple battery cells so that the chronological relationship of the cooling plate and the thermal insulation sheet or the chronological relationship of the thermal insulation sheet and the cooling plate along the first direction between the one battery cell and an adjacent front battery cell, and the chronological relationship of the cooling plate and the thermal insulation sheet or the chronological relationship of the thermal insulation sheet and the cooling plate along the first direction between the one battery cell and an adjacent rear battery cell maintain the same chronological relationship.

[0012] The relative arrangement between the cooling plate and the insulation sheet between the one battery cell and an adjacent front battery cell and the relative arrangement between the cooling plate and the insulation sheet between the one battery cell and an adjacent rear battery cell may be asymmetric relative to each other based on the one battery cell.

[0013] The cooling plate and the thermal insulation sheet may be arranged such that, according to the distance relationship between the one battery cell and the adjacent front battery cell and the distance relationship between the cooling plate and the thermal insulation sheet and the one battery cell and the adjacent rear battery cell are reversed to each other when they are arranged at a relatively short distance position and a relatively long distance position from the one battery cell.

[0014] The plurality of battery cells may be two-dimensionally arranged in a plurality of rows and a plurality of columns by including battery cells in a plurality of rows arranged along the first direction and battery cells in a plurality of columns arranged along a second direction intersecting the first direction.

[0015] The battery cells adjacent to each other to form the same row along the first direction may be arranged such that main surfaces occupying the largest area of ​​each of the battery cells face each other, and

[0016] The battery cells adjacent to each other to form the same column along the second direction may be arranged such that a first side surface and a second side surface occupying a minimum area of ​​each of the battery cells face each other.

[0017] The cooling plate and the heat insulating sheet may be formed to be disconnected from each other with respect to each of a plurality of battery cells arranged to form a same row in the first direction and to integrally extend throughout a plurality of battery cells arranged to form a same column in the second direction.

[0018] The plurality of battery cells arranged to form the same column along the second direction may form a uniform heat distribution through the cooling plate.

[0019] Each of the plurality of battery cells may include: a pair of main surfaces facing each other while occupying a maximum area; and a pair of first and second side surfaces connecting the pair of main surfaces and facing each other while occupying a minimum area,

[0020] The main surfaces of the battery cells arranged adjacent to each other to form the same column along the second direction may be thermally connected to each other through the cooling plate, and

[0021] The first side surfaces and the second side surfaces of the battery cells arranged adjacent to each other to form the same column along the second direction may be thermally connected to each other while facing each other.

[0022] The cooling plate and the heat insulating sheet may be formed to be disconnected from each other with respect to each of a plurality of battery cells arranged to form the same row along the first direction.

[0023] The cooling plate may integrally extend over a plurality of battery cells arranged to form a same column along the second direction, and

[0024] The heat insulating sheets may be separated and individually formed to be disconnected from each other with respect to each of the plurality of battery cells arranged to form the same column along the second direction.

[0025] The heat insulation sheets may be alternately arranged on the front and rear surfaces of the cooling plate in the first direction along a plurality of battery cells arranged in the second direction to form the same column.

[0026] Each of the plurality of battery cells may include: a pair of main surfaces facing each other while occupying a maximum area; and a pair of first and second side surfaces connecting the pair of main surfaces and facing each other while occupying a minimum area,

[0027] The first side surfaces and the second side surfaces of the battery cells arranged adjacent to each other to form the same column along the second direction are thermally connected to each other while facing each other, and

[0028] Main surfaces of the battery cells arranged adjacent to each other to form the same column along the second direction may be thermally insulated from each other by thermal insulation sheets alternately arranged on the front and rear surfaces of the cooling plate.

[0029] The cooling plate and the heat insulating sheet may be formed to be disconnected from each other with respect to each of a plurality of battery cells arranged to form the same row along the first direction.

[0030] The heat insulating sheet may integrally extend over a plurality of battery cells arranged to form a same column along the second direction, and

[0031] The cooling plates may be divided and individually formed to be disconnected from each other with respect to each of the plurality of battery cells arranged to form the same column in the second direction.

[0032] Each of the plurality of battery cells may include: a pair of main surfaces facing each other while occupying a maximum area; and a pair of first and second side surfaces connecting the pair of main surfaces and facing each other while occupying a minimum area,

[0033] The first side surfaces and the second side surfaces of the battery cells arranged adjacent to each other to form the same column along the second direction may be thermally connected to each other while facing each other.

[0034] The heat flow between the main surfaces of the battery cells arranged adjacent to each other to form the same column along the second direction is disconnected from the cooling plate, and

[0035] The battery cells in adjacent columns forming the columns along the second direction may be thermally insulated from each other with a heat insulation sheet integrally extending through between the battery cells in the adjacent columns.

[0036] The cooling plate and the heat insulating sheet may be formed to be disconnected from each other relative to each of a plurality of battery cells arranged adjacent to each other to form the same row along the first direction, and may be separate and individually formed to be disconnected from each of a plurality of battery cells arranged adjacent to each other to form the same column along the second direction.

[0037] The heat insulation sheets may be alternately arranged on the front and rear surfaces of the cooling plate in the first direction along a plurality of battery cells arranged in the second direction to form the same column.

[0038] Each of the plurality of battery cells may include: a pair of main surfaces facing each other while occupying a maximum area; and a pair of first and second side surfaces connecting the pair of main surfaces and facing each other while occupying a minimum area,

[0039] The first side surfaces and the second side surfaces of the battery cells arranged adjacent to each other to form the same column along the second direction may be thermally connected to each other while facing each other, and

[0040] Heat flow between main surfaces of a plurality of battery cells arranged to form the same column along the second direction is disconnected from the cooling plate, and the main surfaces are thermally insulated from insulation sheets alternately arranged on the front and rear surfaces of the cooling plate.

[0041] The plurality of battery cells two-dimensionally arranged along the first direction and the second direction may be arranged together on a chassis forming a common supporting base of the plurality of battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and other aspects, features and advantages of certain embodiments of the present disclosure will be more apparent from the following description in conjunction with the accompanying drawings, in which:

[0043] Figure 1 A perspective view illustrating a battery pack according to an embodiment;

[0044] Figure 2 Example Figure 1 An exploded perspective view of a battery pack illustrated in FIG.

[0045] Figure 3 Example Figure 1 A perspective view of a battery cell illustrated in FIG.

[0046] Figure 4 As an example Figure 1 , and is a view illustrating heat flow between one battery cell and an adjacent front battery cell and between one battery cell and an adjacent rear battery cell based on any one battery cell;

[0047] Figure 5A As an example Figure 1 A view of the arrangement of battery cells, cooling plates and thermal insulation sheets in a battery pack as illustrated in FIG.

[0048] Figure 5B As an example Figure 5A A view of a portion of a battery cell and illustrating heat flow between adjacent battery cells;

[0049] Fig. 6A A view illustrating an arrangement of a battery cell, a cooling plate, and a heat insulating sheet in a battery pack according to an embodiment;

[0050] Figure 6B As an example Fig. 6A A view of a portion of a battery cell and illustrating heat flow between adjacent battery cells;

[0051] Fig. 7A A view illustrating an arrangement of a battery cell, a cooling plate, and a heat insulating sheet in a battery pack according to an embodiment;

[0052] Figure 7B As an example Fig. 7A A view of a portion of a battery cell and illustrating heat flow between adjacent battery cells;

[0053] Fig. 8A A view illustrating an arrangement of a battery cell, a cooling plate, and a heat insulating sheet in a battery pack according to an embodiment;

[0054] Figure 8B As an example Fig. 8AA view of a portion of a battery cell and illustrating heat flow between adjacent battery cells;

[0055] Fig. 9A A view illustrating an arrangement of a battery cell, a cooling plate, and a heat insulating sheet in a battery pack according to an embodiment;

[0056] Fig. 9B As an example Fig. 9A and is a view illustrating heat flow between adjacent battery cells; and

[0057] Fig.10 is a view illustrating heat flow between adjacent battery cells according to an embodiment. DETAILED DESCRIPTION

[0058] Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein the same reference numerals refer to the same elements throughout. In this regard, the present embodiments may have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, embodiments are described below only by reference to the accompanying drawings to explain various aspects of this specification. As used herein, the term "and / or" includes any and all combinations of one or more related listed items. Expressions such as "at least one of", if following a column of elements, modify the entire column of elements and do not modify a single element in the column.

[0059] Hereinafter, a battery pack according to an embodiment will be described with reference to the accompanying drawings.

[0060] Figure 1 A perspective view illustrating a battery pack according to an embodiment.

[0061] Figure 2 Example Figure 1 An exploded perspective view of the battery pack illustrated in FIG.

[0062] refer to Figure 1 and Figure 2 , the battery pack according to the embodiment may include a plurality of battery cells 10 arranged along a first direction Z1 and a second direction Z2 intersecting each other. For example, in an embodiment, the battery pack may include a plurality of battery cells 10 arranged two-dimensionally on the chassis 100 along the first direction Z1 and the second direction Z2. The chassis 100 may form a common support base for the plurality of battery cells 10 arranged along the first direction Z1 and the second direction Z2 different from each other, for example, may be arranged at the lower position of the plurality of battery cells 10 along a third direction Z3 different from the first direction Z1 and the second direction Z2. In an embodiment, the first direction Z1, the second direction Z2, and the third direction Z3 may refer to directions intersecting each other, for example, may refer to directions intersecting perpendicularly to each other.

[0063] Figure 3 Example Figure 1 A perspective view of a battery cell 10 is shown in FIG. Figure 3 , each of the plurality of battery cells 10 forming the battery pack may include a pair of main surfaces 15 occupying a relatively largest area, an upper surface 13 and a lower surface 14 connecting the pair of main surfaces 15 to each other and forming a relatively long long side portion, and a first side surface 11 and a second side surface 12 connecting the pair of main surfaces 15 to each other and forming a relatively short short side portion. For example, in an embodiment, the pair of main surfaces 15 may refer to surfaces of the battery cell 10 facing each other along a first direction Z1, the pair of first side surfaces 11 and the second side surfaces 12 may refer to surfaces of the battery cell 10 facing each other along a second direction Z2, and the battery cell 10 may include a pair of upper surfaces 13 and a lower surface 14 facing each other along a third direction Z3 intersecting the first direction Z1 and the second direction Z2. For example, in an embodiment, the first side surface 11 and the second side surface 12 may occupy the smallest area in the battery cell 10, and the first side surface 11 and the second side surface 12 may face each other between adjacent battery cells 10 that form the same column B along the second direction Z2 along which the cooling plate P and the thermal insulation sheet I extend, and adjacent battery cells 10 that form the same column B along the second direction Z2 may be electrically connected through a connection between the first electrode E1 and the second electrode E2 formed on the first side surface 11 and the second side surface 12.

[0064] In an embodiment, a plurality of battery cells 10 may be arranged along a first direction Z1 and a second direction Z2, and in an embodiment, the first direction Z1 may refer to a direction in which main surfaces 15 of battery cells 10 arranged adjacent to each other face each other, and the second direction Z2 may refer to a direction in which first side surfaces 11 and second side surfaces 12 of battery cells 10 arranged adjacent to each other face each other. In an embodiment, a plurality of battery cells 10 forming a battery pack may be arranged two-dimensionally along the first direction Z1 and the second direction Z2, and adjacent battery cells 10 may be arranged along the first direction Z1 such that main surfaces 15 face each other, and adjacent battery cells 10 may be arranged along the second direction Z2 such that first side surfaces 11 and second side surfaces 12 face each other. Along the first direction Z1, adjacent battery cells 10 may be arranged to face each other through main surfaces 15, and along the second direction Z2, adjacent battery cells 10 may be arranged to face each other through first side surfaces 11 and second side surfaces 12. In an embodiment, the plurality of battery cells 10 forming a battery pack may include battery cells 10 in a plurality of rows A arranged along a first direction Z1 and battery cells 10 in a plurality of columns B arranged along a second direction Z2, and may be arranged two-dimensionally by forming a plurality of rows A and a plurality of columns B along the first direction Z1 and the second direction Z2, and accordingly, the first direction Z1 and the second direction Z2 may refer to the direction of the rows A and the direction of the columns B of the plurality of battery cells 10 arranged two-dimensionally.

[0065] In an embodiment, the cooling plate P and the thermal insulation sheet I may be arranged between the battery cells 10 adjacent to each other along the first direction Z1. The cooling plate P and the thermal insulation sheet I may be formed to have opposite thermal behaviors, for example, the cooling plate P may be used to strengthen or promote heat flow with the battery cells 10, and on the contrary, the thermal insulation sheet I may be used to block or inhibit heat flow with the battery cells 10. In an embodiment, the cooling plate P and the thermal insulation sheet I may be arranged to overlap each other between the battery cells 10 adjacent to each other along the first direction Z1, for example, the cooling plate P and the thermal insulation sheet I may be located between the main surfaces 15 of the battery cells 10 adjacent to each other along the first direction Z1, so that the main surfaces 15 occupying the largest area face each other. For example, the cooling plate P and the thermal insulation sheet I may be located between the main surfaces 15 of the battery cells 10 adjacent to each other along the first direction Z1 to directly contact or couple with each other without another component between them. As described above, the cooling plate P and the heat insulating sheet I having opposite thermal behaviors may be directly in contact with or coupled to each other without another component therebetween, and accordingly, the distance between the adjacent battery cells 10 may be reduced while blocking the cold and heat propagation between the adjacent battery cells 10, and by reducing the distance between the battery cells 10 adjacent to each other along the first direction Z1, a battery pack having a high energy density may be provided, and a battery pack having a high power and a high capacity compared to the same area may be provided. As described above, in an embodiment, between the battery cells 10 adjacent to each other along the first direction Z1, the cooling plate P and the heat insulating sheet I may be directly in contact with or coupled to each other without another component therebetween, for example, components other than a connector (e.g., a tape, an adhesive, etc.) for fixing or coupling the positions of the cooling plate P and the heat insulating sheet I between the battery cells 10 adjacent to each other along the first direction Z1 may not be included between the adjacent battery cells 10. For example, in an embodiment, the cooling plate P and the thermal insulation sheet I may be located between the battery cells 10 adjacent to each other along the first direction Z1, and a single cooling plate P and a single thermal insulation sheet I may be located between the battery cells 10 adjacent to each other along the first direction Z1. For example, in an embodiment, two or more cooling plates P or two or more thermal insulation sheets I that perform substantially the same function may not be located between the battery cells 10 adjacent to each other along the first direction Z1, and as described above, two or more of any one of the cooling plates P and the thermal insulation sheet I having substantially opposite thermal behaviors may not overlap each other for the same cooling and thermal insulation purposes.

[0066] Figure 4 As an example Figure 1, and is a view illustrating heat flow between one battery cell CO and an adjacent front battery cell CF and between one battery cell CO and an adjacent rear battery cell CR based on any one battery cell CO. In an embodiment, the cooling plate P and the thermal insulation sheet I may be positioned while maintaining an arrangement order of the same sequential relationship between the main surfaces 15 of the battery cells 10 arranged adjacent to each other along the first direction Z1. For example, the cooling plate P and the thermal insulation sheet I may be arranged so that the relative arrangement between the cooling plate P and the thermal insulation sheet I between any one battery cell CO and an adjacent front battery cell CF and the relative arrangement between the cooling plate P and the thermal insulation sheet I between one battery cell CO and an adjacent rear battery cell CR are asymmetrical to each other based on one battery cell CO along the first direction Z1. In an embodiment, the cooling plate P and the thermal insulation sheet I may be asymmetrically arranged between one battery cell CO and an adjacent front battery cell CF and between one battery cell CO and an adjacent rear battery cell CR based on one battery cell CO. In more detail, the cooling plate P and the heat insulating sheet I may be arranged so that the relative distance relationship between the cooling plate P and the heat insulating sheet I arranged between one battery cell CO and the adjacent front battery cell CF and the relative distance relationship between the cooling plate P and the heat insulating sheet I arranged between one battery cell CO and the adjacent rear battery cell CR are reversed to each other. For example, if the heat insulating sheet I is arranged at a short distance position toward the adjacent front battery cell CF based on one battery cell CO, and the cooling plate P is arranged at a long distance position toward the adjacent front battery cell CF, the cooling plate P may be arranged at a short distance position toward the adjacent rear battery cell CR, and the heat insulating sheet I may be arranged at a long distance position toward the adjacent rear battery cell CR. The cooling plate P and the heat insulating sheet I may be arranged so that the cooling plate P and the heat insulating sheet I arranged between one battery cell CO and the adjacent front battery cell CF and the cooling plate P and the heat insulating sheet I arranged between one battery cell CO and the adjacent rear battery cell CR have an asymmetric positional relationship based on one battery cell CO.

[0067] The cooling plate P and the heat insulating sheet I can be positioned while maintaining the same arrangement order in the first direction Z1, and accordingly, if the battery pack is assembled, it can be easier to achieve the assembly while maintaining the same arrangement order between the plurality of battery cells 10, and a battery pack that can be easily automated can be provided. In more detail, if the cooling plate P and the heat insulating sheet I are arranged in the order of cooling plate P, heat insulating sheet I or in the order of heat insulating sheet I, cooling plate P between one battery cell CO and the adjacent front battery cell CF along the first direction Z1, the cooling plate P and the heat insulating sheet I can even be arranged in the order of cooling plate P, heat insulating sheet I or in the order of heat insulating sheet I, cooling plate P between one battery cell CO and the adjacent rear battery cell CR. As described below, in various embodiments, the arrangement order in which the cooling plate P and the thermal insulation sheet I are arranged while maintaining the same sequential relationship along the first direction Z1 may mean that the cooling plate P and the thermal insulation sheet I maintain the same sequential relationship along the first direction Z1 between adjacent battery cells 10 forming the same row A (i.e., between a plurality of battery cells 10 forming the same row A while being arranged along the first direction Z1), and in various embodiments described below, the cooling plate P and the thermal insulation sheet I may be arranged in an arrangement order of different sequential relationships between adjacent battery cells 10 forming different columns B. For example, for battery cells 10 in column B that are adjacent to each other along the second direction Z2, the cooling plate P and the thermal insulation sheet I may maintain an arrangement order of the same sequential relationship between adjacent battery cells 10 forming the same corresponding column B. In more detail, the cooling plate P and the thermal insulation sheet I may maintain an arrangement order of the same sequential relationship between adjacent battery cells 10 in the battery cells 10 in one column B and between adjacent battery cells 10 in adjacent columns B. However, the arrangement order of the chronological relationship between the cooling plates P and the thermal insulation plates I between adjacent battery cells 10 in a column B may be different from the arrangement order of the chronological relationship between the cooling plates P and the thermal insulation plates I between adjacent battery cells 10 in an adjacent column B.

[0068] In an embodiment, the cooling plates P and the thermal insulation sheets I, which are arranged while maintaining the same sequence along the first direction Z1, can exhibit high performance in two opposite aspects, cooling (promoting heat flow) and thermal insulation (blocking heat propagation or inhibiting heat flow), between the battery cells 10 adjacent to each other along the first direction Z1.

[0069] In an embodiment, if any one battery cell CO among the plurality of battery cells 10 is overheated, the cooling plates P and the heat insulating sheets I arranged while maintaining the same sequential arrangement order along the first direction Z1 can effectively block thermal runaway to the front battery cells CF and the rear battery cells CR adjacent to both sides of the one battery cell CO. For example, thermal runaway from the one battery cell CO can be blocked by the heat insulating sheet I located between the one battery cell CO and the adjacent front battery cell CF and the heat insulating sheet I located between the one battery cell CO and the adjacent rear battery cell CR, and if thermal runaway is understood as a surface phenomenon in which heat is rapidly transferred through the main surfaces 15 between adjacent battery cells 10, thermal runaway from the one battery cell CO can be blocked by the heat insulating sheet I located between the one battery cell CO and the adjacent front battery cell CF and the heat insulating sheet I located between the one battery cell CO and the adjacent rear battery cell CR. For example, if an overheated battery cell CO and an adjacent front battery cell CF are observed, the overheat from the battery cell CO may be blocked by the insulation sheet I adjacent to the battery cell CO, for example, by the insulation sheet I arranged at a short distance from the battery cell CO, and if a battery cell CO and an adjacent rear battery cell CR are observed, the cooling plate P arranged adjacent to the battery cell CO (for example, the cooling plate P arranged at a short distance from the battery cell CO) does not interfere with the heat blocking of the insulation sheet I arranged at a long distance from the overheated battery cell CO, the heat transferred from the overheated battery cell CO through the cooling plate P may be blocked by the insulation sheet I, and the heat propagation to the overheated battery cell CO and the adjacent rear battery cell CR may be blocked.

[0070] In an embodiment, the cooling plates P and the heat insulating sheets I arranged while maintaining the same arrangement order in the first direction Z1 can effectively cool any one of the plurality of battery cells 10. For example, if viewed between one battery cell CO and an adjacent rear battery cell CR, heat from one battery cell CO can be removed by the cooling plate P adjacent to the one battery cell CO (e.g., the cooling plate P arranged at a short distance from the one battery cell CO), and heat from the one battery cell CO can be transferred toward the cooling plate P arranged adjacent to the one battery cell CO, for example, toward the cooling plate P arranged at a short distance from the one battery cell CO, through the main surface 15 occupying a relatively large area in the one battery cell CO. If viewed between the one battery cell CO and an adjacent rear battery cell CR, the heat insulating sheet I arranged adjacent to the one battery cell CO (e.g., the heat insulating sheet I arranged at a short distance from the one battery cell CO) can interfere with heat transfer to the cooling plate P arranged at a long distance from the one battery cell CO. However, heat from one battery cell CO can be sufficiently removed by the cooling plate P located between the one battery cell CO and the adjacent rear battery cell CR rather than by the cooling plate P located between the one battery cell CO and the adjacent front battery cell CF, and if the limited heat capacity of the cooling plate P is taken into consideration, the cooling load of the cooling plate P can be uniformly distributed overall by limiting the cooling load assigned to each cooling plate P to the battery cell 10 having the main surface 15 arranged at a short distance from the corresponding cooling plate P. For example, in a comparative example compared with the present disclosure, even if heat from the corresponding battery cell 10 is removed by the cooling plate P arranged adjacent to the main surface 15 on both sides of each battery cell 10, if the heat is received on one side of the cooling plate P or on both sides of the cooling plate P according to the limited heat capacity of the cooling plate P, there will be no difference in the heat removal capacity of the entire battery pack, but a heat distribution problem may occur between each battery cell 10 and each cooling plate P. For example, as the size of the cooling plate P or the cooling circuit connected to the cooling plate P (such as the holding capacity of the cooling medium contained in the cooling plate P or the flow rate of the fluid pump used to circulate the cooling medium (cooling circuit)) increases, the thermal capacity of the cooling plate P may require spatial allocation, and therefore, the cooling plate P set to an appropriate cooling load may have a certain degree of thermal capacity limitation.Therefore, in the embodiment, for the heat distribution between each battery cell 10 and each cooling plate P, the cooling load allocated to each cooling plate P can be limited to the battery cells 10 having the main surface 15 arranged at a short distance position from the front surface or the rear surface of each cooling plate P (the battery cells 10 arranged on one side of the cooling plate P rather than on both sides of the cooling plate P along the first direction Z1), and each cooling plate P can accommodate the heat of the battery cells 10 through its one side position along the first direction Z1 (the battery cells 10 on any one side of the battery cells 10 on both sides of the first direction Z1) rather than the two side positions (the battery cells 10 on both sides of the first direction Z1). In the embodiment, a plurality of battery cells 10 arranged to form the same column B along the second direction Z2 can form a uniform heat distribution through the cooling plate P.

[0071] Regarding cooling of one battery cell CO, a cooling plate P located between one battery cell CO and an adjacent rear battery cell CR arranged at a relatively short distance position may accommodate a large amount of heat from one battery cell CO, and a cooling plate P located between one battery cell CO and an adjacent front battery cell CF arranged at a relatively long distance position may accommodate a relatively small amount of heat transferred through a heat insulating sheet I located between one battery cell CO and an adjacent front battery cell CF arranged at a relatively short distance position. As described above, in an embodiment, asymmetric cooling may be implemented by asymmetrically arranging the cooling plates P and the heat insulating sheet I at the front and rear sides along the first direction Z1 based on any one battery cell CO among a plurality of battery cells 10, for example, a considerable amount of heat may be removed through one main surface 15 of one battery cell CO, while a relatively small amount of heat may be removed through another main surface 15 of one battery cell CO.

[0072] In an embodiment, the cooling plate P may increase a cooling area when arranged to face the main surface 15 of the battery cell 10 occupying a relatively large area, and the cooling efficiency of the battery cell 10 may be improved through a relatively large cooling area between the main surface 15 of the battery cell 10 and the cooling plate P.

[0073] In the embodiment, any one of the front and rear surfaces of the main surfaces 15 forming the battery cell 10 (corresponding to the heat transfer surface described below) may be positioned relatively adjacent to the cooling plate P of the cooling plate P and the heat insulation sheet I, and the other main surface 15 (corresponding to the heat insulation surface described below) may be positioned relatively adjacent to the heat insulation sheet I of the cooling plate P and the heat insulation sheet I. As described herein, the battery cell 10 may include a heat transfer surface and a heat insulation surface as a pair of main surfaces 15 facing each other along the first direction Z1 in which the battery cells 10 are arranged, the heat transfer surface of the battery cell 10 may refer to a surface relatively adjacent to the cooling plate P of the cooling plate P and the heat insulation sheet I, and the heat insulation surface of the battery cell 10 may refer to a surface relatively adjacent to the heat insulation sheet I of the cooling plate P and the heat insulation sheet I. In the embodiment, the heat transfer surface and the heat insulation surface of the battery cell 10 may be understood as classification according to the relative distance relationship between the cooling plate P and the heat insulation sheet I (which are peripheral components adjacent to the battery cell 10), rather than classification according to the structure of the battery cell 10. For example, in the embodiment, each battery cell 10 includes a heat transfer surface and a heat insulation surface as a pair of main surfaces 15 facing each other along the first direction Z1 in which the battery cells 10 are arranged, which may mean that the pair of main surfaces 15 of the battery cell 10 both form a heat transfer surface or that neither of the pair of main surfaces 15 of the battery cell 10 forms a heat insulation surface. For example, in the embodiment, each battery cell 10 includes a heat transfer surface and a heat insulation surface as a pair of main surfaces 15 facing each other along the first direction Z1 in which the battery cells 10 are arranged, which may mean that the individual battery cells 10 forming the battery pack may face the cooling plate P through the heat transfer surface and face the heat insulation sheet I through the heat insulation surface. For example, in the embodiment, any one of the plurality of battery cells 10 may generate a relatively large amount of heat flow through the heat transfer surface (i.e., the main surface 15 facing the cooling plate P), and block the heat flow or allow only limited heat flow through the heat insulation surface (i.e., the main surface 15 facing the heat insulation sheet I).

[0074] Figure 5A As an example Figure 1 2 is a view of the arrangement of the battery cells 10, the cooling plates P and the heat insulating sheets I in the battery pack illustrated in FIG. Figure 5B As an example Figure 5A , and is a view illustrating the heat flow between adjacent battery cells. Figure 5A and Figure 5BIn an embodiment, the cooling plate P and the thermal insulation sheet I, which are arranged while maintaining the same sequence along the first direction Z1, may extend along the second direction Z2 through between the battery cells 10 that are arranged adjacent to each other along the first direction Z1, and may extend throughout a plurality of battery cells 10 that are arranged along the second direction Z2 and form the same column B. In an embodiment, by integrally forming the cooling plate P and the thermal insulation sheet I, the cooling plate P and the thermal insulation sheet I can be assembled to extend between the battery cells 10 in adjacent columns B arranged along the second direction Z2 throughout the multiple battery cells 10 forming the corresponding column B, without considering the positional arrangement between the cooling plate P and the thermal insulation sheet I and each battery cell 10, and by arranging the cooling plate P and the thermal insulation sheet I while maintaining the same sequence of arrangement along the first direction Z1 and forming the cooling plate P and the thermal insulation sheet I into an integral structure, there is no need to consider the positional arrangement with each battery cell 10 to assemble the cooling plate P and the thermal insulation sheet I (for example, there is no need to assemble the cooling plate P and the thermal insulation sheet I by alternating the positions), and therefore, the assembly process of the cooling plate P and the thermal insulation sheet I can be easily performed. In an embodiment, the cooling plate P may be connected to a cooling circuit including a heat exchanger, and it may be necessary to form a tubular structure for fluid connection with the cooling circuit, and the complexity of the structure (which is required to connect a plurality of tube bodies to the cooling plate P in a form in which a plurality of battery cells 10 forming the same column B along the second direction Z2 are disconnected as a unit) may be avoided by forming the cooling plate P, which has an integral structure by considering the simplification of the structure for fluid connection and extends through the plurality of battery cells 10 forming the same column B along the second direction Z2. In an embodiment, the main surfaces 15 of the battery cells 10 arranged adjacent to each other to form the same column B along the second direction Z2 may be thermally connected to each other through the cooling plate P, and the first side surfaces 11 and the second side surfaces 12 of the battery cells 10 arranged adjacent to each other to form the same column B along the second direction Z2 may be thermally connected to each other while facing each other.

[0075] As mentioned above, in Figure 5B In the embodiment shown in , the cooling plate P and the thermal insulation sheet I may be arranged between the main surfaces 15 of the battery cells 10 adjacent to each other along a first direction Z1, and in a battery pack including a plurality of battery cells 10 arranged two-dimensionally along the first direction Z1 and a second direction Z2 intersecting the first direction Z1, the cooling plate P and the thermal insulation sheet I may be integrally formed throughout the plurality of battery cells 10 arranged along the second direction Z2 and forming the same column B.

[0076] As described below, in various embodiments, at least one of the cooling plate P and the thermal insulation plate I may be integrally formed throughout the multiple battery cells 10 arranged along the second direction Z2 and forming the same column B, or may be formed in a separate form relative to each of the multiple battery cells 10 forming the same column B along the second direction Z2, and the other of the cooling plate P and the thermal insulation plate I may also be integrally formed throughout the multiple battery cells 10 arranged along the second direction Z2 and forming the same column B, or may be formed in a separate form relative to each of the multiple battery cells 10 forming the same column B along the second direction Z2. As described above, in various embodiments, with respect to the battery cells 10 in the same column B arranged along the second direction Z2 and having the first side surface 11 and the second side surface 12 facing each other, the cooling plate P and the thermal insulation sheet I may extend integrally with respect to the battery cells 10 in the same column B, or may be formed in a separate form with respect to the respective battery cells 10 in the same column B, and with respect to the battery cells 10 in the same row A arranged along the first direction Z1 and having the main surfaces 15 facing each other, the cooling plate P and the thermal insulation sheet I may be formed in a disconnected form with respect to each of the plurality of battery cells 10 forming the same row A. For example, in an embodiment, if the cooling plate P and the thermal insulation sheet I extend integrally throughout the plurality of battery cells 10 forming the same row A while the main surfaces 15 occupying a relatively large area (e.g., the largest area) among the battery cells 10 forming the battery pack face each other, a significant degree of thermal interference or a thermal runaway chain may occur between the plurality of battery cells 10 forming the same row A with the cooling plate P and the thermal insulation sheet I therebetween.

[0077] Fig. 6A 2 is a view illustrating the arrangement of a battery cell 10, a cooling plate P, and a heat insulating sheet 1 in a battery pack according to an embodiment. Figure 6B As an example Fig. 6A , and is a view illustrating the heat flow between adjacent battery cells. Fig. 6A and Figure 6B In various embodiments, at least one of the cooling plate P and the heat insulating sheet I may be formed in a separate form relative to each of the plurality of battery cells 10 forming the same column B along the second direction Z2, rather than being formed integrally throughout the plurality of battery cells 10 arranged along the second direction Z2 and forming the same column B. Figure 6BAs illustrated in , the cooling plate P may be integrally formed throughout the plurality of battery cells 10 arranged along the second direction Z2 and forming the same column B, but the heat insulating sheet I may be formed in a separate form relative to each of the plurality of battery cells 10 arranged along the second direction Z2 and forming the same column B. In the above-mentioned embodiment, the cooling plate P may be integrally formed throughout the plurality of battery cells 10 arranged along the second direction Z2 and forming the same column B, may include a plurality of cooling plates P arranged along the first direction Z1, and may be formed in a separate form relative to each of the plurality of battery cells 10 arranged along the first direction Z1 and forming the same row A, while extending throughout the plurality of battery cells 10 arranged along the second direction Z2 and forming the same column B. Unlike the above-mentioned cooling plate P, the heat insulating sheet I may be separated relative to each of the plurality of battery cells 10 arranged along the second direction Z2 and forming the same column B, and at the same time, may be separated relative to each of the plurality of battery cells 10 arranged along the first direction Z1 and forming the same row A. As a result, the heat insulating sheet I may be separated individually for each battery cell 10 forming the battery pack as a unit. For example, in various embodiments, any one of the cooling plate P and the heat insulating sheet I may extend throughout the plurality of battery cells 10 forming the same column B along the second direction Z2, and the other may be formed in a separate form relative to each of the plurality of battery cells 10 forming the same column B along the second direction Z2. Figure 6B In the embodiment shown in , unlike the thermal insulation sheet I which does not require a connection structure with the outside, a cooling plate P which may need a tubular structure for fluid connection with a cooling circuit including a heat exchanger may extend integrally over a plurality of battery cells 10 forming the same column B along the second direction Z2, thereby avoiding the complexity of the structure according to the connection between the plurality of tube bodies.

[0078] refer to Figure 5B and Figure 6B, with respect to the cooling plate P integrally extending over the plurality of battery cells 10 arranged in the second direction Z2 and forming the same column B, the heat insulating sheet I may be arranged on any one of the main surfaces of the cooling plate P on both sides in the first direction Z1 (e.g., the main surfaces of the cooling plate P occupying the largest area), and the other main surface may be exposed toward the battery cells 10 by excluding the heat insulating sheet I therefrom. With respect to the position where the heat insulating sheet I is arranged, the heat insulating sheet I may be arranged on the main surface of the cooling plate P (e.g., the front surface or the rear surface of the cooling plate P forming any one of the main surfaces occupying the largest area of ​​the cooling plate P), and the main surface of the cooling plate P may face the plurality of battery cells 10 arranged in the second direction Z2 and forming the same column B with the heat insulating sheet I therebetween. In this regard, the other main surface of the cooling plate P (which is exposed by excluding the heat insulating sheet I from the rear surface or the front surface of the cooling plate P forming the other main surface of the cooling plate P) may face the plurality of battery cells 10 arranged in the second direction Z2 and forming the same column B with no heat insulating sheet I therebetween. For example, a plurality of battery cells 10 arranged along the second direction Z2 to form the same column B and facing the main surface of the cooling plate P exposed by excluding the heat insulating sheet I therefrom can maintain thermal balance with each other through heat flow through the cooling plate P. For example, the heat of an overheated battery cell 10 can be dispersed toward other battery cells 10 belonging to the same column B through heat flow through the cooling plate P, and thus overheating of the battery cell 10 can be alleviated. As described above, in Figure 5B and Figure 6B In the embodiment illustrated in , the thermal insulation sheet I can be arranged on the main surface of the cooling plate P in the same orientation as the front surface or the rear surface along the first direction Z1 on the main surface of the cooling plate P (which extends along the second direction Z2 and is formed throughout the multiple battery cells 10 forming the same column B), so that the multiple battery cells 10 forming the same column B along the second direction Z2 can maintain thermal balance through heat flow through the cooling plate P while facing the front surface or the rear surface of the cooling plate P exposed by excluding the thermal insulation sheet I therefrom.

[0079] Fig. 7A 2 is a view illustrating the arrangement of a battery cell 10, a cooling plate P, and a heat insulating sheet 1 in a battery pack according to an embodiment. Figure 7B As an example Fig. 7A , and is a view illustrating the heat flow between adjacent battery cells. Fig. 7A and Figure 7B, with respect to the cooling plate P extending over a plurality of battery cells 10 arranged along the second direction Z2 and forming the same column B, the heat insulating sheet I may be arranged on a main surface on any one side of the main surfaces on both sides of the cooling plate P along the first direction Z1 (e.g., of the main surfaces occupying the largest area of ​​the cooling plate P), and the main surface on the other side may be exposed toward the battery cells 10 by excluding the heat insulating sheet I therefrom. With respect to the positions where the heat insulating sheet I is arranged, the heat insulating sheet I may be formed on the front and rear surfaces of the cooling plate P to alternate with each other along the second direction Z2. As described above, the heat insulating sheet I may alternate with each other on the front and rear surfaces of the cooling plate P extending along the second direction Z2, and therefore, if any one of the battery cells 10 is overheated, the heat may be effectively blocked from being propagated to another adjacent battery cell 10. For example, in an embodiment, a plurality of battery cells 10 forming a battery pack may be arranged two-dimensionally along a first direction Z1 and a second direction Z2, and the heat insulation sheet I may be arranged between the main surfaces 15 of the battery cells 10 adjacent to each other along the first direction Z1, that is, between the main surfaces 15 occupying a relatively large area (e.g., the largest area), and therefore, the battery cells 10 adjacent to each other along the second direction Z2 may be arranged to face each other without the heat insulation sheet I between the first side surface 11 and the second side surface 12 of the battery cell 10 (e.g., between the first side surface 11 and the second side surface 12 occupying the smallest area). As described above, in an embodiment, the heat insulation sheet I may be arranged toward the main surface 15 occupying a relatively large area (e.g., the largest area), but the heat insulation sheet I may not be arranged toward the first side surface 11 and the second side surface 12 occupying a relatively small area (e.g., the smallest area). Therefore, heat propagation can be balanced to a certain extent through the main surfaces 15 of the overheated battery cells 10 and the first side surface 11 and the second side surface 12, and Figure 7B In the embodiment illustrated in , heat propagation from the main surface 15 occupying a relatively large area of ​​the overheated battery cell 10 through the cooling plate P and direct heat propagation from the first side surface 11 and the second side surface 12 occupying a relatively small area of ​​the overheated battery cell 10 can be directed toward different battery cells 10, and thus, a thermal runaway chain caused by heat propagation directed from the overheated battery cell 10 toward a specific adjacent battery cell 10 can be prevented. In an embodiment, the first side surface 11 and the second side surface 12 of the battery cells 10 arranged adjacent to each other to form the same column B along the second direction Z2 can be thermally connected to each other while facing each other, and the main surfaces 15 of the battery cells 10 arranged adjacent to each other to form the same column B along the second direction Z2 can be thermally insulated from each other by the heat insulation sheets I alternately arranged on the front and rear surfaces of the cooling plate P.

[0080] exist Figure 5B and Figure 6BIn the embodiment of , heat propagation from the main surface 15 of the overheated battery cell 10 occupying a relatively large area (e.g., the largest area) through the cooling plate P and direct heat propagation from the first side surface 11 and the second side surface 12 of the overheated battery cell 10 occupying a relatively small area (e.g., the smallest area) may be concentrated along the second direction Z2 toward the battery cell 10 in the same column B as the overheated battery cell 10, and therefore, a thermal runaway chain may occur. However, in Figure 7B In the embodiment of the present invention, by alternately arranging the heat insulating sheets I on the front and rear surfaces of the cooling plate P extending in the second direction Z2, it is possible to prevent heat propagation from the overheated battery cells 10 through different paths from being concentrated toward the battery cells 10 in the same column B along the second direction Z2, for example, heat propagation from the overheated battery cells 10 through different paths can be guided toward different battery cells 10. In more detail, by alternately arranging the heat insulating sheets I on the front and rear surfaces of the cooling plate P along the main surface of the cooling plate P in the second direction Z2, heat propagation from the main surface 15 of the overheated battery cells 10 through the cooling plate P extending in the second direction Z2 can be transferred along the first direction Z1 to the battery cells 10 alternately arranged from the overheated battery cells 10 toward the front side or the rear side (for example, Figure 7B The overheated battery cell 10b is not transferred along the second direction Z2 to the battery cell 10 in the same column B as the overheated battery cell 10 (eg, Figure 7B For example, heat propagation from the main surface 15 of the overheated battery cell 10 through the cooling plate P extending in the second direction Z2 may be directed in the first direction Z1 and the second direction Z2 toward the battery cell 10 (e.g., Figure 7B In contrast, direct heat propagation from the first side surface 11 and the second side surface 12 of the overheated battery cell 10 may be directed in the second direction Z2 toward the battery cell 10 in the same column B as the overheated battery cell 10 (e.g., Figure 7B As a result, heat propagation from the main surface 15 of the overheated battery cell 10 through the cooling plate P can be directed toward the battery cell 10 (e.g., Figure 7B The overheated battery cell 10a is guided in the second direction Z2 toward the battery cell 10 in the same column B as the overheated battery cell 10 (eg, Figure 7B The direct heat propagation from the first side surface 11 and the second side surface 12 of the overheated battery cell 10 may be directed in the second direction Z2 toward the battery cell 10 in the same column B as the overheated battery cell 10 (e.g., Figure 7B The battery cell 10a) is guided. Figure 5B and Figure 6B Compared with the embodiment illustrated in , heat propagation from the main surface 15 of the overheated battery cell 10 through the cooling plate P and direct heat propagation from the first side surface 11 and the second side surface 12 of the overheated battery cell 10 can be prevented from being concentrated along the second direction Z2 toward the battery cells 10 in the same column B as the overheated battery cells 10.

[0081] As mentioned above, in Figure 7B In the embodiment illustrated in , the cooling plate P may integrally extend along the second direction Z2 throughout the plurality of battery cells 10 forming the same column B, and the heat insulating sheets I may be alternately arranged on the front and rear surfaces of the cooling plate P along the main surface of the cooling plate P, so that heat propagation from the main surface 15 of the overheated battery cell 10 through the cooling plate P and direct heat propagation from the first side surface 11 and the second side surface 12 of the overheated battery cell 10 may not be concentrated toward the same battery cell 10. For example, heat propagation from the overheated battery cell 10 through different paths may be prevented from traveling along the second direction Z2 toward the battery cell 10 in the same column B as the overheated battery cell 10 (e.g., Figure 7B Therefore, thermal chain and thermal runaway of the battery cells 10 along the second direction Z2 caused by the concentration of heat propagation from the overheated battery cells 10 through different paths along the second direction Z2 toward the battery cells 10 in the same column B as the overheated battery cells 10 can be prevented.

[0082] As mentioned above, in Figure 7B In the embodiment shown in , the cooling plate P may extend along the second direction Z2 throughout the plurality of battery cells 10 forming the same column B, and the thermal insulation sheets I may be alternately arranged on the front and rear surfaces of the cooling plate P along the second direction Z2 on the main surface of the cooling plate P, so that the cooling plate P and the thermal insulation sheets I may maintain the same sequence of arrangement with respect to the battery cells 10 in the same row A arranged along the first direction Z1, and the same sequence of arrangement with respect to the battery cells 10 in the same row A arranged along the first direction Z1 may be reversed with respect to the battery cells 10 in different rows A adjacent to each other along the second direction Z2. In various embodiments, the sequence of arrangement with respect to which the cooling plate P and the thermal insulation sheets I maintain the same sequence of arrangement with respect to the battery cells 10 in the same row A arranged along the first direction Z1 may represent the sequence of arrangement with respect to which the cooling plate P and the thermal insulation sheets I maintain the same sequence of arrangement with respect to the battery cells 10 in the same row A arranged along the first direction Z1. For example, as Figure 7B, the order relationship between the cooling plate P and the heat insulating sheet I may be reversed with respect to the battery cells 10 in different rows A adjacent to each other along the second direction Z2, and the order relationship between the cooling plate P and the heat insulating sheet I may be reversed with respect to the battery cells 10 in the adjacent rows A by the alternating arrangement of the heat insulating sheet I on the front surface and the rear surface of the cooling plate P. For reference, as described herein, the column B of the battery cells 10 may refer to an arrangement of a plurality of battery cells 10 arranged along the second direction Z2, and may refer to a group of a plurality of battery cells 10 arranged along the second direction Z2 such that the first side surface 11 and the second side surface 12 occupying a relatively small area (e.g., occupying the smallest area) in the battery cells 10 face each other. The row A of the battery cells 10 may refer to an arrangement of a plurality of battery cells 10 arranged along the first direction Z1, and may refer to a group of a plurality of battery cells 10 arranged along the first direction Z1 such that the main surfaces 15 occupying a relatively large area (e.g., occupying the largest area) in the battery cells 10 face each other.

[0083] As described above, in various embodiments, the cooling plate P and the heat insulating sheet I may be arranged in the same order relative to the battery cells 10 in the same row A along the first direction Z1, and Figure 7B In the embodiment shown in , the arrangement order of the sequential relationship between the cooling plate P and the heat insulating sheet I may be reversed with respect to the battery cells 10 in different rows A adjacent to each other along the second direction Z2. Figure 5B and Figure 6B In the embodiment shown in , the cooling plate P and the thermal insulation sheet I can maintain the same chronological order relative to the battery cells 10 in the same row A along the first direction Z1, and can even maintain the same chronological order relative to the battery cells 10 in different rows A adjacent to each other along the second direction Z2.

[0084] exist Figure 5B and Figure 6B In an embodiment, for example, in an embodiment in which the cooling plate P and the heat insulating sheet I maintain the same sequential arrangement order throughout the battery cells 10 in the row A adjacent to each other along the second direction Z2, by arranging the cooling plate P extending throughout the battery cells 10 in a plurality of columns B along the second direction Z2, and arranging the heat insulating sheet I on the front and rear surfaces of the cooling plate P along the main surface of the cooling plate P, a uniform temperature distribution can be formed by heat flow between the battery cells 10 in the same column B along the second direction Z2, for example, the battery cells 10 in the same column B along the second direction Z2 can form a uniform temperature distribution by heat flow between the main surfaces 15 of the adjacent battery cells 10 passing through the cooling plate P and between the first side surface 11 and the second side surface 12 of the battery cells 10. On the contrary, in Figure 7BIn the embodiment shown in , the heat flow along the second direction Z2 between the battery cells 10 in the same column B can be suppressed to a certain extent by alternating the cooling plates P extending along the second direction Z2 throughout the plurality of battery cells 10 forming the same column B and the heat insulation sheets I alternately arranged on the front and rear surfaces of the cooling plates P along the main surfaces of the cooling plates P. Therefore, unlike the heat flow between the first side surfaces 11 and the second side surfaces 12 between the battery cells 10 in the same column B, the heat flow between the main surfaces 15 can mainly occur between the main surfaces 15 of the battery cells 10 in different columns B adjacent to each other along the first direction Z1, rather than between the main surfaces 15 of the battery cells 10 in the same column B, through the alternating arrangement of the heat insulation sheets I. As Figure 7B As illustrated in the figure, in order to implement a structure in which the thermal insulation sheets I are alternately arranged on the front and rear surfaces of the cooling plate P along the main surface of the cooling plate P (which extends along the second direction Z2 throughout the multiple battery cells 10 forming the same column B), the cooling plate P may extend continuously along the second direction Z2 throughout the multiple battery cells forming the same column B, and the thermal insulation sheets I may be arranged in a separated form relative to the multiple battery cells 10 forming the same column B, respectively.

[0085] In various embodiments, the plurality of cooling plates P and the plurality of thermal insulation sheets I may be arranged in a disconnected form relative to the battery cells 10 in each row A arranged along the first direction Z1. The cooling plates P may extend integrally over the plurality of battery cells 10 forming the same column B along the second direction Z2, and the thermal insulation sheets I may extend integrally over the plurality of battery cells 10 forming the same column B along the second direction Z2 (see Figure 5B ), or may be formed in a separated form with respect to a plurality of battery cells 10 forming the same column B along the second direction Z2.

[0086] Fig. 8A 2 is a view illustrating the arrangement of a battery cell 10, a cooling plate P, and a heat insulating sheet 1 in a battery pack according to an embodiment. Figure 8B As an example Fig. 8A The figure is a view of a portion of a battery cell and is a view illustrating the heat flow between adjacent battery cells. Fig. 9A 2 is a view illustrating the arrangement of a battery cell 10, a cooling plate P, and a heat insulating sheet 1 in a battery pack according to an embodiment. Fig. 9B As an example Fig. 9A , and is a view illustrating the heat flow between adjacent battery cells. Figure 8B and Fig. 9B, the cooling plate P may be formed in a separate form with respect to each of the plurality of battery cells 10 forming the same column B along the second direction Z2. For example, the cooling plate P may include a connector for fluidly connecting to a pipe body of a cooling circuit including a heat exchanger, and the cooling plate P including the connector of the pipe body may be integrally formed throughout the plurality of battery cells 10 forming the same column B along the second direction Z2, thereby avoiding structural complexity due to the connectors of the plurality of pipe bodies.

[0087] exist Figure 8B and Fig. 9B In the embodiment of the present invention, the cooling plate P may not be connected to the cooling circuit, for example, by natural convection cooling via low temperature atmosphere or forced convection cooling using a cooling fan, a fluid connection to the cooling circuit may not be required. Each unit cooling plate P may be connected to the cooling circuit via a fluid connection, and may be formed in a separate form relative to each of the plurality of battery cells 10 arranged along the second direction Z2 and forming the same column B, so as to avoid thermal and electrical interference between adjacent battery cells 10 arranged along the second direction Z2 and forming the same column B. For example, the cooling plates P arranged in a separate form relative to the individual battery cells 10 in the individual columns B along the second direction Z2 may block heat propagation between the battery cells 10 in the same column B along the second direction Z2, and accordingly, may block a thermal runaway chain along the second direction Z2 from overheated battery cells 10. For example, in Figure 8B and Fig. 9B In the embodiment shown in , similar to the cooling plate P, the heat insulating sheet I may also be formed in a disconnected form relative to each of the plurality of battery cells 10 forming the same column B along the second direction Z2, and as a result, the cooling plate P and the heat insulating sheet I may be formed in a separate form relative to each of the plurality of battery cells 10 forming the same column B along the first direction Z1. The cooling plate P and the heat insulating sheet I may be formed in a separate form relative to each of the plurality of battery cells 10 forming the row A along the first direction Z1, and may be formed in a separate form relative to each of the plurality of battery cells 10 forming the same column B along the second direction Z2. The cooling plate P and the heat insulating sheet I may be formed in a separate form relative to each of the battery cells 10, and as described above, by forming the cooling plate P and the heat insulating sheet separately and individually relative to each of the plurality of battery cells 10 forming the battery pack, thermal interference and electrical interference between adjacent battery cells 10 may be eliminated, for example, a thermal runaway chain due to overheating of any one of the battery cells 10 may be prevented.

[0088] exist Figure 8B In the embodiment shown in , the heat insulating sheet I may be arranged in the same orientation relative to the battery cells 10 in the same column B arranged along the second direction Z2, and may be arranged on the same main surface of the front surface or the rear surface of the cooling plate P arranged along the second direction Z2. Figure 8B The embodiments are different. Fig. 9BIn the embodiment shown in , the heat insulating sheet I may be arranged in an inverted orientation relative to the battery cells 10 in the same column B arranged along the second direction Z2, and may be alternately arranged in an inverted orientation on the front and rear surfaces of the cooling plate P arranged along the second direction Z2. Figure 8B In the embodiment illustrated in FIG. 1 , the heat insulating sheet I may be arranged on the same main surface on the front surface or the rear surface of the cooling plate P arranged along the second direction Z2, and thus, the ease of assembly of the cooling plate P and the heat insulating sheet I may be improved. Fig. 9B In the embodiment illustrated in , the heat insulating sheets I may be arranged in alternating orientations on the front and rear surfaces of the cooling plates P arranged along the second direction Z2, so that heat propagation from the overheated battery cells 10 is not directed toward any one of the battery cells 10, for example, the heat insulating sheets I may be arranged alternately so that heat propagation does not occur between the battery cells 10 adjacent to each other along the second direction Z2 through different cooling plates P that are disconnected from each other but arranged adjacent to each other. In an embodiment, the first side surfaces 11 and the second side surfaces 12 of the battery cells 10 that are arranged adjacent to each other to form the same column B along the second direction Z2 may be thermally connected to each other while facing each other, and the heat flow between the main surfaces 15 of the plurality of battery cells 10 arranged to form the same column B along the second direction Z2 may be disconnected from the cooling plates P, and the main surfaces 15 may be thermally insulated from each other by the heat insulating sheets I alternately arranged on the front and rear surfaces of the cooling plates P.

[0089] Fig.10 FIG. 1 is a view illustrating heat flow between adjacent battery cells according to an embodiment. Fig.10, the cooling plate P may be formed in a separate form relative to each of the plurality of battery cells 10 forming the same column B along the second direction Z2, and unlike the cooling plate P, the heat insulation sheet I may be integrally formed throughout the plurality of battery cells 10 forming the same column B along the second direction Z2, heat propagation between adjacent battery cells 10 belonging to the same column B along the second direction Z2 may be prevented by the heat insulation sheet I therebetween, and even if heat propagation occurs through the first side surface 11 and the second side surface 12 of another battery cell 10 adjacent to the first side surface 11 and the second side surface 12 of the overheated battery cell 10 (for example, by exposing the first side surface 11 and the second side surface 12 from the battery cell 10 in the same column B along the second direction Z2 as the overheated battery cell 10), the battery cells 10 in another column B adjacent to the battery cells 10 in the corresponding column B may block heat propagation from the heat insulation sheet I that integrally extends and passes through without space in different columns B adjacent to each other along the first direction Z1. In an embodiment, the first side surfaces 11 and the second side surfaces 12 of the battery cells 10 that are arranged adjacent to each other to form the same column B along the second direction Z2 may be thermally connected to each other while facing each other, the heat flow between the main surfaces 15 of the battery cells 10 that are arranged adjacent to each other to form the same column B along the second direction Z2 may be disconnected from the cooling plate P, and the battery cells 10 in adjacent columns B that form the column B along the second direction Z2 may be thermally insulated from each other by the thermal insulation sheet I that integrally extends through between the battery cells 10 in the adjacent columns B.

[0090] The present disclosure may provide a battery pack capable of preventing heat propagation between adjacent battery cells and a thermal runaway chain caused by the heat propagation.

[0091] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for limiting purposes. The description of features or aspects in each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined by the claims.

Claims

1. A battery pack, characterized in that: include: A plurality of battery cells are arranged in a row along a first direction; as well as A cooling plate and a heat insulating sheet are located between battery cells adjacent to each other along the first direction, wherein the cooling plate and the heat insulating sheet are located between adjacent battery cells to maintain the same sequential relationship along the first direction.

2. The battery pack according to claim 1, characterized in that: Adjacent battery cells arranged in a row along the first direction are arranged such that main surfaces occupying the largest area of ​​each of the adjacent battery cells face each other.

3. The battery pack according to claim 1, characterized in that: The cooling plate and the thermal insulation sheet are arranged based on one battery cell among the multiple battery cells so that the chronological relationship of the cooling plate and the thermal insulation sheet or the chronological relationship of the thermal insulation sheet and the cooling plate along the first direction between the one battery cell and an adjacent front battery cell, and the chronological relationship of the cooling plate and the thermal insulation sheet or the chronological relationship of the thermal insulation sheet and the cooling plate along the first direction between the one battery cell and an adjacent rear battery cell maintain the same chronological relationship.

4. The battery pack according to claim 3, characterized in that: A relative arrangement between the cooling plate and the heat shielding sheet between the one battery cell and the adjacent front battery cell and a relative arrangement between the cooling plate and the heat shielding sheet between the one battery cell and the adjacent rear battery cell are asymmetric with respect to each other based on the one battery cell.

5. The battery pack according to claim 3, characterized in that: The cooling plate and the thermal insulation sheet are arranged so that, according to the distance relationship between the one battery cell and the adjacent front battery cell and the distance relationship between the cooling plate and the thermal insulation sheet and the one battery cell and the adjacent rear battery cell are reversed to each other.

6. The battery pack according to claim 1, characterized in that: The plurality of battery cells are two-dimensionally arranged in a plurality of rows and a plurality of columns by including battery cells in a plurality of rows arranged along the first direction and battery cells in a plurality of columns arranged along a second direction intersecting the first direction.

7. The battery pack according to claim 6, characterized in that: A plurality of battery cells adjacent to each other to form the same row along the first direction are arranged so that main surfaces occupying the largest area of ​​each of the plurality of battery cells face each other, and A plurality of battery cells adjacent to each other to form the same column along the second direction are arranged such that a first side surface and a second side surface occupying a minimum area of ​​each of the plurality of battery cells face each other.

8. The battery pack according to claim 6, characterized in that: The cooling plate and the heat insulating sheet are formed to be disconnected from each other with respect to each of the plurality of battery cells arranged to form the same row in the first direction, and integrally extend throughout the plurality of battery cells arranged to form the same column in the second direction.

9. The battery pack according to claim 8, characterized in that: The plurality of battery cells arranged to form the same column along the second direction form a uniform heat distribution through the cooling plate.

10. The battery pack according to claim 8, characterized in that: Each of the plurality of battery cells includes: a pair of main surfaces facing each other while occupying a maximum area; and a pair of first and second side surfaces connecting the pair of main surfaces and facing each other while occupying a minimum area, The main surfaces of the plurality of battery cells arranged adjacent to each other to form the same column along the second direction are thermally connected to each other through the cooling plate, and The first side surfaces and the second side surfaces of the plurality of battery cells arranged adjacent to each other to form the same column along the second direction are thermally connected to each other while facing each other.

11. The battery pack according to claim 6, characterized in that: The cooling plate and the heat insulating sheet are formed to be disconnected from each other with respect to each of a plurality of battery cells arranged to form the same row along the first direction, The cooling plate integrally extends over a plurality of battery cells arranged to form a same column along the second direction, and The heat insulating sheets are separated and individually formed to be disconnected from each other with respect to each of the plurality of battery cells arranged to form the same column along the second direction.

12. The battery pack according to claim 11, characterized in that: The insulation sheets are alternately arranged on the front and rear surfaces of the cooling plate in the first direction along the plurality of battery cells arranged in the second direction to form the same column.

13. The battery pack according to claim 12, characterized in that: Each of the plurality of battery cells includes: a pair of main surfaces facing each other while occupying a maximum area; and a pair of first and second side surfaces connecting the pair of main surfaces and facing each other while occupying a minimum area, The first side surfaces and the second side surfaces of the plurality of battery cells arranged adjacent to each other to form the same column along the second direction are thermally connected to each other while facing each other, and The main surfaces of the plurality of battery cells arranged adjacent to each other to form the same column along the second direction are thermally insulated from each other by the heat insulating sheets alternately arranged on the front surface and the rear surface of the cooling plate.

14. The battery pack according to claim 6, characterized in that: The cooling plate and the heat insulating sheet are formed to be disconnected from each other with respect to each of a plurality of battery cells arranged to form the same row along the first direction, The heat insulating sheet integrally extends over a plurality of battery cells arranged to form a same column along the second direction, and The cooling plates are divided and individually formed to be disconnected from each other with respect to each of the plurality of battery cells arranged to form the same column along the second direction.

15. The battery pack according to claim 14, characterized in that: Each of the plurality of battery cells includes: a pair of main surfaces facing each other while occupying a maximum area; and a pair of first and second side surfaces connecting the pair of main surfaces and facing each other while occupying a minimum area, the first side surfaces and the second side surfaces of the plurality of battery cells arranged adjacent to each other to form the same column along the second direction are thermally connected to each other while facing each other, The heat flow between the main surfaces of the plurality of battery cells arranged adjacent to each other to form the same column along the second direction is disconnected from the cooling plate, and The plurality of battery cells in adjacent columns forming a column along the second direction and the heat insulation sheet integrally extending therethrough between the plurality of battery cells in the adjacent columns are thermally insulated from each other.

16. The battery pack according to claim 6, characterized in that: The cooling plate and the heat insulating sheet are formed to be disconnected from each other with respect to each of a plurality of battery cells arranged adjacent to each other to form the same row along the first direction, and are separated and individually formed to be disconnected from each other with respect to each of a plurality of battery cells arranged adjacent to each other to form the same column along the second direction.

17. The battery pack according to claim 16, characterized in that: The insulation sheets are alternately arranged on the front and rear surfaces of the cooling plate in the first direction along the plurality of battery cells arranged in the second direction to form the same column.

18. The battery pack according to claim 17, characterized in that: Each of the plurality of battery cells includes: a pair of main surfaces facing each other while occupying a maximum area; and a pair of first and second side surfaces connecting the pair of main surfaces and facing each other while occupying a minimum area, The first side surfaces and the second side surfaces of the plurality of battery cells arranged adjacent to each other to form the same column along the second direction are thermally connected to each other while facing each other, and Heat flow between the main surfaces of the plurality of battery cells arranged to form the same column along the second direction is disconnected from the cooling plate, and the main surfaces are thermally insulated from the insulation sheets alternately arranged on the front and rear surfaces of the cooling plate.

19. The battery pack according to claim 6, characterized in that: The plurality of battery cells two-dimensionally arranged along the first direction and the second direction are commonly arranged on a chassis forming a common supporting base of the plurality of battery cells.

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