Battery pack

Abstract

A battery pack includes: a base plate in which two or more battery cells are in contact with a first surface of the base plate and a base flow path through which a refrigerant cooling the battery cells circulates is in the base plate; and a frame portion in which two or more frames are coupled to each other on an upper side of the first surface of the base plate to form an accommodating space for accommodating the battery cells, and formed therein by a side surface flow path connected to the base flow path through which the refrigerant flows in and out.

Description

Technical Field

[0001] The present disclosure relates to a battery pack. Background Art

[0002] Generally, secondary batteries (or rechargeable batteries) are widely used in mobile devices, auxiliary power devices, and the like.

[0003] In addition, secondary batteries have also attracted attention as the main power source for electric vehicles, hybrid electric vehicles (e.g., plug-in hybrid electric vehicles), etc., which have been proposed as alternatives to solve various problems such as air pollution of conventional gasoline or diesel vehicles.

[0004] In electric vehicles and the like, a battery pack is formed by stacking a plurality of battery cells and then electrically connecting the battery cells in series and / or in parallel to achieve a high-output and large-capacity battery.

[0005] A plurality of battery cells are stacked in the battery pack, and the terminals exposed at both ends of each battery cell are electrically connected to provide a high voltage.

[0006] However, a battery pack that generates a high voltage requires more effective cooling of the battery cells to improve driving stability during continuous use of the battery pack.

[0007] The above information disclosed in the technology used as the background of the present disclosure is only for improving the understanding of the background of the present disclosure, and thus may include information that does not constitute related art. Summary of the Utility Model

[0008] Embodiments of the present disclosure relate to a battery pack that can cool three surfaces of a plurality of battery cells accommodated in a frame portion to provide more effective cooling of the battery cells.

[0009] In one embodiment, the battery pack includes: a battery cell; a base plate including a first surface and a base flow path, wherein the battery cell is in contact with the first surface, and the base flow path is configured to circulate a refrigerant to cool the battery cell; and a frame portion including frames coupled to each other on an upper side of the first surface of the base plate. The frame portion has an accommodation space for accommodating the battery cell and a side surface flow path connected to the base flow path, and the refrigerant is configured to flow through the side surface flow path.

[0010] The base plate may include: a cooling plate including the first surface and the base flow path; a flow path connection part coupled to one end of the cooling plate and connecting the side surface flow path of the frame part and the base flow path; and a refrigerant guide part coupled to the other end of the cooling plate. The refrigerant guide part is configured to guide the refrigerant introduced into the base flow path to flow through the flow path connection part in the discharge direction.

[0011] The base flow path may include an inflow flow path and a discharge flow path. The refrigerant introduced through the flow path connection part moves through the inflow flow path in a first direction inside the cooling plate, and in the discharge flow path, the flow direction of the refrigerant introduced through the inflow flow path is reversed at the position of the refrigerant guide part to move in a second direction opposite to the first direction. The inflow flow path extends along the first direction inside the cooling plate to introduce the refrigerant and is connected to the discharge flow path at the position of the refrigerant guide part, and the discharge flow path is connected to the inflow flow path inside the cooling plate.

[0012] The battery pack may include a first coupling groove coupled to the flow path connection part at the one end of the cooling plate. The first coupling groove opens a part of each of the inflow flow path and the discharge flow path.

[0013] The flow path connection part may include: a first connection part coupled to the one end of the cooling plate to connect the inflow flow path to the side surface flow path of the frame part; and a second connection part coupled to the one end of the cooling plate to connect the discharge flow path to the side surface flow path of the frame part.

[0014] The first connection part may include: a first bent plate including one side covering the first coupling groove and the other side extending in the thickness direction of the cooling plate; and a first pipeline protruding from the upper side of the first bent plate, extending into the frame part, and connecting the inflow flow path and the side surface flow path. The second connection part may include: a second bent plate including one side covering the first coupling groove and the other side extending in the thickness direction of the cooling plate; and a second pipeline protruding from the upper side of the second bent plate, extending into the frame part, and connecting the discharge flow path and the side surface flow path.

[0015] The battery pack may include a second coupling groove at the other end of the cooling plate. The second coupling groove is coupled to the refrigerant guiding portion and opens another part of each of the inflow flow path and the discharge flow path.

[0016] The refrigerant guiding portion may include a second bent plate including one side covering the second coupling groove and the other side extending in the thickness direction of the cooling plate.

[0017] The frame portion may include: a composite frame coupled to one edge of the base plate, wherein a first side surface flow path is inside the composite frame, and the first side surface flow path is connected to the first connection portion and the second connection portion to supply the refrigerant; an end frame coupled to the other edge of the base plate; a first side frame, both ends of which are respectively connected to one end of each of the composite frame and the end frame; and a second side frame, both ends of which are respectively connected to the other end of each of the composite frame and the end frame.

[0018] The battery pack may include: a gas discharge portion configured to discharge gas generated from one of the battery cells in the composite frame, wherein the gas discharge portion includes: a gas inflow portion on a first side surface of the composite frame, and the gas generated from the one of the battery cells is introduced through the gas inflow portion; and a gas discharge portion at the composite frame, and the gas introduced into the gas inflow portion is discharged to the outside through the gas discharge portion.

[0019] The interior of the composite frame may be divided into a first region and a second region, wherein the first side surface flow path is at the first region, and wherein the gas discharge portion is at the second region.

[0020] The gas discharge portion may include: a discharge unit protruding from a second side surface of the composite frame facing the first side surface; and a guiding portion protruding from an inner wall surface of the second region inside the composite frame. The discharge unit is configured to discharge the gas, and the guiding portion is configured to guide the gas toward the discharge unit.

[0021] The frame portion may include a side surface cooling frame in contact with side surfaces of the plurality of battery cells.

[0022] One side of the side surface cooling frame may be connected to the first side surface flow path of the composite frame, wherein the other side of the side surface cooling frame extends in a direction toward the end frame, and wherein a second side surface flow path through which the refrigerant flows is inside the side surface cooling frame.

[0023] The first side surface flow path may include an upper flow path connected to the first pipeline and a lower flow path connected to the second pipeline, and the second side surface flow path may include: a side surface upper flow path extending in the length direction inside the side surface cooling frame and connected to the upper flow path of the composite frame; and a side surface lower flow path extending in the length direction inside the side surface cooling frame and below the side surface upper flow path to be connected to the lower flow path of the composite frame.

[0024] The battery pack may include a side surface refrigerant guiding portion at the other side of the side surface cooling frame, wherein the side surface refrigerant guiding portion is configured to change the flow direction of the refrigerant flowing through the side surface upper flow path to the direction of the side surface lower flow path.

[0025] The inflow flow path may include: a first inflow flow path extending along the first direction at one side of the cooling plate to introduce the refrigerant and connected to the discharge flow path; and a second inflow flow path extending along the first direction at the other side of the cooling plate to introduce the refrigerant and connected to the discharge flow path, and wherein the discharge flow path includes: a first discharge flow path extending along the first direction between the first inflow flow path and the second inflow flow path inside the cooling plate and connected to the first inflow flow path to discharge the refrigerant; and a second discharge flow path extending along the first direction between the first inflow flow path and the second inflow flow path inside the cooling plate and connected to the second inflow flow path to discharge the refrigerant.

[0026] The flow path connection portion may include: a first connection portion coupled to the one end of the cooling plate to connect the first inflow flow path and the second inflow flow path to the side surface flow path of the frame portion; and a second connection portion coupled to the one end of the cooling plate to connect the first discharge flow path and the second discharge flow path to the side surface flow path of the frame portion.

[0027] The inflow flow path may include: a first inflow flow path that extends along the first direction inside an edge portion of one side of the cooling plate to introduce the refrigerant and is connected to the discharge flow path; a second inflow flow path that extends along the first direction inside an edge portion of the other side of the cooling plate to introduce the refrigerant and is connected to the discharge flow path; and a common inflow flow path that includes two flow paths that extend along the first direction inside the cooling plate between the first inflow flow path and the second inflow flow path and are connected to the discharge flow path. The discharge flow path may include: a first common discharge flow path that extends along the first direction inside the cooling plate between the first inflow flow path and the common inflow flow path and is connected to each of the first inflow flow path and the common inflow flow path to discharge the refrigerant; and a second common discharge flow path that extends along the first direction inside the cooling plate between the second inflow flow path and the common inflow flow path and is connected to each of the second inflow flow path and the common inflow flow path to discharge the refrigerant.

[0028] The flow path connection portion may include: a first connection portion that is coupled to the one end of the cooling plate to connect the first inflow flow path, the second inflow flow path, and the common inflow flow path to the side surface flow path of the frame portion; and a second connection portion that is coupled to the one end of the cooling plate to connect the first common discharge flow path and the second common discharge flow path to the side surface flow path of the frame portion.

[0029] According to an embodiment of the present disclosure, in a state where a plurality of battery cells including battery cells are accommodated in the frame portion, three surfaces of the bottom and side surfaces of the battery cells can be effectively cooled. The cooling battery cell configuration is configured to extend the service life of the battery pack and improve the durability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 To schematically show a perspective view of a battery pack according to a first embodiment of the present disclosure.

[0031] Figure 2 To schematically show Figure 1 an exploded perspective view of the battery pack.

[0032] Figure 3 To schematically show an exploded perspective view of a main part of a base plate according to a first embodiment of the present disclosure.

[0033] Figure 4 A plan view of a base plate schematically showing Figure 3 thereof.

[0034] Figure 5 A perspective view schematically showing a flow path connection part according to a first embodiment of the present disclosure.

[0035] Figure 6 A perspective view schematically showing a refrigerant guiding part according to a first embodiment of the present disclosure.

[0036] Figure 7 A cross-sectional view schematically showing a composite frame according to a first embodiment of the present disclosure.

[0037] Figure 8 A cross-sectional view taken along line A-A where the composite frame is installed Figure 1 thereof.

[0038] Figure 9 A cross-sectional view taken along Figure 1 line B-B thereof.

[0039] Figure 10 A perspective view schematically showing a side surface cooling frame according to a first embodiment of the present disclosure.

[0040] Figure 11 A perspective view schematically showing Figure 10 the separated state of a first plug, a second plug, and a side surface refrigerant guiding part of the side surface cooling frame thereof.

[0041] Figure 12 A cross-sectional view schematically showing Figure 10 the side surface cooling frame thereof.

[0042] Figure 13 A perspective view schematically showing a battery pack according to a second embodiment of the present disclosure.

[0043] Figure 14 A perspective view schematically showing Figure 13 the disassembled state of the battery pack thereof.

[0044] Figure 15 A perspective view schematically showing Figure 13 the plan view of the base plate thereof.

[0045] Figure 16 A cross-sectional view taken along Figure 13 line C-C thereof and schematically showing the connected state of the composite frame and the base plate through the flow path connection part.

[0046] Figure 17 A cross-sectional view taken along Figure 13The main part cross-sectional view taken along line D-D.

[0047] Figure 18 FIG. [FIG. number not provided] is a perspective view schematically showing a battery pack according to a third embodiment of the present disclosure.

[0048] Figure 19 To schematically show Figure 18 The exploded perspective view of the battery pack of

[0049] Figure 20 To schematically show Figure 18 The plan view of the base plate of

[0050] Figure 21 Along Figure 18 Line F-F and schematically showing the state in which the composite frame and the base plate are connected by the flow path connection part, the main part cross-sectional view.

[0051] Figure 22 Along Figure 18 Line E-E taken and the main part cross-sectional view. Detailed Description

[0052] The present disclosure will be described more fully hereinafter with reference to the accompanying drawings showing embodiments of the present disclosure. As those skilled in the art will recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present disclosure. The drawings and the description are to be regarded as illustrative in nature and not restrictive. Throughout the specification, the same reference numerals denote the same elements.

[0053] Figure 1 FIG. [FIG. number not provided] is a perspective view schematically showing a battery pack according to a first embodiment of the present disclosure, and Figure 2 To schematically show Figure 1 The exploded perspective view of the battery pack of

[0054] As Figure 1 And Figure 2 Shown in [[FIG. numbers not provided]], the battery pack 100 according to the first embodiment of the present disclosure may include a base plate 10 with a plurality of battery cells 11 in contact with a first surface thereof and a base flow path 20 through which a refrigerant for cooling the battery cells 11 circulates. The battery pack 100 further includes a frame portion 30 in which a plurality of frames are coupled to each other above the first surface of the base plate 10 to form a receiving space for receiving the battery cells 11. The frame portion 30 includes a side surface flow path that is connected to the base flow path 20, and the refrigerant flows in and out through the side surface flow path.

[0055] The plurality of battery cells 11 may include secondary batteries configured to repeatedly perform charge and discharge operations.

[0056] A plurality of battery cells 11 may be accommodated within the frame portion 30 in a state where the lower surface of each of the battery cells 11 is in contact with the first surface which is the upper surface of the base plate 10.

[0057] While being supported by the base plate 10, the plurality of battery cells 11 may be cooled to an appropriate temperature by a refrigerant flowing along the base plate flow path 20 formed inside the base plate 10.

[0058] Figure 3 To schematically show an exploded perspective view of the base plate 10 according to the first embodiment of the present disclosure, Figure 4 To schematically show Figure 3 a plan view of the base plate Figure 5 To schematically show a perspective view of the flow path connection portion according to the first embodiment of the present disclosure, and Figure 6 To schematically show a perspective view of the refrigerant guide portion according to the first embodiment of the present disclosure.

[0059] Referring Figures 3 to 6 , the base plate 10 may include a cooling plate 12, where the plurality of battery cells 11 are in contact with the first surface and the base flow path 20 is formed. The flow path connection portion 14 is coupled to one end of the cooling plate 12 and is connected to the first side surface flow path 311 of the frame portion 30 (see Figures 7 - 8 ) and the base flow path 20. The refrigerant guide portion 16 is coupled to the other end of the cooling plate 12 and is configured to guide the refrigerant introduced into the base flow path 20 to flow through the flow path connection portion 14 in the discharge direction.

[0060] The cooling plate 12 may have a rectangular planar shape having a length in the first direction (y-axis direction) to support the plurality of battery cells 11 arranged in the first direction on the first surface of the cooling plate 12. The shape of the cooling plate 12 is not necessarily limited to the rectangular planar shape and may have any other appropriate shape according to the number and arrangement of the battery cells 11.

[0061] The base flow path 20 for cooling the battery cells 11 may be inside the cooling plate 12.

[0062] The base flow path 20 may include: an inflow flow path 21, through which the refrigerant flows inward (or is introduced) through the flow path connection portion 14 and flows in the first direction (y-axis direction) inside the cooling plate 12; and a discharge flow path 23, through which the refrigerant is discharged by changing the flow direction of the refrigerant at the position of the refrigerant guide portion 16.

[0063] The inflow flow path 21 can be inside the cooling plate 12 and have a length direction along one edge of the cooling plate 12.

[0064] The inflow flow path 21 can be a single flow path inside the cooling plate 12 and can be configured such that the refrigerant C flowing in through the flow path connection portion 14 (to be described later) flows along the first direction.

[0065] In one or more embodiments, Figure 4 the refrigerant C can be supplied to the inside of the inflow flow path 21 through the flow path connection portion 14 at one end of the cooling plate 12. The configuration of the flow path connection portion 14 according to one embodiment will be described in more detail below.

[0066] The inflow flow path 21 can be connected to the discharge flow path 23 inside the cooling plate 12 to ensure the circulation of the refrigerant C.

[0067] The discharge flow path 23 can be connected to the inflow flow path 21 at the other end of the cooling plate 12 and can be connected to the inflow flow path 21 at the position of the refrigerant guiding portion 16 at the other end of the cooling plate 12.

[0068] In one or more embodiments, the refrigerant C can be introduced through the inflow flow path 21, and the flow of the refrigerant C can be changed in direction at the position of the refrigerant guiding portion 16 such that the refrigerant C is discharged through the discharge flow path 23.

[0069] The flow path connection portion 14 can be coupled to one end of the cooling plate 12.

[0070] The flow path connection portion 14 can be coupled to one end of the cooling plate 12 to connect the inflow flow path 21 and the discharge flow path 23 of the cooling plate 12 to the first side surface flow path 311 of the frame portion 30 (see Figures 7 - 8 ).

[0071] In one or more embodiments, the flow path connection portion 14 can include a first connection portion 141 and a second connection portion 143. The first connection portion 141 is coupled to one end of the cooling plate 12 to connect the inflow flow path 21 to the first side surface flow path 311 of the frame portion 30, and the second connection portion 143 is coupled to the same end of the cooling plate 12 to connect the discharge flow path 23 to the first side surface flow path 311 of the frame portion 30.

[0072] The first coupling groove 12a (see Figure 3 ) can be at one end of the cooling plate 12 to connect the first connection portion 141 and the second connection portion 143.

[0073] The first connection groove 12a can be configured such that a part of the end of each of the inflow flow path 21 and the discharge flow path 23 is open upward (e.g., in the Z-axis direction).

[0074] The first connection portion 141 may include a first bent plate 141a covering the first connection groove 12a and a first pipeline 141b protruding upward from the first bent plate 141a to connect to the first side surface flow path 311 of the composite frame 31.

[0075] One side of the first bent plate 141a can cover the first connection groove 12a, and the other side of the first bent plate 141a can be bent to extend in the thickness direction of the cooling plate 12 (downward in the Z-axis direction). The first bent plate 141a can be connected to the first connection groove 12a by fastening members, adhesives, etc.

[0076] The first pipeline 141b can protrude upward from the upper part of the first bent plate 141a.

[0077] The first pipeline 141b can protrude upward from the upper part of the first bent plate 141a to connect to the first side surface flow path 311 in the composite frame 31 of the frame portion 30. The first side surface flow path 311 may include an upper flow path 311a and a lower flow path 311b, and the first pipeline 141b can be connected to the upper flow path 311a. This will be described in more detail below with respect to the description of the frame portion 30.

[0078] In one or more embodiments, the first pipeline 141b can be connected to the first side surface flow path 311 in the composite frame 31 of the frame portion 30 (which will be described later) such that the refrigerant C flowing along the first side surface flow path 311 is stably connected to the inflow flow path 21 inside the cooling plate 12.

[0079] The first sealing member 141c can be at the outer surface of the first pipeline 141b.

[0080] The first sealing member 141c can be outside the first pipeline 141b to prevent (or at least mitigate) the leakage of the refrigerant C to the outside.

[0081] The first sealing member 141c can include a plurality of first sealing members on the outer surface of the first pipeline 141b.

[0082] In one or more embodiments, the first sealing member 141c may include a pair of first sealing members at positions spaced apart from each other (e.g., at an upper position and a lower position of the first pipeline 141b). In an embodiment where the first sealing member 141c includes a pair of first sealing members at the upper position and the lower position of the first pipeline 141b and the length of the first pipeline 141b is longer than the length of the second pipeline 143b, leakage of refrigerant C to the outside can be more effectively prevented.

[0083] In one or more embodiments, the second connection portion 143 may be coupled to one end of the cooling plate 12 (e.g., the same end of the cooling plate 12 as the first connection portion) to connect the discharge flow path 23 to the first side surface flow path 311 of the frame portion 30.

[0084] The second connection portion 143 may include a second bent plate 143a covering the first coupling groove 12a at the discharge flow path 23 and a second pipeline 143b protruding upward from the second bent plate 143a to connect to the first side surface flow path 311.

[0085] One side of the second bent plate 143a may cover the first coupling groove 12a formed at the discharge flow path 23, and the other side of the second bent plate 143a may be bent to extend in the thickness direction of the cooling plate 12 (downward in the Z-axis direction). The second bent plate 143a may be coupled to the first coupling groove 12a by a fastening member, an adhesive, etc.

[0086] The second pipeline 143b may protrude upward from the upper portion of the second bent plate 143a to connect to the first side surface flow path 311 in the composite frame 31 of the frame portion 30. The first side surface flow path 311 may include an upper flow path 311a and a lower flow path 311b, and the second pipeline 143b may be connected to the lower flow path 311b. This will be described in more detail below with respect to the description of the frame portion 30.

[0087] The second sealing member 143c may be a single piece on the outer surface of the second pipeline 143b. In an embodiment where the first pipeline 141b has a length longer than the length of the second pipeline 143b, the second sealing member 143c may be a single piece on the outer surface of the second pipeline 143b to prevent (or at least mitigate) leakage of refrigerant C.

[0088] In one or more embodiments, refrigerant C may be circulated and supplied (closed loop) from the frame portion 30 toward the cooling plate 12 through the flow path connection portion 14 including the first connection portion 141 and the second connection portion 143.

[0089] In one or more embodiments, refrigerant C may be introduced by flowing into flow path 21 to be circulated and discharged through discharge flow path 23, and refrigerant guiding part 16 may be located at the connection part (e.g., joint point) of inflow flow path 21 and discharge flow path 23 for circulating supply.

[0090] In one or more embodiments, a second coupling groove 12b (see Figure 3 ) that is coupled to refrigerant guiding part 16 by opening or exposing a part of inflow flow path 21 and a part of discharge flow path 23 may be located at the other end (i.e., opposite end) of cooling plate 12.

[0091] One side of refrigerant guiding part 16 may cover second coupling groove 12b, and the other side of refrigerant guiding part 16 may be bent to be used as (or applied as) a third bent plate extending in the thickness direction (Z-axis direction) of cooling plate 12.

[0092] The third bent plate may be coupled to second coupling groove 12b at an end of cooling plate 12 opposite to first coupling groove 12a, and may be coupled to second coupling groove 12b at each of inflow flow path 21 and discharge flow path 23.

[0093] In one or more embodiments, as the refrigerant moves through inflow flow path 21, the refrigerant may strike the third bent plate, causing the flow direction of the refrigerant to change. Thus, the refrigerant may move stably in the direction of discharge flow path 23.

[0094] In one or more embodiments, frame part 30 may be coupled to the upper part of base plate 10 to accommodate a plurality of battery cells 11.

[0095] In one or more embodiments, frame part 30 may include a composite frame 31, end frames 33, and first side frames 35 and second side frames 37 that connect composite frame 31 and end frames 33 respectively. Each of composite frame 31, end frames 33, first side frames 35, and second side frames 37 is coupled to the upper part of base plate 10.

[0096] Figure 7 To schematically show a cross-sectional view of composite frame 31 according to the first embodiment of the present disclosure, Figure 8 For the cross-sectional view taken along line A-A where composite frame 31 is installed, and Figure 1 For the cross-sectional view taken along line B-B of Figure 9 For along Figure 1 Of line B-B.

[0097] As Figures 7 to 9As shown, the composite frame 31 can be coupled to an edge of the base plate 10, and the first side surface flow path 311 can be inside the composite frame 31 to connect to the first connection part 141 and the second connection part 143, such that the first side surface flow path 311 is configured to supply refrigerant.

[0098] The first side surface flow path 311 can be inside the composite frame 31 to supply refrigerant to the first connection part 141 and the second connection part 143.

[0099] The first side surface flow path 311 can include an upper flow path 311a connected to the first pipeline 141b and a lower flow path 311b connected to the second pipeline 143b.

[0100] The upper flow path 311a can be a part configured to introduce refrigerant (or coolant), and can be formed by dividing (or separating) a part of the inside of the composite frame 31. The upper flow path 311a can be connected to the first pipeline 141b to be able to supply refrigerant.

[0101] The lower flow path 311b can be inside the composite frame 31 below the upper flow path 311a, and can be configured to provide a space through which the refrigerant flowing along the discharge flow path 23 can be discharged.

[0102] In one or more embodiments, a gas discharge part 313 for discharging the gas generated from the battery cell 11 can be inside the composite frame 31.

[0103] The gas discharge part 313 can include: a gas inflow part 312, on the first side surface of the composite frame 31, and the gas generated from the battery cell 11 is introduced through the gas inflow part 312; and a gas discharge part 314, at the composite frame 31, and the gas introduced through the gas inflow part 312 is discharged to the outside through the gas discharge part 314.

[0104] The gas inflow part 312 can be at the first side surface where one of the battery cells 11 contacts the upper side surface of the first side surface flow path 311 in the composite frame 31, and the gas inflow part 312 can be a gas inflow hole passing through a part of the first side surface.

[0105] The inside of the composite frame 31 can be divided into a first region "a" and a second region "b", as Figure 7 shown. The first side surface flow path 311 can be at the first region "a", and the gas discharge part 314 can be at the second region "b".

[0106] The gas discharge portion 314 may include: a discharge unit (or discharge portion) 315 that protrudes from the second side surface of the composite frame 31 facing the first side surface to discharge gas; and a guiding portion (or guiding part) 316 that protrudes from the inner wall surface of the second region b inside the composite frame 31 to guide gas toward the discharge unit 315. The guiding portion 316 may be around the discharge unit 315 (e.g., surrounding the discharge unit 315).

[0107] The discharge unit 315 may be detachably coupled to the second side surface of the composite frame 31 and may be configured such that the gas discharged from the battery cell 11 and introduced into the gas inflow portion 312 can be easily discharged to the outside.

[0108] The discharge unit 315 may include a discharge main body 315a coupled to the second side surface of the composite frame 31 and a discharge protruding portion 315b that protrudes from the side surface of the discharge main body 315a into the second region b and has a discharge flow path formed therein.

[0109] The gas introduced through the gas inflow portion 312 may be guided by the guiding portion 316 to pass through the discharge protruding portion 315b, so that the gas is discharged to the outside.

[0110] The guiding portion 316 may protrude inside the composite frame 31 at the position where the discharge unit 315 is located.

[0111] The guiding portion 316 may protrude obliquely from the inner wall surface of the composite frame 31 into the second region b at the position where the discharge unit 315 is located. The guiding portion 316 is configured such that the gas introduced through the gas inflow portion 312 can easily move to the discharge unit 315.

[0112] The guiding portion 316 may protrude from the inner wall surface of the composite frame 31, and the discharge protruding portion 315b is inside the guiding portion 316. The guiding portion 316 may be or include a tapered guiding protrusion having an open end portion. The guiding portion 316 may taper in a direction extending away from the inner wall surface where the discharge unit 315 of the composite frame 31 is located.

[0113] In one or more embodiments, the end frame 33 may be coupled to another edge of the base plate 10.

[0114] The first side frame 35 may be configured such that both ends of the first side frame 35 are connected to one end of each of the composite frame 31 and the end frame 33.

[0115] Both ends of the second side frame 37 may be connected to the other end of each of the composite frame 31 and the end frame 33.

[0116] In one or more embodiments, a side surface cooling frame 40 that contacts side surfaces of a plurality of battery cells 11 may be provided along at least a portion of the frame portion 30.

[0117] Figure 10 To schematically show a perspective view of the side surface cooling frame 40 according to a first embodiment of the present disclosure, Figure 11 To schematically show Figure 10 a state in which a first plug, a second plug, and a side surface refrigerant guiding portion of the side surface cooling frame 40 are separated, and Figure 12 To schematically show Figure 10 a cross-sectional view of the side surface cooling frame 40.

[0118] As Figures 1 to 12 shown, the assembly may include a plurality of side surface cooling frames 40 spaced apart from each other at the frame portion 30, and the side surface cooling frame 40 may be configured to cool the battery cells 11 by contacting side surfaces of the plurality of battery cells 11 accommodated in the frame portion 30.

[0119] One side of the side surface cooling frame 40 may be connected to a first side surface flow path 311 of the composite frame 31, the other side of the side surface cooling frame 40 may extend in a direction toward the end frame 33, and a second side surface flow path 41 through which refrigerant flows may be inside the side surface cooling frame 40.

[0120] The second side surface flow path 41 may include a side surface upper flow path 41a and a side surface lower flow path 41b. The side surface upper flow path 41a extends in the length direction (y-axis direction) inside the side surface cooling frame 40 and is connected to an upper flow path 311a of the composite frame 31. The side surface lower flow path 41b is inside the side surface cooling frame 40 and extends in the length direction (y-axis direction) below the side surface upper flow path 41a to be connected to a lower flow path 311b of the composite frame 31.

[0121] In one or more embodiments, refrigerant may be supplied from the frame portion 30 to the side surface upper flow path 41a to circulate in the side surface lower flow path 41b.

[0122] A first plug 43 that connects the side surface upper flow path 41a to the upper flow path 311a of the composite frame 31 and a second plug 45 that connects the side surface lower flow path 41b to the lower flow path 311b of the composite frame 31 may be installed on one side of the side surface cooling frame 40.

[0123] The first plug 43 can pass through the side surface of the composite frame 31 to connect to the upper flow path 311a. In one or more embodiments, the refrigerant flowing along the upper flow path 311a of the composite frame 31 can be introduced through the first plug 43 into the side surface flow path 41a on the side surface of the side surface cooling frame 40.

[0124] The second plug 45 can pass through the side surface of the composite frame 31 to connect to the lower flow path 311b. In one or more embodiments, the refrigerant flowing through the side surface lower flow path 41b can be introduced through the second plug 45 into the lower flow path 311b.

[0125] In one or more embodiments, the side surface refrigerant guiding portion 47 can be at the other side of the side surface cooling frame 40.

[0126] The side surface refrigerant guiding portion 47 can be coupled to the other side of the side surface cooling frame 40 in a plate shape and can be configured to contact each of the side surface upper flow path 41a and the side surface lower flow path 41b.

[0127] In one or more embodiments, the refrigerant can be introduced from the side surface upper flow path 41a to impact the side surface refrigerant guiding portion 47, so that the flow direction of the refrigerant is changed. In this way, the refrigerant can be circulated to the side surface lower flow path 41b.

[0128] As described above, in a configuration where a plurality of battery cells 11 including battery cells are accommodated in the frame portion 30, the battery pack 100 of the present embodiment can effectively cool three surfaces of the bottom and side surfaces of the battery cells 11. Cooling the battery cells 11 is configured to extend the service life of the battery pack and improve the durability of the battery pack.

[0129] Figure 13 To schematically show a perspective view of a battery pack according to a second embodiment of the present disclosure, Figure 14 To schematically show Figure 13 the exploded perspective view of the battery pack, and Figure 15 To schematically show Figure 13 the plan view of the base plate. The same reference numerals as those in Figures 1 to 12 represent the same or similar components having the same or similar functions. Hereinafter, the detailed description of the same reference numerals is omitted.

[0130] As Figures 13 to 15As shown, the base plate 110 of the battery pack 200 according to the second embodiment of the present disclosure may include a cooling plate 112, where a plurality of battery cells 11 are in contact with the first surface of the cooling plate 112. A base flow path 120 is formed in the cooling plate 112. A flow path connection portion 114 is coupled to one end of the cooling plate 112, and is connected to the first side surface flow path 311 (see Figure 16 ) of the connection frame portion 30 and the base flow path 120. A refrigerant guiding portion 16 is coupled to the other end of the cooling plate 112, and is configured to guide the refrigerant introduced into the base flow path 120 to flow through the flow path connection portion 114 in the discharge direction.

[0131] The base flow path 120 may include an inflow flow path 121, through which the refrigerant flows inward (or is introduced) through the flow path connection portion 114 and flows inside the cooling plate 112 in a first direction (e.g., the y-axis direction). The base flow path 120 further includes a discharge flow path 123, where the flow direction of the refrigerant introduced through the inflow flow path 121 changes at the position of the refrigerant guiding portion 16 to move in a second direction, which is the opposite direction of the first direction (i.e., the reverse direction).

[0132] The inflow flow path 121 may include a first inflow flow path 121a that extends along one side inside the cooling plate 112 in the first direction to introduce the refrigerant and is connected to the discharge flow path 123, and a second inflow flow path 121b that extends along the other side inside the cooling plate 112 in the first direction to introduce the refrigerant and is connected to the discharge flow path 123.

[0133] The first inflow flow path 121a may extend along one edge of the cooling plate 112, may be longitudinally arranged inside the cooling plate 112 in the first direction, and may be configured such that the refrigerant introduced through the flow path connection portion 114 flows in the first direction (i.e., the y-axis direction).

[0134] The first inflow flow path 121a may be connected to the discharge flow path 123 inside the cooling plate 112 to enable the circulation of the refrigerant C.

[0135] The second inflow flow path 121b may extend along the other edge of the cooling plate 112, may be longitudinally arranged inside the cooling plate 112 in the first direction, and may be configured such that the refrigerant introduced through the flow path connection portion 114 flows in the first direction.

[0136] The second inflow flow path 121b may be connected to the discharge flow path 123 inside the cooling plate 112 to enable the circulation of the refrigerant C.

[0137] The discharge flow path 123 may be inside the cooling plate 112 and may be connected to each of the first inflow flow path 121a and the second inflow flow path 121b at the position of the refrigerant guiding portion 16 so that the refrigerant C can circulate.

[0138] In one or more embodiments, the discharge flow path 123 may include a first discharge flow path 123a and a second discharge flow path 123b that are inside the cooling plate 112 and between the first inflow flow path 121a and the second inflow flow path 121b.

[0139] The first discharge flow path 123a may extend along a first direction inside the cooling plate 112 between the first inflow flow path 121a and the second inflow flow path 121b, and the first discharge flow path 123a may be connected to the first inflow flow path 121a to circulate and discharge the refrigerant.

[0140] The second discharge flow path 123b may extend along a first direction inside the cooling plate 112 between the first inflow flow path 121a and the second inflow flow path 121b, and the second discharge flow path 123b may be connected to the second inflow flow path 121b to circulate and discharge the refrigerant.

[0141] In one or more embodiments, the refrigerant C may be introduced through the first inflow flow path 121a and the second inflow flow path 121b such that the flow direction of the refrigerant changes (e.g., reverses) at the position of the refrigerant guiding portion 16 to circulate and discharge the refrigerant through the first discharge flow path 123a and the second discharge flow path 123b.

[0142] Figure 16 is a cross-sectional view taken along line C-C, and schematically shows the state in which the composite frame and the base plate are connected by the flow path connection portion, and Figure 13 is a cross-sectional view taken along line D-D. Figure 17 is along Figure 13 of line D-D.

[0143] Referring to Figure 16 and Figure 17 the flow path connection portion 114 may include a first connection portion 141 that is coupled to one end of the cooling plate 112 to connect the first inflow flow path 121a and the second inflow flow path 121b to the first side surface flow path 311 of the composite frame 31 of the frame portion 30. The flow path connection portion 114 may further include a second connection portion 143 that is coupled to one end of the cooling plate 112 to connect the first discharge flow path 123a and the second discharge flow path 123b to the first side surface flow path 311 of the frame portion 30.

[0144] The first connection part 141 can be coupled to the first coupling groove 12a at the first inflow flow path 121a and the second inflow flow path 121b inside the cooling plate 112, so that the first connection part 141 is connected to the upper flow path 311a of the composite frame 31.

[0145] The first connection part 141 may include a first bent plate 141a and a first pipeline 141b. One side of the first bent plate 141a covers the first coupling groove 12a and the other side is bent to extend in the thickness direction (Z-axis direction) of the cooling plate 112. The first pipeline 141b protrudes upward from the first bent plate 141a and extends into the composite frame 31 to connect the first inflow flow path 121a and the second inflow flow path 121b to the upper flow path 311a.

[0146] One side of the first bent plate 141a may cover the first coupling groove 12a at each of the first inflow flow path 121a and the second inflow flow path 121b, and the other side of the first bent plate 141a may be bent downward to extend in the thickness direction (Z-axis direction) of the cooling plate 112.

[0147] The first pipeline 141b may protrude upward from the upper side of the first bent plate 141a and extend into the frame part 30, so that the first pipeline 141b connects the first inflow flow path 121a and the second inflow flow path 121b to the first side surface flow path 311 of the composite frame 31.

[0148] The second connection part 143 can be coupled to one end of the cooling plate 112 to connect the first discharge flow path 123a and the second discharge flow path 123b to the lower flow path 311b of the composite frame 31.

[0149] The second connection part 143 may include a second bent plate 143a and a second pipeline 143b. One side of the second bent plate 143a covers the first coupling groove 12a and the other side is bent downward to extend in the thickness direction (Z-axis direction) of the cooling plate 112. The second pipeline 143b protrudes upward from the second bent plate 143a and extends into the composite frame 31 to connect the first discharge flow path 123a and the second discharge flow path 123b to the lower flow path 311b of the composite frame 31.

[0150] One side of the second bent plate 143a may cover the first coupling groove 12a formed at each of the first discharge flow path 123a and the second discharge flow path 123b, and the other side of the second bent plate 143a may be bent downward to extend in the thickness direction (Z-axis direction) of the cooling plate 112.

[0151] The second pipeline 143b can protrude upward from the upper side of the second bent plate 143a and extend into the frame portion 30. The second pipeline 143b can connect the first discharge flow path 123a and the second discharge flow path 123b to the lower flow path 311b of the first side surface flow path 311.

[0152] Figure 18 To schematically show a perspective view of a battery pack according to a third embodiment of the present disclosure, Figure 19 To schematically show Figure 18 an exploded perspective view of the battery pack Figure 20 To schematically show Figure 18 a plan view of the base plate Figure 21 To be taken along Figure 18 line F-F and schematically show a cross-sectional view of the composite frame and the base plate connected by the flow path connection portion, and Figure 22 To be taken along Figure 18 line E-E. Reference numerals identical to those in Figures 1 to 17 denote identical or similar components having the same or similar functions. In the following, detailed descriptions of the same reference numerals are omitted.

[0153] As Figures 18 to 22 shown in, the base plate 210 of the battery pack 300 according to the third embodiment of the present disclosure may include a cooling plate 212, where a plurality of battery cells are in contact with a first surface of the cooling plate 212. A base flow path 220 is formed in the cooling plate 212. A flow path connection portion 14 is coupled to one end of the cooling plate 212 and connects the first side surface flow path 311 of the frame portion 30 and the base flow path 220. A refrigerant guiding portion 16 is coupled to the other end of the cooling plate 212 and is configured to guide the refrigerant introduced into the base flow path 220 to flow through the flow path connection portion 14 in the discharge direction.

[0154] The base flow path 220 may include an inflow flow path 221, a common inflow flow path 222, and a discharge flow path 223.

[0155] The inflow flow path 221 may be configured such that a first inflow flow path 221a, a second inflow flow path 221b, and the common inflow flow path 222 extend inside the cooling plate 212 along a first direction (i.e., the longitudinal direction in the y-axis direction) and are spaced apart from each other in the x-axis direction.

[0156] The first inflow flow path 221a may extend inside one edge portion of the cooling plate 212 along the first direction such that the refrigerant can be introduced, and the first inflow flow path 221a may be connected to the discharge flow path 223.

[0157] The second inflow flow path 221b may extend along a first direction inside an edge portion on the other side of the cooling plate 212 such that refrigerant may be introduced, and the second inflow flow path 221b may be connected to the discharge flow path 223.

[0158] The common inflow flow path 222 may include two flow paths that are formed inside the cooling plate 212 along a first direction (y-axis direction) between the first inflow flow path 221a and the second inflow flow path 221b and that move refrigerant. The common inflow flow path 222 may be connected to the discharge flow path 223.

[0159] The common inflow flow path 222 may include a first common inflow flow path 222a that extends along a first direction inside the cooling plate 212 between the first inflow flow path 221a and the second inflow flow path 221b and that is connected to a first common discharge flow path 223a, which will be described later. The common inflow flow path 222 may also include a second common inflow flow path 222b that extends along a first direction inside the cooling plate 212 parallel to or substantially parallel to the first common inflow flow path 222a and that is connected to a second common discharge flow path 223b, which will be described later.

[0160] In one or more embodiments, a portion of the refrigerant introduced through the common inflow flow path 222 may flow through the first common inflow flow path 222a to circulate to the first common discharge flow path 223a.

[0161] A portion of the remaining refrigerant introduced through the common inflow flow path 222 may flow through the second common inflow flow path 222b to circulate through the second common discharge flow path 223b.

[0162] The discharge flow path 223 may be connected to an inflow flow path between the first inflow flow path 221a, the second inflow flow path 221b, and the common inflow flow path 222 to circulate refrigerant.

[0163] The discharge flow path 223 may include a first common discharge flow path 223a inside the cooling plate 212 between the first inflow flow path 221a and the common inflow flow path 222, and a second common discharge flow path 223b inside the cooling plate 212 between the common inflow flow path 222 and the second inflow flow path 221b.

[0164] The first common discharge flow path 223a may extend inside the cooling plate 212 along a first direction and may be connected to each of the first inflow flow path 221a and the common inflow flow path 222 such that the refrigerant flowing through each of the first inflow flow path 221a and the common inflow flow path 222 circulates and is discharged.

[0165] In one or more embodiments, the first common discharge flow path 223a may include a first output flow path 223a1 and a second output flow path 223a2. The first output flow path 223a1 is inside the cooling plate 212 between the first inflow flow path 221a and the common inflow flow path 222 and is connected to the first inflow flow path 221a to discharge the refrigerant. The second output flow path 223a2 is inside the cooling plate 212 on a side surface of the first output flow path 223a1 and is connected to the first common inflow flow path 222a to discharge the refrigerant.

[0166] In one or more embodiments, the refrigerant introduced through the first inflow flow path 221a may be discharged through the first output flow path 223a1. The refrigerant introduced through the first common inflow flow path 222a may be discharged through the second output flow path 223a2.

[0167] The second common discharge flow path 223b may extend inside the cooling plate 212 between the common inflow flow path 222 and the second inflow flow path 221b along the first direction (y-axis direction), and may be connected to each of the common inflow flow path 222 and the second inflow flow path 221b such that the refrigerant flowing through each of the common inflow flow path 222 and the second inflow flow path 221b circulates and is discharged.

[0168] The second common discharge flow path 223b may include a third output flow path 223b1 and a fourth output flow path 223b2. The third output flow path 223b1 is inside the cooling plate 212 between the second inflow flow path 221b and the common inflow flow path 222 and is connected to the second common inflow flow path 222b to discharge the refrigerant. The fourth output flow path 223b2 is inside the cooling plate 212 on a side surface of the third output flow path 223b1 and is connected to the second inflow flow path 221b to discharge the refrigerant.

[0169] In one or more embodiments, the refrigerant introduced through the second common inflow flow path 222b may be discharged through the third output flow path 223b1. The refrigerant introduced through the second inflow flow path 221b may be discharged through the fourth output flow path 223b2.

[0170] In one or more embodiments, the flow path connection portion 14 may include a first connection portion 141 and a second connection portion 143. The first connection portion 141 is coupled to one end of the cooling plate 212 to connect the first inflow flow path 221a, the second inflow flow path 221b, and the common inflow flow path 222 to the side surface flow path of the frame portion 30. The second connection portion 143 is coupled to one end of the cooling plate 212 to connect the first common discharge flow path 223a and the second common discharge flow path 223b to the side surface flow path of the frame portion 30.

[0171] The first coupling groove 12a for coupling the first connection portion 141 and the second connection portion 143 may be at one side of each of the first inflow flow path 221a, the second inflow flow path 221b, the common inflow flow path 222, the first common discharge flow path 223a, and the second common discharge flow path 223b.

[0172] The first connection portion 141 may include a first bent plate 141a. One side of the first bent plate 141a covers the first coupling groove 12a at the first inflow flow path 221a, the second inflow flow path 221b, and the common inflow flow path 222, and the other side is bent downward in the thickness direction (Z-axis direction) of the cooling plate 112. The first pipeline 141b protrudes upward from the first bent plate 141a and extends into the interior of the composite frame 31, and connects the first inflow flow path 221a, the second inflow flow path 221b, and the common inflow flow path 222 to the first side surface flow path 311 of the composite frame 31.

[0173] The first bent plate 141a may be coupled to each of the first inflow flow path 221a, the second inflow flow path 221b, and the common inflow flow path 222, and the first pipeline 141b may be coupled to the upper portion of the first bent plate 141a.

[0174] The first pipeline 141b is configured to enable the refrigerant to be circulated and supplied by connecting the first inflow flow path 221a, the second inflow flow path 221b, and the common inflow flow path 222 to the first side surface flow path 311 of the composite frame 31.

[0175] The second connection portion 143 may include a second bent plate 143a. One side of the second bent plate 143a covers the first coupling groove 12a, and the other side is bent downward and extends in the thickness direction (Z-axis direction) of the cooling plate. The second pipeline 143b protrudes upward from the second bent plate 143a and extends into the interior of the composite frame 31 to connect the first common discharge flow path 223a and the second common discharge flow path 223b to the first side surface flow path 311.

[0176] The second bent plate 143a can be coupled to the first coupling groove 12a at each of the first common discharge flow path 223a and the second common discharge flow path 223b, and the second pipeline 143b can extend upward from the upper portion of the second bent plate 143a.

[0177] The second coupling groove 12b for coupling the refrigerant guiding portion 16 can be at the other side of each of the first inflow flow path 221a and the second inflow flow path 221b, the common inflow flow path 222, the first common discharge flow path 223a, and the second common discharge flow path 223b.

[0178] As described above, in the configuration in which a plurality of battery cells 11 including battery cells are accommodated in the frame portion, the battery pack 300 of the third embodiment of the present disclosure can effectively cool three surfaces of the bottom and side surfaces of the battery cells 11. Cooling the battery cells 11 is configured to extend the service life of the battery pack and improve the durability of the battery pack.

[0179] Although the present disclosure has been described in connection with embodiments that are currently considered to be practical, it will be understood that the present disclosure is not limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.

[0180] <Explanation of Reference Numerals>

[0181] 10, 110: Base plate 1: Battery cell

[0182] 12, 112: Cooling plate 12a: First coupling groove

[0183] 12b: Second coupling groove 14, 114: Flow path connection portion

[0184] 141: First connection portion 141a: First bent plate

[0185] 141b: First pipeline 141c: First sealing member

[0186] 143: Second connection portion 143a: Second bent plate

[0187] 143b: Second pipeline 143c: Second sealing member

[0188] 16: Refrigerant guiding portion 20, 120, 220: Base flow path

[0189] 21, 121, 221: Inflow flow path 121a: First inflow flow path

[0190] 121b: Second inflow flow path 222: Common inflow flow path

[0191] 222a: First common inflow flow path

[0192] 222b: Second common inflow flow path

[0193] 23, 123, 223: Discharge flow path 223a: First common discharge flow path

[0194] 223a1: First output flow path 223a2: Second output flow path

[0195] 223b: Second common discharge flow path 223b1: Third output flow path

[0196] 223b2: Fourth output flow path 123a: First discharge flow path

[0197] 123b: Second discharge flow path 30: Frame part

[0198] 31: Composite frame 33: End frame

[0199] 35: First side frame 37: Second side frame

[0200] 311: First side surface flow path 311a: Upper flow path

[0201] 311b: Lower flow path 312: Gas inflow part

[0202] 314: Gas discharge part 315: Discharge unit

[0203] 315a: Discharge body 315b: Discharge protruding part

[0204] 316: Guide part 40: Side surface cooling frame

[0205] 41: Second side surface flow path 41a: Side surface upper flow path

[0206] 41b: Side surface lower flow path 43: First plug

[0207] 45: Second plug 47: Side surface refrigerant guide part

Claims

1. A battery pack, characterized in that: include: Multiple battery cells; a base plate including a first surface and a base flow path, wherein the plurality of battery cells are in contact with the first surface, and the base flow path is configured to circulate a refrigerant to cool the plurality of battery cells; as well as A frame portion includes a plurality of frames connected to each other on the upper side of the first surface of the base plate, the frame portion having an accommodation space for accommodating the plurality of battery cells and a side surface flow path connected to the base flow path, and the refrigerant is configured to flow through the side surface flow path.

2. The battery pack according to claim 1, characterized in that: The base plate comprises: a cooling plate comprising said first surface and said substrate flow path; a flow path connecting portion coupled to one end of the cooling plate and connecting the side surface flow path of the frame portion and the base flow path; and A refrigerant guide portion is coupled to the other end of the cooling plate, the refrigerant guide portion being configured to guide the refrigerant introduced into the base flow path to flow through the flow path connection portion in a discharge direction.

3. The battery pack according to claim 2, characterized in that: The base flow path includes an inflow flow path, the refrigerant introduced through the flow path connection portion moves through the inflow flow path in a first direction inside the cooling plate, and an exhaust flow path, in which the flow direction of the refrigerant introduced through the inflow flow path is reversed at the position of the refrigerant guide portion to move in a second direction opposite to the first direction, The inflow flow path extends in the first direction inside the cooling plate to introduce the refrigerant, and is connected to the exhaust flow path at the position of the refrigerant guide portion, and The exhaust flow path is connected to the inflow flow path inside the cooling plate.

4. The battery pack according to claim 3, characterized in that: Further included is a first coupling groove coupled to the flow path connecting portion at the one end of the cooling plate, the first coupling groove opening a portion of each of the inflow flow path and the exhaust flow path.

5. The battery pack according to claim 4, characterized in that: The flow path connecting portion comprises: a first connection portion coupled to the one end of the cooling plate to connect the inflow flow path to the side surface flow path of the frame portion; and A second connection portion is coupled to the one end of the cooling plate to connect the exhaust flow path to the side surface flow path of the frame portion.

6. The battery pack according to claim 5, characterized in that: The first connection portion includes: a first bent plate including one side covering the first coupling groove and the other side extending in the thickness direction of the cooling plate; and a first pipeline protruding from an upper side of the first bent plate, extending into the frame portion, and connecting the inflow flow path and the side surface flow path, and The second connecting portion includes: a second bent plate, the second bent plate including one side covering the first connecting groove and the other side extending in the thickness direction of the cooling plate; and a second pipeline, the second pipeline protrudes from the upper side of the second bent plate, extends into the frame portion, and connects the exhaust flow path and the side surface flow path.

7. The battery pack according to claim 4, characterized in that: Further included is a second coupling groove at the other end of the cooling plate, the second coupling groove being coupled to the refrigerant guide portion and opening another portion of each of the inflow flow path and the exhaust flow path.

8. The battery pack according to claim 7, characterized in that: The refrigerant guide portion includes a second bent plate including one side covering the second coupling groove and the other side extending in a thickness direction of the cooling plate.

9. The battery pack according to claim 6, characterized in that: The framework part includes: a composite frame coupled to one edge of the base plate, wherein a first side surface flow path is inside the composite frame, and the first side surface flow path is connected to the first connection portion and the second connection portion to supply the refrigerant; an end frame coupled to the other edge of the base plate; a first side frame having both ends connected to one end of each of the composite frame and the end frame; and A second side frame, both ends of which are respectively connected to the other end of each of the composite frame and the end frame.

10. The battery pack according to claim 9, characterized in that: Further included in the composite frame is a gas exhaust portion configured to exhaust gas generated from one of the multiple battery cells, wherein the gas exhaust portion includes: a gas inflow portion, which is on a first side surface of the composite frame and through which the gas generated from the one of the multiple battery cells is introduced; and a gas exhaust portion, at the composite frame, through which the gas introduced into the gas inflow portion is discharged to the outside.

11. The battery pack according to claim 10, characterized in that: The interior of the composite frame is divided into a first region and a second region, wherein the first side surface flow path is at the first region, and wherein the gas discharge portion is at the second region.

12. The battery pack according to claim 11, characterized in that: The gas exhaust section includes: a discharge unit protruding from a second side surface of the composite frame facing the first side surface, the discharge unit being configured to discharge the gas; and A guide portion protrudes from an inner wall surface of the second region inside the composite frame, the guide portion being configured to guide the gas toward the discharge unit.

13. The battery pack according to claim 9, characterized in that: The frame portion further includes a side surface cooling frame in contact with side surfaces of the plurality of battery cells.

14. The battery pack according to claim 13, characterized in that: One side of the side surface cooling frame is connected to the first side surface flow path of the composite frame, wherein the other side of the side surface cooling frame extends in a direction toward the end frame, and wherein a second side surface flow path through which the refrigerant flows is inside the side surface cooling frame.

15. The battery pack according to claim 14, characterized in that: The first side surface flow path includes an upper flow path connected to the first pipeline and a lower flow path connected to the second pipeline, and wherein the second side surface flow path includes: an upper flow path on the side surface, extending in the length direction inside the side surface cooling frame and connected to the upper flow path of the composite frame; and a lower flow path on the side surface, extending in the length direction inside the side surface cooling frame and below the upper flow path on the side surface to be connected to the lower flow path of the composite frame.

16. The battery pack according to claim 15, characterized in that: Further included is a side surface refrigerant guide portion at the other side of the side surface cooling frame, wherein the side surface refrigerant guide portion is configured to change a flow direction of the refrigerant flowing through the upper flow path on the side surface to a direction of the lower flow path on the side surface.

17. The battery pack according to claim 3, characterized in that: The inflow flow path includes: a first inflow flow path extending along the first direction at one side of the cooling plate to introduce the refrigerant and connected to the exhaust flow path; and a second inflow flow path extending along the first direction at the other side of the cooling plate to introduce the refrigerant and connected to the exhaust flow path, and The exhaust flow path includes: a first exhaust flow path extending along the first direction between the first inflow flow path and the second inflow flow path inside the cooling plate and connected to the first inflow flow path to exhaust the refrigerant; and a second exhaust flow path extending along the first direction between the first inflow flow path and the second inflow flow path inside the cooling plate and connected to the second inflow flow path to exhaust the refrigerant.

18. The battery pack according to claim 17, characterized in that: The flow path connecting portion comprises: a first connection portion coupled to the one end of the cooling plate to connect the first inflow flow path and the second inflow flow path to the side surface flow path of the frame portion; and A second connection portion is coupled to the one end of the cooling plate to connect the first exhaust flow path and the second exhaust flow path to the side surface flow path of the frame portion.

19. The battery pack according to claim 3, characterized in that: The inflow flow path includes: a first inflow flow path extending along the first direction inside one edge portion of the cooling plate so that the refrigerant is introduced and connected to the exhaust flow path; a second inflow flow path extending along the first direction inside the edge portion on the other side of the cooling plate so that the refrigerant is introduced and connected to the exhaust flow path; and a common inflow flow path including two flow paths extending along the first direction inside the cooling plate between the first inflow flow path and the second inflow flow path and connected to the exhaust flow path, and The exhaust flow path includes: a first common exhaust flow path, which extends along the first direction inside the cooling plate between the first inflow flow path and the common inflow flow path, and is connected to each of the first inflow flow path and the common inflow flow path to exhaust the refrigerant; and a second common exhaust flow path, which extends along the first direction inside the cooling plate between the second inflow flow path and the common inflow flow path, and is connected to each of the second inflow flow path and the common inflow flow path to exhaust the refrigerant.

20. The battery pack according to claim 19, characterized in that: The flow path connecting portion comprises: a first connection portion coupled to the one end of the cooling plate to connect the first inflow flow path, the second inflow flow path, and the common inflow flow path to the side surface flow path of the frame portion; and A second connection portion is coupled to the one end of the cooling plate to connect the first common exhaust flow path and the second common exhaust flow path to the side surface flow path of the frame portion.

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