WO2024258005A1 - 온도편차가 개선되는 배터리 팩 - Google Patents
온도편차가 개선되는 배터리 팩 Download PDFInfo
- Publication number
- WO2024258005A1 WO2024258005A1 PCT/KR2024/003594 KR2024003594W WO2024258005A1 WO 2024258005 A1 WO2024258005 A1 WO 2024258005A1 KR 2024003594 W KR2024003594 W KR 2024003594W WO 2024258005 A1 WO2024258005 A1 WO 2024258005A1
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- WIPO (PCT)
- Prior art keywords
- side portion
- battery pack
- case
- bead
- cell module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a battery pack, and more particularly, to a battery pack capable of improving temperature deviation between battery cell assemblies inside the battery pack.
- Secondary batteries unlike primary batteries that cannot be recharged, are batteries that can be charged and discharged. They are used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) that are driven by electrical power sources.
- EVs electric vehicles
- HEVs hybrid electric vehicles
- the types of secondary batteries widely used today include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, and nickel zinc batteries.
- the operating voltage of these unit secondary battery cells i.e., unit battery cells, is approximately 2.5 V to 4.6 V. Therefore, when a higher output voltage is required, a battery pack is configured by connecting multiple battery cells in series. In addition, a battery pack is configured by connecting multiple battery cells in parallel depending on the charge/discharge capacity required for the battery pack. Therefore, the number of battery cells included in the battery pack can be set variously depending on the required output voltage or charge/discharge capacity.
- the present invention aims to provide a battery pack in which the temperature difference between battery cell assemblies (CMAs) is improved.
- the case further includes a second side portion arranged to face the first side portion.
- the case further includes an inlet passage through which cooling air flowing in from the air inlet moves, which is arranged on the inside of the first side portion of the case; and an outlet passage through which cooling air moves so that the cooling air is discharged to the exhaust port on the inside of the second side portion of the case.
- the air intake port is arranged on the third side portion, and the exhaust port is arranged on the fourth side portion.
- a plurality of the above cell module assemblies are arranged along the direction from the third side portion to the fourth side portion.
- the first bead is formed so that the entire thickness of the first side portion protrudes into the case.
- each of the cell module assemblies is positioned in front of the first bead.
- the first bead is positioned so as to face the space between the cell module assembly on the first side surface.
- first beads are arranged to correspond sequentially from the cell module assembly adjacent to the third side portion.
- the first bead is positioned within 1/2 of the length of the first side portion from one end of the first side portion connected to the third side portion.
- the number of the first beads is less than or equal to half the number of the cell module assembly.
- the first bead has a trapezoidal shape on a plane.
- the first bead has a triangular shape on a plane.
- the height of the first bead protruding from the first side gradually increases along the direction of movement of cooling air flowing in from the air inlet.
- the protrusion height of the first first bead from the air inlet from the first side portion is 15% to 25% of the distance between the first side portion and one end of the cell module assembly
- the protrusion height of the second first bead from the air inlet is 35% to 45% of the distance between the first side portion and one end of the cell module assembly
- the protrusion height of the third first bead from the air inlet is 55% to 65% of the distance between the first side portion and one end of the cell module assembly.
- the vertical height of the first bead in the first side portion gradually increases along the direction of movement of cooling air flowing in from the air inlet.
- the second side portion includes a plurality of second beads protruding from the second side portion into the case.
- the case further includes a third side portion arranged on the other side of the case; and a fourth side portion arranged to face the third side portion; and the second beads are arranged to correspond sequentially from the cell module assembly adjacent to the fourth side portion.
- the height of the second bead protruding from the second side gradually decreases in the direction opposite to the direction of movement of cooling air from the exhaust port.
- the second bead is positioned within 1/2 of the length of the second side portion from one end of the second side portion connected to the fourth side portion.
- the number of the second beads is less than or equal to half the number of the cell module assembly.
- the battery pack according to the present invention has the effect of improving the temperature difference between battery cell assemblies within the battery pack, thereby improving battery performance and extending battery life.
- the battery pack according to the present invention has a cost-saving effect due to the reduction in thickness resulting from the reinforcement of the rigidity of the case as well as the improvement of temperature deviation.
- FIG. 1 is a perspective view of a battery pack according to the first embodiment of the present invention.
- Figure 2 is an exploded perspective view of a battery pack according to the first embodiment of the present invention.
- Figure 3 is a rear perspective view of a battery pack according to the first embodiment of the present invention.
- Figure 4 is a rear view of a battery pack according to the first embodiment of the present invention.
- Figure 5 is an internal plan view of a battery pack according to the first embodiment of the present invention.
- Figure 6 is a partial detailed drawing of Figure 5.
- Figure 8 is an internal plan view of a battery pack according to a third embodiment of the present invention.
- Figure 9 is an internal plan view of a battery pack according to the fourth embodiment of the present invention.
- Fig. 10 is a detailed view of part of Fig. 9.
- Figure 11 is a back view of Figure 9,
- FIG. 12 is a diagram illustrating the temperature distribution simulation results of a battery pack according to the fourth embodiment of the present invention.
- FIG. 13 is a partial detailed view of a battery pack according to the fifth embodiment of the present invention.
- Figure 14 is a drawing showing various embodiments and comparative examples of the present invention.
- Figure 15 is a drawing showing the temperature distribution of the test example shown in Figure 14.
- Figure 16 is a graph showing the flow rate of each cell module assembly in the test example illustrated in Figure 14.
- FIG. 1 is a perspective view of a battery pack according to a first embodiment of the present invention
- FIG. 2 is an exploded perspective view of a battery pack according to the first embodiment of the present invention
- FIG. 3 is a rear perspective view of the battery pack according to the first embodiment of the present invention
- FIG. 4 is a rear view of the battery pack according to the first embodiment of the present invention
- FIG. 5 is an internal plan view of a battery pack according to the first embodiment of the present invention
- FIG. 6 is a partial detailed view of FIG. 5.
- a battery pack (1000) with improved temperature deviation according to the present invention includes a plurality of cell module assemblies (CMA; 100) and a case (200) that accommodates the plurality of cell module assemblies (100).
- a cell module assembly (100) accommodated in a battery pack (1000) is formed by including a plurality of battery cells (not shown), and in each cell module assembly (100), a plurality of battery cells can be arranged in close contact.
- Each battery cell may be, for example, a pouch-type battery cell.
- the cell module assembly (100) may include a plurality of battery cells that are mutually stacked or closely packed, and each battery cell may be provided with electrode leads at the front and/or rear ends, and may include a positive electrode lead at the front end and a negative electrode lead at the rear end.
- the plurality of battery cells may be arranged so as to be electrically connected to each other.
- the battery cells are not limited to pouch-shaped battery cells and may be composed of other shapes of battery cells, such as square battery cells.
- the cell module assembly (100) may be placed in an open form within the case (200) of the battery pack (1000) without an independent housing.
- the cell module assembly (100) may be in a form in which a plurality of cells are housed in a housing, and the cell module assembly (100) may be housed in individual housings and placed independently within the case (200) of the battery pack (1000).
- the above case (200) is intended to accommodate a plurality of cell module assemblies (100) and may include a lower surface (260), an upper surface (250), a first side surface (220), a second side surface (210), a third side surface (230), and a fourth side surface (240).
- the lower surface (260) of the case (200) forms the bottom of the case (200) in the form of a plate extending horizontally, and a plurality of cell module assemblies (100) can be arranged on the upper surface of the lower surface (260).
- a plurality of cell module assemblies (100) can be arranged at a predetermined interval from the third side portion (230) (arranged on the left side of the case (200) in FIG. 5) to the fourth side portion (240) (arranged on the right side of the case (200) in FIG. 5).
- the third side portion (230) and the fourth side portion (240) may form the left side and the right side of the case (200), respectively, in this embodiment, and the third side portion (230) and the fourth side portion (240) may be arranged on the left and right edges of the lower portion (260), respectively.
- the third side portion (230) of the case (200) may be formed in a rectangular plate shape, and an air supply port (201) may be arranged in the third side portion (230).
- the air supply port (201) is a place where cooling air for cooling the cell module assembly (100) arranged in the battery pack (1000) is introduced, and the cooling air introduced through the air supply port (201) may cool the cell module assembly (100) and then be discharged through an exhaust port (202) arranged in the fourth side portion (240) on the opposite side.
- the air intake port (201) is positioned at the rear portion where the third side portion (230) and the first side portion (220) are connected, and cooling air introduced through the air intake port (201) can move through the air intake passage (205) between the rear plate (120) and the first side portion (220), which will be described later.
- the fourth side portion (240) of the case (200) may be formed in a rectangular plate shape and may be arranged parallel to the third side portion (230).
- the length of the fourth side portion (240) may be the same as that of the third side portion (230), and an exhaust port (202) may be arranged in the fourth side portion (240).
- the exhaust port (202) is a place where cooling air for cooling the cell module assembly (100) is discharged from the battery pack (1000).
- the exhaust port (202) may be arranged in the front portion where the second side portion (210) is connected to the fourth side portion (240), and as shown in the drawing, the exhaust port (202) may be arranged diagonally from the air supply port (201) arranged in the third side portion (230).
- the cooling air that cools the cell module assembly (100) can move through the exhaust passage (206) between the front plate (110) and the second side portion (210) described below and then be discharged through the exhaust port (202).
- a fan (not shown) may be placed in the exhaust port (202). Accordingly, cooling air introduced through the supply port (201) may be discharged through the exhaust port (202) by the fan placed in the exhaust port (202).
- cooling air may be introduced into the case (200) by a fan, in which case the exhaust port (202) may become an intake port and the intake port (201) may become an exhaust port.
- the fan may be placed in the intake port (201) instead of the exhaust port (202) as another embodiment.
- cooling air may be drawn into the battery pack from the outside by the fan, and cooling air inside the battery pack may be exhausted to the outside by the fan.
- first side portion (220) and the second side portion (210) may form the rear and front sides of the case (200) in this embodiment, respectively (see FIG. 5).
- the first side portion (220) and the second side portion (210) may be arranged at the rear and front edges of the lower portion (260), respectively.
- the second side portion (210) may be arranged parallel to the first side portion (220) so as to face each other, and the length of the second side portion (210) may be the same as the length of the first side portion (220).
- a front plate (110) may be arranged spaced inwardly from the second side portion (210) and parallel to the second side portion (210), as shown, and a rear plate (120) may be arranged spaced inwardly from the first side portion (220) and parallel to the first side portion (220).
- Each cell module assembly (100) is placed between a front plate (110) and a rear plate (120), and one end of each cell module assembly (100) can be placed on the rear plate (120) and the other end of each cell module assembly (100) can be placed on the front plate (110).
- the front plate (110) may have a plurality of openings (111) so that the other end of each cell module assembly (100) communicates with the space between the front plate (110) and the second side portion (210), and the rear plate (120) may have a plurality of openings so that one end of each cell module assembly (100) communicates with the space between the rear plate (120) and the first side portion (220).
- an inflow passage (205) through which cooling air flowing in from the air inlet (201) moves can be formed between the first side portion (220) and the rear plate (120) (one end of the cell module assembly (100)), and an outflow passage (206) can be formed between the second side portion (210) and the front plate (110) (the other end of the cell module assembly (100)).
- the cooling air can move through the inlet passage (205) between the first side portion (220) and the rear plate (120) (one end of the cell module assembly (100)), pass through each cell module assembly (100) through the opening of the rear plate (120), and then move through the opening (111) of the front plate (110) to the outlet passage (206) between the second side portion (210) and the front plate (110) (the other end of the cell module assembly (100)) and then be discharged through the exhaust port (202).
- the electrode leads (positive/negative leads) of the battery cells can be electrically connected to the front plate (110) and the rear plate (120), respectively.
- first side portion (220), the second side portion (210), the third side portion (230), and the fourth side portion (240) of the case (200) can form the side surface of the case (200).
- An upper surface (250) is arranged on the upper part of the case (200), and the upper surface (250) is arranged above the battery cell assembly (100) in the form of a plate extending horizontally, and a first side surface (220), a second side surface (210), a third side surface (230), and a fourth side surface (240) are connected to edges of the upper surface (250).
- the upper surface (250) may be formed integrally with the first side surface (220) and the second side surface (210).
- case (200) is depicted as having a square box shape as shown, but is not limited thereto and may be configured in various shapes, including polygons.
- a plurality of beads (300, 350) may be arranged on the inner side of the first side portion (220) and/or the second side portion (210) of the case (200).
- FIG. 5 is an internal plan view of a battery pack (1000) according to a first embodiment of the present invention.
- the first embodiment of the present invention six cell module assemblies (100) are arranged, and three first beads (300) may be arranged on the inside of the first side portion (220) of the case (200).
- the first beads (300) may be arranged within 1/2 of the length (L) of the first side portion (220) from one end of the first side portion (220) connected to the third side portion (230) to the other end of the first side portion (220) connected to the fourth side portion (240), and the number of first beads (300) may be 1/2 or less of the number of cell module assemblies (100).
- the first bead (300) is intended to improve the temperature difference between the cell module assemblies (100) inside the pack.
- the first bead (300) is formed to protrude from the first side portion (220) toward the cell module assemblies (100), and three first beads (300) can be arranged along the direction of movement of cooling air at one end of the first side portion (220) adjacent to the air supply port (201).
- the first bead (300) may be arranged on the first side portion (220) to correspond to each of the three cell module assemblies (100) adjacent to the air inlet (201) (or the third side portion (230)). As illustrated, each first bead (300) may be arranged at a position corresponding to the center of one end of each cell module assembly (100).
- the entire thickness of the first side portion (220) can be formed to protrude into the case (200), and can have a trapezoidal shape in a plane as shown in FIGS. 5 and 6.
- the first bead (300) may include two inclined surfaces (300a) bent from the first side surface (220) and a protruding end (300b) connecting the two inclined surfaces (300a).
- the longer side may be positioned on the same plane as the first side portion (220), and the shorter side may correspond to the protruding end portion (300b) of the first bead (300).
- the inclination angle ( ⁇ ) of the inclined surface portion (300a) with respect to the first side portion (220) of the first bead (300) may form an obtuse angle, and specifically, may be within a range of 130 to 140 degrees or approximately 135 degrees. That is, the inclined surface portion (300a) may form a range of 40 to 50 degrees or approximately 45 degrees with respect to the long side of the trapezoid.
- the protruding end portion (300b) is formed as a plane connecting the ends of the two inclined surfaces (300a) to each other and can be formed parallel to the first side portion (220).
- cooling air introduced through the air inlet (201) moves in a straight line and then moves along the inclined surface (300a) so that the cooling air can be guided to each cell module assembly (100).
- the height (D) at which the first bead (300) protrudes from the first side portion (220) may be within about 25 to 35% of the gap between the first side portion (220) and the rear plate (120), or may be within about 55 to 65%.
- the protruding height of the first bead (300) may be within about 7.5 mm, or may be within about 15 mm.
- three identical first beads (300) may be arranged, and the protruding heights (D) of the first beads (300) may be the same.
- the vertical height (H) between the top and bottom of the first bead (300) in the first side portion (220) may be 50 to 100%, 60 to 90%, or 70 to 80% of the height of the first side portion (220).
- cooling air moves through the inlet passage (205) between the rear plate (120) and the first side portion (220), passes through each cell module assembly (100) through the opening of the rear plate (120), then moves through the opening (111) of the front plate (110) to the outlet passage (206) between the front plate (110) and the second side portion (210), and is then discharged through the exhaust port (202).
- a small amount of cooling air is introduced into the cell module assembly (100) positioned adjacent to the supply port (201), which reduces the cooling efficiency.
- the first bead (300) is arranged on the first side portion (220), thereby reinforcing the rigidity of the pack and reducing the case thickness due to the reinforcing rigidity, thereby achieving a cost reduction effect.
- cooling air is smoothly induced to the cell module assembly (100) adjacent to the air inlet (201), thereby reducing the temperature difference between the cell module assembly (100), thereby improving the quality of the battery pack and the battery life.
- Figure 7 is a rear view of a battery pack (1000) according to the second embodiment of the present invention.
- a difference between the battery pack (1000) according to the second embodiment of the present invention and the first embodiment is that in the first embodiment, the vertical height (H) between the upper and lower ends of the first beads (300) in the first side portion (220) is the same for all three first beads (300), but in the second embodiment, the vertical heights (H) of the three first beads (300) are different from each other.
- the upper and lower height (H) of the first bead (300) in the first side portion (220) can be formed to gradually increase along the direction of movement of the cooling air from one end of the first side portion (220) adjacent to the air supply port (201).
- the vertical height (H) of the second first bead (300) can be increased by 10 to 20% more compared to the first first bead (300) (located at the far right in FIG. 7) closest to the air inlet (201), and the vertical height (H) of the third first bead (300) furthest from the air inlet (201) can be increased by 20 to 30% more compared to the first first bead (300).
- the upper and lower heights (H) of the first bead (300) are formed to gradually increase along the direction of movement of cooling air from the air inlet (201), thereby preventing excessive cooling air from flowing into the first cell module assembly (100) corresponding to the first bead (300) and efficiently distributing the cooling air to reduce temperature deviation.
- Figure 8 is an internal plan view of a battery pack (1000) according to a third embodiment of the present invention.
- a difference between the battery pack (1000) according to the third embodiment of the present invention and the first embodiment is that in the first embodiment, the first bead (300) is placed only on the first side portion (220), but in the third embodiment, it is placed also on the second side portion (210).
- six cell module assemblies (100) are arranged inside a case (200), three first beads (300) are arranged inside a first side portion (220) of the case (200), and three second beads (350) identical to the first beads (300) can be arranged inside a second side portion (210).
- the size of the second beads (350) can be identical to the first beads (300).
- the three second beads (350) arranged on the second side portion (210) are, like the first beads (300), intended to improve the temperature difference between the cell module assemblies (100).
- the configuration of the second beads (350) is the same as that of the first beads (300).
- the second beads (350) are formed to protrude from the second side portion (210) toward the cell module assemblies (100).
- the three second beads (350) are arranged along the opposite direction of the direction of movement of the cooling air at one end of the second side portion (210) adjacent to the exhaust port (202), and can be arranged to correspond to each of the three cell module assemblies (100) adjacent to the exhaust port (202).
- the second bead (350) is formed so that the entire thickness of the second side portion (210) protrudes toward the inside of the case (200), similar to the first bead (300), and may have a trapezoidal shape in a plane.
- the long side may be positioned on the same plane as the second side portion (210), and the short side may be positioned at the protruding end of the second bead (350).
- the cooling air that cools the cell module assembly (100) can move along the discharge passage (206) and then be guided to each cell module assembly (100) along the inclined side of the trapezoid.
- the height of the second bead (350) protruding from the second side portion (210) may be the same as that of the first bead (300).
- the second bead (350) may be within about 25 to 35% of the gap between the first side portion (220) and the other end (front plate (110)) of the cell module assembly (100), or may be within about 55 to 65%.
- the protruding height of the second bead (350) may be about 7.5 mm or about 15 mm.
- the protruding heights of three second beads (350) may be the same.
- the second bead (350) may be positioned within 1/2 of the length of the second side portion (210) from one end of the second side portion (210) connected to the fourth side portion (240) (the length from the other end of the second side portion (210) connected to the third side portion (230)), and the number of the second beads (350) may be 1/2 or less than 1/2 of the number of the cell module assembly (100).
- the first bead (300) may be arranged on the first side portion (220) adjacent to the intake port (201) in the number of cell module assemblies (100) corresponding to half of the total
- the second bead (350) may be arranged on the second side portion (210) adjacent to the exhaust port (202) in the number of cell module assemblies (100) corresponding to the remaining half.
- the cooling air is smoothly induced to the cell module assembly (100) adjacent to the inlet (201) by the first bead (300) of the first side portion (220), and additionally, as cooling air moves through the outlet passage (206) between the front plate (110) and the second side portion (210), the cooling air can be induced to the cell module assembly (100) adjacent to the exhaust port (202) by the second bead (350) of the second side portion (210) before being discharged through the exhaust port (202), so that the temperature difference between the cell module assemblies (100) can be further reduced.
- FIG. 9 is a plan view of the inside of a battery pack according to the fourth embodiment of the present invention
- FIG. 10 is a detailed view of part of FIG. 9
- FIG. 11 is a back view of FIG. 9
- FIG. 12 is a drawing showing the results of a temperature distribution simulation of a battery pack according to the fourth embodiment of the present invention.
- the first first bead (300) most adjacent to the air inlet (201) may have a height (D) protruding from the first side portion (220) within about 15 to 25% of the distance between the first side portion (220) and one end of the cell module assembly (100) (or the rear plate (120))
- the second first bead (300) may have a height (D) protruding from the first side portion (220) within about 35 to 45% of the distance between the first side portion (220) and one end of the cell module assembly (100) (or the rear plate (120)
- the third first bead (300) may have a height (D) protruding from the first side portion (220) within about 55 to 65% of the distance between the first side portion (220) and one end of the cell module assembly (100) (or the rear plate (120)).
- the first first bead (300) may be approximately 5 mm
- the second first bead (300) may be approximately 10 mm
- the third first bead (300) may be approximately 15 mm.
- the left-right width of the first bead (300) on the first side portion (220) may be formed to gradually increase along the direction of movement of the cooling air.
- the height (D) protruding from the first side portion (220) of the first bead (300) is arranged to gradually increase, thereby preventing excessive cooling air from flowing in toward the first cell module assembly (100) corresponding to the first first bead (300) and efficiently distributing the cooling air, thereby reducing the temperature deviation.
- the other configurations are the same as the configuration of the first bead (300) of the first embodiment.
- FIG. 12 illustrates the results of a temperature distribution simulation using CFD (Computational Fluid Dynamics) to simulate a temperature deviation in a battery pack (1000) according to the fourth embodiment.
- CFD Computer Fluid Dynamics
- the temperature distribution showed the minimum temperature deviation (2.5/3.37) per CP compared to a general battery pack without beads, as shown in Table 1 described below, indicating a 70%/42% reduction in temperature deviation.
- the first bead (300) is placed only on the first side portion (220), but in another embodiment, the second bead (350) may also be placed on the second side portion (210), and the second bead (350) placed on the second side portion (210) may be placed to correspond to each of the three cell module assemblies (100) adjacent to the exhaust port (202).
- the height at which the second bead (350) protrudes from the second side portion (210) may be formed to gradually decrease along the opposite direction of the direction of movement of the cooling air in the exhaust port (202), and the height at which the first second bead (350) closest to the exhaust port (202) protrudes from the second side portion (210) may be within about 60 ⁇ 5% of the gap between the second side portion (210) and the other end (front plate (110)) of the cell module assembly (100), the second second bead (350) may be within about 40 ⁇ 5% of the gap between the second side portion (210) and the other end (front plate (110)) of the cell module assembly (100), and the third second bead (350) may be within about It can be within 20 ⁇ 5%.
- FIG. 13 is a partial detailed view of a battery pack according to a fifth embodiment of the present invention.
- the battery pack (1000) according to the fifth embodiment of the present invention is different from the previous embodiment in that the first bead (300) (or the second bead (350)) has a different shape in planar view.
- the first bead (300) (or the second bead (350)) was formed in a trapezoidal shape on a plane, but in the present embodiment, it may be formed in a triangular shape.
- the first bead (300) (or second bead (350)) may include a first inclined surface portion (301a) bent from the first side portion (220), and a second inclined surface portion (301b) bent from the first inclined surface portion (301a) and connected to the first side portion (220).
- the second inclined surface portion (301b) may be bent from an end of the first inclined surface portion (301a) and may extend toward the first side portion (220), and the end of the second inclined surface portion (301b) may be connected to the first side portion (220).
- the inclination angle of the second inclined surface portion (301b) with respect to the first side portion (220) may be the same as that of the first inclined surface portion (301a). That is, the inclination angle of the second inclined surface portion (301b) with respect to the first side portion (220) may form an obtuse angle, and specifically, may be within a range of 130 to 140 degrees or approximately 135 degrees.
- the plurality of first beads (300) (or second beads (350)) arranged on the first side portion (220) may be formed so that their planar cross-sectional areas gradually increase while maintaining a triangular shape along the direction of movement of the cooling air at one end of the first side portion (220) adjacent to the air supply port (201).
- the plurality of first beads (300) (or second beads (350)) arranged on the first side portion (220) may have the same inclination angles of the first inclined surface portion (301a) and the second inclined surface portion (301b), but as the planar cross-sectional area increases, the height (D) protruding from the first side portion (220) may be formed so that the height (D) protruding from the first side portion (220) gradually increases along the direction of movement of the cooling air at one end of the first side portion (220) adjacent to the air supply port (201).
- the first first bead (300) most adjacent to the air inlet (201) may have a height (D) protruding from the first side portion (220) within about 15 to 25% of the distance between the first side portion (220) and one end of the cell module assembly (100) (or the rear plate (120))
- the second first bead (300) may have a height (D) protruding from the first side portion (220) within about 35 to 45% of the distance between the first side portion (220) and one end of the cell module assembly (100) (or the rear plate (120)
- the third first bead (300) may have a height (D) protruding from the first side portion (220) within about 55 to 65% of the distance between the first side portion (220) and one end of the cell module assembly (100) (or the rear plate (120)).
- the first bead (300) (or the second bead (350)) may be arranged to face the space between the cell module assemblies (100) at the first side portion (220), and may be arranged in an area where an extension of the space between two cell module assemblies (100) meets the first side portion (220). In this way, by arranging the first bead (300) to face the space between the cell module assemblies (100) at the first side portion (220), cooling air can be smoothly introduced into the space between the cell module assemblies (100).
- cooling air introduced through the air inlet (201) moves in a straight line and then moves along the first inclined surface (301a) so that the cooling air can be induced between the cell module assembly (100).
- the spacing between the first beads (300) is shown to be the same, but the distance between the first first bead (300) and the second first bead (300) may be longer than the distance from the air inlet (210) to the first first bead.
- FIG. 14 is a drawing illustrating various embodiments and comparative examples of the present invention
- FIG. 15 is a drawing illustrating a temperature distribution of the test example illustrated in FIG. 14
- FIG. 16 is a graph illustrating the flow rate of each cell module assembly in the test example illustrated in FIG. 14.
- FIG. 14 illustrates an example of bead application arrangement for performing a temperature distribution simulation.
- Case#1 is a general battery pack without beads of the present invention
- Case#2 is a battery pack in which three beads are arranged on the first side portion according to the first embodiment of the present invention and the protrusion heights of the beads are each 15 mm
- Case#3 is a battery pack in which three beads are arranged on the first side portion according to the first embodiment of the present invention and the protrusion heights of the beads are each 7.5 mm
- Case#4 is a battery pack in which three beads are arranged on the first side portion according to the fourth embodiment of the present invention and the protrusion heights of the beads are each 5 mm, 10 mm, and 15 mm
- Case#5 is a battery pack in which three beads are arranged on the first side portion and the second side portion according to the third embodiment of the present invention and the protrusion heights of the beads are each 7.5 mm
- Case#6 is a battery pack in which three beads are
- Tables 1 and 2 below show the results of temperature distribution simulations performed for each case in Fig. 14.
- Table 1 shows the maximum and minimum temperatures for each case when 25°C cooling air was injected at 0.25CP Heat Source Temperature (1cp refers to the power that can fully charge the battery in 1 hour), and Table 2 shows the maximum and minimum temperatures for each case when 25°C cooling air was injected at 0.5CP Heat Source Temperature.
- the temperature deviation was found to be reduced in all cases according to the present invention (Case#2 to 6)
- the minimum temperature deviation was confirmed in Case#4.
- Table 3 and FIG. 16 show the inflow rate for each case in the cell module assembly (100), and CMA#6 to #1 show cell module assemblies (100) sequentially arranged in the direction from the supply port (201) to the exhaust port (202), with CMA#6 representing the cell module assembly (100) closest to the supply port (201) and CMA#1 representing the cell module assembly (100) closest to the exhaust port (202).
- the inflow rate generally increases as it gets closer to the exhaust port (202) from CMA#6, which is the cell module assembly (100) closest to the intake port (201), and that the inflow rate is the largest in CMA#1, which is the cell module assembly (100) closest to the exhaust port (202).
- the battery pack according to the present invention can improve battery life by minimizing temperature deviation, and battery performance and battery operation safety can be secured through the effect of improving battery life.
- the present invention can provide a battery pack in which the temperature difference between battery cell assemblies within the battery pack is improved, thereby improving battery performance and extending battery life.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
| Temp[℃] | Case#1 | Case#2 | Case#3 | Case#4 | Case#5 | Case#6 |
| Max Temp[℃] | 33.82 | 31.73 | 31.44 | 31.37 | 31.53 | 31.57 |
| Min Temp[℃] | 29.38 | 28.33 | 28.73 | 28.87 | 28.71 | 28.86 |
| 온도 편차 | 4.44 | 3.40 | 2.71 | 2.50 | 2.82 | 2.71 |
| Temp[℃] | Case#1 | Case#2 | Case#3 | Case#4 | Case#5 | Case#6 |
| Max Temp[℃] | 45.04 | 42.20 | 41.87 | 41.78 | 41.97 | 42.02 |
| Min Temp[℃] | 39.25 | 37.02 | 38.13 | 38.41 | 38.10 | 38.40 |
| 온도 편차 | 5.79 | 5.18 | 3.74 | 3.37 | 3.87 | 3.62 |
| Num. | Case#1 | Case#2 | Case#3 | Case#4 | Case#5 | Case#6 |
| CMA#1 | 9.11 | 8.49 | 8.99 | 9.36 | 9.63 | 9.38 |
| CMA#2 | 6.98 | 5.69 | 6.22 | 6.70 | 6.68 | 5.99 |
| CMA#3 | 5.68 | 3.46 | 4.11 | 4.69 | 4.54 | 3.75 |
| CMA#4 | 5.29 | 2.60 | 3.45 | 3.81 | 3.70 | 3.16 |
| CMA#5 | 3.55 | 4.26 | 4.84 | 3.92 | 3.83 | 4.68 |
| CMA#6 | -4.21 | 4.97 | 2.21 | 1.85 | 1.68 | 2.28 |
| 유량편차Max-Min | 13.32 | 5.88 | 6.78 | 7.52 | 7.95 | 7.11 |
Claims (20)
- 복수의 셀 모듈 집합체; 및상기 셀 모듈 집합체를 수용하는 케이스;를 포함하고,상기 케이스는상기 케이스에서 냉각공기가 유입되는 급기구;상기 케이스에서 냉각공기가 배출되는 배기구; 및상기 케이스의 일측면에 배치되는 제1 측면부;를 포함하고,상기 제1 측면부는 상기 제1 측면부로부터 상기 케이스 내측으로 돌출되는 복수의 제1 비드를 포함하는 온도편차가 개선되는 배터리 팩.
- 제1항에 있어서,상기 케이스는 상기 제1 측면부와 마주보도록 배치되는 제2 측면부를 더 포함하는 온도편차가 개성되는 배터리 팩.
- 제2항에 있어서,상기 케이스의 상기 제1 측면부 내측에 배치되어 상기 급기구로부터 유입되는 냉각공기가 이동하는 유입 이동통로; 및상기 케이스의 상기 제2 측면부 내측에 상기 배기구로 냉각공기가 배출되도록 냉각공기가 이동하는 유출 이동통로;를 더 포함하는 온도편차가 개선되는 배터리 팩.
- 제2항에 있어서,상기 케이스는상기 케이스의 타측면에 배치되는 제3 측면부; 및상기 제3 측면부와 마주보도록 배치되는 제4 측면부;를 더 포함하는 온도편차가 개선되는 배터리 팩.
- 제4항에 있어서,상기 급기구는 상기 제3 측면부에 배치되고, 상기 배기구는 상기 제4 측면부에배치되는 온도편차가 개선되는 배터리 팩.
- 제4항에 있어서,복수의 상기 셀 모듈 집합체는 상기 제3 측면부에서 상기 제4 측면부 방향을 따라 배치되는 온도편차가 개선되는 배터리 팩.
- 제1항에 있어서,상기 제1 비드는 상기 제1 측면부의 전체 두께가 상기 케이스 내측으로 돌출되도록 형성되는 온도편차가 개선되는 배터리 팩.
- 제1항에 있어서,상기 제1 비드는 상기 제1 측면부에서 상기 셀 모듈 집합체 사이 공간을 마주보도록 배치되는 온도편차가 개선되는 배터리 팩.
- 제1항에 있어서,상기 제1 비드는 평면상에서 사다리꼴 형상을 가지는 온도편차가 개선되는 배터리 팩.
- 제5항에 있어서,상기 제1 비드는 상기 제3 측면부에 연결되는 상기 제1 측면부의 일단에서 상기 제1 측면부 길이의 1/2 이내에 배치되는 온도편차가 개선되는 배터리 팩.
- 제10항에 있어서,상기 제1 비드의 개수는 상기 셀 모듈 집합체 개수의 1/2이하인 온도편차가 개선되는 배터리 팩.
- 제1항에 있어서,상기 제1 비드는 평면상에서 삼각형 형상을 가지는 온도편차가 개선되는 배터리 팩.
- 제1항에 있어서,복수의 상기 제1 비드는 상기 제1 측면부에서 돌출되는 높이가 상기 급기구에서 유입되는 냉각공기의 이동방향을 따라 점차 증가하는 온도편차가 개선되는 배터리 팩.
- 제13항에 있어서,상기 급기구로부터 첫 번째 상기 제1 비드에서 상기 제1 측면부로부터 돌출높이는 상기 제1 측면부와 상기 셀 모듈 집합체의 일단 사이 간격의 15%~25%이고, 상기 급기구로부터 두 번째 상기 제1 비드의 돌출높이는 상기 제1 측면부와 상기 셀 모듈 집합체의 일단 사이 간격의 35%~45%이며, 상기 급기구로부터 세 번째 상기 제1 비드의 돌출높이는 상기 제1 측면부와 상기 셀 모듈 집합체의 일단 사이 간격의 55%~65%인 온도편차가 개선되는 배터리 팩.
- 제1항에 있어서,상기 제1 비드는 상기 제1 측면부에서 차지하는 상하높이가 상기 급기구에서 유입되는 냉각공기의 이동방향을 따라 점차 증가하는 온도편차가 개선되는 배터리 팩.
- 제2항에 있어서,상기 제2 측면부는 상기 제2 측면부로부터 상기 케이스 내측으로 돌출되는 복수의 제2 비드를 포함하는 온도편차가 개선되는 배터리 팩.
- 제16항에 있어서,상기 케이스는상기 케이스의 타측면에 배치되는 제3 측면부; 및상기 제3 측면부와 마주보도록 배치되는 제4 측면부;를 더 포함하고,상기 제2 비드는 상기 제4 측면부에 인접한 상기 셀 모듈 집합체에서부터 차례로 각각 대응되도록 배치되는 온도편차가 개선되는 배터리 팩.
- 제17항에 있어서,상기 제2 비드는 상기 제2 측면부에서 돌출되는 높이가 상기 배기구에서 냉각공기의 이동방향의 역방향을 따라 점차 감소하는 온도편차가 개선되는 배터리 팩.
- 제18항에 있어서,상기 제2 비드는 상기 제4 측면부에 연결되는 상기 제2 측면부의 일단에서 상기 제2 측면부 길이의 1/2 이내에 배치되는 온도편차가 개선되는 배터리 팩.
- 제19항에 있어서,상기 제2 비드의 개수는 상기 셀 모듈 집합체 개수의 1/2이하인 온도편차가 개선되는 배터리 팩.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024572706A JP2025525316A (ja) | 2023-06-14 | 2024-03-22 | 温度偏差が改善される電池パック |
| CN202480003390.XA CN119547257A (zh) | 2023-06-14 | 2024-03-22 | 具有减小的温度偏差的电池组 |
| EP24820523.9A EP4528888A4 (en) | 2023-06-14 | 2024-03-22 | BATTERY BLOCK WITH REDUCED TEMPERATURE DIFFERENCE |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20230076215 | 2023-06-14 | ||
| KR10-2023-0076215 | 2023-06-14 | ||
| KR1020240039162A KR20240176048A (ko) | 2023-06-14 | 2024-03-21 | 온도편차가 개선되는 배터리 팩 |
| KR10-2024-0039162 | 2024-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024258005A1 true WO2024258005A1 (ko) | 2024-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2024/003594 Ceased WO2024258005A1 (ko) | 2023-06-14 | 2024-03-22 | 온도편차가 개선되는 배터리 팩 |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4528888A4 (ko) |
| JP (1) | JP2025525316A (ko) |
| CN (1) | CN119547257A (ko) |
| WO (1) | WO2024258005A1 (ko) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070014661A (ko) * | 2005-07-29 | 2007-02-01 | 삼성에스디아이 주식회사 | 이차 전지 모듈 |
| KR20070105116A (ko) * | 2006-04-25 | 2007-10-30 | 삼성에스디아이 주식회사 | 이차 전지 모듈 |
| JP2007299637A (ja) * | 2006-04-28 | 2007-11-15 | Toyota Motor Corp | 電池冷却構造 |
| JP2007299638A (ja) * | 2006-04-28 | 2007-11-15 | Toyota Motor Corp | 電池冷却構造 |
| KR20160024688A (ko) * | 2014-08-26 | 2016-03-07 | 주식회사 엘지화학 | 냉각 효율이 향상된 배터리팩 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100938626B1 (ko) * | 2006-12-30 | 2010-01-22 | 주식회사 엘지화학 | 냉매 유량의 분배 균일성이 향상된 중대형 전지팩 케이스 |
| KR100942985B1 (ko) * | 2007-03-21 | 2010-02-17 | 주식회사 엘지화학 | 냉매 유량의 분배 균일성이 향상된 중대형 전지팩 케이스 |
| KR100951324B1 (ko) * | 2007-06-14 | 2010-04-08 | 주식회사 엘지화학 | 냉매 유량의 분배 균일성이 향상된 중대형 전지팩 케이스 |
| EP2405526B1 (en) * | 2010-07-06 | 2013-07-03 | Samsung SDI Co., Ltd. | Air-cooled battery pack |
| JP5690108B2 (ja) * | 2010-10-08 | 2015-03-25 | 日野自動車株式会社 | 電装収納箱の内部冷却構造 |
-
2024
- 2024-03-22 WO PCT/KR2024/003594 patent/WO2024258005A1/ko not_active Ceased
- 2024-03-22 JP JP2024572706A patent/JP2025525316A/ja active Pending
- 2024-03-22 CN CN202480003390.XA patent/CN119547257A/zh active Pending
- 2024-03-22 EP EP24820523.9A patent/EP4528888A4/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070014661A (ko) * | 2005-07-29 | 2007-02-01 | 삼성에스디아이 주식회사 | 이차 전지 모듈 |
| KR20070105116A (ko) * | 2006-04-25 | 2007-10-30 | 삼성에스디아이 주식회사 | 이차 전지 모듈 |
| JP2007299637A (ja) * | 2006-04-28 | 2007-11-15 | Toyota Motor Corp | 電池冷却構造 |
| JP2007299638A (ja) * | 2006-04-28 | 2007-11-15 | Toyota Motor Corp | 電池冷却構造 |
| KR20160024688A (ko) * | 2014-08-26 | 2016-03-07 | 주식회사 엘지화학 | 냉각 효율이 향상된 배터리팩 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4528888A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119547257A (zh) | 2025-02-28 |
| EP4528888A4 (en) | 2026-01-21 |
| JP2025525316A (ja) | 2025-08-05 |
| EP4528888A1 (en) | 2025-03-26 |
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