WO2023003427A1 - 냉각 부재, 이를 포함하는 전지 모듈 및 전지 팩 - Google Patents
냉각 부재, 이를 포함하는 전지 모듈 및 전지 팩 Download PDFInfo
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- WO2023003427A1 WO2023003427A1 PCT/KR2022/010792 KR2022010792W WO2023003427A1 WO 2023003427 A1 WO2023003427 A1 WO 2023003427A1 KR 2022010792 W KR2022010792 W KR 2022010792W WO 2023003427 A1 WO2023003427 A1 WO 2023003427A1
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- Prior art keywords
- cooling member
- cooling
- lower plate
- battery
- paragraph
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Classifications
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- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
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- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
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- 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
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- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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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 cooling member, a battery module and a battery pack including the same, and more particularly, to a cooling member for preventing a chain thermal runaway phenomenon, and a battery module and a battery pack including the same.
- a secondary battery capable of charging and discharging is a method for solving air pollution such as existing gasoline vehicles using fossil fuels, electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles ( P-HEV), etc., the need for development of secondary batteries is increasing.
- a secondary battery used in a small device 2-3 battery cells are mainly used, but in the case of a secondary battery used in a medium or large device such as an automobile, a medium or large battery module electrically connected to a plurality of battery cells (Battery module) is used. Since it is preferable that medium-large-sized battery modules are manufactured in a small size and weight as much as possible, prismatic batteries, pouch-type batteries, etc., which can be stacked with a high degree of integration and have a small weight-to-capacity ratio, are mainly used as battery cells of medium-large-sized battery modules.
- the battery cells installed in the battery module can generate a large amount of heat during the charging and discharging process, and if the temperature is higher than the proper temperature due to overcharging, etc., the performance may be deteriorated, and if the temperature rise is excessive, an explosion or There is a risk of ignition.
- an ignition phenomenon occurs inside a battery module, high-temperature heat, gas, or flame may be released to the outside of the battery module. At this time, the heat, gas, spark, or flame emitted from one battery module It can be transferred to another battery module adjacent to it at a narrow interval, and thus a continuous thermal runaway phenomenon can occur in the battery pack.
- a water injection system for extinguishing a fire by injecting cooling water through a nozzle or the like when a fire is confirmed in a battery module has been applied to a conventional battery module.
- injecting coolant from a tank disposed outside the battery module or battery pack goes through a plurality of steps such as checking whether a fire has occurred, determining whether to inject coolant, and delivering coolant, it is difficult to determine the proper timing for extinguishing a fire. It was difficult to fit.
- An object to be solved by the present invention is to provide a cooling member capable of injecting cooling water at the right time and place at the right time when the battery module or battery pack is ignited, and a battery module and battery pack including the same.
- the cooling water contained in the upper plate, the lower plate, and the inner space between the upper plate and the lower plate includes a first portion in which the weakened portion is formed and a second portion in which the weakened portion is not formed, and a thickness value of the first portion is smaller than a thickness value of the second portion.
- the weak portion may have a long side and a short side, and the long side may extend along a stacking direction of the battery cells.
- a thickness value of the first portion may be less than half of a thickness value of the second portion.
- the thickness of the first portion may be 0.03 to 0.07 mm.
- the fragile portion may include a first fragile portion and a second fragile portion spaced apart from the first fragile portion, and thickness values of the first fragile portion and the second fragile portion may be substantially the same.
- the lower plate is formed by bonding first and second layers having different thicknesses to each other, the thickness of the first part corresponds to the thickness of the first layer, and the thickness of the second part corresponds to the first layer and the thickness of the second part. It may correspond to the thickness of the second layer.
- One of the first layer and the second layer may include a clad metal.
- At least one of the upper plate, the first layer, and the second layer may include a clad metal.
- the first layer and the second layer may be bonded through a brazing process.
- the upper plate, the first layer and the second layer may be bonded through a brazing process.
- the upper plate may include a curved portion, a crest of the curved portion may correspond to the first portion, and a valley of the curved portion may correspond to the second portion.
- a battery module according to another embodiment of the present invention includes the aforementioned cooling member.
- the upper plate of the cooling member may be integral with the upper surface of the module frame forming the outer shape of the battery module.
- a cooling member is located on top of a battery cell stack in which a plurality of battery cells are stacked, and includes a lower plate having a plurality of openings, a body providing a cooling water flow path, and the lower plate and the body.
- a fixing member is included, and at least one cooling hose is mounted on the main body, and the cooling hose is melted or broken at a predetermined temperature or pressure or higher.
- the cooling hose may be positioned to correspond to the opening of the lower plate.
- the cooling hose may have a shape extending along the length direction of the cooling member.
- the cooling hose may be made of a material having a melting point of 300 °C or less.
- An accommodating portion for accommodating the cooling hose may be provided in the main body.
- Both ends of the cooling hose in the longitudinal direction may be respectively connected to both ends of the receiving portion in the longitudinal direction.
- a barrier extending in the longitudinal direction of the cooling member may be formed at the center of the lower plate, and the main body may be mounted at a position in the lower plate where the barrier is not formed.
- the fixing member is provided in the form of a strap and may be positioned parallel to the width direction of the cooling member.
- the fixing member may include an end coupling portion coupled to both ends of the lower plate in the width direction and a central coupling portion coupled to the center of the lower plate in the width direction.
- the end coupling portion and the central coupling portion may be formed to have a step difference from other portions of the fixing member.
- the cooling member further includes an inlet port and an outlet port for injecting cooling water into an internal space, the inlet port and the outlet port are connected to an external heat exchanger, and the cooling member is supplied through the inlet port and the outlet port. Cooling water can be circulated.
- the body may have a shape branched into portions corresponding to the inlet port and the outlet port, respectively.
- a battery pack according to another embodiment of the present invention may include the aforementioned cooling member.
- the battery pack may include a battery module having an open structure.
- An upper plate of the cooling member may be integrated with an upper surface of a pack frame forming an outer shape of the battery pack.
- the cooling member rapidly extinguishes the internal fire of the battery module or battery pack by opening a part of the battery module or battery pack and injecting cooling water in the right place when the battery module or battery pack internally ignites, and a continuous thermal runaway phenomenon occurs.
- FIG. 1 is a perspective view showing a cooling member according to an embodiment of the present invention.
- FIG. 2 is a view showing an upper plate included in the cooling member of FIG. 1 .
- FIG. 3 is a view illustrating a lower plate included in the cooling member of FIG. 1 .
- FIG. 4 is a view showing a modified example of a lower plate included in the cooling member of FIG. 1 .
- FIG. 5 is a view showing an example of the A-A section of FIG. 3 .
- FIG. 6 is a view showing that an example of a cooling member according to an embodiment of the present invention is provided in a battery cell stack.
- FIG. 7 is an enlarged view of region B of FIG. 6, and is a view for explaining changes in the lower plate when battery cells are ignited.
- FIG 8 is a cross-sectional view showing an example of a cooling member according to an embodiment of the present invention.
- FIG. 9 is a view showing another example of the A-A section of FIG. 3;
- FIG. 10 is a view showing that another example of a cooling member according to an embodiment of the present invention is provided in a battery cell stack.
- FIG. 11 is an enlarged view of region C of FIG. 10, and is a view for explaining changes in a lower plate when a battery cell is ignited.
- FIG. 12 is a cross-sectional view showing another example of a cooling member according to an embodiment of the present invention.
- FIG. 13 is a cross-sectional view showing a cooling member according to another embodiment of the present invention.
- FIG. 14 is an exploded perspective view illustrating a battery pack according to embodiments of the present invention.
- FIG. 15 is a perspective view of a battery module included in the battery pack according to FIG. 14 .
- FIG. 16 is a perspective view showing a cooling member according to still another embodiment of the present invention.
- FIG. 17 is a top view showing the cooling member of FIG. 16;
- FIG. 18 is a top view of a lower plate included in the cooling member of FIG. 16;
- FIG. 19 is a top view of a main body included in the cooling member of FIG. 16;
- FIG. 20 is a view showing the coupling of the lower plate, body, and cooling hose included in the cooling member of FIG. 16;
- FIG. 21 shows the cooling member of FIG. 17 cut along the line A-A, and shows cooling water flowing into or flowing out of the main body and cooling hose.
- FIG. 22 is a cut A-A view of the cooling member of FIG. 17, and is a view illustrating the injection of cooling water by a cooling hose when a battery cell is ignited.
- planar it means when the corresponding part is viewed from above, and when it is referred to as “cross-section”, it means when the cross section of the corresponding part cut vertically is viewed from the side.
- FIG. 1 is a perspective view showing a cooling member according to an embodiment of the present invention.
- FIG. 2 is a view showing an upper plate included in the cooling member of FIG. 1 .
- FIG. 3 is a view illustrating a lower plate included in the cooling member of FIG. 1 .
- FIG. 4 is a view showing a modified example of a lower plate included in the cooling member of FIG. 1 .
- the cooling member 500 of this embodiment may be provided to lower the internal temperature of a battery module or battery pack including battery cells.
- the cooling member 500 may be a water-cooled cooling member 500 into which refrigerant or cooling water is injected. Since the cooling member 500 is provided in a water-cooled manner, the cooling efficiency of the cooling member 500 can be maintained uniformly, and the battery cells in the battery module or battery pack can be evenly cooled.
- the cooling water used in the cooling member 500 one of known ones or a mixture thereof may be used, and any of the known ones can release heat from battery cells by moving along a flow path inside the cooling member 500.
- the cooling water of the cooling member 500 may be sprayed toward the battery cell as will be described later, it may be preferable that the cooling water does not contain an inflammable material so as not to amplify flame or explosion of the battery cell.
- the amount of the additive is sufficient to prevent secondary explosion of the pouch-type battery cell, and antifreeze to prevent freezing of the cooling water.
- the cooling water may include water.
- the cooling water may include an antifreeze for lowering the freezing point of water in addition to water.
- an electrically insulating antifreeze having electrical insulating properties may be used.
- the cooling member 500 may be disposed on one surface of the battery cell stack to dissipate heat from the battery cells.
- the cooling member 500 may be disposed parallel to the stacking direction of the battery cell stack to be positioned close to the plurality of battery cells of the battery cell stack. Specifically, the cooling member 500 may be located above the battery cell stack (+z-axis direction in FIG. 14).
- the size of the cooling member 500 may be matched to the size of the battery cell stack to which the cooling member 500 is applied.
- the cooling member 500 may be provided to correspond to one battery cell stack, and in this case, the length of the cooling member 500 is matched to the length of the battery cell stack or has a slight margin to increase or decrease the length of the battery cell stack. It is formed small, and the width of the cooling member 500 may be formed larger or smaller according to the width of the battery cell stack or with a slight margin.
- the cooling member 500 may be provided to correspond to a plurality of battery cell stacks, and in this case, the length and width of the cooling member 500 are matched with the length and width of the plurality of battery cell stacks or slightly It can be made large or small with a margin.
- the cooling member 500 may be located inside the battery module, but may also be located outside the battery module and inside the battery pack 1000 (see FIG. 14).
- the cooling member 500 may include an upper plate 510 and a lower plate 520 forming the outer shape of the cooling member 500, and an inlet/outlet port 530 for injecting cooling water into the cooling member 500. .
- the cooling member 500 may be formed by combining edges of the upper plate 510 and the lower plate 520 .
- a sealing portion 540 formed by combining edges of the upper plate 510 and the lower plate 520 may be positioned at an edge portion of the cooling member 500 . Cooling water may be built in or circulated between the upper plate 510 and the lower plate 520 coupled in the cooling member 500 .
- Cooling water may be supplied through the inlet port 530 located side by side and discharged through the outlet port 530 .
- the inlet port 530 and the outlet port 530 may be located parallel to one end side of the cooling member 500 . This may be to simplify the design of the inflow and outflow of cooling water supplied from the outside of the battery module or battery pack. Also, this may be to minimize a temperature difference between the inlet port 530 and the outlet port 530 .
- cooling water introduced into the inlet port 530 may have the lowest temperature
- cooling water discharged through the outlet port 530 may have the highest temperature.
- the cooling member 500 may have uniform heat dissipation performance as a whole.
- the inlet port 530 or the outlet port 530 may be made of aluminum.
- the inlet port 530 or the outlet port 530 may be joined to the upper plate 510 or the lower plate 520 through welding such as brazing.
- a passage forming groove 550 may be formed in the cooling member 500 . Since the cooling member 500 is provided with the passage forming groove 550 , the flow of cooling water supplied to the cooling member 500 may be determined.
- a plurality of passage forming grooves 550 may be formed, and the plurality of passage forming grooves 550 may be positioned along a straight line parallel to the longitudinal direction of the cooling member 500 .
- the passage forming grooves 550 may be continuously formed from the center of the cooling member 500 along the longitudinal direction of the cooling member 500 except for a predetermined section, and thus the flow of cooling water may be formed in a U shape. .
- a flow of cooling water injected through the inlet port 530 of the cooling member 500 may be restricted by the passage forming groove 550 .
- the cooling water injected through the inlet port 530 may be discharged to the outlet port 530 located in parallel with the inlet port 530 .
- the U-shaped passage through which the cooling water flows is a first passage extending from the inlet port 530 along a straight line parallel to the longitudinal direction of the cooling member 500, and clockwise or counterclockwise from the end of the first passage. It may include a second flow path extending along a rotating curve, and a third flow path extending from an end of the second flow path toward the outlet port 530 along a straight line parallel to the longitudinal direction of the cooling member 500 .
- a deformation prevention groove 560 may be formed in the cooling member 500 . Since the cooling member 500 is provided with the deformation prevention groove 560 , shape deformation of the cooling member 500 due to cooling water may be prevented. For example, when coolant is injected into the cooling member 500, the injected coolant may be concentrated in a 1/2 space of the cooling member 500 by the passage forming groove 550 crossing the center. Until the cooling water moves to the remaining 1/2 space through the U-shaped passage, a large pressure may act on the corresponding space, and as a result, at least a part of the cooling member 500 may expand or the cooling member 500 may be damaged. there is.
- the deformation prevention grooves 560 may be partially disposed at intervals in the U-shaped passage through which cooling water flows in the cooling member 500 .
- the deformation prevention groove 560 may be located between the flow path forming groove 550 and the sealing part 540 in the width direction of the cooling member 500 .
- a specific location of the deformation prevention groove 560 may be appropriately set to correspond to the flow rate and flow rate of the cooling water without excessively obstructing the cooling water flowing through the inlet port 530 .
- the width direction of the cooling member 500 may be a direction parallel to the short side of the cooling member 500 .
- the longitudinal direction of the cooling member 500 may be a direction parallel to the long side of the cooling member 500 .
- protrusions extending from one side of the cooling member 500 and continuously positioned along the longitudinal direction of the cooling member 500 may be formed around the cooling member 500 .
- the protrusion may contact or be disposed close to the electrode lead of each battery cell stack or the bus bar connected to the electrode lead. Since an electrode lead or bus bar providing electrical connection in a battery module or battery pack is a component that easily generates heat, if the above-described protrusion promotes heat dissipation of the electrode lead or bus bar, the temperature rise of the battery cell can be more effectively prevented.
- the upper plate 510 may be provided in a plate shape.
- the central portion of the upper plate 510 may be formed to have a step with the edge portion by being recessed or recessed.
- the upper plate 510 may have a recessed shape based on a cross section in the width direction. This may be that the upper plate 510 forms an internal space through a step in order to accommodate the cooling water.
- the width direction of the top plate 510 may be a direction parallel to the short side of the top plate 510 .
- the upper plate 510 may be formed differently from that shown in FIG. 2 , and when the lower plate 520 includes the weak portion 522 and the like to have a space for storing coolant, the upper plate 510 is flat as a whole. It is also possible to provide to have a shape.
- the lower plate 520 of the cooling member 500 may have an overall shape similar to that of the upper plate 510 .
- the lower plate 520 may be provided in a plate shape.
- the lower plate 520 may be formed such that its central portion is recessed or indented to have a step with the edge portion.
- the lower plate 520 may have a recessed shape based on its cross section in the width direction, thereby forming an internal space for accommodating the cooling water.
- the lower plate 520 does not necessarily have to be provided in a recessed shape, and may be provided in a generally flat shape depending on the shape of the upper plate 510 or the volume of coolant to be contained therein.
- the width direction of the lower plate 520 may be a direction parallel to the short side of the lower plate 520 .
- the lower plate 520 may have a weak portion 522 to be described later, and accordingly, one surface of the lower plate 520 may have a partially recessed groove.
- the groove When the groove is positioned toward the inside of the cooling member 500, that is, formed on the upper surface of the lower plate 520, cooling water may be contained in the groove.
- the lower plate 520 When the cooling member 500 is provided above the battery cell, the lower plate 520 may be a portion of the cooling member 500 positioned closest to the battery cell. Therefore, it may be desirable for the lower plate 520 to be provided with a material having high thermal conductivity to promote heat dissipation of the battery cell.
- the upper plate 510 of the cooling member 500 may also be provided with a material having high thermal conductivity.
- the upper plate 510 and the lower plate 520 forming the outer shape of the cooling member 500 may be made of a metal having high rigidity, and specific examples thereof include aluminum, gold, silver, copper, platinum, or alloys including these. can be heard
- a liquid such as cooling water into the battery module or battery pack in order to effectively suppress the ignition when the battery cell is ignited.
- a liquid tank inside the battery module or battery pack may increase the volume of the battery module and battery pack, conventionally, a separate water tank is provided outside the battery module and the battery pack, and the battery is stored through a sensor. Cooling water or the like was injected into the battery module or battery pack through a nozzle or the like extending from the water tank only when ignition of the cell was confirmed.
- the water tank provided outside the battery module and the battery pack is not only bulky, but also requires a user to separately manage it.
- the conventional water supply system must have a separate control unit or communication unit for determining whether or not to input cooling water, and errors must not occur in their operation. It became. Even after the injection of cooling water is determined, if the path from the water tank to the battery module or the battery cell inside the battery pack is rather long, it is difficult to quickly provide cooling water from the water tank to the battery cell. It was difficult to stop the continuous thermal runaway phenomenon.
- the lower plate 520 of the cooling member 500 of the present embodiment which has a portion vulnerable to heat or temperature and thus can be partially opened when the battery cell ignites, will be described in more detail.
- the lower plate 520 of this embodiment may include a weak portion 522 .
- the 'weak part' may refer to a part that is more easily broken by heat or pressure than other parts of the lower plate 520 .
- the weak portion 522 may be a portion having a relatively smaller thickness value than other portions of the lower plate 520 .
- the lower plate 520 may have a first portion referred to as a weak portion 522 and a second portion in which the weak portion 522 is not formed, wherein the thickness of the second portion may be greater than the thickness of the first portion. there is.
- a thickness value of the first portion may be less than half of a thickness value of the second portion. Since the weak portion 522 has a slightly smaller thickness value than other portions, it can be relatively easily pierced by heat or pressure.
- the weak portion 522 may be formed to be long and extend along the stacking direction of the battery cells.
- the longitudinal direction (y-axis) of the weak portion 522 may be a direction in which the length (long side) extends, and may be a direction parallel to the stacking direction of the battery cells 110 .
- the width direction (x-axis) of the weak portion 522 may be a direction perpendicular to the stacking direction of the battery cells 110 . Since it is impossible to predict which of the battery cells 110 will be ignited, it may be preferable that the weak portion 522 is formed to correspond to all battery cells located under the cooling member 500 .
- the weak portion 522 may be formed over the entire length of the cooling member 500 . here.
- one straight line parallel to the stacking direction of the battery cells may be provided as shown in FIG. 3, or two or more may be provided along a straight line parallel to the stacking direction of the battery cells as shown in FIG. 4.
- the weak parts 522 may be continuously positioned in the width direction (x-axis).
- the width of the weak portion 522 may be designed differently according to a designer's intention.
- the weak portion 522 may have a wide width.
- the weak portion 522 may have a relatively narrow width.
- the weak portion 522 having a narrow width may be continuously formed.
- the weak portion 522 may be positioned to correspond to a portion most likely to generate heat among the battery cells.
- an electrode lead of a battery cell may be a portion that easily generates heat due to concentration of electron movement.
- the weak portion 522 may be disposed above the electrode lead of the battery cell.
- FIG. 5 is a view showing an example of the A-A section of FIG. 3 .
- the cross section of the weak portion 522 may have various shapes.
- the cross section of the weakened portion 522 may be obtained by cutting the cooling member 500 based on the xz plane as shown in FIG. 3 .
- the weak portion 522 is a portion of the lower plate 520 having a different thickness, and a first portion without the weakened portion 522 and a second portion with the weakened portion 522 are perpendicularly connected to each other. As a result, it may have a rectangular cross-sectional shape as shown in FIG. 5 (a). In addition, when an inclination is formed on the connection surface between the above-described first and second parts, a portion of the lower plate 520 has a triangular cross-sectional shape as shown in FIG. 5 (b) or a trapezoidal shape as shown in FIG.
- a portion of the lower plate 520 may have a round cross section as shown in FIG. 5(c).
- the cross-sectional shape of the lower plate 520 according to the formation of the weak portion 522 is not limited by the above-described examples, and may be variously modified in consideration of ease of design. Considering that the weak part 522 should be broken by heat or temperature, it may be preferable that the weak part 522 include as many thin parts as possible, so that the weak part 522 has a different shape than that of FIG. Shapes may be desired. However, since the fracture temperature and pressure may be affected by factors such as thickness, physical properties, and shape, the shape of FIG. 5(b) may not necessarily be more preferable than the other shapes of FIG.
- FIG. 6 is a view showing that an example of a cooling member according to an embodiment of the present invention is provided in a battery cell stack.
- FIG. 7 is an enlarged view of region B of FIG. 6, and is a view for explaining changes in the lower plate when battery cells are ignited.
- 8 is a cross-sectional view showing an example of a cooling member according to an embodiment of the present invention. Meanwhile, in FIG. 8, it is noted in advance that the upper plate 510 is omitted.
- the battery cell stack 120 in which battery cells 110 are stacked in one direction is accommodated in a module frame or pack frame, and the cooling member 500 is a battery cell stack 120 can be placed on top.
- the cooling member 500 includes an upper plate 510 and a lower plate 520 , and cooling water may be accommodated in a spaced space between the upper plate 510 and the lower plate 520 .
- the lower plate 520 of the cooling member 500 is positioned toward the battery cell stack 120, and the weak parts 522 formed on the lower plate 520 correspond to the battery cells 110 of the battery cell stack 120. It may be formed long along the stacking direction of the battery cell 110 so as to be. 6 and 7 show cross-sections of locations where the weak portion 522 is formed, and the upper surface of the lower plate 520 where the weak portion 522 is not formed may be hidden by cooling water. Accordingly, the upper surface of the second portion of the lower plate 520 is indicated by dotted lines in FIGS. 6 and 7 .
- the weak part 522 located on the upper part of the first battery cell 110a.
- a first part of may be broken.
- the cooling water accommodated in the inner space of the cooling member 500 may be injected toward the first battery cell 110a where a fire has occurred.
- the weak part 522 opens a part of the first battery cell 110a so that cooling water is immediately injected into the first battery cell 110a, compared to a conventional water supply system. Fire suppression of (110a) can be performed quickly, and early suppression of thermal runaway phenomenon can be achieved.
- the first part is opened, so the weak part 522 Only one portion may be opened while other portions of the weak portion 522 may remain closed. If parts other than the first part of the weak part 522 are maintained in a closed state, the cooling water inside the cooling member 500 may be concentrated in the first part and discharged. Therefore, compared to a conventional water injection system, cooling water may be injected concentrated in the first battery cell 110a, and efficiency of water injection and fire extinguishing may be maximized.
- the amount of cooling water may be preset to a level sufficient to extinguish a fire generated in some of the battery cells 110 .
- the number of battery cells 110 which is the basis for calculating the amount of cooling water, may be the number of battery cells 110 to which thermal runaway is normally transmitted during internal ignition, specifically four to six, or more. It can be one or two small or large numbers.
- the cooling water sprayed toward the first battery cell 110a is evaporated into water vapor during the fire suppression process, the cooling water may not remain in the battery module or battery pack, and the battery cell 110 may be normal due to the remaining moisture. damage can be prevented.
- the cooling member 500 of this embodiment is a battery cell such as a cylindrical, prismatic or pouch type It can be applied in various ways without being restricted by the type or capacity of (110).
- the cooling water of the cooling member 500 may or may not be introduced from the outside and circulated.
- the cooling member 500 may be connected to an external tank, and the cooling water introduced from the tank may be circulated in the cooling member 500 through the inlet/outlet port 530 and discharged back into the tank. .
- the temperature of the cooling water can be appropriately maintained, heat dissipation performance of the cooling member 500 can be improved.
- cooling water inside the cooling member 500 may not be additionally introduced.
- the cooling water is injected before the cooling member 500 is mounted on the battery module or battery pack, and may not be additionally injected or discharged when the battery module or battery pack is used.
- the cooling member 500 is not continuously connected to an external tank and is embedded in a battery pack or battery module, the overall structure can be simplified by omitting the external tank, which is efficient in space utilization, and maintenance/management of the external tank is required. Cost and time can be reduced. Also, in this case, it may be possible for the inlet/outlet port 530 to be excluded from the cooling member 500 for design simplification.
- the amount of cooling water injected into the battery module or battery pack when the first battery cell 110a is internally ignited is the amount of cooling water accommodated in the cooling member 500. may be limited in its entirety.
- the cooling member 500 has partition walls or grooves therein so that the movement of the coolant inside the cooling member 500 is restricted, the amount of coolant injected into the first battery cell 110a is limited to the weak portion 522 and The amount of cooling water accommodated between the top plate 510 may be limited.
- the control system including the cooling member 500 may detect a thermal transition or thermal runaway phenomenon, and when the thermal runaway phenomenon is detected, the first battery cell 110a controls the inflow or circulation of additional cooling water.
- the amount of cooling water introduced into the cooling unit may be limited within the volume range of the cooling member 500 .
- the weak part 522 according to the present embodiment can quickly extinguish the fire and prevent continuous thermal runaway by injecting cooling water at the right time and in the right place when the battery pack or battery module is ignited.
- the weak portion 522 of this embodiment may be formed in various ways.
- the weak portion 522 may be formed by partially etching the lower plate 520 .
- Weakness 522 may be formed using a notching process.
- the equipment used in the etching process may be difficult to control at a precise level, and when the thickness of the lower plate 520 is thin or when the desired thickness of the weak portion 522 is thin, the dimensional stability of the weak portion 522 is very poor. can fall
- the lower plate 520 when the lower plate 520 is made of aluminum, the lower plate 520 may have a thin thickness of 4 mm, 3 mm, or 2 mm or less.
- the appropriate thickness of the weak part 522 may vary depending on the material of the weak part 522, but when the lower plate 520 is made of aluminum, the weak part 522 may be preferably formed to a thickness of 0.2 to 0.5 mm. there is.
- the lower plate 520 In order for the lower plate 520 to have the weak portion 522, a portion of the lower plate 520 that is already sufficiently thin must be removed to form a thin film level. Therefore, if the control of the device is not perfect, the lower plate 520 may have a weak portion 522. ) may be damaged in the process of being formed, and accordingly, process cost and process time due to an increase in defective products may be wasted. Accordingly, when the lower plate 520 has the weak portion 522 as in the present embodiment, application of an etching process may not be desirable.
- the lower plate 520 may be formed by bonding two layers. As shown in FIG. 8 , the lower plate 520 may be formed by bonding a first layer 524 provided as a plate-shaped member and a second layer 526 having a plurality of holes. For reference, a hatched portion in FIG. 8 represents the second layer 526 , and a partially empty space between the hatched lines represents a cross section of a hole formed in the second layer 526 .
- the hole formed in the second layer 526 may be a portion for forming the aforementioned weak portion 522 .
- the hole may have an elongated shape.
- One or more holes may be formed along a straight line parallel to the long side of the lower plate 520 .
- the holes may not have an elongated shape depending on the number and spacing thereof.
- the axial cross section of the hole may have various shapes as shown in FIG. 5 .
- the radial cross section of the hole may have an angular shape or may have a round shape.
- a part of the lower plate 520 may have a relatively thick thickness by including the first layer and the second layer, and another part of the lower plate 520 may have a relatively thin thickness by including only the first layer 524 .
- a portion having the first layer 524 may be referred to as a first portion, and a portion having both the first layer 524 and the second layer 526 may be referred to as a second portion.
- the thickness of the first portion may correspond to the thickness of the first layer 524 and the thickness of the second portion may correspond to the thicknesses of the first layer 524 and the second layer 526 .
- the thickness of each layer can be freely adjusted, so that the weak portion 522 can be formed thin enough.
- the first layer 524 and the second layer 526 are provided from aluminum
- the first layer 524 may have a thickness of 0.03 to 0.07 mm, or 0.04 to 0.06 mm, or 0.05 mm of aluminum. It is provided as a plate material, and the second layer 526 may be provided in a state in which a hole is formed in an aluminum plate material having a thickness of 1.0 to 1.5 mm or more.
- the thickness of the first layer 524 may be designed to be sufficiently thick to a level that can be melted by thermal runaway of the battery cell.
- the first layer 524 may be provided to have a thickness slightly greater than the aforementioned thickness value.
- a lower plate 520 having a weakened portion 522 having a sufficiently thin thickness may be formed.
- the lower plate 520 is formed by bonding the two layers, since all the weak parts 522 are formed as one plate, their thickness values may be the same.
- thicknesses of the first and second fragile portions may be substantially equal to each other.
- the thickness value of each weak part 522 may not show a deviation depending on its location. If a thickness deviation occurs depending on the location of the weak portion 522, a portion of the weakened portion 522 may be formed thicker than designed, and accordingly, a specific portion may be difficult to break due to heat or pressure.
- all of the weak parts 522 of this embodiment are formed to have a uniform thickness, errors between design and actual products can be minimized.
- the bonding of the two layers may be formed through a welding process.
- the welding process used for the bonding include brazing or laser welding.
- the two layers can be melt-bonded.
- the watertightness of the lower plate 520 may be achieved at a desired level.
- the bonding of the two layers may be formed through a rolling process.
- the rolling process is a method of bonding two layers by passing a laminate in which two or more layers are laminated between a pair of rolls.
- the laminate may be heated.
- the heating temperature is higher than the recrystallization temperature of the metal, it may be referred to as hot roll, and if it is lower than the temperature, it may be referred to as cold roll. there is.
- the materials of the two layers may be different, or may be the same or similar to each other.
- the materials of the two layers are the same or similar to each other, since the melting points of the two layers are the same/similar, the above-described bonding process involving heat or pressure may be more easily performed.
- the bonding process may not be performed smoothly depending on the physical properties or melting point of the metal.
- the two layers are formed of aluminum having a single property
- the temperature of the brazing process is set to 660° C., which is the melting point of aluminum
- shape deformation of the aluminum layer may occur during the bonding process.
- the first layer 524 or the second layer 526 may be made of clad metal, which is a double-layer metal material.
- the first layer 524 may be a clad metal including 3000-series aluminum and the second layer 526 may include 3000-series and 4000-series aluminum.
- the temperature of the brazing process can be set to 600° C., and thus, development deformation of aluminum can be prevented during the bonding process.
- the above-described bonding methods may also be used when the upper plate 510 and the lower plate 520 are coupled. Accordingly, when the physical properties of the upper plate 510 and the lower plate 520 are the same, the bonding between the two members may be formed more precisely.
- the upper plate 510 and the lower plate 520 or the first layer 524 and the second layer 526 may include aluminum.
- the lower plate 520 has been described with a focus on the case where the lower surface has a flat shape.
- the stepped portion of the lower plate 520 formed by locally adjusting the thickness, that is, the groove does not face the inside of the cooling member 500 and may be exposed to the outside.
- FIG. 9 is a view showing another example of the A-A section of FIG. 3; 10 is a view showing that another example of a cooling member according to an embodiment of the present invention is provided in a battery cell stack.
- FIG. 11 is an enlarged view of region C of FIG. 10, and is a view for explaining changes in a lower plate when a battery cell is ignited.
- 12 is a cross-sectional view showing another example of a cooling member according to an embodiment of the present invention.
- the weak portion 522 may be formed to be located close to the upper surface of the lower plate 520.
- can 9 to 12 when the weak portion 522 is located close to the upper surface of the lower plate 520, the lower surface of the cooling member 500 may have a locally protruding shape. Therefore, since the protruding lower surface of the cooling member 500 may be positioned close to or in contact with the battery cell, heat dissipation of the battery cell may be promoted.
- the cross section of the lower plate 520 may have a rectangular, triangular, round, or trapezoidal cross-sectional shape. Since the cross-sectional shape of FIG. 9 can be described with reference to the contents of FIG. 5 except that the vertical direction is reversed, a detailed description is omitted.
- FIGS. 10 and 11 are views showing cross-sections of the cooling member 500 cut along the xz plane when the cooling member 500 is shown on the battery cell stack, and the cooling member ( 500) is shown in more detail.
- the positional relationship between the plurality of battery cells 110 and the weak part 522 is shown in FIGS. 6 and 7
- the positional relationship between one battery cell 110 and the weak part 522 is shown in FIGS. 10 and 11 is shown 10 and 11
- one battery cell 110 may correspond to a plurality of weak parts 522, and according to the location where ignition occurs among the battery cells 110, the corresponding weak parts 522 can be opened. Accordingly, when the battery cell 110 is ignited, one or more vulnerable parts 522 may be opened.
- the opening of the weak part 522 includes a case in which only a part of one weak part is opened, and does not necessarily mean that the whole of the weak part 522 is opened.
- FIGS. 6 and 7 have a different direction from FIGS. 6 and 7 and also have a protruding shape on the lower surface of the cooling member 500 . Even if the lower surface of the cooling member 500 has a protruding shape, when the battery cell 110 is ignited, the weak portion 522 is opened so that the cooling water is injected into the battery cell 110. A detailed description may be provided through the contents of FIGS. 6 and 7 . Therefore, detailed descriptions are omitted to avoid redundant description.
- the lower plate 520 with its lower surface protruding and the weak portion 522 formed thereon may be formed in various ways.
- the weak portion 522 may be formed by etching the lower surface of the lower plate 520 .
- lower plate 520 may be formed by joining two layers.
- the lower plate 520 may be formed by bonding a first layer 524 provided as a plate-like member and a second layer 526 having a plurality of holes.
- the second layer 526 may form a lower surface of the lower plate 520 by being positioned below the first layer 524 .
- the first layer 524 may include a 3000-series and a 4000-series clad metal
- the second layer ( 526) may include aluminum of the 3000 series.
- the upper plate 510 may also be 3000 series aluminum, and bonding between layers may be smoothly performed through 4000 series aluminum formed on the upper and lower surfaces of the first layer 524 provided as a clad metal.
- the first layer 524 may be provided with 3000-series aluminum
- the second layer 526 or the upper plate 510 may be provided with 3000-series or 4000-series clad metal.
- FIG. 13 is a cross-sectional view showing a cooling member according to another embodiment of the present invention.
- the cooling member 500 of the embodiment described with reference to FIG. 13 may include all of the contents of FIGS. 1 to 12 described above in addition to those mentioned below. Therefore, in order to minimize redundant description, the overlapping content with the above description will be omitted.
- the cooling member 500 of this embodiment may have three layers. Specifically, the upper plate 510 of the cooling member 500 may have one layer, and the lower plate 520 may have two layers.
- the lower plate 520 having two layers has been sufficiently described through the above description, a detailed description thereof will be omitted.
- the flow rate deviation of the cooling water may be determined according to the separation distance between the upper plate 510 and the lower plate 520.
- the upper plate 510 of the cooling member 500 is shown as having a flat surface as a whole except for the passage forming groove 550 and the deformation preventing groove 560 . Therefore, the flow rate deviation of the cooling member 500 may depend on the thickness difference of the lower plate 520 . Specifically, the flow rate per unit length may be relatively high around the first portion where the weak portion 522 is formed, and the flow rate per unit length may be relatively low around the second portion where the weak portion 522 is not formed. If the flow rate around the first portion is greater, the coolant may be injected more quickly according to the hydraulic pressure when the weak portion 522 is opened. Therefore, a larger flow rate around the first portion may be preferable.
- the upper plate 510 having the curved portion 514 may be provided so that the flow rate deviation of the cooling water in the cooling member 500 is formed.
- the bent portion 514 may have a corrugated cross-sectional shape based on a cross-section of the cooling member 500 in the longitudinal direction.
- the highest point of the curved portion 514 ie, the crest
- the lowest point of the bent portion 514 may correspond to the first portion of the lower plate 520 where the weak portion 522 is formed.
- the lowest point of the bent portion 514 that is, a trough, may correspond to the second portion of the lower plate 520.
- the flow rate per unit length around the first part can be increased, and when the weak part 522 is opened, the cooling water of the cooling member 500 is ignited. It can be injected more rapidly towards the 1st battery cell 110a.
- FIG. 13 shows that the valley of the bent part 514 is positioned close to the second part of the lower plate 520, the valley of the bent part 514 is shown so that the cooling member 500 can hold a larger amount of cooling water. It is also possible to be spaced apart from the second part of the lower plate 520 . However, if the separation distance is too large, the total volume of the cooling member 500 may increase, which may increase the size of the battery module. may have to be designed.
- each layer of the cooling member 500 is shown as being positioned in the order of the first layer 524, the second layer 526, and the top plate 510, but the second layer 526, the first It may also be possible to place the layer 524 and the top plate 510 in that order.
- the second layer 526 is positioned below the first layer 524 , the lower surface of the cooling member 500 may have a protruding shape due to the second layer 526 .
- the second layer 526 forming the lower surface of the cooling member 500 may be located close to or in contact with the battery cell, the second layer 526, the first layer 524 and the upper plate 510 When positioned in the order of, the second layer 526 may have an effect of promoting heat dissipation of the battery cell.
- the thickness of each layer may be appropriately designed to have strength over a predetermined range while minimizing the overall volume.
- the top plate 510 may be referred to as a third layer and may be made of aluminum.
- the third layer is formed of aluminum
- the upper plate 510 may preferably be formed to a thickness of 1.0 to 2.0 mm, 1.3 to 1.7 mm, or 1.5 mm.
- the second layer 526 included in the lower plate 520 may be preferably formed to a thickness of 1.0 to 1.5 mm, 1.2 to 1.4 mm, or 1.3 mm.
- the first layer 524 may have to be formed thin enough to have the characteristics of the weak portion 522, and specifically may have a thickness of 0.03 to 0.07 mm or 0.04 to 0.06 mm.
- cooling member 500 having three layers various types of processes may be applied to interlayer bonding. Since cooling water is located in the cooling member 500, the three layers need to be firmly bonded.
- the combination of the three layers may be formed through a welding process.
- the combination of the three layers may be formed through a rolling process.
- formation of the upper plate 510 may be somewhat limited.
- the materials of the three layers may be different, or may be the same or similar to each other. Since the melting point or strength is different depending on the material, the material may have to be selected according to the manufacturing method or the manufacturing method.
- the first layer 524 when the bonding of the layers is formed through brazing, the first layer 524 includes 3000-series aluminum and the second layer 526 includes 3000-series and 4000-series aluminum.
- the third layer which is the clad metal and the upper plate 510, may be 3000 series aluminum.
- positions of the first layer 524 and the second layer 526 may be interchanged.
- the material of the second layer 526 and the top plate 510 combined with the first layer 524 is limited according to the physical properties of the first layer 524. It can be.
- the first layer 524 may include 3000-series aluminum
- the second layer 526 and the upper plate 510 may include a clad metal including 3000-series/4000-series aluminum.
- the first layer 524 may include 3000 series/4000 series clad metal
- the second layer 526 and the upper plate 510 may include 3000 series aluminum.
- the battery pack 1000 of the embodiment described with reference to FIGS. 14 and 15 may include all of the contents of FIGS. 1 to 13 other than those mentioned below. Therefore, in order to minimize redundant description, the above-mentioned contents related to the cooling member 500 will be omitted.
- FIG. 14 is an exploded perspective view illustrating a battery pack according to still another embodiment of the present invention.
- 15 is a perspective view of a battery module included in the battery pack according to FIG. 14 .
- a battery pack 1000 includes at least one battery module 100, a pack frame 200 accommodating the battery module 100, and the inside of the pack frame 200.
- a resin layer 300 formed on the surface, an end plate 400 closing the open surface of the pack frame 200, and a cooling member 500 disposed between the pack frame 200 and the battery cell stack 120 can include
- the components included in the battery pack 1000 are not limited thereto, and depending on the design, the battery pack 1000 may be provided with some of the above components omitted, and other components not mentioned may be provided. It may also be provided as an add-on.
- the battery module 100 provided in this embodiment may have a module-less structure in which a module frame is omitted.
- conventional battery packs have a double assembly structure in which a battery cell stack and various parts connected thereto are assembled to form a battery module, and a plurality of battery modules are accommodated in the battery pack.
- the battery module includes a module frame forming its outer surface, conventional battery cells are doubly protected by the module frame of the battery module and the pack frame of the battery pack.
- this double assembly structure not only increases the manufacturing cost and manufacturing process of the battery pack, but also has a disadvantage in that reassembly is poor when defects occur in some battery cells.
- a cooling member such as a cooling member
- a heat transfer path between the battery cell and the cooling member becomes somewhat complicated.
- the battery module 100 of the present embodiment may be provided in the form of a 'cell block' in which the module frame is omitted, and the battery cell stacks 120 included in the cell block are the pack frame of the battery pack 1000 ( 200) can be directly coupled to.
- the structure of the battery pack 1000 can be simplified, advantages in terms of manufacturing cost and manufacturing process can be obtained, and weight reduction of the battery pack can be achieved.
- the battery module 100 without a module frame may be referred to as a 'cell block' for distinction from a battery module having a module frame.
- the battery module 100 is a general term for having a battery cell stack 120 segmented into predetermined units for modularization regardless of the presence or absence of a module frame, and the battery module 100 is a conventional It should be interpreted as including both a phosphorus battery module and a cell block.
- the battery module 100 of this embodiment is a battery cell stack 120 in which a plurality of battery cells 110 are stacked along one direction, and is located at both ends of the battery cell stack 120 in the stacking direction.
- a side plate 130, a holding strap 140 that wraps around the circumference of the side plate 130 and the battery cell stack 120 to fix the shape, and a bus bar covering the front and rear surfaces of the battery cell stack 120 Frame 150 may be included.
- the battery module 100 provided in the form of a cell block is shown, but the content of this drawing is applied to the battery module 100 having a sealed structure having a module frame to the battery pack 1000 of this embodiment. cases are not excluded.
- Each battery cell 110 may include an electrode assembly, a cell case, and an electrode lead protruding from the electrode assembly.
- the battery cell 110 may be provided in a pouch type or prismatic shape that can maximize the number of stacks per unit area.
- the battery cell 110 provided in the form of a pouch may be manufactured by accommodating an electrode assembly including a positive electrode, a negative electrode, and a separator in a cell case of a laminate sheet and then heat-sealing a sealing portion of the cell case.
- FIGS. 14 and 15 it is shown that the anode lead and the cathode lead of the battery cell 110 protrude in opposite directions, but this is not necessarily the case, and it is also shown that the electrode leads of the battery cell 110 protrude in the same direction. It is possible.
- the battery cell stack 120 may include a plurality of electrically connected battery cells 110 stacked along one direction.
- the direction in which the plurality of battery cells 110 are stacked (hereinafter referred to as 'stacking direction') may be the y-axis direction (or -y-axis direction) as shown in FIGS. 14 and 15, and hereinafter, the 'axis direction'.
- the expression 'direction' may be interpreted as including both +/- directions).
- electrode leads of the battery cells 110 may be positioned on one side or one side and the other side facing the one side of the battery cell stack 120 .
- the surface on which the electrode leads are located in the battery cell stack 120 may be referred to as the front or rear surface of the battery cell stack 120, and in FIGS. 14 and 15, the front and rear surfaces of the battery cell stack 120 The back side is shown with two faces facing each other on the x-axis.
- the side on which the outermost battery cell 110 is located in the battery cell stack 120 may be referred to as the side of the battery cell stack 120, and in FIGS. 14 and 15, the battery cell stack 120 The side is shown as two faces facing each other on the y-axis.
- the side plate 130 may be provided to maintain the overall shape of the battery cell stack 120 .
- the side plate 130 is a plate-shaped member, and can supplement the rigidity of the cell block instead of the module frame.
- the side plates 130 may be disposed at both ends of the battery cell stack 120 in the stacking direction, and may contact the outermost battery cells 110 on both sides of the battery cell stack 120 .
- the side plate 130 may be made of various materials and may be provided through various manufacturing methods.
- the side plate 130 may be a plastic material manufactured by injection molding.
- the side plate 130 may be made of a leaf spring material.
- the side plate 130 may be made of a material having elasticity so that its shape may be partially deformed in response to a volume change of the battery cell stack 120 due to swelling.
- the holding strap 140 may be for fixing the position and shape of the side plates 130 at both ends of the battery cell stack 120 .
- the holding strap 140 may be a member having a length and a width.
- the battery cell stack 120 may be positioned between the two side plates 130 in contact with the outermost battery cell 110, and the holding strap 140 holds the battery cell stack 120. It is possible to connect the two side plates 130 by crossing. Through this, the holding strap 140 can prevent the distance between the two side plates 130 from increasing beyond a certain range, and thus the overall shape of the cell block can be maintained within a certain range.
- the holding strap 140 may have hooks at both ends in the longitudinal direction for stable coupling with the side plate 130 . Hooks may be formed by bending both ends of the holding strap 140 in the longitudinal direction. Meanwhile, a locking groove may be formed on the side plate 130 at a position corresponding to the hook, and the holding strap 140 and the side plate 130 may be stably coupled through a combination of the hook and the locking groove.
- the holding strap 140 may be provided with various materials or through various manufacturing methods.
- the holding strap 140 may be made of a material having elasticity, and through this, a volume change of the battery cell stack 120 according to swelling may be allowed within a certain range.
- the holding strap 140 is for fixing the relative position between the side plate 130 and the battery cell stack 120, and if its purpose as a 'fixing member' is achieved, it is provided in a form different from that shown.
- the fixing member may be provided in the form of a long bolt that can cross between the two side plates 130, that is, a long bolt.
- the side plate 130 may be provided with a groove into which a long bolt can be inserted, and the long bolt can fix the relative positions of the two side plates 130 by simultaneously engaging the two side plates 130 through the groove.
- the long bolt may be provided at an edge of the side plate 130, preferably at a position close to a vertex of the side plate 130.
- the holding strap 140 is replaced with the aforementioned long bolt, but it is also possible that both the holding strap 140 and the long bolt are provided in the cell block.
- the bus bar frame 150 is located on one surface of the battery cell stack 120, covers one surface of the battery cell stack 120, and guides the connection between the battery cell stack 120 and external devices. It may be for
- the bus bar frame 150 may be located on the front or rear surface of the battery cell stack 120 .
- Two bus bar frames 150 may be provided to be positioned on the front and rear surfaces of the battery cell stack 120 .
- a bus bar may be mounted on the bus bar frame 150, and through this, electrode leads of the battery cell stack 120 may be connected to the bus bar so that the battery cell stack 120 may be electrically connected to an external device.
- the bus bar frame 150 may include an electrically insulating material.
- the bus bar frame 150 may limit the contact of the bus bar with other parts of the battery cells 110 other than the parts bonded to the electrode leads, and prevent an electrical short circuit from occurring.
- the pack frame 200 may be for protecting the battery module 100 and electrical components connected thereto from external physical impact.
- the pack frame 200 may accommodate the battery module 100 and electrical components connected thereto in the inner space of the pack frame 200 .
- the pack frame 200 includes an inner surface and an outer surface, and the inner space of the pack frame 200 may be defined by the inner surface.
- the number of battery modules 100 accommodated in the pack frame 200 may be plural.
- the plurality of battery modules 100 may be referred to as 'module assembly'.
- Module assemblies may be arranged in rows and columns within the pack frame 200 .
- a 'row' may mean a set of battery modules 100 arranged in one direction
- a 'column' may mean a set of battery modules 100 arranged in a direction perpendicular to the one direction.
- the battery modules 100 may be disposed along the stacking direction of the battery cell stack as shown in FIG. 1 to form a single row or column to form a module assembly.
- the pack frame 200 may be provided in a hollow shape open along one direction.
- a plurality of battery modules 100 are continuously positioned along the stacking direction of the battery cells 110, and the pack frame 200 has a hollow shape open along the above-described stacking direction.
- the pack frame 200 may vary.
- the pack frame 200 may include a lower frame 210 and an upper frame 220 .
- the lower frame 210 may be provided in a plate shape
- the upper frame 220 may be provided in a U-shape.
- At least one battery module 100 may be disposed on the plate-shaped lower frame 210, and a U-shaped upper frame 220 may be provided to cover the upper surface and two surfaces of the module assembly on the x-axis. .
- the pack frame 200 may include a portion having high thermal conductivity in order to rapidly dissipate heat generated in the internal space to the outside.
- the pack frame 200 may be made of a metal having high thermal conductivity, and examples thereof may include aluminum, gold, silver, copper, platinum, or an alloy including the same.
- the pack frame 200 may partially have electrical insulation, and an insulation film may be provided or an insulation coating may be applied to a location where insulation is required.
- a portion of the pack frame 200 to which an insulating film or an insulating coating is applied may be referred to as an insulating portion.
- a resin layer 300 may be provided between the battery module 100 and the inner surface of the pack frame 200 .
- the resin layer 300 may be provided between the bottom surface of the battery module 100 and the lower frame 210 .
- the resin layer 300 may be provided between the upper surface of the battery module 100 and the upper frame 220 .
- the resin layer 300 may be provided between the cooling member 500 to be described later and the upper frame 220 .
- the resin layer 300 may be formed by injecting resin between the battery cell stack 120 and one of the inner surfaces of the pack frame 200 . However, this is not necessarily the case, and the resin layer 300 may be a member provided in a plate shape.
- the resin layer 300 may be made of various materials, and functions of the resin layer 300 may vary depending on the material.
- the resin layer 300 may be formed of an insulating material, and electron transfer between the battery module 100 and the pack frame 200 may be prevented through the insulating resin layer 300 .
- the resin layer 300 may be formed of a thermally conductive material.
- the resin layer 300 made of a thermally conductive material transfers the heat generated from the battery cell 110 to the pack frame 200, so that the heat can be released/transmitted to the outside.
- the resin layer 300 may include an adhesive material, through which the battery module 100 and the pack frame 200 may be fixed to each other.
- the resin layer 300 may be provided to include at least one of a silicone-based material, a urethane-based material, and an acrylic-based material.
- the end plate 400 may be to protect the battery module 100 and electrical components connected thereto from external physical impact by sealing the open surface of the pack frame 200 .
- Each corner of the end plate 400 may be coupled to a corresponding corner of the pack frame 200 by welding or the like.
- Two end plates 400 may be provided to seal the two open surfaces of the pack frame 200 and may be made of a metal material having a predetermined strength.
- An opening 410 may be formed in the end plate 400 to expose an inlet/outlet port 530 of the cooling member 500, which will be described later, and connect low voltage (LV) or high voltage (HV) to an external device.
- a connector 420 for connection may be mounted.
- the cooling member 500 may cool the inside of the battery pack 1000 by dissipating heat generated from the battery cells 110 .
- the cooling member 500 may cool the inside of the battery pack 1000 by dissipating heat generated from the battery cells 110 .
- FIG. 14 shows that the cooling member 500 is provided outside the battery module 100, this is not necessarily the case, and the cooling member 500 may also be disposed inside the battery module 100.
- the battery module 100 may have a closed structure having a module frame or an open structure such as a cell block.
- the cooling member 500 may be integrally provided with the battery pack 1000 or the battery module 100.
- the upper plate 510 of the cooling member 500 is replaced by the upper surface of the pack frame 200, and the pack frame 200
- the cooling member 500 may be formed by combining the upper surface of the cooling member 500 with the lower plate 520 of the cooling member 500 .
- the cooling member 500 when the cooling member 500 is integrally provided with the battery module 100, the upper plate 510 of the cooling member 500 is replaced by the upper surface of the frame of the battery module 100, and the battery module
- the cooling member 500 may be formed by combining the upper surface of the frame of the frame 100 and the lower plate 520 of the cooling member 500 . In this way, when the cooling member 500 is integrated with the battery pack 1000 or the battery module 100, the weight of the battery pack 1000 or the battery module 100 through omission of some members, cost reduction, or simplification of the internal structure, etc. effect can be achieved.
- the battery module 100 of this embodiment has been described as including the water-cooled cooling member 500, this description does not exclude that the battery module 100 may include an air-cooled cooling member. Therefore, it should be noted that the battery module 100 of this embodiment may include both air-cooled and water-cooled cooling members 500 at the same time.
- FIG. 16 is a perspective view showing a cooling member according to still another embodiment of the present invention.
- 17 is a top view showing a cooling member according to still another embodiment of the present invention.
- 18 is a top view of a lower plate included in the cooling member of FIG. 16;
- 19 is a top view of a main body included in the cooling member of FIG. 16;
- FIG. 20 is a view showing the coupling of the lower plate, body, and cooling hose included in the cooling member of FIG. 16;
- FIG. 21 shows the cooling member of FIG. 17 cut along the line A-A, and shows cooling water flowing into or flowing out of the main body and cooling hose.
- FIG. 22 is a cut A-A view of the cooling member of FIG. 17, and is a view illustrating the injection of cooling water by a cooling hose when a battery cell is ignited.
- the cooling member 600 of this embodiment may be provided to lower the internal temperature of a battery module or battery pack including battery cells.
- the cooling member 600 may be a water-cooled cooling member 600 into which refrigerant or cooling water is injected. Since the cooling member 600 is provided in a water-cooled manner, the cooling efficiency of the cooling member 600 can be maintained uniformly, and the battery cells in the battery module or battery pack can be evenly cooled.
- the cooling water used in the cooling member 600 may use one or a mixture thereof known in the art, as long as it can release heat from the battery cells by moving along the flow path inside the cooling member 600. You are free to use any of these.
- the cooling member 600 may be disposed on one surface of the battery cell stack to dissipate heat from the battery cells.
- the cooling member 600 may be disposed parallel to the stacking direction of the battery cell stack to be positioned close to the plurality of battery cells of the battery cell stack. Specifically, the cooling member 600 may be located above the battery cell stack.
- the size of the cooling member 600 may be matched to the size of the battery cell stack to which the cooling member 600 is applied.
- the cooling member 600 may be provided to correspond to one battery cell stack.
- the length of the cooling member 600 is matched to the length of the battery cell stack or has a small margin to increase or decrease the length of the battery cell stack. It is formed small, and the width of the cooling member 600 may be formed larger or smaller according to the width of the battery cell stack or with a slight margin.
- the cooling member 600 may be provided to correspond to the multiplicity of battery cell stacks, and in this case, the length and width of the cooling member 600 are matched with the length and width of the multiplicity of battery cell stacks or slightly It can be made large or small with a margin.
- the cooling member 600 may be located inside the battery module, but may also be located inside the battery pack from the outside of the battery module.
- the cooling member 600 includes a lower plate 620, an inlet/outlet port 630 for injecting coolant into the cooling member 600, a main body 640 mounted on the upper surface of the lower plate 620 and accommodating the coolant, and a cooling hose. 650 and a fixing member 660 fixing them.
- the body 640 is mounted on the upper surface of the lower plate 620
- the cooling hose 650 is mounted in the accommodating portion 648 of the body 640
- the fixing member 660 is mounted on the lower plate 620. )
- the body 640 and the cooling hose 650 are fixed, so that the cooling member 600 can be manufactured.
- the cooling member 600 of this embodiment can secure watertightness through the above-described structure, simplify the manufacturing process, and supply cooling water to the right place at the right time when the battery cell is ignited.
- a liquid such as cooling water
- it may be effective to inject a liquid such as cooling water into the battery module or battery pack. Since providing a liquid tank inside the battery module or battery pack may increase the volume of the battery module and battery pack, conventionally, a separate water tank is provided outside the battery module and the battery pack, and the battery is stored through a sensor. Cooling water or the like was injected into the battery module or battery pack through a nozzle or the like extending from the water tank only when ignition of the cell was confirmed.
- the water tank provided outside the battery module and the battery pack is not only bulky, but also requires a user to separately manage it.
- the conventional water supply system must have a separate control unit or communication unit for determining whether or not to input cooling water, and errors must not occur in their operation. It became. Even after the injection of cooling water is determined, if the path from the water tank to the battery module or the battery cell inside the battery pack is rather long, it is difficult to quickly provide cooling water from the water tank to the battery cell. It was difficult to stop the continuous thermal runaway phenomenon.
- an opening is formed in the lower plate 620 of the cooling member 600 so that cooling water can be immediately supplied to the fire place when the battery module or battery pack is ignited, and the cooling hose 650 corresponds to the opening. ) can be placed.
- a member that melts or breaks at a predetermined temperature or pressure or higher may be filled or inserted to seal the opening.
- the cooling water of the cooling member 600 directly contacts the lower plate 620, the cooling water may leak through a gap between the opening of the lower plate 620 and a member sealing it, and thus the cooling member ( 600) may greatly deteriorate.
- manufacturing the lower plate 620 to include two materials having different physical properties involves a complicated manufacturing process, there is a problem in that manufacturing time and manufacturing cost increase.
- the cooling member 600 of this embodiment by isolating the cooling water between the main body 640 and the cooling hose 650, it is possible to minimize the decrease in watertightness caused by the opening 622 of the lower plate 620.
- the main body 640 and the cooling hose 650 are applied to the cooling member 600, the manufacturing process of the cooling member 600 is simplified, and manufacturing time and cost can be reduced.
- the lower plate 620 may be provided in a plate shape.
- a main body 640 through which cooling water flows and a cooling hose 650 may be mounted on the lower plate 620 .
- the lower plate 620 may be provided in a plate shape to support the main body 640 or the like.
- the lower plate 620 may include at least one opening 622 .
- the opening 622 may be for injecting internal cooling water into the battery cell by heat or pressure generated by ignition when the battery cell is ignited.
- a plurality of openings 622 may be provided along a straight line parallel to the short side or long side of the lower plate 620, and the cooling member 600 has a plurality of openings 622 at an unspecified position within the battery module or battery pack. Cooling water can be injected in response to a fire occurring in In this regard, refer to FIG. 22 to be described later.
- a protrusion 624 extending from one side of the lower plate 620 and continuously positioned along one edge of the lower plate 620 may be formed around the lower plate 620 .
- the protrusion 624 may contact or be disposed close to the electrode lead of each battery cell stack or the bus bar connected to the electrode lead. Since an electrode lead or bus bar providing electrical connection in a battery module or battery pack is a component that easily generates heat, if the above-described protrusion promotes heat dissipation of the electrode lead or bus bar, the temperature rise of the battery cell can be more effectively prevented.
- a barrier 626 may be formed on the lower plate 620 .
- the barrier 626 may extend along the longitudinal direction of the cooling member 600 from the center in the width direction of the cooling member 600 except for a predetermined section.
- the main body 640 can be mounted in place by the barrier 626, and the fixing member 660 can be stably fixed.
- the width direction of the cooling member 600 may be a direction parallel to the short side of the cooling member 600 .
- the longitudinal direction of the cooling member 600 may be a direction parallel to the long side of the cooling member 600 .
- the lower plate 620 may be a part of the cooling member 600 positioned closest to the battery cell.
- the lower plate 620 may be made of a material having high thermal conductivity to promote heat dissipation of the battery cell.
- the lower plate 620 of the cooling member 600 may be made of a metal having high rigidity, and specific examples thereof include aluminum, gold, silver, copper, platinum, or an alloy including these.
- Cooling water may be supplied through the inlet port 632 located side by side and discharged through the outlet port 634 .
- the inlet port 632 and the outlet port 634 may be located parallel to one end side of the cooling member 600 . This may be to simplify the design of the inflow and outflow of cooling water supplied from the outside of the battery module or battery pack. Also, this may be to minimize a temperature difference between the inlet port 632 and the outlet port 634 . Specifically, cooling water introduced into the inlet port 632 may have the lowest temperature, and cooling water discharged through the outlet port 634 may have the highest temperature.
- the cooling member 600 may have uniform heat dissipation performance as a whole.
- the main body 640 may provide cooling water passages for heat dissipation of the battery cells. Cooling water injected through the inlet port 632 may be accommodated in the body 640 , and cooling water accommodated in the body 640 may be discharged through the outlet port 634 . As cooling water flows in or out of the main body 640, the cooling member 600 can be maintained at a relatively constant temperature. Cooling water in the main body 640 may be designed to be continuously circulated by being connected to an external heat exchanger connected to the inlet/outlet port 630 to maintain the constant temperature.
- the lower plate 620 cooled by the body 640 may promote heat dissipation of the battery cells.
- the main body 640 may be made of a material having high thermal conductivity, and through this, heat of the lower plate 620 may be rapidly absorbed.
- the main body 640 may be made of a material having sufficient rigidity to withstand the pressure and weight of the cooling water accommodated therein.
- the body 640 may be made of the same material as that of the lower plate 620 or a material similar thereto.
- the material of the main body 640 may be, for example, aluminum, gold, silver, copper, platinum or an alloy including these.
- the main body 640 may be mounted at a position where the barrier 626 is not formed on the lower plate 620 .
- the outer shape of the main body 640 may be similar to the outer shape of the lower plate 620 except for the protrusion 624 .
- the main body 640 may have a square tubular shape, and may be divided into two parts corresponding to the inlet port 632 and the outlet port 634 in consideration of the position of the barrier 626 . Through this, the main body 640 may form a U-shaped passage.
- the main body 640 has a first portion 642 extending from the inlet port 632 along a straight line parallel to the longitudinal direction of the cooling member 600, clockwise or counterclockwise from the end of the first portion 642. and a third portion extending along a straight line parallel to the longitudinal direction of the cooling member 600 toward the outlet port 634 from the distal end of the second portion 644. Portion 646 may be included.
- the longitudinal direction of the cooling member 600 may be a direction parallel to the long side of the cooling member 600 .
- the body 640 may include a receiving portion 648 to which the cooling hose 650 is mounted.
- the accommodating portion 648 may mean an accommodating space in the main body 640 in which the cooling hose 650 is mounted.
- the accommodating portion 648 may be a long groove extending along the longitudinal direction of the cooling member 600, and the cross section of the accommodating portion 648 may be polygonal such as a square or circular. Both ends of the cooling hose 650 in the longitudinal direction may be connected to both ends of the accommodating portion 648 in the longitudinal direction. Both ends of the cooling hose 650 may be inserted into both ends of the accommodating part 648 in the longitudinal direction. Connections between both ends of the accommodating portion 648 in the longitudinal direction and both ends of the cooling hose 650 may be sealed to ensure watertightness.
- a gasket is provided at a connection between the cooling hose 650 and the accommodating portion 648, and watertightness between the two members can be secured through the gasket.
- extensions extending in a circumferential direction from the ends of the cooling hose 650 may be formed at both ends of the cooling hose 650, and the extensions may be inserted into the ends of the receiving portion 648 to form a main body 640. By being located on the inner side of the cooling hose 650 and the body 640 can supplement the coupling.
- a first extension extending in a circumferential direction and a second extension spaced apart from the first extension may be formed at an end of the cooling hose 650 .
- the first expansion part may be located inside the main body 640
- the second expansion part may be located outside the main body 640
- the two expansion parts come into close contact with the main body 640, so that the cooling hose 650 and the main body 640
- the coupling between them may be more complemented.
- protrusions may be formed on the expansion part, the first expansion part, or the second expansion part, and may be more tightly coupled to one side surface of the main body 640 through the projections.
- the cooling hose 650 may be connected to the main body 640 to provide a flow path for cooling water implementing heat dissipation of the battery cells. Cooling water introduced from the inlet/outlet port 630 may move to the cooling hose 650 . The cooling hose 650 may receive cooling water from the main body 640 located close to the inlet/outlet port 630 .
- the cooling hose 650 may be positioned to correspond to the opening 622 of the lower plate 620 . As shown in FIG. 18, when four rows of openings 622 are formed in the lower plate 620 along a straight line parallel to the longitudinal direction of the cooling member 600, the cooling hose 650 is provided in each row of the openings 622. Four may be provided to correspond to .
- the term 'row' may be a general term for openings 622 continuously positioned along a straight line parallel to the longitudinal direction of the cooling member 600 .
- the cooling hose 650 is melted or broken when an internal fire occurs, so that internal cooling water may be injected toward the battery cell.
- a part of the cooling hose 650 corresponding to the opening 622 is opened by melting or breaking, and through this, the cooling water is sprayed, ejected, and injected in the direction of gravity, thereby located at the lower side of the cooling member 600.
- a fire in a battery cell can be extinguished.
- the receiving portion 648 in which the cooling hose 650 is mounted should also be formed to correspond to the opening 622 of the lower plate 620.
- the cooling hose 650 may be made of a material that is more easily melted by heat or broken by pressure than the lower plate 620 made of metal.
- the cooling hose 650 may be made of a material having a melting point of 300 °C or less.
- the cooling hose 650 may be made of polyamide (PA).
- PA polyamide
- the cooling hose 650 may be made of a thermoplastic polymer resin having a melting point of 200 °C or less. Examples of the thermoplastic polymer resin include materials having a melting point of about 100° C. or more and 200° C. or less, such as high-density polyethylene (HDPE), polyethylene (PE), polypropylene (PP), and polyphenylene oxide (PPO).
- HDPE high-density polyethylene
- PE polyethylene
- PP polypropylene
- PPO polyphenylene oxide
- the main body 640 must be made of a material having sufficient rigidity to withstand the pressure of the cooling water flowing into the inside and maintain its shape, the main body 640 must be made of a material that is easily melted by heat or broken by pressure. This has a problem in that the overall durability of the cooling member 600 may be deteriorated. Therefore, it may be desirable to improve the performance of the entire cooling member 650 by configuring the cooling hose 650, which can be easily broken by heat, separately from the main body 640, as in the present embodiment.
- the fixing member 660 may supplement the rigidity of the cooling member 600 by fixing the lower plate 620, the main body 640, and the cooling hose 650.
- the fixing member 660 may fix the positions of the main body 640 and the cooling hose 650 through engagement with the lower plate 620 .
- the fixing member 660 may be provided in the form of a strap having a length.
- the fixing member 660 may be positioned parallel to the width direction of the cooling member 600 .
- a plurality of fixing members 660 may be provided along the longitudinal direction of the cooling member 600, and the plurality of fixing members 660 may be arranged at regular intervals.
- the fixing member 660 may be made of a material with high rigidity to maintain the shape of the cooling member 600, and may be made of metal, for example.
- the fixing member 660 may be coupled to both ends of the cooling member 600 in the width direction.
- the fixing member 660 may be coupled to the center of the cooling member 600 in the width direction.
- the fixing member 660 may include end coupling portions 662 formed at both ends of the fixing member 660 in the longitudinal direction and a central coupling portion 664 formed at the center of the fixing member 660 in the longitudinal direction.
- the terminal coupling portion 662 and the central coupling portion 664 may refer to portions of the cooling member 600 that are fastened through fastening members such as rivets.
- a fastener into which a fastening member can be inserted may be formed in the end coupling portion 662 and the central coupling portion 664 .
- the fixing member 660 may be coupled to both ends of the lower plate 620 in the width direction.
- the fixing member 660 may be coupled to the center of the lower plate 620 in the width direction.
- the end coupling portion 662 may be coupled with the protrusions 624 located at both ends of the lower plate 620 in the width direction.
- the central coupling part 664 may be coupled to the barrier 626 located at the center of the lower plate 620 in the width direction.
- the distal coupling portion 662 and the central coupling portion 664 may be formed to have a step with other portions of the fixing member 660 and may have a height slightly lower than other portions of the fixing member 660 .
- the end coupling portion 662 may be formed to have a larger step than the central coupling portion 664.
- the cooling member 600 can be manufactured to include two or more materials having different properties, and a structure of various materials and shapes, such as the cooling hose 650, can be used as the cooling member 600. ), and the design of the cooling member 600 can be easier and more diverse.
- the manufacturing method of the cooling member 600 described below includes all of the above-described cooling member 600, and detailed descriptions of overlapping contents are omitted.
- a method of manufacturing a cooling member includes preparing a lower plate 620, mounting a main body 640 on an upper surface of the lower plate 620, and A step of mounting the cooling hose 650 to the cooling hose 650 and a step of combining the fixing member 660 with the lower plate 620 may be included.
- Preparing the lower plate 620 may include forming an opening 622 in the lower plate 620, and according to an embodiment, mounting the inlet/outlet port 630 to the lower plate 620 may be further performed.
- Mounting the body 640 on the lower plate 620 is a process of bonding the lower plate 620 and the body 640, and may be performed by a bonding process such as welding.
- a welding process is used to join the lower plate 620 and the main body 640, the more similar the materials of the lower plate 620 and the main body 640 are, the more deformation or damage of some members depending on the welding temperature can be minimized, and cooling Dimensional stability of the member 600 can be secured.
- Mounting the cooling hose 650 to the main body 640 is a step of inserting the cooling hose 650 into the accommodating portion 648 of the main body 640, both ends of the cooling hose 650 to the accommodating portion 648 ) may include a step of connecting with both ends of.
- a connection portion between the cooling hose 650 and the accommodating portion 648 may be sealed.
- the step of combining the fixing member 660 with the lower plate 620 is the step of combining the end coupling part 662 of the fixing member 660 with both ends of the lower plate 620 and the central coupling part of the fixing member 660 ( 664 with the center of the lower plate 620.
- both ends of the lower plate 620 mean ends in the width direction, and protrusions 624 may be positioned at both ends of the lower plate 620 .
- the center of the lower plate 620 means the center in the width direction, and the barrier 626 may be located at the center of the lower plate 620 .
- cooling member 600 may be mounted in a battery module or battery pack.
- a battery module includes a battery cell stack made of a plurality of battery cells and a module frame accommodating them, and a cooling member 600 is provided between the module frame and the battery cell stack.
- a battery pack according to another embodiment of the present invention may be provided in various forms.
- a battery pack according to another embodiment of the present invention may include at least one or more battery modules described above.
- the battery pack of the present example may include a pack frame and at least one battery module mounted in the pack frame, and the battery module includes a battery cell stack, a module frame, and a cooling member positioned between the battery cell stack and the module frame. can do.
- a battery pack includes at least one battery module including a battery cell stack and a module frame accommodating the same, a cooling member 600, and a battery module and a cooling member 600. It may include a pack frame for accommodating. That is, in this example, the cooling member 600 may be provided outside the battery module. The cooling member 600 may be provided between the module frame and the pack frame of the battery module, and cooling water may be injected toward the battery module when the inside and outside of the battery module is ignited.
- a battery pack may include a battery cell stack and a pack frame accommodating the battery cell stack, and a cooling member 600 may be provided between the battery cell stack and the pack frame. there is.
- the battery cell stack may be provided in a module-less structure that is not sealed by a module frame or the like.
- the battery cell stack may be provided in an open structure.
- the battery cell stack may be provided in a state in which its appearance is maintained through a fixing member such as a side plate or a holding strap, and this type of battery cell stack may be referred to as a cell block.
- battery packs may be formed in a double assembly structure in which a battery cell stack and various parts connected thereto are assembled to form a battery module, and a plurality of battery modules are accommodated in the battery pack again.
- the battery module includes a module frame forming its outer surface, conventional battery cells are doubly protected by the module frame of the battery module and the pack frame of the battery pack.
- this double assembly structure not only increases the manufacturing cost and manufacturing process of the battery pack, but also has a disadvantage in that reassembly is poor when defects occur in some battery cells.
- a cooling member such as a cooling member
- a heat transfer path between the battery cell and the cooling member becomes somewhat complicated.
- the battery cell stack of this embodiment may be provided in a non-sealed structure by the module frame, and may be directly coupled to the pack frame of the battery pack.
- the structure of the battery pack can be simplified, advantages in manufacturing cost and manufacturing process can be obtained, and weight reduction of the battery pack can be achieved.
- the battery cell stack since the battery cell stack is provided in a module-less structure, the battery cell stack can be positioned closer to the cooling member 600 in the pack frame, and heat dissipation by the cooling member 600 can be more easily achieved. can
- the battery pack according to an embodiment of the present invention adds a battery management system (BMS) and/or a cooling device that manages the temperature or voltage of the battery.
- BMS battery management system
- a cooling device that manages the temperature or voltage of the battery.
- a battery pack according to an embodiment of the present invention can be applied to various devices.
- a device to which the battery pack is applied may be a vehicle such as an electric bicycle, an electric vehicle, or a hybrid vehicle.
- the above-described device is not limited thereto, and the battery pack according to the present embodiment may be used in various devices other than the above-described examples, which also fall within the scope of the present invention.
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Abstract
Description
Claims (28)
- 복수의 전지셀들이 적층된 전지셀 적층체의 상부에 위치하는 냉각 부재에 있어서,상부판, 하부판, 상기 상부판과 상기 하부판 사이의 내부 공간에 내장된 냉각수를 포함하고,상기 하부판은 취약부가 형성된 제1 부분, 상기 취약부가 형성되지 않은 제2 부분을 포함하며,상기 제1 부분의 두께 값은 상기 제2 부분의 두께 값 보다 작은 냉각 부재.
- 제1항에서,상기 취약부는 장변과 단변을 가지고,상기 장변은 상기 전지셀들의 적층 방향을 따라 연장되는 냉각 부재.
- 제1항에서,상기 제1 부분의 두께 값은, 상기 제2 부분의 두께 값의 절반 이하인 냉각 부재.
- 제1항에서,상기 제1 부분의 두께는 0.03 내지 0.07mm인 냉각 부재.
- 제1항에서,상기 취약부는 제1 취약부 및 상기 제1 취약부와 이격된 제2 취약부를 포함하고,상기 제1 취약부와 상기 제2 취약부의 두께 값은 실질적으로 동일한 냉각 부재.
- 제1항에서,상기 하부판은 서로 두께가 상이한 제1 층 및 제2 층을 접합합으로써 형성되고,상기 제1 부분의 두께는 상기 제1 층의 두께와 대응되고,상기 제2 부분의 두께는 상기 제1 층 및 상기 제2 층의 두께와 대응되는 냉각 부재.
- 제6항에서,상기 제1 층 및 제2 층 중 하나는 클래드 금속을 포함하는 냉각 부재.
- 제6항에서,상기 상부판, 상기 제1 층 및 제2 층 중 적어도 하나는 클래드 금속을 포함하는 냉각 부재.
- 제6항에서,상기 제1 층과 제2 층은 브레이징 공정을 통해 접합되는 냉각 부재.
- 제6항에서,상기 상부판, 상기 제1 층과 제2 층은 브레이징 공정을 통해 접합되는 냉각 부재.
- 제1항에서,상기 상부판은 굴곡부를 포함하고,상기 굴곡부의 마루는 상기 제1 부분과 대응되고,상기 굴곡부의 골은 상기 제2 부분과 대응되는 냉각 부재.
- 복수의 전지셀들이 적층된 전지셀 적층체의 상부에 위치하는 냉각 부재에 있어서,다수의 개구부가 형성된 하부판,냉각수의 유로를 제공하는 본체, 및상기 하부판과 상기 본체를 고정하는 고정 부재를 포함하고,상기 본체에는 적어도 하나의 냉각 호스가 장착되고,상기 냉각 호스는 소정의 온도 또는 압력 이상에서 용융되거나 파단되는 냉각 부재.
- 제12항에서,상기 냉각 호스는 상기 하부판의 개구와 대응되도록 위치하는 냉각 부재.
- 제12항에서,상기 냉각 호스는 상기 냉각 부재의 길이 방향을 따라 연장되는 형상을 가지는 냉각 부재.
- 제12항에서,상기 냉각 호스는 300 ℃ 이하의 용융점을 가지는 소재로 제조되는 냉각 부재.
- 제12항에서,상기 본체에는 상기 냉각 호스를 수용하기 위한 수용부가 구비되는 냉각 부재.
- 제16항에서,상기 냉각 호스의 길이 방향상 양 말단은 상기 수용부의 길이 방향상 양 말단과 각각 연결되는 냉각 부재.
- 제12항에서,상기 하부판의 중앙에는 상기 냉각 부재의 길이 방향상 연장되는 둔턱이 형성되고, 상기 본체는 상기 하부판에서 상기 둔턱이 형성되지 않은 위치에 장착되는 냉각 부재.
- 제12항에서,상기 고정 부재는 스트랩의 형태로 제공되며, 상기 냉각 부재의 폭 방향과 평행하게 위치하는 냉각 부재.
- 제19항에서,상기 고정 부재는 상기 하부판의 폭 방향상 양 말단과 결합하는 말단 결합부 및 상기 하부판의 폭 방향상 중앙과 결합하는 중앙 결합부를 포함하는 냉각 부재.
- 제20항에서,상기 말단 결합부 및 상기 중앙 결합부는 상기 고정 부재의 다른 부분과 단차를 가지도록 형성되는 냉각 부재.
- 제12항에서,상기 냉각 부재는 내부 공간에 냉각수를 주입하기 위한 인렛 포트 및 아울렛 포트를 더 포함하고,상기 인렛 포트 및 상기 아울렛 포트는 외부의 열교환기와 연결되며,상기 인렛 포트 및 상기 아울렛 포트를 통해 상기 냉각 부재의 냉각수가 순환되는 냉각 부재.
- 제22항에서,상기 본체는 상기 인렛 포트 및 상기 아울렛 포트와 각각 대응되는 부분으로 분기된 형상을 가지는 냉각 부재.
- 제1항 또는 제12항에 따른 냉각 부재를 포함하는 전지 모듈.
- 제24항에서,상기 냉각 부재의 상부판은 상기 전지 모듈의 외형을 형성하는 모듈 프레임의 상면과 일체화된 전지 모듈.
- 제1항 또는 제12항에 따른 냉각 부재를 포함하는 전지 팩.
- 제26항에서,상기 전지 팩은 개방형 구조의 전지 모듈을 포함하는 전지 팩.
- 제26항에서,상기 냉각 부재의 상부판은 상기 전지 팩의 외형을 형성하는 팩 프레임의 상면과 일체화된 전지 팩.
Priority Applications (5)
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CN202280021362.1A CN116998048A (zh) | 2021-07-22 | 2022-07-22 | 冷却构件以及包括所述冷却构件的电池模块和电池组 |
JP2023552348A JP2024508007A (ja) | 2021-07-22 | 2022-07-22 | 冷却部材、これを含む電池モジュールおよび電池パック |
US18/280,799 US20240145807A1 (en) | 2021-07-22 | 2022-07-22 | Cooling member, and battery module and battery pack including the same |
AU2022315107A AU2022315107A1 (en) | 2021-07-22 | 2022-07-22 | Cooling member, and battery module and battery pack including the same |
EP22846297.4A EP4293798A1 (en) | 2021-07-22 | 2022-07-22 | Cooling member, and battery module and battery pack including same |
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KR1020210096683A KR20230015217A (ko) | 2021-07-22 | 2021-07-22 | 냉각 부재 및 이를 포함하는 전지 팩 |
KR10-2021-0096683 | 2021-07-22 | ||
KR10-2021-0165252 | 2021-11-26 | ||
KR1020210165252A KR20230077973A (ko) | 2021-11-26 | 2021-11-26 | 냉각 부재, 이를 포함하는 전지 모듈 및 전지 팩 |
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KR20190133689A (ko) * | 2017-04-05 | 2019-12-03 | 지멘스 악티엔게젤샤프트 | 냉각 시스템 및 방법 |
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- 2022-07-22 AU AU2022315107A patent/AU2022315107A1/en active Pending
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- 2022-07-22 JP JP2023552348A patent/JP2024508007A/ja active Pending
- 2022-07-22 US US18/280,799 patent/US20240145807A1/en active Pending
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KR20140037774A (ko) * | 2012-09-18 | 2014-03-27 | 독터. 인제니어. 하.체. 에프. 포르쉐 악티엔게젤샤프트 | 배터리 모듈 |
KR20170072129A (ko) * | 2015-12-16 | 2017-06-26 | 희성정밀 주식회사 | 전기 자동차용 배터리 스택용 쿨링 플레이트 제조 방법 및 이에 의해 제조된 쿨링 플레이트 |
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KR20180108282A (ko) * | 2017-03-24 | 2018-10-04 | 삼성에스디아이 주식회사 | 이차 전지 |
KR20190133689A (ko) * | 2017-04-05 | 2019-12-03 | 지멘스 악티엔게젤샤프트 | 냉각 시스템 및 방법 |
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AU2022315107A1 (en) | 2023-09-14 |
JP2024508007A (ja) | 2024-02-21 |
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