Battery pack and device including the same

Abstract

The present disclosure includes a battery pack and an apparatus including the same. A battery pack according to an embodiment of the present disclosure comprises: a first pack case in which a plurality of battery modules accommodating a battery cell stack are mounted; a second pack case provided to cover the battery module; and an inflow port provided at an upper end of the second battery pack case, in which the inflow port is connected to a flow path through which the fire extinguishing liquid injected from the outside is transferred.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2022-0143916 filed in the Korean Intellectual Property Office on November 1, 2022, the disclosure of which is incorporated herein by reference in its entirety.

[0003] The present disclosure relates to a battery pack and a device including the same, and more particularly, to a battery pack and a device including the same that facilitate fire extinguishing and ensure safety in the event of a fire. Background Art

[0004] As the technology of mobile devices develops and the demand for mobile devices increases, the demand for secondary batteries as energy sources is rapidly increasing. Therefore, many studies have been conducted on batteries that can meet various demands.

[0005] Secondary batteries have attracted much attention as energy sources for power drive devices such as electric bicycles, electric vehicles, and hybrid electric vehicles, and as energy sources for mobile devices such as mobile phones, digital cameras, and notebook computers.

[0006] In recent years, as the demand for large-capacity secondary battery structures (including the use of secondary batteries as energy storage sources) continues to grow, the demand for multi-module structured battery packs, which are components of battery modules in which multiple secondary batteries are connected in series and / or in parallel, has been growing.

[0007] Meanwhile, when a plurality of battery cells are connected in series or in parallel to configure a battery pack, a battery module consisting of at least one battery cell is usually configured first, and then the battery pack is configured by using at least one battery module and adding other components. Since the battery cells constituting such a medium or large battery module are composed of secondary batteries that can be charged and discharged, such high-output and high-capacity secondary batteries generate a large amount of heat during the charging and discharging process. As a result, the electrolyte evaporates and the internal pressure rises, thereby rupturing the battery cell soft pack.

[0008] In this case, a flame may occur in the battery module and the battery pack, and when the battery pack is mounted on a device such as a car, it may not only cause damage to items but also cause harm to people. Therefore, a method including additional parts for ensuring the safety of the inside of the battery pack is proposed to prevent further heat diffusion in the event of a fire, but due to the additional parts, this method has the problem of reducing the energy density of the battery and increasing the price. Therefore, it is necessary to design other types of battery packs.

[0009] Figure 1is a diagram schematically showing a state in which a conventional battery pack is mounted on a device. Figure 2 and Figure 3 It is shown Figure 1 Figure 2 is a diagram of a conventional battery pack installed on a device.

[0010] Reference Figure 1 When the conventional battery pack 1 is mounted on a device 5 such as a car, the battery pack 1 is located inside the front surface portion of the car and inside the rear surface portion of the car. Here, the front surface portion of the car refers to the normal travel direction of the car (which is the x-axis direction), and the rear surface portion of the car is in the direction opposite to the normal travel direction of the car (which is the -x-axis direction).

[0011] Reference Figure 2 and Figure 3 The battery pack 1 includes an upper battery pack housing 11 and a lower battery pack housing 12. The upper battery pack housing 11 is a housing that covers the battery modules installed inside the battery pack and may have a constant volume in the height direction (z-axis direction). The lower battery pack housing 12 may be a flat plate on which the battery modules are installed.

[0012] Since the conventional battery pack 1 has a constant volume in the height direction (z-axis direction) in this way, there is a problem that the battery pack 1 is heavy. In addition, when the battery pack 1 is mounted on a car, the battery pack 1 has a structural feature that makes it inevitable to be located at the front surface portion and the rear surface portion of the car. Therefore, in the event of a fire, there is a problem that it is difficult to directly inject water into the battery pack 1 from the outside and suppress the flame. Summary of the invention

[0013] Technical issues

[0014] An object of the present disclosure is to provide a battery pack and a device including the battery pack that facilitates fire extinguishing and ensures safety in the event of a fire.

[0015] However, the technical problems to be solved by the embodiments of the present disclosure are not limited to the above-mentioned problems, and various extensions can be made within the scope of the technical concept included in the present disclosure.

[0016] Technical Solution

[0017] According to one embodiment of the present disclosure, a battery pack is provided, comprising: a first battery pack housing, in which a plurality of battery modules accommodating battery cell stacks are installed; a second battery pack housing, which is configured to cover the battery modules; and an inflow port, which is arranged at an upper end of the second battery pack housing, wherein the inflow port is connected to a flow path for transmitting a fire extinguishing liquid injected from the outside.

[0018] The inflow port may be provided in one region of the second battery pack case corresponding to a first region and a second region, the first region and the second region being regions where the plurality of battery modules are high voltage (HV) connected.

[0019] The inflow port may be provided in a region of the second battery pack case vertically overlapping the first region and the second region.

[0020] The first region may be a region where the battery module is electrically HV connected to an external electrical device, and the second region may be a region where the battery module is electrically HV connected to other adjacent battery modules.

[0021] The inflow port may be a rupture disk or a valve that opens by external or internal pressure of the cell.

[0022] The inflow port may include a hole penetrating the second battery pack case and a cover portion covering the hole.

[0023] The cover part may be formed of a material that melts at a predetermined temperature.

[0024] The cover may be polypropylene (PP), polycarbonate (PC) or polyethylene terephthalate (PET).

[0025] A battery pack according to another embodiment further includes a heat insulating member disposed inside the battery pack case.

[0026] The insulation member includes a first insulation member and a second insulation member, and the first insulation member and the second insulation member are disposed between the battery module and the second battery pack case and may have a surface parallel to the second battery pack case.

[0027] The first heat insulation member may be disposed in a region other than the first region and the second region, and the second heat insulation member may be disposed in a region where the battery module is electrically connected to an adjacent battery module.

[0028] The heat insulation member includes a third heat insulation member, and the third heat insulation member may be disposed perpendicularly to the first battery pack case.

[0029] The third heat insulation member may be provided in a region where the battery module is electrically connected to an adjacent battery module.

[0030] The heat insulation member includes a fourth heat insulation member, and the fourth heat insulation member may be disposed between a plurality of battery cells constituting the battery cell stack.

[0031] The thermal insulation member may be one of silica, mica (MICA), and aerogel.

[0032] According to another embodiment of the present disclosure, there is provided a device, comprising: the battery pack described above; and a water inlet port connected to a flow path to inject a fire extinguishing liquid.

[0033] The area of ​​the water inlet port may increase as it extends from the flow path to the outer surface of the device.

[0034] The flow path may branch corresponding to the inflow port.

[0035] The flow path may further include a heat-resistant member provided to surround an outer surface of the flow path.

[0036] The heat-resistant member may be one of silicon, mica (MICA), and aerogel.

[0037] Beneficial Effects

[0038] According to an embodiment, a fire extinguishing liquid such as water may be injected into the battery pack to help extinguish the fire and ensure safety in the event of a fire.

[0039] In addition, since no additional parts are required to inject the fire extinguishing liquid, the weight of the battery does not increase and the energy density can also be improved.

[0040] Effects obtained from the present disclosure are not limited to the above-mentioned effects, and additional other effects not mentioned herein will be clearly understood by those skilled in the art from the specification and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a diagram schematically showing a state in which a conventional battery pack is mounted on a device.

[0042] Figure 2 and Figure 3 It is shown Figure 1 Figure 2 is a diagram of a conventional battery pack installed on a device.

[0043] Figure 4 is a diagram schematically illustrating a state in which a battery pack according to an embodiment of the present disclosure is mounted on a device.

[0044] Figure 5 is a perspective view of a battery pack according to an embodiment of the present disclosure.

[0045] Figure 6 yes Figure 5 Schematic exploded perspective view of a battery pack.

[0046] Figure 7 It is shown Figure 5 Figure 1 is a diagram of a battery pack receiving fire extinguishing liquid injected from the outside.

[0047] Figure 8 It is shown Figure 7A cross-sectional view of a portion of a flow path.

[0048] Fig. 9 It is a diagram showing that a heat insulating member is provided on a battery module.

[0049] Fig.10 It is shown Fig. 9 An exploded perspective view of a battery pack and thermal insulation components.

[0050] Fig.11 It shows that the setting Figure 6 FIG. 1 is a diagram of a thermal insulation member between battery modules mounted on a battery pack.

[0051] Fig.12 yes Fig.10 An exploded perspective view of a battery module and thermal insulation components.

[0052] Fig.13 It is a diagram showing a heat insulating member provided between battery cells constituting a battery module. DETAILED DESCRIPTION

[0053] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement these embodiments. The present disclosure can be modified in various different ways and is not limited to the embodiments set forth herein.

[0054] For the sake of clarity, descriptions of parts not related to the specification will be omitted, and the same reference numerals will be used throughout the specification to denote the same or similar elements.

[0055] In addition, in the drawings, for the convenience of description, the size and thickness of each element are arbitrarily shown, and the present disclosure is not necessarily limited to those sizes and thicknesses shown in the drawings. In the drawings, for the sake of clarity, the thickness of layers, regions, etc. is exaggerated. In the drawings, for the convenience of description, the thickness of parts and regions is exaggerated.

[0056] Furthermore, it will be understood that when an element such as a layer, film, region, or plate is referred to as being "on" or "over" another element, it may be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, no other intervening elements are present. Furthermore, a portion being "on" or "over" a reference portion means that the portion is above or below the reference portion, and does not specifically mean that the portion is "on" or "over" the reference portion in the opposite direction of gravity.

[0057] Furthermore, throughout the specification, when a part is referred to as “including” or “comprising” a certain component, it means that the part may also include other components, and other components are not excluded unless otherwise specified.

[0058] Furthermore, throughout the specification, when referred to as a “plane”, it means a state where the target portion is viewed from the upper side, and when referred to as a “section”, it means a state where the target portion is viewed from one side of a section cut vertically.

[0059] Figure 4 is a diagram schematically illustrating a state in which a battery pack according to an embodiment of the present disclosure is mounted on a device.

[0060] Reference Figure 4 , when the battery pack 1000 according to an embodiment of the present disclosure is mounted on a device such as a car 50, the battery pack 1000 may be disposed at a lower portion of the car 50. Specifically, the battery pack 1000 may be disposed below a middle portion of the car 50. The middle portion of the car 50 may refer to an inner region of the wheels with reference to the wheels at the front and rear surface portions of the car, and the lower portion of the car 50 may refer to a position lower than a seat disposed in the car with reference to the ground.

[0061] The car 50 may include a water inlet port 51 which is a hole formed on an outer surface of the car 50 , and a water inlet cap 53 covering the water inlet port 51 .

[0062] The water inlet port 51 may be a hole through which the fire extinguishing liquid flows from the outside into the battery pack 1000 via a flow path 60 to be described later.

[0063] The water inlet port 51 may be formed by more than one port. In the figure, the water inlet ports 51 are formed one by one near the front surface and the rear surface of the vehicle based on the middle portion, but the position and number of the water inlet ports 51 are not limited in the figure as long as the fire extinguishing liquid can flow into the battery pack 1000.

[0064] The area (cross-sectional area) of the water inlet port 51 may increase as it extends from the flow path 60 to the outer surface of the automobile 50. Thus, the area of ​​the water inlet port 51 exposed to the outside increases compared to the area of ​​the flow path 60, so that when the fire extinguishing liquid is injected from a long distance, the fire extinguishing liquid can effectively flow into the water inlet port 51. For example, the water inlet port 51 may have a truncated cone shape, but the present disclosure is not limited thereto, and various modifications and changes may be made, for example, a structure in which the fire extinguishing liquid can effectively flow into the water inlet port 51.

[0065] The water inlet port 51 may include a water inlet cover 53 covering the water inlet port 51. The water inlet cover 53 is generally used to prevent foreign matter such as water or dust from flowing into the water inlet port 51 from the outside.

[0066] Since the water inlet cover 53 is disposed at a position corresponding to the water inlet port 51 and covers the water inlet port 51, it may correspond to the position and number of the water inlet port 51. In addition, the water inlet cover 53 may correspond to the size of the water inlet port 51 or may be larger than the size of the water inlet port 51.

[0067] Figure 5 is a perspective view of a battery pack according to an embodiment of the present disclosure. Figure 6 yes Figure 5 Schematic exploded perspective view of a battery pack.

[0068] Reference Figure 5 and Figure 6 The battery pack 1000 according to the present embodiment includes a first battery pack housing 1100 on which a plurality of battery modules 100 are mounted and a second battery pack housing 1200 provided to cover the battery modules 100. Here, the first battery pack housing 1100 and the second battery pack housing 1200 may be fastened to each other using a fastening member or joined by a method such as welding, thereby sealing the interior of the battery pack 1000.

[0069] A plurality of battery modules 100 may be mounted to the first battery pack case 1100. The first battery pack case 1100 may include a side plate 1110 which protrudes in a height direction (z-axis direction) of the battery module 100 and extends along an edge of the first battery pack case 1100.

[0070] The side plate 1110 may be a plate covering both sides of the plurality of battery modules 100. As shown in the figure, the side plate 1110 may be provided along all edges of the first battery pack housing 1100, or may be provided only partially in one edge region of the first battery pack housing 1100. The edge of the side plate 1110 corresponds to one edge of the first battery pack housing 1100 and one edge of the second battery pack housing 1200, and may be fastened using a fastening member or joined by a method such as welding.

[0071] The second battery pack case 1200 may be a case covering the plurality of battery modules 100. In one example, the second battery pack case 1200 may have a flat plate shape. The second battery pack case 1200 may have a size corresponding to that of the first battery pack case 1100.

[0072] The inflow port 2000 may be located in one area of ​​the second battery pack case 1200 .

[0073] The inflow port 2000 is a passage through which the fire extinguishing liquid injected from the water inlet port 51 flows into the battery pack 1000 along a flow path in case of fire, and may be located on the second battery pack case 1200 .

[0074] The inflow port 2000 may be formed by at least one port. Figure 5 As shown, the number of inflow ports can be 4, or Figure 6 As shown, the number of inflow ports may be 12. The number of inflow ports 2000 is not limited to those shown in the figure and may vary.

[0075] The inflow port 2000 may be located in an area of ​​the second battery pack housing 1200 corresponding to the first area A1 and the second area A2 inside the battery pack 1000. The inflow port 2000 may be located in an area of ​​the second battery pack housing 1200 overlapping the first area A1 and the second area A2, specifically, the inflow port 2000 may be located in an area of ​​the second battery pack housing 1200 vertically overlapping the first area A1 and the second area A2.

[0076] The first area A1 and the second area A2 are areas where the battery module 100 is electrically HV connected. Specifically, the first area A1 is an area where the battery module 100 is electrically HV connected to an external electrical device such as a battery disconnect unit (BDU) through a terminal bus bar, and the second area A2 is an area where the relative battery modules 100 are electrically HV connected to each other through a module connector or the like. That is, the first area A1 and the second area A2 are areas where high voltage flows, and may be areas with relatively higher temperatures compared to other areas in the battery pack 1000, and therefore have a higher possibility of fire.

[0077] Therefore, the inflow port 2000 is located in one area of ​​the second battery pack case 1200 corresponding to the first area A1 and the second area A2, whereby when a fire occurs, the fire extinguishing liquid is applied around the corresponding area, thereby facilitating fire extinguishing.

[0078] The inflow port 2000 may be formed in various shapes. In one example, the inflow port 2000 may be opened by a predetermined pressure within the battery pack 1000 or by a pressure caused by a flowing fire extinguishing liquid from outside the battery pack 1000. Preferably, the inflow port 2000 may be a rupture disk or a valve.

[0079] In another example, the inflow port 2000 may include a hole penetrating the second battery pack housing 1200 and a cover covering the hole. In this case, the cover may be made of a material that melts at a predetermined temperature and may be formed of a material that can melt in the event of a fire. Specifically, the material forming the cover may be a plastic material. In one example, the cover may be made of polypropylene (PP), polycarbonate (PC), or polyethylene terephthalate (PET).

[0080] According to the above illustrative example, the inflow port 2000 is usually not opened, thereby separating the interior of the battery pack 1000 from the external environment. Therefore, under normal circumstances, the performance of the battery can be maintained by preventing foreign matter such as dust and moisture from flowing into the battery pack 1000 from the outside. However, if the battery pack catches fire and reaches a predetermined temperature or pressure or more, the inflow port 2000 is opened and the fire extinguishing liquid injected from the water inlet port 51 flows into the battery pack 1000 to suppress the fire, thereby facilitating fire extinguishing and ensuring safety in the event of a fire.

[0081] In addition, the battery pack 1000 including the above configuration according to the present embodiment corresponds to a model applied only to an electric vehicle, Figure 2 and Figure 3 The configuration is different from a conventional battery pack of an automobile 5 including a conventional internal combustion engine. Therefore, unlike a conventional battery pack, the battery pack 1000 according to the present embodiment is different in the installation position of the battery module 100, the HV connection structure, the height and shape of the battery pack 1000, etc. That is, because the position of the inflow port 2000 for receiving the fire extinguishing liquid flowing in from the outside is located in an area of ​​the battery pack case corresponding to the area to which the battery module 100HV is connected, the battery pack 1000 according to the present embodiment can suppress the flame more directly and effectively than the conventional battery pack.

[0082] Figure 7 It is shown Figure 5 Figure 1 is a diagram of a battery pack receiving fire extinguishing liquid injected from the outside. Figure 8 It is shown Figure 7 A cross-sectional view of a portion of a flow path.

[0083] Reference Figure 7 and Figure 8 , the flow path 60 connected to the water inlet port 51 is connected to the inlet port 2000 , and the fire extinguishing liquid injected from the water inlet port 51 may move along the flow path 60 and be injected into the inside of the battery pack 1000 via the inlet port 2000 .

[0084] The flow path 60 may be a pipe, and the heat-resistant member 65 may be provided on the outer surface of the flow path 60. Specifically, the heat-resistant member 65 may be provided to surround the outer surface of the flow path 60. In addition, the heat-resistant member 65 may be provided to surround not only the flow path 60 connected to the water inlet port 51 but also the outer surface of the branched flow path 60.

[0085] Since the heat-resistant member 65 prevents the pipe constituting the flow path 60 from being damaged or melted in the event of a fire, the fire extinguishing liquid can be prevented from flowing into the battery pack 1000 due to damage to the flow path 60. The heat-resistant member 65 can be formed of a material that does not melt at high temperatures and is heat-resistant. In one example, the heat-resistant member 65 can be silicon, mica (MICA), aerogel, etc.

[0086] That is, the flow path 60 may transfer the fire extinguishing liquid injected from the water inlet port 51 to the inflow port 2000 while being connected to the water inlet port 51. In this case, a plurality of branched flow paths 60 may correspond to the inflow ports 2000, respectively.

[0087] The flow path 60 may be branched into various shapes. The flow path 60 may be in the form of a manifold. In this figure, a plurality of flow paths 60 branched from two water inlet ports 51 are shown as being respectively located at the same number of inflow ports 2000, but differently from this, the flow path 60 may be branched and connected to the inflow ports 2000, which is an exemplary configuration.

[0088] The flow path 60 may be in a state of being in contact with the inflow port 2000, or may be in a state of being inserted into the inflow port 2000. In this case, the size of the inflow port 2000 may correspond to the size of the flow path 60 in contact with or inserted into the inflow port 2000. Alternatively, the size of the inflow port 2000 may be larger than the size of the flow path 60 due to ease of assembly between the flow path 60 and the inflow port 2000 or for reasons of manufacturing process.

[0089] In other words, since the flow path 60 connected to the water inlet port 51 branches corresponding to the inflow port 2000, even with a small number of water inlet ports 51, the fire extinguishing liquid can be applied to a large number of inflow ports 2000, making fire extinguishing faster and easier, and ensuring fire extinguishing efficiency and safety.

[0090] Fig. 9 It is a diagram showing that a heat insulating member is provided on a battery module. Fig.10 It is shown Fig. 9 An exploded perspective view of the battery pack and thermal insulation components. Fig. 9 and Fig.10 , the heat insulation member 3000 is disposed inside the battery pack 1000 , and when a flame occurs, the time for the flame to be exposed from the battery pack 1000 to the outside can be delayed.

[0091] The insulation member 3000 may be disposed on the battery module 100. Specifically, the insulation member 3000 may be disposed between the battery module 100 and a second battery pack case (not shown).

[0092] The heat insulating member 3000 may be a material having heat insulating properties and heat resistance. In one example, the heat insulating member 3000 may be silicon, mica (MICA), aerogel, or the like.

[0093] The heat insulation member 3000 includes a first heat insulation member 3100 and / or a second heat insulation member 3200. The first heat insulation member 3100 and the second heat insulation member 3200 may be disposed to have a face parallel to the second battery pack case.

[0094] The first heat insulation member 3100 may be provided on the battery module 100. Specifically, the first heat insulation member 3100 may be provided on one surface of the battery module 100 in the height direction (z-axis direction). Therefore, when a flame appears in the battery module, the time required for the flame to be exposed to the outside through the second battery pack housing 1200 of the battery pack 1000 can be delayed. In addition, by preventing the heat generated in the battery module 100 from being directly transferred to the second battery pack housing 1200, the time for the flame to be generated can be delayed, and damage to personnel / objects can be minimized.

[0095] The first heat insulation member 3100 may correspond to the area of ​​the battery module 100 , or may have an area greater than the area of ​​the battery module 100 .

[0096] First, the area of ​​the first insulation member 3100 may correspond to the area of ​​the battery module 100. Specifically, the area of ​​the first insulation member 3100 may correspond to the area of ​​one surface of the battery module 100 in the height direction (z-axis direction). In this case, the number of the first insulation members 3100 may correspond to the number of the battery modules 100.

[0097] Alternatively, the area of ​​the first insulation member 3100 may be greater than the area of ​​one surface of the battery module 100 in the height direction (z-axis direction). In this case, the first insulation member 3100 may be configured to cover more than one battery module 100, and the number of the first insulation members 3100 may be less than the number of battery modules 100. However, even in this case, the first insulation member 3100 may not be configured to cover the first area A1 and the second area A2 inside the battery pack. That is, the first insulation member 3100 is configured to cover only the battery module 100, and is not configured to cover the first area A1 and the second area A2, so that the fire extinguishing liquid applied from the inflow port 2000 located in an area of ​​the second battery pack housing 1200 corresponding to the first area A1 and the second area A2 can flow into the battery module 100 and the battery cell more effectively.

[0098] The second insulation member 3200 may be disposed in a region corresponding to a region electrically connected to the adjacent battery module 100. For example, the second insulation member 3200 may also be disposed in a region corresponding to a region electrically connected to the adjacent battery module 100. Figure 6 In this case, the area of ​​the second insulation member 3200 may correspond to the area of ​​the second area A2. The second insulation member 3200 may be provided to cover the second area A2.

[0099] Since the second heat insulating member 3200 is provided, the heat generated in the second area A2 is prevented from being transferred to the second battery pack housing 1200 or other components of the battery pack, thereby suppressing the generation of flames. In addition, if a flame occurs between the battery modules 100, the high temperature heat and the flame are not directly transferred to the second battery pack housing 1200 of the battery pack 1000, thereby delaying the time for the flame to be exposed to the outside and ensuring safety.

[0100] However, even if the second insulation member 3200 is disposed to cover the second area A2, the first area A1 to which the battery module 100 is electrically connected is still open. Therefore, the fire extinguishing liquid applied to the battery pack 1000 via the inflow port 2000 can directly and effectively flow into the battery module 100 and the battery cells.

[0101] In the drawing, the first insulation member 3100 and the second insulation member 3200 are shown as being disposed together inside the battery pack 1000, but not limited thereto, the first insulation member 3100 or the second insulation member 3200 may be disposed alone or in combination thereof.

[0102] Fig.11 It shows that the setting Figure 6 FIG. 1 is a diagram of a thermal insulation member between battery modules mounted on a battery pack. Fig.12 yes Fig.10 An exploded perspective view of a battery module and thermal insulation components.

[0103] Fig.11 and Fig.12 The contents described in are modifications of the embodiments of the present disclosure described above, and detailed descriptions of configurations similar to the above configurations will be omitted.

[0104] Reference Fig.11 and Fig.12 , the heat insulation member 3000 includes a third heat insulation member 3300 , and the third heat insulation member 3300 may be disposed vertically to the first battery pack case 1100 .

[0105] The third insulation member 3300 may be disposed between the battery modules 100. Specifically, the third insulation member 3300 may be disposed in a region where adjacent battery modules 100 are electrically connected to each other.

[0106] In one example, the third thermal insulation member 3300 may be disposed at a position adjacent to Figure 6 The third heat insulating member 3300 may be located in an area corresponding to the second area A2. Figure 6 The second area A2 is disposed between adjacent battery modules 100 .

[0107] Specifically, one surface of the third insulation member 3300 is disposed to face the front surface of one of the adjacent battery modules 100, and the other surface of the third insulation member 3300 may be disposed to face the rear surfaces of the remaining battery modules 100 in the adjacent battery modules 100. The front and rear surfaces of the battery module 100 are surfaces of the battery module 100 that can be electrically connected to an adjacent battery module 100 or other electrical devices, which are represented as the y-axis direction and the -y-axis direction in the figure.

[0108] The shape of the third insulation member 3300 may correspond to the shape of the front surface or rear surface of the battery module 100. For example, the width (x-axis direction) of the third insulation member 3300 may correspond to the width (x-axis direction) of the battery module 100, and the height (z-axis direction) of the third insulation member 3300 may correspond to the height (z-axis direction) of the battery module 100. That is, the third insulation member 3300 may correspond to the size of the front surface or rear surface of the battery module 100. However, the shape of the third insulation member 3300 is not limited thereto. In one example, although not shown in the figure, the shape of the third insulation member 3300 may be larger or smaller than the shape of the front surface or rear surface of the battery module 100. When the shape of the third insulation member 3300 is larger than the shape of the front surface or rear surface of the battery module 100, the third insulation member 3300 may be provided to cover the front surface or rear surface of more than one battery module 100.

[0109] In the area where the battery modules 100 are electrically connected to each other, the third heat insulating member 3300 is disposed between adjacent battery modules 100, thereby preventing heat transfer caused by high voltage from becoming easy and suppressing the occurrence of fire as much as possible. In addition, even if a flame occurs in one battery module 100, the flame can be suppressed from moving to an adjacent battery module as much as possible, thereby preventing a thermal runaway phenomenon.

[0110] Fig.13 It is a diagram showing a heat insulating member provided between battery cells constituting a battery module.

[0111] Reference Fig.13A battery module 100 according to an embodiment of the present disclosure may include a battery cell stack 120 in which a plurality of battery cells 110 are stacked in one direction, a heat insulating member 3000 disposed between the battery cells 110 constituting the battery cell stack 120, module frames 210 and 220 accommodating the battery cell stack 120, a bus bar structure 300 disposed on the front surface and / or the rear surface of the battery cell stack 120, and an end plate 400 covering the front surface and / or the rear surface of the battery cell stack 120.

[0112] Here, since the type of the battery cell 110 is not particularly limited, it may be a pouch type secondary battery or a prismatic secondary battery, but preferably, may be a pouch type secondary battery.

[0113] The battery cell 110 may be composed of a plurality of battery cells, and the plurality of battery cells 110 are stacked to be electrically connected to each other, thereby forming a battery cell stack 120. As shown in the drawing, the plurality of battery cells 110 may be stacked in a direction parallel to the x-axis.

[0114] The module frames 210 and 220 may include a first frame 210 and a second frame 220, and the battery cell stack 120 may be installed between the first frame 210 and the second frame 220 to configure the battery module 100. However, the module frames 210 and 220 are not limited to the above, and may be a single frame in a metal plate shape in which the upper and lower surfaces and both side surfaces are integrated.

[0115] The bus bar structure 300 includes a bus bar frame and a bus bar mounted on one surface of the bus bar frame. The bus bar may be mounted on one surface of the bus bar frame and may be used to electrically connect the battery cell stack 120 or the battery cell 110 to an external device circuit.

[0116] The end plate 400 may protect the battery cell stack 120 and the electrical equipment connected thereto from external physical impact by sealing the open surface of the module frame 200. To this end, the end plate 400 may be made of a material having a predetermined strength. For example, the end plate 400 may include a metal such as aluminum.

[0117] The heat insulation member 3000 may be disposed between the battery cells 110 constituting the battery cell stack 120 , and the heat insulation member 3000 is a fourth heat insulation member 3400 .

[0118] At least one fourth heat insulation member 3400 may be disposed between the battery cell stacks 120 .

[0119] The size of the fourth thermal insulation member 3400 may correspond to the size of the battery cell 110. Specifically, the fourth thermal insulation member 3400 may correspond to the size of one surface of the battery cell facing the fourth thermal insulation member 3400. For example, the length (y-axis direction) of the fourth thermal insulation member 3400 may correspond to the length (x-axis direction) of the battery cell 110, and the height (z-axis direction) of the fourth thermal insulation member 3400 may correspond to the height (z-axis direction) of the battery cell 110. However, the shape of the fourth thermal insulation member 3400 may be larger or smaller than the size of the battery cell 100, although the shape is not limited thereto and is not shown in the figure.

[0120] The fourth thermal insulation member 3400 is disposed between the battery cells 110 constituting the battery cell stack 120 so that the heat generated from the battery cell 110 due to the charging and discharging of the battery is not easily transferred to the adjacent battery cell 110. This is because, when a large amount of high-temperature heat is generated from the battery cell 110, the electrolyte evaporates and the internal pressure of the battery cell 110 rises, thereby rupturing the battery cell soft pack, which may cause a fire or explosion. Therefore, the fourth thermal insulation member 3400 does not contribute to heat transfer between the battery cells 110, thereby minimizing the occurrence of a fire. In addition, even if the battery cell 110 expands due to the charging and discharging of the battery, the degree of expansion can be suppressed because the fourth thermal insulation member 3400 is provided.

[0121] Figures 9 to 13 The heat insulation member 3000 described in may be provided in the battery module and the battery pack alone or in various combinations.

[0122] The battery module and the battery pack including the battery module can be applied to various devices. Such a device can be applied to a vehicle device such as an electric bicycle, an electric vehicle or a hybrid electric vehicle, but the present disclosure is not limited thereto and can also be applied to various devices capable of using the battery module and the battery pack including the battery module, which falls within the scope of the present disclosure.

[0123] The present disclosure has been described in detail above with reference to the preferred embodiments of the present disclosure. However, it will be appreciated by those skilled in the art that the scope of the present disclosure is not limited thereto, and that various modifications and improvements may be made to these embodiments without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is defined in the appended claims and their equivalents.

[0124] 50: Cars

[0125] 51: Water inlet port

[0126] 60: Flow path

[0127] 65: Heat-resistant components

[0128] 100: Battery module

[0129] 1000: Battery Pack

[0130] 1100: First battery pack housing

[0131] 1200: Second battery pack housing

[0132] 2000: Inbound port

[0133] 3000: Thermal insulation components

Claims

1. A battery pack comprising: a first battery pack housing, wherein a plurality of battery modules accommodating a battery cell stack are mounted in the first battery pack housing; a second battery pack housing configured to cover the battery module; as well as an inflow port, the inflow port being disposed at an upper end of the second battery pack housing, The inflow port is connected to a flow path for transmitting fire extinguishing liquid injected from the outside.

2. The battery pack according to claim 1, wherein: The inflow port is disposed in an area of ​​the second battery pack case corresponding to a first area and a second area, which are areas where the plurality of battery modules are high voltage connected, ie, HV connected.

3. The battery pack according to claim 2, wherein: The inflow port is provided in a region of the second battery pack case vertically overlapping the first region and the second region.

4. The battery pack according to claim 2, wherein: The first area is an area where the battery module is electrically connected to an external electrical device, and The second region is a region where the battery module is electrically HV connected to another adjacent battery module.

5. The battery pack according to claim 1, wherein: The inflow port is a rupture disk or valve that opens by external or internal pressure of the cell.

6. The battery pack according to claim 1, wherein: The inflow port includes a hole penetrating through the second battery pack case and a cover portion covering the hole.

7. The battery pack according to claim 6, wherein: The cover portion is formed of a material that melts at a predetermined temperature.

8. The battery pack according to claim 7, wherein: The cover is made of polypropylene (PP), polycarbonate (PC) or polyethylene terephthalate (PET). 9 . The battery pack according to claim 1 , further comprising a heat insulating member disposed inside the battery pack case.

10. The battery pack according to claim 9, wherein: The thermal insulation member includes a first thermal insulation member and a second thermal insulation member, and The first heat insulating member and the second heat insulating member are disposed between the battery module and the second battery pack case, and have surfaces parallel to the second battery pack case.

11. The battery pack according to claim 10, wherein: The first heat insulating member is provided in a region other than the first region and the second region, and The second heat insulating member is disposed in a region where the battery module is electrically connected to an adjacent battery module.

12. The battery pack according to claim 9, wherein: The thermal insulation member includes a third thermal insulation member, and The third heat insulating member is disposed perpendicularly to the first battery pack case.

13. The battery pack according to claim 12, wherein: The third heat insulating member is disposed in a region where the battery module is electrically connected to an adjacent battery module.

14. The battery pack according to claim 9, wherein: The thermal insulation member includes a fourth thermal insulation member, and The fourth heat insulating member is provided between a plurality of battery cells constituting the battery cell stack.

15. The battery pack according to claim 9, wherein: The thermal insulation member is one of silicon, mica (MICA) and aerogel.

16. An apparatus comprising: The battery pack according to claim 1; as well as A water inlet port is connected to the flow path to inject fire extinguishing liquid.

17. The device according to claim 16, wherein: The area of ​​the water inlet port increases as the water inlet port extends from the flow path to the outer surface of the device.

18. The apparatus of claim 16, wherein: The flow path branches corresponding to the inflow port.

19. The apparatus of claim 16, wherein: The flow path further includes a heat-resistant member disposed to surround an outer surface of the flow path.

20. The apparatus of claim 19, wherein: The heat-resistant member is one of silicon, mica (MICA) and aerogel.

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