Venting device for battery and battery pack including same

Abstract

A battery pack according to one embodiment of the present invention comprises: one or more battery modules; a housing for accommodating the battery modules; and a venting device for discharging gas to the outside of the housing, wherein the venting device includes: an exhaust plate including one or more exhaust ports; and a vortex forming pillar disposed inwardly to be spaced apart from the exhaust plate. The venting device for a battery, and the battery pack, according to one embodiment of the present invention, have the effect of smoothly venting, to the outside of the pack, gas generated inside the pack by reducing the amount of particles that interfere when gas is vented to the outside of the battery pack.

Description

Venting device for battery and battery pack including same

[0001] The present invention relates to a venting device for a battery and a battery pack, and more particularly, to a venting device for a battery and a battery pack having a vortex generating structure to reduce the amount of particles flowing into the venting device.

[0002] Secondary batteries, unlike primary batteries that cannot be recharged, are batteries that can be charged and discharged. They are used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) that are driven by electrical power sources.

[0003] Currently, widely used types of secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of these unit secondary battery cells, i.e., unit battery cells, is approximately 2.5 V to 4.6 V. Therefore, when a higher output voltage is required, multiple battery cells are connected in series to form a battery pack. Furthermore, depending on the charge / discharge capacity required for the battery pack, multiple battery cells are connected in parallel to form a battery pack. Therefore, the number of battery cells included in the battery pack can be set in various ways depending on the required output voltage or charge / discharge capacity.

[0004] When configuring a battery pack by connecting multiple battery cells in series or parallel, it is common to first configure a battery module comprising at least one battery cell, preferably multiple battery cells, and then use at least one such battery module and add other components to configure the battery pack. Here, a battery module refers to a component in which multiple battery cells are connected in series or parallel, and a battery pack refers to a component in which multiple battery modules are connected in series or parallel to increase capacity and output, etc.

[0005] Typically, a battery pack has a structure in which multiple battery modules are accommodated within a pack housing, and in order to maintain structural stability, multiple battery modules or battery module assemblies can generally be arranged on the same plane.

[0006] In these battery packs, venting gas leaking from the cells to the outside of the pack is crucial to preventing and delaying thermal propagation (TP). Gas venting occurs through venting valves at the front and rear of the pack, but these valves can become clogged by particles, hindering proper venting.

[0007] The present invention aims to provide a venting device for a battery and a battery pack including the same, which reduces the amount of particles that interfere with gas venting to the outside of a battery pack, thereby allowing gas leaking from cells inside the pack to be smoothly vented to the outside of the pack.

[0008] A venting device for a battery according to one embodiment of the present invention comprises: an exhaust plate including one or more exhaust ports; and a vortex-forming pillar disposed spaced apart from the exhaust plate and configured to form a vortex.

[0009] Additionally, the venting device for the battery further includes a mesh covering the exhaust port.

[0010] Additionally, the mesh is arranged on the outer surface of the exhaust plate.

[0011] In addition, the exhaust plate further includes an inclined plate that is arranged in a downward direction in front of the exhaust port.

[0012] Additionally, the inclined plates are respectively arranged in the plurality of exhaust ports.

[0013] Additionally, a plurality of the vortex forming columns are arranged parallel to the exhaust plate.

[0014] Additionally, the top of the vortex forming column is positioned higher than the bottom of the inclined plate.

[0015] Additionally, the cross-section of the vortex forming column may be circular.

[0016] Additionally, the venting device for the battery further includes a connecting plate extending from the lower portion of the exhaust plate to the vortex forming column.

[0017] Additionally, the vortex forming pillars are respectively arranged on a plurality of the connecting plates.

[0018] A battery pack according to one embodiment of the present invention comprises: one or more battery modules; a housing for accommodating the battery modules; and a venting device for discharging gas to the outside of the housing; wherein the venting device comprises an exhaust plate including one or more exhaust ports; and a vortex-forming column disposed inwardly spaced from the exhaust plate.

[0019] A venting device for a battery and a battery pack according to one embodiment of the present invention have the effect of reducing the amount of particles that interfere with gas venting to the outside of the battery pack, thereby allowing gas leaking from cells inside the pack to be smoothly vented to the outside of the pack.

[0020] FIG. 1 is a drawing illustrating a battery pack according to one embodiment of the present invention.

[0021] Figure 2 is a perspective view of a battery module in one embodiment of the present invention.

[0022] Figure 3 is an exploded perspective view of a battery module in one embodiment of the present invention.

[0023] Figure 4 is a perspective view of a battery cell in one embodiment of the present invention.

[0024] Figure 5 is a detailed view of a portion of the battery pack in Figure 1;

[0025] Figure 6 is a drawing of a part of the battery pack in Figure 5 viewed from a different angle.

[0026] Figure 7 is a side view of a venting device for a battery in one embodiment of the present invention.

[0027] Figure 8 is a front view of a venting device for a battery in one embodiment of the present invention.

[0028] Figure 9 is a plan view of a venting device for a battery in one embodiment of the present invention.

[0029] FIG. 10 is a drawing showing the results of a flow analysis of a vortex generating structure of a venting device for a battery in one embodiment of the present invention.

[0030] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid ambiguity in the interpretation of the present invention. Like reference numerals refer to like elements throughout the specification.

[0031] In order to clearly represent multiple layers and regions in the drawings, thicknesses may be enlarged. Similar parts are designated by the same drawing reference numerals throughout the specification. When an element such as a layer, film, region, or plate is said to be "over" another element, this includes not only the case where it is "directly over" that element, but also the case where there are other elements in between. Conversely, when an element is said to be "directly over" another element, it can mean that there are no other elements in between. Furthermore, when an element such as a layer, film, region, or plate is said to be "under" another element, this includes not only the case where it is "directly under" that element, but also the case where there are other elements in between. Conversely, when an element is said to be "directly under" another element, it can mean that there are no other elements in between.

[0032] A battery pack (2000) according to the present invention will be described in detail with reference to the drawings.

[0033] FIG. 1 is a drawing showing a battery pack according to an embodiment of the present invention, FIG. 2 is a perspective view of a battery module in an embodiment of the present invention, FIG. 3 is an exploded perspective view of a battery module in an embodiment of the present invention, FIG. 4 is a perspective view of a battery cell in an embodiment of the present invention, FIG. 5 is a detailed view of a portion of the battery pack in FIG. 1, FIG. 6 is a view of a portion of the battery pack in FIG. 5 viewed from another angle, FIG. 7 is a side view of a venting device for a battery in an embodiment of the present invention, FIG. 8 is a front view of a venting device for a battery in an embodiment of the present invention, FIG. 9 is a plan view of a venting device for a battery in an embodiment of the present invention, and FIG. 10 is a drawing showing the results of a flow analysis of a vortex generating structure of a venting device for a battery in an embodiment of the present invention.

[0034] A battery pack (2000) according to one embodiment of the present invention may include one or more battery modules (1000) and a housing (2100) that accommodates the battery modules (1000).

[0035] The above housing (2100) can accommodate a plurality of battery modules (1000) and can include a bottom portion (2110), a side portion (2120), and a top cover (not shown) as in FIG. 1.

[0036] The bottom portion (2110) of the housing (2100) may extend horizontally to form the bottom of the housing (2100), and in the present embodiment, the bottom portion (2110) may have a hollow structure.

[0037] As illustrated, the bottom portion (2110) may include a base plate, and the base plate may be formed in the form of a plate extending horizontally, and may be formed of a metal material, for example, but is not limited thereto.

[0038] The side portion (2120) of the housing (2100) forms the side of the housing (2100), and may include a left side portion (2123) forming the left side of the housing (2100), and a right side portion (2124) forming the right side of the housing (2100), and may further include a front portion (2121) forming the front of the housing (2100) in the X-axis direction, and a rear portion (2122) forming the rear of the housing (2100).

[0039] Accordingly, the left side portion (2123) and the right side portion (2124) of the side portion (2120) can be positioned at the left and right edges of the bottom portion (2110), respectively, and the front portion (2121) and the rear portion (2122) can be positioned at the front and rear edges of the bottom portion (2110), respectively.

[0040] In this embodiment, the housing (2100) is depicted as having a square box shape as shown, but is not limited thereto and may be configured in various shapes, including polygons.

[0041] And, although not shown, a top cover may be placed on the upper part of the housing (2100). The top cover may be formed in the form of a plate that is placed on the upper part of the housing (2100) and extends horizontally, and may cover the internal space of the housing (2100) formed by the bottom part (2110) and the side part (2120). The top cover may be connected to the upper part of the side part (2120), and specifically, the edge of the top cover may be connected to the upper parts of the left side part (2123), the right side part (2124), the front part (2121), and the rear part (2122) that form the side part (2120) by bolts, welding, or the like.

[0042] Additionally, a bulkhead may be placed between adjacent battery modules (1000) on the bottom (2110).

[0043] The above battery module (1000) may include a battery cell stack (100) in which a plurality of battery cells (110) are stacked along one direction, as illustrated in FIGS. 2 to 4, a module case (200) that accommodates the battery cell stack (100), a bus bar frame (300) positioned on the front and / or rear surface of the battery cell stack (100), an end plate (400) covering the front and / or rear surface of the battery cell stack (100), and a bus bar (310, 320) mounted on the bus bar frame (300).

[0044] The above battery cell stack (100) may be formed by stacking a plurality of battery cells (110) along one direction, and the plurality of battery cells (110) may be electrically connected. The direction in which the plurality of battery cells (110) are stacked may be the X-axis direction (or -X-axis direction) in FIG. 5.

[0045] The direction from the front to the rear of the battery cell stack (100), or the opposite direction, may be defined as the longitudinal direction of the battery cell stack (100), and may be the Y-axis direction in the drawing. In addition, the direction from the upper surface to the lower surface of the battery cell stack (100), or the opposite direction, may be defined as the width direction of the battery cell stack (100), and may be the Z-axis direction in the drawing.

[0046] The longitudinal direction of the battery cell stack (100) may be substantially the same as the longitudinal direction of the battery cell (110). The electrode leads (111, 112) of the battery cell (110) may be positioned on the front and rear sides of the battery cell stack (100), and the bus bars (310, 320) of the battery module (1000) may be positioned close to the front and rear sides of the battery cell stack (100) to easily form an electrical connection with the electrode leads (111, 112).

[0047] The battery cell (110) may be provided as a pouch-shaped battery cell, and the number of pouch-shaped battery cells stacked per unit area may be maximized. However, the battery cell (110) does not necessarily have to be provided as a pouch-shaped battery cell, and may be provided in a square, cylindrical, or other various shapes.

[0048] A battery cell (110) provided in a pouch type may include an electrode assembly and a cell case (115) that accommodates the electrode assembly (see FIG. 4).

[0049] The cell case (115) of the battery cell (110) may be a pouch-type cell case (115) for accommodating the electrode assembly. The cell case (115) includes a lower case and an upper case covering the lower case, and the upper and lower cases may be formed as a single piece. In addition, as illustrated in FIG. 4, the connecting portions of the upper and lower cases may be formed in a structure in which they are bent and folded. In addition, as illustrated, the upper case may completely cover the lower case, and a sealing portion (114) may be formed at the periphery.

[0050] Both the upper and lower cases can be formed of a laminate structure including an inner covering layer, a metal layer, and an outer covering layer. The inner covering layer is located on the inside of the cell case (115) based on the metal layer and is in direct contact with the electrode assembly, so it must have insulation and electrolytic resistance. In addition, in order to seal it from the outside, the sealing portion where the inner layers are thermally bonded must have excellent thermal bonding strength. The metal layer is located between the inner covering layer and the outer covering layer and serves as a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside. A preferable material for the metal layer in contact with the inner covering layer is an aluminum (Al) thin film that is lightweight and has excellent formability. The outer covering layer is located on the outside of the cell case (115) based on the metal layer, and this outer covering layer can use a heat-resistant polymer with excellent tensile strength, moisture permeability, and air permeability to protect the electrode assembly while ensuring heat resistance and chemical resistance. For example, nylon or polyethylene terephthalate can be used.

[0051] A receiving groove (116) can be formed in each of the upper and lower cases, and an electrode assembly can be accommodated in the receiving groove (116) of the upper and lower cases.

[0052] The electrode assembly housed in the cell case (115) may be one of a group consisting of a jelly-roll type electrode assembly having a structure in which a separator is interposed between long sheet-shaped positive and negative electrodes and then rolled up, a stack type electrode assembly having unit cells having a structure in which rectangular positive and negative electrodes are stacked with a separator interposed between them, a stack-folding type electrode assembly in which the unit cells are rolled up by a long separator film, and a lamination-stack type electrode assembly in which the unit cells are stacked with a separator interposed between them and attached to each other.

[0053] Additionally, the electrode assembly may include two electrode tabs and two electrode leads (111, 112) each connected to the electrode tabs by a weld.

[0054] One of the two electrode leads (111, 112) may be a positive lead connected to the positive tab, and the other electrode lead (111, 112) may be a negative lead connected to the negative tab.

[0055] A lead film (113) may be attached to each of the electrode leads (111, 112). The lead film (113) coupled to the electrode leads (111, 112) is positioned between the electrode leads (111, 112) and the cell case (115), thereby preventing a short circuit from occurring between the electrode leads (111, 112) and the cell case (115) and improving the sealing force, thereby preventing leakage of the electrolyte, etc.

[0056] The two electrode leads (111, 112) are shown as being arranged on each side of the electrode assembly, but may be arranged on only one side of the electrode assembly depending on the arrangement of the electrode tabs.

[0057] The above module case (200) may be for protecting the battery cell stack (100) and electrical components connected thereto from external physical impact, and the module case (200) may accommodate the battery cell stack (100) and electrical components connected thereto in the internal space of the module case (200).

[0058] The structure of the module case (200) may vary, and for example, the structure of the module case (200) may be a mono-frame structure. Here, the mono-frame may be in the form of a metal plate having an upper surface, a lower surface, and both side surfaces that are integrated. The mono-frame may be manufactured by extrusion molding. As another example, the structure of the module case (200) may be a structure in which a U-shaped frame and an upper plate (upper surface (201)) are combined. In the case of a structure in which a U-shaped frame and an upper plate are combined, the structure of the module case (200) may be formed by combining an upper plate on the upper side of a U-shaped frame, which is a metal plate having a lower surface and both side surfaces that are combined or integrated, and each frame or plate may be manufactured by press molding. In addition, the structure of the module case (200) may be provided as an L-shaped frame structure in addition to a mono-frame or a U-shaped frame, and may be provided as various structures not described in the above-described examples.

[0059] The structure of the module case (200) may be provided in an open form along the longitudinal direction of the battery cell stack (100). The front and rear sides of the battery cell stack (100) may not be covered by the module case (200). The electrode leads (111, 112) of the battery cells (110) may not be covered by the module case (200). The front and rear sides of the battery cell stack (100) may be covered by a bus bar frame (300), an end plate (400), or bus bars (310, 320) to be described later, and through this, the front and rear sides of the battery cell stack (100) may be protected from external physical impacts, etc.

[0060] A compression pad (150) may be positioned between one side of the inner surface of the battery cell stack (100) and the module case (200).

[0061] The compression pad (150) can be arranged to face the battery cell (110) at the outermost end of the battery cell stack (100) in the y-axis direction in the drawing.

[0062] Also, although not shown, a thermally conductive resin may be injected between the inner surface of the battery cell stack (100) and the module case (200), and a thermally conductive resin layer (not shown) may be formed between one side of the inner surface of the battery cell stack (100) and the module case (200) by the injected thermally conductive resin. At this time, the thermally conductive resin layer may be positioned on the Z-axis of the battery cell stack (100), and the thermally conductive resin layer may be formed between the battery cell stack (100) and the bottom surface positioned on the -Z-axis of the module case (200).

[0063] The above busbar frame (300) is positioned on one side of the battery cell stack (100), and can cover one side of the battery cell stack (100) and simultaneously guide the connection between the battery cell stack (100) and an external device. Specifically, the busbar frame (300) can be positioned on the front or rear side of the battery cell stack (100) as illustrated. At least one of a busbar (310, 320) and a module connector can be mounted on the busbar frame (300). As illustrated in FIG. 5, one side of the busbar frame (300) is connected to the front or rear side of the battery cell stack (100), and the other side of the busbar frame (300) can be connected to the busbar (310, 320).

[0064] The busbar frame (300) may include an electrically insulating material. The busbar frame (300) may limit contact between the busbars (310, 320) and other parts of the battery cells (110) other than the parts where the busbars are connected to the electrode leads (111, 112), thereby preventing electrical short circuits from occurring.

[0065] The busbar frame (300) may be positioned on the front and rear sides of the battery cell stack (100), respectively.

[0066] The busbar (310, 320) is mounted on one side of the busbar frame (300) and may be used to electrically connect the battery cell stack (100) or battery cells (110) and an external device circuit. The busbar (310, 320) is positioned between the battery cell stack (100) or busbar frame (300) and the end plate (400), thereby being protected from external impacts, etc., and minimizing the deterioration of durability due to external moisture, etc.

[0067] The bus bar (310, 320) can be electrically connected to the battery cell stack (100) through the electrode lead (111, 112) of the battery cell (110).

[0068] Specifically, the electrode leads (111, 112) of the battery cells (110) can be bent and connected to the bus bars (310, 320) after passing through the slits formed in the bus bar frame (300). The battery cells (110) constituting the battery cell stack (100) can be connected in series or in parallel by the bus bars (310, 320).

[0069] The busbars (310, 320) may include terminal busbars (320) for electrically connecting one battery module (1000) to another battery module (1000). At least a portion of the terminal busbars (320) may be exposed to the outside of the end plate (400) to be connected to another battery module (100), and the end plate (400) may be provided with terminal openings (410) for this purpose.

[0070] The terminal bus bar (320) may further include a protrusion protruding upward, unlike other bus bars (310), and the protrusion may be exposed to the outside of the battery module (1000) through the terminal opening (410). The terminal bus bar (320) may be connected to another battery module (1000) or a BDU (Battery Disconnect Unit) by the protrusion exposed through the terminal opening (410), and may form an HV (High voltage) connection with them.

[0071] The end plate (400) may be used to protect the battery cell stack (100) and electrical components connected thereto from external physical impact by covering the open surface of the module case (200). To this end, the end plate (400) may be manufactured from a material having a predetermined strength, and for example, the end plate (400) may include a metal such as aluminum.

[0072] The end plate (400) can be combined with the module case (200) while covering the busbar frame (300) or busbar (310, 320) located on one side of the battery cell stack (100). Each corner of the end plate (400) can be combined with a corresponding corner of the module case (200) by welding or the like.

[0073] Additionally, an insulating cover (500) for electrical insulation may be positioned between the end plate (400) and the busbar frame (300). The insulating cover (500) may include an electrically insulating material and may block the busbars (310, 320) from contacting the end plate (400). The insulating cover (500) may be positioned on the inner surface of the end plate (400) and may be in close contact with the inner surface of the end plate (400), but this is not necessarily the case. The end plate (400) may be positioned on one surface and the other surface of the module case (200) so as to cover both surfaces of the battery cell stack (100).

[0074] In addition, the battery pack (2000) according to the present invention may include a venting device (2500) for venting gas leaking from the battery module (1000) or battery cell (110).

[0075] FIG. 5 is a drawing showing a portion of a side of a battery pack having a venting device arranged according to an embodiment of the present invention as viewed from the outside, FIG. 6 is a drawing showing a portion of a side of a battery pack having a venting device arranged according to an embodiment of the present invention as viewed from the inside, and FIGS. 7 to 9 are a side view, a front view, and a plan view, respectively, of a venting device according to an embodiment of the present invention.

[0076] The venting device (2500) may include an exhaust plate (2510) having an exhaust port (2520) formed therein, a mesh (2530) disposed on one surface of the exhaust plate (2510), and a vortex-forming column (2550).

[0077] The exhaust plate (2510) is formed with one or more exhaust ports (2520) so that gas flowing out of the battery cell (110) or module (1000) can be vented to the outside of the pack (2000) through the exhaust ports (2520).

[0078] A plurality of exhaust ports (2520) may be arranged on the exhaust plate (2510), and as shown in FIG. 8, each exhaust port (2520) may extend horizontally, and a plurality of exhaust ports (2520) may be arranged spaced apart from each other vertically.

[0079] The exhaust plate (2510) may be formed in a plate shape and may form a part of the side portion (2120).

[0080] In this embodiment, the exhaust plate (2510) is illustrated as forming a part of the side portion (2120), but may also be placed on the bottom portion (2110) or the top cover.

[0081] In this embodiment, an inclined plate (2540) may be placed on the inner surface of the exhaust plate (2510) (i.e., the surface of the exhaust plate (2510) facing the inside of the pack (2000).

[0082] The inclined plates (2540) can be respectively placed in the exhaust ports (2520), and the upper ends of the inclined plates (2540) can be connected to the upper sides of each exhaust port (2520), and as shown in FIG. 7, the inclined plates (2540) can be placed so as to be inclined downward in the front (in the direction toward the inside of the pack (2000)) of the exhaust ports (2520).

[0083] The angle (θ) formed by the inclined plate (2540) with the exhaust port (2520) or exhaust plate (2510) may be 10 to 80 degrees, 20 to 70 degrees, or 30 to 60 degrees.

[0084] In this way, the inclined plates (2540) are placed in each exhaust port (2520), and the inclined plates (2540) function as baffles to reduce the amount of particles flowing into the exhaust port (2520).

[0085] As shown in Fig. 8, the lower end of the inclined plate (2540) may be positioned higher than the lower end of the exhaust port (2520) when viewed from the front. As a result, particles may be blocked to some extent by the inclined plate (2540), and gas may be smoothly discharged through the exhaust port (2520).

[0086] A mesh (2530) may be arranged on the outer surface of the exhaust plate (2510) (i.e., the surface of the exhaust plate (2510) facing the outside of the pack (2000)).

[0087] The mesh (2530) may be arranged so as to cover the entire exhaust port (2520) on the outer surface of the exhaust plate (2510). By arranging the mesh (2530) to cover the exhaust port (2520) in this way, when gas is discharged from the pack (2000) through the exhaust port (2520), particles may not be discharged to the outside of the pack (2000) by the mesh (2530).

[0088] In the venting device (2500), the vortex forming column (2550) can be arranged inwardly of the pack (2000) away from the exhaust plate (2510).

[0089] One or more vortex forming columns (2550) may be spaced apart from the exhaust plate (2510), and as illustrated, a plurality of vortex forming columns (2550) may be spaced apart along the exhaust plate (2510), and a plurality of vortex forming columns (2550) may be arranged parallel to the exhaust plate (2510).

[0090] As shown in Fig. 8, the top of the vortex-forming column (2550) may be positioned higher than the bottoms of all the inclined plates (2540) when viewed from the front. That is, the top of the vortex-forming column (2550) may be positioned higher than the bottom of the inclined plate (2540) positioned at the topmost position, and may be positioned lower than the top of the inclined plate (2540) positioned at the topmost position. Accordingly, the amount of particles flowing into the exhaust port (2520) positioned below the bottom of the inclined plate (2540) may be reduced by the vortex-forming column (2550).

[0091] The lower end of the vortex forming column (2550) may be placed on the bottom (2110) of the pack (2000) and may also be placed on the connecting plate (2560).

[0092] In the present embodiment, a connecting plate (2560) may be disposed at the bottom of the exhaust plate (2510) and extending into the interior of the battery pack (2000), as illustrated in FIGS. 7 and 9. Each vortex forming pillar (2550) may be disposed on this connecting plate (2560) and may be connected to the exhaust plate (2510) by each connecting plate (2560). A plurality of connecting plates (2560) may be connected to each other, and the middle portions of each connecting plate (2560) may be connected to each other by a bridge, as illustrated in FIG. 9.

[0093] In this embodiment, the vortex forming column (2550) is shown as having a circular cross-section, but may be formed in various shapes such as a triangle, square, or polygon.

[0094] Figure 10 is a diagram illustrating the results of a flow simulation for a vortex-forming column (2550). As illustrated, when airflow flows through a vortex-forming column (2550) having a circular, square, or triangular cross-section, it can be seen that a vortex is formed behind the vortex-forming column (2550).

[0095] In this way, in the present embodiment, a vortex-forming column (2550) is arranged on the inside of the exhaust plate (2510), and a vortex is generated by the vortex-forming column (2550), and particles are trapped in the vortex, thereby reducing the amount of particles flowing into the exhaust port. In addition, by reducing the amount of particles flowing into the exhaust port (2520), it is possible to prevent the mesh (2530) arranged in the exhaust port (2520) from being clogged.

[0096] In this embodiment, the venting device (2500) may be formed as an integrated unit by connecting the exhaust plate (2510) and the vortex forming column (2550) with a connecting plate (2560).

[0097] The battery pack (2000) according to the present invention may additionally include various control and protection systems, such as a BMS (Battery Management System).

[0098] The battery module (1000) and battery pack (2000) according to the present invention can be applied to various devices. Specifically, they can be applied to means of transportation such as electric bicycles, electric vehicles, and hybrid vehicles, or ESS (Energy Storage Systems), but are not limited thereto and can be applied to various devices capable of using secondary batteries.

[0099] Meanwhile, in the embodiment of the present invention, an example in which a plurality of battery modules are accommodated inside a battery pack is shown, but a plurality of cells may be arranged inside the battery pack.

[0100] Although the present invention has been described with reference to preferred embodiments as described above, it is not limited to the above embodiments, and various changes and modifications may be made by a person having ordinary skill in the art to which the invention pertains within a scope that does not depart from the spirit of the present invention.

[0101] The present invention can provide a venting device for a battery and a battery pack that reduce the amount of particles that interfere with gas venting to the outside of a battery pack, thereby allowing gas leaking from cells inside the pack to be smoothly vented to the outside of the pack.

Claims

1. An exhaust plate including one or more exhaust ports; and A vortex forming column arranged spaced apart from the above exhaust plate and for forming a vortex; A venting device for a battery comprising:

2. In paragraph 1, A venting device for a battery further comprising a mesh covering the exhaust port.

3. In paragraph 2, The above mesh is a venting device for a battery arranged on the outer surface of the above exhaust plate.

4. In paragraph 1, A venting device for a battery further comprising an inclined plate disposed in a downwardly inclined manner in front of the exhaust port in the exhaust plate.

5. In paragraph 4, The above-mentioned inclined plate is a venting device for a battery, each of which is arranged in a plurality of the above-mentioned exhaust ports.

6. In paragraph 1, A venting device for a battery, wherein a plurality of the above vortex forming columns are arranged parallel to the above exhaust plate.

7. In paragraph 4, A venting device for a battery, wherein the upper end of the above vortex forming column is positioned higher than the lower end of the above inclined plate.

8. In paragraph 1, A venting device for a battery having a circular cross-section of the above vortex forming column.

9. In paragraph 1, A venting device for a battery further comprising a connecting plate extending from the lower portion of the exhaust plate to the vortex forming column.

10. In paragraph 9, A venting device for a battery, wherein the above vortex forming pillars are respectively arranged on a plurality of the above connecting plates.

11. One or more battery modules; a housing accommodating the battery module; and A venting device for discharging gas to the outside of the housing; The above venting device an exhaust plate comprising one or more exhaust ports; and A vortex forming column arranged inwardly spaced from the above exhaust plate; Battery pack containing.

12. In paragraph 11, A battery pack wherein the venting device further comprises a mesh covering the exhaust port.

13. In paragraph 12, The above mesh is a battery pack arranged on the outer surface of the exhaust plate.

14. In paragraph 11, A battery pack wherein the venting device further includes an inclined plate disposed in a downwardly inclined manner in front of the exhaust port on the inner side of the exhaust plate.

15. In paragraph 14, The above-mentioned inclined plates are battery packs each arranged in a plurality of the above-mentioned exhaust ports.

16. In paragraph 11, A battery pack wherein a plurality of the above vortex forming columns are arranged parallel to the exhaust plate.

17. In paragraph 14, A battery pack wherein the top of the above vortex forming column is positioned higher than the bottom of the above inclined plate.

18. In paragraph 11, A battery pack having a circular cross-section of the above vortex forming column.

19. In paragraph 11, A battery pack wherein the venting device further comprises a connecting plate extending from the lower portion of the exhaust plate to the vortex forming column.

20. In paragraph 19, A battery pack in which the above vortex forming pillars are respectively arranged on a plurality of the above connecting plates.

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