Battery pack and device including the same

Abstract

A battery pack according to one certain embodiment of the disclosure includes at least one battery assembly including a plurality of battery cells, and a battery pack frame storing the at least one battery assembly. The battery pack frame includes a bottom frame on which the battery assembly is placed, and in which an exhaust space is provided. The battery assembly includes battery cells stacked along one direction, and a cell frame extending along edges of the battery cells and covering the edges of the battery cells. A cell exhaust portion is formed in a portion of the cell frame facing the bottom frame.

Description

Technical Field

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2024-0035065, filed March 13, 2024, and Korean Patent Application No. 10-2024-0197354, filed December 26, 2024, the entire contents of which are incorporated herein by reference.

[0003] This disclosure relates to a battery pack and an apparatus including the battery pack, and more specifically, to a battery pack that can minimize the propagation of thermal runaway and prevent structural collapse, and an apparatus including the battery pack. Background Technology

[0004] In modern society, with the daily use of portable devices such as mobile phones, laptops, camcorders, and digital cameras, technological development in fields related to mobile devices, as described above, has commenced. Furthermore, in an attempt to address issues such as air pollution caused by existing gasoline vehicles using fossil fuels, rechargeable batteries are being used as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (P-HEVs), and the like. Therefore, the need to develop rechargeable batteries is increasing.

[0005] Currently commercially available rechargeable batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among these, lithium-ion batteries have attracted significant attention due to their advantages, such as exhibiting almost no memory effect compared to nickel-based batteries, allowing for free charging and discharging, and possessing a very low self-discharge rate and high energy density.

[0006] This type of lithium secondary battery primarily uses lithium-based oxide and carbon materials as the positive and negative electrode active materials, respectively. The lithium secondary battery includes an electrode assembly and an external material or battery casing. In the electrode assembly, positive and negative electrode plates, respectively coated with positive and negative electrode active materials, are arranged with a separator inserted between them. The external material or battery casing seals and stores the electrode assembly together with the electrolyte.

[0007] Generally, lithium secondary batteries can be classified according to the shape of their external materials as: can-type secondary batteries with electrode components built into a metal can; and bag-type secondary batteries with electrode components built into a bag of aluminum laminates.

[0008] In the case of secondary batteries for small devices, two or three battery cells are arranged, but in the case of secondary batteries for medium and large devices such as automobiles, battery modules with multiple battery cells electrically connected are used. In such battery modules, multiple battery cells are connected in series or parallel to form a cell assembly, thereby increasing capacity and output. In addition, one or more battery modules can be installed together with various control and protection systems such as BDU (Battery Disconnect Unit), BMS (Battery Management System), and cooling system to form a battery pack.

[0009] A battery pack may include battery modules as a sub-concept, and a battery module may include battery cells as a sub-concept. Furthermore, the number of battery cells included in a battery module or the number of battery modules included in a battery pack can be determined in various ways depending on the output or capacity of the battery pack required by the electric vehicle.

[0010] Recently, key requirements for battery modules or battery packs include fast charging and heat dissipation control.

[0011] First, one of the problems with fast charging is the heat generated during the process. In other words, fast charging essentially requires a cooling system to manage the heat generated during the process to an appropriate level. Traditional battery modules use an edge cooling structure that cools only one side (usually the bottom) of the battery cell. When fast charging a battery module with an edge cooling structure, the temperature difference between the top and bottom increases, and with insufficient cooling in the top, fast charging efficiency will inevitably decrease. Therefore, ensuring effective cooling performance can be very important for fast charging.

[0012] Next, regarding heat propagation control, when a thermal event occurs in any of the multiple battery cells included in the battery pack, it is necessary to prevent the thermal event from propagating to other battery cells.

[0013] If heat propagation between battery cells is not properly suppressed, it can lead to thermal events in other battery cells within the battery pack, potentially causing more serious problems such as a fire or explosion of the battery pack. Furthermore, a fire or explosion within the battery pack could cause significant damage to life and property in the surrounding area. Therefore, such battery packs require configurations capable of appropriately controlling these thermal events and their propagation.

[0014] In summary, there is a growing demand for battery packs equipped with effective cooling devices for fast charging and devices that can suppress heat transfer between battery cells. Summary of the Invention

[0015] Technical issues

[0016] The purpose of this disclosure is to provide a battery pack and an apparatus including the battery pack, the battery pack being provided with an effective cooling device for fast charging and a device capable of suppressing heat transfer between battery cells.

[0017] However, the technical objectives to be addressed by the embodiments of this disclosure are not limited to the above-mentioned objectives, and various extensions can be made within the scope of the technical ideas included in this disclosure.

[0018] Technical solution

[0019] A battery pack according to one aspect of this disclosure includes: at least one battery assembly comprising a plurality of battery cells; and a battery pack frame storing the at least one battery assembly. The battery pack frame includes a bottom frame on which the battery assembly is placed, and a venting space is provided in the bottom frame. The battery assembly includes battery cells stacked in one direction, and a cell frame extending along and covering the edges of the battery cells. A cell venting portion is formed in the portion of the cell frame facing the bottom frame.

[0020] The cell exhaust section can be positioned to correspond to the exhaust space.

[0021] The cell frame may include: a first frame covering the lower end of the battery cell; a second frame covering the upper end of the battery cell; and a third frame and a fourth frame covering the two ends of the battery cell between the lower and upper ends, respectively. The cell vent may be formed in the first frame.

[0022] Each of the battery cells is provided with a cell frame, such that the battery cells and the cell frames can correspond one-to-one with each other.

[0023] When exhaust gas is discharged from the battery cell, the cell exhaust section can communicate with the exhaust space of the bottom frame.

[0024] The cell exhaust section can be configured to protrude toward the direction of the bottom frame and be inserted into the exhaust space inside the bottom frame.

[0025] The battery assembly may include a cell assembly frame for storing the battery cells. The cell assembly frame may include: an upper frame that covers the upper part of the battery cells; and a lower frame that covers the lower part of the battery cells.

[0026] The vent cover, which opens under a specified pressure or higher, can be located below the vent of the battery cell.

[0027] The vent cover can cover the vent of the battery cell.

[0028] The exhaust cover can be configured to protrude toward the direction of the bottom frame, and an exhaust space toward the bottom frame is inserted.

[0029] The bottom frame may include an outer frame and an inner frame. The outer frame may be located below the inner frame, and the exhaust space may be provided by the outer frame and the inner frame.

[0030] The exhaust space can be configured as multiple, and the exhaust gas generated in the battery cell passes through the multiple exhaust spaces in sequence.

[0031] The inner frame may include a recess and a protrusion. The exhaust space may include a first exhaust space disposed in the recess and a second exhaust space disposed in the protrusion. The inner frame may be formed with filter holes connecting the first exhaust space and the second exhaust space.

[0032] Multiple bends in the exhaust flow path can be formed inside the protrusion.

[0033] An exhaust device that opens or ruptures under a specified pressure or higher can be provided inside the protrusion.

[0034] The battery pack may include a heat sink having at least one cooling plate disposed at at least one location between the battery cells.

[0035] The coolant can flow inside the cooling plate.

[0036] The battery cell and the cooling plate can be in surface contact with each other.

[0037] The battery pack may include at least one pad member, which is disposed at at least one location between the battery cells.

[0038] The battery pack frame may include a side surface frame extending along the edge of the bottom frame, and the side surface frame is provided with a side exhaust space communicating with the exhaust space. Exhaust gas flowing into the exhaust space of the bottom frame can move to the side exhaust space.

[0039] According to another aspect of this disclosure, the device includes the aforementioned battery pack.

[0040] Beneficial effects

[0041] According to a specific embodiment of this disclosure, surface cooling of the battery cell can be performed by a cell frame covering the edge of the battery cell and a cooling plate arranged between the battery cells, thereby improving cooling performance.

[0042] Furthermore, when a thermal event occurs in a battery cell, the high-temperature exhaust gases, particles, etc., emitted from the battery cell move along a specific, predetermined path through the cell exhaust section provided in the cell frame. This minimizes the propagation of a thermal event generated in a particular battery cell to other battery cells.

[0043] The effects of this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the description of the appended claims any other additional effects not mentioned above. Attached Figure Description

[0044] Figure 1 This is a perspective view showing a battery pack according to an embodiment of the present disclosure.

[0045] Figure 2 It is shown in Figure 1 A perspective view showing the battery pack with the battery pack cover removed.

[0046] Figure 3 It is shown Figure 1 A perspective view of the battery pack frame included in the battery pack.

[0047] Figure 4 It is shown Figure 1 A perspective view of one of the battery components included in the battery pack.

[0048] Figure 5 yes Figure 4 An exploded perspective view of the battery assembly.

[0049] Figure 6 It is shown Figure 5 A perspective view of the battery assembly, showing the battery cell stack and lower frame connected together.

[0050] Figure 7 This shows the pad component and Figure 6 A perspective view of the battery cell stack and the lower frame in a separated state.

[0051] Figure 8 This is a perspective view showing a battery cell and a cell frame according to an embodiment of the present disclosure.

[0052] Figure 9 yes Figure 8 An exploded perspective view of the battery cell and cell frame.

[0053] Figure 10This is a perspective view showing a battery cell according to an embodiment of the present disclosure.

[0054] Figure 11 and Figure 12 It is a cross-sectional perspective view of the battery cell connected to the cell frame.

[0055] Figure 13 This is a perspective view showing a cell frame according to an embodiment of the present disclosure.

[0056] Figure 14 It is a perspective view showing the state in which two battery cell frames are connected together.

[0057] Figure 15 and Figure 16 These are perspective and front views showing the radiator and pad components according to embodiments of the present disclosure.

[0058] Figure 17 This is a front view showing the heat sink, pad components, and some cell frames.

[0059] Figure 18 This is an exploded perspective view showing the battery cell, cooling plate, and pad assembly connected together to the cell frame.

[0060] Figure 19 This is a perspective view showing a heat sink according to an embodiment of the present disclosure.

[0061] Figure 20 It is shown Figure 19 A perspective view of a cooling plate and cooling pipe in a radiator.

[0062] Figure 21 It is shown Figure 19 A perspective view of one of the cooling plates included in the radiator.

[0063] Figure 22 yes Figure 21 Exploded perspective view of the cooling plate.

[0064] Figure 23 yes Figure 19 Front view of the radiator.

[0065] Figure 24 This is a perspective view showing the battery cell stack and lower frame connected together when viewed from below.

[0066] Figure 25 This is a perspective view of the battery cell stack when viewed from below.

[0067] Figure 26 It shows along Figure 6 A cross-sectional perspective view of the appearance cut by the cutting line AA.

[0068] Figure 27 yes Figure 26 A magnified view of part "B".

[0069] Figure 28 This is an exploded perspective view showing the lower frame according to an embodiment of the present disclosure.

[0070] Figure 29 (a) and (b) are perspective views and cross-sectional perspective views of an exhaust plate according to an embodiment of the present disclosure, respectively.

[0071] Figure 30 This is a perspective view showing a battery pack frame and battery assembly according to an embodiment of the present disclosure.

[0072] Figure 31 It shows along Figure 30 A cross-sectional view of the cross section cut by the cutting line DD.

[0073] Figure 32 yes Figure 31 A magnified view of a portion of the letter "E".

[0074] Figure 33 This is a perspective view showing the bottom frame according to an embodiment of the present disclosure.

[0075] Figure 34 This shows that the exhaust plate is arranged in Figure 33 A perspective view of the state in the bottom frame.

[0076] Figure 35 This is a perspective view showing the inner frame and cover plate according to an embodiment of the present disclosure.

[0077] Figure 36 yes Figure 35 A magnified view of a portion of the "F".

[0078] Figure 37 This is a perspective view showing a portion of the inner frame removed from the bottom frame according to an embodiment of the present disclosure.

[0079] Figure 38 This is a perspective view showing the outer frame and wiring board according to an embodiment of the present disclosure.

[0080] Figure 39 (a) is a partial view showing the holes in the outer frame. Figure 39 (b) is a partial view showing the state of the exhaust device connected to the outer frame hole.

[0081] Figure 40 This is a plan view showing the state in which the entire inner frame in the bottom frame is removed according to an embodiment of the present disclosure.

[0082] Figure 41 This is a partial cross-sectional view showing a portion of the cross-section of a battery pack according to a modified embodiment of the present disclosure. Detailed Implementation

[0083] In the following, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings to enable those skilled in the art to readily practice the present disclosure. The present disclosure may be implemented in various different forms and is not limited to the embodiments described herein.

[0084] Parts irrelevant to the description will be omitted in order to clearly describe this disclosure, and throughout the description, the same reference numerals denote the same or similar elements.

[0085] Furthermore, in the accompanying drawings, the dimensions and thicknesses of each element are arbitrarily shown for ease of description, and this disclosure is not necessarily limited to those shown in the drawings. In the accompanying drawings, the thicknesses of layers, regions, etc., are exaggerated for clarity. In the accompanying drawings, the thicknesses of portions and regions are exaggerated for ease of description.

[0086] Furthermore, it should be understood that when it is stated that an element, such as a layer, membrane, region, or plate, is "on" or "above" another element, that element may be directly on the other element, or there may be intermediate elements present. Conversely, when it is stated that an element is "directly on" another element, it means that there are no other intermediate elements present. Additionally, a specific portion located "above" or "on" a reference portion refers to a specific portion located above or below the reference portion, not specifically a portion "above" or "on" a portion facing the opposite direction of gravity.

[0087] Furthermore, throughout the specification, unless otherwise stated, when a part is referred to as “comprising” or “including” a component, it means that the part may further include other components, but does not exclude other components.

[0088] Furthermore, throughout the instruction manual, when referred to as a "plane," it means when the target portion is viewed from above, and when referred to as a "section," it means when the target portion is viewed from the side of a vertically cut cross-section.

[0089] Figure 1 This is a perspective view showing a battery pack according to an embodiment of the present disclosure. Figure 2 It is shown in Figure 1 A perspective view showing the battery pack with the battery pack cover removed. Figure 3 It is shown Figure 1 A perspective view of the battery pack frame included in the battery pack.

[0090] Reference Figures 1 to 3According to a specific embodiment of the present disclosure, a battery pack 1000 includes: at least one battery assembly 100 comprising a plurality of battery cells; and a battery pack frame 1100 for storing the at least one battery assembly 100. The battery pack frame 1100 includes a bottom frame 1200 on which the battery assembly 100 is placed, and a venting space VS is provided in the bottom frame. The battery assembly 100 includes battery cells stacked in one direction and a cell frame extending along and covering the edges of the battery cells, and a cell vent is formed in the portion of the cell frame facing the bottom frame 1200. The cell vent and venting space of the bottom frame 1200 will be described later.

[0091] In particular, in this disclosure, the cell exhaust portion formed in the portion of the cell frame facing the bottom frame 1200 includes both the case where the cell exhaust portion directly faces the bottom frame 1200 and there is no additional configuration between the cell exhaust portion and the bottom frame 1200, and the case where there is an additional configuration inserted between the cell exhaust portion and the bottom frame 1200.

[0092] The battery assembly 100 according to this embodiment will now be described. According to this disclosure, a battery assembly refers to a single unit stored in a battery pack frame 1100, and other structural features are not limited, as long as the battery cells are stacked in one direction while being covered by the cell frame.

[0093] Figure 4 It is shown Figure 1 A perspective view of one of the battery components included in the battery pack. Figure 5 yes Figure 4 An exploded perspective view of the battery assembly. Figure 6 It is shown Figure 5 A perspective view of the battery assembly, showing the battery cell stack and lower frame connected together.

[0094] Reference Figures 4 to 6 According to a specific embodiment of the present disclosure, a battery assembly 100 includes: battery cells 110 stacked in one direction; and a cell frame 300 extending along a corresponding edge of the battery cells 110 and covering said edge of the battery cells 110.

[0095] Specifically, when each battery cell 110 is covered by the cell frame 300, the battery cells 110 can be stacked along one direction to form a battery cell stack 120. That is, a cell frame 300 can be provided for each of the battery cells 110, such that the battery cells 110 and the cell frames 300 correspond one-to-one with each other. As an example, each of the battery cells 110 can be stacked along a direction parallel to the X-axis and covered by the cell frame 300, thereby forming the battery cell stack 120. The detailed structure of the cell frame 300 will be described later.

[0096] The battery assembly 100 according to this embodiment may further include a cell assembly frame 200 for storing battery cells 110. Specifically, the cell assembly frame 200 may store battery cells 110 covered by the cell frame 300, i.e., battery cell stack 120. The cell assembly frame 200 may include: an upper frame 210 covering the upper part of the battery cells 110; and a lower frame 220 covering the lower part of the battery cells 110.

[0097] The upper frame 210 may include: a side surface portion 211 covering two side surfaces according to the stacking direction of the battery cells 110 in the battery cell stack 120; and a top plate portion 212 covering the upper surface of the battery cell stack 120. In particular, the top plate portion 212 may cover the upper part of the cell frame 300 in the battery cell stack 120. The side surface portions 211 may extend downward from both sides of the top plate portion 212 facing each other.

[0098] Meanwhile, the cell assembly frame 200 may include a mounting portion 200M, which is used to secure the battery assembly 100 to the battery pack frame described later. The mounting portion 200M may be formed with mounting holes, and bolt members may pass through the mounting holes to fasten to the battery pack frame described later. As an example, the mounting portion 200M may be provided on the side surface portion 211 of the upper frame 210, and its number or size is not particularly limited.

[0099] The lower frame 220 may include a first lower cover 221, a second lower cover 222, and an exhaust plate 223 located between the first lower cover 221 and the second lower cover 222. Furthermore, the lower frame 220 may also include an adhesive portion 224 that joins the exhaust plate 223 and the battery cell stack 120. The adhesive portion 224 may extend along the edge of the exhaust plate 223. The lower frame 220 may be connected to the upper frame 210 to form a cell assembly frame 200, and this cell assembly frame may cover the upper surface, lower surface, and two side surfaces of the battery cell stack 120. (See below for further details.) Figure 28 and Figure 29 The following describes the first lower cover 221, the second lower cover 222, and the exhaust plate 223.

[0100] Figure 7 This shows the pad component and Figure 6 A perspective view of the battery cell stack and the lower frame in a separated state. Figure 8 This is a perspective view showing a battery cell and a cell frame according to an embodiment of the present disclosure. Figure 9 yes Figure 8 An exploded perspective view of the battery cell and cell frame. Figure 10 This is a perspective view showing a battery cell according to an embodiment of the present disclosure.

[0101] Reference Figures 7 to 10 The battery cell 110 according to this embodiment can be of various forms, and as an example, the battery cell 100 according to this embodiment can be such as Figures 8 to 10 The pouch-type battery cell shown is illustrated. Although the pouch-type battery cell will be described below, the battery cell 110 according to this embodiment is not limited thereto, and various types of battery cells can be applied.

[0102] According to this embodiment, the battery cell 110 can be configured such that an electrode assembly having electrode leads 111 protruding in one or both directions is stored in a pouch-shaped housing 114. The battery cell 110 can have a rectangular sheet shape. The battery cell 110 can have a lower end 114a, an upper end 114b, and two ends 114c and 114d.

[0103] The battery cell 110 can be formed by housing an electrode assembly in a pouch-shaped housing 114 made of a laminate including resin layers and metal layers, and then attaching the outer periphery of the pouch-shaped housing 114. As an example, the battery cell 110 may have a structure in which two electrode leads 111 face each other and protrude from one end 114c and the other end 114d of the cell body 113. As another example, it is also possible for all the electrode leads 111 of the battery cell 110 to protrude in one direction. One of the electrode leads 111 is a positive electrode lead, and the other is a negative electrode lead.

[0104] The battery cell 110 can be manufactured by attaching two ends 114c, 114d of the pouch-shaped housing 114 and a lower end 114a connecting these two ends while the electrode assembly (not shown) is stored in the pouch-shaped housing 114. In other words, the battery cell 110 according to the embodiment of this disclosure has a total of three sealing portions 114s, wherein the sealing portions 114s have a structure that is sealed by a method such as melting, and the remaining upper end 114b can be composed of folded portions. That is, the battery cell 110 according to this embodiment can be a pouch-shaped secondary battery in which the electrode assembly is stored inside the pouch-shaped housing 114 and the outer peripheral side of the pouch-shaped housing 114 is sealed to form the sealing portions 114s. Figure 10The image only shows the state where sealing portions 114s are formed at the two ends 114c and 114d of the bag-shaped housing 114, and no sealing portion is shown at the lower end 114a. However, the sealing portion at the lower end 114a is folded to one side after sealing to utilize space. This will... Figure 12 This will be described again in the text.

[0105] The laminated battery housing 114 may include an inner resin layer for sealing, a metal layer for preventing material penetration, and an outermost resin layer. Based on the electrode assembly inside the battery housing 114, the inner resin layer may be located on the innermost side, the outer resin layer may be located on the outermost side, and the metal layer may be located between the inner and outer resin layers.

[0106] The outer resin layer exhibits excellent tensile strength and weather resistance relative to its thickness, and can also demonstrate electrical insulation properties to protect the electrode assembly from external influences. This outer resin layer may include polyethylene terephthalate (PET) resin or nylon resin. A metal layer prevents air, moisture, etc., from entering the interior of the pouch cell. This metal layer may include aluminum (Al). With the electrode assembly embedded, the inner resin layers can be thermally fused together by applied heat and / or pressure. This inner resin layer may include cast polypropylene (CPP) or polypropylene (PP).

[0107] The pouch-shaped housing 114 is divided into two parts, and a concave storage portion in at least one of these parts can be formed in which an electrode assembly can be seated. Along the outer circumference of the storage portion, the inner resin layers of the two parts of the pouch-shaped housing 114 can be joined together to form a seal 114s. In this way, the pouch-shaped housing can be sealed to prepare a battery cell 110, which is a pouch-shaped secondary battery.

[0108] As described above, the battery cells 110 in the battery assembly 100 can be configured as a plurality of cells. As an example, the plurality of battery cells 110 can be stacked along one direction to be electrically connected to each other, thereby forming a battery cell stack 120. As an example, the plurality of battery cells 110 can be stacked upright along a direction parallel to the X-axis. Thus, electrode leads 111 can protrude in a direction perpendicular to the stacking direction of the battery cells 110. In the battery cell 110, one electrode lead 111 can protrude in the Y-axis direction, and another electrode lead 111 can protrude in the -Y-axis direction. If the electrode lead 111 is a battery cell that protrudes only in one direction, then the electrode lead 111 can protrude in either the Y-axis direction or the -Y-axis direction.

[0109] Figure 11 and Figure 12 This is a cross-sectional perspective view of the battery cell connected to the cell frame. Specifically, Figure 11 It is a cross-sectional perspective view of the battery cell connected to the cell frame along the xy plane, and Figure 12 It is a perspective view of a cross-section of a battery cell connected to a cell frame, cut along the xz plane. Figure 13 This is a perspective view showing a cell frame according to an embodiment of the present disclosure. Figure 14 It is a perspective view showing the state in which two battery cell frames are connected together.

[0110] Refer to together Figure 2 and Figures 8 to 14 According to this embodiment, the cell frame 300 can extend along the edge of the battery cell 110 and cover the battery cell 110. A cell vent 300V is formed in the portion of the cell frame 300 facing the bottom frame 1200. That is, the cell vent 300V can be formed in the portion of the cell frame 300 corresponding to the lower end portion 114a of the battery cell 110.

[0111] Specifically, the cell frame 300 may include: a first frame 310 covering the lower end 114a of the battery cell 110; a second frame 320 covering the upper end 114b of the battery cell 110; and a third frame 330 and a fourth frame 340 respectively covering the two ends 114c and 114d of the battery cell 110. As described above, although the battery cells 110 and the cell frames 300 correspond one-to-one with each other, each of the battery cells 110 can be covered by each of the cell frames 300.

[0112] A cell venting section 300V can be formed in the first frame 310 within the cell frame 300. Specifically, the cell venting section 300V can be a portion that guides the discharge of high-temperature exhaust gases or particles generated from the battery cell 110 in the event of a thermal event or thermal runaway in any of the battery cells 110. This cell venting section 300V can be disposed in the center of the first frame 310 for covering the lower end portion 114a of the battery cell 110.

[0113] As an example, the cell exhaust section 300V may include a first section 300V1, a second section 300V2, and a third section 300V3. When the first section 300V1, the second section 300V2, and the third section 300V3 extend downwards, an open space may be formed between them. However, this is merely one exemplary structure of the cell exhaust section 300V, and it is sufficient if it has an open shape and can guide the emission of high-temperature exhaust gases or particles generated from the battery cell 110; its form is not particularly limited.

[0114] The portion of the first frame 310, excluding the cell exhaust section 300V, is in close contact with the lower end 114a of the battery cell 110. However, the portion corresponding to the cell exhaust section 300V is perforated in the downward direction, allowing high-temperature exhaust gases or particles generated by the battery cell 110 to be discharged in the downward direction through the cell exhaust section 300V. In other words, the battery module according to this embodiment has a directional exhaust structure that discharges exhaust gases, particles, etc., in a predetermined direction through the cell frame 300 having the cell exhaust section 300V. Specifically, since the cell exhaust section 300V is formed in the portion of the cell frame 300 corresponding to the lower end 114a of the battery cell 110, a so-called "bottom exhaust" structure in which exhaust gases, particles, etc., are discharged in the downward direction can be achieved. The advantages of the "bottom exhaust" structure will be described again below.

[0115] At the same time, refer to Figures 8 to 12 The adhesive member 130 can be attached to the lower end portion 114a of the battery cell 110, excluding the portion corresponding to the cell vent 300V. As described above, the lower end portion 114a of the battery cell 110 can be a sealing portion 114s that performs the sealing of the pouch-type housing 114 (see [link to documentation]). Figure 10 and Figure 12 Furthermore, the upper end portion 114b of the battery cell 110 may not be a sealed portion, but rather a folded portion, which is the part of the pouch-shaped housing 114 that is folded. When a thermal event or thermal runaway occurs in the battery cell 110, exhaust gas is generated within the battery cell 110, and the internal pressure of the battery cell 110 increases. This exhaust gas can be discharged primarily through the sealed portion 114s of the battery cell 110. That is, due to the increase in internal pressure, the seal of some portions of the sealed portion 114s may be released, and exhaust gas may be discharged through the released portion of the sealed portion 114s.

[0116] In the battery assembly 100 according to this embodiment, the battery cell 110 can be arranged such that the lower end portion 114a of the battery cell 110 becomes a sealed portion 114s, and the upper end portion 114b of the battery cell 110 becomes a folded portion. This configuration makes it possible to more clearly realize a "bottom exhaust" structure in which exhaust gases, particles, etc. generated in the battery cell 110 are discharged in a downward direction. Figure 12 The diagram shows the state in which the sealing portion 114s, corresponding to the lower end 114a of the battery cell 110, is folded for space utilization after sealing is completed.

[0117] Preferably, even in the downward direction, the exhaust gas from the battery cell 110 is discharged through the cell exhaust portion 300V of the cell frame 300. For this purpose, the adhesive member 130 can be attached to the lower end portion 114a of the battery cell 110, excluding the portion corresponding to the cell exhaust portion 300V. The adhesive member 130 can be, for example, adhesive tape.

[0118] Since the sealing degree of the portion of the lower end 114a of the battery cell 110 to which the adhesive member 130 is attached is supplemented by the adhesive member 130, the seal will not be released even if the internal pressure of the battery cell 110 increases. On the other hand, the portion of the lower end 114a of the battery cell 110 to which the adhesive member 130 is not attached has a relatively low degree of sealing, and the seal can be released before the portion to which the adhesive member 130 is attached. As a result, the emission of exhaust gas can be guided to the portion of the lower end 114a of the battery cell 110 corresponding to the cell exhaust portion 300V (i.e., the portion without the adhesive member), and the exhaust gas can be discharged downward through the cell exhaust portion 300V.

[0119] Refer again Figure 6 , Figure 7 , Figure 8 , Figure 13 and Figure 14 In the battery cell stack 120 according to this embodiment, the battery cell 110 located therein can be fixed when adjacent cell frames 300 are connected to each other. The connection method between the cell frames 300 is not particularly limited, but connections due to physical constraints can be performed. For example, each cell frame 300 may include a hook-shaped protrusion 300P and a hook-shaped groove 300G. The hook-shaped protrusion 300P may protrude in the direction of another adjacent cell frame 300. The cell frames 300 can be connected to each other in such a way that the hook-shaped protrusion 300P of any cell frame 300 is hook-connected to the hook-shaped groove 300G in the adjacent cell frame 300. Figure 14 The diagram illustrates the state in which this hook-shaped connection is performed between two cell frames 300. All of the multiple cell frames 300 can be connected by successively performing the connection between the hook-shaped protrusion 300P and the hook-shaped groove 300G in each of the adjacent cell frames 300.

[0120] Each battery cell 110 is covered by a cell frame 300, and these cell frames 300 are interconnected to form a battery cell stack 120. In this way, the battery cell stack 120 including the cell frames 300 is structurally more stable, and the form of simply stacking the battery cells 110 together without the cell frames 300 can better resist external vibrations or shocks. When only the battery cells 110 are stacked together without the cell frames 300, there may be a problem that the battery cell stack cannot maintain its shape due to external vibrations or shocks and may collapse. Furthermore, in the case of the battery cell stack 120 including the cell frames 300, since they are assembled on a unit basis, they can be easily replaced on a unit basis. In other words, even after the battery cell stack 120 has been manufactured, there is an advantage that a particular battery cell 110 with a problem can be easily replaced by disassembling and reassembling the cell frame 300.

[0121] Next, the heat sink and pad components included in the battery assembly according to this embodiment will be described in detail.

[0122] Figure 15 and Figure 16 These are perspective and front views showing the radiator and pad components according to embodiments of the present disclosure. Figure 17 This is a front view showing the heatsink, padding components, and some of the battery cell frames. Specifically, Figure 17 The diagram shows four cell frames 300 inserted between the cooling plate 410 of the radiator 400 and the pad member 500. Figure 18 This is an exploded perspective view showing the battery cell, cooling plate, and pad assembly connected together to the cell frame.

[0123] Reference Figures 15 to 18 According to this embodiment, the battery assembly 100 may include a heat sink 400 having at least one cooling plate 410 disposed at least at one location between the battery cells 110. Coolant may flow within the cooling plate 410. Specifically, the cooling plate 410 has a coolant path, which is a space in which coolant flows, and may contact the battery cells 110.

[0124] Specifically, the battery cell 110 and the cooling plate 410 can be in surface contact with each other. At least one surface of the battery cell 110 can be in contact with the cooling plate 410. More specifically, one surface of the cooling plate 410 can be in contact with the cell body 113 of the battery cell 110 (see [link to relevant documentation]). Figure 10One surface of the battery cell 110 may be in contact with the cooling plate 410, or both surfaces of the battery cell 110 may be in contact with the cooling plate 410. That is, at least one surface of the battery cell 110 may be in direct contact with the surface of the cooling plate 410.

[0125] The cooling plate 410 has a plate-like shape and can provide surface cooling for the battery cell 110. The coolant flowing inside the cooling plate 410 can be cooling water. The battery assembly 100 according to this embodiment can have a water-cooled cooling structure.

[0126] Conventional battery assemblies have an edge cooling structure where a thermal resin layer contacts only the edge of the battery cell, and this thermal resin layer directly / indirectly contacts a heat sink to dissipate heat from the battery cell. On the other hand, the battery assembly 100 according to this embodiment can have a surface cooling structure, wherein a cooling plate 410 through which coolant flows is inserted between the battery cells 110 and simultaneously contacts the cell body 113 of the battery cell 110 (see [link to relevant documentation]). Figure 10 A surface contact. Due to the cell body 113 of the battery cell 110 (see...) Figure 10 One surface of the module can rest against one surface of the cooling plate 410, thus providing a much wider cooling area, which offers the advantage of superior cooling performance compared to conventional battery modules.

[0127] Recently, battery packs, as essential components, require fast charging, but one of the problems with fast charging is the heat generated during the process. For fast charging, a cooling system is essentially needed to manage the heat generated during the process to an appropriate level. When fast charging a battery pack with a conventional edge cooling structure, the temperature difference between the upper and lower parts increases, and in the case of insufficient cooling in the upper part, the fast charging efficiency will inevitably decrease. On the other hand, in the case of the battery pack 100 according to this embodiment, since the cooling plate 410 directly cools the surface of the battery cell 110 while in contact with the surface of the battery cell 110, it can provide sufficiently excellent cooling performance to control the heat generation during fast charging.

[0128] The number or size of the cooling plates 410 is not particularly limited, as long as they can provide surface cooling for the battery cells 110 in the battery assembly 100. The number of cooling plates 410 can be appropriately varied considering the size, capacity, and heat generation of the battery assembly 100. Furthermore, the area of ​​the cooling plates 410 is not particularly limited if they can cover 60% or more of the area of ​​one surface of the battery cell 110. However, multiple cooling plates 410 can be provided within the battery assembly 100, and preferably, the number of cooling plates 410 is ensured to the extent that one surface of all battery cells 110 can contact the cooling plates 410.

[0129] At the same time, refer to Figure 10 The portion of the sealing part 114s at the two ends 114c and 114d of the electrode lead 111 protruding from the battery cell 110 corresponds to the so-called stepped portion of the battery cell 110. This stepped portion is thinner than the cell body 113 of the battery cell 110. (Refer to again...) Figure 18 Because the stepped portion is relatively thin, a small gap may appear between the stepped portion of the battery cell 110 and the cooling plate 410. In order to fill the gap between the stepped portion of the battery cell 110 and the cooling plate 410, a spacer 700 can be further provided between the stepped portion of the battery cell 110 and the cooling plate 410.

[0130] At the same time, refer to again Figures 15 to 18 The battery assembly according to this embodiment may include at least one pad member 500 located at at least one position between the battery cells 110. The pad member 500 may be a foam member with thermal insulation properties. The material of the pad member 500 is not particularly limited, as long as the pad member 500 has thermal insulation properties and the specified elasticity. For example, the pad member 500 may include a silicone resin material or an aerogel material.

[0131] In one specific embodiment of this disclosure, the cooling plate 410 or the padding member 500 may be located between the battery cells 110. Specifically, in the battery cell stack 120, the battery cells 110 are stacked while being covered by the cell frame 300, and either the cooling plate 410 or the padding member 500 may be located between adjacent battery cells 110. More specifically, as Figures 15 to 17 As shown, along the X-axis (i.e., the direction in which the battery cells 110 are stacked), the cooling plate 410 and the pad member 500 can be arranged alternately. The battery cell 110 connected to the cell frame 300 can be inserted into the space S between the cooling plate 410 and the pad member 500 (see [reference]). Figure 16 ). Figure 17 The diagram shows each of the four cell frames 300 inserted between the cooling plate 410 and the pad member 500. Of course, in Figure 17 In the middle, the battery cell 110 is not visible because it is blocked by the cell frame 300, but the battery cell 110 is in a state located inside the cell frame 300.

[0132] As a result, Figure 18As shown, in any of the battery cells 110, one surface of the battery cell 110 may contact the cooling plate 410 of the heat sink 400, and one surface on the opposite side of the battery cell 110 may contact the pad member 500. However, this is merely an example; in another embodiment of this disclosure, the cooling plate 410 may also be located on both surfaces of the battery cell 110, with the pad member 500 in the case of the cooling plate 410. The heat propagation prevention function and expansion control function of the cooling plate 410 and the pad member 500 will be described later.

[0133] The structure of the heat sink according to this embodiment will be described in detail below.

[0134] Figure 19 This is a perspective view showing a heat sink according to an embodiment of the present disclosure. Figure 20 It is shown Figure 19 A perspective view of a cooling plate and cooling pipe in a radiator. Figure 21 It is shown Figure 19 A perspective view of one of the cooling plates included in the radiator. Figure 22 yes Figure 21 Exploded perspective view of the cooling plate. Figure 23 yes Figure 19 Front view of the radiator.

[0135] Reference Figures 19 to 23 According to this embodiment, the heat sink 400 may include a cooling plate 410 for surface cooling of the battery cell 110 and a cooling pipe 420 connected to the cooling plate 410.

[0136] First, the cooling plate 410 may include a first cooling cover 411, a second cooling cover 412, and a cooling center plate 413 located between the first cooling cover 411 and the second cooling cover 412. In the direction of stacking the battery cells 110, the first cooling cover 411, the cooling center plate 413, and the second cooling cover 412 may be positioned sequentially along the -X axis direction.

[0137] The cooling center plate 413 may be provided with a coolant path CP, which is the path through which the coolant flows. This coolant path CP is sealed between the first cooling cap 411 and the second cooling cap 412, thus completing the coolant flow path. As an example, Figure 22 This indicates that the coolant path CP is a tortuous path, but there are no particular restrictions on the width, shape, area, etc. of the coolant path CP, as long as the coolant can flow. As another example, the coolant path CP can be implemented using a single empty space. Considering the coolant flow rate, velocity, etc., the width, shape, area, etc. of the coolant path CP can be adjusted appropriately.

[0138] The cooling plate 410 may include an inlet 410N and an outlet 410U in communication with the coolant path CP. Each of the inlet 410N and outlet 410U of the cooling plate 410 may be connected to a cooling pipe 420. Specifically, the cooling pipe 420 may include a first cooling pipe 421 and a second cooling pipe 422, wherein the first cooling pipe 421 may be connected to the inlet 410N of the cooling plate 410, and the second cooling pipe 422 may be connected to the outlet 410U of the cooling plate 410.

[0139] The first cooling pipe 421 and the second cooling pipe 422 can be connected to a coolant circulation system (not shown) disposed inside or outside the battery pack. Coolant moving from the coolant circulation system along the first cooling pipe 421 can flow into the coolant path CP through the inlet 410N of the cooling plate 410 and flow inside the cooling plate 410. Subsequently, coolant discharged from the coolant path CP through the outlet 410U of the cooling plate 410 can flow along the second cooling pipe 422 and then be collected again in the coolant circulation system. Through the above process, a coolant circulation structure can be realized within the battery assembly 100. The heat generated by the battery cells 110 inside the battery assembly 100 can be transferred to the coolant flowing into the coolant path CP of the cooling plate 410 and discharged to the outside of the battery assembly 100 along the second cooling pipe 422. Subsequently, the coolant, which has been cooled again in the coolant circulation system, can flow back into the coolant path CP of the cooling plate 410 via the first cooling pipe 421. That is, the battery assembly 100 according to this embodiment may have a structure that dissipates the heat generated from the battery cell 110 via a coolant flowing along the heat sink 400.

[0140] At the same time, such as Figure 23 As shown, a chamfered portion 410CH can be provided at one end of the cooling plate 410. The chamfered portion 410CH can be a portion whose thickness gradually narrows towards the outside of the cooling plate 410 at one end.

[0141] In a battery cell stack 120 formed by stacking battery cells 110 onto a cell frame 300 in one direction, a cooling plate 410 can be inserted into the gaps between the battery cells 110. Because a chamfered portion 410CH is provided at one end of the cooling plate 410, the cooling plate 410 can be easily inserted between the battery cells 110 when it is assembled into the battery cell stack 120. The cooling plate 410 can be pushed in starting from the chamfered portion 410CH while maintaining close contact between the battery cells 110.

[0142] Refer again Figures 5 to 9The battery assembly 100 may further include a busbar 610 and a terminal busbar 620 connected to the electrode leads 111 of the battery cell 110. The busbar 610 and the terminal busbar 620 may be electrically connected to the electrode leads 111 of the battery cell 110. As an example, the busbar 610 and the terminal busbar 620 may be joined to the electrode leads 111 by welding. The busbar 610 and the terminal busbar 620 may be arranged on two surfaces of the battery cell stack 120 not covered by the cell assembly frame 200 (the surface along the Y-axis and the surface along the -Y-axis).

[0143] The battery cell 110 can be connected in series or in parallel via the busbar 610.

[0144] The terminal busbar 620 can be electrically connected to the electrode leads 111 of some battery cells 110, and a portion thereof can be exposed to the outside of the battery assembly 100. The battery assembly 100 can form an HV (high voltage) connection with other battery assemblies or electrical components through the terminal busbar 620. Here, an HV connection is used as a power source to provide power that requires high voltage, and refers to a connection between battery cells or between battery assemblies.

[0145] Meanwhile, although not specifically shown in the figure, the battery assembly 100 may include a connector. The connector (not shown) is a component for an LV (low voltage) connection of the battery assembly (100). An LV connection refers to an electrical connection that requires a relatively low voltage, such as a battery electrical component. As an example, a sensing component (not shown) can sense voltage or temperature data of the battery cells 110 inside the battery assembly 100, and the connector connected to the sensing component can transmit the sensed voltage or temperature data to a BMS (battery management system) located outside the battery assembly 100. Therefore, a portion of the connector may also be exposed to the outside of the battery assembly 100.

[0146] The functions of the cell frame 300, the cooling plate 410 of the radiator 400, the pad member 500, etc. in the battery assembly 100 according to this embodiment will be described in more detail below.

[0147] Refer to together Figures 8 to 22Since the cell frame 300 according to this embodiment extends along and covers the edge of each of the battery cells 110, one surface of the cell body 113 of the battery cell 110 is exposed and not obstructed by the cell frame 300. The cell frame 300 can stably fix the battery cell 110 and simultaneously guide one surface of the cell body 113 of the battery cell 110 into contact with the cooling plate 410 of the heat sink 400. That is, surface cooling of the battery cell 110 in the battery cell stack 120 can be achieved by the cell frame 300 and the cooling plate 410. Therefore, the battery assembly 100 according to this embodiment can have excellent cooling performance to sufficiently control heat generation during fast charging.

[0148] One surface of the cell body 113 of the battery cell 110 is in close contact with the cooling plate 410 or the pad member 500. Therefore, even if a thermal event or thermal runaway occurs in the battery cell 110, it is difficult for heat propagation and exhaust gas emission to occur in the surface direction (i.e., in the X-axis or -X-axis direction, which is the direction in which the battery cells 110 are stacked). Therefore, high-temperature exhaust gas or particles caused by thermal runaway of the battery cell 110 are very likely to be emitted through the lower end 114a, the upper end 114b, or both ends 114c and 114d of the battery cell 110. When the seals at the lower end 114a and the two ends 114c and 114d where the sealing portions 114s are provided are released, high-temperature exhaust gas or particles are very likely to be emitted. Specifically, the portion of the sealing part 114s at the two ends 114c, 114d of the battery cell 110 where the electrode lead 111 protrudes is called the stepped portion. However, in conventional battery modules, the seal is mainly released at this stepped portion, and the exhaust gas is thus released.

[0149] However, according to this embodiment, the first frame 310, second frame 320, third frame 330, and fourth frame 340 of the cell frame 300 are in close contact with the lower end 114a, upper end 114b, and two ends 114c and 114d of the battery cell, respectively, thereby restricting the discharge of exhaust gases or particles through the edge of the battery cell 110. Conversely, in the cell frame 300 according to this embodiment, the portion corresponding to the lower end 114a of the battery cell (i.e., the first frame 310) is provided with a cell exhaust section 300V that opens in the downward direction, thereby guiding the high-temperature exhaust gases, particles, etc. generated during the thermal runaway of the battery cell 110 to be discharged only through the cell exhaust section 300V. That is, in the battery assembly 100 according to this embodiment, downward directional exhaust (i.e., "bottom exhaust") can be guided by the cell frame 300 provided with the cell exhaust section 300V. Furthermore, as mentioned above, by attaching the adhesive member 130 to the lower end 114a of the battery cell 110, except for the portion corresponding to the cell exhaust portion 300V, it is possible to more clearly achieve exhaust only to the cell exhaust portion 300V.

[0150] Meanwhile, although described later, with the battery assembly 100 stored in the battery pack frame, exhaust gases or particles emitted from the cell exhaust section 300V can be discharged to the outside of the battery pack frame via the interior of the bottom frame of the battery pack frame. (See below for further details.) Figures 30 to 40 This will be described in detail.

[0151] High-voltage current paths exist within the battery assembly 100, such as HV (high-voltage) connections of busbar 610 or terminal busbar 620. Here, an HV connection is used as a power source to provide electricity requiring high voltage, and refers to connections between battery cells or between battery assemblies. In this case, if high-temperature gases, particles, etc., resulting from a thermal event in the battery cell 110 come into contact with high-voltage paths such as HV connections, a short circuit or arc discharge that could potentially cause additional explosions and flames may occur. Specifically, the stepped section is adjacent to the electrode leads 111, busbar 610, etc., and exhaust gases emitted through the stepped section may be more dangerous because they directly affect the HV connections. On the other hand, in the case of the battery pack according to this embodiment, since the battery pack has a "bottom exhaust" structure with a 300V exhaust section through the cell as described above, high-temperature gases or particles generated due to thermal events can be discharged in a downward direction. Specifically, although described later, high-temperature gases or particles can be discharged to the outside through the bottom frame of the battery pack frame. Therefore, there is no possibility that high-temperature gases or particles could come into contact with high-pressure paths such as HV connections, which ultimately improves the safety of preventing thermal runaway.

[0152] Meanwhile, as previously mentioned, since one surface of the cell body 113 of the battery cell 110 is in close contact with the cooling plate 410 or the pad member 500, the cooling plate 410 and the pad member 500 can minimize the thermal runaway phenomenon generated in the battery cell 110 and its thermal propagation to adjacent battery cells 110. That is, the cooling plate 410 can achieve excellent cooling performance sufficient to control heat generation during fast charging through a surface cooling structure, while preventing thermal propagation between battery cells 110. In particular, the cooling plate 410 is configured to allow coolant to flow internally, which can lower the thermal runaway temperature of the battery cell 110 and block lateral movement, thereby effectively preventing thermal propagation between battery cells 110. Similarly, the pad member 500 can also prevent thermal propagation between battery cells 110. If the pad member 500 contains a material with excellent thermal insulation properties, it can prevent heat propagation even more effectively.

[0153] Meanwhile, during repeated charging and discharging of the battery cell 110, the internal electrolyte may decompose and generate gas, causing the battery cell 110 to expand, i.e., an expansion phenomenon. In this expansion phenomenon, the battery cell 110 expands in the thickness direction. That is, the battery cell 110 can expand along the direction of its stacking (parallel to the X-axis). The pad member 500 according to this embodiment can control the expansion while absorbing it. This prevents the battery assembly 100 from deforming beyond its deformation limit due to the expansion of the battery cell 110. The cooling plate 410, which is in contact with the other surface of the battery cell 110, can also absorb the expansion of the battery cell 110 to a certain extent.

[0154] The exhaust plate and exhaust cover according to embodiments of the present invention will now be described in detail.

[0155] Figure 24 This is a perspective view showing the battery cell stack and lower frame connected together when viewed from below. Figure 25 This is a perspective view of the battery cell stack when viewed from below. Figure 26 It shows along Figure 6 A cross-sectional perspective view of the appearance cut by the cutting line AA. Figure 27 yes Figure 26 A magnified view of part "B". Figure 28 This is an exploded perspective view showing the lower frame according to an embodiment of the present disclosure. Figure 29 (a) and (b) are perspective views and cross-sectional perspective views, respectively, showing an exhaust plate according to an embodiment of the present disclosure. Specifically, Figure 29 (b) shows along Figure 29 The appearance of the cut line CC in (a).

[0156] Reference Figure 5 , Figure 6 and Figures 24 to 29 As described above, the battery assembly 100 according to this embodiment may include a cell assembly frame 200 for accommodating battery cells 110, wherein the cell assembly frame 200 may include: an upper frame 210 covering the upper part of the battery cells 110; and a lower frame 220 covering the lower part of the battery cells 110.

[0157] The vent cover 220VC, which opens under a specified pressure or higher, can be located below the cell vent 300V. As an example, the vent cover 220VC, which opens under a specified pressure or higher, can be formed on the lower frame 220. As an example, the lower frame 220 may include a first lower cover 221, a second lower cover 222, and a vent plate 223 located between the first lower cover 211 and the second lower cover 222.

[0158] The first lower cover 221, the vent plate 223, and the second lower cover 222 can be arranged sequentially along the direction from one end 114d of the battery cell 110 to the other end 114c. That is, the vent plate 223 can be located at a position corresponding to the cell venting section 300V of the cell frame 300, and an vent cover 220VC can be provided on the vent plate 223.

[0159] The vent cover 220VC can cover the cell vent 300V of the cell frame 300. Specifically, the vent cover 220VC can cover the lower part of the cell vent 300V of the cell frame 300. The vent plate 223 including the vent cover 220VC can include a refractory material. As an example, the vent plate 223 can include mica (MICA) material.

[0160] The vent cover 220VC can be designed to open when a specified pressure or higher is applied by the exhaust gas discharged through the cell vent 300V. There are no particular limitations on the structure of the vent cover 220VC if it performs this function, nor are there any particular limitations on the standard pressure required to open it. The standard pressure required to open it may vary depending on the number, size, and components of the battery cells included in the battery assembly.

[0161] As an example, the vent cover portion 220VC according to this embodiment may include a connecting portion 220C as a part connected to the vent plate 223, and slits 220S with perforated shapes may be formed on the remaining three sides excluding the connecting portion 220C. That is, slits 220S are formed on the remaining three sides of the vent plate 223 excluding the connecting portion 220C, so that the vent cover portion 220VC can be provided on the vent plate 233. The number of vent cover portions 220VC provided on the vent plate 223 is not particularly limited, but as an example, the number of vent cover portions 220VC may be the same as the number of cell vent portions 300V in the battery cell stack 120, and each of the vent cover portions 220VC may correspond one-to-one with each of the cell vent portions 300V.

[0162] Under normal circumstances, the vent cover 220VC covers the lower part of the cell vent 300V. However, when exhaust gas is discharged from the battery cell 110 and a specified pressure or higher is applied to the vent cover 220VC, the vent cover 220VC can open while bending in the opposite direction to the direction of the cell vent 300V. Thus, the exhaust gas generated in the battery cell can be discharged through the cell vent 300V and the vent cover 220VC.

[0163] Meanwhile, the lower frame 220 may include an adhesive portion 224 for joining the vent plate 223 and the battery cell laminate 120. This adhesive portion 224 may extend along the edge of the vent plate 223. More specifically, the adhesive portion 224 may be provided at the edge of the vent plate 223, and the vent plate 223 may be attached to the lower end of the cell frame 300, i.e., the first frame 310 of the cell frame 300, via the adhesive portion 224. Because the adhesive portion 224 is attached to the edge of the vent plate 223, leakage of exhaust gas or particles from the cell vent portion 300V to portions other than the vent cap portion 220VC can be prevented.

[0164] In addition, refer to Figure 13 , Figure 15 , Figure 18 , Figure 19 and Figure 27 According to this embodiment, the cooling plate 410 may include a protruding cooling plate protrusion 410P to correspond to the cell exhaust portion 300V of the cell frame 300. The cooling plate protrusion 410P may protrude downward so as to face the cell exhaust portion 300V at the lower side of the cooling plate 410.

[0165] Furthermore, the pad member 500 may include a protruding pad member protrusion 500P to correspond to the cell venting portion 300V of the cell frame 300. The pad member protrusion 500P may protrude downwards to face the cell venting portion 300V from the lower side of the pad member 500.

[0166] like Figure 13 As shown, the cell exhaust section 300V may include a first section 300V1, a second section 300V2 and a third section 300V3, wherein the section facing the third section 300V3 can be opened without any other components.

[0167] In this case, the cooling plate 410 or the pad member 500 can be located between the battery cells 110, and the cooling plate protrusion 410P or the pad member protrusion 500P can be located on the portion of the third part 300V3 facing the cell exhaust portion 300V.

[0168] Specifically, such as Figure 27 As shown, the pad member protrusion 500P can be located on the opposite side of the third part 300V3 of a cell exhaust 300V, and the cooling plate protrusion 410P can be located on the opposite side of the third part 300V3 of another adjacent cell exhaust 300V.

[0169] When the first part 300V1 and the second part 300V2 of the cell exhaust section 300V come into contact with either the cooling plate protrusion 410P or the pad member protrusion 500P, a path for exhaust can be formed in the cell exhaust section 300V. That is, the space surrounded by the first part 300V1, the second part 300V2, the third part 300V3 and the cooling plate protrusion 410P or the pad member protrusion 500P can become the exhaust path VP through which the exhaust gas passes (see...). Figure 27 Furthermore, the lower part of the exhaust path VP can be blocked by the exhaust cover portion 220VC of the exhaust plate 223. Under normal circumstances, the exhaust path VP is blocked by the exhaust cover portion 220VC; however, when a specified pressure or higher is applied to the exhaust cover portion 220VC, the exhaust path VP can open as the exhaust cover portion 220VC is bent downwards. The exhaust gas generated from the battery cell 110 can be discharged downwards through the exhaust path VP of the cell exhaust section 300V.

[0170] At the same time, refer to again Figure 5The upper frame 210 of the cell assembly frame 200 may include a side surface portion 211 and a top plate portion 212 covering the battery cell stack 120. This upper frame 210 protects the battery cell stack 120 and also controls the expansion of the battery cells 110. Furthermore, although the cell vent 300V is located within the cell frame 300, leakage of exhaust gas may occur to other parts between the cell frames 300; however, the upper frame 210 prevents the leaked exhaust gas from diffusing to the outside of the battery assembly 100.

[0171] Refer again Figures 1 to 3 The bottom frame 1200 on which the battery assembly 100 is placed is provided with an exhaust space. The exhaust space will be described in more detail with reference to other accompanying drawings. Figure 1 and Figure 2 The battery pack 1000 is shown with six battery components 100 placed on the bottom frame 1200.

[0172] The battery pack frame 1100 may include side surface frames 1300 extending along the edge of the bottom frame 1200. As an example, the side surface frames 1300 may include a first side surface frame 1310, a second side surface frame 1320, a third side surface frame 1330, and a fourth side surface frame 1340. The first side surface frame 1310, the second side surface frame 1320, the third side surface frame 1330, and the fourth side surface frame 1340 may be arranged along the four sides of the bottom frame 1200, which has a square shape. A storage space with an open upper portion is provided by the bottom frame 1200 and the side surface frames 1300, in which the battery assembly 100 may be arranged. After the battery assembly 100 is arranged in the storage space, the open upper portion of the storage space may be covered by a battery pack cover 1400. The battery pack cover 1400 may be joined to the side surface frames 1300 of the battery pack frame 1100, and as an example, a welded joint or an adhesive joint may be applied. The battery assembly 100 can be sealed by the battery pack frame 1100 and the battery pack cover 1400. In addition, a gasket for improving sealing performance can be inserted between the battery pack cover 1400 and the side surface frame 1300.

[0173] Meanwhile, the battery pack 1000 according to this embodiment may include a mounting beam 1300M disposed on the side surface frame 1300 to fix the battery pack 1000. As an example, Figures 1 to 3 The image shows a mounting beam 1300M formed on the side surface frame 1300. The mounting beam 1300M can be used when the battery pack 1000 is mounted on the device. As an example, when the battery pack 1000 is mounted on a vehicle device, the mounting beam 1300M can be secured to the vehicle chassis.

[0174] Furthermore, the battery pack 1000 according to this embodiment may include a vertical beam 1800 located on the bottom frame 1200 and separating the spaces where the battery cells 110 are located. As an example, Figure 2 and Figure 3 Three vertical beams 1800 are shown dividing the storage space, which holds six battery modules 100, into three zones.

[0175] Figure 30 This is a perspective view showing a battery pack frame and battery assembly according to an embodiment of the present disclosure. Figure 31 It shows along Figure 30 A cross-sectional view of the cross section cut by the cutting line DD. Figure 32 yes Figure 31 A magnified view of a portion of the letter "E". Figure 33 This is a perspective view showing the bottom frame according to an embodiment of the present disclosure. Figure 34 This shows that the exhaust plate is arranged in Figure 33 A perspective view of the state within the bottom frame. That is, the illustration of other parts of the battery assembly is omitted, and... Figure 34 The image only shows the state in which the battery assembly's exhaust plate 223 is arranged on the bottom frame 1200.

[0176] Reference Figure 24 , Figure 25 and Figures 30 to 34 The bottom frame 1200 is provided with an exhaust space VS through which exhaust gases, particles, etc., discharged from the cell exhaust section 300V move. The cell exhaust section 300V of the cell frame 300 can be positioned correspondingly to the exhaust space VS of the bottom frame 1200. Specifically, the cell exhaust section 300V of the cell frame 300 can communicate with the exhaust space VS of the bottom frame 1200. More specifically, when exhaust gases are discharged from the battery cell 110 due to thermal runaway, the cell exhaust section 300V can communicate with the exhaust space VS of the bottom frame 1200. Thus, the exhaust gases can move from the cell exhaust section 300V to the exhaust space VS of the bottom frame 1200.

[0177] Because the cell exhaust section 300V covers the lower part of the cell exhaust section 300V of the cell frame 300, the cell exhaust section 300V and the exhaust space VS of the bottom frame 1200 may be in a state of non-communication between each other under normal circumstances. However, after the exhaust cover 220VC is opened due to the exhaust gas discharged through the cell exhaust section 300V, the exhaust gas can move from the cell exhaust section 300V to the exhaust space VS of the bottom frame 1200, and at the same time the cell exhaust section 300V and the exhaust space VS of the bottom frame 1200 are connected to each other.

[0178] The cell exhaust portion 300V can be configured to protrude in the direction of the bottom frame 1200 and insert into the exhaust space VS inside the bottom frame 1200. Furthermore, the portion forming the exhaust cover portion 220VC can be configured to protrude in the direction of the bottom frame 1200 and insert into the exhaust space VS inside the bottom frame 1200. This prevents the exhaust gas VG from leaking to other locations when the exhaust cover portion 220VC is opened, thereby guiding all exhaust gas VG to move into the exhaust space VS of the bottom frame 1200.

[0179] High-temperature exhaust gases and particles flowing into the exhaust space VS can be discharged to the outside of the battery pack 1000. The exhaust gases and particles can flow along the exhaust space VS provided inside the bottom frame 1200 and are eventually discharged to the outside of the battery pack 1000. The battery pack 1000 according to this embodiment has a so-called "bottom exhaust" structure that uses the bottom frame 1200 to discharge high-temperature exhaust gases, particles, etc., to the outside. If high-temperature gases, particles, etc., caused by a thermal event in the battery cell 110 come into contact with a high-voltage path such as an HV connection, a short circuit or arc discharge that could potentially cause additional explosions and flames may occur. On the other hand, in the case of the battery pack 1000 according to this embodiment, since the battery pack has the "bottom exhaust" structure described above, high-temperature gases or particles generated due to a thermal event can be discharged in a downward direction (i.e., towards the bottom frame 1200). Therefore, there is no risk that high-temperature gases, particles, etc., may come into contact with high-voltage paths such as HV connections, ultimately improving safety against thermal runaway.

[0180] As an example, the detailed structure of the bottom frame 1200 will be described in detail below.

[0181] Figure 35 This is a perspective view showing the inner frame and cover plate according to an embodiment of the present disclosure. Figure 36 yes Figure 35 A magnified view of a portion of the "F".

[0182] Refer to together Figures 30 to 36 According to embodiments of the present disclosure, the bottom frame 1200 may include an outer frame 1210 and an inner frame 1220. As an example of the present disclosure, the exhaust space VS may be provided by the outer frame 1210 and the inner frame 1220 of the bottom frame 1200. The outer frame 1210 may be a plate located at the lowest end of the battery pack 1000, and the outer frame 1210 may be connected to the side surface frame 1300. The outer frame 1210 may be located below the inner frame 1220. The battery assembly 100 may be placed on the inner frame 1220.

[0183] According to this embodiment, multiple exhaust spaces VS can be configured. The exhaust gas generated in the battery cell 110 can sequentially pass through multiple exhaust spaces VS. As the exhaust gas flows sequentially through multiple exhaust spaces VS, the temperature of the exhaust gas and the particles it contains can be reduced, and the particles contained in the exhaust gas can be filtered out. Ultimately, this prevents the exhaust gas and particles from causing an explosion inside the battery pack 1000.

[0184] According to embodiments of the present disclosure, the exhaust space VS may include a first exhaust space VS1 and a second exhaust space VS2. The first exhaust space VS1 and the second exhaust space VS2 may be separated by a portion of an inner frame 1220 having filter holes 1220H.

[0185] There are no particular restrictions on the position and arrangement of the first exhaust space VS1 and the second exhaust space VS2 within the bottom frame 1200. For example, the first exhaust space VS1 and the second exhaust space VS2 can be arranged along a direction parallel to one surface of the bottom frame 1200. The first exhaust space VS1 and the second exhaust space VS2 can also be arranged along a direction parallel to one surface of the outer frame 1210 within the bottom frame 1200. Figures 30 to 36 An example is shown where the first exhaust space VS1 and the second exhaust space VS2 are arranged along a direction parallel to the Y-axis. Although not specifically shown in the figure, as another example, the first and second exhaust spaces can be arranged along a direction perpendicular to a surface of the bottom frame 1200. That is, the first and second exhaust spaces can be arranged in a layered structure along a height direction perpendicular to a surface of the bottom frame 1200, and the exhaust gas can move sequentially through the layered structure of the first and second exhaust spaces.

[0186] The inner frame 1220 is a plate-like member, but may include recesses 1221 and protrusions 1222. In the inner frame 1220, the recesses 1221 and protrusions 1222 may be arranged alternately along the Y-axis. Meanwhile, to form the exhaust space VS, a cover plate 1500 or the like may be attached to two side surfaces of the inner frame 1220. The inner frame 1220 and the cover plate 1500 may be joined by methods such as welding.

[0187] As an example of this disclosure, the exhaust space VS may include a first exhaust space VS1 disposed in the recess 1221 and a second exhaust space VS2 disposed in the protrusion 1222. The first exhaust space VS1 and the second exhaust space VS2 can be implemented by the recess 1221 and the protrusion 1222 of the inner frame 1220. For example, the portion of the recess 1221 of the inner frame 1220 surrounded by the cover plate 1500 and the exhaust plate 223 of the battery assembly 100 can correspond to the first exhaust space VS1. That is, when the exhaust cover 220VC is opened, the exhaust gas discharged from the cell exhaust section 300V can move to the first exhaust space VS1.

[0188] Furthermore, the portion of the inner frame 1220 whose protrusion 1222 is surrounded by the cover plate 1500 may correspond to the second exhaust space. Additionally, the inner frame 1220 may include filter holes 1220H communicating with the first exhaust space VS1 and the second exhaust space VS2. The number of filter holes 1220H may be multiple. For example... Figure 32 and Figure 36 As shown, the exhaust gas VG flowing into the first exhaust space VS1 can move to the second exhaust space VS2 through the filter hole 1220H. Particulate matter, ash, byproducts, etc., contained in the high-temperature exhaust gas VG can be initially filtered out when passing through the filter hole 1220H. That is, in the case of the bottom frame 1200 according to this embodiment, the exhaust space VS is divided into the first exhaust space VS1 and the second exhaust space VS2, and the first exhaust space VS1 and the second exhaust space VS2 are connected through the filter hole 1220H, thereby exhibiting the function of initially filtering the high-temperature exhaust gas VG.

[0189] As described above, the cell exhaust portion 300V and the exhaust cover portion 220VC can each be configured to protrude in the direction of the bottom frame 1200 and be inserted into the exhaust space VS within the bottom frame 1200. In particular, the cell exhaust portion 300V and the exhaust cover portion 220VC can be configured to be inserted into the first exhaust space VS1.

[0190] Simultaneously, a gas shield 1600 can be arranged in the recess 1221 of the inner frame 1220. Specifically, in adjacent battery packs 100 along the X-axis direction, the gas shield 1600 can be arranged in the recess 1221 to separate the first exhaust space VS1 located below one battery pack 100 from the first exhaust space VS1 located below another battery pack 100. According to this gas shield 1600, exhaust gas emitted from any battery pack 100 to the first exhaust space VS1 can be prevented from moving to the first exhaust space VS1 located below the adjacent battery pack 100 and then flowing back. That is, the gas shield 1600 according to this embodiment can correspond to a component that independently separates the first exhaust spaces VSD, such that each battery pack 100 has an independent first exhaust space VS1. Finally, since the first exhaust spaces VS1 are separated to correspond to each of the battery packs 100, the propagation of thermal runaway between the battery packs 100 is minimized, and the explosion and structural collapse of the battery pack can be prevented. The gas shield 1600 can be located at a position corresponding to the aforementioned vertical beam 1800.

[0191] Figure 37 This is a perspective view showing a portion of the inner frame removed from the bottom frame according to an embodiment of the present disclosure. Figure 38 This is a perspective view showing the outer frame and wiring board according to an embodiment of the present disclosure. Figure 39 (a) is a partial view showing the holes in the outer frame. Figure 39 (b) is a partial view showing the state of the exhaust device connected to the outer frame hole. Figure 40 This is a plan view showing the bottom frame with the entire inner frame removed according to an embodiment of the present disclosure. Specifically, apart from the inner frame in the bottom frame, Figure 40 The outer frame 1210, wiring board 1700 and exhaust plate 223 are shown.

[0192] Refer to together Figure 31 , Figure 32 and Figures 37 to 40A multi-bend exhaust flow path can be formed inside the protrusion 1222. Furthermore, the battery pack 1000 may include an exhaust device 1900 disposed in the battery pack frame 1100. The exhaust device 1900 may be disposed inside the protrusion 1222. The exhaust device 1900 may be located on the lower surface of the bottom frame 1200. The exhaust device 1900 may be located on the lower surface of the outer frame 1210. The exhaust gas VG flowing along the exhaust space VS can ultimately be discharged to the outside of the battery pack 1000 through the exhaust device 1900. As an example, the outer frame 1210 may be formed with an outer frame hole 1210H, and the exhaust device 1900 may be mounted on such an outer frame hole 1210H. The exhaust device 1900 is generally referred to as a component or mechanism for discharging exhaust gases, etc. As an example, the exhaust device 1900 may be a valve structure that opens or ruptures under a specified internal pressure or higher.

[0193] The exhaust device 1900 can be located on the lower surface of the bottom frame 1200. Because the exhaust device 1900 is located on the lower surface of the bottom frame 1200, exhaust gases can be discharged in the downward direction of the battery pack 1000. The battery pack 1000 according to this embodiment can be mounted on a vehicle; however, as described above, the exhaust device 1900 is located on the lower surface of the bottom frame 1200, allowing exhaust gases to be discharged in the downward direction without affecting the vehicle driver or vehicle components. Therefore, it is possible to prevent exhaust gases from causing additional heat events in the vehicle.

[0194] The exhaust gas discharged from the battery cell 110 can move through the cell exhaust section 300V of the cell frame 300 to the exhaust space VS of the bottom frame 1200. For example, the exhaust gas discharged from the battery cell 110 can pass through the cell exhaust section 300V and the exhaust plate 223 and move to the first exhaust space VS1. The exhaust gas VG flowing into the first exhaust space VS1 can move to the second exhaust space VS2 through the filter hole 1220H of the inner frame 1220. The exhaust gas that has moved to the second exhaust space VS2 can be discharged to the outside of the battery pack 1000 through the exhaust device 1900 provided in the second exhaust space VS2.

[0195] For example, in the second exhaust space VS2, which is the internal space of the protrusion 1222, the exhaust gas VG can flow along an exhaust path with multiple bends and then be discharged through the exhaust device 1900. There are no particular limitations on the structure used to achieve the multiple bends in the exhaust path. When the exhaust gas VG flows along the exhaust path that extends while being bends multiple times, the temperature of the exhaust gas VG or particles can be reduced. Therefore, it is possible to prevent the exhaust gas VG or particles from causing an explosion.

[0196] Next, an exemplary structure for forming a multi-bend exhaust flow path will be described.

[0197] The wiring board 1700 can be located within the protrusion 1222 of the inner frame 1220, i.e., in the second exhaust space VS2. The wiring board 1700 can have a structure that has an internal space and extends in one direction (parallel to the X-axis). The outer frame hole 1210H and the exhaust device 1900 can be located in the internal space of the wiring board 1700.

[0198] The exhaust gas discharged from the battery cell 110 can move to the exhaust space VS of the bottom frame 1200 through the cell exhaust section 300V of the cell frame 300. For example, the exhaust gas discharged from the battery cell 110 can move to the first exhaust space VS1 through the cell exhaust section 300V and the exhaust plate 223. The exhaust gas VG flowing into the first exhaust space VS1 through the exhaust plate 223 can flow into the second exhaust space VS2 through the filter hole 1220H. The exhaust gas VG flowing into the second exhaust space VS2 through the filter hole 1220H can move from the external space of the wiring board 1700 in the second exhaust space VS2 to the internal space of the wiring board 1700 in the second exhaust space VS2. For example, as Figure 37 and Figure 40 As shown, the exhaust gas VG can bend multiple times as it moves into the internal space of the wiring board 1700.

[0199] Because the wiring board 1700 is positioned inside the second exhaust space VS2 in this manner, the exhaust gas VG and particles flowing into the second exhaust space VS2 move along the extended exhaust flow path, and this path bends multiple times. As the exhaust gas VG flows along the extended path provided by the wiring board 1700, the temperature of the exhaust gas VG or particles can be reduced. Therefore, it is possible to prevent the exhaust gas VG or particles from causing an explosion. Furthermore, as the path of the exhaust gas VG becomes longer, it is possible to prevent oxygen flowing in from outside the battery pack 1000 from encountering the exhaust gas, thereby preventing an explosion. In addition, large particles can be filtered out in the extended path.

[0200] Meanwhile, the external space of the wiring plate 1700 in the second exhaust space VS2 can be connected to each other. For example, the height of the wiring plate 1700 can be lower than the height of the protrusion 1222 of the inner frame 1220. Thus, the two areas of the second exhaust space VS2 located on both sides of the wiring plate 1700 can be connected to each other.

[0201] Figure 41 This is a partial cross-sectional view showing a portion of the cross-section of a battery pack according to a modified embodiment of the present disclosure.

[0202] Reference Figure 41The side surface frame 1300 may be provided with a side exhaust space VS3 communicating with the exhaust space VS. The exhaust gas VG flowing into the exhaust space VS of the bottom frame 1200 can flow along the exhaust space VS, move to the side exhaust space VS3 within the side surface frame 1300, and finally be discharged to the outside of the battery pack 1000. The side exhaust space VS3 may be located inside the side surface frame 1300 of the battery pack frame 1100, and the side exhaust space VS3 may communicate with the exhaust space VS of the bottom frame 1200.

[0203] Furthermore, an exhaust device 1900 can be provided on the outer surface of the side surface frame 1300, and the exhaust device 1900 can be connected to the side exhaust space VS3. Thus, the exhaust gas VG of the side exhaust space VS3 can be discharged to the outside of the battery pack through the exhaust device 1900.

[0204] For example, the exhaust space VS of the bottom frame 1200 may include a first exhaust space VS1 and a second exhaust space VS2. Since the first exhaust space VS1 and the second exhaust space VS2 overlap with the above description, the description of the first exhaust space VS1 and the second exhaust space VS2 will be omitted. The second exhaust space VS2 may communicate with the side exhaust space VS3 within the side surface frame 1300. If necessary, the battery pack frame 1100 may be provided with a connecting exhaust space VS4 that connects the exhaust space VS of the bottom frame 1200 and the side exhaust space VS3 of the side surface frame 1300. The connecting exhaust space VS4 may communicate with the second exhaust space VS2.

[0205] As an example, the exhaust gas VG discharged from the battery cell 110 can move through the cell exhaust section 300V of the cell frame 300 to the exhaust space VS of the bottom frame 1200. For example, the exhaust gas VG discharged from the battery cell 110 can move through the cell exhaust section 300V to the first exhaust space VS1. The exhaust gas VG flowing into the first exhaust space VS1 can flow into the second exhaust space VS2 through the filter hole 1220H (see...). Figure 36 The exhaust gas VG flowing into the second exhaust space VS2 can move to the side exhaust space VS3 within the side surface frame 1300. As described above, the exhaust gas VG can move to the side exhaust space VS3 via the connecting exhaust space VS4, which can be configured as needed. The exhaust gas VG flowing into the side exhaust space VS3 can be discharged to the outside of the battery pack via the exhaust device 1900.

[0206] In this embodiment, terms indicating direction such as front, back, left, right, top, and bottom have been used, but the terms used are provided only for ease of description and may vary depending on the position of the object, the position of the observer, etc.

[0207] According to the above embodiment, one or more battery components can be installed together with various control and protection systems such as a battery management system (BMS), a battery disconnect unit (BDU), and a cooling system to form a battery pack.

[0208] Battery components or battery packs can be used in a variety of devices. Specifically, battery packs can be used in vehicles such as electric bicycles, electric vehicles, and hybrid electric vehicles, or in ESS (energy storage systems), and can be used in a variety of devices that can use secondary batteries, but are not limited to these.

[0209] Although the invention has been described in detail with reference to its preferred embodiments, the scope of this disclosure is not limited thereto, and those skilled in the art can make various modifications and improvements using the basic concepts of this disclosure as defined in the appended claims, which are also within the scope of this disclosure.

[0210] Explanation of reference numerals in the attached figures

[0211] 100: Battery Components

[0212] 110: Battery Cells

[0213] 200: Cell assembly frame

[0214] 300: Cell frame

[0215] 300V: Cell exhaust section

[0216] 400: Radiator

[0217] 410: Cooling plate

[0218] 500: Pad component

[0219] 1000: Battery pack

[0220] 1100: Battery pack frame

[0221] 1200: Bottom frame

[0222] 1300: Side Surface Frame

[0223] 1400: Battery pack cover

Claims

1. A battery pack, the battery pack comprising: At least one battery assembly, the at least one battery assembly comprising a plurality of battery cells; as well as A battery pack frame that stores the at least one battery component. The battery pack frame includes a bottom frame, on which the battery assembly is placed, and a venting space is provided within the bottom frame. The battery assembly includes battery cells stacked in one direction, and a cell frame extending along and covering the edges of the battery cells. A cell vent is formed in the portion of the cell frame facing the bottom frame.

2. The battery pack according to claim 1, wherein, The cell exhaust section is positioned to correspond to the exhaust space.

3. The battery pack according to claim 1, wherein, The cell frame includes: a first frame covering the lower end of the battery cell; a second frame covering the upper end of the battery cell; and a third frame and a fourth frame covering the two ends of the battery cell between the lower end and the upper end, respectively. The cell exhaust section is formed in the first frame.

4. The battery pack according to claim 1, wherein, The cell frame is provided for each of the battery cells, such that the battery cells and the cell frames correspond one-to-one with each other.

5. The battery pack according to claim 1, wherein, During the discharge of exhaust gas from the battery cell, the cell exhaust section is in communication with the exhaust space of the bottom frame.

6. The battery pack according to claim 1, wherein, The cell exhaust portion is configured to protrude toward the direction of the bottom frame and is inserted into the exhaust space inside the bottom frame.

7. The battery pack according to claim 1, wherein, The battery assembly includes a cell assembly frame for storing the battery cells, and The battery cell assembly frame includes: an upper frame that covers the upper part of the battery cell; and a lower frame that covers the lower part of the battery cell.

8. The battery pack according to claim 1, wherein, The vent cover, which opens under a specified pressure or higher, is located below the vent of the battery cell.

9. The battery pack according to claim 8, wherein, The vent cover covers the vent of the battery cell.

10. The battery pack according to claim 8, wherein, The exhaust cover is configured to protrude toward the direction of the bottom frame and is inserted into the exhaust space toward the bottom frame.

11. The battery pack according to claim 1, wherein, The bottom frame includes an outer frame and an inner frame. The outer frame is located below the inner frame, and The exhaust space is provided by the outer frame and the inner frame.

12. The battery pack according to claim 11, wherein, The exhaust space is configured as multiple exhaust spaces, and The exhaust gases generated in the battery cell pass through the plurality of exhaust spaces in sequence.

13. The battery pack according to claim 11, wherein, The inner frame includes a concave part and a convex part, The exhaust space includes a first exhaust space disposed in the recess and a second exhaust space disposed in the protrusion, and The inner frame has filter holes that connect the first exhaust space and the second exhaust space.

14. The battery pack according to claim 13, wherein, The interior of the protrusion forms a multi-bend exhaust flow path.

15. The battery pack according to claim 13, wherein, An exhaust device is provided inside the protrusion, which opens or ruptures under a specified pressure or higher.

16. The battery pack according to claim 1, The battery pack includes a heat sink having at least one cooling plate disposed at at least one location between the battery cells.

17. The battery pack according to claim 16, wherein, The coolant flows inside the cooling plate.

18. The battery pack according to claim 16, wherein, The battery cell and the cooling plate are in surface contact with each other.

19. The battery pack according to claim 1, The battery pack also includes at least one pad member, which is disposed at at least one location between the battery cells.

20. The battery pack according to claim 1, wherein, The battery pack frame includes side surface frames extending along the edge of the bottom frame. The side surface frame is provided with a side exhaust space communicating with the exhaust space, and The exhaust gas flowing into the exhaust space of the bottom frame moves to the side exhaust space.

21. An apparatus comprising a battery pack according to claim 1.

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