Battery module, and battery pack and automobile comprising same

Abstract

The utility model relates to a battery module as well as a battery pack and an automobile comprising the battery module, and the battery module comprises a battery core stacking body, a battery core connecting body and a battery core connecting body, a pressing member that is disposed on at least one side of the cell stack, is disposed in a gap between the cells, and deforms due to external pressure; and a pressing member for pressing the pressing member on at least one side of the cell stack.

Description

Technical Field

[0001] The utility model relates to a battery module, a battery pack comprising the battery module, and a car.

[0002] This application claims the benefit of Korean Patent Application No. 10-2023-0143787, filed on October 25, 2023, and incorporates herein all of the disclosures disclosed in the specification and drawings of that application. Background Art

[0003] Secondary batteries, known for their ease of use across diverse product categories and possessing electrical properties such as high energy density, are widely used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) powered by electric power sources. These batteries offer the advantage of being disposable, significantly reducing the use of fossil fuels, and they produce no byproducts when used. Consequently, they are attracting attention as an environmentally friendly and energy-efficient new energy source.

[0004] Currently, widely used secondary batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. When a high output voltage is required, multiple cells can be connected in series to form a battery module or battery pack. Alternatively, to increase charge and discharge capacity, multiple cells can be connected in parallel to form a battery module or battery pack. Therefore, the number of cells in a battery module or battery pack can be adjusted based on the output voltage or charge and discharge capacity.

[0005] On the other hand, when multiple cells are connected in series or parallel to form a battery pack, a common method is to first assemble a battery module containing at least one cell, then use at least one of these modules and add other components to form a battery pack or battery cluster. Furthermore, a cell-to-pack (CTP) battery pack has recently emerged, where multiple cells are directly housed in a battery pack casing without modularization.

[0006] On the other hand, soft-pack batteries are made up of stacked electrodes and separators. Therefore, when the charge and discharge cycles are repeated, the stacked electrodes and separators may slide at the edges of the battery cells, causing the stacked electrodes and separators to become misaligned with each other. As a result, there is a problem that the thickness of the battery cells within the battery stack becomes uneven due to the reduced thickness of the battery cells at the edges. This uneven thickness phenomenon may cause localized degradation of the battery cells during the charge and discharge cycles, thus posing a problem.

[0007] Existing battery modules use extrusion components such as double-sided tape and polyurethane (PU) pads between battery cells to pressurize the multiple battery cells to prevent the battery cells from swelling during the charge and discharge cycle of the soft-pack battery cells.

[0008] However, although the pressing member can prevent bulging by pressurizing the battery cells, it is difficult to improve thickness deviations between the battery cells because different pressures are applied to local locations.

[0009] Therefore, it is necessary to develop a structure that can uniformly pressurize multiple battery cells to minimize thickness deviation between the battery cells, thereby extending the expected life of the battery cells. Utility Model Content

[0010] Technical issues

[0011] Therefore, the technical problem that the present invention aims to solve is to provide a battery module and a battery pack and a car including the battery module, wherein the battery module can minimize the thickness deviation between battery cells to extend the life of the battery cells.

[0012] However, the technical problems to be solved by the present invention are not limited to the above-mentioned technical problems. Those skilled in the art can understand other technical problems not mentioned through the following description of the present invention.

[0013] Technical Solution

[0014] In order to solve the above technical problems, a battery module of one embodiment of the present invention includes: a cell stack including a plurality of cell cells; an extrusion component arranged on at least one side of the cell stack and in the gap between the cell cells, and deformed by external pressure; and a pressurizing component for pressurizing the extrusion component on at least one side of the cell stack.

[0015] At least a portion of the pressing member may be disposed between the sealing portions of adjacent battery cells.

[0016] At least a portion of the pressing member may be disposed between the receiving portions of adjacent battery cells.

[0017] A plurality of the pressurizing members may be provided, each of which is disposed between the sealing portions of adjacent battery cells.

[0018] The pressurizing member may form partial surface contact with the pressing member.

[0019] The pressurizing member may extend along a height direction of the battery cell.

[0020] The pressurizing component may be located on a side of the battery cell where the electrode lead is located.

[0021] A bus bar frame may be further included, the bus bar frame being coupled to at least one side of the cell stack and pressurizing the pressurizing member toward the cell stack.

[0022] The pressurizing member may be mounted on the busbar frame.

[0023] The bus bar frame may include a protrusion, at least a portion of which protrudes to contact the pressing member.

[0024] The bus bar frame may include a main frame for covering one side surface of the cell stack; and a lower frame bent from a lower portion of the main frame toward a side of the cell stack to cover a lower portion of the pressing member.

[0025] The lower frame may include a seating portion for seating the battery cell stack and a coupling portion for coupling with the pressurizing member.

[0026] The battery cell stack may further include a first blocking member disposed at an outermost side of the battery cell stack and protruding further outward than the pressurizing member.

[0027] The battery cell stack may further include a second blocking member disposed between the battery cells, wherein a length of the first blocking member is greater than a length of the second blocking member.

[0028] In addition, the present invention provides a battery pack, which includes at least one battery module.

[0029] In addition, the present invention provides a car, which includes at least one battery module.

[0030] Beneficial effects

[0031] According to one embodiment of the present invention, the pressing member can uniformly pressurize multiple battery cells to minimize thickness variations between the battery cells, thereby extending the expected life of the battery cells. In particular, according to this embodiment of the present invention, the performance of the battery cells can be maximized.

[0032] In addition, according to one embodiment of the present invention, the process of connecting the battery cells can be simplified. Therefore, according to this embodiment of the present invention, the manufacturing cost and manufacturing time of the battery module can be reduced, thereby improving productivity.

[0033] In addition, the present invention may also have a variety of different effects, which will be described in each embodiment, or the description of effects that can be easily deduced by those skilled in the art will be omitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The multiple drawings attached to the specification of the present invention show the preferred embodiments of the present invention, which, together with the detailed description of the present invention described later, help to further understand the technical ideas of the present invention. Therefore, the present invention should not be interpreted only in accordance with the matters recorded in these drawings.

[0035] Figure 1 It is an overall three-dimensional view of a battery module according to an embodiment of the present invention.

[0036] Figure 2 It is an exploded perspective view of a battery module according to an embodiment of the present invention.

[0037] Figure 3 This is a diagram showing a battery module according to an embodiment of the present invention as viewed from above before a pressurizing member is coupled to a battery cell stack.

[0038] Figure 4 This is a diagram showing a battery module according to an embodiment of the present invention when a pressurizing member is coupled to a battery cell stack, as viewed from above.

[0039] Figure 5 This is a diagram showing a battery module according to another embodiment of the present invention when a pressurizing member is coupled to a battery cell stack, as viewed from above.

[0040] Figure 6 It is an exploded perspective view of a partial structure of a battery module according to an embodiment of the present invention.

[0041] Figure 7 This is a diagram showing a battery module according to an embodiment of the present invention as viewed from above before the busbar frame is coupled to the battery cell stack.

[0042] Figure 8 This is a partial view of a battery module according to an embodiment of the present invention when the busbar frame is combined with the battery cell stack as viewed from above. Figure 8 Yes, it can be shown Figure 1 Figure Ⅰ-Ⅰ' section.

[0043] Figure 9 This is a partial view of a battery module using a busbar frame according to an embodiment of the present invention, as viewed from the side. Figure 9 Can be shown Figure 1 Figure Ⅱ-Ⅱ' section.

[0044] Figure 10 This is a partial view of a battery module using a busbar frame according to another embodiment of the present invention, as viewed from the side. Figure 10 Can be shown Figure 1 Figure Ⅱ-Ⅱ' section.

[0045] Figure 11 It is a perspective view of a busbar frame in a battery module according to another embodiment of the present invention.

[0046] Figure 12 This is a cross-sectional view of a battery module according to an embodiment of the present invention. Figure 12 Can be shown Figure 1 Figure Ⅰ-Ⅰ' section.

[0047] Reference numerals:

[0048] 10: Battery module

[0049] 100: Battery cell stack

[0050] 110: Battery Cell

[0051] 111: Sealing part

[0052] 112: Storage Department

[0053] 113: Electrode lead

[0054] 120: First blocking component

[0055] 130: Second blocking component

[0056] 200: Extruded parts

[0057] 300: Pressurized parts

[0058] 400: Module housing

[0059] 410: Shell body

[0060] 420: End plate

[0061] 500: Busbar frame

[0062] 510: Main frame

[0063] 511: Protrusion

[0064] 512: Lead duct

[0065] 520: Lower frame

[0066] 521: Resettlement Department

[0067] 522: Joint

[0068] 600: Busbar DETAILED DESCRIPTION

[0069] The following describes a preferred embodiment of the present invention in detail with reference to the accompanying drawings. Prior to this, the terms used in the specification and claims of the present invention cannot be interpreted limited to their common meanings or dictionary meanings. The inventor may appropriately define the concepts of the terms to describe their invention in the best possible way. Based on this principle, the terms should be interpreted as concepts that are consistent with the technical concept of the present invention.

[0070] Therefore, the embodiments described in the specification of the present invention and the technical features shown in the drawings are merely the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention. Therefore, on the filing date of this application, there may be multiple equivalent ranges and multiple variations that can be replaced.

[0071] In addition, the present invention includes multiple embodiments. For substantially the same or similar technical features in each embodiment, repeated description thereof will be omitted, and the differences will be mainly described.

[0072] On the other hand, terms such as up, down, left, right, front, and back may be used in the present invention to indicate directions, but these terms are only for convenience of description, and those skilled in the art understand that this may change according to the position of the object as the subject or the position of the observer.

[0073] For example, in an embodiment of the present invention, the X-axis direction shown in the accompanying drawings may represent the left-right direction, the Y-axis direction may represent the front-back direction perpendicular to the X-axis direction in the horizontal plane (XY plane), and the Z-axis direction may represent the up-down direction (vertical direction) perpendicular to both the X-axis direction and the Y-axis direction.

[0074] Figure 1 This is an overall three-dimensional diagram of a battery module according to an embodiment of the present invention. Figure 2 This is an exploded perspective view of a battery module according to an embodiment of the present invention. Figure 3 This is a diagram showing the battery module of one embodiment of the present invention as viewed from above before the pressurizing member is attached to the battery cell stack. Figure 4 This is a diagram showing the state of a battery module according to an embodiment of the present invention when a pressurizing member is coupled to a stack of battery cells, as viewed from above. Figure 5 This is a diagram showing a battery module according to another embodiment of the present invention when a pressurizing member is coupled to a battery cell stack, as viewed from above.

[0075] Reference Figures 1 to 4 A battery module 10 according to an embodiment of the present invention includes a cell stack 100 , an extrusion component 200 , and a pressurizing component 300 .

[0076] Main reference Figure 2The battery cell stack 100 may include a plurality of battery cells 110. The battery cells 110 may include an electrode assembly (including an anode plate, a cathode plate, and a separator), an electrolyte, and a battery case. The plurality of battery cells 110 may be electrically connected to each other. For example, the plurality of battery cells 110 may be electrically connected to each other in series and / or in parallel via bus bars.

[0077] On the other hand, the present invention is not limited to a specific type or form of battery cell 110. Various battery cells 110 known to the public as of the filing date of this invention may be used to form the battery module 10 of this invention. As shown in the figure, this embodiment targets pouch-type secondary batteries, which have high energy density and are easily stackable. However, prismatic secondary batteries may also be used as the battery cells 110 of this invention.

[0078] Reference Figure 3 The battery cell 110 may include a receiving portion 112 and a sealing portion 111. The receiving portion 112 may be formed to receive the electrode assembly, and the sealing portion 111 may be formed such that the outer edge of the receiving portion 112 is sealed by heat fusion.

[0079] The battery cell stack 100 may be formed by stacking a plurality of battery cells 110 in one direction. Figure 2 As shown in FIG, multiple battery cells 110 can be arranged side by side in the left-right direction (X-axis direction) while standing upright in the vertical direction (Z-axis direction). In this case, in each battery cell 110, the sealing portion 111 can face the front-to-back direction (Y-axis direction) and the up-down direction (Z-axis direction), and the storage portion 112 faces the left-right direction (X-axis direction).

[0080] Reference Figure 3 and Figure 4 The extrusion member 200 may be disposed on at least one side of the battery cell stack 100. For example, the extrusion member 200 may be disposed on both sides of the battery cell 110 in the front-to-back direction (the Y-axis direction in the drawings). Thus, the extrusion member 200 may be disposed between the longitudinal ends of the battery cell 110.

[0081] At this time, the pressing member 200 may be disposed in the gaps between the battery cells 110. Specifically, at least a portion of the pressing member 200 may be disposed in the gaps between the sealing portions 111 and / or the receiving portions 112 of adjacent battery cells 110.

[0082] The extrusion member 200 can be configured to partially deform under external pressure. Specifically, the extrusion member 200 can deform to conform to the shape of the gaps between the battery cells 110 under external pressure, such as from the pressurized member 300. In particular, the extrusion member 200 can partially deform in thickness at locations where a recess in the thickness direction of the battery cell 110 is formed.

[0083] The extrusion member 200 may comprise a resilient material. For example, the extrusion member 200 may comprise, or consist solely of, materials such as silicone or polyurethane. When the extrusion member 200 is formed of an elastomeric material, it can be evenly compressed by external pressure, thereby further improving the adhesion between the battery cells 110.

[0084] According to one embodiment of the present invention, the extruded member 200 may fill the gaps between the battery cells 110. The extruded member 200 may be applied to both sides of the battery cell stack 100 in the front-to-back direction. The extruded member 200 may be liquid and may solidify over time after being applied to both sides of the battery cell stack 100 in the front-to-back direction.

[0085] This eliminates the need to manufacture the extrusion member 200 separately to suit the shape of the gaps between the battery cells 110, thereby reducing the manufacturing cost and time of the battery module. Furthermore, the coating can be applied to one side of the battery cell stack 100 with a uniform thickness, tailored to the size or shape of the gaps between the battery cells 110.

[0086] On the other hand, the pressurizing member 300 may be disposed on at least one side of the battery cell stack 100. The pressurizing member 300 may be configured to pressurize the pressing member 200. In other words, the pressurizing member 300 may be disposed on the side of the pressing member 200 to pressurize the pressing member 200. The pressurizing member 300 may be formed of metal or plastic.

[0087] According to the above embodiment of the present invention, the pressurizing member 300 pressurizes the extruding member 200, allowing the extruding member 200 to penetrate between the battery cells 110, thereby compensating for thickness variations among the battery cells 110. Therefore, according to the above embodiment, localized degradation of the battery cells 110 during charge and discharge cycles can be prevented, thereby extending the expected lifespan of the battery cells 110 and maximizing the performance of the battery cells 110.

[0088] In addition, according to the above embodiment of the present invention, the pressing member 200 and the pressurizing member 300 fix the battery cells 110 on both sides, thereby improving the structural rigidity of the plurality of battery cells 110 .

[0089] Furthermore, when a fire occurs inside the battery module 10, the pressing member 200 can prevent heat such as flames generated from the burning battery cells 110 from spreading along the stacking direction of the battery cells 110 or along the length direction of the battery cells 110. Therefore, thermal propagation to adjacent battery cells 110 can be minimized.

[0090] Furthermore, according to the above embodiment, adhesive members such as tapes for bonding adjacent battery cells 110 can be omitted. This simplifies the bonding process between the battery cells 110, thereby reducing the manufacturing cost and time of the battery module and improving productivity.

[0091] On the other hand, refer to Figure 1 and Figure 2 The battery module 10 of one embodiment of the present invention may further include a module housing 400. The module housing 400 may have an internal space for accommodating the battery cell stack 100, the extrusion member 200, and the pressurizing member 300. The module housing 400 of this embodiment may include a housing body 410 and end plates 420 disposed on the front and rear of the housing body 410.

[0092] The housing body 410 may include an upper plate, a lower plate, a left plate, and a right plate to form a storage space, and the battery cell stack 100 may be stored in the storage space. The housing body 410 may be formed of a rigid and heat-resistant metal material to provide physical and chemical protection for the stored battery cell stack 100.

[0093] In addition, the end plate 420 may be combined with the housing body 410 to cover the open portion of the housing body 410. More specifically, the housing body 410 may be open at the front and rear, and the end plate 420 may be combined with the open portions at the front and rear of the housing body 410.

[0094] On the other hand, although not shown, the housing body 410 may be formed with exhaust holes to enable directional exhaust in one direction. As an example, a plurality of exhaust holes may be formed on the upper surface of the housing body, and the exhaust holes can be used to directional exhaust upward from the battery module 10.

[0095] At least a portion of the pressing member 200 may be disposed between the sealing portions 111 of adjacent battery cells 110. Figure 3 and Figure 4 As shown in the embodiment of FIG, the pressing member 200 can be arranged between the sealing portions 111 located in the front-to-back direction of the battery cells 110. In other words, the pressing member 200 can be arranged so as to be surrounded by the sealing portions 111 and the receiving portions 112 of adjacent battery cells 110. Thus, the pressurizing member 300 can pressurize the pressing member 200, which is arranged between the sealing portions 111 that protrude further forward or rearward than the receiving portions 112, toward the battery cell stack 100.

[0096] When the pressing member 200 disposed between the sealing portions 111 is pressurized by the pressurizing member 300 before curing, the pressing member 200 can also be disposed between the receiving portions 112. In other words, at least a portion of the pressing member 200 can be disposed between the receiving portions 112 of adjacent battery cells 110. In this case, the pressing member 200 can deform and flow between the receiving portions 112 of the battery cells 110. The pressing member 200 disposed between the receiving portions 112 can pressurize the receiving portions 112 of adjacent battery cells 110.

[0097] According to the above embodiment of the present invention, the pressing member 200 is disposed between the receiving portions 112 of the battery cells 110, thereby uniformly pressurizing the receiving portions 112 of the battery cells 110 and effectively alleviating thickness variations between the battery cells 110. In particular, the pressing member 200 is disposed in each gap at the end of the receiving portion 112 of the battery cell 110, thereby compensating for any thickness depressions generated at the end of the battery cell 110.

[0098] On the other hand, refer to Figure 4 , may be provided with a plurality of pressurizing components 300. The plurality of pressurizing components 300 may be arranged in a straight line at predetermined intervals along the stacking direction of the battery cells 110. The plurality of pressurizing components 300 may be arranged between the sealing portions 111 of adjacent battery cells 110. In addition, the plurality of pressurizing components 300 may be arranged to face the storage portions 112 of the battery cells 110 in the front-to-back direction. According to the above-mentioned embodiment of the present invention, the pressurizing component 300 may be arranged in the space between adjacent battery cells 110 to pressurize the extrusion component 200 toward the battery cell stack 100.

[0099] In addition, the pressurizing member 300 may be configured to be in surface contact with the extrusion member 200. In other words, the pressurizing member 300 may be in surface contact with the extrusion member 200 disposed between the sealing portions 111 and pressurize the extrusion member 200. Specifically, the extrusion member 200 may be formed in a flat outer surface, and the pressurizing member 300 may have a flat inner surface corresponding to the extrusion member 200. For example, Figure 4 As shown in the embodiment of FIG, the pressurizing member 300 may be arranged to be parallel to and face the outer surface of the pressing member 200.

[0100] The pressing member 300 may be formed to correspond to the shape of the front surface or the rear surface of the facing receiving portion 112. Figure 5 As shown in the embodiment of FIG, the plurality of pressurizing members 300 may each include a bent portion. The bent portion is bent and disposed between adjacent battery cells 110.

[0101] Alternatively, unlike the above embodiment, the pressurizing member 300 may further include a protrusion that faces the outer surface of the pressing member 200 in parallel, and a portion of the inner surface thereof corresponds to the shape of the battery cell 110 .

[0102] According to the above embodiment of the present invention, when the pressurizing member 300 applies pressure to the pressing member 200, the pressing member 200 is pressed to conform to the shape of the battery cells 110, thereby allowing the pressing member 200 to more easily enter between the battery cells 110. Thus, according to the above embodiment of the present invention, the pressing member 200 can be formed to conform to the thickness or shape of the receiving portion 112 of the battery cell 110, which has a reduced thickness at the distal end. This allows the pressing member 200 to further adhere to and pressurize the distal end of the receiving portion 112 between the battery cells 110.

[0103] In addition, the pressurizing member 300 may extend along the height direction (Z-axis direction) of the battery cell 110. According to the above embodiment of the present invention, the depression in the thickness direction of the battery cell 110 may be compensated along the height direction of the battery cell 110.

[0104] On the other hand, refer to Figure 4 The plurality of battery cells 110 may each include an electrode lead 113. The electrode lead 113 may be connected to the electrode assembly and extend outward from the battery housing.

[0105] A pair of electrode leads 113 may be provided, extending from both ends of the battery cell 110, i.e., along the longitudinal direction (±Y direction). In this case, the pair of electrode leads 113 may be an anode lead and a cathode lead. As needed, the battery cell 110 may also have two electrode leads 113 located only at one end in the Y-axis direction, for example, at the end in the +Y-axis direction.

[0106] At this time, the extrusion component 200 can be arranged on the side of the battery cell 110 where the electrode lead 113 is located. Similarly, the pressurizing component 300 can also be arranged on the side of the battery cell 110 where the electrode lead 113 is located. According to the above embodiment of the utility model, the phenomenon of misalignment of the electrode plate and the diaphragm inside the electrode assembly can be effectively prevented on the side where the electrode lead 113 is located. As a result, the depression in the thickness direction of the battery cell 110 can be compensated on the side where the electrode lead 113 is located, thereby effectively preventing the uneven thickness of multiple battery cells 110.

[0107] Figure 6 This is an exploded perspective view of a partial structure of a battery module according to an embodiment of the present invention. Figure 7 This is a diagram of the battery module viewed from above before the busbar frame of one embodiment of the present invention is combined with the battery cell stack. Figure 8This is a partial view of a battery module when the busbar frame of one embodiment of the present invention is combined with the battery cell stack as viewed from the top. Figure 8 Yes, it can be shown Figure 1 Figure Ⅰ-Ⅰ' section.

[0108] Reference Figure 2 、 Figures 6 to 8 The battery module 10 according to an embodiment of the present invention may further include a bus bar frame 500 and a bus bar 600 .

[0109] The busbar frame 500 may be coupled to at least one side of the cell stack 100. The busbar frame 500 may be formed in a plate shape to cover both ends of the cell stack 100 and the front (-Y direction) or rear (+Y direction) of the cell stack 100. The busbar frame 500 may be injection molded from an electrically insulating material such as plastic.

[0110] Reference Figure 8 , the busbar frame 500 may include a lead groove 512. The lead groove 512 may be located on the side where the electrode leads 113 of the multiple battery cells 110 are located. The lead groove 512 is formed to be able to pass at least a portion of the electrode leads 113 of the multiple battery cells 110. At this time, the multiple electrode leads 113 passing through the lead groove 512 can be bent and stacked on each other. Based on this stacked structure, the multiple battery cells 110 with the electrode leads 113 in contact with each other can be electrically connected to each other.

[0111] A plurality of lead grooves 512 may be formed spaced apart from each other along the stacking direction (X direction) of the plurality of battery cells 110. In particular, the lead grooves 512 may be staggered to avoid overlapping with the pressurizing member 300.

[0112] The busbar 600 may be disposed on the outer surface of the busbar frame 500. The busbar 600 may be disposed between the busbar frame 500 and the stacked electrode leads 113. The busbar 600 may be electrically connected to the electrode leads 113. Furthermore, through this electrical connection, the busbar 600 may transmit status information about the battery cells 110 to external components. For example, the busbar 600 may transmit voltage information about the battery cells 110 to an external control device such as a battery management system (BMS).

[0113] The bus bar 600 may be formed of a conductive material to transmit electrical signals, for example, copper or aluminum.

[0114] On the other hand, the busbar frame 500 can be formed so as to pressurize the pressurizing member 300 toward the cell stack 100. In other words, when the busbar frame 500 is coupled to at least one side of the cell stack 100, the busbar frame 500 can pressurize the pressurizing member 300 toward the cell stack 100. Thus, the pressurizing member 300 can be pressurized toward the cell stack 100 by the busbar frame 500. Furthermore, the busbar frame 500 can fix the pressurized state of the pressurizing member 300 relative to the pressing member 200.

[0115] According to the above embodiment, the busbar frame 500 can keep the pressurizing member 300 in close contact with the pressing member 200. Thus, the pressing member 200 can completely fill the gaps between the battery cells 110, thereby compensating for the thickness-wise depressions of the battery cells 110 in the battery cell stack 100.

[0116] Figure 9 This is a partial view of a battery module to which a busbar frame according to an embodiment of the present invention is applied, as viewed from the side. Figure 9 Can be shown Figure 1 Figure Ⅱ-Ⅱ' section.

[0117] The pressurizing member 300 can be mounted on the busbar frame 500. The pressurizing member 300 can be manufactured separately and then attached to the busbar frame 500. For example, the pressurizing member 300 can be attached to the busbar frame 500 by welding or bolts. Alternatively, the pressurizing member 300 can be integrally formed with the busbar frame 500. For example, the pressurizing member 300 can be injection molded together with the busbar frame 500.

[0118] According to the above embodiment of the present invention, the pressurizing member 300 is attached to the busbar frame 500. Thus, the pressurizing member 300 can simultaneously pressurize the pressing member 200 while the busbar frame 500 is being assembled to the battery cell stack 100. This simplifies the manufacturing process of the battery module, thereby improving productivity.

[0119] According to one embodiment of the present invention, Figure 9 As shown in the embodiment, the busbar frame 500 may include a protrusion 511 that protrudes at least partially. The protrusion 511 may be formed to be able to contact the pressurizing member 300. In other words, the protrusion 511 may be disposed in the space between the busbar frame 500 and the pressurizing member 300. Thus, when the busbar frame 500 is coupled to at least one side of the battery cell stack 100, the protrusion 511 can pressurize the pressurizing member 300 toward the extrusion member 200. According to the above embodiment of the present invention, the protrusion 511 can provide a pressing force for the pressurizing member 300 to pressurize the extrusion member 200.

[0120] The protrusions 511 may be provided in plurality and spaced apart from each other in the height direction. Thus, the pressurizing member 300 can uniformly pressurize the pressing member 200 in the entire height direction.

[0121] The pressurizing member 300 may be adhered or bonded to the protrusion 511. Thus, the pressurizing member 300 can be mounted on the busbar frame 500. According to the above embodiment of the present invention, the pressurizing member 300 is mounted on the busbar frame 500. Thus, the pressurizing member 300 can pressurize the pressing member 200 while the busbar frame 500 is assembled to the cell stack 100.

[0122] Figure 10 This is a partial view of a battery module to which a busbar frame according to another embodiment of the present invention is applied, as viewed from the side. Figure 10 It shows Figure 1 In addition, Figure 11 It is a perspective view of a busbar frame in a battery module according to another embodiment of the present invention.

[0123] According to another embodiment of the present invention, Figure 10 and Figure 11 As shown, the bus bar frame 500 may include a main frame 510 and a lower frame 520 .

[0124] The main frame 510 can be formed to cover one side surface of the battery cell stack 100. The main frame 510 can be formed to cover at least one side surface of the battery cell stack 100 in the front-to-back direction. The main frame 510 has lead grooves 512, so that the electrode leads 113 of the battery cells 110 can pass outside the main frame 510. In addition, bus bars 600 can be arranged on the outer surface of the main frame 510.

[0125] The lower frame 520 may be formed to be bent from the lower portion of the main frame 510 toward the cell stack 100. The lower frame 520 may be formed to cover at least a portion of the cell stack 100 from below. Figure 10 The lower frame 520 can be formed to cover the lower portion of the extrusion member 200. In particular, the lower frame 520 can be formed to contact and support the lower portion of the extrusion member 200. Thus, by providing the lower frame 520, it is possible to prevent the extrusion member 200 disposed between the battery cells 110 from being exposed downward.

[0126] In addition, the lower frame 520 may be formed to be able to seat the pressurizing member 300. Specifically, referring to Figure 11 The lower frame 520 may include a seating portion 521 for seating the cell stack 100 and a coupling portion 522 for coupling the pressurizing member 300. For example, the pressurizing member 300 may be welded to the coupling portion 522.

[0127] According to this embodiment, the lower end of the pressurizing member 300 is coupled to the lower frame 520 . Thus, the pressurizing member 300 can simultaneously pressurize the pressing member 200 while the busbar frame 500 is assembled to the cell stack 100 . This simplifies the manufacturing process of the battery module 10 , thereby improving productivity.

[0128] At this point, according to another embodiment of the present invention, an elastic body may be further disposed between the main frame 510 and the pressurizing member 300. For example, the elastic body may be a leaf spring. According to the above embodiment of the present invention, when the pressurizing member 300 applies pressure to the extrusion member 200 as the busbar frame 500 is coupled to the cell stack 100, the elastic body can act as a buffer, thereby preventing damage to the cell stack 100 due to excessive pressure.

[0129] Figure 12 This is a cross-sectional view of a battery module according to an embodiment of the present invention. Figure 12 It shows Figure 1 Figure Ⅰ-Ⅰ' section.

[0130] Reference Figure 12 , the cell stack 100 in the battery module 10 of the present invention may include blocking members 120, 130. A plurality of blocking members 120, 130 may be provided. At this time, the plurality of blocking members 120, 130 may be arranged in a manner spaced apart by a predetermined distance along one direction, that is, the stacking direction (X-axis direction) of the battery cells 110. In addition, the plurality of blocking members 120, 130 may be arranged at a prescribed interval every at least one battery cell 110 (for example, every one or more battery cells 110). The blocking members 120, 130 may be in face-to-face contact with both sides of at least a portion of the battery cells 110 among the plurality of battery cells 110. In particular, the blocking members 120, 130 may be in face-to-face contact with the storage portion of the battery cell 110. In this embodiment, a plurality of blocking members 120, 130 are provided in a form arranged every at least two or more battery cells 110.

[0131] The barrier members 120 and 130 are in the form of pressure-applying pads and can be formed from a material with excellent heat and / or flame resistance, such as silicone, aerogel, or polyurethane. The pressure-applying pads of the barrier members 120 and 130 can suppress expansion of the battery cell 110 when a bulge occurs.

[0132] In addition, when a fire occurs inside the battery module 10, the heat-resistant and / or fire-proof barrier components 120 and 130 can block the heat of the flames, etc. generated from the burning battery cells 110 from spreading along the stacking direction of the battery cells 110, that is, they act as thermal barriers. Therefore, the heat propagation to the adjacent multiple battery cells 110 can be minimized. The barrier components 120 and 130 can not only provide thermal insulation, but also block high-temperature gases, flames, vomited matter, etc. generated from the battery cells 110. As a result, the barrier components 120 and 130 can separate or isolate the multiple battery cells 110 to prevent the flames, etc. from transferring between the battery cells 110.

[0133] Specifically, the blocking members 120 and 130 may include a first blocking member 120 disposed at the outermost side of the battery cell stack 100 and a second blocking member 130 disposed between the battery cells 110. Figure 4 As shown, the pressing member 200 may be disposed between the battery cell 110 adjacent to the first blocking member 120 and the first blocking member 120 .

[0134] In addition, when the battery cells 110 are disposed in the middle of the battery cell stack 100 and face the second barrier member 130, the pressing member 200 may be disposed between adjacent battery cells 110 and between the battery cells 110 and the second barrier member 130. In this case, the pressurizing member 300 may face the second barrier member 130 between adjacent battery cells 110.

[0135] The first blocking member 120 may protrude further outward than the pressurizing member 300. Furthermore, the length of the first blocking member 120 may be greater than the length of the second blocking member 130. That is, the first blocking member 120 may protrude further toward both sides of the length direction of the cell stack 100 than the second blocking member 130.

[0136] Thus, when the extrusion member 200 is disposed on the outermost battery cell 110 of the battery cell stack 100, the extrusion member 200 is not exposed to the outside. Furthermore, according to the above-described embodiment of the present invention, the extrusion members 200 can be evenly disposed at both ends of the battery cell stack 100 in the stacking direction, thereby compensating for any depression in the thickness direction of the outermost battery cell 110 of the battery cell stack 100.

[0137] A battery pack according to an embodiment of the present invention may include one or more battery modules 10 according to an embodiment of the present invention. The battery pack according to the present invention may further include components of a battery pack known to the public as of the filing date of this invention, such as a battery management system (BMS) for overall control of the charging and discharging of the one or more battery modules, current sensors, fuses, and the like.

[0138] Furthermore, in the battery pack of the present invention, the module housing 400 can function as the battery pack housing. In this case, the module housing 400 can house battery pack components such as a battery management system, busbars, and relays. Since the battery cells 110 are directly housed in the battery pack housing, this is referred to as a "cell-to-pack" system.

[0139] An automobile according to one embodiment of the present invention may include one or more battery packs or battery modules according to one embodiment of the present invention. The automobile according to the present invention may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle. The automobile includes four-wheeled vehicles and two-wheeled vehicles. The automobile receives power and operates from a battery pack or battery module 10 according to one embodiment of the present invention.

[0140] The present invention has been described above with reference to the limited embodiments and drawings, but the present invention is not limited thereto. Those skilled in the art can make various modifications and variations within the technical concept of the present invention and the equivalent scope of the appended claims.

Claims

1. A battery module, characterized in that: include: A battery cell stack, comprising a plurality of battery cells; An extrusion component is disposed on at least one side of the battery cell stack and in the gaps between the battery cells, and is deformed by external pressure; as well as A pressurizing component pressurizes the pressing component on at least one side of the battery cell stack.

2. The battery module according to claim 1, wherein: At least a portion of the pressing member is disposed between the sealing portions of adjacent battery cells.

3. The battery module according to claim 2, characterized in that At least a portion of the pressing member is disposed between the receiving portions of adjacent battery cells.

4. The battery module according to claim 2, wherein: A plurality of the pressurizing members are provided, each of which is disposed between the sealing portions of adjacent battery cells.

5. The battery module according to claim 1, wherein: The pressurizing member forms partial surface contact with the pressing member.

6. The battery module according to claim 1, characterized in that The pressing member extends along a height direction of the battery core.

7. The battery module according to claim 1, wherein: The pressurizing component is located on the side where the electrode lead of the battery cell is located.

8. The battery module according to claim 1, wherein: A bus bar frame is further included. The bus bar frame is coupled to at least one side of the battery cell stack and pressurizes the pressurizing member toward the battery cell stack.

9. The battery module according to claim 8, characterized in that: The pressurizing member is mounted on the busbar frame.

10. The battery module according to claim 9, characterized in that: The bus bar frame includes a protruding portion, at least a portion of which protrudes and contacts the pressing member.

11. The battery module according to claim 9, characterized in that The busbar frame comprises: a main frame, used to cover one side surface of the battery cell stack; and The lower frame is bent from the lower portion of the main frame toward one side of the battery cell stack to cover the lower portion of the extrusion component.

12. The battery module according to claim 11, characterized in that The lower frame includes: a placement portion, for placing the battery cell stack; and The combining portion is used to combine with the pressurizing component.

13. The battery module according to claim 1, wherein: The battery cell stack further includes a first blocking member disposed at the outermost side of the battery cell stack and protruding further outward than the pressurizing member.

14. The battery module according to claim 13, characterized in that: The battery cell stack further includes a second barrier component disposed between the battery cells. The length of the first blocking member is greater than the length of the second blocking member.

15. A battery pack, characterized in that: The method comprises at least one battery module according to any one of claims 1 to 14.

16. An automobile, characterized in that: The method comprises at least one battery module according to any one of claims 1 to 14.

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