Battery assembly

Abstract

A battery assembly of the present disclosure comprises: a plurality of battery cells stacked and arranged; a first body forming an accommodation space for accommodating the plurality of battery cells; a second body positioned to face the first body and forming the accommodation space together with the first body; and a support frame positioned between the plurality of battery cells and the second body and including a flow path extending in one direction.

Description

Battery assembly

[0001] The present disclosure relates to a battery assembly, and more particularly, to a battery assembly for improving the stability of the battery assembly.

[0002] Secondary batteries convert electrical energy into chemical energy, allowing them to be stored and reused multiple times through charging and discharging. Due to their economical and environmentally friendly properties, secondary batteries are widely used across various industries. Lithium secondary batteries, in particular, are widely used in portable devices requiring high energy density, as well as in various industries.

[0003] To achieve high capacity and high output, secondary batteries can be manufactured into battery modules or battery packs by grouping a certain number of battery cells. For example, a battery module containing multiple battery packs can be manufactured, or a battery pack containing multiple battery modules can be manufactured.

[0004] Additionally, a cell-to-pack structure is emerging, in which battery cells are manufactured into a battery pack to reduce the weight of the battery pack and increase its energy density.

[0005] However, during the repeated charging and discharging of secondary batteries, high heat can cause fire, potentially spreading to adjacent cells and potentially causing an explosion. To address this, research is being conducted on structures that prevent the spread of heat and flames to adjacent cells.

[0006] Additionally, research is actively being conducted on structures that can increase durability to protect secondary batteries from external pressure when grouping multiple secondary batteries.

[0007] The problem that the present disclosure seeks to solve is to provide a battery assembly that improves stability by preventing the spread of flame or gas to adjacent cells.

[0008] In addition, another problem that the present disclosure seeks to solve is to provide a battery assembly having improved stability by protecting battery cells accommodated within a receiving space from external pressure or vibration.

[0009] In addition, another problem that the present disclosure seeks to solve is to provide a battery assembly that can reduce weight and manufacturing cost.

[0010] Furthermore, the battery assembly of the present disclosure can be widely applied to green technology fields such as electric vehicles, battery charging stations, and other battery-powered solar and wind power generation. Furthermore, the present disclosure can be used in eco-friendly electric vehicles, hybrid vehicles, and other vehicles that aim to prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0011] A battery assembly according to the present disclosure includes a plurality of battery cells arranged in a stacked manner, a first body forming a receiving space for receiving the plurality of battery cells, a second body positioned to face the first body and forming the receiving space together with the first body, and a support frame including a flow path extending in one direction and positioned between the plurality of battery cells and the second body.

[0012] The above support frame may include a bottom portion formed parallel to the first body, and an extension portion extending from both ends of the bottom portion toward the first body or the second body.

[0013] The above extension part may be formed by bending one end to be parallel to the first body or the second body.

[0014] The above extension portion can be extended to form an incline with the bottom portion.

[0015] The above-mentioned euro can be formed in a channel shape.

[0016] The above support frame may further include a buffer member positioned at one end of the extension portion.

[0017] The above extension portion can be in contact with the second body.

[0018] The above bottom part may further include a bottom hole communicating with the euro.

[0019] The support frame may further include side frames extending from both ends toward the first body.

[0020] One end of the above side frame can be connected to the first body.

[0021] The above side frame may further include a side hole formed through the side frame.

[0022] The stacking direction in which the plurality of battery cells are stacked may be formed perpendicular to one direction in which the euro extends.

[0023] The module cover is further included, which is positioned inside the above-mentioned receiving space and accommodates the plurality of battery cells, and the support frame can be positioned between the module cover and the second body.

[0024] The above module cover may include a cover body that covers the plurality of battery cells and includes a cover hole formed through the cover body, and a side body that extends toward the first body from both ends of the cover body.

[0025] The above side body can be combined with the above first body

[0026] The above side body may be provided in a manner such that one end is bent and parallel to the first body.

[0027] The side frame includes a through hole at one end, the side body includes a connecting hole at one end positioned to overlap the through hole, and the side frame and the side body can be connected together to the first body through the through hole and the connecting hole.

[0028] The above plurality of battery cells can be in contact with the first body.

[0029] It may further include a heat-conducting portion positioned between the first body and the plurality of battery cells.

[0030] The battery assembly of the present disclosure includes a plurality of battery cells arranged in a stacked manner, a first body forming a receiving space for receiving the plurality of battery cells, a second body positioned to face the first body, forming the receiving space together with the first body, and spaced apart from the plurality of battery cells, and a flow path formed between the plurality of battery cells and the second body.

[0031] The present disclosure can provide a battery assembly with improved stability by preventing the spread of flame or gas to adjacent cells.

[0032] In addition, another problem that the present disclosure seeks to solve is to provide a battery assembly with improved stability by protecting battery cells accommodated within a receiving space from external pressure or vibration.

[0033] In addition, another problem that the present disclosure seeks to solve is to provide a battery assembly that can reduce weight and manufacturing cost.

[0034] FIG. 1 illustrates a battery assembly according to one embodiment of the present disclosure.

[0035] FIG. 2 illustrates a battery cell according to one embodiment of the present disclosure.

[0036] FIG. 3 illustrates a cell stack according to one embodiment of the present disclosure.

[0037] FIGS. 4 and 5 illustrate an example of a battery assembly according to one embodiment of the present disclosure.

[0038] FIG. 6 illustrates a support frame and a side frame according to one embodiment of the present disclosure.

[0039] Figures 7 to 9 illustrate various embodiments of the support frame of the present disclosure.

[0040] FIGS. 10 to 12 illustrate a modular laminate according to one embodiment of the present disclosure.

[0041] FIG. 13 illustrates a battery assembly according to another embodiment of the present disclosure.

[0042] FIG. 14 illustrates a bulkhead according to one embodiment of the present disclosure.

[0043] FIG. 15 illustrates a bulkhead according to another embodiment of the present disclosure.

[0044] Hereinafter, the present disclosure will be described in detail with reference to the attached drawings. However, these are merely exemplary and the present disclosure is not limited to the specific embodiments described as examples.

[0045] Certain terms used in this specification are for convenience of explanation only and are not intended to limit the illustrated embodiments.

[0046] For example, expressions such as "same" and "same as" not only indicate a strictly identical state, but also indicate a state in which there is a difference in tolerance, or the degree to which the same function is obtained.

[0047] For example, expressions indicating relative or absolute arrangements such as “in which direction,” “along which direction,” “parallel,” “perpendicular,” “centered,” “concentric,” or “coaxial” not only strictly indicate such arrangements, but also indicate a state of relative displacement with an angle or distance that allows for tolerance, or the degree to which the same function is obtained.

[0048] In order to explain the present disclosure, the following description is based on a spatial orthogonal coordinate system with mutually orthogonal X-axis, Y-axis, and Z-axis. Each axis direction (X-axis direction, Y-axis direction, Z-axis direction) means both directions in which each axis extends.

[0049] The X-direction, Y-direction, and Z-direction mentioned below are for the purpose of explanation so that the present disclosure can be clearly understood, and it is of course possible to define each direction differently depending on where the standard is set.

[0050] The use of terms such as "first," "second," and "third" before the components mentioned below is intended solely to avoid confusion regarding the components they refer to, and has no bearing on the order, importance, or dominant-subordinate relationship between the components. For example, an invention can be implemented that includes only a second component without a first component.

[0051] As used herein, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0052] FIG. 1 illustrates a battery assembly according to one embodiment of the present disclosure, and FIG. 2 illustrates a battery cell according to one embodiment of the present disclosure.

[0053] The battery assembly (1) according to the present disclosure includes a plurality of battery cells (10). The battery cell (10) described herein refers to a secondary battery that can be repeatedly used by charging and discharging electrical energy. For example, it may be a lithium secondary battery, but is not limited thereto.

[0054] The battery cell (10) may be classified into a pouch-type secondary battery, a prismatic secondary battery, or a cylindrical secondary battery depending on its shape. In this specification, a pouch-type secondary battery is illustrated as an example for convenience of explanation, but the present invention is not limited thereto.

[0055] Meanwhile, the battery assembly (1) described in this specification may mean a battery module or a battery pack. A battery module means a battery assembly (1) in which battery cells (10) are grouped in one or more groups to protect them from external shock, heat, vibration, etc. and to have high output and high capacity characteristics. A battery pack means a battery assembly (1) in which battery cells (10) or battery modules are grouped in one or more groups.

[0056] In other words, the battery assembly (1) of the present disclosure means an assembly that includes a plurality of battery cells (10) in a housing (100) so as to obtain preset output and capacity.

[0057] Referring to FIG. 1, the battery assembly (1) of the present disclosure includes a first body (110) that forms a receiving space for receiving a plurality of battery cells (10), and a second body (120) that is positioned to face the first body (110) and forms the receiving space together with the first body (110).

[0058] The receiving housing (100) may include a first body (110) and a second body (120). The receiving housing (100) may form a receiving space therein. The receiving space may be formed on the first body (110). A plurality of battery cells (10) may be positioned in the receiving space formed on the upper portion of the first body (110). The first body (110) may have a plate shape with one flat surface. This may improve the structural stability of the battery assembly (1).

[0059] The first body (110) may include a sunken hole (not shown) formed by recessing. The first body (110) may be connected to a structure positioned on the first body (110) through the sunken hole. For example, the side frame (400) described below and the sunken hole of the first body (110) may be connected through a screw connection.

[0060] The first body (110) may include a connecting portion (112a, 112b of FIG. 13). The connecting portion (112a, 112b) may be formed in a structure that protrudes from the first body (110) toward the receiving space. The connecting portion (112a, 112b) may be provided with a recessed hole for screw connection.

[0061] Ultimately, the first body (110) can form one side of the receiving space and can be connected to a structure located on the first body (110) through welding, bonding (brazing), adhesion, or fastening means (e.g., rivets, bolts, nuts).

[0062] Referring to FIG. 1, the second body (120) may be positioned to face the first body (110). In other words, one side of the first body (110) and one side of the second body (120) may be positioned to face each other. For example, referring to FIG. 1, one side of the first body (110) may be positioned to face upward along the Z direction, and one side of the second body (120) may be positioned to face downward along the Z direction.

[0063] The second body (120) can cover a plurality of battery cells (10). The second body (120) can form one side of the receiving space. The first body (110) and the second body (120) can be positioned so as to sandwich a plurality of battery cells (10) therebetween.

[0064] Referring to FIG. 1, the receiving housing (100) may include a third body (130). The third body (130) may connect the first body (110) and the second body (120). The third body (130) may be formed to extend from a corner of the first body (110) toward the receiving space. Consequently, a receiving space may be formed by the first body (110), the second body (120), and the third body (130).

[0065] The first body (110) and the third body (130) may be manufactured as a single unit. However, the first body (110) may be manufactured and then combined with the third body (130). Ultimately, the first body (110) and the third body (130) may be connected to form a hexahedron with one side open. The second body (120) may cover the open side. This allows a receiving space to be formed within the receiving housing (100).

[0066] The battery cell (10) includes an electrode assembly (not shown). The electrode assembly may include a positive electrode, a negative electrode, and a separator. The electrode assembly may be classified into a stacking type, a winding type, a stack-folding type, and a Z-stacking type depending on the method by which the positive electrode, negative electrode, and separator are stacked.

[0067] The battery cell (10) of the present disclosure may include electrode assemblies laminated in various ways without being limited to any one lamination method.

[0068] The positive and negative electrodes may include current collectors. The positive electrode may include a positive current collector, and the negative electrode may include a negative current collector. The current collector may include a known conductive material that does not cause a chemical reaction within a lithium secondary battery.

[0069] For example, the current collector may include any one of stainless steel, nickel (Ni), aluminum (Al), titanium (Ti), copper (Cu), and alloys thereof, and may be provided in various forms such as a film, a sheet, or a foil.

[0070] The positive electrode and the negative electrode may include active materials. The positive electrode may include a positive electrode active material, and the negative electrode may include a negative electrode active material. The positive electrode active material may be a material into which lithium ions can be inserted and deintercalated, and the negative electrode active material may be a material into which lithium ions can be inserted and deintercalated. For example, the positive electrode active material may be a lithium metal oxide, and the negative electrode active material may be a carbonaceous material such as crystalline carbon, amorphous carbon, a carbon composite, or carbon fiber, a lithium alloy, silicon (Si), or tin (Sn).

[0071] Additionally, the positive and negative electrodes may further include a binder and a conductive material, respectively, to improve mechanical stability and electrical conductivity.

[0072] The separator can be configured to prevent electrical short-circuiting between the anode and cathode and to allow ion flow. The type of separator is not particularly limited, but may include a porous polymer film. For example, the separator may include a porous polymer film or a porous nonwoven fabric.

[0073] The electrolyte may include an electrolyte. The electrolyte may be a non-aqueous electrolyte. The electrolyte may include a lithium salt and an organic solvent. The electrolyte may further include an additive. The additive may form a film on the positive or negative electrode through a chemical reaction within the battery. For example, an anode interface film may be formed on the positive electrode, and an anode interface film may be formed on the negative electrode.

[0074] Referring to FIG. 2, the battery cell (10) may further include an outer case (12) that accommodates the electrode assembly therein. The electrode assembly and the electrolyte may be accommodated within the outer case (12). The outer case (12) may include an outer insulating layer made of a polymer material, an inner adhesive layer, and a metal layer interposed between the outer insulating layer and the inner adhesive layer. The outer case (12) may include a material having high mechanical strength to protect the battery cell (10) from external impact. For example, the case may include an aluminum layer.

[0075] Referring to FIG. 2, the battery cell (10) may further include an electrode lead (11) protruding outward from the outer casing (12) for electrical connection to the outside. The electrode lead (11) may be connected to the positive and negative poles of the battery cell (10), respectively. The electrode lead (11) may include a positive tab connected to the positive pole and a negative tab connected to the negative pole.

[0076] In the battery cell (10) according to the present disclosure, the width direction refers to the direction crossing the electrode leads (11) protruding in different directions. The height direction refers to the direction perpendicular to the width direction on the surface where the electrode leads (11) are formed. The thickness direction refers to the direction perpendicular to the width direction and the height direction.

[0077] For example, referring to FIG. 2, the width direction of the battery cell (10) is the Y direction, the height direction is the Z direction, and the thickness direction is the X direction.

[0078] The battery cells (10) may be provided in multiple pieces and stacked along one direction. This may increase the structural stability of the battery assembly (1) and improve the energy density. For example, referring to FIG. 2, the battery cells (10) may be stacked along the X direction. The stacking direction of the battery cells (10) may be defined as the stacking direction, and the stacking direction may be the same as the thickness direction of the battery cells (10).

[0079] FIG. 3 illustrates a cell stack according to one embodiment of the present disclosure.

[0080] The cell stack (20) includes a plurality of battery cells (10). The cell stack (20) may further include a bus bar (22) for electrically connecting the battery cells (10) to each other. The bus bar (22) may connect the electrode leads (11) of the battery cells (10) to each other. The bus bar (22) may be positioned at each end of the battery cell (10).

[0081] In an embodiment, the bus bar (22) may include a slit (22a) formed by opening. The electrode leads (11) of the battery cells (10) may be inserted into each slit. Through this, a plurality of battery cells (10) may be electrically connected to each other. The shape of the bus bar (22) is not limited thereto as long as a plurality of battery cells (10) can be electrically connected.

[0082] The cell stack (20) may further include an insulating cover (23). The insulating cover (23) may electrically insulate a plurality of battery cells (10) from the outside. This may prevent unintended electrical connection of the cell stack (20). In addition, the stability of the battery cells may be improved. The insulating cover (23) may be provided on the outer side of each bus bar (22).

[0083] The cell stack (20) may further include an end plate (21). The end plate (21) can improve the rigidity of the cell stack (20) and protect the cell stack (20) from external pressure, vibration, and impact. The end plate (21) can cover a plurality of battery cells (10).

[0084] The cell stack (20) may further include a sensing assembly (24). The sensing assembly (24) can detect electrical information, including voltage and current, of the battery cell (10) and transmit it to the outside. This can maintain the battery cell (10) in a stable state.

[0085] Referring to FIG. 3, the insulating cover (23), the end plate (21), and the sensing assembly (24) can cover the battery cell (10). That is, the insulating cover (23), the end plate (21), and the sensing assembly (24) can each cover one side of a plurality of battery cells (10).

[0086] FIG. 4 and FIG. 5 illustrate an example of a battery assembly according to an embodiment of the present disclosure, and FIG. 6 illustrates a support frame and a side frame according to an embodiment of the present disclosure.

[0087] Referring to FIGS. 4 and 5, the battery assembly (1) of the present disclosure includes a flow path (330) formed between a plurality of battery cells (10) and a second body (120). Flames or gases generated from the battery cells (10) can move through the flow path (330). In other words, the flow path (330) can form a path through which flames or gases move.

[0088] The euro (330) can prevent flames or gases generated in one battery cell (10) from spreading to another adjacent battery cell (10). This can improve the stability of the battery assembly (1).

[0089] Referring to FIG. 4, the battery assembly (1) of the present disclosure includes a support frame (300). The support frame (300) may be positioned between a plurality of battery cells (10) and a second body (120). The support frame (300) may be positioned between a plurality of battery cells (10) and a second body (120) to support the second body (120).

[0090] The support frame (300) can cover at least a portion of a plurality of battery cells (10). One surface of the support frame (300) can be in contact with a portion of the cell stack (20). In addition, the support frame (300) can be in contact with the second body (120). In other words, the support frame (300) can be positioned between the second body (120) and the cell stack (20). Through this, gas or flame generated from one of the plurality of battery cells (10) can be moved in a preset direction through the path (330).

[0091] To this end, the support frame (300) can be extended along the width direction of a plurality of battery cells (10). This allows the flow path (330) to extend along the width direction, and prevents flames or gases generated from one battery cell (10) from spreading to adjacent battery cells (10).

[0092] The support frame (300) can be positioned between a plurality of battery cells (10) and the second body (120) using a known method. For example, an adhesive can be applied to one surface of the support frame (300) and fixed to the second body (120) using the adhesive.

[0093] The stacking direction of the battery cells can be formed perpendicular to the direction in which the flow path extends. The stacking direction can also be formed perpendicular to the width direction of the battery cells. In other words, the flow path can be arranged parallel to the width direction of the battery cells. This allows flames or gases generated from one battery cell to travel to the flow path located above. This prevents the flame or gases from spreading to adjacent battery cells.

[0094] The battery assembly (1) of the present disclosure may further include a side frame (400) extending from both ends of the support frame toward the first body. The side frame (400) may extend from both ends of the support frame (300) toward the first body (110). To this end, the length of the support frame (300) may be formed to be longer than the length of the battery cell (10) along the width direction of the battery cell (10).

[0095] The side frame (400) can cover the side surface of the cell stack (20). For example, referring to FIGS. 4 and 5, the support frame (300) can cover one surface of the cell stack (20), and the side frame (400) can cover the side surface of the cell stack (20). Consequently, the side frame (400) can be connected to the support frame (300) to form a "U" shape.

[0096] The side frame (400) can be connected to the first body (110). One end of the side frame (00) can be connected to the first body (110). The side frame (400) can be connected to the first body (110) through welding, bonding (brazing), adhesion, or a fastening means.

[0097] As long as the side frame (400) and the first body (110) can be stably connected, the connection method is not particularly limited. The side frame (400) may be formed integrally with the support frame (300), or may be manufactured separately and connected by welding, bonding, or screwing.

[0098] Through this, the support frame and side frame can be stably fixed to the first body.

[0099] For example, referring to FIG. 5, the battery assembly (1) of the present disclosure may further include a fastening portion (350). The fastening portion (350) may connect the side frame (400) and the first body (110). To this end, a through hole (420 in FIG. 6) may be formed at one end of the side frame (400). The fastening portion (350) may be formed as a bolt, and the bolt may be inserted into the through hole (420) to connect the side frame (400) to the first body (110).

[0100] Ultimately, the cell stack (20) can be stably fixed to the first body (110) by the support frame (300) and the side frame (400). In addition, the cell stack (20) can be prevented from being lifted off from the first body due to internal pressure. In addition, even if the cell stack (20) deviates from the preset position and moves toward the second body (120), the impact can be mitigated by the support frame (300).

[0101] The support frame (300) or the side frame (400) may be formed of a metal or plastic material with high mechanical rigidity. For example, the support frame (300) or the side frame (400) may be formed of engineering plastics. Engineering plastics exhibit excellent heat resistance and enhanced mechanical rigidity. Through this, the support frame (300) and the side frame (400) can safely protect the cell stack (20) even in high temperature and high pressure environments.

[0102] The support frame (300) and the side frame (400) may be provided in multiple pieces. The support frame (300) and the side frame (400) may cover an area of ​​the cell stack (20) along the thickness direction of the battery cell (10). For example, referring to FIG. 4, the support frame (300) and the side frame (400) may be arranged at preset intervals along the X direction on the outer surface of the cell stack (20).

[0103] A plurality of support frames (300) and side frames (400) may be provided to form a plurality of paths (330). That is, flame or gas may move through each path (330).

[0104] In addition, the support frame (300) and the side frame (400) can reduce manufacturing costs and improve production efficiency through simple shapes. When manufacturing an integrated structure in which multiple support frames and multiple side frames are connected, the molding process is complicated and difficult, and the manufacturing cost may increase. In contrast, the battery assembly (1) of the present disclosure can simplify the production process and reduce manufacturing costs by manufacturing the support frame (300) and the side frame (400) separately and then arranging them on the outside of the cell stack.

[0105] The battery assembly (1) of the present disclosure may include a predetermined number of support frames (300) and side frames (400) according to the user's settings, taking into account energy density and mechanical rigidity.

[0106] Referring to FIG. 6, the support frame (300) may include a bottom portion (310) and an extension portion (320). The bottom portion (310) may be formed parallel to the first body (110). The extension portion (320) may extend from both ends of the bottom portion (310) toward the first body or the second body (120).

[0107] In the embodiment, referring to FIG. 6, the bottom portion (310) can pressurize the cell stack (20). To this end, the bottom portion (310) can be in contact with at least one surface of the cell stack (20). The bottom portion (310) is in contact with at least one surface of the cell stack (20) and can extend along the width direction of the battery cell (10). The bottom portion (310) can be formed such that the length along the width direction of the battery cell (10) is longer than the length along the thickness direction of the battery cell (10). Side frames (400) can extend from both ends of the bottom portion (310) toward the first body (110). Through this, the bottom portion (310) can press the cell stack (20) toward the first body (110), thereby preventing the cell stack (20) from being lifted.

[0108] The extension portion (320) may extend from both ends of the bottom portion (310) toward the second body (120). Referring to FIG. 4, the extension portion (320) may extend from the bottom portion (310) in the Z direction. The cell stack (20) and the second body (120) may be separated by the extension portion (320) to form a space. A path (330) may be formed in the space thus formed, allowing gas or flame to move.

[0109] The extension (320) can be in contact with the second body (120). This can prevent flame or gas from spreading from one of the plurality of paths (330) to another path (330).

[0110] The extension (320) may be formed parallel to the second body (120) by bending one end. This is to reduce the impact received by the extension (320). In other words, the area of ​​contact between the extension (320) and the second body (120) can be increased, thereby reducing pressure.

[0111] In another embodiment, the cross-section of the flow path (330) may form a closed curve. That is, the extension portions (320) extending from both ends of the bottom portion (310) may be connected to each other. This allows gas located in the flow path to be efficiently discharged.

[0112] In another embodiment, the extension portion (320) may extend from the bottom portion (310) toward the first body. The extension portion (320) and the bottom portion (310) may be connected to form a "U" shape that is open toward the first body (110). At this time, one end of the extension portion (320) may be bent to be formed parallel to the first body. Through this, the support frame is stably positioned above the plurality of battery cells, and the gas discharged from the battery cells (10) can efficiently move through the passage.

[0113] The support frame (300) may further include a buffer member (340). The buffer member (340) may be positioned at one end of the extension portion (320). In one embodiment, the buffer member (340) may be provided at a free end of the extension portion (320). Among the two ends of the extension portion (320), a portion extending from the bottom portion (310) refers to a fixed end of the extension portion (320). The free end of the extension portion (320) refers to an area located opposite the fixed end of the extension portion (320).

[0114] For example, referring to FIG. 5, the free end of the extension (320) means the end of the extension (320) facing the second body (120). The shock received by the extension (320) from the second body (120) can be minimized by the buffer member (340).

[0115] In another embodiment, when the extension (320) and the bottom (310) are connected to form a “U” shape that is open toward the first body (110), the free end of the extension (320) means the end of the extension (320) that faces the first body (110). This can alleviate the impact between the extension (320) and the plurality of battery cells (10).

[0116] As long as the impact can be minimized, the material of the buffer member (340) is not particularly limited. For example, the buffer member (340) may include at least one material among rubber and foam plastic.

[0117] Referring to Fig. 6, the bottom portion (310) may further include a bottom hole (311) that is connected to the flow path (330). Flames or gases generated in the cell stack (20) may be transmitted to the flow path (330) through the bottom hole (311). A plurality of bottom holes (311) may be provided.

[0118] The side frame (400) may further include a side hole (410) formed by penetrating through it. The side hole (410) may be formed by penetrating a portion of the side frame (400). Flames or gases generated in the cell stack (20) may be discharged to the receiving space through the side hole (410).

[0119] The flow path (330) may be formed in a channel shape. The flow path (330) may be formed in a channel shape that extends in the width direction of the battery cell. For example, referring to FIG. 6, the flow path may extend along the Y direction. The flow path (330) may be opened at both ends to allow flames and gases to be discharged. Through this, flames and gases generated in the cell stack (20) may be discharged to the outside.

[0120] In another embodiment, the cross section of the euro (330) may be formed as a closed curve.

[0121] Figures 7 to 9 illustrate various embodiments of the support frame of the present disclosure. The flow path (330) may be formed by a bottom portion (310), an extension portion (320), and a second body (120). The bottom portion (310) may form the bottom surface of the flow path (330). The extension portion (320) may form the side surface of the flow path (330).

[0122] The extension portion (320) may extend to form an incline with the bottom portion (310). The extension portion (320) may have a predetermined curvature and may extend from the bottom portion (310) toward the second body (120). Through this, the structural stability of the support frame (300) located between the cell stack (20) and the second body (120) may be improved.

[0123] Referring to Fig. 7, the extension portion (320a) may extend vertically from the bottom portion (310). In addition, one end of the extension portion (320a) may be bent toward the outside of the flow path (330). Referring to Fig. 8, the extension portion (320b) may form an incline with the bottom portion (310). One end of the extension portion (320b) may be bent toward the inside of the flow path (330). Through this, the impact received by the extension portion (320) may be minimized.

[0124] Referring to Fig. 9, the extension portion (320c) can be extended while forming an incline with the bottom portion (310). While maintaining the spaced apart position of the cell stack (20) and the second body (120), the space of the flow path (330) can be minimized through the incline. This reduces the volume of the battery assembly (1), thereby improving the energy density. In addition, even if the impact received by the extension portion (320) increases, damage to the extension portion (320) can be prevented due to the incline structure.

[0125] FIGS. 10 to 12 illustrate a modular laminate according to one embodiment of the present disclosure.

[0126] The module stack (30) may include a cell stack (20) and a module cover (500). The module cover (500) may accommodate a plurality of battery cells (10). The module cover (500) may accommodate a cell stack (20) therein. The module cover (500) may be positioned within a housing (100) to accommodate the cell stack (20) therein. The module cover (500) may protect the cell stack (20) from external impact. The module cover (500) may be coupled with the first body (110) to fix the position of the cell stack (20).

[0127] Ultimately, the module cover (500) can cover the cell stack (20) positioned on the first body (110) and protect the cell stack (20). The support frame (300) can be positioned between the module cover (500) and the second body (120). Through this, the module cover (500) and the second body (120) can be spaced apart to form a flow path (330).

[0128] Referring to FIG. 10, the module cover (500) may include a cover body (510) and a side body (520).

[0129] The cover body (510) can cover a plurality of battery cells (10). The cover body (510) can cover at least one surface of the cell stack (20). The cover body (510) can include a cover hole (511) formed through the cover body. Flame or gas of the cell stack (20) can move to the flow path (330) through the cover hole (511). The cover body (510) can be positioned between the cell stack (20) and the second body (120).

[0130] The side body (520) may extend from both ends of the cover body (510) toward the first body (110). The side body (520) may extend downward from both corners of the cover body (510) provided parallel to the thickness direction of the battery cell (10).

[0131] The side body (520) can be coupled with the first body (110). As long as the side body (520) can be stably coupled, the coupling method is not particularly limited. For example, the side body (520) can be coupled with the first body (110) by welding, bonding, or screw coupling.

[0132] The side body (520) may be provided with one end bent and parallel to the first body (110). This is to alleviate the impact received by the side body (520). For example, one end of the side body (520) may be provided as a flange.

[0133] The side body (520) can pressurize the first body (110). At this time, the contact area of ​​the side body (520) can be increased to reduce the impact.

[0134] Referring to FIG. 10, the module cover (500) may further include a low cover (530). The low cover (530) may be positioned on the first body (110). The low cover (530) may be coupled to the side body (520). The low cover (530) may define a space where the cell stack (20) is positioned on the first body (110).

[0135] The low cover (530) may extend along the thickness direction of the battery cell (10) on the first body (110). The low cover (530) may be provided at each of the two corners of the cell stack (20). The low cover (530) may extend on the first body (110) and be provided in a form in which one end is bent.

[0136] Referring to Fig. 11, the module cover (500) can cover the outer surface of the cell stack (20). Referring to Fig. 12, at least one surface of the module cover (500) can be opened. For example, the bottom surface of the module cover (500) can be opened. Through this, the first body (110) and the cell stack (20) can come into contact. In other words, a plurality of battery cells (10) can come into contact with the first body (110). Through this structure, the battery assembly (1) can be lightweight and the cooling effect can be maximized.

[0137] FIG. 13 illustrates a battery assembly according to another embodiment of the present disclosure.

[0138] The modular stack (30) may be positioned on the first body (110). The first body (110) may be a cooling plate. The first body (110) may include a cooling path (not shown) through which a coolant can move. Through this, the first body (110) may cool the modular stack (30).

[0139] The battery assembly (1) of the present disclosure may further include a heat-conducting portion (111) positioned between the first body (110) and the plurality of battery cells (10). The heat-conducting portion (111) may be applied on the first body (110) or may be provided in the form of a thin sheet and coupled to the first body (110). For example, the heat-conducting portion may include silicon. The type of the heat-conducting portion (1110) is not particularly limited as long as it can efficiently transfer heat between the first body (110) and the plurality of battery cells (10).

[0140] Ultimately, the cell stack (20) can be covered by the module cover (500), the support frame (300d), and the side frame (400d). The module cover (500) can primarily cover the cell stack (20). In other words, the support frame (300d) can cover the cover body (510) of the module cover (500), and the side frame (400d) can cover the side body (520) of the module cover (500).

[0141] Referring to FIG. 11, the side body (520) may include a connecting hole (521). The connecting hole (521) may be formed by penetrating the side body (520). The side body (520) may be connected to the first body (110) through the connecting hole (521). As described above, the side frame (400d) may include a through hole (420d). The connecting hole (521) may be positioned to overlap the through hole (420d).

[0142] Referring to Fig. 13, the side frame (400d) and the side body (520) can be connected together to the first body (110) through the through hole (420d) and the connecting hole (521). Through this, the cell stack (20) can be prevented from lifting, and the structural stability of the battery assembly (1) can be improved.

[0143] FIG. 14 illustrates a bulkhead according to one embodiment of the present disclosure, and FIG. 15 illustrates a bulkhead according to another embodiment of the present disclosure.

[0144] The support frame (300) of the present disclosure may further include a bulkhead (360, 360a).

[0145] The bulkhead (360) extends from the bottom portion (310) toward the first body or the second body and may be positioned between the extension portions (320). The bulkhead (360) may be damaged or deformed due to the pressure of the flame or gas discharged toward the bottom hole (311). For example, the bulkhead (360) may bend upward or be distorted. This may affect adjacent cells and degrade the performance of the battery cell.

[0146] By forming a partition wall (360) on the bottom portion (310), damage to the support frame (300) can be prevented. The partition wall (360) can extend from the bottom portion (310) toward the first body or the second body. That is, the partition wall (360) can be formed by protruding or extending from the bottom portion (310) toward the Z-axis direction. Due to this structure, even if a high pressure is applied to the support frame (300) in a direction parallel to the Z-axis direction, deformation of the shape can be minimized.

[0147] The bulkhead (360) may be welded or screw-connected to the bottom (310), but the method of connection is not particularly limited.

[0148] The bulkhead (360) may be formed along one direction in which the flow path (330) is formed. Referring to FIG. 14, the flow path (330) may extend along the Y-axis direction. For example, the bulkhead (360) may be formed between the extension portions (320) along a direction parallel to each extension portion (320).

[0149] Additionally, the bulkhead (360) may be formed in one direction and another direction to block the path of the flow path (330). For example, the bulkhead (360) may be formed in a direction perpendicular to the one direction. Referring to FIG. 15, the bulkhead (360a) may be formed along the X-axis direction to block the path of the flow path (330).

[0150] A partition wall (360a) may be formed between one end and the other end of the flow path (330). Preferably, the partition wall (360a) is formed midway between one end and the other end of the flow path (330). This allows the partition wall (360a) to divide the flow path (330) into two regions. In other words, the partition wall (360a) can block the transmission of gas or flame between the two regions.

[0151] Both ends of the partition wall (360a) can be in contact with the extension portion (320), respectively. When the partition wall (360a) is formed in one direction and the other direction, the flow of fluid through the flow path (330) can be completely blocked by both ends being in contact with the extension portion (320). Referring to Fig. 15, the partition wall (360a) is formed perpendicular to the direction in which the flow path (330) extends between the extension portions (320), and the partition wall (360) can be in contact with each of the extension portions (320). As a result, the flow of fluid through the flow path (330) can be blocked.

[0152] The present disclosure may be implemented in various forms and modifications, and the scope of the invention is not limited to the embodiments described above. Therefore, if a modified embodiment includes elements of the claims of the present disclosure, it should be considered to fall within the scope of the present disclosure.

Claims

1. Multiple battery cells arranged in a stacked manner; A first body forming a receiving space for receiving the plurality of battery cells; A second body positioned to face the first body and forming the receiving space together with the first body; and A battery assembly comprising a support frame including a path extending in one direction and positioned between the plurality of battery cells and the second body.

2. In paragraph 1, The above support frame A bottom portion formed parallel to the first body; and A battery assembly including an extension portion extending from both ends of the bottom portion toward the first body or the second body.

3. In paragraph 2, A battery assembly in which the above extension part is formed in parallel with the first body or the second body by bending one end.

4. In paragraph 2, A battery assembly in which the above extension portion forms an incline with the above floor portion and extends.

5. In paragraph 2, The above-mentioned euro is a battery assembly formed in a channel shape.

6. In paragraph 2, A battery assembly wherein the support frame further includes a buffer member positioned at one end of the extension portion.

7. In paragraph 2, The above extension is a battery assembly that comes into contact with the second body.

8. In paragraph 2, A battery assembly wherein the bottom part further includes a bottom hole communicating with the euro.

9. In paragraph 1, A battery assembly further comprising a side frame extending from both ends of the support frame toward the first body.

10. In paragraph 9, A battery assembly in which one end of the above side frame is connected to the first body.

11. In paragraph 9, A battery assembly further comprising a side hole formed by penetrating the side frame.

12. In paragraph 1, A battery assembly in which the stacking direction in which the plurality of battery cells are stacked is formed perpendicular to one direction in which the euro extends.

13. In paragraph 1, Further comprising a module cover positioned inside the above-mentioned receiving space and accommodating the plurality of battery cells; The above support frame is a battery assembly located between the module cover and the second body.

14. In paragraph 13, The above module cover is a cover body that covers the plurality of battery cells and includes a cover hole formed through the cover body; and A battery assembly including a side body extending from both ends of the cover body toward the first body.

15. In paragraph 14, The above side body is a battery assembly that is combined with the above first body.

16. In paragraph 14, The above side body is a battery assembly in which one end is bent and arranged parallel to the first body.

17. In paragraph 16, Further comprising a side frame extending from both ends of the support frame toward the first body, wherein the side frame includes a through hole at one end, and the side body includes a connecting hole positioned to overlap the through hole at one end, A battery assembly in which the side frame and the side body are connected together to the first body through the through hole and the connecting hole.

18. In paragraph 1, A battery assembly in which the plurality of battery cells are in contact with the first body.

19. In paragraph 1, A battery assembly further comprising a heat-conducting portion positioned between the first body and the plurality of battery cells.

20. Multiple battery cells arranged in a stacked manner; A first body forming a receiving space for receiving the plurality of battery cells; A second body positioned to face the first body, forming the receiving space together with the first body, and spaced apart from the plurality of battery cells; and A battery assembly including a path formed between the plurality of battery cells and the second body.

21. In paragraph 2, A battery assembly further comprising a bulkhead extending from the bottom portion toward the first body or the second body and positioned between the extension portions.

22. In paragraph 21, The above bulkhead is a battery assembly formed along the above one direction.

23. In paragraph 21, A battery assembly in which the above bulkhead is formed along a direction different from the above one direction to block the path of the above flow.

24. In paragraph 23, A battery assembly in which both ends of the above bulkhead are in contact with the above extension.

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