Battery module with reinforced safety

Abstract

The present invention discloses a battery module with enhanced safety. A battery module according to one aspect of the present invention comprises: a plurality of battery cells stacked in at least one direction; a module case that accommodates the plurality of battery cells in an internal space; and a heat dissipation member interposed between at least some of the plurality of battery cells, wherein at least a portion thereof is in contact with the module case to transfer heat generated from the plurality of battery cells to the module case.

Description

Technology Field

[0001] The present invention relates to a battery, and more specifically, to a battery module with enhanced safety, a battery pack including the same, and an automobile, etc. Background Technology

[0002] As the demand for portable electronic products such as smartphones, tablet PCs, and smartwatches increases significantly and electric vehicles become increasingly widespread, research on batteries installed in them, particularly secondary batteries capable of repeated charging and discharging, is actively underway.

[0003] Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density.

[0004] Lithium secondary batteries primarily use lithium-based oxides and carbon materials as positive and negative active materials, respectively. A lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with these positive and negative active materials, are arranged with a separator in between, and an outer casing, namely a battery case, that seals and houses the electrode assembly together with an electrolyte.

[0005] Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet.

[0006] Recently, secondary batteries are widely used for driving or energy storage not only in small devices such as portable electronic devices but also in medium-to-large devices such as electric vehicles and Energy Storage Systems (ESS). These secondary batteries can form a single battery module by housing multiple batteries together inside a module case while electrically connected. Furthermore, multiple such battery modules can be connected to form a single battery pack.

[0007] However, when multiple secondary batteries (battery cells) or battery modules are densely packed in a confined space as described above, they may be vulnerable to thermal events. In particular, if an event such as thermal runaway occurs in a single battery cell, problems may arise where this event propagates to other battery cells. If such thermal propagation occurs, it can cause serious issues, such as fire or explosion, within the affected battery module. Furthermore, if multiple battery modules are contained within a higher-level device, such as a battery pack, battery rack, or power storage unit, problems like fire or explosion can spread to other battery modules contained within that higher-level device.

[0008] Furthermore, in the case of medium-to-large battery modules or battery packs, such as those in electric vehicles, the risk of thermal chain reactions can be even greater because a large number of battery cells are included to increase output and / or capacity. Additionally, in the case of battery packs installed in electric vehicles, users such as drivers may be present nearby. Therefore, if a thermal event occurring in a specific battery module is not properly controlled and a chain reaction occurs, it can result in significant property damage as well as loss of life. The problem to be solved

[0009] Accordingly, the present invention is devised to solve the above-mentioned problems and aims to provide a battery module capable of suppressing thermal events that may occur inside the battery module and enhancing safety, as well as a battery pack including the same and an automobile, etc.

[0010] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by those skilled in the art from the description of the invention below. means of solving the problem

[0011] A battery module according to one aspect of the present invention for achieving the above-mentioned purpose comprises: a plurality of battery cells stacked in at least one direction; a module case that accommodates the plurality of battery cells in an internal space; and a heat dissipation member interposed between at least some of the plurality of battery cells, wherein at least a portion thereof is in contact with the module case to transfer heat generated from the plurality of battery cells to the module case.

[0012] Here, the heat dissipation member may be configured such that at least one end is inserted into the module case.

[0013] In addition, the heat dissipation member may be configured such that both ends located on opposite sides are inserted into the module case.

[0014] In addition, the heat dissipation member may comprise a main body portion configured in a plate shape, and an extension portion provided at least one end of the main body portion and configured to be thicker than the main body portion.

[0015] In addition, the above extension may be configured to allow the battery cell to be seated.

[0016] In addition, at least a portion of the extension can be inserted into the interior of the module case.

[0017] In addition, the above-mentioned extension may be formed such that at least a portion of it becomes thicker towards the end.

[0018] In addition, the extension portion may be formed at two or more different ends of the main body portion, and the two or more extension portions may be composed of different materials.

[0019] In addition, the extension part may be configured to be detachable from the main body part.

[0020] In addition, the battery module according to the present invention further includes a cooling member configured to be located outside the module case and to absorb heat transferred to the module case and release it to the outside, and the heat dissipation member may have the extension portion at the end of the portion where the cooling member is located.

[0021] In addition, the above extension may have irregularities formed on the surface in contact with the module case.

[0022] The above heat dissipation members are included in a plurality along the stacking direction of the plurality of battery cells, and at least two of the plurality of heat dissipation members may be configured in different shapes.

[0023] In addition, a battery pack according to another aspect of the present invention for achieving the above-mentioned purpose includes a battery module according to the present invention.

[0024] In addition, an automobile according to another aspect of the present invention for achieving the above-mentioned purpose includes a battery module according to the present invention. Effects of the invention

[0025] According to the present invention, effective control of thermal events occurring inside a battery module is possible.

[0026] In particular, according to one aspect of the present invention, when a thermal event occurs in a specific battery cell, it is possible to efficiently prevent the propagation of the thermal event to another battery cell.

[0027] In addition, according to one embodiment of the present invention, control of the direction of heat movement within the battery module may be possible.

[0028] In addition, according to one aspect of the present invention, heat generated from a battery cell can be cooled more smoothly.

[0029] In addition to the above, the present invention may have various other effects, which are described in each embodiment, or effects that can be easily inferred by those skilled in the art, etc., will be omitted. Brief explanation of the drawing

[0030] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a combined perspective view schematically showing the configuration of a battery module according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of the battery module of FIG. 1. Figure 3 is a cross-sectional view along the line A1-A1' of Figure 1. FIG. 4 is a partially enlarged cross-sectional view schematically showing a part of the configuration of a battery module according to another embodiment of the present invention. FIG. 5 is a partially enlarged cross-sectional view schematically showing another part of the configuration of a battery module according to another embodiment of the present invention. FIG. 6 is a perspective view schematically showing the configuration of a heat dissipation member according to another embodiment of the present invention. FIG. 7 is a schematic diagram showing a part of the configuration of a battery module to which the heat dissipation member of FIG. 6 is applied. FIG. 8 is a perspective view schematically showing the configuration of a heat dissipation member according to another embodiment of the present invention. FIG. 9 is an enlarged view of a part of the configuration in which the heat dissipation member of FIG. 8 is interposed between battery cells. FIG. 10 is a diagram schematically showing a part of the configuration of a battery module according to another embodiment of the present invention. FIG. 11 is a diagram schematically showing the configuration of a heat dissipation member according to another embodiment of the present invention. FIG. 12 is a diagram schematically showing a part of the configuration of a battery module according to another embodiment of the present invention. FIG. 13 is a perspective view schematically showing the configuration of a heat dissipation member according to another embodiment of the present invention. FIG. 14 is a schematic diagram showing a part of the configuration of a battery module to which the heat dissipation member of FIG. 13 is applied. FIG. 15 is a perspective view schematically showing the configuration of a heat dissipation member according to another embodiment of the present invention. FIG. 16 is a cross-sectional view schematically showing a part of the configuration of a battery module according to another embodiment of the present invention. Specific details for implementing the invention

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0032] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0034] FIG. 1 is an assembled perspective view schematically showing the configuration of a battery module according to one embodiment of the present invention, and FIG. 2 is an exploded perspective view of the battery module of FIG. 1. Also, FIG. 3 is a cross-sectional view along the line A1-A1' of FIG. 1.

[0035] Referring to FIGS. 1 to 3, the battery module according to the present invention includes a battery cell (100), a module case (200), and a heat dissipation member (300).

[0036] The above battery cells (100) may be included in a plurality in a battery module. Each battery cell (100) may represent a secondary battery. A secondary battery may comprise an electrode assembly (including a positive plate, a negative plate, and a separator), an electrolyte, and a battery case. A plurality of battery cells (100) may be electrically connected to one another. For example, a plurality of battery cells (100) may be electrically connected to one another in series and / or parallel via a busbar, etc.

[0037] A plurality of battery cells (100) may be included in a battery module in a stacked form. That is, the battery cells (100) according to the present invention may be said to have a cell stack (cell assembly) in a stacked form in at least one direction. For example, as shown in FIG. 2, a plurality of battery cells (100) may be arranged side by side in the left-right direction (Y-axis direction).

[0038] The module case (200) may be configured to have an empty space formed inside and to accommodate a plurality of battery cells (100) in this internal space. For example, the module case (200) may include a main body frame (210) and an end frame (220). Here, the main body frame (210) may have a top plate, a bottom plate, a left plate, and a right plate to form a storage space, and a stack of battery cells (100) may be accommodated in this storage space. Additionally, the end frame (220) may be configured to be coupled to the main body frame (210) to cover the open portion of the main body frame (210). More specifically, the main body frame (210) may be configured to have an open front and rear, and the end frame (220) may be configured to be coupled to the open portions of the main body frame (210) at the front and rear.

[0039] The heat dissipation member (300) may be interposed between at least some of the battery cells (100) among the plurality of battery cells (100). That is, the heat dissipation member (300) may be configured to be interposed within the cell stack housed in the module case (200), particularly between two adjacent battery cells (100). Furthermore, as shown in FIGS. 2 and 3, the heat dissipation member (300) may be included in a plurality in a single battery module. At this time, the plurality of heat dissipation members (300) may be arranged so as to be spaced apart from each other by a predetermined distance in the stacking direction (Y-axis direction of the drawing) of the battery cells (100). Also, one or more battery cells (100) may be interposed between two adjacent heat dissipation members (300).

[0040] The heat dissipation member (300) may be configured such that at least a portion of it contacts the module case (200). In particular, the heat dissipation member (300) may have at least one end contacting the module case (200). For example, the heat dissipation member (300) may be configured such that its lower end contacts the module case (200), as indicated by B1 in FIG. 3. Alternatively, the heat dissipation member (300) may be configured such that its upper end contacts the module case (200), as indicated by B2 in FIG. 3.

[0041] The heat dissipation member (300) may be configured to transfer heat generated from a plurality of battery cells (100) to a module case (200). That is, the heat dissipation member (300) can absorb the generated heat when heat is generated from any of the battery cells (100) among the plurality of battery cells (100). Then, the heat dissipation member (300) can transfer the heat absorbed in this way to the module case (200). In particular, the heat dissipation member (300) can transfer heat to the module case (200) through a portion in contact with the module case (200). And, the heat transferred to the module case (200) in this way can be discharged to the outside of the module case (200).

[0042] According to this embodiment of the present invention, in a battery module containing a plurality of battery cells (100) inside, if a thermal event such as thermal runaway occurs from a specific battery cell (100), it is possible to prevent or reduce the propagation of such thermal event to other battery cells (100) inside the battery module. Furthermore, according to the above embodiment, phenomena such as thermal runaway propagation inside the battery module can be prevented. In addition, according to the above embodiment, heat generated from the battery cell (100) can be smoothly and quickly discharged to the outside through the heat dissipation member (300) and the module case (200). Thus, a battery module with excellent cooling performance can be provided.

[0043] Additionally, the heat dissipation member (300) may also be provided on the outer side of the cell stack, as shown in FIGS. 2 and 3. That is, the heat dissipation member (300) may be interposed between the outermost battery cell (100) of the cell stack and the module case (200). More specifically, referring to the configuration shown in FIG. 2, the heat dissipation member (300) may be provided on the left and right sides of the cell stack in which a plurality of battery cells (100) are stacked in the left-right direction (Y-axis direction).

[0044] According to this embodiment, not only is the cooling performance of the battery module further improved, but the propagation of heat or flame to other components outside the battery module, such as other battery modules or control units like a Battery Management System (BMS), can also be suppressed.

[0045] The module case (200) and / or the heat dissipation member (300) may include a material with high thermal conductivity to absorb and transfer heat generated from the battery cell (100). In particular, the module case (200) and / or the heat dissipation member (300) may be made of a material that does not soften or melt even at high temperatures, such as 1000°C or higher, or may be configured to include such a material. Typically, the module case (200) and / or the heat dissipation member (300) may include a metal material. As a more specific example, the module case (200) and / or the heat dissipation member (300) may be composed of SUS (stainless steel) or a composite material including it. In the case of such SUS material, the possibility of softening or melting due to high temperatures is lower compared to metals such as aluminum. Therefore, in situations such as thermal runaway, the problem of the structure of the module case (200) or the heat dissipation member (300) collapsing and safety being reduced can be more effectively prevented. In addition, the module case (200) and / or the heat dissipation member (300) may be made of or include other metal materials that have high thermal conductivity and do not soften or melt at high temperatures.

[0046] According to this embodiment of the present invention, high-temperature durability of the module case (200) and the heat dissipation member (300) can be ensured. Therefore, even if a high-temperature situation occurs inside the battery module due to thermal runaway, softening or melting of the heat dissipation member (300) or the module case (200) can be prevented. Consequently, structural collapse of the heat dissipation member (300) or the module case (200) can be prevented, thereby further enhancing the safety of the battery module.

[0047] The heat dissipation member (300) may be configured such that at least one end is inserted into the module case (200). This will be explained in more detail with reference to FIG. 4, etc.

[0048] FIG. 4 is a partial enlarged cross-sectional view schematically illustrating a part of the configuration of a battery module according to another embodiment of the present invention. For example, FIG. 4 can be considered a variation of part B1 of FIG. 3. Meanwhile, various embodiments are described in this specification, including the present embodiment. Detailed descriptions are omitted for parts where the description of other embodiments can be applied identically or similarly to the corresponding embodiment, and the description focuses on the parts where there are differences between each embodiment.

[0049] Referring to FIG. 4, the lower end of the heat dissipation member (300) can be configured to be inserted into the module case (200). To this end, a lower insertion groove may be formed on the lower inner surface of the module case (200), as indicated by the part G1 in FIG. 4. Then, the lower end of the heat dissipation member (300) can be inserted into the lower insertion groove (G1) of the module case (200).

[0050] According to this embodiment of the present invention, the fixing force of the heat dissipation member (300) inside the battery module can be improved. Therefore, even when vibration or shock is applied to the battery module, the position of the heat dissipation member (300) can be stably maintained due to the insertion coupling configuration between the heat dissipation member (300) and the module case (200). Consequently, the movement of the battery cell (100) inside the battery module is prevented, and the stacking state of the cell stack can be stably maintained. In addition, when a situation such as thermal runaway occurs, gas may be generated from a specific battery cell (100), and even if the pressure of the generated gas is applied to the heat dissipation member (300), the heat dissipation member (300) can be prevented from moving.

[0051] Furthermore, according to the above embodiment, by means of an insertion configuration between the heat dissipation member (300) and the module case (200), the transmission of flames or gases between the spaces separated by the heat dissipation member (300) can be more effectively prevented. In addition, according to the above embodiment, since the contact area between the heat dissipation member (300) and the module case (200) is increased, the heat transfer performance from the heat dissipation member (300) to the module case (200) can be increased.

[0052] Additionally, the heat dissipation member (300) may be configured such that both ends located on opposite sides are inserted into the module case (200). This will be explained in more detail with additional reference to FIG. 5 in conjunction with FIG. 4.

[0053] FIG. 5 is a partial enlarged cross-sectional view schematically showing another part of the configuration of a battery module according to another embodiment of the present invention. For example, FIG. 5 can be described as a variation of part B2 of FIG. 3.

[0054] Referring to FIG. 5, the upper end of the heat dissipation member (300) can be inserted into the interior of the module case (200). In particular, an upper insertion groove may exist on the upper inner surface of the module case (200), such as the part marked G2. And, the upper end of the heat dissipation member (300) can be inserted into the upper insertion groove (G2) of the module case (200).

[0055] In particular, the configuration shown in FIG. 5 and the configuration shown in FIG. 4 may be included for a single battery module. That is, the heat dissipation member (300) may be configured such that two ends located on opposite sides, namely the lower end and the upper end, are both inserted into the module case (200).

[0056] According to this embodiment of the present invention, the fixing force of the heat dissipation member (300) is further improved, so that the position of the heat dissipation member (300) can be stably maintained even with external shocks, vibrations, internal fires, or gases. In addition, as a result, a cell stack having a plurality of battery cells (100) can be stably maintained at a constant position or spacing. Furthermore, according to the above embodiment, gas or flames are prevented from leaking out through the gap between the heat dissipation member (300) and the inner surface of the module case (200), thereby more reliably preventing the propagation of heat or flames between the battery cells (100). In addition, in the above embodiment, the heat transfer performance can be further improved by increasing the contact area between the heat dissipation member (300) and the module case (200).

[0057] The above module case (200) may be configured in a monoframe form for at least a portion. In particular, the above module case (200) may include a main body frame (210) and an end frame (220), and the main body frame (210) may be configured in a monoframe form. In this case, the main body frame (210) may have a top plate, a bottom plate, a left plate, and a right plate, and the top plate, bottom plate, left plate, and right plate may be manufactured in an integrated form. That is, the main body frame (210) may be formed in the shape of a square tube with a hollow formed inside. Also, the front and rear of the main body frame (210) may be configured in an open form.

[0058] In particular, as in the embodiment of FIGS. 3 to 5, in the case of an embodiment in which the lower end and the upper end of the heat dissipation member (300) are inserted into the module case (200), the module case (200) may be provided with a monoframe. Furthermore, a lower insertion groove (G1) and an upper insertion groove (G2) are formed on the upper surface of the lower plate and the lower surface of the upper plate of the monoframe, respectively, so that the lower end and the upper end of the heat dissipation member (300) can be inserted. In this case, the heat dissipation member (300), while fitted into the lower insertion groove (G1) and the upper insertion groove (G2), can be inserted into the interior of the monoframe in a sliding manner through an open portion at the front or rear of the monoframe. According to this embodiment of the present invention, the assembly process of inserting the heat dissipation member (300) into the interior of the module case (200) and further fitting the heat dissipation member (300) into the insertion groove of the module case (200) can be performed more smoothly. In addition, according to the above embodiment, since the gap between the upper plate and the lower plate of the module case (200) is maintained at a constant level, the position of the heat dissipation member (300) can be maintained more stably.

[0059] FIG. 6 is a perspective view schematically showing the configuration of a heat dissipation member (300) according to another embodiment of the present invention, and FIG. 7 is a diagram schematically showing a part of the configuration of a battery module to which the heat dissipation member (300) of FIG. 6 is applied. In FIG. 7, for convenience of explanation, two battery cells (100) and one heat dissipation member (300) interposed between them are shown as the focus.

[0060] Referring to FIGS. 6 and 7, the heat dissipation member (300) may comprise a main body portion (310) and an extension portion (320). Here, the main body portion (310) may be configured in a plate shape. For example, the main body portion (310) may be configured in the form of a plate standing vertically and interposed between two battery cells (100) arranged horizontally. Additionally, the extension portion (320) may be provided at at least one end of the main body portion (310) and configured to be thicker than the main body portion (310). For example, the extension portion (320) may be provided at the top and bottom of the main body portion (310) and configured to extend horizontally, such as in the left-right direction (Y-axis direction of the drawing), beyond the main body portion (310). That is, the extension portion (320) may be formed with a thickness greater in the left-right direction than the main body portion (310).

[0061] In particular, in the heat dissipation member (300), the plate-shaped main body (310) may be interposed between the battery cells (100), and the extension (320) may be located in a portion that is separated from the space between the battery cells (100). Furthermore, a plurality of battery cells (100) may be pouch-type batteries. In the case of such pouch-type batteries, an electrode assembly and an electrolyte may be stored in the central portion to form a storage portion (C1), and a pouch outer material may be sealed around the edge of the storage portion (C1) to form a sealing portion (C2). At this time, the main body (310) of the heat dissipation member (300) may be interposed between the storage portion (C1) of the pouch-type battery, and the extension (320) of the heat dissipation member (300) may be located in a portion other than the storage portion (C1) of the pouch-type battery, particularly between the sealing portion (C2) of the pouch-type battery. Since the space between the sealing portions (C2) of adjacent pouch-type batteries is formed wider than the space between the storage portions (C1), a thick extension portion (320) can be located.

[0062] Additionally, the extension portion (320) may be formed in the portion of the heat dissipation member (300) that contacts the module case (200). For example, as shown in FIG. 7, the upper and lower portions of the heat dissipation member (300) may contact the module case (200), and the extension portion (320) may be located at the upper and lower portions of the heat dissipation member (300). In this case, it can be said that the extension portion (320) of the heat dissipation member (300) contacts the module case (200).

[0063] According to this embodiment of the present invention, heat dissipation performance through the heat dissipation member (300) can be improved without widening the space between the cell stacks. In particular, in the above embodiment, the contact area between the heat dissipation member (300) and the module case (200) can be increased through the expansion portion (320). Accordingly, heat transfer performance from the heat dissipation member (300) to the module case (200) can be improved. Furthermore, according to the above embodiment, due to the increased contact area between the heat dissipation member (300) and the module case (200), the shape or position of the heat dissipation member (300), particularly the upright state of the heat dissipation member (300), can be maintained more stably inside the module case (200).

[0064] In addition, according to the above embodiment, the performance of suppressing heat or flame transfer between cells can be further improved. For example, when pouch-type batteries form a laminate and are included in a battery module, high-temperature gas or flame emitted from the battery cells (100) may be located in the space between the sealing portions (C2), which is a relatively wide space inside the module case (200). At this time, since a thickly formed extension portion (320) is located in the space between the sealing portions (C2), the space between the sealing portions (C2) between cells can be more clearly distinguished. Therefore, the transfer of heat or flame between cells through the space where the sealing portions (C2) are formed can be prevented more effectively.

[0065] The above extension portion (320) may be configured to allow a battery cell (100) to be seated thereon. For example, referring to the configuration illustrated in FIGS. 6 and 7, the heat dissipation member (300) may have a seating part formed in the lower extension portion (320) so that a battery cell (100) can be seated thereon, such as the part marked M1. Furthermore, since a battery cell (100) may be positioned on the left and right sides of the heat dissipation member (300), separate seating parts (M1) may be formed on the left and right sides of the lower extension portion (320) of the heat dissipation member (300). Then, a left battery cell (100) and a right battery cell (100) may be seated on these seating parts (M1), respectively.

[0066] In particular, as illustrated in FIG. 7, when the battery cell (100) is a pouch-type battery, the storage portion (C1) of the pouch-type battery can be seated in the seating portion (M1) formed in the extension portion (320) of the heat dissipation member (300). That is, in the configuration of FIG. 7, the storage portion (C1) of the left battery cell (100), specifically the lower right portion of the storage portion (C1), can be seated in the left seating portion (M1) of the heat dissipation member (300). Additionally, in the configuration of FIG. 7, the storage portion (C1) of the right battery cell (100), specifically the lower left portion of the storage portion (C1), can be seated in the right seating portion (M1) of the heat dissipation member (300).

[0067] According to this embodiment of the present invention, the stacked state of the battery cell (100) can be stably maintained through the mounting part (M1) provided in the heat dissipation member (300). In particular, in the case of a pouch-type battery, due to its structural characteristics, it may be difficult to stably maintain a configuration in which multiple batteries are stacked in the left-right direction while standing upright. However, according to the above embodiment, since each pouch-type battery is stably mounted on the mounting part (M1) of the heat dissipation member (300) while standing upright, the horizontal stacked state of the pouch-type battery can be stably maintained.

[0068] In addition, according to the above embodiment, the contact area between the battery cell (100) and the heat dissipation member (300) can be increased. That is, in the above embodiment, not only are the main body portion (310) of the battery cell (100) and the heat dissipation member (300) in contact with each other, but the extended portion (320) of the battery cell (100) and the heat dissipation member (300) may also be in contact. For example, if the battery cell (100) is a pouch-type battery, the bottom of the storage portion (C1) of the pouch-type battery and the seating portion (M1) of the heat dissipation member (300) may be in contact with each other. Therefore, in this case, the heat transfer performance between the battery cell (100) and the heat dissipation member (300) is improved, and the cooling performance and thermal runaway prevention performance of the battery module can be further improved.

[0069] The battery module according to the present invention may further include a thermal resin. The thermal resin is a material for increasing the heat transfer efficiency between different components, and various heat transfer materials known at the time of filing the present invention may be included as the thermal resin of the present invention. For example, in the embodiment of FIG. 7, the space between the battery cell (100) and the module case (200), such as the parts marked B3 and B4, may be filled with a thermal resin. In one embodiment of the present invention, the heat transfer performance of such a thermal resin may be further improved, which will be explained in more detail with reference to FIG. 8 and FIG. 9.

[0070] FIG. 8 is a perspective view schematically showing the configuration of a heat dissipation member (300) according to another embodiment of the present invention. FIG. 9 is an enlarged view showing a part of the configuration in which the heat dissipation member (300) of FIG. 8 is interposed between battery cells (100). For example, FIG. 9 can be said to show a part of the configuration of a cross-section along the line A2-A2' in a state where battery cells (100) are located on the left and right sides, respectively, of the heat dissipation member (300) of FIG. 8.

[0071] Referring to FIGS. 8 and 9, an inlet groove may be formed in the extension portion (320) of the heat dissipation member (300), as indicated by the portion marked D. This inlet groove (D) may be formed in a shape that extends from the side of the extension portion (320) to the portion where the seating part (M1) is formed. For example, the inlet groove (D) may be formed in the lower extension portion (320) of the heat dissipation member (300) and may have a shape that is concavely recessed downward from the upper surface of the lower extension portion (320). Additionally, this inlet groove (D) may be formed in a shape that extends from the upper surface of the lower extension portion (320) to the side. Furthermore, although not shown in the drawings, the inlet groove (D) may also be formed in the upper extension portion (320) of the heat dissipation member (300).

[0072] According to this embodiment of the present invention, the heat transfer performance of the thermal resin can be further improved. For example, in this embodiment, the thermal resin filled between the battery cell (100) and the module case (200) can be introduced into the space between the battery cell (100) and the heat dissipation member (300) through the inlet groove (D), as indicated by the dotted arrow in FIG. 9. Thus, the heat transfer performance between the battery cell (100) and the heat dissipation member (300) can be further increased. In particular, during the manufacturing or assembly process of the battery module, the thermal resin can be filled into the space between the battery cell (100) and the module case (200) in a fluid state, such as a gel or a sol. At this time, the fluid thermal resin can easily penetrate into the space between the battery cell (100) and the heat dissipation member (300) through the inlet groove (D).

[0073] FIG. 10 is a diagram schematically illustrating a part of the configuration of a battery module according to another embodiment of the present invention. For example, FIG. 10 can be described as a variation of the embodiment of FIG. 7.

[0074] Referring to FIG. 10, the extension portion (320) of the heat dissipation member (300) may be configured to be inserted into the interior of the module case (200). To this end, an insertion groove may be formed on the inner surface of the module case (200) in a shape corresponding to the shape of the extension portion (320). For example, as indicated by G3 in FIG. 10, an insertion groove formed concavely in the downward direction may be formed on the upper surface of the lower plate of the module case (200). Then, the lower extension portion (320) of the heat dissipation member (300) may be inserted into this insertion groove (G3). Additionally, as indicated by G4 in FIG. 10, an insertion groove formed concavely in the upward direction may be formed on the lower surface of the upper plate of the module case (200). Then, the upper extension portion (320) of the heat dissipation member (300) may be inserted into this insertion groove (G4).

[0075] According to this embodiment of the present invention, the bonding strength between the heat dissipation member (300) and the module case (200) can be improved due to the interlocking connection between the extension part (320) and the insertion grooves (G3, G4). Therefore, even in situations such as external impact or internal gas generation, the components inside the battery module can be stably maintained without dislodging from their positions or collapsing. Furthermore, according to the above embodiment, the contact area between the heat dissipation member (300) and the module case (200) can be increased. Therefore, the heat transfer efficiency from the heat dissipation member (300) to the module case (200) can be increased. Thus, according to this embodiment of the present invention, the cooling performance and heat propagation prevention performance of the battery module can be further improved.

[0076] Additionally, the extension portion (320) of the heat dissipation member (300) may be configured to have a thickness that increases towards the end.

[0077] For example, referring to the configuration illustrated in FIG. 10, the lower extension (320) of the heat dissipation member (300) may be configured to have a portion that becomes thicker as it moves downward. Additionally, the upper extension (320) of the heat dissipation member (300) may be configured to have a portion that becomes thicker as it moves upward. Furthermore, the extension (320) of the heat dissipation member (300) may have a cross-section in the shape of a trapezoid.

[0078] According to this embodiment of the present invention, the contact area between the lower surface of the heat dissipation member (300) and the module case (200) can be increased, thereby improving the heat transfer performance and bonding strength between the heat dissipation member (300) and the module case (200). Furthermore, as in the above embodiment, when the cross-section is formed in a trapezoidal shape, a space is provided where the battery cell (100) can be stably seated, while also allowing sufficient contact with the module case (200).

[0079] Furthermore, as illustrated in FIG. 10, in an embodiment where the extension portion (320) of the heat dissipation member (300) is inserted into the module case (200), if the extension portion (320) is formed to become progressively thicker toward the end, the bonding force between the heat dissipation member (300) and the module case (200) can be further improved. For example, in the configuration illustrated in FIG. 10, the lower extension portion (320) of the heat dissipation member (300) may be difficult to detach in the upward direction from the bottom plate of the module case (200). Also, in the embodiment of FIG. 10, the upper extension portion (320) of the heat dissipation member (300) may be difficult to detach in the downward direction from the top plate of the module case (200). Additionally, in the embodiment of FIG. 10, movement of the heat dissipation member (300) in the left-right direction (Y-axis direction) can also be suppressed.

[0080] As described in the preceding embodiment, two or more extensions (320) may be formed at different ends of the main body (310). In this case, the two or more extensions (320) may be made of different materials.

[0081] For example, as illustrated in the embodiment of FIG. 10, the heat dissipation member (300) may be configured such that the extension portion (320) is provided on both the upper and lower parts of the main body portion (310). In this case, the upper extension portion (320) and the lower extension portion (320) may be made of different materials.

[0082] In particular, the two extension portions (320) may be composed of materials having different thermal conductivity. For example, in the embodiment of FIG. 10, the heat dissipation member (300) may be configured such that the upper extension portion (320) and the lower extension portion (320) have different thermal conductivity. As a more specific example, in the embodiment of FIG. 10, the lower extension portion (320) may be composed of a material having higher thermal conductivity than the upper extension portion (320).

[0083] According to this embodiment of the present invention, it is possible to induce a path for heat transfer in the heat dissipation member (300). For example, in the embodiment of FIG. 10, if the thermal conductivity of the lower extension (320) is higher than the thermal conductivity of the upper extension (320), the heat absorbed from the battery cell (100) to the main body (310) can be induced to move toward the lower extension (320) rather than the upper extension (320). In particular, as described below, when a cooling member is located on the lower side of the module case (200), it is preferable to guide the heat toward the lower extension (320).

[0084] Additionally, the two different extensions (320) may be made of materials with different melting points. For example, in the embodiment of FIG. 10, the upper extension (320) may be made of a material with a higher melting point than the lower extension (320). At this time, the lower extension (320) may be made of a material with a lower melting point but higher thermal conductivity than the upper extension (320).

[0085] According to this embodiment of the present invention, different functions can be partially assigned to the heat dissipation member (300). For example, as in the above embodiment, the upper extension part (320) can be made of a material with a high melting point so that the heat dissipation member (300) can be stably maintained without melting or collapsing even in the case of flames or high temperatures that tend to move upward inside the module case (200). In addition, the lower extension part (320) can be made of a material with high thermal conductivity so that heat absorbed from the battery cell (100) can be smoothly discharged to the lower side of the battery module through the heat dissipation member (300).

[0086] As another example, the upper extension (320) may be composed of a polymer material with low thermal conductivity, and the lower extension (320) may be composed of a metal material with high thermal conductivity. In this case, heat absorbed by the main body (310) of the heat dissipation member (300) may be directed mainly toward the lower side, and directed toward the upper side may be suppressed as much as possible. This embodiment may be applied particularly when it is undesirable for heat to be applied to the upper side of the battery module. For example, when other components such as another battery module or BMS are located on the upper side of the battery module, or when a user such as a driver of an electric vehicle is located there, safety can be further enhanced by blocking the transfer of heat to the upper side of the battery module as in the above embodiment.

[0087] FIG. 11 is a diagram schematically showing the configuration of a heat dissipation member (300) according to another embodiment of the present invention.

[0088] Referring to FIG. 11, the extension portion (320) may be configured to be detachable from the main body portion (310). For example, the lower extension portion (320) provided in the heat dissipation member (300) may be configured to be detachable or mountable from the lower part of the main body portion (310). Additionally, the upper extension portion (320) provided in the heat dissipation member (300) may be configured to be detachable or mountable from the upper part of the main body portion (310).

[0089] According to this embodiment of the present invention, the manufacturing of a heat dissipation member (300) equipped with a main body (310) and an extension (320) can be made easier. In particular, according to this embodiment, as described above, a configuration in which different extensions (320) are formed from different materials can be more easily implemented. Furthermore, according to the above embodiment, the main body (310) is used in common, and an extension (320) of an appropriate material or shape can be used depending on the internal or external structure or situation of the battery module. For example, for some battery modules, a material with high thermal conductivity can be applied to the lower extension (320), and for other battery modules, a material with high thermal conductivity can be applied to the upper extension (320). Alternatively, for other battery modules, a material with excellent flame resistance can be applied to the upper extension (320). In this way, according to this embodiment of the present invention, the heat dissipation member (300) can be configured in various forms as needed depending on the situation.

[0090] In addition, according to the above embodiment, the assembly of the battery module can be further improved. For example, a number of battery cells (100) and heat dissipation members (300) can be alternately stacked while only the lower extension part (320) is attached to the main body part (310) and the upper extension part (320) is separated, and after the stacking is completed, the upper extension part (320) can be attached to the upper side of each heat dissipation member (300). In this case, the stacking process of the battery cells (100) and heat dissipation members (300) can be prevented from being obstructed by the upper extension part (320).

[0091] In such an embodiment, the main body (310) and the extension (320) may be configured to be snap-fittable. For example, referring to the embodiment of FIG. 11, fastening protrusions protruding in the left and right directions may be formed on the lower and upper parts of the main body (310), as indicated by P1 and P2. In addition, fastening grooves may be formed on the lower extension (320) and the upper extension (320) in a shape corresponding to the shape of the fastening protrusions (P1, P2), as indicated by F1 and F2.

[0092] According to this embodiment of the present invention, due to the fitting connection configuration of the main body (310) and the extension (320), the extension (320) can be prevented from being easily separated from the main body (310) when it is connected to the main body (310). In particular, according to the above embodiment, in order to separate the extension (320) from the main body (310), the extension (320) must be moved in the front-rear direction (X-axis direction), and it may be difficult to move and separate the extension (320) in the up-down direction (Z-axis direction) or the left-right direction (Y-axis direction). Therefore, in this case, the detachable configuration of the main body (310) and the extension (320) can be implemented more easily.

[0093] Meanwhile, in the embodiment of FIG. 11, both the upper extension part (320) and the lower extension part (320) are shown as being detachable, but some of them may be maintained in a fixed state or manufactured in an integrated state, and only the other part may be configured to be detachable. For example, in the embodiment of FIG. 11, the lower extension part (320) may be configured to be inseparable in an integrated state with the main body part (310), and the upper extension part (320) may be configured to be detachable so as to be separated from the main body part (310).

[0094] FIG. 12 is a diagram schematically showing a part of the configuration of a battery module according to another embodiment of the present invention.

[0095] Referring to FIG. 12, the battery module according to the present invention may further include a cooling member (400). The cooling member (400) may be configured to be located outside the module case (200) to absorb heat transferred to the module case (200) and to release the absorbed heat to the outside. In particular, the cooling member (400) may be configured to have a refrigerant, such as cooling water, flowing inside, thereby allowing it to more easily absorb heat from the module case (200) and discharge it to the outside of the module. The configuration of such a cooling member (400) may employ various forms of cooling configurations known at the time of filing the present invention, and the present invention is not limited by the specific form of such a cooling member (400). For example, the cooling member (400) may be a heat sink.

[0096] At this time, the heat dissipation member (300) may be provided with an extension portion (320) at the end of the portion where the cooling member (400) is located. For example, as shown in FIG. 12, when the cooling member (400) is located at the bottom of the module case (200), the extension portion (320) may be located at the bottom of the heat dissipation member (300). That is, the extension portion (320) may not be provided at the top of the heat dissipation member (300).

[0097] According to this embodiment of the present invention, heat absorbed by the main body (310) can be moved more smoothly to the side where the cooling member (400) is located through the extension (320). Accordingly, the movement of heat toward the cooling member (400) via the heat dissipation member (300) and the module case (200) can be made rapid through the shortest possible path. Accordingly, the cooling performance and heat propagation suppression performance of the battery module can be improved.

[0098] Meanwhile, when a cooling member (400) is provided on one side of the battery module as described above, various embodiments described above, particularly the embodiments described in FIGS. 7 to 11, may also be applied. For example, regarding the embodiment of FIG. 12, a heat dissipation member (300) as shown in FIG. 10 or FIG. 11 may be applied, and the lower extension (320) may be made of a material having a higher thermal conductivity than the upper extension (320).

[0099] In addition, as in the above embodiment, when the cooling member (400) is located on one side of the module case (200), a heat transfer material such as a TIM (Thermal Interface Material) may be interposed between the cooling member (400) and the module case (200), as shown in the part labeled I in FIG. 12.

[0100] FIG. 13 is a perspective view schematically showing the configuration of a heat dissipation member (300) according to another embodiment of the present invention, and FIG. 14 is a diagram schematically showing the configuration of a battery module to which the heat dissipation member (300) of FIG. 13 is applied.

[0101] Referring to FIGS. 13 and 14, the extension portion (320) of the heat dissipation member (300) may have irregularities formed on the outer surface that contacts the module case (200). Here, the irregularities may have a shape in which concave and convex portions are repeatedly arranged. More specifically, the upper extension portion (320) of the heat dissipation member (300) may have a first irregularity formed on the upper surface as indicated by J1. Additionally, the lower extension portion (320) of the heat dissipation member (300) may have a first irregularity formed on the lower surface as indicated by J1'. The first irregularities of the heat dissipation member (300) may be configured to have a shape in which concave and convex portions are repeatedly arranged in the left-right direction (Y-axis direction) where a plurality of battery cells (100) are stacked.

[0102] Additionally, irregularities may be formed on the module case (200) in the portion that contacts the extension (320) of the heat dissipation member (300). That is, as indicated by J2 in FIG. 14, a second irregularity may be formed on the upper inner surface of the module case (200) in the portion that contacts the upper extension (320) of the heat dissipation member (300) in a shape corresponding to the first irregularity (J1) of the heat dissipation member (300). Additionally, as indicated by J2' in FIG. 14, a second irregularity may be formed on the lower inner surface of the module case (200) in the portion that contacts the lower extension (320) of the heat dissipation member (300) in a position and shape corresponding to the first irregularity (J1') of the heat dissipation member (300). Furthermore, as described in the embodiment of FIG. 10 above, insertion grooves (G3, G4) may be formed in the module case (200) so that an extension (320) is inserted. At this time, the second protrusions (J2, J2') may be formed on the inner surface of the insertion grooves (G3, G4).

[0103] In the above embodiment, the protrusions (J1, J1') of the extension part (320) and the protrusions (J2, J2') of the module case (200) may have a form in which they are engaged with each other. In particular, the first protrusions (J1, J1') of the extension part (320) and the second protrusions (J2, J2') of the module case (200) may be configured such that the protrusions and concave parts are mutually interlocked, and the respective surfaces of the protrusions and concave parts come into contact with each other.

[0104] According to this embodiment of the present invention, the heat transfer performance between the heat dissipation member (300) and the module case (200) can be further improved. In particular, in the above embodiment, the contact area between the extension portion (320) of the heat dissipation member (300) and the module case (200) can be expanded. Therefore, more heat can be transferred through the contact portion. Thus, in this case, the cooling performance through the heat dissipation member (300) can be further improved.

[0105] In addition, according to the above embodiment, the bonding between the heat dissipation member (300) and the module case (200) can be improved by the interlocking of the uneven surfaces between the heat dissipation member (300) and the module case (200). For example, according to the above embodiment, the movement of the heat dissipation member (300) in the left and right directions inside the module case (200) can be suppressed due to the interlocking of the uneven surfaces. In particular, even when vibration or shock is applied to the battery module, the horizontal movement of the heat dissipation member (300) is suppressed, so the stacked state of the multiple battery cells (100) and the heat dissipation member (300) can be maintained more stably. In addition, in this case, even if swelling occurs in the battery cells (100), swelling control due to the fixation of the heat dissipation member (300) may be possible. In addition, in this case, the upright state of the multiple battery cells (100) can be maintained more stably.

[0106] FIG. 15 is a perspective view schematically showing the configuration of a heat dissipation member (300) according to another embodiment of the present invention.

[0107] Referring to FIG. 15, the extension portion (320) of the heat dissipation member (300) may have an extension projection on its outer surface, as indicated by the part marked K. This extension projection (K) may be configured to protrude outward from the outer surface of the extension portion (320). For example, in the case of the upper extension portion (320), the extension projection (K) may be provided in a form that protrudes further upward from the upper surface. Additionally, although not shown in FIG. 15, the lower extension portion (320) may also have an extension projection (K) provided in a form that protrudes further downward from the lower surface. This extension projection (K) may be provided in one form of the uneven configuration (J1, J1', J2, J2') described in the embodiments of FIG. 13 and FIG. 14.

[0108] The above-mentioned expansion protrusion (K), like the preceding uneven configuration (J1, J1', J2, J2'), may be formed in a shape that is convex in the vertical direction and extended in the front-rear direction while moving in the left-right direction, which is the stacking direction of the battery cell (100). Additionally, an expansion groove may be formed in the module case (200) in a shape corresponding to the expansion protrusion (K) so that the expansion protrusion (K) can be inserted.

[0109] In particular, the extension protrusion (K) of FIG. 15 and the uneven configurations (J1, J1', J2, J2') of FIG. 13 and FIG. 14 may be configured to have unformed portions in the front-rear direction in the extension portion (320) of the heat dissipation member (300). For example, referring to the embodiment of FIG. 15, the extension protrusion (K) may have portions where the extension protrusion (K) does not protrude, such as the portions marked A3 and A3' on the upper side surface of the extension portion (320).

[0110] According to this embodiment of the present invention, the coupling between the heat dissipation member (300) and the module case (200) is further enhanced by the expansion projection (K), and the contact area between them is increased, thereby improving cooling performance. In particular, according to the above embodiment, not only the left-right movement of the heat dissipation member (300) inside the module case (200) but also the front-back movement of the heat dissipation member (300) can be suppressed. That is, in the case of the above embodiment, movement of the heat dissipation member (300) in all horizontal directions can be controlled.

[0111] FIG. 16 is a cross-sectional view schematically showing a part of the configuration of a battery module according to another embodiment of the present invention. For example, FIG. 16 can be described as a variation of the configuration of FIG. 12.

[0112] Referring to FIG. 16, the heat dissipation members (300) may be included in multiple numbers along the stacking direction of multiple battery cells (100). At this time, the multiple heat dissipation members (300) may be spaced apart from each other by a predetermined distance along the stacking direction of the battery cells (100). In particular, at least two of the multiple heat dissipation members (300) may be configured in different shapes. For example, in FIG. 16, four heat dissipation members (300) (N1 to N4) are spaced apart in the left-right direction (Y-axis direction).

[0113] Here, the four heat dissipation members (300) shown in the embodiment of FIG. 16 can be described as follows: the heat dissipation member (300) located furthest to the left is called the first member (N1), and each heat dissipation member (300) located sequentially in the inner direction, to the right, is called the second to fourth members (N2 to N4). At this time, the fourth member (N4) can be described as being located furthest to the inside in the stacking direction of the battery cell (100) among the four heat dissipation members (300).

[0114] In particular, at least some of the four heat dissipation members (300) may have different structures. For example, the first member (N1) and the second member (N2) may be configured in a different form from the third member (N3) and the fourth member (N4). More specifically, the first member (N1) and the second member (N2) may be contact-coupled to the module case (200) with a structure different from that of the third member (N3) and the fourth member (N4).

[0115] Furthermore, a plurality of heat dissipation members (300) arranged horizontally in a single battery module may be configured such that the heat dissipation member (300) arranged on the inside has superior heat transfer performance than the heat dissipation member (300) arranged on the outside. For example, referring to the embodiment illustrated in FIG. 16, the third member (N3) and the fourth member (N4) located on the inside are provided with extension portions (320) at both upper and lower ends, as indicated by parts Q3 and Q4, and an uneven structure may be formed at the ends of the extension portions (320). On the other hand, the first member (N1) and the second member (N2) may not have a separate uneven structure or extension portion (320) formed, as indicated by parts Q1 and Q2.

[0116] In this case, the contact area with the module case (200) can be increased for the third member (N3) and the fourth member (N4), which are heat dissipation members (300) located on the inner side, compared to the first member (N1) and the second member (N2), which are heat dissipation members (300) located on the outer side. Therefore, the amount or speed of heat transfer can be increased for the heat dissipation members (300) located on the inner side compared to the heat dissipation members (300) located on the outer side. Typically, among a plurality of battery cells (100) stacked in a cell assembly, the temperature of the inner battery cell (100) side may be higher than the temperature of the outer battery cell (100) side. According to the above embodiment, the heat transfer efficiency of the heat dissipation member (300) placed adjacent to the inner battery cell (100) is increased, thereby ensuring superior cooling performance of the inner battery cell (100). Therefore, by preventing the inner battery cell (100) from becoming excessively hot compared to the outer battery cell (100), it may be advantageous for temperature balancing between the inner and outer battery cells (100).

[0117] Additionally, the heat dissipation member (300) positioned on the outer side may be configured to suppress horizontal movement more strongly than the heat dissipation member (300) positioned on the inner side. In other words, the outer heat dissipation member (300) may be configured so that it does not move easily in the horizontal direction compared to the inner heat dissipation member (300). This suppression of movement can be achieved through an insertion configuration or a frictional force increase configuration between the heat dissipation member (300) and the module case (200).

[0118] For example, the first member (N1) and the second member (N2), which are located relatively outward, may have their ends inserted and coupled to the inner surface of the module case (200), such as the parts indicated by Q1 and Q2. On the other hand, the third member (N3) and the fourth member (N4), which are located relatively inward, may be configured so that their ends are not inserted into the inner surface of the module case (200), such as the parts indicated by Q3 and Q4.

[0119] According to this embodiment, when swelling of the battery cell (100) occurs in the cell assembly, the heat dissipation member (300) located on the inner side may be allowed to move to some extent, while the heat dissipation member (300) located on the outer side may be configured to be relatively difficult to move. In this case, the inner heat dissipation member (300) is configured to effectively absorb the swelling of the battery cell (100), while the outer heat dissipation member (300) is configured to suppress the movement of the battery cell (100), thereby preventing damage or breakage of the outermost battery cell (100).

[0120] In particular, the cell assembly can be fixed by thermal resin, etc., at the bottom part, and when swelling occurs in the cell assembly, the battery cell (100) placed at the outermost edge moves the most, which can cause cracks or tears in the pouch outer material. However, according to the above embodiment, while allowing the movement of the inner battery cell (100) to some extent, the movement of the outermost battery cell (100) is suppressed as much as possible, thereby effectively preventing damage to the battery cell (100) along with controlling swelling.

[0122] A battery pack according to the present invention may include one or more battery modules according to the present invention as described above. In addition, a battery pack according to the present invention may further include various other components in addition to these battery modules, such as components of a battery pack known at the time of filing the present invention, such as a BMS, a busbar, a pack case, a relay, a current sensor, etc. Furthermore, in a battery pack according to the present invention, the module case (200) described above may serve as a pack case. In this case, components of a battery pack, such as a BMS, a busbar, or a relay, may be included inside the module case (200). In this case, it is also referred to as a cell-to-pack in that the battery cell (100) is directly housed in the pack case.

[0123] The battery module according to the present invention may be applied to a vehicle such as an electric vehicle or a hybrid vehicle. That is, the vehicle according to the present invention may include a battery module according to the present invention or a battery pack according to the present invention. In addition, the vehicle according to the present invention may further include various other components included in the vehicle in addition to such a battery module or battery pack. For example, the vehicle according to the present invention may further include, in addition to the battery module according to the present invention, a vehicle body, a motor, a control device such as an ECU (electronic control unit), etc.

[0124] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back have been used in this specification, these terms are used merely for convenience of explanation, and it is obvious to those skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0125] As described above, although the present invention has been explained by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs. Explanation of the symbols

[0126] 100: Battery cell C1: Storage section, C2: Sealing section 200: Modular Case 210: Main body frame 220: End frame 300: Heat dissipation component 310: Main body 320: Extension 400: Cooling element

Claims

Claim 1 A battery module comprising: a plurality of battery cells stacked in at least one direction; a module case that accommodates the plurality of battery cells in an internal space; and a heat dissipation member interposed between at least some of the plurality of battery cells, wherein at least a portion thereof contacts the module case to transfer heat generated from the plurality of battery cells to the module case, wherein the heat dissipation member comprises a main body portion formed in a plate shape and an extension portion provided at least one end of the main body portion and formed to be thicker than the main body portion, wherein the extension portion is characterized by having irregularities formed on the surface that contacts the module case. Claim 2 A battery module according to claim 1, wherein the heat dissipation member is configured such that at least one end is inserted into the module case. Claim 3 A battery module according to paragraph 2, characterized in that the heat dissipation member is configured such that both ends located on opposite sides are inserted into the module case. Claim 4 delete Claim 5 A battery module according to claim 1, wherein the extension portion is configured to allow the battery cell to be seated. Claim 6 A battery module according to claim 1, wherein the extension portion is characterized in that at least a portion thereof is inserted into the interior of the module case. Claim 7 A battery module according to claim 1, wherein the extension portion is formed such that at least a portion of it becomes thicker toward the end. Claim 8 A battery module according to claim 1, wherein the extension portion is formed at two or more different ends of the main body portion, and the two or more extension portions are composed of different materials. Claim 9 A battery module according to claim 1, wherein the extension part is configured to be detachably attached to the main body part. Claim 10 A battery module according to claim 1, further comprising a cooling member configured to be located outside the module case and to absorb heat transferred to the module case and release it to the outside, wherein the heat dissipation member is characterized by having the extension portion at the end of the portion where the cooling member is located. Claim 11 delete Claim 12 A battery module according to claim 1, wherein the heat dissipation members are included in a plurality along the stacking direction of the plurality of battery cells, and at least two of the plurality of heat dissipation members are configured in different shapes. Claim 13 A battery pack comprising a battery module according to any one of paragraphs 1 through 3, 5 through 10, and 12. Claim 14 An automobile comprising a battery module according to any one of paragraphs 1 through 3, 5 through 10, and 12.

Images