Battery module having improved cooling structure and battery pack comprising same

Abstract

A battery module according to one embodiment of the present invention comprises: a cell assembly in which a plurality of battery cells are stacked in one direction; a battery module includes a battery cell assembly, a heat dissipation member in contact with a battery cell within the battery cell assembly, and a module frame storing the battery cell assembly, in which the heat dissipation member includes a plate-shaped member parallel to one surface of the battery cell and a reinforcing member disposed between the plate-shaped member and the battery cell. The reinforcing member extends from at least one of an upper edge and a lower edge of the plate-like member.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2022-0154007 filed in the Korean Intellectual Property Office on November 16, 2022, the disclosure of which is incorporated herein by reference in its entirety.

[0003] The present disclosure relates to a battery module and a battery pack including the same, and more particularly, to a battery module having an improved cooling structure and a battery pack including the same. Background Art

[0004] As the technology of mobile devices develops and the demand for them increases, the demand for secondary batteries as energy sources is increasing rapidly. In particular, secondary batteries have attracted considerable attention as energy sources for electric drive devices such as electric bicycles, electric vehicles, and hybrid electric vehicles, and for mobile devices such as mobile phones, digital cameras, laptop computers, and wearable devices.

[0005] In small mobile devices, one or two or three battery cells are used per device, while medium or large devices such as vehicles require high power and large capacity. Therefore, medium or large battery modules having a plurality of battery cells electrically connected to each other are used.

[0006] On the other hand, when a plurality of battery cells are connected in series / parallel to configure a battery pack, a battery module including at least one battery cell is generally configured first, and then the battery pack is configured by using the at least one battery module and adding other components.

[0007] Since the battery cells constituting such medium or large battery modules are secondary batteries that can be charged and discharged, such high-output, large-capacity secondary batteries generate a large amount of heat during charging and discharging. In this case, the heat generated from multiple battery cells can be accumulated in a narrow space, so that the temperature can rise faster and excessively. In other words, a battery module in which multiple battery cells are stacked and a battery pack equipped with these battery modules can obtain high output, but it is not easy to remove the heat generated from the battery cells during charging and discharging. When the heat dissipation of the battery cells is not properly performed, the degradation of the battery cells is accelerated, the life is shortened, and the possibility of explosion or fire increases.

[0008] In addition, in the case of a battery module included in a vehicle battery pack, it is often exposed to direct sunlight and may be placed under high temperature conditions (e.g., in summer or in desert areas). In addition, since a plurality of battery modules are centrally arranged to increase the mileage of a vehicle, a flame or heat generated in any one battery module may easily spread to an adjacent battery module, which may eventually cause the battery pack itself to catch fire or explode.

[0009] Figure 1 is a perspective view showing a battery cell assembly to which a conventional cooling fin is applied. Figure 2 It is shown that the setting is Figure 1 An exploded view of a cooling fin structure between battery cells included in a battery cell assembly.

[0010] Reference Figure 1 and Figure 2 The conventional battery cell assembly 1 includes a plurality of battery cells 10 formed by stacking a plurality of battery cells 10 side by side in one direction, and cooling fins 20 interposed between the battery cells 10 adjacent to each other. The cooling fins 20 may include Figure 2 The plate-shaped heat sink 21 shown and the coolant tube 22 formed on the edge of the heat sink 21, and the insulating sheet layer 25 formed on each of the upper and lower surfaces or the left and right surfaces of the heat sink 21. At this time, the insulating sheet layer 25 can be omitted, and the surface of the heat sink 21 can be insulatingly coated.

[0011] The coolant pipe 22 may be hooked with the heat dissipation plate 21, or the coolant pipe 22 and the heat dissipation plate 21 may be integrally formed. The coolant pipe 22 is formed to be arranged outside the battery cell 10.

[0012] The battery cell assembly 1 may be accommodated in a module frame (not shown) to form a battery module, and heat generated in the battery cell may be cooled by the cooling fins 20 included in the battery cell assembly 1. However, a separate insulating sheet layer or insulating coating is required to ensure the thickness and electrical insulation of the cooling fins 20, and thus space utilization is low.

[0013] Figure 3 is a diagram showing a heat discharge path in a conventional battery module.

[0014] Reference Figure 3 , a conventional battery module 30 includes a cell assembly 70 and a module frame 40 accommodating the cell assembly 70, wherein the cell assembly 70 includes battery cells 60 stacked in a preset direction, wherein the cell assembly 70 is fixedly located on a thermally conductive resin layer 50 located on a lower surface of the module frame 40. In this case, in order to cool the heat generated in the cell assembly 70, a heat conductive resin layer 50 located at a position close to the module frame 40 is provided. Figure 3The bottom of the module frame 40 contacts the heat sink 90 in the -z-axis direction, and a thermal pad 80 for heat transfer may be further installed between the heat sink 90 and the bottom of the module frame 40 .

[0015] However, since the heat sink 90 does not receive heat transfer when in direct contact with the battery cell assembly 70, its cooling efficiency is not very high, and the cooling path is formed in one width direction (-z axis direction) of the battery cell, so that a temperature gradient may occur. Figure 3 The structure is configured so that the thermally conductive resin layer 50 fixes the battery cell assembly 70 on one side, so when a large expansion occurs in a high-capacity battery such as an all-solid-state battery and a silicon-based battery, a bag-shaped battery cell rupture problem may occur.

[0016] Therefore, in order to extend the life of a battery module and / or a battery pack, it is necessary to improve the cooling efficiency of the battery module / battery pack and enhance the structural stability so that the temperature of the battery cells does not increase. Summary of the invention

[0017] Technical issues

[0018] An object of the present invention is to provide a battery module and a battery pack which can improve heat transfer performance by changing the conventional cooling fin structure.

[0019] Another object of the present disclosure is to provide a battery module and a battery pack which increase space utilization while maintaining uniform cell temperature in a cell that has been enlarged to achieve high-speed charging and high-capacity cells.

[0020] Another object of the present invention is to provide a battery module and a battery pack which extend battery life by eliminating spatial non-uniformity of cooling performance caused by battery cells that are not directly cooled in an impregnated cooling structure.

[0021] Another object of the present invention is to provide a battery module and a battery pack having enhanced structural stability in the z-axis direction.

[0022] The objects of the present disclosure are not limited to the aforementioned objects, and any other objects and advantages not mentioned herein should be clearly understood by those skilled in the art from the following description and the accompanying drawings.

[0023] Technical Solution

[0024] According to one embodiment of the present disclosure, a battery module is provided, which includes: a cell assembly, which is formed by stacking a plurality of battery cells in one direction, a heat dissipation member, which is in contact with the battery cells within the cell assembly, and a module frame, which accommodates the cell assembly, wherein the heat dissipation member includes a plate-like member and a reinforcing member, the plate-like member is parallel to a surface of the battery cell, and the reinforcing member extends from at least one of a first portion and a second portion of the plate-like member.

[0025] A cell unit including the battery cell and the heat dissipation member includes: a first battery cell and a second battery cell, a first heat dissipation member, the first heat dissipation member being located on one surface of the first battery cell, and a second heat dissipation member being located on one surface of the second battery cell, wherein, among extensions of the first reinforcing member and the second reinforcing member respectively included in the first heat dissipation member and the second heat dissipation member, a first opening portion exposing portions of the first battery cell and the second battery cell is formed between the extensions directly contacting the first battery cell and the second battery cell.

[0026] A second opening portion exposing a portion of the module frame may be formed between the extending portion of the first reinforcement member and the extending portion of the second reinforcement member.

[0027] A cooling channel is formed inside the first reinforcement member and the second reinforcement member, and the cooling channel is impregnated with an insulating coolant so that the insulating coolant and the battery cell can directly contact each other through the first opening portion.

[0028] The battery cell units are stacked in a plurality of numbers within the battery cell assembly, and the battery module may further include a compression pad located between battery cell units adjacent to each other among the battery cell units stacked in a plurality of numbers.

[0029] The cell unit may further include a compression pad located between the first battery cell and the second battery cell.

[0030] The battery cell units are stacked in a plurality of numbers within the battery cell assembly, and the battery module may further include a compression pad located between battery cell units adjacent to each other among the battery cell units stacked in a plurality of numbers.

[0031] The reinforcement member includes at least two extending portions parallel to each other, and a cooling channel may be formed between the two extending portions.

[0032] The cooling channel is impregnated with an insulating coolant so that the insulating coolant and the battery cells are in direct contact with each other.

[0033] The reinforcing member may have an extrusion molding type structure.

[0034] The at least two extending portions may extend from the plate-like member in the same direction.

[0035] The reinforcing member may have a ress molding type structure.

[0036] The reinforcing member extends from the plate-shaped member in a zigzag shape and may be formed in a space between the battery cell and the module frame.

[0037] The reinforcement members are respectively formed on upper and lower edges of the plate-shaped member, and the reinforcement members may be in contact with upper and lower portions of the module frame, respectively.

[0038] The reinforcing member included in the heat dissipating member is integrally formed with the plate-shaped member, and the reinforcing member may be formed by bending the plate-shaped member.

[0039] The heat dissipation member may include aluminum, stainless steel, copper, gold, graphite, graphene, CNT (carbon nanotube), or a composite material thereof.

[0040] The heat dissipation member may have a form in which at least two of aluminum, stainless steel, copper, gold, graphite, graphene, and CNT (carbon nanotube) are laminated together.

[0041] The module frame may be impregnated with an insulating coolant.

[0042] According to another embodiment of the present disclosure, there is provided a battery pack including the above-mentioned battery module.

[0043] Beneficial Effects

[0044] According to an embodiment, a heat dissipation member is made of a material that is lighter and thinner than a conventional heat dissipation member, thereby being able to improve heat transfer performance.

[0045] Furthermore, in the immersion cooling structure, the heat dissipation member interposed between the battery cells extends from the upper portion and / or the lower portion of the cell assembly and directly contacts the insulating coolant, so that the cooling efficiency can be improved.

[0046] Furthermore, a shape is added to enhance the rigidity of a cell unit in which the battery cell and the heat dissipation member are combined, so that the structural stability of the battery module can be improved.

[0047] Effects obtainable from the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood from the description and the accompanying drawings by those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a perspective view showing a battery cell assembly to which a conventional cooling fin is applied;

[0049] Figure 2 It shows that the setting Figure 1 An exploded view of a cooling fin structure between battery cells included in a battery cell assembly;

[0050] Figure 3 is a diagram showing a heat discharge path in a conventional battery module;

[0051] Figure 4 is a perspective view showing a battery module according to an embodiment of the present disclosure;

[0052] Figure 5 It is shown that the Figure 4 A three-dimensional image of a battery cell in a battery cell assembly;

[0053] Figure 6 It is shown that the Figure 4 A three-dimensional diagram of a battery cell unit in a battery module;

[0054] Figure 7 Observed along the x-axis Figure 6 A front view of a battery cell unit;

[0055] Figure 8 is a perspective view showing a battery cell unit according to another embodiment of the present disclosure;

[0056] Fig. 9 Observed along the x-axis Figure 8 Front view of a battery cell unit.

[0057] Fig.10 It is shown that Figure 6 A diagram of a portion of a cell assembly of a cell unit;

[0058] Fig.11 and Fig.12 It is shown Fig.10 Figure 2 shows a variation of a battery cell assembly;

[0059] Fig.13 It is shown that Figure 8 A diagram of a portion of a cell assembly of a cell unit; and

[0060] Fig.14 and 15 It is shown Fig.13Diagram of the modification of the battery cell assembly. DETAILED DESCRIPTION

[0061] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. The present disclosure can be modified in various different ways and is not limited to the embodiments set forth herein.

[0062] In order to clearly describe the present disclosure, parts irrelevant to the description will be omitted, and the same reference numerals denote the same elements throughout the description.

[0063] In addition, since the size and thickness of each element shown in the drawings are arbitrarily shown for the convenience of explanation, it is obvious that the present disclosure is not necessarily limited to those shown in the drawings. In the drawings, the thickness is exaggerated in order to clearly show several layers and regions. In the drawings, the thickness of some layers and regions is exaggerated in order to facilitate the explanation.

[0064] In addition, throughout the specification, when a part is referred to as “including” or “comprising” a certain component, it means that the part may further include other components, without excluding the other components, unless otherwise specified.

[0065] Furthermore, throughout the specification, when referred to as a “plane”, it means observing the target portion from the upper side, and when referred to as a “cross section”, it means observing the target portion from the side of the cross section cut vertically.

[0066] Figure 4 is a perspective view showing a battery module according to an embodiment of the present disclosure. Figure 5 It is shown that the Figure 4 A three-dimensional image of a battery cell in a battery cell assembly.

[0067] Reference Figure 4 According to an embodiment of the present disclosure, a battery module 110 includes: a cell assembly 120 formed by stacking a plurality of battery cells 110 in one direction; a module frame 200 having openings on the front and rear surfaces to accommodate the cell assembly 120; and an end plate 150 covering the front and rear surfaces of the module frame 200.

[0068] The end plate 150 may be located on a first side (x-axis direction) and a second side (-x-axis direction) of the opening of the module frame 200, and may be formed to cover the battery cell assembly 120. The end plate 150 may physically protect the battery cell assembly 120 and other electrical components from external impacts. In addition, the battery module according to this embodiment may further include a bus bar frame (not shown) located between the battery cell assembly 120 and the end plate 150, and an insulating cover (not shown) located between the bus bar frame and the end plate 150. On the bus bar frame, electrode leads protruding from the battery cell 110 and bus bars for electrically connecting adjacent cells may be connected. The insulating cover may serve to electrically insulate the end plate 150 from the electrical components on the battery cell assembly 120 and / or the bus bar frame.

[0069] In the present embodiment, the module frame 200 is shown as a single frame (the single frame is configured to surround the upper, lower, left and right four surfaces of the battery cell assembly 120), but is not limited thereto. The module frame may have a structure in which the left and right surfaces and the lower surface of the battery cell assembly 120 are covered by a U-shaped lower frame, the upper surface of the battery cell assembly 120 is covered by an upper plate, and then the U-shaped lower frame and the upper plate are combined.

[0070] refer to Figure 4 and Figure 5 The battery cell assembly 120 includes a plurality of battery cells 110 stacked in one direction, and the plurality of battery cells 110 may be stacked in the y-axis direction, such as Figure 4 As shown. The battery cell 110 is preferably a pouch-type battery cell. For example, referring to Figure 5 According to the present embodiment, the battery cell 110 has a structure in which two electrode leads 111 and 112 protrude from one end 114a and the other end 114b of the battery body 113 in opposite directions. The battery cell 110 can be manufactured by joining the two ends 114a and 114b of the battery cell case 114 and one side surface 114c connecting them in a state where the electrode assembly (not shown) is accommodated in the battery cell case 114. In other words, the battery cell 110 according to the present embodiment has a total of three sealing portions 114sa, 114sb and 114sc, wherein the sealing portions 114sa, 114sb and 114sc have a structure sealed by a method such as heat fusion, and the remaining other side portions may include a connecting portion 115. The longitudinal direction of the battery cell 110 may be defined between the two ends 114a and 114b of the cell case 114 , and the lateral direction of the battery cell 110 may be defined between one side 114c connecting the two ends 114a and 114b of the cell case 114 and the connection portion 115 .

[0071] The connection portion 115 is a region extending along one edge of the battery cell 110, and a protrusion 110p of the battery cell 110 may be formed at an end of the connection portion 115. The protrusion 110p may be formed on at least one of both ends of the connection portion 115, and may protrude in a direction perpendicular to the direction in which the connection portion 115 extends. The protrusion 110p may be located between the connection portion 115 and one of the sealing portions 114sa and 114sb of both ends 114a and 114b of the cell case 114.

[0072] The cell housing 114 is generally formed in a laminated structure of a resin layer / metal film layer / resin layer. For example, when the surface of the cell housing is formed of an O (oriented) nylon layer, when a plurality of battery cells are stacked to form a medium-sized battery module and a large battery module, the surface of the battery housing is prone to sliding due to external impact. Therefore, in order to prevent this problem and maintain a stable stacking structure of the battery cells, a sticky adhesive such as a double-sided tape or a chemical adhesive bonded by a chemical reaction during bonding may be attached to the surface of the battery housing to form a cell assembly 120. According to one embodiment of the present disclosure, as will be described later, a heat dissipation member in contact with the battery cell 110 is formed. For example, a heat dissipation member is formed between battery cells 110 adjacent to each other, and the heat dissipation member and the battery cell 110 are fixed with an adhesive member or the like to form a cell assembly 120, or even without using an adhesive member, the cell assembly 120 may be formed using other fixing members.

[0073] In the present embodiment, the battery cell assembly 120 is accommodated in the module frame 200 and may be cooled by the insulating coolant impregnated in the module frame 200. The insulating coolant may be an insulating coolant or insulating oil having an electrical insulating property. When the module frame 200 is impregnated with the insulating coolant and cooled, the battery cell 110 and the coolant may be in direct contact with each other, thereby improving the cooling efficiency. However, due to the Figure 5 The portion of the cell body 113 of the battery cell 110 shown in FIG. 1 is not directly exposed to the insulating coolant, so it may cause spatial non-uniformity of cooling performance. This causes a local temperature increase of the battery cell 110, which may cause degradation of the battery cell.

[0074] In order to solve such a problem, according to an embodiment of the present disclosure, a heat dissipation member to be described later is formed to be interposed between a first battery cell and a second battery cell in the battery cell assembly 120. For example, the heat dissipation member may be provided between battery cells 110 adjacent to each other. The heat dissipation member may be formed once for every two battery cells 110, or may be formed once for every four battery cells 110.

[0075] Figure 6 It is shown that the Figure 4 A three-dimensional view of a battery cell unit in a battery module. Figure 7 Observed along the x-axis Figure 6 Front view of a battery cell unit.

[0076] Reference Figure 6 and Figure 7 According to the present embodiment, the battery cell unit 125 includes a battery cell 110 and a heat dissipation member 130. The heat dissipation member 130 includes a plate-shaped member 131 parallel to one surface of the battery cell 110, and a reinforcing member 132 extending from at least one of a first portion and a second portion of the plate-shaped member 131. In one example, the first portion of the plate-shaped member 131 may be an upper edge, and the second portion thereof may be a lower edge. According to Figure 7 The reinforcing member 132 of the embodiment has a structure extending from the upper edge and the lower edge of the plate-like member 131 .

[0077] Specifically, refer to Figure 7 According to the present embodiment, the reinforcing member 132 includes a first reinforcing member 132a and a second reinforcing member 132b. The first reinforcing member 132a and the second reinforcing member 132b each include at least two extensions 133 and 134 arranged parallel to each other. At this time, the at least two extensions 133 and 134 may extend from the plate-like member 131 in the same direction.

[0078] Each of the first reinforcement member 132a and the second reinforcement member 132b includes a first extension portion 133, a connecting portion 135 and a second extension portion 134, wherein the first extension portion 13 is bent from one edge of the plate-like member 131 and covers the upper surface and the lower surface of the battery cell 110, the connecting portion 135 extends from one edge of the plate-like member 131 at regular intervals in the same direction as the direction in which the plate-like member 131 extends, and the second extension portion 134 is bent from the end of the connecting portion 135.

[0079] The reinforcing member 132 according to the present embodiment may have an extrusion-molded structure.

[0080] A first opening portion 136 exposing a portion of the upper and / or lower surface of the battery cell 110 may be formed between the first extension portion 133 of the first reinforcement member 132a and the first extension portion 133 of the second reinforcement member 132b. The first extension portion 133 may directly contact the battery cell 110.

[0081] Exposed module frame 200 ( Fig.10 The second opening portion 137 of the portion of the first reinforcing member 132a may be formed between the second extending portion 134 of the first reinforcing member 132a and the second extending portion 134 of the second reinforcing member 132b. At this time, the cooling channel CP is formed inside the first reinforcing member 132a and the second reinforcing member 132b.

[0082] The cooling channel CP is impregnated with the insulating coolant so that the insulating coolant and the battery cells 110 may directly contact each other through the first opening portions 136 .

[0083] In addition, the insulating coolant and the module frame 200 ( Fig.10 ) can directly contact each other through the second opening portion 137. Therefore, according to the present embodiment, the insulating coolant can be in direct contact with the battery cell 110 and / or the module frame 200 ( Fig.10 ) are in direct contact to improve cooling performance. In addition, since vertical vibration can be absorbed by the reinforcing members 132 located at the upper and lower portions of the battery cell 110, structural stability is improved.

[0084] Heat generated in the battery cell 110 is transferred along the plate members 131 a and 131 b , and the reinforcement members 132 a and 132 b are in direct contact with the insulating coolant through the cooling channel CP to exhibit a cooling effect.

[0085] Therefore, according to the present embodiment, when the insulating coolant is impregnated in the module frame 200 ( Figure 4 ) in the cooling structure, the heat dissipation member 130 inserted between the battery cells 110 is dissipated from the battery cell assembly 120 ( Figure 4 ) and directly contact the insulating coolant, thereby improving the cooling efficiency. In addition, since heat is transferred from the plate-shaped member 131 of the heat dissipation member 130 that contacts the cell body of the battery cell 110 to both the upper and lower parts of the battery module, the temperature difference does not appear to be large, so the life of the battery cell 110 can be extended.

[0086] The heat dissipation member 130 may be formed of a material having high thermal conductivity. For example, the heat dissipation member 130 according to the present embodiment includes aluminum, stainless steel, copper, gold, graphite, graphene, CNT (carbon nanotube) or a composite material thereof. In one example, thermal conductivity and weight may be adjusted by using an aluminum-graphite composite material. The heat dissipation member 130 may have a form in which at least two of aluminum, stainless steel, copper, gold, graphite, graphene and carbon nanotube (CNT) are laminated together. In addition, by laminating a polyethylene terephthalate (PET) insulating layer and a composite material, an effective heat dissipation structure may be formed using a lighter and thinner material compared to a conventional cooling fin structure as a heat dissipation member. The PET insulating layer may implement insulation between the battery cell 110 and the heat dissipation member 130. The PET insulating layer may be laminated on the front and rear surfaces of the aluminum-graphite composite material layer to be disposed between the heat dissipation member 130 and the battery cell 110. In order to bond the aluminum-graphite composite material layer and the PET insulating layer, an adhesive may be applied between them or a thermal fusion method may be used. In the comparative example, when the insulating coating is applied to the heat dissipation member 130 , the coating liquid may be accumulated in the insulated portion of the heat dissipation member 130 , which makes it difficult to achieve a uniform coating thickness.

[0087] Therefore, the heat dissipation member 130 according to the present embodiment may effectively transfer heat generated in the battery cell assembly 120 to the outside, thereby improving the cooling performance of the battery module 100 .

[0088] The heat dissipation member 130 according to this embodiment may be a thin film. The thickness of the heat dissipation member 130 may be less than the thickness of the battery cell 110. Preferably, the thickness of the heat dissipation member 130 may be about 50% or less, or more preferably 20% or less, of the thickness of the battery cell 110. Here, the thickness of the battery cell 110 may be based on Figure 6 The size of the y-axis.

[0089] The thickness of the heat dissipation member 130 may be 0.1 mm to 0.2 mm. Therefore, even if the heat dissipation member 130 covers a large area of ​​the surface corresponding to the battery body 113 of each battery cell 110 constituting the battery cell assembly 120 and the upper or lower portion of the battery cell 110, it will not have a large impact on the energy density of the battery module.

[0090] Figure 8 is a perspective view showing a battery cell unit according to another embodiment of the present disclosure. Fig. 9 Observed along the x-axis Figure 8 Front view of a battery cell unit.

[0091] Reference Figure 8 and Fig. 9According to the present embodiment, the battery cell unit 225 includes a battery cell 110 and a heat dissipation member 230. The heat dissipation member 230 includes a plate-shaped member 231 parallel to one surface of the battery cell 110, and a reinforcing member 232 extending from at least one of a first portion and a second portion of the plate-shaped member 231. In one example, the first portion of the plate-shaped member 231 may be an upper edge, and the second portion may be a lower edge. According to Fig. 9 The reinforcing member 232 of the embodiment has a structure extending from the upper edge and the lower edge of the plate-like member 231 .

[0092] Specifically, see Fig. 9 The reinforcing member 232 according to the present embodiment includes a first reinforcing member 232a and a second reinforcing member 232b. The first reinforcing member 232a and the second reinforcing member 232b may be formed to extend in a zigzag shape from the plate-shaped member 231, respectively.

[0093] Each of the first reinforcement member 232a and the second reinforcement member 232b includes: a first extension portion 233, which is bent from one edge of the plate-shaped member 231 and covers the upper and lower surfaces of the battery cell 110; a connecting portion 235, which is bent from one edge of the first extension portion 233 and extends at regular intervals in the same direction as the direction in which the plate-shaped member 231 extends; a second extension portion 238, which is bent from an end of the connecting portion 235; a connecting portion 235, which is bent from an end of the second extension portion 238 and extends at regular intervals in the same direction as the direction in which the plate-shaped member 231 extends; and a third extension portion 234, which is bent from an end of the connecting portion 235.

[0094] The connection portions 235 may be arranged in parallel with each other, and the first extension portion 233 , the second extension portion 238 , and the third extension portion 234 may be arranged in parallel with each other.

[0095] The reinforcing member 232 according to the present embodiment may have a press-molded structure.

[0096] A first opening portion 236 exposing a portion of the upper and / or lower surface of the battery cell 110 may be formed between the first extension portion 233 of the first reinforcement member 232a and the first extension portion 233 of the second reinforcement member 232b. The first extension portion 233 may directly contact the battery cell 110.

[0097] Exposed module frame 200 ( Fig.13) may be formed between the third extension portion 234 of the first reinforcement member 232a and the third extension portion 234 of the second reinforcement member 232b. At this time, the cooling channel CP is formed inside the first reinforcement member 232a and the second reinforcement member 232b, and the cooling channel CP is impregnated with the insulating coolant so that the insulating coolant and the battery cell 110 can directly contact each other through the first opening portion 236. In addition, the insulating coolant and the module frame 200 ( Fig.13 ) can directly contact each other through the second opening portion 237. Therefore, according to the present embodiment, the insulating coolant can be in direct contact with the battery cell 110 and / or the module frame 200 ( Fig.13 ) direct contact to improve cooling performance.

[0098] In addition to the differences based on the above, the material and structure of the heat dissipation member 130 and the Figure 6 and Figure 7 The contents of the heat transfer paths described in can be similarly applied to the heat dissipation member 230 according to the present embodiment.

[0099] Fig.10 It is shown that Figure 6 A diagram of a portion of a battery cell assembly of a battery cell unit.

[0100] Reference Fig.10 The battery cell assembly 120 can be stacked on Figure 6 and Figure 7 The battery cell 125 described in the embodiment is formed. The battery cell 125 according to the present embodiment includes a first battery cell 110a and a second battery cell 110b in direct contact with each other, a first heat dissipation member 131a located on one surface of the first battery cell 110a, and a second heat dissipation member 131b located on one surface of the second battery cell 110b. Such battery cells 125 may be repeatedly arranged to form a battery cell assembly. According to the present embodiment, the compression pad 161 may be located between battery cells 125 adjacent to each other in the battery cells 125 stacked in multiple numbers. The compression pad 161 may be formed in pairs with one battery cell 125, or may be formed one for every two battery cells 125. However, the present disclosure is not limited thereto, and the number of compression pads 161 may be changed.

[0101] Fig.11 and Fig.12 It is shown Fig.10 FIG. 4 is a diagram of a variation of a battery cell assembly.

[0102] Fig.11 and Fig.12 The embodiments described in the Fig.10 The implementation method described in is the same as that described in the above, and the differences will be described below.

[0103] Reference Fig.11 , the compression pad 161 may be formed between the first battery cell 110a and the second battery cell 110b included in one battery cell unit 125. At this time, the battery cell units 125 adjacent to each other may directly contact each other. The battery cell units 125 directly contacting each other may be fixed to each other using an adhesive member (not shown) or the like.

[0104] Reference Fig.12 , a compression pad 161 is formed between the first battery cell 110a and the second battery cell 110b included in one battery cell unit 125, and further, the compression pad 161 may be located between battery cells 125 adjacent to each other among battery cells 125 stacked into a plurality of stacked battery cells 125.

[0105] In addition to the above differences, Fig.10 The content described in can be applied to Fig.11 and Fig.12 Two implementation methods.

[0106] The compression pad 161 can reduce the shape change of the battery module when the battery cell 110 expands, thereby increasing safety. Fig.10 implementation methods, Fig.11 implementation and Fig.12 When the embodiments are referred to as the first embodiment, the second embodiment, and the third embodiment, in the order of the third embodiment, the second embodiment, and the first embodiment, the degree of impact reduction against expansion is high, thereby allowing various designs to be made taking into account the level required for the user's battery module design.

[0107] Fig.13 It is shown that Figure 8 A diagram of a portion of a battery cell assembly of a battery cell unit.

[0108] Reference Fig.13 The battery cell assembly 120 can be stacked Figure 8 and Fig. 9The battery cell 225 described in is formed. The battery cell 225 according to the present embodiment may include a first battery cell 110a and a second battery cell 110b in contact with each other, a first heat dissipation member 231a located on one surface of the first battery cell 110a, and a second heat dissipation member 231b located on one surface of the second battery cell 110b. Such battery cells 225 may be repeatedly arranged to form a battery cell assembly. According to the present embodiment, the compression pad 161 may be located between battery cells 225 adjacent to each other in the battery cells 225 stacked in multiple numbers. The compression pad 161 may be formed in pairs with one battery cell 225, or may be formed one for every two battery cells 225. However, the present disclosure is not limited thereto, and the number of compression pads 161 may be changed.

[0109] Fig.14 and Fig.15 It is shown Fig.13 FIG. 4 is a diagram of a variation of a battery cell assembly.

[0110] Fig.14 and Fig.15 The embodiments described in the Fig.13 The implementation method described in is the same as that described in the above, and the differences will be described below.

[0111] Reference Fig.14 , the compression pad 161 may be formed between the first battery cell 110a and the second battery cell 110b included in one battery cell unit 225. At this time, the battery cell units 225 adjacent to each other may directly contact each other. The battery cell units 225 directly contacting each other may be fixed to each other using an adhesive member (not shown) or the like.

[0112] Reference Fig.15 , the compression pad 161 is formed between the first battery cell 110a and the second battery cell 110b included in one battery cell unit 225, and further, the compression pad 161 may be located between battery cell units 225 adjacent to each other among the battery cell units 225 stacked in a plurality of numbers.

[0113] In addition to the above differences, Fig.13 The content described in can be applied to Fig.14 and Fig.15 Two implementation methods.

[0114] When the battery cell 110 expands, the compression pad 161 can reduce the shape change of the battery module, thereby increasing safety. Fig.13 implementation methods, Fig.14 implementation and Fig.15When the embodiments are referred to as the fourth embodiment, the fifth embodiment, and the sixth embodiment, in the order of the sixth embodiment, the fifth embodiment, and the fourth embodiment, the degree of impact reduction against expansion is high, thereby allowing various designs to be made taking into account the level required for the user's battery module design.

[0115] According to another embodiment of the present disclosure, a battery pack including the aforementioned battery module is provided. In addition, the battery pack according to the present embodiment may have a structure in which one or more battery modules are aggregated and packaged together with a battery management system (BMS) and a cooling device that controls and manages the temperature, voltage, etc. of the battery.

[0116] The battery pack can be applied to various devices. Such a device can be applied to a vehicle device such as an electric bicycle, an electric car, or a hybrid vehicle, but the present disclosure is not limited thereto and can be applied to various devices that can use a battery module, which also falls within the scope of the present disclosure.

[0117] Although the present invention has been described in detail above with reference to the preferred embodiments of the present invention, it should be understood by those skilled in the art that the scope of the present disclosure is not limited thereto, and that various modifications and improvements may be made to the embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0118] [Explanation of Reference Numerals]

[0119] 100: Battery module

[0120] 110: Battery cells

[0121] 113: Battery cell

[0122] 120: Battery cell components

[0123] 130, 230: heat dissipation components

[0124] 131, 231: Plate-like components

[0125] 132, 232: Reinforcement components

[0126] 132a, 232a: first reinforcing member

[0127] 132b, 232b: Second reinforcing member

[0128] 133, 134, 233, 234, 238: Extension

[0129] 135, 235: Connection

[0130] 136, 236: First opening

[0131] 137, 237: Second opening

[0132] 161: Compression pad

[0133] 200: Module Framework

[0134] 125, 225: battery cell

[0135] CP: Cooling Channel

Claims

1. A battery module, comprising: A cell assembly, the cell assembly being formed by stacking a plurality of battery cells in one direction, a heat dissipation member in contact with the battery cell in the battery cell assembly, and a module frame, wherein the module frame accommodates the battery cell assembly, The heat dissipation member includes a plate-shaped member and a reinforcing member, the plate-shaped member is parallel to one surface of the battery cell, and the reinforcing member extends from at least one of a first portion and a second portion of the plate-shaped member.

2. The battery module according to claim 1, wherein: A cell unit including the battery cell and the heat dissipation member includes: a first battery cell and a second battery cell, a first heat dissipation member located on one surface of the first battery cell, and a second heat dissipation member, the second heat dissipation member being located on one surface of the second battery cell, Among them, among the extension parts of the first reinforcement member and the second reinforcement member respectively included in the first heat dissipation member and the second heat dissipation member, a first opening portion exposing parts of the first battery cell and the second battery cell is formed between the extension parts directly contacting the first battery cell and the second battery cell.

3. The battery module according to claim 2, wherein: A second opening portion exposing a portion of the module frame is formed between the extending portion of the first reinforcement member and the extending portion of the second reinforcement member.

4. The battery module according to claim 3, wherein: A cooling channel is formed inside the first reinforcement member and the second reinforcement member, and the cooling channel is impregnated with an insulating coolant so that the insulating coolant and the battery cell are in direct contact with each other through the first opening portion.

5. The battery module according to claim 2, wherein: The battery cell units are stacked in multiple numbers in the battery cell assembly, and The battery module further includes a compression pad located between battery cell units adjacent to each other among the battery cell units stacked in a plurality of numbers.

6. The battery module according to claim 2, wherein: The battery cell unit also includes a compression pad located between the first battery cell and the second battery cell.

7. The battery module according to claim 6, wherein: The battery cell units are stacked in multiple numbers in the battery cell assembly, and The battery module further includes a compression pad located between battery cell units adjacent to each other among the battery cell units stacked in a plurality of numbers.

8. The battery module according to claim 1, wherein: The reinforcing member comprises at least two extensions parallel to each other, and A cooling channel is formed between the two extensions.

9. The battery module according to claim 8, wherein: The cooling channel is impregnated with an insulating coolant so that the insulating coolant and the battery cells are in direct contact with each other.

10. The battery module according to claim 1, wherein: The reinforcing member has an extruded structure.

11. The battery module according to claim 10, wherein: The at least two extending portions extend from the plate-like member in the same direction.

12. The battery module according to claim 1, wherein: The reinforcing member has a press-formed structure.

13. The battery module according to claim 12, wherein: The reinforcing member extends from the plate-like member in a zigzag shape and is formed in a space between the battery cell and the module frame.

14. The battery module according to claim 1, wherein: The reinforcement members are respectively formed on upper and lower edges of the plate-shaped member, and the reinforcement members are respectively in contact with upper and lower portions of the module frame.

15. The battery module according to claim 1, wherein: The reinforcing member included in the heat dissipating member is integrally formed with the plate-shaped member, and the reinforcing member is formed by bending the plate-shaped member.

16. The battery module according to claim 1, wherein: The heat dissipation member includes aluminum, stainless steel, copper, gold, graphite, graphene, CNT (carbon nanotube) or a composite material thereof.

17. The battery module according to claim 16, wherein: The heat dissipation member has a form in which at least two of aluminum, stainless steel, copper, gold, graphite, graphene, and CNT (carbon nanotube) are laminated together.

18. The battery module according to claim 1, wherein: The module frame is impregnated with an insulating coolant.

19. A battery pack comprising the battery module according to claim 1.

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