Battery pack, electronic device and vehicle containing the battery pack

Abstract

A battery pack with improved manufacturing efficiency is disclosed. To achieve the above object, a battery pack according to the present invention includes: at least one battery module, at least one battery module is provided with a plurality of secondary batteries placed and arranged in a horizontal direction and electrically connected to each other, and a battery frame, the battery frame is provided with a fixing tube configured to fix the plurality of secondary batteries in a uniform arrangement, the fixing tube is located between the plurality of secondary batteries so as to extend in a horizontal direction and has two open ends; and a fixing rod, the fixing rod extends in one direction and is inserted into the fixing tube in a horizontal direction.

Description

Technical Field

[0001] The present disclosure relates to a battery pack having a fixing rod and an electronic device and a vehicle including the same, and more particularly, to a battery pack having improved manufacturing efficiency and an electronic device and a vehicle including the same. Background Art

[0002] Secondary batteries have high applicability to various products and electrical characteristics such as high energy density. Secondary batteries are applied not only to portable electronic devices but also to electric vehicles (EVs), hybrid electric vehicles (HEVs) or energy storage systems driven by electric drive sources.

[0003] Secondary batteries have gained attention because they significantly reduce the use of fossil fuels and do not generate byproducts from the use of energy, making them new environmentally friendly and energy-saving energy sources.

[0004] The battery pack for electric vehicles includes a plurality of battery modules connected to each other to obtain high output, each battery module includes a plurality of battery cells. Each battery cell includes an electrode assembly including a positive electrode current collector and a negative electrode current collector, a separator, an active material, and an electrolyte solution, and can be repeatedly recharged through electrochemical reactions between the components.

[0005] Recently, with the growing need for energy use and large-capacity structures, there is a growing demand for a battery pack having a multi-module structure including a plurality of battery modules, wherein the plurality of battery modules include a plurality of secondary batteries connected in series and / or in parallel. In this case, the battery pack includes battery modules that are closely arranged to each other so as to accommodate many secondary batteries in a limited space.

[0006] In an example of a battery pack, a plurality of battery modules are fixed in a tray. For example, each corner of the battery module is fixed to the tray using a plurality of long bolts. In another example of a battery pack, a flange extending in an outward direction from each of the plurality of battery modules is fixed to the tray using a plurality of long bolts.

[0007] However, this connection method requires multiple long bolts for each of the multiple battery modules. Therefore, during the manufacturing process, the bolt connection operation of the long bolts takes a very long time, and it is difficult to shorten the manufacturing time. In addition, the multiple long bolts increase the weight of the battery pack. Summary of the invention

[0008] Technical issues

[0009] The present disclosure is designed to solve the above-mentioned problems, and thus the present disclosure aims to provide a battery pack which effectively reduces manufacturing time through a simple manufacturing process, and an electronic device and a vehicle including the battery pack.

[0010] These and other objects and advantages of the present disclosure can be understood through the following description and will be apparent from the embodiments of the present disclosure.In addition, it will be easily understood that the objects and advantages of the present disclosure can be achieved through devices and combinations thereof.

[0011] Technical Solution

[0012] To achieve the above object, a battery pack according to the present disclosure includes:

[0013] at least one battery module, the at least one battery module including a plurality of secondary batteries and a battery frame, the plurality of secondary batteries being placed and arranged in a horizontal direction and electrically connected to each other, and the battery frame having a fixing tube configured to fix the plurality of secondary batteries in a predetermined arrangement, the fixing tube being provided between the plurality of secondary batteries, extending in the horizontal direction and having two open ends; and

[0014] A fixing rod extends in one direction and is inserted into the fixing pipe in the horizontal direction.

[0015] In addition, the battery pack may further include: a battery pack tray including a base plate and a fixing wall, the at least one battery module is mounted on the base plate, and the fixing wall extends in an upward direction from an upper surface of the base plate,

[0016] Both ends of the fixing rod may be fixed to the fixing walls provided in the battery pack tray.

[0017] In addition, a fixing groove into which one end or the other end of the fixing rod is inserted and fixed may be partially recessed from the top of the fixing wall of the battery pack tray in a downward direction.

[0018] In addition, a press-fit groove, to which one end or the other end of the fixing rod is press-fitted and fixed, may be recessed from the top of the fixing wall of the battery pack tray in an inward direction.

[0019] In addition, the fixing lever may include a pressing member configured to press the battery module toward the fixing wall of the battery pack tray.

[0020] Additionally, an external thread may be formed in at least a portion of the outer surface of the fixing rod.

[0021] The pressing member may be a pressing nut having an internal thread to move along the external thread of the fixing rod.

[0022] In addition, the battery pack may further include a heat sink interposed between two or more battery modules.

[0023] In addition, two or more fixing rods may be provided.

[0024] Two or more battery modules may be penetrated by the two or more fixing rods through the fixing tubes, respectively.

[0025] Two or more insertion grooves recessed in an upward direction, into which a portion of each of the two or more fixing bars is inserted, may be provided below the heat sink.

[0026] In addition, a thermal pad may be provided between the battery module and the heat sink.

[0027] The thermal pad may include a gas discharge groove extending in an upward and downward direction and a forward and rearward direction and concave in an inward direction of the thermal pad.

[0028] Additionally, the battery pack may further include a cross beam disposed on the base plate of the battery pack tray and configured to be coupled to the two or more fixing bars.

[0029] In order to achieve the above object, an electronic device according to the present disclosure includes a battery pack.

[0030] In order to achieve the above-mentioned object, a vehicle according to the present disclosure includes a battery pack.

[0031] Beneficial Effects

[0032] According to one aspect of the present disclosure, the battery pack of the present disclosure includes: a fixing rod horizontally inserted into a fixing tube provided in at least one battery module, so that a plurality of secondary batteries can be arranged in one direction and fixed by simply inserting the fixing rod to prevent them from moving up and down. Therefore, compared with a battery pack that uses a plurality of long bolts to fix the battery modules, the manufacturing time of the battery pack can be effectively shortened, and the weight of the battery pack can be effectively reduced.

[0033] According to this aspect of the present disclosure, the present disclosure fixes both ends of the fixing rod to which at least one battery module is fixed to the fixing wall provided in the battery pack tray, so that a plurality of battery modules can be fixed and connected to the battery pack tray by simply installing the plurality of battery modules in the battery pack tray of the battery pack. Therefore, the manufacturing time of the battery pack can be effectively shortened, and the use of separate fixing elements can be greatly reduced.

[0034] According to another aspect of the present disclosure, a press-fit groove is recessed from the top of the fixed wall of the battery pack tray in the inward direction, and one end or the other end of the fixing rod is press-fitted and fixed to the press-fit groove, and thus both ends of the fixing rod coupled to at least one battery module can be inserted and coupled to the press-fit groove, and at least one battery module can be installed and fixed to the battery pack tray to prevent forward and backward movement, up and down movement, and left and right movement. Therefore, the manufacturing process of the battery pack can be simplified and the manufacturing time can be shortened.

[0035] According to this aspect of the present disclosure, the fixing rod of the present disclosure includes a pressing member configured to press the battery module toward the fixing wall of the battery pack tray so that a plurality of battery modules can be easily fixed to the battery pack tray using the pressing member. Therefore, the present disclosure can reduce the number of coupling elements and minimize the coupling processing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings illustrate preferred embodiments of the present disclosure, and together with the foregoing disclosure, are used to provide a further understanding of the technical spirit of the present disclosure. However, the present disclosure should not be interpreted as being limited to the accompanying drawings.

[0037] Figure 1 is a schematic perspective view of a battery pack according to an embodiment of the present disclosure.

[0038] Figure 2 is a schematic partially exploded perspective view of a battery pack according to an embodiment of the present disclosure.

[0039] Figure 3 It is taken along A-A' Figure 1 Schematic partial cross-sectional view of a battery module.

[0040] Figure 4 is a schematic partial cross-sectional view of a battery module of a battery pack according to another embodiment of the present disclosure.

[0041] Figure 5 is a schematic front view of some components of a battery pack according to an embodiment of the present disclosure.

[0042] Figure 6 is a schematic plan view of a battery pack according to an embodiment of the present disclosure.

[0043] Figure 7 is a schematic plan view of a battery pack according to another embodiment of the present disclosure.

[0044] Figure 8 is a schematic perspective view of some components of a battery pack according to another embodiment of the present disclosure.

[0045] Fig. 9is a schematic perspective view of some components of a battery pack according to another embodiment of the present disclosure.

[0046] Fig.10 is a schematic plan view of a battery pack according to still another embodiment of the present disclosure.

[0047] Fig.11 is a schematic perspective view of some components of a battery pack according to yet another embodiment of the present disclosure.

[0048] [Description of Reference Signs]

[0049] 300: Battery pack 100: Secondary battery

[0050] 111, 111a, 111b: electrode terminal, positive terminal, negative terminal

[0051] 200: Battery module 220: Fixing rod

[0052] 230: battery frame 231, 233: upper plate, lower plate

[0053] 230h: Fixed tube

[0054] 210, 211: Battery tray, substrate

[0055] 216, 216g, 216k: fixed wall, fixed groove, press-fit groove

[0056] 240, 242: Pressing member, pressing nut

[0057] 220k, 242k: external thread, internal thread

[0058] 250: Radiator 255h: Insert into groove

[0059] 260: Thermal pad 265h: Gas exhaust groove

[0060] 280: beam 270: battery management system DETAILED DESCRIPTION

[0061] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms or words used in the specification and the appended claims should not be interpreted as limited to the general meaning and dictionary meaning, but should be interpreted based on the meaning and concept corresponding to the technical aspects of the present disclosure based on the principle of allowing the inventor to appropriately define the terms to obtain the best interpretation.

[0062] Therefore, the embodiments described herein and shown in the drawings are only the most preferred embodiments of the present disclosure, but are not intended to fully describe the technical aspects of the present disclosure. Therefore, it should be understood that various other equivalents and modifications may be made thereto when the application is filed.

[0063] Figure 1 is a schematic perspective view of a battery pack according to an embodiment of the present disclosure. Figure 2 is a schematic partially exploded perspective view of a battery pack according to an embodiment of the present disclosure.

[0064] Reference Figure 1 and Figure 2 , a battery pack 300 of the present disclosure includes at least one battery module 200 and a fixing rod 220 coupled to the at least one battery module 200 .

[0065] Here, the battery module 200 may include a plurality of secondary batteries 100. The secondary battery 100 may be a cylindrical battery cell 100. The cylindrical battery cell 100 may include a cylindrical battery can 120 and an electrode assembly (not shown) accommodated in the battery can 120.

[0066] The cylindrical battery cell 100 may include a battery can 120 standing upright in a vertical direction. The battery can 120 may include a material having high electrical conductivity (eg, an aluminum alloy or a copper alloy).

[0067] Two electrode terminals 111 may be formed on the top and bottom of the battery can 120, respectively. Specifically, the positive terminal 111a may be formed on a flat circular upper surface on the top of the battery can 120, and the negative terminal 111b may be formed on a flat circular lower surface on the bottom of the battery can 120.

[0068] The battery can 120 may be coated with an electrical insulating member on the side.

[0069] That is, the battery can 120 is electrically connected to the electrodes (not shown) of the electrode assembly inside, and its side may be coated with an insulating film (not shown) or an electrically insulating adhesive as an insulating element to prevent electrical leakage caused by accidental contact between a conductive object and the battery can 120.

[0070] The electrode assembly (not shown) may be formed into a jelly roll shape by winding, the positive electrode includes a positive electrode plate coated with a positive electrode active material, the negative electrode includes a negative electrode plate coated with a negative electrode active material, and the separator is interposed between the positive electrode and the negative electrode. The positive electrode (not shown) may have a positive electrode tab attached thereto, and the positive electrode tab may be electrically connected to the positive terminal 111a on the top of the battery can 120. The negative electrode (not shown) may have a negative electrode tab attached thereto, and the negative electrode tab may be electrically connected to the negative terminal 111b on the bottom of the battery can 120.

[0071] A plurality of cylindrical battery cells 100 may be placed in a horizontal direction and arranged in a left-right direction (x direction).

[0072] When a plurality of secondary batteries 100 are mounted on an upper surface of the substrate 211 (described below), the plurality of secondary batteries 100 may be placed and arranged in a horizontal direction.

[0073] Here, the horizontal direction refers to a direction parallel to the ground when the cylindrical battery cell 100 is placed on the ground, and may be at least one direction on a plane perpendicular to the vertical direction.

[0074] For example, Figure 2 As shown, the battery module 200 includes 23 cylindrical battery cells 100. The cylindrical battery cells 100 may be vertically arranged within the battery frame 230 and arranged close to each other in a horizontal direction.

[0075] Return to reference Figure 1 and Figure 2 , the battery module 200 may include a battery frame 230 including an upper plate 231 and a lower plate 233. The battery frame 230 may include an electrically insulating material. For example, the electrically insulating material may be a plastic having an electrically insulating property. The plastic may preferably be polyvinyl chloride.

[0076] Specifically, the battery frame 230 may be configured to fix the plurality of secondary batteries 100 in a predetermined arrangement. For example, the battery frame 230 may include an upper plate 231 mounted on the plurality of secondary batteries 100 and a lower plate 233 mounted under the plurality of secondary batteries 100. At least one of the upper plate 231 and the lower plate 233 may include a plurality of fixing protrusions 233k to support a portion of each of the plurality of secondary batteries 100 so as to fix the position of each of the plurality of secondary batteries 100.

[0077] In another example, at least one of the upper plate 231 and the lower plate 233 may have a plurality of section grooves (not shown) to fix positions of the plurality of secondary batteries 100 .

[0078] The bus bar 221 may be mounted on the upper surface of the upper plate 231. Here, the bus bar 221 may include a body 221a disposed facing the electrode terminals 111 of the plurality of secondary batteries 100. At least one connection terminal 221c may be disposed at a portion of the body 221a of the bus bar 221 and contact the electrode terminals 111 of the plurality of secondary batteries 100.

[0079] For example, Figure 2As shown, the upper plate 231 is mounted on the battery module 200. The bus bar 221 may be mounted on the upper surface of the upper plate 231. The upper plate 231 may have three openings opened in a vertical direction so that the connection terminals 221c of the bus bar 221 and the electrode terminals 111 of the plurality of secondary batteries 100 contact each other.

[0080] The bus bar 221 may be mounted on the lower surface of the lower plate 233. Here, the bus bar 221 may include a body 221a disposed to contact the electrode terminals 111b of the plurality of secondary batteries 100. At least one connection terminal 221c may be disposed at a portion of the body 221a of the bus bar 221 and contact the electrode terminals 111 of the plurality of secondary batteries 100.

[0081] The bus bar 221 may include a conductive material, for example, a metal alloy including copper, nickel, aluminum, gold, and silver as main materials.

[0082] For example, Figure 2 As shown, the lower plate 233 is installed under the plurality of secondary batteries 100. The bus bar 221 is installed on the lower surface of the lower plate 233. The lower plate 233 may have 23 openings opened in a vertical direction so that the connection terminals 221c of the bus bar 221 and the electrode terminals 111 of the plurality of secondary batteries 100 contact each other.

[0083] However, the bus bar of the present disclosure is not necessarily limited to this shape, and a plurality of secondary batteries 100 may be electrically connected in series or in parallel by metal wires (not shown). For example, electrical connection may be established between the connection bus bar 224 described below and the plurality of secondary batteries 100 by metal wires.

[0084] The battery pack 300 may further include a connection bus bar 224 that electrically connects the plurality of battery modules 200. The connection bus bar 224 may include a conductive material. For example, the conductive material may be a metal alloy including copper, nickel, aluminum, gold, and silver as main materials. The connection bus bar 224 may be configured to contact or be connected to the bus bar 221 provided in each of the plurality of battery modules 200. For example, Figure 1 As shown, 14 connection bus bars 224 may be provided to electrically connect the plurality of battery modules 200 .

[0085] The plurality of secondary batteries 100 may be electrically connected to the connection bus bar 224 through the bus bar 221 . That is, a portion of the bus bar 221 may be electrically connected to the connection bus bar 224 .

[0086] The battery pack 300 may further include a battery management system (BMS) 270 configured to control the charge / discharge current of the battery module 200. The battery management system 270 may include a protection circuit board 271. The plurality of battery modules 200 may be electrically connected to the connection bus bar 224 through the connection terminal 272 of the protection circuit board 271.

[0087] The battery frame 230 may include a fixing pipe 230h disposed between the plurality of secondary batteries 100. The fixing pipe 230h may extend in a horizontal direction and have two open ends. For example, the fixing pipe 230h may be disposed between the upper plate 231 and the lower plate 233 of the battery frame 230.

[0088] For example, Figure 2 As shown, the fixing pipe 230 h may be disposed at the center of each of the upper plate 231 and the lower plate 233 .

[0089] For example, Figure 2 As shown, a fixing pipe 230 extending in an upward direction may be provided at the center of a lower plate 233 .

[0090] The fixing rod 220 may be a cylindrical rod extending in one direction. The fixing rod 220 may be inserted into the fixing tube 230h in a horizontal direction. The battery module 200 may be configured to be movable on the fixing rod 220 in an insertion direction of the fixing rod 220.

[0091] For example, Figure 1 As shown, the battery pack 300 can be configured to use one fixing rod 220 to fix four battery modules 200. Each of the four battery modules 200 has a fixing tube 230h, and multiple battery modules 200 can be arranged in one direction by inserting a cylindrical fixing rod 220 into each fixing tube 230h in a horizontal direction (left-right direction, x direction).

[0092] According to the configuration of the present disclosure, the battery pack 300 of the present disclosure includes a fixing rod 220 horizontally inserted into a fixing tube 230h provided in at least one battery module 200, so that a plurality of secondary batteries 100 can be arranged in one direction and fixed to prevent them from moving up and down by simply inserting the fixing rod 220. Therefore, compared with a battery pack 300 in which a plurality of battery modules 200 are fixed using a plurality of long bolts, the manufacturing time of the battery pack 300 can be effectively shortened and the weight of the battery pack 300 can be effectively reduced.

[0093] Return to reference Figure 1 and Figure 2 The battery pack 300 may further include a battery pack tray 210 including a base plate 211 and a fixing wall 216 disposed on an upper surface of the base plate 211 .

[0094] Specifically, the substrate 211 may have an area larger than the total size of the lower surface of at least one battery module 200 so that at least one battery module 200 is mounted on the substrate 211. The substrate 211 may be in a plate shape extending in a horizontal direction. The substrate 211 may have a flat upper surface.

[0095] The fixing wall 216 may extend in an upward direction from the upper surface of the substrate 211. For example, the fixing wall 216 may be provided on the periphery of the substrate 211 or at an end in a horizontal direction (x direction or y direction). Figure 1 As shown, the battery pack tray 210 may include a base plate 211 on which 16 battery modules 200 are mounted, and a fixing wall 216 extending in an upward direction (z direction) from each of the left end, the right end, and the rear end on the upper surface of the base plate 211.

[0096] The left and right ends (x direction) of the fixing rod 220 may be fixed to the fixing wall 216 provided in the battery pack tray 210. For example, Figure 1 As shown, both ends of the fixing rod 220 may be coupled to the fixing wall 216 provided in each of the left and right ends (x direction) of the battery pack tray 210 .

[0097] According to this configuration of the present disclosure, both ends of the fixing rod 220 to which at least one battery module 200 is fixed are fixed to the fixing walls 216 provided in the battery pack tray 210 of the present disclosure, so that a plurality of battery modules 200 can be fixed and coupled to the battery pack tray 210 by simply installing the plurality of battery modules 200 in the battery pack tray 210 of the battery pack 300. Therefore, the manufacturing time of the battery pack 300 can be effectively shortened, and the use of a separate fixing element (long bolt) is greatly reduced.

[0098] Figure 3 It is taken along A-A' Figure 1 Schematic partial cross-sectional view of a battery module.

[0099] Reference Figure 3 and Figure 1 The fixing wall 216 of the battery pack tray 210 may have a fixing groove 216g into which one end or the other end of the fixing rod 220 is inserted and fixed. The fixing groove 216g may be provided on the top or bottom of the fixing wall 216 or between the top and the bottom. Figure 3 As shown, the fixing wall 216 may have a fixing groove 216g that is recessed downward from a portion of the upper surface. In this case, an inner surface 216h of the fixing groove 216g may be configured to support the end of the fixing rod 220 in the y direction.

[0100] According to this configuration of the present disclosure, the fixing groove 216g is partially recessed in the downward direction from the top of the fixing wall 216 of the battery pack tray 210, and one end or the other end of the fixing rod 220 can be inserted and fixed to the fixing groove 216g, so that at least one battery module 200 can be installed on the battery pack tray 210 by inserting both ends of the fixing rod 220 coupled to the at least one battery module 200 into the fixing groove 216g provided in the fixing wall 216 of the battery pack tray 210. The fixing rod 220 can install and fix at least one battery module 200 on the battery pack tray 210 to prevent forward and backward movement and left and right movement. Therefore, the manufacturing process of the battery pack 300 can be simplified and the manufacturing time can be reduced.

[0101] Figure 4 is a schematic partial cross-sectional view of a battery module of a battery pack according to another embodiment of the present disclosure.

[0102] Reference Figure 4 and Figure 1 , the press-fit groove 216k may be recessed in the inward direction in the fixing wall 216 of the battery pack tray 210, and one end or the other end of the fixing rod 220 may be press-fitted and fixed into the press-fit groove 216k. Figure 4 As shown, a press-fit groove 216k recessed in a downward direction from the upper surface may be provided on the top of the fixing wall 216. An inner surface 216h of the press-fit groove 216k may be formed around the outer surface of the end of the fixing rod 220. In this case, the inlet side (top) of the press-fit groove 216k may be narrower than the cross-sectional diameter of the fixing rod 220.

[0103] That is, due to the narrow entrance side of the press-fit groove 216k, one end or the other end of the fixing rod 220 can be press-fitted. Therefore, the fixing rod 220 can be fixed to the press-fit groove 216k to prevent sliding or moving.

[0104] According to this configuration of the present disclosure, the press-fit groove 216k is recessed in the inward direction on the top of the fixing wall 216 of the battery pack tray 210, and one end or the other end of the fixing rod 220 is press-fitted and fixed to the press-fit groove 216k, so that both ends of the fixing rod 220 coupled to at least one battery module 200 can be inserted and coupled to the press-fit groove 216k, and at least one battery module 200 can be installed and fixed to the battery pack tray 210 to prevent forward and backward movement, up and down movement, and left and right movement. Therefore, the manufacturing process of the battery pack 300 can be simplified and the manufacturing time can be reduced.

[0105] Figure 5 is a schematic front view of some components of a battery pack according to an embodiment of the present disclosure. Figure 6is a schematic plan view of a battery pack according to an embodiment of the present disclosure. Here, for the convenience of describing the accompanying drawings, Figure 5 A press nut 242 is shown in vertical cross-section.

[0106] and Figure 1 Refer to Figure 5 and Figure 6 The fixing rod 220 may include a pressing member 240. The pressing member 240 may be configured to press the battery module 200 toward the fixing wall 216 of the battery pack tray 210. For example, the pressing member 240 may be left and right ( Figure 1 A spring and a nut are movably arranged on the fixing rod 220 (in the x direction).

[0107] For example, Figure 1 As shown, one fixing rod 220 may include two pressing members 240. Each of the two pressing members 240 may be configured to move in a direction K1 toward the fixing wall 216 of the battery pack tray 210 to which both ends of the fixing rod 220 are coupled.

[0108] The pressing member 240 may press the battery module 200 by moving toward the fixed wall 216 of the battery pack tray 210. The battery module 200 may be in close contact with the fixed wall 216 of the battery pack tray 210 by the pressing member 240. The battery module 200 may be fixed between the pressing member 240 and the fixed wall 216 of the battery pack tray 210 by the pressing force.

[0109] Return to reference Figure 1 and Figure 5 , the external thread 220k may be formed on at least a portion of the outer surface of the fixing rod 220. For example, Figure 5 As shown, the external threads 220 k may be provided at both sides relative to the center of the fixing rod 220 .

[0110] The pressing member 240 may be a pressing nut 242 having an internal thread 242k to move along the external thread 220k of the fixing rod 220. Figure 5 As shown, the fixing rod 220 may have two pressing nuts 242 configured to move left and right along the two external threads 220 k, respectively. That is, the pressing nuts 242 may press at least one battery module 200 to fix at least one battery module 200 to contact the fixing wall 216 .

[0111] According to the configuration of the present disclosure, the fixing rod 220 includes a pressing member 240 configured to press the battery module 200 toward the fixing wall 216 of the battery pack tray 210, thereby easily fixing the plurality of battery modules 200 into the battery pack tray 210 using the pressing member 240. Therefore, the present disclosure can reduce the number of coupling elements and minimize the coupling process time.

[0112] Figure 7 is a schematic plan view of a battery pack according to another embodiment of the present disclosure. Figure 8 is a schematic perspective view of some components of a battery pack according to another embodiment of the present disclosure.

[0113] Reference Figure 7 and Figure 8 ,and Figure 1 Compared with the battery pack 300, Figure 7 The battery pack 300A further includes a heat sink 250 and a thermal pad 260. The remaining components are Figure 1 The components of the battery pack 300 are the same.

[0114] A battery pack 300A according to another embodiment of the present disclosure may include two or more fixing rods 220. For example, Figure 7 As shown, four fixing bars 220 may be installed in the battery pack tray 210 .

[0115] Two or more battery modules 200 may be connected by a fixing tube ( Figure 2 230h) is penetrated by each of the two or more fixing rods 220. For example, Figure 7 As shown, four battery modules 200 may be respectively inserted into four fixing rods 220 through fixing pipes 230h.

[0116] The battery pack 300A may further include a heat sink 250 interposed between two or more battery modules 200. That is, each of the left and right sides of the heat sink 250 may be disposed in contact with the outer side surface of the battery module 200. Here, the heat sink 250 may have a coolant channel (not shown) through which the coolant moves. For example, the heat sink 250 may be hollow and in the shape of a box having a metal outer wall 253.

[0117] The radiator 250 may have a coolant therein or may be continuously supplied with coolant from the outside. For example, the coolant may be water, a Freon-based coolant, ammonia, acetone, methanol, ethanol, naphthalene, sulfur, or mercury. The radiator may be configured to have a coolant therein or to continuously supply coolant from the outside and simultaneously force the heated coolant out. A pump may be used to supply the coolant or force the coolant out.

[0118] The heat sink 250 may have a coupling structure into which each of the two or more fixing rods 220 is inserted. Figure 7 and Figure 8 As shown, the coupling structure may have four insertion grooves 255h recessed in an upward direction from the lower surface of the heat sink 250. Portions of the four fixing rods 220 may be respectively inserted into the four insertion grooves 255h.

[0119] Due to the pressing of the pressing member 240 , the contact area between the two or more battery modules 200 and the radiator 250 may increase.

[0120] According to the configuration of the present disclosure, the battery pack 300A further includes a heat sink 250 interposed between two or more battery modules 200, so that the heat sink 250 can be easily coupled and installed between the plurality of battery modules 200. The coupling strength between the plurality of battery modules 200 pressed by the pressing member 240 and the heat sink 250 can be effectively increased, thereby greatly improving the cooling efficiency of the battery pack 300A.

[0121] Fig. 9 is a schematic perspective view of some components of a battery pack according to another embodiment of the present disclosure.

[0122] and Figure 7 Refer to Fig. 9 According to another embodiment, a battery pack 300A may include a thermal pad 260 between the battery module 200 and the heat sink 250. Specifically, the thermal pad 260 may include a material having high thermal conductivity at least in part. For example, the material having high thermal conductivity may be a silicone polymer.

[0123] The thermal pad 260 may extend in the upward and downward and forward and backward directions. For example, the thermal pad 260 may be configured to surround the left and right sides of the heat sink 250. Alternatively, the thermal pad 260 may be added to the left and right areas of the heat sink 250 corresponding to the battery module 200. For example, Figure 7 As shown, eight thermal pads 260 may be added to the left and right sides of the heat sink 250. The thermal pad 260 may have a size corresponding to one side of eight battery modules 200.

[0124] A gas discharge groove 265h may be formed to be recessed in the inward direction of the thermal pad 260. Specifically, the gas discharge groove 265H may extend linearly from the top to the bottom or from the front to the rear end of the thermal pad 260, or may extend in four directions from the top to the bottom and from the front to the rear end. Among the plurality of secondary batteries 100 of the battery module 200, a portion provided with a discharge structure (provided with a positive terminal) may be provided to contact the surface of the gas discharge groove 265h forming the thermal pad 260. For example, as Fig. 9 As shown, the thermal pad 260 may have a gas discharge groove 265h extending in upward, downward, forward, and rearward directions.

[0125] Fig.10 is a schematic plan view of a battery pack according to still another embodiment of the present disclosure. Fig.11 is a schematic perspective view of some components of a battery pack according to yet another embodiment of the present disclosure.

[0126] Reference Fig.10 and Fig.11 ,and Figure 7 Compared with the battery pack 300A of the embodiment, the battery pack 300B according to another embodiment may further include a crossbeam 280 disposed on the base plate 211 of the battery pack tray 210. The remaining elements are the same as Figure 7 The components of the battery pack 300A are the same.

[0127] Specifically, the crossbeam 280 may be coupled to the plurality of fixing rods 220. The crossbeam 280 may have a coupling structure into which a portion of each of two or more fixing rods 220 is inserted. Fig.10 and Fig.11 As shown, the coupling structure may have four coupling grooves 280h recessed in an upward direction from the lower surface of the cross beam 280. Parts of the fixing rod 220 may be respectively inserted into the four coupling grooves 280h.

[0128] The ends of the cross beam 280 may be configured to be connected to the outer sidewall 218 disposed in the battery pack tray 210. For example, Fig.10 As shown, a cross beam 280 extending in a front-rear direction may be provided at the center of the battery pack tray 210. A rear end of the cross beam 280 may be coupled to an outer side wall 218 provided in the battery pack tray 210.

[0129] According to this configuration of the present disclosure, the battery pack also includes a cross beam 280 disposed on the substrate 211 of the battery pack tray 210 and configured to be connected to a plurality of fixing rods 220, and thus the cross beam 280 serves as the central axis of the structure of the battery pack 300B when connected to the plurality of fixing rods 220, thereby effectively increasing the mechanical strength of the entire battery pack 300B, and specifically, the fixing rods 220 can be effectively prevented from being deformed or damaged due to external impacts through the connection between the cross beam 280 and the plurality of fixing rods 220.

[0130] The electronic device according to the present disclosure may include the battery pack 300. The electronic device (not shown) may include a housing (not shown) in which the battery pack 300 is accommodated.

[0131] A vehicle (not shown) according to the present disclosure may include a battery pack 300. The vehicle may be, for example, an electric vehicle having a motor (not shown) using the battery pack 300 as a power source.

[0132] Terms indicating directions such as up, down, left, right, front, and rear as used herein are used only for convenience of description, and it is obvious to those skilled in the art that the terms may change depending on the position of the element or observer.

[0133] Although the present disclosure has been described above with respect to a limited number of embodiments and drawings, the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto within the technical aspects of the present disclosure and the equivalent scope of the appended claims.

[0134] Industrial Applicability

[0135] The present disclosure relates to a battery pack with provided manufacturing efficiency. In addition, the present disclosure can be used in industries related to electronic devices and vehicles including battery packs.

[0136] This application claims the benefit of Korean Patent Application No. 10-2019-0095072 filed on August 5, 2019, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

Claims

1. A battery pack, comprising: at least one battery module, the at least one battery module comprising a plurality of secondary batteries, the plurality of secondary batteries being placed and arranged in a horizontal direction and electrically connected to each other, and a battery frame having a fixing tube configured to fix the plurality of secondary batteries in a predetermined arrangement, the fixing tube being disposed between the plurality of secondary batteries, extending in the horizontal direction and having two open ends; and a fixing rod extending in one direction and inserted into the fixing pipe in the horizontal direction, A battery pack tray comprising a base plate on which the at least one battery module is mounted and a fixing wall extending in an upward direction from an upper surface of the base plate, and Both ends of the fixing rod are fixed to the fixing wall provided in the battery pack tray, Wherein, the fixing rod includes two pressing members, and each of the two pressing members is configured to move in the direction of the fixed wall of the battery pack tray to which the two ends of the fixing rod are connected and press the battery module toward the fixed wall of the battery pack tray to fix the battery module to be in contact with the fixed wall.

2. The battery pack according to claim 1, wherein: The fixing wall includes a fixing groove partially recessed in a downward direction from a top of the fixing wall of the battery pack tray, and one end or the other end of the fixing rod is inserted into and fixed to the fixing groove.

3. The battery pack according to claim 1, wherein: The fixing wall includes a press-fit groove recessed in an inward direction from a top of the fixing wall of the battery pack tray, and one end or the other end of the fixing rod is press-fitted and fixed to the press-fit groove.

4. The battery pack according to claim 1, wherein: An external thread is formed in at least a portion of an outer surface of the fixing rod, and The pressing member is a pressing nut having an internal thread to move along the external thread of the fixing rod.

5. The battery pack according to claim 1, wherein: The battery pack further includes a heat sink interposed between two or more battery modules, Two or more fixing rods are provided, The two or more battery modules are respectively penetrated by the two or more fixing rods through the fixing tubes, and Two or more insertion grooves recessed in an upward direction are provided below the heat sink, and a portion of each of the two or more fixing rods is inserted into the two or more insertion grooves.

6. The battery pack according to claim 5, wherein: A thermal pad is provided between the battery module and the heat sink, and The thermal pad has a gas discharge groove extending in an upward and downward direction and a forward and rearward direction and being recessed in an inward direction of the thermal pad.

7. The battery pack according to claim 6, further comprising: A cross beam is disposed on the base plate of the battery pack tray and is configured to be coupled to the two or more fixing bars.

8. The battery pack according to claim 1, wherein: The battery frame includes an upper plate mounted on the plurality of secondary batteries and a lower plate mounted under the plurality of secondary batteries, and at least one of the upper plate and the lower plate includes a plurality of fixing protrusions to support a portion of each of the plurality of secondary batteries. 9 . An electronic device comprising the battery pack according to claim 1 .

10. A vehicle comprising the battery pack according to any one of claims 1 to 8.

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