A battery pack that combines battery modules and rigid beams and is assembled in reverse

Abstract

According to the present invention, a battery pack is provided, which includes a plurality of battery modules and a battery pack shell, wherein the battery modules can be fixed and installed in the battery pack shell, wherein the battery pack shell includes: a battery pack tray, which is located below the battery modules; and a battery pack cover, which is mutually connected to the battery pack tray to cover the battery modules, wherein each battery module includes: battery cells, which are arranged in one direction; a module shell, which accommodates the battery cells in its internal space; and a rigid beam, which is arranged between the battery cells in the module shell and is fixedly connected to the battery pack cover.

Description

Technical Field

[0001] The present disclosure relates to a battery pack, and more particularly, to a battery pack having improved mechanical rigidity and space utilization.

[0002] This application claims the priority of Korean Patent Application No. 10-2019-0096282 filed in Korea on August 7, 2019, the disclosure of which is incorporated herein by reference. Background Art

[0003] Unlike primary batteries that cannot be charged, secondary batteries refer to batteries that can be charged and discharged, and are used not only as power sources for small high-tech electronic devices such as mobile phones, PDAs, or laptop computers, but also as power sources for energy storage systems (ESS), electric vehicles (EV), or hybrid electric vehicles (HEV).

[0004] Currently widely used secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, etc. The operating voltage of a unit secondary battery cell, that is, a unit battery cell, is about 2.5V to 4.2V. Therefore, if a higher output voltage and a larger energy capacity are required, a plurality of battery cells can be connected in series to construct a battery module, or two or more battery modules can be connected in series or in parallel and other components can be added to construct a battery pack. For example, a battery module may refer to a device in which a plurality of secondary batteries are connected in series or in parallel, and a battery pack may refer to a device in which battery modules are connected in series or in parallel to increase capacity and output.

[0005] In addition to the battery module, the battery pack may further include a cooling device for properly maintaining the temperature of the battery module, a control device for monitoring the operating state of the battery module, and a battery pack case for packaging the same.

[0006] Meanwhile, in the case of a battery pack for an electric vehicle, since the installation space of the battery pack is limited depending on the overall length and width of the electric vehicle, it is important to increase energy density by mounting battery modules and other components inside the battery pack case in as space-efficient a manner as possible and to sufficiently ensure mechanical rigidity.

[0007] However, in the conventional assembly structure of a battery pack, generally, as Figure 1As shown, on the upper surface of the battery tray 1 corresponding to the bottom surface of the battery case, the battery module 2 is arranged between the cross beams 3 and is fixed to the battery tray 1 by a common bolt fastening method. Here, the cross beam 3 refers to a structure formed integrally with the battery tray 1 or welded to the battery tray 1 to increase the rigidity of the battery case. The cross beam 3 has recently been widely adopted in the battery case because it can be used to prevent deformation of the battery case, such as twisting, when an external impact is applied to the battery case.

[0008] Generally, each battery module 2 may be fixed to the battery pack tray 1 at a total of four locations at the front corner and the rear corner by long bolts, and a radiator 4 for cooling is further provided at the lower portion of each battery module 2. In addition, although not shown, an intermediate bus bar for electrically connecting the battery modules 2 to each other is attached to each battery module using bolts.

[0009] However, some problems with the assembly structure of conventional battery packs have been pointed out recently. Among them, two problems that are often pointed out are as follows: (i) the energy density of the battery pack is reduced due to the unnecessary gap between the battery module and the cross beam and the space occupied by the cross beam; and (ii) due to the fastening structure between the battery pack tray and the plurality of bolts for fixing the battery module 2, the utilization rate of the space under the battery pack case is reduced (when the radiator is installed under the battery module, the bolt fastening structure may be disturbed and the cooling water input / output pipeline may be complicated), and the assembly process is complicated.

[0010] Therefore, development of a battery pack to which an assembly structure capable of solving the above-mentioned problems is applied is becoming an issue. Summary of the invention

[0011] Technical issues

[0012] The present disclosure is designed to solve the problems of the related art, and thus the present disclosure aims to provide a battery pack that can improve energy density, mechanical rigidity, and space utilization for mounting battery modules and other components.

[0013] These and other purposes and advantages of the present disclosure can be understood from the following detailed description, and will become more fully apparent from the exemplary embodiments of the present disclosure. In addition, it will be easily understood that the purposes and advantages of the present disclosure can be achieved by the means shown in the appended claims and their combinations.

[0014] Technical Solution

[0015] In one aspect of the present disclosure, a battery pack is provided, the battery pack comprising a plurality of battery modules and a battery pack case, the battery modules being fixedly mounted in the battery pack case,

[0016] Wherein, the battery shell includes: a battery pack tray, which is located at the lower part of the battery module; and a battery pack cover, which is connected to the battery pack tray to cover the battery module, and each battery module in the battery module is fixedly connected to the battery pack cover, and each battery module in the battery module includes: battery cells, which are arranged in one direction; a module shell, which is used to accommodate the battery cells in its internal space; and a rigid beam, which is arranged between the battery cells in the module shell.

[0017] The rigid beam of each battery module and the pack cover may be integrally connected by a first fastening member vertically fastened at the outer portion of the pack cover.

[0018] The rigid beam may be located in the middle of the battery cells based on the arrangement order of the battery cells, and is disposed such that both side surfaces of the rigid beam respectively face one surface of an adjacent battery cell, thereby preventing volume expansion of the battery cells.

[0019] The module housing may include a base plate located at a lower portion of the battery cell to support the battery cell, and the base plate may have a flow path provided therein so that a coolant flows through the flow path.

[0020] The battery pack cover may include a cooling pipe embedded in the battery pack cover along an edge area of ​​the battery pack cover, the substrate may include a cooling water port configured to communicate with the flow path and formed to extend vertically, and the cooling water port may be directly connected to the cooling pipe in an up and down direction.

[0021] The pack cover may include an uneven portion fitted into an edge of the pack tray, and a cooling pipe installation portion formed to extend into the pack cover so that the cooling pipe is inserted into the cooling pipe installation portion.

[0022] Each battery module may include an electrode terminal protruding horizontally on a side surface of the module shell, the battery pack cover includes at least one terminal connection unit, the at least one terminal connection unit is located at the inner surface of the top end of the battery pack cover, and the electrode terminal of one battery module and the electrode terminal of another battery module can be electrically connected through the terminal connection unit.

[0023] The terminal connection unit may include an insulating bracket fixedly coupled to an inner surface of the pack cover, and an intermediate bus bar mounted to the bracket and electrically connected to the electrode terminal.

[0024] The electrode terminal and the terminal connection unit may be integrally connected by a second fastening member vertically inserted into the electrode terminal and the terminal connection unit.

[0025] The module case may further include a terminal support configured to support a lower portion of the electrode terminal, and each battery module may be fixed to the battery pack cover when the terminal support, the electrode terminal, and a terminal connection unit are integrally connected by a second fastening member.

[0026] The plurality of battery modules may be arranged in two rows such that electrode terminals of the plurality of battery modules are disposed to face each other based on a center portion of the battery pack case.

[0027] In another aspect of the present disclosure, a vehicle is provided, the vehicle comprising the battery pack described above. The vehicle may include an electric vehicle (EV) or a hybrid electric vehicle (HEV).

[0028] Beneficial Effects

[0029] According to the embodiments of the present disclosure, it is possible to provide a battery pack that can improve energy density, mechanical rigidity, and space utilization for mounting a battery module and other components.

[0030] According to another embodiment of the present disclosure, by using a top cover, the battery module may be electrically connected and mechanically fixed at the same time.

[0031] According to still another embodiment of the present disclosure, by using a top cover and a base plate of a module case as a cooling water circulation space, it is possible to simplify the configuration of a cooling device and improve installation space efficiency.

[0032] Other effects of the present disclosure can be understood through the following description and will be more clearly understood through the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a view schematically showing an example in which a conventional battery pack is assembled.

[0034] Figure 2 is a perspective view schematically showing a battery pack according to an embodiment of the present disclosure.

[0035] Figure 3 It is shown Figure 2 A partially exploded perspective view of a battery pack.

[0036] Figure 4 is a perspective view schematically showing a battery module according to an embodiment of the present disclosure.

[0037] Figure 5 It is along Figure 2 A cross-sectional view taken along line II'.

[0038] Figure 6 It is along Figure 2 A cross-sectional view taken along line II-II'.

[0039] Figure 7 It is along Figure 2 A cross-sectional view taken along line III-III'.

[0040] Figure 8 It is shown Figure 7 Magnified view of area A.

[0041] Fig. 9 is a reference diagram for illustrating an assembly sequence of a battery pack according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] 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 used in the specification and the appended claims should not be interpreted as limited to the general meaning and dictionary meaning, but are 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 for the best interpretation. Therefore, the descriptions presented herein are only preferred examples for the purpose of illustration only and are not intended to limit the scope of the present disclosure, so it should be understood that other equivalents and modifications may be made thereto without departing from the scope of the present disclosure.

[0043] Figure 2 is a perspective view schematically showing a battery pack according to an embodiment of the present disclosure, Figure 3 It is shown Figure 2 A partially exploded perspective view of a battery pack. Figure 4 is a perspective view schematically showing a battery module according to an embodiment of the present disclosure.

[0044] Referring to these drawings, a battery pack 10 according to an embodiment of the present disclosure includes a plurality of battery modules 100 and a battery pack case 200 for accommodating the battery modules 100. The battery pack case 200 includes: a battery pack tray 210 for providing a space in which the plurality of battery modules 100 can be installed; and a battery pack cover 220 coupled to the battery pack tray 210 to cover the entire battery module 100.

[0045] As described in detail below, the battery pack 10 according to the present disclosure replaces the beam frame (see Figure 1 ) is incorporated into the battery module 100, and also mechanically fixes and electrically connects the battery modules 100 to each other integrally with the battery pack cover 220, thereby having advantages such as increasing the space utilization of the battery pack tray 210, simplifying the assembly process and reducing the number of fastening parts.

[0046] First, the battery module 100 included in the battery pack 10 will be described. The battery module 100 includes a battery cell 110, a module case 120 for accommodating the battery cell 110 in an inner space thereof, and electrode terminals 150a, 150b exposed outside the module case 120.

[0047] In this embodiment, the battery cell 110 may be a pouch-type secondary battery cell. The pouch-type battery cell 110 may be arranged in one direction in an upright state so that the wide surfaces of the pouch-type battery cell 110 face each other in the internal space of the module shell 120. Although not shown in the drawings for convenience, each battery module 100 has a constant capacity and output voltage by connecting the battery cells 110 in series and / or in parallel. For reference, it is also possible to replace the battery cell 110 with a cylindrical secondary battery cell or a rectangular secondary battery cell.

[0048] like Figure 4 As shown, the module shell 120 may include: a substrate 121 and a top plate 122, which are used to cover the lower part and the upper part of the battery cell 110, respectively; a pair of side plates 123, which are arranged at the outermost part of the battery cell 110 according to the arrangement direction of the battery cell 110; and a front cover 124 and a rear cover 125, which are used to cover the front side and the rear side of the battery cell 110, respectively.

[0049] In particular, the base plate 121 forming the bottom surface of the module housing 120 functions like a conventional heat sink. For example, a flow path through which cooling water can flow is provided inside the base plate 121 so that the base plate 121 can directly cool the battery cells 110, and a cooling water port 121a is provided at an edge of the base plate to allow cooling water to flow in and out of the flow path.

[0050] The cooling water port 121a may vertically extend from one side of the edge of the base plate 121 to be directly connected to a cooling pipe 224 of a pack cover 220 explained later. Cooling water may be supplied to the base plate 121 of each battery module 100 by means of the cooling water supply and discharge structure.

[0051] The conventional battery pack 10 mainly has a cooling configuration in which a thermal pad and a heat sink are sequentially arranged under the battery module 100. However, in the present disclosure, the heat sink is coupled to the base plate 121 of the module housing 120, thereby reducing the heat transfer path, reducing the number of parts, and saving the installation space of the cooling device compared to the conventional technology.

[0052] The front cover 124 and the rear cover 125 are located in front and rear of the battery cell 110 so that electrode leads or components such as an internal connection board (ICB) of the battery cell 110 are not exposed to the outside.

[0053] The electrode terminals 150a, 150b include a positive electrode terminal 150a and a negative electrode terminal 150b, and the electrode terminals 150a, 150b are located at the outer side of the top of the front cover 124 to have a rectangular plate shape so that the wide surfaces of the electrode terminals 150a, 150b are placed horizontally, so that bolts can be inserted into the electrode terminals 150a, 150b in the up and down directions.

[0054] The electrode terminals 150a, 150b may be placed on and supported by the terminal support 126. Here, the terminal support 126 is a portion protruding from the front cover 124 and serves as a location where lower portions of the electrode terminals 150a, 150b are supported and bolts of the battery module are fastened.

[0055] The terminal support 126 may be provided to extend along the width direction of the front cover 124 , and a hole into which a bolt is inserted may be formed in the terminal support 126 at the location where the positive electrode terminal 150 a and the negative electrode terminal 150 b are located.

[0056] Although not shown, holes may be provided in the terminal support 126 so that shoulder bolts are inserted into other positions than the positions where the electrode terminals 150 a , 150 b are located. In this way, the shoulder bolts may be fastened to the battery pack cover 220 .

[0057] The pair of side plates 123 may serve to externally compress and support the battery cells 110 at the outermost battery cells 110 in the arrangement direction of the battery cells 110 .

[0058] At the same time, if Figure 5 As shown, the battery module 100 of the present disclosure further includes a rigid beam 130 located inside the module housing 120. The rigid beam 130 is configured to have a predetermined thickness and an area corresponding to the wide surface of the battery cell 110, and may be preferably located in the middle of the battery cell 110 based on the arrangement order of the battery cell 110.

[0059] In the module housing 120, the battery cells 110 are arranged so that the battery cells 110 are in close contact with both sides of the rigid beam 130. One group of battery cells 110 is located between the rigid beam 130 and one side plate 123, and another group of battery cells 110 is located between the rigid beam 130 and another side plate 123. A buffer pad 140 may be further disposed between the battery cells 110 and the rigid beam 130.

[0060] The rigid beam 130 is disposed in the middle of the battery cell 110, and even if the battery cell 110 expands (swells) in volume during charging and discharging, the rigid beam 130 plays a role in absorbing the expansion pressure of the battery cell 110, so that the side plate 123 of the module housing is subjected to less pressure. Therefore, the rigid beam 130 can effectively prevent the module housing 120 from being deformed.

[0061] In addition, when assembling the battery pack 10, the top end of the rigid beam 130 of the battery module 100 may be integrally fastened by the battery pack cover 220 and the first fastening member B1. A long bolt may be used as the first fastening member B1, and the long bolt may be vertically fastened to the rigid beam 130 at the outside of the battery pack cover 220. As a result, the battery module 100 may be fixed to the battery pack cover 220, and the battery pack cover 220 may also be supported by the rigid beam 130 to enhance impact resistance.

[0062] As described above, since the rigid beam 130 is incorporated into the battery module 100, it is possible to solve problems caused by the beam frame which is a structure for reinforcing the rigidity of the battery pack tray 210 as mentioned in the background technology, namely, conventional problems such as the occurrence of unnecessary gaps between the battery module 100 and the beam and a reduction in the energy density of the battery pack 10 caused by the space occupied by the beam.

[0063] Next, we will refer to Figure 2 , Figure 3 as well as Figures 6 to 8 The electrical connection and fixing structure between the battery modules 100 inside the battery pack case 200 is further described.

[0064] The battery modules 100 are arranged in two rows on the battery pack tray 210, and the electrode terminals 150a, 150b may be arranged to face each other based on the center of the battery pack case 200. In this embodiment, a total of four battery modules 100 are provided, but the number of the battery modules 100 may be increased or decreased. The positive electrode terminal of one battery module 100 may be connected to the negative electrode terminal of another adjacent battery module 100 by means of the terminal connection unit 221.

[0065] At least one terminal connection unit 221 may be provided at the inner surface of the top end of the battery pack cover 220. Specifically, the terminal connection unit 221 according to this embodiment includes: an insulating bracket 221a fixedly coupled to the inner surface of the top end of the battery pack cover 220; and an intermediate bus bar 221b made of a metal material, which is mounted to the insulating bracket 221a and electrically connected to the electrode terminals 150a, 150b.

[0066] For example, Figure 6 As shown, when the upper part of the battery module 100 is covered by the battery pack cover 220, the positive electrode terminal and the negative electrode terminal of the two battery modules 100 adjacent in the Y-axis direction can be respectively in contact with one end and the other end of the terminal connection unit 221 of the battery pack cover 220. In other words, when the positive electrode terminal of one battery module 100 and the negative electrode terminal of another battery module 100 are in contact with both ends of the middle bus bar 221b of the terminal connection unit 221, the two battery modules 100 can be connected in series. In addition, the positive electrode terminal and the negative electrode terminal of the two battery modules 100 facing each other in the X-axis direction can also be connected in the same manner as described above.

[0067] The electrode terminals 150a, 150b and the terminal connection unit 221 may be integrally fastened to a second fastening member B2 for reliability of electrical connection of the battery module 100. The second fastening member B2 may be a bolt vertically inserted into the electrode terminals 150a, 150b and the terminal connection unit 221 to fasten them.

[0068] At this time, the bolts are inserted at the lower portion of the terminal support 126 to fasten the electrode terminals 150a, 150b to the terminal support 126. Therefore, the electrical connection of the battery module 100 and the fixation to the battery pack cover 220 can be ensured at one time, thereby reducing the bolt fastening points and simplifying the assembly process. In addition, since the battery module 100 is fixed to the battery pack cover 220, the bolt fastening space between the battery module 100 and the battery pack tray 210 can be eliminated, thereby improving the space utilization of the upper surface of the battery pack tray 210.

[0069] In this embodiment, the battery modules 100 are arranged in two rows inside the battery pack housing 200, but the present disclosure is not necessarily limited thereto. For example, the battery modules 100 may also be arranged in three rows or four rows or more rows. At this time, the battery modules 100 may be arranged in any manner as long as the electrode terminals 150a and 150b of the battery modules 100 are arranged adjacent to each other, and when the upper portion of the battery module 100 is covered by the battery pack cover 220, the electrode terminals 150a and 150b may be selectively connected by the terminal connection unit 221.

[0070] Meanwhile, the pack cover 220 according to this embodiment may include a cooling pipe 224 embedded in the pack cover 220 along an edge region thereof. The cooling pipe 224 may be directly connected to the cooling water port 121a provided to the base plate 121 of each battery module 100.

[0071] Specifically, Figure 7 and Figure 8 As shown, the battery pack cover 220 includes an uneven portion 222 that is fitted into the edge of the battery pack tray 210, and a cooling pipe mounting portion 223 that extends from the uneven portion 222 into the battery pack cover 220. An O-ring 230 made of rubber and configured to enhance sealing performance may be further disposed at a coupling portion between the battery pack cover 220 and the battery pack tray 210.

[0072] The cooling pipe installation portion 223 has a hollow space provided to extend along the circumferential direction of the battery pack cover 220, and the cooling pipe 224 can be inserted into the hollow space. As an alternative embodiment, in order to eliminate the inconvenience of inserting the cooling pipe 224 into the cooling pipe installation portion 223, the cooling pipe 224 can be omitted by forming the area of ​​the cooling pipe installation portion 223 into a hollow structure.

[0073] The base plate 121 of each battery module 100 includes a port assembly portion 121b that further extends outward based on the vertical surface of the rear cover. The cooling water port 121a may be disposed upward in a vertical direction at the port assembly portion 121b.

[0074] The port assembling portion 121b is disposed directly below the cooling pipe mounting portion 223 of the battery pack cover 220, and the cooling water port 121a is directly connected to the cooling pipe 224 of the battery pack cover 220. Although not shown, a fixing connector and a sealing member may be further used to ensure fastening and sealing performance between the cooling water port 121a and the cooling pipe 224.

[0075] According to this configuration of the present disclosure, cooling water can be supplied to the substrate 121 of each battery module 100 while circulating along the cooling pipe 224 of the battery pack cover 220 in the circumferential direction of the battery pack cover 220, thereby absorbing the heat of the battery cell 110 during charging and discharging to maintain the battery cell 110 at an appropriate temperature.

[0076] In particular, in the present disclosure, since the cooling pipe 224 is included in the battery pack cover 220 and the cooling water port 121a of the base plate 121 is simply connected to the cooling pipe 224 at the shortest distance, the number of components such as additional connecting pipes or hoses for circulating cooling water can be greatly reduced. In addition, since there are no connecting pipes or hoses on the battery pack tray 210, the battery module 100 and other electronic components can be installed more easily.

[0077] Next, we will refer to Fig. 9 An assembly example of the battery pack 10 according to the embodiment of the present disclosure is briefly supplemented.

[0078] Unlike the assembling method of the conventional battery pack 10, the battery pack 10 according to the present disclosure is assembled such that the battery module 100 is fixed to the pack cover 220. In this regard, the battery pack 10 of the present disclosure may be referred to as a reverse module assembly type.

[0079] First, the battery pack cover 220 is turned over, and the battery modules 100 are disposed in the battery pack cover 220. At this time, the electrode terminals 150a, 150b of each battery module 100 are aligned with the corresponding terminal connection units 221 of the battery pack cover 220 in the up-down direction, and the cooling water ports 121a are prepared to be inserted into the cooling pipes 224 of the battery pack cover 220.

[0080] Thereafter, the terminal support 126 and the electrode terminals 150 a , 150 b of each battery module 100 and the terminal connection unit 221 of the pack cover 220 are integrally fastened by using the second fastening member B2 to ensure electrical connection and mechanical fixation of each battery module 100 .

[0081] Thereafter, the O-ring 230 is placed in the uneven portion 222 of the pack cover 220 , and then the edge portion of the pack tray 210 is coupled to the uneven portion 222 by fitting.

[0082] Thereafter, the battery pack 10 is turned over again, and the rigid beam 130 of each battery module 100 and the pack cover 220 are integrally fastened using the first fastening member B1.

[0083] The battery pack 10 according to the present disclosure as described above may further include various devices such as a battery management system (BMS), a current sensor, and a fuse for controlling the charging and discharging of the battery module 100. The battery pack 10 may be applied not only to vehicles such as electric vehicles or hybrid electric vehicles, but also to energy storage systems or other information technology (IT) products.

[0084] The present disclosure has been described in detail. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the present disclosure, are given by way of illustration only, since various changes and modifications within the scope of the present disclosure will become apparent to those skilled in the art from the detailed description.

[0085] At the same time, even if terms expressing directions such as "up", "down", "left" and "right" are used in the specification, these terms are only for convenience of description and can be expressed differently depending on the position of the observer or the object, which is obvious to those skilled in the art.

Claims

1. A battery pack, comprising a plurality of battery modules and a battery pack case, wherein the battery modules are fixedly mounted in the battery pack case, in, The battery pack housing comprises: a battery pack tray located at a lower portion of the battery module; and a battery pack cover coupled to the battery pack tray to cover the battery module, and Each of the battery modules is fixedly coupled to the battery pack cover and includes: Battery cells arranged in one direction; a module housing for accommodating the battery cells in an inner space thereof; and a rigid beam disposed between the battery cells in the module housing, wherein the rigid beam of each battery module and the battery pack cover are integrally connected by a first fastening member, and the first fastening member is vertically fastened at the outside of the battery pack cover, The rigid beam is located in the middle of the battery cells based on the arrangement order of the battery cells, and is arranged so that both side surfaces of the rigid beam face one surface of an adjacent battery cell respectively, thereby preventing the volume expansion of the battery cells.

2. The battery pack according to claim 1, wherein: The module housing includes a base plate located at a lower portion of the battery cell to support the battery cell, and The base plate has a flow path provided therein such that a coolant flows through the flow path.

3. The battery pack according to claim 2, wherein: The battery pack cover includes a cooling tube embedded in the battery pack cover along an edge region of the battery pack cover, The base plate includes a cooling water port configured to communicate with the flow path and formed to extend vertically, and The cooling water port is directly connected to the cooling pipe in an up-and-down direction.

4. The battery pack according to claim 3, wherein: The battery pack cover comprises: an uneven portion that is fitted into an edge of the battery pack tray; and A cooling pipe installation portion is formed to extend into the battery pack cover so that the cooling pipe is inserted into the cooling pipe installation portion.

5. The battery pack according to claim 1, wherein: Each of the battery modules includes an electrode terminal that protrudes horizontally on one side surface of the module case, The battery pack cover includes at least one terminal connection unit located at an inner surface of a top end of the battery pack cover, and The electrode terminal of one battery module and the electrode terminal of another battery module are electrically connected through the terminal connection unit.

6. The battery pack according to claim 5, wherein: The terminal connection unit comprises: an insulating bracket fixedly coupled to an inner surface of the battery pack cover; and An intermediate bus bar is mounted to the bracket and is electrically connected to the electrode terminals.

7. The battery pack according to claim 5, wherein: The electrode terminal and the terminal connection unit are integrally connected by a second fastening member which is vertically inserted into the electrode terminal and the terminal connection unit.

8. The battery pack according to claim 7, wherein: The module housing further includes a terminal support configured to support a lower portion of the electrode terminal, and When the terminal support, the electrode terminal, and the terminal connection unit are integrally connected by the second fastening member, each battery module is fixed to the pack cover.

9. The battery pack according to claim 1, wherein: The plurality of battery modules are arranged in two rows such that electrode terminals of the plurality of battery modules are disposed to face each other based on a center portion of the battery pack case.

10. A vehicle comprising the battery pack according to any one of claims 1 to 9.

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