Battery cell assembly and battery pack comprising same

Abstract

The present technology provides a battery cell assembly including: a battery cell block including a plurality of battery cells; a bus bar connected to an electrode lead of the battery cell block; a bus bar frame on which the bus bar is mounted, the bus bar frame including an accommodating space accommodating a portion of the bus bar; and a thermally conductive filler at least partially filling the accommodation space of the bus bar frame, the thermally conductive filler being in contact with the bus bar.

Description

Technical Field

[0001] The present disclosure relates to a battery cell assembly and a battery pack including the battery cell assembly.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0095852, filed on July 24, 2023, the entire contents of which are incorporated herein by reference. Background Art

[0003] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries have been widely used as an energy source for various types of wireless devices such as mobile phones, laptop computers, and cordless vacuum cleaners. Secondary batteries are being studied for application in the mobility field such as battery electric vehicles (BEVs), to reduce damage to secondary batteries due to generated heat, thereby improving the reliability of secondary batteries, and to increase the battery capacity and energy density of secondary batteries. Summary of the Invention

[0004] Technical Problem

[0005] The present disclosure relates to a battery cell assembly and a battery pack including the battery cell assembly.

[0006] Technical Solution

[0007] One aspect of the present disclosure provides a battery cell assembly, including: a battery cell block including a plurality of battery cells; a bus bar connected to electrode leads of the battery cell block; a bus bar frame on which the bus bar is mounted, the bus bar frame including an accommodation space for accommodating a part of the bus bar; and a thermal conductive filler at least partially filling the accommodation space of the bus bar frame and in contact with the bus bar.

[0008] In an exemplary embodiment, the battery cell assembly may further include a cooling plate disposed on the battery cell block, the cooling plate being in contact with the thermal conductive filler.

[0009] In an exemplary embodiment, the bus bar frame may include a slit on a lower side of the accommodation space and an opening on an upper side of the accommodation space, the bus bar may be inserted into the accommodation space of the bus bar frame through the slit of the bus bar frame, and a first part of the cooling plate may be inserted into the accommodation space of the bus bar frame through the opening of the bus bar frame.

[0010] In an exemplary embodiment, at least a part of the first part of the cooling plate may be buried in the thermal conductive filler.

[0011] In an exemplary embodiment, the cooling plate may be coupled to the upper surface of the battery cell block, and the bus bar frame may be coupled to one side of the battery cell block.

[0012] In an exemplary embodiment, the battery cell assembly may further include another bus bar connected to different electrode leads of the battery cell block, and a thermally conductive filler may be in contact with the other bus bar.

[0013] In an exemplary embodiment, the thermally conductive filler may include: a first material layer including silicone resin; and a second material layer laminated on the first material layer and including thermally conductive resin.

[0014] In an exemplary embodiment, the bus bar may be an internal bus bar configured to connect different electrode leads of the battery cell block or a terminal bus bar electrically connected to an external electronic device.

[0015] One aspect of the present disclosure provides a battery pack including: a battery pack housing; and a plurality of battery cell assemblies mounted in the battery pack housing and arranged in a first direction, wherein each of the plurality of battery cell assemblies includes: a battery cell block including a plurality of battery cells; a cooling plate located on the battery cell block; a plurality of bus bars connected to different electrode leads of the battery cell block; a bus bar frame including a lower portion on which the plurality of bus bars are mounted and an upper portion having a receiving space for receiving a part of each of the plurality of bus bars and a first part of the cooling plate; and a thermally conductive filler at least partially filling the receiving space of the bus bar frame, the thermally conductive filler being in contact with the plurality of bus bars and the cooling plate to thermally couple the plurality of bus bars to the cooling plate.

[0016] In an exemplary embodiment, the bus bar frame may include a plurality of slits on the lower side of the receiving space and an opening on the upper side of the receiving space, each of the plurality of bus bars may be inserted into the receiving space of the bus bar frame through a corresponding slit of the plurality of slits, and the first part of the cooling plate may be inserted into the receiving space of the bus bar frame through the opening of the bus bar frame.

[0017] In an exemplary embodiment, the plurality of bus bars may be arranged in the first direction, and the first part of the cooling plate may continuously extend in the first direction and be in continuous contact with the thermally conductive filler.

[0018] In an exemplary embodiment, the cooling plate may be coupled to the upper surface of the battery cell block, and the bus bar frame may be coupled to one side of the battery cell block.

[0019] In an exemplary embodiment, the battery pack may further include: a lower case configured to accommodate a plurality of battery cell assemblies; and a top plate coupled to the lower case and covering the plurality of battery cell assemblies, wherein the plurality of battery cell assemblies may be supported by the top plate and suspended therefrom.

[0020] In an exemplary embodiment, the plurality of battery cell assemblies may be spaced apart from the bottom wall of the lower case, and a space may be formed between each of the plurality of battery cell assemblies and the bottom wall of the lower case.

[0021] In an exemplary embodiment, each of the plurality of battery cell assemblies may include a battery cell block in which pouch-type battery cells are stacked.

[0022] Advantageous Effects

[0023] According to an exemplary embodiment of the present disclosure, the bus bar is thermally coupled to the cooling plate through a thermally conductive filler, thereby improving the cooling efficiency of the bus bar. Accordingly, thermal damage to the bus bar can be prevented, and the reliability of the battery cell assembly can be improved.

[0024] The effects that can be achieved by the exemplary embodiments of the present disclosure are not limited to the above effects, and other effects not described herein will be clearly obtained and understood by those of ordinary skill in the art to which the exemplary embodiments of the present disclosure pertain from the following description. That is, those of ordinary skill in the art can deduce unanticipated effects achieved when implementing the exemplary embodiments of the present disclosure based on the exemplary embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective view of a battery cell assembly according to an exemplary embodiment of the present disclosure.

[0026] Figure 2 is a side view of some components of a battery cell assembly according to an exemplary embodiment of the present disclosure.

[0027] Figure 3 is a cross-sectional view of some components of a battery cell assembly according to an exemplary embodiment of the present disclosure.

[0028] Figure 4 is a plan view of some components of a battery cell assembly according to an exemplary embodiment of the present disclosure.

[0029] Figure 5 is a cross-sectional view of a part of a battery cell assembly according to an exemplary embodiment of the present disclosure.

[0030] Figure 6 is a cross-sectional view of a battery pack according to an embodiment of the present disclosure.

[0031] Figure 7Schematic diagram of an electric vehicle equipped with a battery pack according to an exemplary embodiment of the present disclosure. Detailed description of specific embodiments

[0032] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before describing the embodiments of the present disclosure, the terms or expressions used in this specification and claims should not be construed as being limited to the terms or expressions commonly understood or defined in a general dictionary, but should be understood based on the principle that the inventors of this application can appropriately define the terms or expressions to best explain the present disclosure, according to the meanings and concepts corresponding to the present disclosure.

[0033] Therefore, the embodiments described herein and the configurations shown in the accompanying drawings are only examples of the present disclosure and do not reflect all the technical concepts of the present disclosure. Therefore, it should be understood that various equivalents and modifications to this configuration have been made as of the filing date of this application.

[0034] When it is determined that well-known configurations or functions related to the description of the present disclosure obscure the subject matter of the present disclosure due to unnecessary details, these configurations or functions will not be described in detail.

[0035] Since the embodiments of the present disclosure are provided to more comprehensively illustrate the present disclosure to those of ordinary skill in the art, for clarity, the shapes, sizes, etc. of the components shown in the accompanying drawings may be enlarged, omitted, or schematically shown. Therefore, it should not be understood that the dimensions or ratios of the components completely reflect their actual dimensions or ratios.

[0036] (First Embodiment)

[0037] Figures 1 to 4 It is a diagram showing a battery cell assembly 100 according to an exemplary embodiment of the present disclosure. Figure 1 It is a perspective view of the battery cell assembly 100. Figure 2 It is a side view of some components of the battery cell assembly 100. Figure 3 It is a sectional view of some components of the battery cell assembly 100. Figure 4 It is a plan view of some components of the battery cell assembly 100.

[0038] Referring to Figures 1 to 4 , the battery cell assembly 100 may include a battery cell block 110, a housing 120 having a cooling plate 121, a bus bar 130, a bus bar frame 140, and a thermal conductive filler 150.

[0039] The battery cell block 110 may include a plurality of battery cells 111. Each battery cell 111 is a basic unit of a lithium-ion battery (i.e., a secondary battery). Each battery cell 111 may include an electrode assembly, an electrolyte, and a housing. The electrode assembly included in the housing may include a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. Depending on the assembled form, the electrode assembly may be a wound electrode assembly or a stacked electrode assembly. The wound electrode assembly may include a structure in which the positive electrode, the negative electrode, and the separator interposed between them are wound together. The stacked electrode assembly may include a plurality of positive electrodes and a plurality of negative electrodes stacked in sequence and a plurality of separators interposed between them. The positive electrode may include a positive electrode current collector and a positive electrode active material. The negative electrode may include a negative electrode current collector and a negative electrode active material.

[0040] The plurality of battery cells 111 may be connected in series and / or in parallel. For example, the plurality of battery cells 111 may be connected in series with each other. For example, the plurality of battery cells 111 may be connected in parallel with each other. For example, when a set of two or more battery cells 111 connected in parallel is defined as a group, a group including two or more battery cells 111 connected in parallel and another group including two or more battery cells 111 connected in parallel may be connected in series.

[0041] Each battery cell 111 may be a pouch-type battery cell, a cylindrical battery cell, or a prismatic battery cell. The electrode assembly of the pouch-type battery cell is embedded in a pouch housing including an aluminum laminate sheet. The electrode assembly of the cylindrical battery cell is embedded in a cylindrical metal can. The electrode assembly of the prismatic battery cell is embedded in a prismatic metal can. In an exemplary embodiment, the battery cell assembly 100 may be a battery module having a module housing surrounding the upper surface, lower surface, left surface, and right surface of the battery cell block 110 or a device having a partially or completely removed module housing.

[0042] In an exemplary embodiment, the battery cells 111 may be pouch-type battery cells and stacked together in a first direction (X-axis direction) in one battery cell assembly 100. In an exemplary embodiment, in each battery cell assembly 100, the plurality of battery cells 111 may be pouch-type battery cells whose length in the first direction (X-axis direction) is less than its length in the second direction (Y-axis direction) and stacked in the first direction (X-axis direction).

[0043] In an exemplary embodiment, each battery cell assembly 100 may include a single battery cell block 11O. However, the present disclosure is not limited thereto, and each battery cell assembly 100 may include a plurality of sub - battery cell blocks arranged in the second direction (Y - axis direction), and each sub - battery cell block may include a plurality of battery cells 111 stacked in the first direction (X - axis direction). For example, each battery cell assembly 100 may include two sub - battery cell blocks 110 arranged in the second direction (Y - axis direction).

[0044] When viewed in a plan view, the battery cell block 110 may have a rectangular shape. In this case, the battery cell block 110 may have a first side and a second side facing each other in the first direction (X - axis direction), a front surface and a rear surface facing each other in the second direction (Y - axis direction), and an upper surface and a lower surface facing each other in the third direction (Z - axis direction).

[0045] Each bus bar frame 140 may be disposed on one of the front surface and the rear surface of the battery cell block 110. A plurality of bus bars 130 may be mounted on the bus bar frame 140 on the front surface of the battery cell block 110, and a plurality of bus bars 130 may be mounted on the bus bar frame 140 on the rear surface of the battery cell block 110. The bus bar frame 140 may support the electrode leads 119 of the battery cell block 110. The electrode leads 119 may include a positive electrode lead and a negative electrode lead for each of the plurality of battery cells 111 (see Figure 6 ). The battery cell assembly 100 may include end plates 171 to cover the bus bar frame 140 on the front surface of the battery cell block 110 and the bus bar frame 140 on the rear surface of the battery cell block 110.

[0046] The bus bar frame 140 may include an insulating material. The bus bar frame 140 may include a foamable refractory coating. Here, the foamable refractory coating may include a dry coating that foams when exposed to heat. When the dry coating foams, the volume of the insulating layer (e.g., a carbonized layer) is dozens of times the volume of the dry coating. The insulating layer may delay the transfer of heat to the object to be protected (e.g., the plurality of battery cells 111) for a period of time.

[0047] The bus bar 130 may be coupled to the electrode lead 119 of the battery cell 111. For example, the bus bar 130 may be coupled to the electrode lead 119 of the battery cell 111 by welding. For example, each bus bar 130 may be an internal bus bar that is coupled to the electrode leads 119 of different battery cells 111 belonging to the battery cell block 110 to electrically connect the different battery cells 111. For example, each bus bar 130 may be a terminal bus bar that electrically connects the battery cell assembly 100 to an external electronic device.

[0048] The housing 120 can accommodate the battery cell block 110. For example, the housing 120 can surround the first side surface, the second side surface, and the upper surface of the battery cell block 110. For example, the housing 120 can include a side wall covering the first side surface and the second side surface of the battery cell block 110 and an upper wall covering the upper surface of the battery cell block 110. The housing 120 can be coupled to the bus bar frame 140 on the front surface and the rear surface of the battery cell block 110.

[0049] The housing 120 can include a cooling plate 121 forming the upper wall of the battery cell block 110. The cooling plate 121 can be attached to the upper surface of the battery cell block 110 and thermally coupled to the battery cell block 110. For example, the cooling plate 121 can be attached to the upper surface of the battery cell block 110 through a thermal interface material (TIM) layer. The cooling plate 121 can include cooling channels 1211 configured to allow a cooling fluid to flow therethrough. The cooling fluid provided from the outside of the battery cell assembly 100 can flow into the cooling channels 1211 through the inlets of the cooling channels 1211, flow along the cooling channels 1211, and then flow out through the outlets of the cooling channels 1211. When the first cooling fluid flows along the cooling channels 1211, the battery cell assembly 100 can be cooled. For example, the cooling plate 121 can be manufactured by joining two plates, and the cooling channels 1211 can include a space defined between the two plates.

[0050] Meanwhile, the bus bar frame 140 can include a lower portion 141 on which the bus bars 130 are mounted and an upper portion 145 having accommodation spaces 1451 for accommodating portions of the respective bus bars 130. In the bus bar frame 140, the upper portion 145 of the bus bar frame 140 can be closer to the cooling plate 121 than the lower portion 141. The upper portion 145 of the bus bar frame 140 can be integrally formed with the lower portion 141 of the bus bar frame 140.

[0051] A slit 1453 may be provided on the lower side of the accommodation space 1451 of the bus bar frame 140, and an opening 1452 may be provided on the upper side of the accommodation space 1451 of the bus bar frame 140. The accommodation space 1451 of the bus bar frame 140 may communicate with the slit 1453 and the opening 1452. Each slit 1453 of the bus bar frame 140 may provide a path through which a bus bar 130 passes. When observed in a plan view, the size of one slit 1453 may be substantially the same as the size of one bus bar 130. Each bus bar 130 is inserted into its corresponding slit 1453, and the upper portion of each bus bar 130 may be accommodated in the accommodation space 1451 of the bus bar frame 140. The first portion 1213 of the cooling plate 121 may extend through the opening 1452 of the bus bar frame 140 into the interior of the accommodation space 1451 of the bus bar frame 140. When observed in a plan view, the bus bars 130 may be arranged in a first direction (X-axis direction), and the first portion 1213 of the cooling plate 121 may linearly and continuously extend in the first direction (X-axis direction). A part of the first portion 1213 of the cooling plate 121 may be embedded in the heat-conductive filler 150. The first portion 1213 of the cooling plate 121 may be in continuous contact with the heat-conductive filler 150 in the first direction (X-axis direction).

[0052] When observed in a cross-sectional view, the first portion 1213 of the cooling plate 121 may obliquely extend from a part of the upper surface of the cooling plate 121 facing the battery cell block 110. For example, when observed in a cross-sectional view, the first portion 1213 of the cooling plate 121 may include a part that bends downward from a part of the upper surface of the cooling plate 121 facing the battery cell block 110 or a part of the cooling plate 121 that contacts the uppermost end portion of the bus bar frame 140.

[0053] The heat-conductive filler 150 may be provided in the accommodation space 1451 of the bus bar frame 140. The accommodation space 1451 of the bus bar frame 140 may be at least partially filled with the heat-conductive filler 150. The heat-conductive filler 150 may be heat-conductive, but may be non-conductive. For example, the heat-conductive filler 150 may contain a heat-conductive resin. The heat-conductive filler 150 may include a single material layer or a multi-material layer. The heat-conductive filler 150 may be referred to as a heat-conductive material layer.

[0054] The thermal conductive filler 150 can be configured to thermally couple the bus bar 130 to the cooling plate 121. The thermal conductive filler 150 can contact the bus bar 130 inserted into the accommodation space 1451 of the bus bar frame 140 through the slit 1453 of the bus bar frame 140, and can also contact the first portion 1213 of the cooling plate 121 inserted into the accommodation space 1451 of the bus bar frame 140 through the opening 1452 of the bus bar frame 140. The thermal conductive filler 150 can provide a thermal conduction path for thermally connecting each bus bar 130 to the cooling plate 121.

[0055] According to an exemplary embodiment of the present disclosure, the bus bar 130 is thermally coupled to the cooling plate 121 through the thermal conductive filler 150, which can improve the cooling efficiency of the bus bar 130. Therefore, thermal damage to the bus bar 130 can be prevented, and the reliability of the battery cell assembly 100 can be improved.

[0056] (Second Embodiment)

[0057] Figure 5 is a cross-sectional view of a part of the battery cell assembly 100A according to an exemplary embodiment of the present disclosure. Hereinafter, the description will focus on the differences from the above-described battery cell assembly 100 with reference to Figures 1 to 4 to describe Figure 5 the battery cell assembly 100A.

[0058] With reference to Figure 5 , the thermal conductive filler 150A can include a first material layer 151 and a second material layer 152 laminated on the first material layer 151. The first material layer 151 and the second material layer 152 can contain different materials. In an exemplary embodiment, the first material layer 151 can contain silicone resin and serve as a sealing layer for sealing the bottom of the accommodation space 1451 of the bus bar frame 140. In an exemplary embodiment, the second material layer 152 can contain a thermally conductive resin and provide a thermal conduction path for thermally coupling each bus bar 130 to the cooling plate 121.

[0059] (Third Embodiment)

[0060] Figure 6 is a cross-sectional view of a battery pack 500 according to an exemplary embodiment of the present disclosure. Hereinafter, the description of parts that are the same as those above will be omitted or simplified.

[0061] With reference to Figure 6 , the battery pack 500 can include a battery pack housing 510 and a plurality of battery cell assemblies 100 mounted in the battery pack housing 510.

[0062] The plurality of battery cell assemblies 100 can be mounted in the battery pack housing 510 and arranged in the first direction (X-axis direction). Figure 6It is shown that the battery pack 500 includes two battery cell assemblies 100 arranged in the first direction (X-axis direction), but the embodiment is not limited thereto. For example, the battery pack 500 may include three or more battery cell assemblies 100 arranged in the first direction (X-axis direction).

[0063] The battery pack housing 510 may include a lower housing 511 having a receiving space for receiving a plurality of battery cell assemblies 100 and a top plate 515 coupled to the lower housing 511 and covering the lower housing 511 that houses the plurality of battery cell assemblies 100. The receiving space of the lower housing 511 may be defined by a bottom wall facing the bottom surface of the battery cell block 110 of each battery cell assembly 100 and side walls at the edges of the bottom wall. The top plate 515 is a battery pack cover configured to cover the plurality of battery cell assemblies 100. When the battery pack 500 is installed in a vehicle, the cabin room where passengers sit may be located above the top plate 515, and the ground on which the vehicle travels may be located below the lower housing 511.

[0064] In an exemplary embodiment, each of the plurality of battery cell assemblies 100 may be coupled to and supported by a corresponding support block 5111 of the lower housing 511. The fastening portion 127 of the housing 120 may be provided on one side of each battery cell assembly 100 and is fastened to a corresponding support block 5111 of the lower housing 511 by a fastening member such as a bolt BT and is supported by the corresponding support block 5111 of the lower housing 511.

[0065] In an exemplary embodiment, each of the plurality of battery cell assemblies 100 may be supported by the top plate 515 and suspended from the top plate 515. Each battery cell assembly 100 may be coupled to the lower surface of the top plate 515.

[0066] In addition, a free volume FV may exist between the lower surface of each battery cell assembly 100 and the bottom wall of the lower housing 511. The free volume FV may be understood as a space formed by the bottom wall of the lower housing 511 and each battery cell assembly 100 being spaced apart from each other.

[0067] The present disclosure provides an inverted support structure in which each battery cell assembly 100 is supported by the top plate 515 and suspended from the top plate 515. In addition, a free volume EV is provided between the bottom of the battery pack 500 (i.e., the bottom wall of the lower housing 511) and each battery cell assembly 100. The gas and flame generated in the case of thermal runaway may move through the free volume FV. That is, the free volume FV serves as an exhaust passage through which the high-temperature gas and flame can pass.

[0068] Even when a strong impact is generated due to foreign objects splashing onto the lower part of the vehicle while driving on a hard surface such as an unpaved road, the impact can be absorbed by the free volume FV. Therefore, it is possible to prevent multiple battery cell assemblies 100 from being damaged due to the impact. The free volume FV is a hollow space between each of the multiple battery cell assemblies 100 and the lower housing 511, and can be used as a space that enables the lower housing 511 to deform freely to a certain extent when the lower housing 511 deforms toward each battery cell assembly 100 due to the impact applied to the lower part of the vehicle. No structure can be installed in the free volume FV. Alternatively, a structure for supporting the battery cell assembly 100 or the like can be partially installed in the free volume FV. When a structure is installed in the free volume FV, a space sufficient to enable the lower housing 511 to deform should be provided between each battery cell assembly 100 and the lower housing 511.

[0069] The height of the free volume FV and the distance between the bottom wall of the lower housing 511 and each battery cell assembly 100 can be determined to be sufficient to absorb an external impact. The height of the free volume FV can be determined in consideration of the size and stiffness of the vehicle's frame, the size and stiffness of the lower housing 511, the size of the battery pack 500, the amount of gas generated during thermal runaway, and the exhaust rate. For example, when the thickness or stiffness of the vehicle's frame or the bottom wall of the lower housing 511 is relatively large, at least one of the size and height of the free volume FV can be relatively reduced. When the thickness or stiffness of the vehicle's frame or the bottom wall of the lower housing 511 is relatively small, the bottom wall of the lower housing 511 is likely to deform, so at least one of the size and height of the free volume FV can be relatively increased to protect the battery cell assembly 100. When the size of the battery pack 500 is relatively large compared to the standard of the battery pack 500, a relatively large free volume FV can be ensured. When the size of the battery pack 500 is relatively small, the height of the free volume FV to be ensured may be relatively small, so the thickness and stiffness of the bottom wall of the lower housing 511 must be relatively increased. When the height of the free volume FV is very small, the exhaust passage may be small, so the internal pressure of the battery pack 500 may increase sharply during thermal runaway. Therefore, the size and height of the free volume FV can be determined in consideration of the amount of gas generated and the exhaust rate.

[0070] The maximum height of the free volume FV can be determined based on the degree of damage to the battery cells 111 included in the battery cell assembly 100. For example, when the damage tolerance of the battery cell 111 is 1 mm, the free volume FV can be determined to prevent the battery cell 111 from deforming by more than 1 mm when the lower housing 511 deforms and presses on the lower surface of the battery cell 111. In this case, the amount of deformation of the lower housing 511 can vary depending on the thickness or stiffness of the lower housing 511. Therefore, the size or height of the free volume FV can be determined taking into account all the damage tolerances of the battery cell 111 as well as the thickness and stiffness of the lower housing 511.

[0071] The upper surface of each battery cell assembly 100 can be tightly bonded to the lower surface of the top plate 515. When there is a space between the battery cell assembly 100 and the top plate 515, during thermal runaway, high-temperature gases may flow into the space between the battery cell assembly 100 and the top plate 515, and thus heat and flames may spread to adjacent battery cell assemblies 100. Heat and flames may also be transferred to the top plate 515, and thus may affect the compartment above the top plate 515. Therefore, by tightly bonding the upper surface of each battery cell assembly 100 and the lower surface of the top plate 515, the gases or flames generated in the battery pack 500 can be guided into the free volume FV.

[0072] (Fourth Embodiment)

[0073] Figure 7 is a schematic view of an electric vehicle 1000 equipped with a battery pack 1100 according to an exemplary embodiment of the present disclosure.

[0074] For simplicity, Figure 7 only the vehicle body frame 1200 forming the lower frame of the electric vehicle 1000, the battery pack 1100 combined with the vehicle body frame 1200, and the tires are shown. For example, the battery pack 1100 may include the battery pack 500 described above with reference to Figure 6 description of the battery pack 500.

[0075] In the case of a conventional battery pack, the battery cell assembly is mounted at the bottom of the battery pack housing. However, in the present embodiment, the battery cell assembly 100 of the battery pack 1100 is configured to be supported by the top plate 1120 of the housing and suspended from the top plate 1120 of the housing. That is, since there is no space between the battery cell assembly 100 and the top plate 1120, gas generated from the battery cell assembly 100 can be prevented from being transmitted to the compartment corresponding to the upper portion of the electric vehicle 1000. The gas can be guided to flow into the free volume FV between the battery cell assembly 100 and the lower side of the housing of the battery pack 1100. The gas can flow through the free volume FV and be discharged to the lower side of the electric vehicle 1000 through the exhaust port provided in the battery pack 1100. Additionally, according to the present embodiment, in the battery pack 1100, the free volume FV is provided between the battery cell assembly 100 and the housing, so that damage to the battery cell assembly 100 can be prevented regardless of how the housing is deformed.

[0076] According to an embodiment of the present disclosure, the battery pack 1100 and the electric vehicle 1000 including the battery pack 1100 can improve the safety of passengers. Additionally, the battery cell assembly 100, which is a key component, can be protected, and the durability of the battery pack 1100 and the electric vehicle 1000 can be enhanced.

[0077] The present disclosure has been described in detail above with reference to the drawings, embodiments, etc. However, the configurations shown in the drawings or embodiments described in this specification are only embodiments of the present disclosure and do not reflect all the technical concepts of the present disclosure. Therefore, it should be understood that various equivalents and modifications that replace this configuration have been made as of the filing date of the present disclosure.

Claims

1. A battery cell assembly, comprising: A battery cell block, wherein the battery cell block includes a plurality of battery cells; A bus bar connected to the electrode leads of the battery cell block; a busbar frame on which the busbar is mounted, the busbar frame comprising a receiving space for receiving a portion of the busbar; as well as A thermally conductive filler at least partially fills the accommodation space of the busbar frame, and the thermally conductive filler contacts the busbar.

2. The battery cell assembly according to claim 1, further comprising: A cooling plate is located on the battery cell block, and the cooling plate is in contact with the thermal conductive filler.

3. The battery cell assembly according to claim 2, wherein: The busbar frame includes a slit at a lower side of the accommodation space and an opening at an upper side of the accommodation space, The bus bar is inserted into the accommodation space of the bus bar frame through the slit of the bus bar frame, and The first portion of the cooling plate is inserted into the receiving space of the bus bar frame through the opening of the bus bar frame.

4. The battery cell assembly according to claim 3, wherein: At least a portion of the first portion of the cooling plate is embedded in the thermally conductive filler.

5. The battery cell assembly according to claim 2, wherein: The cooling plate is combined with the upper surface of the battery cell block, and The bus bar frame is coupled to one side of the battery cell block.

6. The battery cell assembly according to claim 1, further comprising: another bus bar connected to different electrode leads of the battery cell block, Wherein, the thermally conductive filler is in contact with the other bus bar.

7. The battery cell assembly according to claim 1, wherein: The thermally conductive filler comprises: A first material layer, the first material layer comprising silicone resin; and The second material layer is stacked on the first material layer and contains a thermally conductive resin.

8. The battery cell assembly according to claim 1, wherein: The bus bar includes an internal bus bar configured to connect different electrode leads of the battery cell block or a terminal bus bar electrically connected to an external electronic device.

9. A battery pack comprising: Battery pack housing; as well as a plurality of battery cell assemblies, the plurality of battery cell assemblies being mounted in the battery pack housing and arranged in a first direction, Wherein, each of the plurality of battery cell assemblies comprises: A battery cell block, wherein the battery cell block includes a plurality of battery cells; A cooling plate, the cooling plate being located on the battery cell block; A plurality of bus bars connected to different electrode leads of the battery cell block; a bus bar frame including a lower portion configured to have the plurality of bus bars mounted thereon and an upper portion having an accommodation space accommodating a portion of each of the plurality of bus bars and a first portion of the cooling plate; and A thermally conductive filler at least partially fills the accommodation space of the busbar frame, the thermally conductive filler contacts the plurality of busbars and the cooling plate to thermally couple the plurality of busbars with the cooling plate.

10. The battery pack according to claim 9, wherein: The busbar frame includes a plurality of slits at a lower side of the accommodation space and an opening at an upper side of the accommodation space, Each of the plurality of bus bars is inserted into the receiving space of the bus bar frame through a corresponding slit among the plurality of slits, and The first portion of the cooling plate is inserted into the receiving space of the bus bar frame through the opening of the bus bar frame.

11. The battery pack according to claim 9, wherein: The plurality of bus bars are arranged in a first direction, and The first portion of the cooling plate extends continuously in the first direction and is in continuous contact with the thermally conductive filler.

12. The battery pack according to claim 9, wherein: The cooling plate is combined with the upper surface of the battery cell block, and The bus bar frame is coupled to one side of the battery cell block.

13. The battery pack according to claim 9, further comprising: a lower housing configured to accommodate the plurality of battery cell assemblies; as well as a top plate, the top plate being combined with the lower housing and covering the plurality of battery cell assemblies, The plurality of battery cell assemblies are supported by the top plate and suspended from the top plate.

14. The battery pack according to claim 13, wherein: The plurality of battery cell assemblies are spaced apart from a bottom wall of the lower case, and a space is formed between each of the plurality of battery cell assemblies and the bottom wall of the lower case.

15. The battery pack according to claim 9, wherein: Each of the plurality of battery cell assemblies includes a battery cell block in which pouch-type battery cells are stacked.

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