Battery cell assembly and battery pack including same

Abstract

The technical idea of the present invention provides a battery cell assembly comprising: a cell block including a plurality of battery cells; a bus bar connected to an electrode lead of the cell block; a bus bar frame on which the bus bar is mounted and which has an accommodation space for accommodating a portion of the bus bar; and a thermally conductive filler which at least partially fills the accommodation space of the bus bar frame and is in contact with the bus bar.

Description

Battery cell assembly and battery pack including the same

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

[0002] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2023-0095852, filed July 24, 2023, the entire contents of which are incorporated herein by reference.

[0003] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as a power source for various wireless devices, including handsets, laptops, and cordless vacuum cleaners. As secondary batteries are increasingly applied to mobility applications like battery electric vehicles (BEVs), research is underway to increase their capacity and energy density, as well as to reduce damage caused by overheating and thereby enhance their reliability.

[0004] The technical problem to be solved by the present invention relates to a battery cell assembly and a battery pack including the battery cell assembly.

[0005] In order to solve the above-described problem, the technical idea of ​​the present invention provides a battery cell assembly including: a cell block including a plurality of battery cells; a bus bar connected to electrode leads of the cell block; a bus bar frame on which the bus bar is mounted and having a receiving space for receiving a portion of the bus bar; and a thermally conductive filler that at least partially fills the receiving space of the bus bar frame and is in contact with the bus bar.

[0006] In exemplary embodiments, the cell block further comprises a cooling plate disposed on the cell block and in contact with the thermally conductive filler.

[0007] In exemplary embodiments, the busbar frame includes a slit at a lower side of the receiving space and an opening at an upper side of the receiving space, the busbar is inserted into the receiving space of the busbar frame through the slit of the busbar frame, and the first part of the cooling plate is inserted into the receiving space of the busbar frame through the opening of the busbar frame.

[0008] In exemplary embodiments, at least a portion of the first portion of the cooling plate is characterized in that it is embedded in the thermally conductive filler.

[0009] In exemplary embodiments, the cooling plate is coupled to an upper surface of the cell block, and the busbar frame is coupled to one side of the cell block.

[0010] In exemplary embodiments, the cell block further comprises another busbar connected to another electrode lead, wherein the thermally conductive filler is characterized in that it is in contact with the other busbar.

[0011] In exemplary embodiments, the thermally conductive filler is characterized by including: a first material layer comprising silicon; and a second material layer laminated on the first material layer and comprising a thermally conductive resin.

[0012] In exemplary embodiments, the busbar is characterized as being an inter-busbar connecting different electrode leads of the cell block or a terminal busbar electrically connected to an external electrical device.

[0013] In order to solve the above-described problem, the technical idea of ​​the present invention provides a battery pack including: a pack housing; and a plurality of battery cell assemblies mounted on the pack housing and arranged in a first direction; wherein each of the plurality of battery cell assemblies includes: a cell block including a plurality of battery cells; a cooling plate on the cell block; a plurality of bus bars connected to different electrode leads of the 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 portion of each of the plurality of bus bars and a first portion of the cooling plate; and a thermally conductive filler that at least partially fills the receiving space of the bus bar frame and is configured to contact the plurality of bus bars and the cooling plate to thermally couple the plurality of bus bars to the cooling plate.

[0014] In exemplary embodiments, the busbar frame includes a plurality of slits on a lower side of the receiving space and an opening on an upper side of the receiving space, the plurality of busbars are each inserted into the receiving space of the busbar 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 busbar frame through the opening of the busbar frame.

[0015] In exemplary embodiments, the plurality of bus bars are arranged in a first direction, and the first portion of the cooling plate is characterized in that it extends continuously in the first direction and is in continuous contact with the thermally conductive filler.

[0016] In exemplary embodiments, the cooling plate is coupled to an upper surface of the cell block, and the busbar frame is coupled to one side of the cell block.

[0017] In exemplary embodiments, the battery cell assembly comprises a lower housing accommodating the plurality of battery cell assemblies; and a top plate coupled to the lower housing to cover the plurality of battery cell assemblies, wherein the plurality of battery cell assemblies are supported by being suspended from the top plate.

[0018] In exemplary embodiments, the plurality of battery cell assemblies are spaced apart from the bottom wall of the lower housing, and a space is formed between each of the plurality of battery cell assemblies and the bottom wall of the lower housing.

[0019] In exemplary embodiments, the plurality of battery cell assemblies are each characterized by including a cell block in which pouch-type battery cells are stacked.

[0020] According to exemplary embodiments of the present invention, the busbars are thermally coupled to the cooling plate via a thermally conductive filler, thereby improving cooling efficiency for the busbars. This prevents thermal damage to the busbars and enhances the reliability of the battery cell assembly.

[0021] The effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0022] FIG. 1 is a perspective view illustrating a battery cell assembly according to exemplary embodiments of the present invention.

[0023] FIG. 2 is a side view showing a portion of a configuration of a battery cell assembly according to exemplary embodiments of the present invention.

[0024] FIG. 3 is a cross-sectional view showing a portion of a battery cell assembly according to exemplary embodiments of the present invention.

[0025] FIG. 4 is a plan view showing a portion of a battery cell assembly according to exemplary embodiments of the present invention.

[0026] FIG. 5 is a cross-sectional view showing a portion of a battery cell assembly according to exemplary embodiments of the present invention.

[0027] FIG. 6 is a cross-sectional view showing a battery pack according to exemplary embodiments of the present invention.

[0028] FIG. 7 is a schematic diagram showing an electric vehicle equipped with a battery pack according to exemplary embodiments of the present invention.

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0030] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0031] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0032] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer explanation. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes or proportions.

[0033]

[0034] (Example 1)

[0035] FIGS. 1 to 4 are drawings showing a battery cell assembly (100) according to exemplary embodiments of the present invention, wherein FIG. 1 is a perspective view showing a battery cell assembly (100), FIG. 2 is a side view showing a part of the battery cell assembly (100), FIG. 3 is a cross-sectional view showing a part of the battery cell assembly (100), and FIG. 4 is a plan view showing a part of the battery cell assembly (100).

[0036] Referring to FIGS. 1 to 4, a battery cell assembly (100) may include a cell block (110), a case (120) having a cooling plate (121), a bus bar (130), a bus bar frame (140), and a thermally conductive filler (150).

[0037] A 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 case. The electrode assembly built into the case may include a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The electrode assembly may be either a jelly-roll type or a stack type depending on the assembly form. A jelly-roll type electrode assembly may include a winding structure of a positive electrode, a negative electrode, and a separator interposed therebetween. A stack type electrode assembly may include a plurality of sequentially stacked positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed therebetween. 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.

[0038] A plurality of battery cells (111) may be connected in series and / or in parallel. For example, a plurality of battery cells (111) may be connected in series with each other. For example, a plurality of battery cells (111) may also be connected in parallel with each other. For example, when a set of two or more battery cells (111) connected in parallel with each other is defined as a bank, one bank composed of two or more battery cells (111) connected in parallel with each other and another bank composed of two or more battery cells (111) connected in parallel with each other may be connected in series.

[0039] Each battery cell (111) may correspond to a pouch-type battery cell, a cylindrical battery cell, or a square battery cell. The electrode assembly of the pouch-type battery cell is housed in a pouch case including an aluminum laminate sheet. The electrode assembly of the cylindrical battery cell is housed in a cylindrical metal can. The electrode assembly of the square battery cell is housed in a square metal can. In exemplary embodiments, the battery cell assembly (100) may be a battery module having a module case surrounding the upper, lower, left, and right sides of the cell block (110), or may be a device having a form in which part or all of the module case is removed.

[0040] In exemplary embodiments, each battery cell (111) corresponds to a pouch-type battery cell, and a plurality of battery cells (111) within one battery cell assembly (100) may be stacked one upon another in a first direction (X direction). In exemplary embodiments, in each battery cell assembly (100), the plurality of battery cells (111) correspond to pouch-type battery cells, each having a length along the first direction (X direction) that is smaller than a length along the second direction (Y direction), and the plurality of battery cells (111) may be stacked in the first direction (X direction).

[0041] In exemplary embodiments, an individual battery cell assembly (100) may include a single cell block (110). However, the present invention is not limited thereto, and an individual battery cell assembly (100) may include a plurality of sub-cell blocks arranged in a second direction (Y direction), and each of the plurality of sub-cell blocks may include a plurality of battery cells (111) stacked in a first direction (X direction). For example, an individual battery cell assembly (100) may include two sub-cell blocks arranged in the second direction (Y direction).

[0042] When viewed from a plane, the cell block (110) may have a rectangular shape. In this case, the cell block (110) may have first and second sides that are opposite to each other in a first direction (X direction), front and back sides that are opposite to each other in a second direction (Y direction), and upper and lower surfaces that are opposite to each other in a third direction (Z direction).

[0043] The busbar frame (140) may be arranged on the front and rear sides of the cell block (110), respectively. A plurality of busbars (130) may be mounted on the busbar frame (140) on the front side of the cell block (110), and a plurality of busbars (130) may be mounted on the busbar frame (140) on the rear side of the cell block (110). The busbar frame (140) may support electrode leads (119) of the cell block (110). The electrode leads (119) may include a positive lead and a negative lead provided on each of a plurality of battery cells (see 111 of FIG. 6). The battery cell assembly (100) may include end plates (171) for covering the busbar frame (140) on the front side of the cell block (110) and the busbar frame (140) on the rear side of the cell block (110).

[0044] The busbar frame (140) may include an insulating material. The busbar frame (140) may include a foamable refractory paint. Here, the foamable refractory paint may include a dry coating layer that foams when exposed to heat. The foaming of the dry coating layer may form an insulating layer (e.g., a carbon layer) having a volume several tens of times that of the dry coating layer. The insulating layer may delay heat transfer to a protected object (e.g., a plurality of battery cells (111)) for a certain period of time.

[0045] The busbar (130) may be connected to the electrode leads (119) of the battery cells (111). For example, the busbar (130) may be connected to the electrode leads (119) of the battery cells (111) by welding. For example, each busbar (130) may be connected to electrode leads (119) connected to different battery cells (111) belonging to the cell block (110), and may be an inter-busbar for electrically connecting different battery cells (111). For example, each busbar (130) may be a terminal-busbar for electrically connecting the battery cell assembly (100) with other external electrical devices.

[0046] The case (120) can accommodate the cell block (110). For example, the case (120) can surround the first side, the second side, and the upper surface of the cell block (110). For example, the case (120) can include side walls for covering the first side and the second side of the cell block (110), and an upper wall for covering the upper surface of the cell block (110). The case (120) can be coupled to busbar frames (140) on the front and rear sides of the cell block (110).

[0047] The case (120) may include a cooling plate (121) forming an upper wall of the cell block (110). The cooling plate (121) may be attached to an upper surface of the cell block (110) and thermally coupled to the cell block (110). For example, the cooling plate (121) may be attached to an upper surface of the cell block (110) via a thermal interface material (TIM) layer. The cooling plate (121) may have a cooling channel (1211) configured to allow a cooling fluid to flow therethrough. A cooling fluid provided from the outside of the battery cell assembly (100) may flow into the cooling channel (1211) through an inlet of the cooling channel (1211), flow along the cooling channel (1211), and then flow out to the outside through an outlet of the cooling channel (1211). Cooling of the battery cell assembly (100) may be performed while the cooling fluid flows along the cooling channel (1211). For example, the cooling plate (121) may be manufactured by bonding two plates, and the cooling channel (1211) may include a space defined between the two plates.

[0048] Meanwhile, the busbar frame (140) may include a lower portion (141) on which busbars (130) are mounted, and an upper portion (145) having a receiving space (1451) in which a portion of each of the busbars (130) is received. In the busbar frame (140), the upper portion (145) of the busbar frame (140) may be closer to the cooling plate (121) than the lower portion (141). The upper portion (145) of the busbar frame (140) and the lower portion (141) of the busbar frame (140) may form an integral body.

[0049] Slits (1453) may be provided at the lower side of the receiving space (1451) of the busbar frame (140), and openings (1452) may be provided at the upper side of the receiving space (1451) of the busbar frame (140). The receiving space (1451) of the busbar frame (140) may be in communication with the slits (1453) and the opening (1452). Each of the slits (1453) of the busbar frame (140) may provide a passage through which one busbar (130) passes. When viewed in plan, one slit (1453) may have a dimension generally similar to one busbar (130). Each busbar (130) is inserted into a corresponding slit (1453), and an upper portion of each busbar (130) may be received within the receiving space (1451) of the busbar frame (140). A first portion (1213) of the cooling plate (121) can extend into an accommodation space (1451) of the busbar frame (140) through an opening (1452) of the busbar frame (140). When viewed in plan, the busbars (130) can be arranged in a first direction (X-direction), and the first portion (1213) of the cooling plate (121) can extend linearly and continuously in the first direction (X-direction). A portion of the first portion (1213) of the cooling plate (121) can be embedded in a thermally conductive filler (150). The first portion (1213) of the cooling plate (121) can be in continuous contact with the thermally conductive filler (150) in the first direction (X-direction).

[0050] When viewed in cross section, the first portion (1213) of the cooling plate (121) may extend obliquely from a portion of the cooling plate (121) that faces the upper surface of the cell block (110). For example, when viewed in cross section, the first portion (1213) of the cooling plate (121) may include a portion that is bent downward from a portion of the cooling plate (121) that faces the upper surface of the cell block (110) or a portion of the cooling plate (121) that is in contact with the uppermost end of the busbar frame (140).

[0051] A thermally conductive filler (150) may be provided within the receiving space (1451) of the busbar frame (140). The thermally conductive filler (150) may at least partially fill the receiving space (1451) of the busbar frame (140). The thermally conductive filler (150) may be thermally conductive but electrically insulator. For example, the thermally conductive filler (150) may include a thermally conductive resin. The thermally conductive filler (150) may include a single material layer or multiple material layers. The thermally conductive filler (150) may also be referred to as a thermally conductive material layer.

[0052] The thermally conductive filler (150) may be configured to thermally couple the busbars (130) to the cooling plate (121). The thermally conductive filler (150) may contact the busbars (130) inserted into the receiving space (1451) of the busbar frame (140) through the slits (1453) of the busbar frame (140), and may also contact the first portion (1213) of the cooling plate (121) inserted into the receiving space (1451) of the busbar frame (140) through the openings (1452) of the busbar frame (140). The thermally conductive filler (150) may provide a thermal conduction path for thermally connecting each of the busbars (130) to the cooling plate (121).

[0053] According to exemplary embodiments of the present invention, the busbars (130) are thermally coupled to the cooling plate (121) via a thermally conductive filler (150), thereby improving the cooling efficiency of the busbars (130). Accordingly, thermal damage to the busbars (130) can be prevented, and the reliability of the battery cell assembly (100) can be improved.

[0054]

[0055] (Example 2)

[0056] FIG. 5 is a cross-sectional view illustrating a portion of a battery cell assembly (100A) according to exemplary embodiments of the present invention. Hereinafter, the battery cell assembly (100A) illustrated in FIG. 5 will be described, focusing on differences from the battery cell assembly (100) described with reference to FIGS. 1 to 4.

[0057] Referring to FIG. 5, the thermally conductive filler (150A) may 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) may include different materials. In exemplary embodiments, the first material layer (151) may include silicone and may function as a sealing layer for sealing the bottom portion of the receiving space (1451) of the busbar frame (140). In exemplary embodiments, the second material layer (152) may include a thermally conductive resin and may provide a thermal conduction path for thermally coupling each of the busbars (130) to the cooling plate (121).

[0058]

[0059] (Example 3)

[0060] Fig. 6 is a cross-sectional view illustrating a battery pack (500) according to exemplary embodiments of the present invention. Hereinafter, any description that overlaps with that described above will be omitted or simplified.

[0061] Referring to FIG. 6, a battery pack (500) may include a pack housing (510) and a plurality of battery cell assemblies (100) mounted on the pack housing (510).

[0062] A plurality of battery cell assemblies (100) may be mounted within the pack housing (510) so as to be arranged in a first direction (X direction). In FIG. 6, the battery pack (500) is illustrated as including two battery cell assemblies (100) arranged in the first direction (X direction), but 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 direction).

[0063] The pack housing (510) may include a lower housing (511) having a receiving space in which a plurality of battery cell assemblies (100) are received, and a top plate (515) coupled to the lower housing (511) so as to cover the lower housing (511) in which the plurality of battery cell assemblies (100) are received. The receiving space of the lower housing (511) may be defined by a bottom wall facing a bottom surface of a cell block (110) of an individual battery cell assembly (100), and a side wall positioned on a periphery of the bottom wall. The top plate (515) is a pack lid that covers the plurality of battery cell assemblies (100). When the battery pack (500) is mounted on a vehicle, a cabin room for passengers to board may be located above the top plate (515), and a ground on which the vehicle runs may be located below the lower housing (511).

[0064] In exemplary embodiments, a plurality of battery cell assemblies (100) may be respectively fastened and supported to a corresponding support block (5111) among the support blocks (5111) of the lower housing (511). A fastening portion (127) of the case (120) is provided on one side of each battery cell assembly (100), and the fastening portion (127) may be fastened and supported to a corresponding support block (5111) among the support blocks (5111) of the lower housing (511) through a fastening member such as a bolt (BT).

[0065] In exemplary embodiments, a plurality of battery cell assemblies (100) may each be suspended and supported from a top plate (515). Individual battery cell assemblies (100) may be coupled to a lower surface of the top plate (515).

[0066] Additionally, a free volume (FV) may be provided between the bottom 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 invention is an inverted support structure in which individual battery cell assemblies (100) are suspended and supported from a top plate (515). In addition, a free volume (FV) is provided between the bottom of the battery pack (500) (i.e., the bottom wall of the lower housing (511)) and the individual battery cell assemblies (100). Through the free volume (FV), gas and flame generated in a thermal runaway situation can move. In other words, the free volume (FV) becomes a venting passage through which high-temperature gas and flame can move.

[0068] In addition, even when a foreign substance is thrown to the bottom of the vehicle and a strong impact occurs in a hard ground driving situation such as an unpaved road, the impact can be absorbed through the free volume (FV). Therefore, the plurality of battery cell assemblies (100) can be prevented from being damaged by the impact. The free volume (FV) has an empty space between each of the plurality of battery cell assemblies (100) and the lower housing (511), and when the lower housing (511) is deformed toward the battery cell assembly (100) due to an impact applied to the bottom of the vehicle, the free volume (FV) can be used as a space to freely allow the deformation of the lower housing (511) to a certain extent. Other structures may not be installed in the free volume (FV). Alternatively, a structure that supports the battery cell assemblies (100), etc., may be installed partially within the free volume (FV). When installing a structure within a free volume (FV), a space sufficient to allow deformation of the lower housing (511) must be provided between the 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 the battery cell assembly (100) can be set sufficiently to absorb external impact. The height of the free volume (FV) can be determined in consideration of the dimensions and rigidity of the vehicle frame, the dimensions and rigidity of the lower housing (511), the dimensions of the battery pack (500), the amount of gas generated and the discharge speed during thermal runaway, etc. For example, when the thickness or rigidity of the bottom wall of the vehicle frame or the lower housing (511) is relatively large, at least one of the size and height of the free volume (FV) can be relatively reduced. In addition, when the thickness or rigidity of the bottom wall of the vehicle frame or the lower housing (511) is relatively small, the possibility of deformation of the bottom wall of the lower housing (511) is high, and therefore, in order to protect the battery cell assembly (100), at least one of the size and height of the free volume (FV) can be relatively increased. In addition, when the size of the battery pack (500) is relatively large due to the battery pack (500) specifications, a relatively large free volume (FV) can be secured. When the size of the battery pack (500) is relatively small, the height of the free volume (FV) that can be secured may be relatively small, and the thickness and rigidity of the bottom wall of the lower housing (511) may need to be relatively increased. In addition, when the height of the free volume (FV) is too small, the gas discharge passage becomes small, and the pressure inside the battery pack (500) may rapidly increase in the event of thermal runaway. Therefore, the size and height of the free volume (FV) can be determined by considering the amount of gas generated and the discharge speed.

[0070] The maximum height of the free volume (FV) may be determined depending on the degree of damage to the battery cell (111) included in the battery cell assembly (100). For example, if the damage tolerance of the battery cell (111) is 1 mm, the free volume (FV) may be determined such that the battery cell (111) is not deformed by more than 1 mm when the lower housing (511) is deformed and presses the lower surface of the battery cell (111). In this case, the amount of deformation of the lower housing (511) may vary depending on the thickness or rigidity of the lower housing (511). Therefore, the size or height of the free volume (FV) may be determined by considering both the damage tolerance of the battery cell (111) and the thickness and rigidity of the lower housing (511).

[0071] The upper surface of each battery cell assembly (100) may be tightly coupled with the lower surface of the top plate (515). If there is a space between the battery cell assembly (100) and the top plate (515), during thermal runaway, high-temperature gas may be introduced into the space between one battery cell assembly (100) and the top plate (515), and heat and flame may be transmitted to another adjacent battery cell assembly (100). In addition, there is a concern that heat and flame may be transmitted to the top plate (515), affecting the cabin room located above the top plate (515). Therefore, by tightly coupling the upper surface of each battery cell assembly (100) and the lower surface of the top plate (515), gas or flame generated inside the battery pack (500) can be guided to the free volume (FV).

[0072]

[0073] (Example 4)

[0074] FIG. 7 is a schematic diagram showing an electric vehicle (1000) equipped with a battery pack (1100) according to exemplary embodiments of the present invention.

[0075] In Fig. 7, for simplicity, only the body frame (1200) forming the lower skeleton of the vehicle and the battery pack (1100) and tires coupled to the body frame (1200) are shown. The battery pack (1100) may include, for example, the battery pack (500) described with reference to Fig. 6.

[0076] In a typical battery pack, battery cell assemblies are installed at the bottom of the housing of the battery pack. However, in the present embodiments, the battery cell assemblies (100) of the battery pack (1100) have a structure in which they are suspended and supported 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), the gas generated from the battery cell assembly (100) can be prevented from being transmitted to the cabin room on the upper part of the vehicle. The gas is guided to a free volume (see FV in FIG. 6) provided at the lower side of the housing of the battery cell assembly (100) and the battery pack (1100). The gas can flow through the free volume (FV) and be discharged to the lower part of the vehicle through a gas exhaust port installed in the battery pack (1100). In addition, according to the present embodiments, since a free volume (FV) is provided between the battery cell assembly (100) and the housing within the battery pack (1100), damage to the battery cell assembly (100) can be prevented even if the housing is deformed.

[0077] According to embodiments of the present invention, a battery pack (1100) and an electric vehicle (1000) equipped therewith can enhance passenger safety. Furthermore, the battery cell assembly (100), a core component, can be protected, and the durability of the battery pack (1100) and the electric vehicle (1000) can be improved.

[0078]

[0079] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

Claims

1. A cell block comprising a plurality of battery cells; A bus bar connected to the electrode leads of the above cell block; A busbar frame having a busbar mounted thereon and a receiving space for receiving a portion of the busbar; and A thermally conductive filler at least partially filling the receiving space of the busbar frame and in contact with the busbar; A battery cell assembly comprising:

2. In paragraph 1, A battery cell assembly further comprising a cooling plate disposed on the cell block and in contact with the thermally conductive filler.

3. In paragraph 2, The above busbar frame includes a slit at the lower side of the receiving space and an opening at the upper side of the receiving space, The above busbar is inserted into the receiving space of the busbar frame through the above slit of the busbar frame, A battery cell assembly, characterized in that the first part of the cooling plate is inserted into the receiving space of the busbar frame through the opening of the busbar frame.

4. In paragraph 3, A battery cell assembly, characterized in that at least a portion of the first portion of the cooling plate is embedded in the thermally conductive filler.

5. In paragraph 2, The above cooling plate is bonded to the upper surface of the cell block, A battery cell assembly characterized in that the busbar frame is coupled to one side of the cell block.

6. In paragraph 1, Further comprising another busbar connected to another electrode lead of the above cell block, A battery cell assembly characterized in that the thermally conductive filler is in contact with the other bus bar.

7. In paragraph 1, The above thermally conductive filler is, a first material layer comprising silicon; and A second material layer laminated on the first material layer and including a thermally conductive resin; A battery cell assembly comprising:

8. In paragraph 1, A battery cell assembly characterized in that the above busbar is an inter-busbar connecting different electrode leads of the cell block or a terminal busbar electrically connected to an external electrical device.

9. Pack housing; and A plurality of battery cell assemblies mounted on the pack housing and arranged in a first direction; Each of the above plurality of battery cell assemblies, A cell block comprising a plurality of battery cells; Cooling plate on the above cell block; A plurality of bus bars connected to different electrode leads of the above cell block; A busbar frame including a lower portion on which the plurality of busbars are mounted, and an upper portion having a receiving space for receiving a portion of each of the plurality of busbars and a first portion of the cooling plate; and A thermally conductive filler configured to at least partially fill the receiving space of the busbar frame and contact the plurality of busbars and the cooling plate to thermally couple the plurality of busbars to the cooling plate; Battery pack containing.

10. In paragraph 9, The above busbar frame includes a plurality of slits on the lower side of the receiving space and an opening on the upper side of the receiving space, The plurality of bus bars are each inserted into the receiving space of the bus bar frame through a corresponding slit among the plurality of slits, A battery pack, characterized in that the first part of the cooling plate is inserted into the receiving space of the busbar frame through the opening of the busbar frame.

11. In paragraph 9, The above plurality of bus bars are arranged in the first direction, A battery pack, characterized in that the first portion of the cooling plate extends continuously in the first direction and is in continuous contact with the thermally conductive filler.

12. In paragraph 9, The above cooling plate is bonded to the upper surface of the cell block, A battery pack characterized in that the above busbar frame is coupled to one side of the above cell block.

13. In paragraph 9, a lower housing accommodating the plurality of battery cell assemblies; and a top plate coupled to the lower housing to cover the plurality of battery cell assemblies; A battery pack characterized in that the plurality of battery cell assemblies are suspended and supported from the top plate.

14. In paragraph 13, A battery pack characterized in that the plurality of battery cell assemblies are spaced apart from the bottom wall of the lower housing, and a space is formed between each of the plurality of battery cell assemblies and the bottom wall of the lower housing.

15. In paragraph 9, A battery pack, wherein each of the plurality of battery cell assemblies includes a cell block in which pouch-type battery cells are stacked.

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