Battery cell array, battery pack including same battery cell array, and vehicle including same battery pack

Abstract

A battery cell array according to an embodiment of the present invention comprises: a plurality of battery cells; a side frame supporting the plurality of battery cells and forming the boundary of the battery cell array; at least one cooling unit disposed between the plurality of battery cells and assembled with the side frame such that at least a portion thereof protrudes outside the side frame; a filling member filled between the plurality of battery cells; and a leak prevention portion sealing a gap space generated when the side frame and the at least one cooling unit are assembled, to prevent leakage of the filling member when filling the filling member.

Description

A battery cell array, a battery pack comprising such battery cell array, and a vehicle comprising such battery pack

[0001] The present invention relates to a battery cell array, a battery pack comprising such battery cell array, and an automobile comprising such battery pack, wherein the invention relates to a battery cell array with improved sealing performance, a battery pack comprising such battery cell array, and an automobile comprising such battery pack.

[0002] This application is a priority claim application for Korean Patent Application No. 10-2024-0191517 filed on December 19, 2024, and all contents disclosed in the specification and drawings of said application are incorporated into this application by reference.

[0003] Secondary batteries, which possess electrical characteristics such as high energy density and high applicability across product groups, are widely applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric sources. These secondary batteries are attracting attention as a new energy source for enhancing eco-friendliness and energy efficiency, not only for the primary advantage of drastically reducing the use of fossil fuels but also because they generate no by-products from energy use.

[0004] Currently, widely used types of secondary batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. The operating voltage of these unit secondary battery cells, or unit battery cells, is approximately 2.5V to 4.5V. Therefore, if a higher output voltage is required, a battery pack is formed by connecting multiple battery cells in series. Additionally, depending on the charge / discharge capacity required for the battery pack, a battery cell array is formed by connecting multiple battery cells in parallel, and a battery pack is formed using at least one such battery cell array. Accordingly, the number of battery cells included in the battery pack can be varied depending on the required output voltage or charge / discharge capacity.

[0005] Recently, in the case of battery cell arrays, there has been an increasing number of cases where potting resin is applied as a filler in the empty spaces between components to ensure structural rigidity and prevent heat diffusion. However, since potting resin used as such a filler has low viscosity before curing, leakage may occur through gaps caused by the bottom surface or assembly tolerances between components. In other words, when filling with the filler, leakage of the filler may occur outside the battery cell array through gaps caused by the bottom surface of the battery cell array or assembly tolerances between components.

[0006] Therefore, there is a need to seek a method for providing a battery cell array capable of preventing leakage of the filling material when filling such a filling material, a battery pack including such a battery cell array, and a vehicle including such a battery pack.

[0007] Accordingly, the object of the present invention is to provide a battery cell array capable of preventing leakage of a filling member, a battery pack comprising such battery cell array, and an automobile comprising such battery pack.

[0008] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by those skilled in the art from the description of the invention below.

[0009] To solve the above objective, the present invention provides a battery cell array characterized by comprising: a plurality of battery cells as a battery cell array; a side frame that supports the plurality of battery cells and forms the perimeter of the battery cell array; at least one cooling unit disposed between the plurality of battery cells and assembled with the side frame such that at least a portion protrudes outside the side frame; a filling member filled between the plurality of battery cells; and a leak prevention member that seals the gap space generated when assembling the side frame and the at least one cooling unit so as to prevent leakage of the filling member when the filling member is filled.

[0010] Additionally, preferably, the battery cell array may include the plurality of battery cells and a sheet member provided at the bottom of the side frame.

[0011] In addition, preferably, the leak prevention member can fill the gap space.

[0012] Additionally, preferably, the leak prevention member may include a foam member.

[0013] Additionally, preferably, the side frame is provided with a cooling unit passage that protrudes a part of the at least one cooling unit out of the side frame and forms a gap space when assembled, and the leak prevention member can seal the cooling unit passage where the gap space is formed.

[0014] Additionally, preferably, the cooling unit passage portion is formed with a step at a predetermined depth from the outer surface of the side frame; and includes a passage groove provided in the step portion for passing a part of the cooling unit through, and the leak prevention portion can be filled in the step portion to seal the gap of the passage groove.

[0015] Additionally, preferably, the side frame comprises a pair of side walls provided on both outermost sides of the plurality of battery cells; and a plurality of side structures provided between the pair of side walls, wherein the cooling unit passages are provided in a plurality and are provided in both the pair of side walls and the plurality of side structures, and the leak prevention members may be provided in a plurality so as to seal all the gap spaces of the plurality of cooling unit passages.

[0016] Additionally, preferably, the sheet member may include an insulating material.

[0017] Additionally, preferably, the sheet member may be provided as a polycarbonate sheet.

[0018] Additionally, preferably, the battery cell array may include an adhesive member applied to the edge of the sheet member so as to fix the sheet member to the side frame.

[0019] Additionally, preferably, the filling member may include a resin having adhesive properties.

[0020] Additionally, preferably, the edge of the sheet member can be sealed while being pressed by the weight of the side frame when the side frame is seated.

[0021] And, the present invention provides a battery pack characterized by comprising at least one battery cell array according to the embodiments described above as a battery pack.

[0022] In addition, the present invention provides a vehicle characterized by including at least one battery pack according to the above-described embodiment.

[0023] According to various embodiments as described above, a battery cell array capable of preventing leakage of a filling member, a battery pack including such a battery cell array, and a vehicle including such a battery pack can be provided.

[0024] In addition, various other additional effects may be achieved by various embodiments of the present invention. These various effects of the present invention are described in detail in each embodiment, or the description of effects that are easily understood by those skilled in the art is omitted.

[0025] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings.

[0026] FIG. 1 is a drawing for explaining a battery cell array according to one embodiment of the present invention.

[0027] FIG. 2 is an exploded perspective view of a battery cell array according to one embodiment of the present invention.

[0028] FIG. 3 is a drawing illustrating the prevention of leakage of a filling material through a leak prevention part of a battery cell array according to one embodiment of the present invention.

[0029] FIG. 4 is a drawing showing the battery cell array according to one embodiment of the present invention excluding the leak prevention part.

[0030] FIG. 5 is a bottom view of a battery cell array according to one embodiment of the present invention.

[0031] FIG. 6 is a bottom view showing the battery cell array according to one embodiment of the present invention excluding the sheet member.

[0032] FIG. 7 is a drawing for explaining the assembly of battery cells, a side frame, and a cooling unit of a battery cell array according to one embodiment of the present invention.

[0033] Figure 8 is an enlarged view of the main part of Figure 7.

[0034] FIG. 9 is a drawing for explaining a leak prevention part according to an embodiment of the present invention.

[0035] FIG. 10 is a drawing illustrating a leak prevention member mounted on the side wall of a side frame of a battery cell array according to one embodiment of the present invention.

[0036] FIG. 11 is a drawing for explaining a leak prevention member mounted on a side structure of a side frame of a battery cell array according to one embodiment of the present invention.

[0037] FIGS. 12 and FIGS. 13 are drawings for explaining the mounting process of a sheet member in a battery cell array according to one embodiment of the present invention.

[0038] FIG. 14 is a drawing for illustrating a battery cell array according to another embodiment of the present invention.

[0039] FIG. 15 is a drawing for explaining a battery pack according to one embodiment of the present invention.

[0040] FIG. 16 is a drawing for explaining an automobile according to one embodiment of the present invention.

[0041] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0042] Therefore, 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; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0043] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back may be used in this specification, these terms are used merely for convenience of explanation and may vary depending on the location of the object or the position of the observer, as is obvious to those skilled in the art of this invention.

[0044]

[0045] FIG. 1 is a drawing for explaining a battery cell array according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a battery cell array according to an embodiment of the present invention, FIG. 3 is a drawing for explaining how a filling material is prevented from leaking through a leak prevention part of a battery cell array according to an embodiment of the present invention, and FIG. 4 is a drawing showing a battery cell array according to an embodiment of the present invention excluding the leak prevention part.

[0046] Referring to FIGS. 1 to 4, the battery cell array (10) may include a plurality of battery cells (100), a side frame (200), a cooling unit (300), a filling member (400), and a leak prevention member (500).

[0047] The plurality of battery cells (100) above may be provided as secondary batteries, such as cylindrical secondary batteries, pouch-type secondary batteries, or prismatic secondary batteries. Hereinafter, in this embodiment, the description is limited to the plurality of battery cells (100) being provided as cylindrical secondary batteries. The plurality of battery cells (100) may be arranged in multiple numbers in both the length direction (Y-axis direction) and the width direction (X-axis direction) of the battery cell array (10) to achieve a large capacity of the battery cell array (10).

[0048] The above side frame (200) can support the plurality of battery cells (100). The above side frame (200) can form the border of the battery cell array (10).

[0049] The cooling unit (300) is for cooling the plurality of battery cells (100) and may be formed to be long in a predetermined length along the longitudinal direction (Y-axis direction) of the battery cell array (10). The cooling unit (300) is disposed between the plurality of battery cells (100) and may be provided as at least one or more multiple units. Hereinafter, in this embodiment, the description is limited to the case where the cooling unit (100) is provided as multiple units.

[0050] The cooling unit (300) may be assembled with the side frame (200) such that at least a portion of it protrudes out of the side frame (200). This is to connect the cooling unit (300) to an external cooling device. Meanwhile, when assembling the cooling unit (300) and the side frame (200), a gap space (G, see FIG. 4) according to assembly tolerance may be formed between the cooling unit (300) and the side frame (200).

[0051] The filling member (400) can be filled between the plurality of battery cells (100). The filling member (400) may be provided with potting resin. Such a filling member (400) can reinforce the structural rigidity of the battery cell array (10). In addition, the filling member (400) can prevent heat diffusion between adjacent battery cells (100), thereby suppressing heat propagation that may occur between adjacent battery cells (100) during a thermal event.

[0052] The above leak prevention member (500) can seal the gap space (G, see FIG. 4) that occurs when assembling the side frame (200) and the at least one cooling unit (300) so as to prevent leakage of the filling member (400) when the filling member (400) is filled. The filling member (400) provided with the potting resin has low viscosity before curing when filled between the battery cells (100), so it may leak into the aforementioned gap space (G) before curing.

[0053] According to one embodiment of the present invention, since the leak prevention part (500) seals the gap space (G), leakage of the thin filling material (400) through the gap space (G) before it hardens can be fundamentally prevented when the filling material (400) is filled.

[0054] In this way, in the battery cell array (10) according to one embodiment of the present invention, the filling member (400) can be filled between the battery cells (100) without leakage or spillage of the filling member (400).

[0055] Accordingly, according to one embodiment of the present invention, in a battery cell array (10) having a filling structure of the filling member (400), high airtightness and watertightness performance can be secured, and product reliability can also be significantly increased.

[0056]

[0057] FIG. 5 is a bottom view of a battery cell array according to one embodiment of the present invention, and FIG. 6 is a bottom view showing the battery cell array according to one embodiment of the present invention excluding the sheet member.

[0058] Referring to FIGS. 5, FIGS. 6 and the preceding drawings, the battery cell array (10) may include a sheet member (600).

[0059] The above sheet member (600) may be provided at the bottom of the plurality of battery cells (100) and the side frame (200). This sheet member (600) may be provided with a size that can cover the entire bottom area of ​​the battery cell array (10) and may form the bottom area of ​​the battery cell array (10).

[0060] According to one embodiment of the present invention, the sheet member (600) is provided at the bottom of the plurality of battery cells (100) and the side frame (200) and covers the entire bottom area of ​​the battery cell array (10), so that when the filling member (400) is filled, leakage of the thin filling member (400) into the bottom of the battery cell array (10) before it hardens can be prevented.

[0061] In this way, in the battery cell array (10) according to one embodiment of the present invention, leakage or spillage of the filling member (400) that may occur at the bottom side of the battery cell array (10) during injection for filling the filling member (400) can also be effectively prevented.

[0062] The above sheet member (600) may include an insulating material. Such a sheet member (600) can effectively prevent the risk of a short circuit of the battery cells (100) that may occur in the external environment of the battery cell array (10), particularly on the bottom side of the battery cell array (10).

[0063] The above sheet member (600) may be provided as a polycarbonate sheet. That is, the above sheet member (600) may be provided as a PC sheet.

[0064] In this embodiment, through the sheet member (600) as described above, leakage of the filling member (400) at the bottom side of the battery cell array (10) can be prevented, and insulation performance can also be secured.

[0065]

[0066] Below, we will examine the leak prevention part (500) in more detail.

[0067] The leak prevention member (500) can fill the gap space (G, see FIG. 4). Specifically, the leak prevention member (500) can cover the gap space (G) to prevent leakage or spillage of the filling material (400) outside the gap space (G). In other words, the leak prevention member (500) can fill the gap space (G) to seal the gap space (G). Therefore, when the filling material (400) is injected, the filling material (400) in a liquid state cannot escape outside the gap space (G), that is, outside the battery cell array (10), due to the leak prevention member (500).

[0068] The leak prevention member (500) may include a foam member. Additionally, the leak prevention member (500) may be provided with foam tape. For example, the leak prevention member (500) may be provided with a CR sponge (Cloroprene Sponge). Therefore, in this embodiment, the sealing performance of the gap space (G) can be secured with a simpler structure without adding or changing a separate complex structure.

[0069] The above leak prevention member (500) may include an insulating material. Such a leak prevention member (500) can also effectively prevent the risk of a short circuit of the battery cells (100) that may occur in the external environment of the battery cell array (10).

[0070]

[0071] FIG. 7 is a drawing for explaining the assembly of battery cells, a side frame, and a cooling unit of a battery cell array according to an embodiment of the present invention; FIG. 8 is an enlarged view of the main part of FIG. 7; FIG. 9 is a drawing for explaining a leak prevention part according to an embodiment of the present invention; FIG. 10 is a drawing for explaining a leak prevention part mounted on the side wall of a side frame of a battery cell array according to an embodiment of the present invention; and FIG. 11 is a drawing for explaining a leak prevention part mounted on a side structure of a side frame of a battery cell array according to an embodiment of the present invention.

[0072] Referring to FIGS. 7 through 11 and the preceding drawings, the side frame (200) may be provided with a cooling unit passage (250) that protrudes a part of the at least one cooling unit (300) out of the side frame (200) and forms a gap space (G, see FIG. 4) upon assembly. In this embodiment, the leak prevention part (500) may seal the cooling unit passage (250) in which the gap space (G) is formed.

[0073] The above cooling unit passage portion (250) may include a step portion (252) and a passage groove (255).

[0074] The stepped portion (252) is provided at one end of the side frame (200) and can be formed to be stepped from the outer surface of the side frame (200) to a predetermined depth. This stepped portion (252) can minimize interference, such as collisions between mutual components, when assembling the side frame (200) and the cooling unit (300).

[0075] The above passage groove (255) is provided in the above step portion (252) and can pass a part of the cooling unit (300). A part of the cooling unit (300) can protrude out of the side frame (200) and be placed within the passage groove (255).

[0076] The leak prevention member (500) can be filled into the stepped portion (252) to seal the gap of the through groove (255). Specifically, the leak prevention member (500) can be seated on the stepped portion (252) and cover the gap of the through groove (255), while filling the space formed according to the step of the stepped portion (252).

[0077] The above side frame (200) may include a pair of side walls (210) and a plurality of side structures (230).

[0078] The above pair of side walls (210) may be provided on both outermost sides of the plurality of battery cells (100). These pair of side walls (210) may be provided on both outermost sides in the width direction (X-axis direction) of the battery cell array (10) to form the side exterior of the battery cell array (10). Each of these pair of side walls (210) may be able to accommodate and support a row of the battery cells (100).

[0079] The plurality of side structures (230) may be provided between the pair of side walls (230). The plurality of side structures (230) may be arranged between the pair of side walls (230) in the width direction (X-axis direction) of the battery cell array (10). Each of these plurality of side structures (230) may be able to accommodate and support two rows of battery cells (100).

[0080] The cooling unit passage (250) may be provided in a plurality and may be provided in both the pair of side walls (210) and the plurality of side structures (230). The plurality of cooling unit passages (250) may be arranged in pairs facing each other with the cooling unit (300) in between. The passage grooves (255) of the facing pair of cooling unit passages (250) may form a groove structure through which a part of a cooling tube (300) can pass.

[0081] The leak prevention member (500) may be provided in multiple numbers to seal all of the gap spaces (G) of the plurality of cooling unit passing members (250). Accordingly, in this embodiment, sealing performance can be secured in all of the gap spaces (G) of the plurality of cooling unit passing members (250) through the plurality of leak prevention members (500).

[0082] The plurality of leak prevention members (500) may be arranged facing each other with each cooling unit (300) in between. A pair of leak prevention members (500) arranged facing each cooling unit (300) may be placed in a pair of cooling unit passages (250) provided on both sides of the cooling unit (300). A pair of leak prevention members (500) arranged facing each cooling unit (300) may have a predetermined elasticity and may be formed to be slightly larger than the size of the pair of cooling unit passages (250) provided on both sides of the cooling unit (300). Accordingly, a pair of leak prevention members (500) positioned facing each other with each cooling unit (300) in between can press against each other when positioned in a pair of cooling unit passages (250) provided on both sides of the cooling unit (300). Due to this pressurization, the pair of cooling unit passages (250) provided on both sides of the cooling unit (300) can be sealed more effectively.

[0083] In addition, in this embodiment, since the plurality of leak prevention parts (530) have a certain elasticity, collisions that may occur during the assembly of the side frame (200) and the cooling unit (300) can be cushioned, thereby effectively preventing the risk of damage to the side frame (200) and the cooling unit (300).

[0084] Each of the above-mentioned plurality of leak prevention parts (500) may include a body part (510) and a protrusion part (530).

[0085] The body portion (510) has a predetermined elasticity and can be formed to a predetermined length along the height direction (Z-axis direction) of the side frame (200). The body portion (510) can be at least partially seated on the stepped portion (252) along the length direction (Z-axis direction) of the passage groove (255) of the cooling unit passage portion (250).

[0086] The above protrusions (530) may be provided as a pair. The pair of protrusions (530) may have a predetermined elasticity and may be formed to protrude a predetermined length along the width direction (X-axis direction) of the side frame (200) from both ends (Z-axis direction) of the body part (510). The pair of protrusions (530) may be seated on the stepped portion (252) of the cooling unit passage part (250) so as to be positioned on the upper and lower sides (+Z-axis direction and -Z-axis direction) of the passage groove (255).

[0087] The plurality of leak prevention members (530), which are provided with the body part (510) and the pair of protrusions (530), can be fixedly mounted on the cooling unit passages (250) of the pair of side walls (210) of the side frame (200) and the plurality of side structures (230). Here, in the case of the pair of side walls (210), as shown in FIG. 10, one cooling unit passage (250) is provided for each, and one leak prevention member (530) is fixedly mounted, and in the case of the plurality of side structures (230), as shown in FIG. 11, two cooling unit passages (250) are provided for each, and two leak prevention members (530) can be fixedly mounted.

[0088]

[0089] FIGS. 12 and FIGS. 13 are drawings for explaining the mounting process of a sheet member in a battery cell array according to one embodiment of the present invention.

[0090] Referring to FIG. 12, when the assembly of the side frame (200) supporting the plurality of battery cells (100) and the cooling unit (300) is completed, the seat member (600) can be mounted on the bottom of the battery cell array (10). As previously described, when assembling the side frame (200) and the cooling unit (300), the plurality of leak prevention members (500) and the gap space (G, see FIG. 4) can also be fixedly mounted to the side frame (200) to seal the gap space (G, see FIG. 4).

[0091] The battery cell array (10) may include an adhesive member (700) applied to the edge of the sheet member (600) to more stably fix the sheet member (600) to the side frame (200). Once the fixation of the sheet member (600) at the bottom side of the battery cell array (10) is completed, the filling member (400) can be injected from the upper side (+Z-axis direction) of the battery cell array (10) to fill the filling member (400) between the battery cells (100). In this embodiment, through the leak prevention member (500) and the sheet member (600), leakage or spillage of the thin filling member (400) before it hardens during filling can be effectively prevented.

[0092] Referring to FIG. 13, the battery cell array (10) may also fix the sheet member (600) to the bottom of the side frame (200) and the battery cells (100) through an adhesive resin. To this end, the filling member (400) may include an adhesive resin. Accordingly, the sheet member (600) can be fixed to at least one of the bottom of the battery cells (100) and the side frame (200) as the filling member (400) hardens without a separate adhesive member (700).

[0093] Additionally, the edge of the sheet member (600) can be sealed by being pressed by the weight of the side frame (200) when the side frame (200) is seated. In this way, it is possible to seal the edge of the sheet member (600) solely by the weight of the side frame (200) without a separate adhesive member (700) or a resin having adhesive properties.

[0094]

[0095] Referring again to FIGS. 1 and FIGS. 2, the filling member (400) may include silicone resin. It is not limited thereto, and it is obvious that the filling member (400) may include other resin materials in addition to the silicone resin that can improve the fixation and heat dissipation efficiency of the battery cells (100).

[0096] The battery cell array (10) may include a busbar assembly (800).

[0097] The busbar assembly (800) is provided above the plurality of battery cells (100) and can be electrically connected to the plurality of battery cells (100). In this embodiment, both the positive and negative electrodes of the battery cells (100) can be provided above the battery cell array (10). Accordingly, the electrical connection between the busbar assembly (800) and the battery cells (100) can be fully implemented above the battery cell array (10). Meanwhile, the filling member (400) can be filled to cover the busbar assembly (800).

[0098] The battery cell array (10) may include a connecting pipe (900).

[0099] The above connecting pipe (900) can connect the plurality of cooling units (300). The above connecting pipe (900) may be provided in multiple numbers. Additionally, the above connecting pipe (900) can be connected to the external cooling device to guide the connection between the cooling unit (300) and the external cooling device.

[0100] The above connecting pipe (900) can supply a cooling medium supplied from the external cooling device to the cooling units (300) and guide the cooling medium circulated through the cooling units (300) to be discharged to the external cooling device. To this end, a cooling channel for the circulation of the cooling medium may be provided inside the cooling units (300).

[0101] The cooling medium may be provided as a cooling fluid capable of circulating the cooling units (300) while cooling the battery cells (100). For example, the cooling medium may be provided as cooling water. It is not limited thereto, and it is of course possible that the cooling medium may be provided as other cooling fluids capable of circulating the cooling units (300) while cooling the battery cells (100).

[0102]

[0103] FIG. 14 is a drawing for illustrating a battery cell array according to another embodiment of the present invention.

[0104] Since the battery cell array (20) according to the present embodiment is similar to the battery cell array (10) of the preceding embodiment, redundant descriptions of configurations that are substantially identical or similar to the preceding embodiment will be omitted, and the following will focus on the differences from the preceding embodiment.

[0105] Referring to FIG. 14, the battery cell array (20) may include the plurality of battery cells (100), the side frame (200), the cooling unit (300), and the leak prevention unit (505).

[0106] Since the plurality of battery cells (100), the side frame (200), and the cooling unit (300) are substantially identical or similar to the preceding embodiment, redundant description is omitted below. Additionally, although not illustrated, the battery cell array (20) may also include the filling member (400, see FIG. 1 and 2) and the sheet member (600, see FIG. 1 and 2). Furthermore, the battery cell array (20) may include the busbar assembly (800, see FIG. 1 and 2) and the connecting pipe (900, see FIG. 1 and 2).

[0107] The leak prevention part (505) may be provided with a foam material that hardens after injection, such as by a spray type. For example, the leak prevention part (505) may be provided with urethane foam. The leak prevention part (505) may be hardened after being injected into the cooling unit passage part (250). Once the hardening of the leak prevention part (505) after injection is completed, the filling member (400, see FIG. 1 and FIG. 2) may be filled. In this way, the leak prevention part (505) may also be provided in the form of a foam material that hardens after being sprayed as a spray type.

[0108] Accordingly, in this embodiment, the space of the cooling unit passing section (250) can be filled by injecting the leak prevention section (505), so that the gap space of the cooling unit passing section (250) can be sealed with a more simplified process.

[0109]

[0110] FIG. 15 is a drawing for explaining a battery pack according to an embodiment of the present invention, and FIG. 16 is a drawing for explaining a vehicle according to an embodiment of the present invention.

[0111] Referring to FIG. 15, the battery pack (1) may include at least one battery cell array (10, 20) and a pack case (50) that accommodates the at least one battery cell array (10, 20).

[0112] The above battery pack (1) may further include an electric field unit.

[0113] The above electrical unit may include electrical components such as a BMS that controls the battery cell array (10, 20) of the battery pack (1) and is provided in the pack case (500). The above electrical unit may further include components such as a current sensor, a fuse, and a service plug.

[0114] Referring to FIG. 16, a vehicle (V) according to one embodiment of the present invention may include at least one battery pack (1) according to the present invention. In addition, the vehicle (V) according to one embodiment of the present invention may include various other components included in the vehicle in addition to the battery pack (1). For example, the vehicle (V) according to one embodiment of the present invention may include, in addition to the battery pack (1) according to one embodiment of the present invention, a vehicle body, a motor, an ECU (electronic control unit), or a control device.

[0115] In addition, it is obvious that the battery pack (1) according to one embodiment of the present invention may also be provided in other devices, mechanisms, and facilities, such as an energy storage system using a secondary battery, in addition to the vehicle (V).

[0116] According to various embodiments as described above, a battery cell array (10, 20) capable of preventing leakage of the filling member (400), a battery pack (1) including the battery cell array (10, 20), and a vehicle (V) including the battery pack (1) can be provided.

[0117]

[0118] As described above, although the present invention has been explained by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs.

Claims

1. In a battery cell array, Multiple battery cells; A side frame that supports the plurality of battery cells and forms the perimeter of the battery cell array; At least one cooling unit disposed between the plurality of battery cells and assembled with the side frame such that at least a portion protrudes outside the side frame; A filling member filled between the plurality of battery cells; and A leak prevention member that seals the gap space generated when assembling the side frame and the at least one cooling unit so as to prevent leakage of the filling member when filling the filling member. A battery cell array characterized by including 2. In Paragraph 1, The plurality of battery cells and the seat member provided at the bottom of the side frame A battery cell array characterized by including 3. In Paragraph 1, The above leak prevention unit is, A battery cell array characterized by filling the above gap space.

4. In Paragraph 1, The above leak prevention unit is, A battery cell array characterized by including a foam member.

5. In Paragraph 1, In the above side frame, A cooling unit passage is provided that protrudes a part of the above-mentioned at least one cooling unit outside the side frame, and forms the gap space upon assembly. The above leak prevention unit is, A battery cell array characterized by sealing the cooling unit passage where the gap space is formed.

6. In Paragraph 5, The above cooling unit passage section is, A stepped portion formed with a predetermined depth from the outer surface of the above side frame; and It is provided in the above-mentioned stepped portion and includes a passage groove for passing a part of the cooling unit through, The above leak prevention unit is, A battery cell array characterized by being filled in the stepped portion to seal the gap of the above-mentioned through groove.

7. In Paragraph 5, The above side frame is, A pair of side walls provided on both outermost sides of the plurality of battery cells; and It includes a plurality of side structures provided between the above pair of side walls, and The above cooling unit passage section is, Provided in multiple units and provided on both the pair of side walls and the multiple side structures, The above leak prevention unit is, A battery cell array characterized by being provided in multiple units so as to seal all the gap spaces of the plurality of cooling unit passages.

8. In Paragraph 2, The above sheet member is, A battery cell array characterized by including an insulating material.

9. In Paragraph 2, The above sheet member is, A battery cell array characterized by being made of a polycarbonate sheet.

10. In Paragraph 2, An adhesive member applied to the edge of the sheet member so as to fix the sheet member to the side frame. A battery cell array characterized by including 11. In Paragraph 2, The above-mentioned filling member is, A battery cell array characterized by including a resin having adhesive properties.

12. In Paragraph 2, The edge of the above sheet member is, A battery cell array characterized by being sealed while being pressed by the weight of the side frame when the side frame is seated.

13. Regarding battery packs, A battery pack characterized by including at least one battery cell array according to any one of claims 1 to 12.

14. In automobiles, An automobile characterized by including at least one battery pack according to Clause 13.

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