Battery cell array, battery pack comprising battery cell array, and vehicle comprising battery pack

Abstract

A battery cell array according to one embodiment of the present invention comprises: a plurality of battery cells; and a filler section that is filled so as to cover the plurality of battery cells and comprises at least two types of filling members.

Description

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

[0001] This application is a priority claim application for Korean Patent Application No. 10-2025-0011917 filed on January 24, 2025, and all contents disclosed in the specification and drawings of said application are incorporated into this application by reference.

[0002] The present invention relates to a battery cell array, a battery pack including the battery cell array, and an automobile including the battery pack, wherein the invention relates to a battery cell array with improved cost competitiveness and processability, a battery pack including the battery cell array, and an automobile including the battery pack.

[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, multiple battery cells are connected in series to form a battery pack. Additionally, depending on the charge / discharge capacity required for the battery pack, multiple battery cells are connected in parallel to form a battery pack. 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] Meanwhile, when configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to first configure a battery cell array containing at least one battery cell, and then use this at least one battery cell array to add other components to form the battery pack.

[0006] A conventional battery cell array comprises a plurality of battery cells, a plurality of cooling tubes provided between the sides of the plurality of battery cells, and a filling material filled to cover the plurality of battery cells and the plurality of cooling tubes. This conventional battery cell array cools the battery cells using a so-called side cooling method, which secures cooling performance by providing a plurality of cooling tubes between the sides of the battery cells. Furthermore, the filling material is generally provided with silicone resin to prevent heat propagation from a battery cell in which an abnormal situation occurs to adjacent battery cells, thereby minimizing the risk of chain ignition.

[0007] However, in the case of conventional battery cell arrays, a significant amount of silicone resin is required due to the structure in which the silicone resin used as a filling material fills all the components constituting the battery cell array, including the battery cells. This raises manufacturing costs and acts as a factor that hinders cost competitiveness.

[0008] In addition, in the case of conventional battery cell arrays, since multiple cooling tubes must be installed between the sides of the battery cells, the manufacturing process is complex, and there is a high possibility of process management issues arising from interference or collision between the cooling tubes and the battery cells.

[0009] Therefore, there is a need to explore ways to provide a battery cell array that can prevent heat propagation and ensure cooling performance while increasing cost competitiveness and manufacturing process efficiency.

[0010] Accordingly, the object of the present invention is to provide a battery cell array capable of preventing heat propagation and ensuring cooling performance while improving cost competitiveness, a battery pack including such a battery cell array, and an automobile including such a battery pack.

[0011] In addition, another objective of the present invention is to provide a battery cell array capable of increasing manufacturing process efficiency, a battery pack comprising such battery cell array, and an automobile comprising such battery pack.

[0012] 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.

[0013] 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; and a filling portion that is filled to cover the plurality of battery cells and includes at least two types of filling members.

[0014] Additionally, preferably, at least one of the at least two types of filling materials comprises potting resin, and at least one of the at least two types of filling materials may comprise paraffin resin.

[0015] Additionally, preferably, the at least two types of filling materials are filled so as to be stacked together along the height direction of the plurality of battery cells, and the filling materials facing each other in the height direction may be provided as different filling materials.

[0016] Additionally, preferably, the filling member may include: a first filling member filled to cover one side of the plurality of battery cells; a second filling member filled to cover the other side of the plurality of battery cells; and a third filling member filled to cover the side of the plurality of battery cells between the first filling member and the second filling member, and having a higher cooling performance than the first filling member and the second filling member.

[0017] Additionally, preferably, the third filling member may include paraffin resin.

[0018] Additionally, preferably, the first filling member and the second filling member may include potting resin.

[0019] Additionally, preferably, the first filling member and the second filling member may include silicone resin.

[0020] Additionally, preferably, the battery cell array may include a base plate having at least one venting opening that supports one side of the plurality of battery cells and guides the vent portion of the plurality of battery cells.

[0021] Additionally, preferably, the battery cell array may include a cooling plate of a predetermined length for cooling the plurality of battery cells, which is provided on the upper or lower side of the plurality of battery cells.

[0022] Additionally, preferably, the battery cell array may include a busbar unit that is covered by the filling portion and electrically connects the plurality of battery cells.

[0023] Additionally, preferably, the cooling plate may be provided with at least one cooling channel through which a cooling medium for cooling the plurality of battery cells flows.

[0024] And, the present invention provides a battery pack characterized by comprising, as a battery pack, at least one battery cell array according to the embodiments described above; and a pack case accommodating the at least one battery cell array.

[0025] In addition, the present invention provides a vehicle characterized by comprising at least one battery pack according to the above-described embodiment.

[0026] According to the various embodiments described above, a battery cell array capable of preventing heat propagation and securing cooling performance while improving cost competitiveness, a battery pack including such a battery cell array, and an automobile including such a battery pack can be provided.

[0027] In addition, according to various embodiments as described above, a battery cell array capable of increasing manufacturing process efficiency, a battery pack including such a battery cell array, and a vehicle including such a battery pack can be provided.

[0028] 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.

[0029] 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.

[0030] FIG. 1 is a drawing for explaining a battery cell array according to one embodiment of the present invention.

[0031] FIG. 2 is a drawing for explaining the lower venting of a battery cell array according to one embodiment of the present invention.

[0032] FIG. 3 is a drawing illustrating the seating of battery cells on a base plate during the manufacturing process of a battery cell array according to one embodiment of the present invention.

[0033] FIGS. 4 and 5 are drawings for explaining the injection of a first filling member of a filling portion during a manufacturing process of a battery cell array according to an embodiment of the present invention.

[0034] FIGS. 6 and 7 are drawings for explaining the injection of a third filling member of a filling portion during the manufacturing process of a battery cell array according to an embodiment of the present invention.

[0035] FIG. 8 is a drawing illustrating the mounting of a busbar unit and a cooling plate during the manufacturing process of a battery cell array according to one embodiment of the present invention.

[0036] FIG. 9 is a drawing for explaining the injection of a second filling member of a filling part during the manufacturing process of a battery cell array according to one embodiment of the present invention.

[0037] FIG. 10 is a drawing for illustrating a battery cell array according to another embodiment of the present invention.

[0038] FIG. 11 is a drawing for illustrating a battery cell array according to another embodiment of the present invention.

[0039] FIGS. 12 to 15 are drawings for explaining the manufacturing process of a battery cell array according to another embodiment of the present invention.

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

[0041] FIG. 17 is a drawing for explaining an automobile according to one embodiment of the present invention.

[0042] 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.

[0043] 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.

[0044] 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.

[0045]

[0046] FIG. 1 is a drawing for explaining a battery cell array according to an embodiment of the present invention, and FIG. 2 is a drawing for explaining the lower venting of a battery cell array according to an embodiment of the present invention.

[0047] Referring to FIGS. 1 and 2, the battery cell array (10) may include a plurality of battery cells (100) and a filling portion (200).

[0048] 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 case where the plurality of battery cells (100) are provided as cylindrical secondary batteries.

[0049] The filling portion (200) can be filled to completely cover the plurality of battery cells (100). The filling portion (200) can be configured to include at least two types of filling members (210, 230, 250).

[0050] In one embodiment of the present invention, compared to a conventional structure in which a single filling member covers multiple battery cells, the filling member (200) can be composed of various types of filling members (210, 230, 250) optimized for various functions or effects required during manufacturing or design, such as heat propagation prevention and cooling performance. In the case where the filling member is composed of a single filling member in the past, the function or effect of the filling member was inevitably skewed toward either heat propagation prevention or cooling performance. Furthermore, even if a single filling member is configured to encompass various functions, such as heat propagation prevention and securing cooling performance, it was difficult to satisfy the conditions requiring both heat propagation prevention and cooling performance due to the characteristics of the single filling member.

[0051] In one embodiment of the present invention, the filling part (200) can be composed of various types of filling materials (210, 230, 250) optimized for each of the various functions or effects required during design, so that all of the various functions or effects required during design can be optimally realized.

[0052] Specifically, at least one (210, 230) of the at least two types of filling materials (210, 230, 250) comprises potting resin, and at least one (250) of the at least two types of filling materials (210, 230, 250) may comprise paraffin resin. According to one embodiment of the present invention, heat propagation prevention can be maximized with the filling material (210, 230) comprising potting resin, and cooling performance can be maximized with the filling material (250) comprising paraffin resin.

[0053] The at least two types of filling members (210, 230, 250) can be filled by stacking the plurality of battery cells (100) along the height direction (Z-axis direction). The at least two types of filling members (210, 230, 250) can be filled so as to completely cover the plurality of battery cells (100) while stacking them. The filling members (210, 230, 250) facing each other in the height direction (Z-axis direction) may be provided as different filling members (210, 230, 250).

[0054]

[0055] Below, the filling portion (200) of the present invention is examined in more detail.

[0056] The above filling portion (200) may include a first filling member (210), a second filling member (230), and a third filling member (250).

[0057] The first filling member (210) can be filled to cover one side (-Z-axis direction) of the plurality of battery cells (100). Specifically, the first filling member (210) can be filled to cover the lower portion (-Z-axis direction) of the plurality of battery cells (100).

[0058] The second filling member (230) can be filled to cover the other side (+Z-axis direction) of the plurality of battery cells (100). Specifically, the second filling member (230) can be filled to cover the upper portion (+Z-axis direction) of the plurality of battery cells (100).

[0059] The third filling member (250) can be filled to cover the sides of the plurality of battery cells (100) between the first filling member (210) and the second filling member (230). This third filling member (250) can have higher cooling performance than the first filling member (210) and the second filling member (230). Through the third filling member (250) having such cooling performance, the cooling performance of the battery cells (100) can be secured without a plurality of cooling tubes separately provided between the plurality of battery cells (100).

[0060] Specifically, the third filling member (250) may include paraffin resin. The paraffin resin may include paraffin material. The paraffin resin containing the paraffin material may increase heat capacity while existing as a solid in a range below a predetermined temperature, and may increase the cooling performance of the battery cells (100) through the latent heat of phase change while undergoing a phase change into a liquid state in a range above a predetermined temperature. The predetermined temperature may be approximately 40°C.

[0061] In this embodiment, the battery cells (100) can be effectively cooled without the need for multiple cooling tubes mounted between the sides of the battery cells (100) through such a paraffin resin. Furthermore, in this embodiment, multiple cooling tubes between the sides of the battery cells (100) can be omitted, thereby resolving process management issues such as interference or collision with the battery cells caused by the mounting of multiple cooling tubes in the past. In addition, in this embodiment, the manufacturing process of the battery cell array (10) can be made simpler by omitting the multiple cooling tubes. Moreover, in this embodiment, a battery cell array (10) with a simpler structure can be provided by omitting the multiple cooling tubes, thereby ensuring ease of design of the battery cell array (10) while increasing design freedom.

[0062] The first filling member (210) and the second filling member (230) may include a potting resin. The potting resin may include a material having high heat resistance. Accordingly, the first filling member (210) and the second filling member (230) can effectively prevent heat propagation to adjacent battery cells (110) when a thermal event occurs due to overheating, etc., in at least one specific battery cell (110) among the plurality of battery cells (110).

[0063] Specifically, the first filling member (210) and the second filling member (230) may include silicone resin. Since the silicone resin has high heat resistance, it can more effectively prevent heat propagation to adjacent battery cells (110) when the thermal event occurs. When the thermal event occurs, heat propagation to adjacent battery cells (100) due to thermal runaway of the overheated battery cell (100) is highly likely to occur at the upper part (+Z-axis direction) and lower part (-Z-axis direction) of the battery cells (100). In this embodiment, the lower portion (-Z-axis direction) and upper portion (+Z-axis direction) of the battery cells are covered by the first filling member (210) and the second filling member (230) containing the silicone resin, thereby effectively preventing heat propagation that may occur on the upper portion (+Z-axis direction) and lower portion (-Z-axis direction) of the battery cells (100). Furthermore, in this embodiment, the third filling member (250) containing the paraffin resin is filled between the first filling member (210) and the second filling member (230), so that when filling the filling portion (200), the amount of the relatively expensive silicone resin injected can be reduced, thereby securing cost competitiveness.

[0064]

[0065] The battery cell array (10) may include a base plate (300).

[0066] The base plate (300) can support one side (-Z-axis direction) of the plurality of battery cells (100). Specifically, the base plate (300) can support the bottom (-Z-axis direction) of the plurality of battery cells (100).

[0067] The base plate (300) may be provided with at least one venting opening (350) that guides the vent portion (150) of the plurality of battery cells (100). In this embodiment, the vent portion (150) may be provided at the bottom (-Z-axis direction) of the battery cell (100). This vent portion (150) may break or melt in the event of an abnormal situation of the battery cell (100) to release gas (G), etc. inside the battery cell (100) to the outside. That is, in this embodiment, the battery cell (100) may be provided with a bottom vent structure that releases gas (G), etc. to the lower side (-Z-axis direction) of the battery cell (100) in the event of an abnormal situation. Here, an abnormal situation may refer to a thermal event situation caused by overheating of the battery cell (100).

[0068] The above venting opening (350) can expose the vent portion (150) of the battery cells (100) to the bottom of the battery cell array (10) without interfering with the vent portion (150) of the battery cells (100). Accordingly, the gas (G) released during lower venting through the vent portion (150) can flow toward the bottom (-Z-axis direction) of the battery cell array (10) while being guided through the venting opening (350). Meanwhile, the first filling member (210) can be filled into the venting opening (350). The first filling member (210) can protect the bottom (-Z-axis direction) of the battery cells (100), such as by preventing the inflow of foreign substances, etc., toward the vent portion (150) of the battery cells (100) under normal conditions. The first filling member (210) filled within the venting opening (350) may be broken or melted by the gas (G) released from the vent section (150) in the event of an abnormal situation, thereby guiding the gas (G) toward the bottom (-Z-axis direction) of the battery cell array (10).

[0069] The above venting openings (350) may be provided in multiple numbers. The multiple venting openings (350) may be provided at the bottom of the vent portion (150) of each of the multiple battery cells (100). Accordingly, the discharge of gas (G) according to abnormal conditions of all of the multiple battery cells (100) can be effectively guided.

[0070] The battery cell array (10) may include a cooling plate (400).

[0071] The cooling plate (400) is for cooling the plurality of battery cells (100) and may be provided on the upper side (+Z-axis direction) or lower side (-Z-axis direction) of the plurality of battery cells (100). In this embodiment, the cooling plate (400) may be provided on the upper side (+Z-axis direction) of the plurality of battery cells (100). The cooling plate (400) may be formed to have a predetermined length and area for cooling the plurality of battery cells (100). In this way, the cooling plate (400) can be provided on the upper side (+Z-axis direction) or lower side (-Z-axis direction) of the plurality of battery cells (100), or in the case of the present embodiment, on the upper side (+Z-axis direction) of the plurality of battery cells (100), thereby increasing the cooling performance of the battery cells (100) with a simpler structure compared to a structure placed between the sides of the battery cells (100). Furthermore, in the present embodiment, the battery cells (100) can be cooled through the third filling member (250) containing the paraffin resin and the cooling plate (400), thereby further increasing the cooling performance of the battery cells (100).

[0072] In the above cooling plate (400), a filling material injection hole (410) may be formed.

[0073] The above-mentioned filling material injection hole (410) may be provided at both ends of the cooling plate (400). Such filling material injection hole (410) can guide the injection of filling materials (210, 230, 250) of the filling part (200). For example, the filling material injection hole (410) can guide the injection of the second filling material (230).

[0074] The battery cell array (10) may include a busbar unit (500).

[0075] The busbar unit (500) can electrically connect the plurality of battery cells (100). The busbar unit (500) can be electrically connected to the plurality of battery cells (100). In this embodiment, positive and negative electrode structures for electrical connection between the plurality of battery cells (100) and the busbar unit (500) can be provided on the upper side (+Z-axis direction) of the battery cells (100). In this embodiment, since the positive and negative electrode structures for electrical connection are provided on the upper side (+Z-axis direction) of the battery cells (100), interference that may occur during gas (G) venting on the lower side (-Z-axis direction) of the battery cells (100) can be fundamentally prevented. The busbar unit (500) can be completely covered by the filling portion (200). Specifically, the busbar unit (500) can be covered by the second filling member (230).

[0076] The battery cell array (10) may include a side plate (600).

[0077] The side plate (600) forms the side exterior of the battery cell array (10) and can be connected to the base plate (300). The side plate (600) can form the case structure of the battery cell array (10) together with the base plate (300). The side plate (600) can be connected to the base plate (300) as a separate member to form the case structure, or it can be provided as an integral structure with the base plate (300) to form the case structure.

[0078]

[0079] Below, we will examine in more detail the manufacturing process of the battery cell array (10) according to one embodiment of the present invention.

[0080] FIG. 3 is a drawing illustrating the seating of battery cells on a base plate during the manufacturing process of a battery cell array according to one embodiment of the present invention.

[0081] Referring to FIG. 3, when manufacturing the battery cell array (10), a worker, such as a manufacturer, can place the plurality of battery cells (100) on the base plate (300). At this time, the worker can place the plurality of battery cells (100) on the base plate (300) such that the vent portion (150) of the battery cells (100) is positioned above the venting openings (350) of the base plate (300).

[0082] FIGS. 4 and 5 are drawings for explaining the injection of a first filling member of a filling portion during a manufacturing process of a battery cell array according to an embodiment of the present invention.

[0083] Referring to FIGS. 4 and 5, the operator may subsequently inject the first filling member (210) of the filling section (200) into the internal space of the battery cell array (10) formed by the side plate (600) and the base plate (300) through a resin injection device (R). The injection of the first filling member (210) may be performed until the lower portion (-Z-axis direction) of the plurality of battery cells (100), specifically the portion from the bottom of the plurality of battery cells (100) to a predetermined height, and the internal space of the venting opening (350) are filled. Meanwhile, the filling of the first filling member (210) within the internal space of the venting opening (350) may be performed from the bottom side of the base plate (300) for faster filling.

[0084] FIGS. 6 and 7 are drawings for explaining the injection of a third filling member of a filling portion during the manufacturing process of a battery cell array according to an embodiment of the present invention.

[0085] Referring to FIGS. 6 and 7, thereafter, the operator can inject the third filling member (250) of the filling part (200) into the internal space of the battery cell array (10) formed by the side plate (600) and the base plate (300) through the resin injection device (R). The injection of the third filling member (250) can be performed until it is filled between the sides of the plurality of battery cells (100), excluding the upper part (+Z-axis direction) of the plurality of battery cells (100), specifically, the part from the top of the plurality of battery cells (100) up to a predetermined height.

[0086] FIG. 8 is a drawing illustrating the mounting of a busbar unit and a cooling plate during the manufacturing process of a battery cell array according to one embodiment of the present invention.

[0087] Referring to FIG. 8, thereafter, the operator can connect the busbar unit (500) to the plurality of battery cells (100) on the upper side (+Z-axis direction) of the plurality of battery cells (100). Next, the operator can mount the cooling plate (400) on the side plate (600) at a predetermined distance from the busbar unit (500).

[0088] FIG. 9 is a drawing for explaining the injection of a second filling member of a filling part during the manufacturing process of a battery cell array according to one embodiment of the present invention.

[0089] Referring to FIG. 9, thereafter, the operator can inject the second filling member (230) of the filling part (200) into the internal space of the battery cell array (10) formed by the side plate (600) and the base plate (300) through the resin injection device (R). The injection of the second filling member (230) can be performed in the upper part (+Z-axis direction) of the plurality of battery cells (100), specifically, up to a predetermined height from the top of the plurality of battery cells (100), up to a height where both the busbar unit (500) and the cooling plate (400) are submerged.

[0090] In this way, in the present embodiment, through the filling member (200) comprising at least two types of filling members (210, 230, 250), it is possible to secure both thermal runaway prevention and cooling performance for preventing chain ignition with a simpler and simpler structure through a simpler manufacturing process, without structures such as separate cooling tubes provided between the sides of the battery cells (100).

[0091] Accordingly, in one embodiment of the present invention, a battery cell array (10) with a simpler structure can be implemented while increasing manufacturing process efficiency.

[0092]

[0093] FIG. 10 is a drawing for illustrating a battery cell array according to another embodiment of the present invention.

[0094] 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.

[0095] Referring to FIG. 10, the battery cell array (20) may include the plurality of battery cells (100), the filling unit (200), the base plate (300), the busbar unit (500), the cooling plate (405), and the side plate (602).

[0096] Since the plurality of battery cells (100), the filling unit (200), the base plate (300), and the busbar unit (500) are substantially identical or similar to the preceding embodiment, a redundant description is omitted below.

[0097] The cooling plate (405) may be provided with at least one cooling channel (450) through which a cooling medium for cooling the plurality of battery cells (100) flows. 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 through the cooling channel (450) while cooling the battery cells (100).

[0098] A cooling channel through hole (612) may be formed in the above side plate (602).

[0099] The above cooling port through-hole (612) may be provided on one side wall of the side plate (602). This cooling port through-hole (612) may guide the connection between the cooling channel (450) and the external cooling device, etc., by passing the cooling port, which is to be connected to the external cooling device, etc., provided at one end of the cooling channel (450) of the cooling plate (405), out of the battery cell array (20).

[0100] In this way, in the present embodiment, a cooling channel (450) through which the cooling medium flows is provided within the cooling plate (405), thereby further enhancing the cooling performance of the battery cell array (20).

[0101]

[0102] FIG. 11 is a drawing for illustrating a battery cell array according to another embodiment of the present invention.

[0103] Since the battery cell array (30) 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 are omitted, and the following focuses on the differences from the preceding embodiment.

[0104] Referring to FIG. 11, the battery cell array (30) may include the plurality of battery cells (100), the filling unit (200), the base plate (300), the cooling plate (400), the busbar unit (500), and the side plate (605).

[0105] Since the plurality of battery cells (100), the filling unit (200), the base plate (300), the cooling plate (400), and the busbar unit (500) are substantially the same or similar to the preceding embodiment, a redundant description is omitted below.

[0106] The above side plate (605) may include a filling guide (650).

[0107] The above filling guide (650) can guide the injection of the filling members (210, 230, 250) of the above filling member (200).

[0108] The above-mentioned filling guide (650) may include a base guide (652) and a top guide (654).

[0109] The base guide (652) is provided at a predetermined height position on the inner surface of the side plate (605) and may be provided to protrude a predetermined length toward the interior of the side plate (605). The predetermined height of the base guide (652) from the base plate (300) may be a preset filling completion height of the first filling member (210). The preset filling completion height of the first filling member (210) may be a preset filling start height of the third filling member (250).

[0110] The top guide (654) is provided at a predetermined height position on the inner surface of the side plate (605) and may be provided to protrude a predetermined length toward the interior of the side plate (605). This top guide (654) may be provided at a higher position than the base guide (652) inside the battery cell array (10). The predetermined height of the top guide (654) from the base plate (300) may be the preset filling completion height of the third filling member (250). The preset filling completion height of the third filling member (250) may be the preset filling start height of the second filling member (230).

[0111] The protruding length of the top guide (654) may be shorter than the protruding length of the base guide (652). This is to prevent interference with the view of the base guide (652) caused by the top guide (654).

[0112] Below, we will examine in more detail the manufacturing process of the battery cell array (30) according to another embodiment of the present invention.

[0113] FIGS. 12 to 15 are drawings for explaining the manufacturing process of a battery cell array according to another embodiment of the present invention.

[0114] Referring to FIG. 12 and FIG. 13, the operator, such as the manufacturer, can complete the injection of the first filling member (210) by injecting the first filling member (210) into the filling section (200) through the resin injection device (R) up to the height of the base guide (652) of the filling guide (650). Here, the base guide (652) protrudes further than the top guide (654), thereby preventing visual interference caused by the top guide (654).

[0115] Referring to FIGS. 14 and 15, thereafter, the operator, such as a manufacturer, can complete the injection of the third filling member (250) by injecting the third filling member (250) into the filling section (200) through the resin injection device (R) up to the height of the top guide (654) of the filling guide (650). Thereafter, the operator can inject the second filling member (230) after mounting the busbar unit (500) and the cooling plate (400), as in the previous embodiment.

[0116] In this way, in the present embodiment, the filling of the filling members (210, 230, 250) of the filling section (200) can be verified more accurately through the filling guide (650), thereby increasing the filling accuracy of the filling members (210, 230, 250) of the filling section (200).

[0117]

[0118] FIG. 16 is a drawing for explaining a battery pack according to an embodiment of the present invention, and FIG. 17 is a drawing for explaining a vehicle according to an embodiment of the present invention.

[0119] Referring to FIGS. 16 and 17, the battery pack (1) may include at least one battery cell array (10, 20, 30) and a pack case (50) that accommodates the at least one battery cell array (10, 20, 30). The pack case (50) may be mounted on a vehicle (V) described later. Meanwhile, the pack case (50) may also be configured as a chassis of a vehicle described later.

[0120] The above battery pack (1) may include an electric field unit.

[0121] The above electrical unit may include electrical components such as a BMS that controls the battery cell array (10, 20, 30). The above electrical unit may further include components such as a current sensor, a fuse, and a service plug.

[0122] An automobile (V) according to one embodiment of the present invention may include at least one battery pack (1) according to the present invention. Additionally, an automobile (V) according to one embodiment of the present invention may include various other components included in the automobile in addition to the battery pack (1). For example, an automobile (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 electronic control unit (ECU), or other control devices.

[0123] 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).

[0124]

[0125] According to the various embodiments described above, a battery cell array (10, 20, 30) capable of preventing heat propagation and securing cooling performance while improving cost competitiveness, a battery pack (1) including such battery cell array (10, 20, 30), and a vehicle (V) including such battery pack (1) can be provided.

[0126] In addition, according to various embodiments as described above, a battery cell array (10, 20, 30) capable of increasing manufacturing process efficiency, a battery pack (1) including such battery cell array (10, 20, 30), and a vehicle (V) including such battery pack (1) can be provided.

[0127]

[0128] 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.

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