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 application includes a plurality of battery cells, and a filler filled to cover the plurality of battery cells and including at least two types of filler members.

Description

Technical Field

[0001] This application is based on and claims priority to Korean Patent Application No. 10-2025-0011917 filed with the Korean Intellectual Property Office on January 24, 2025, the disclosure of which is incorporated herein by reference in its entirety.

[0002] This disclosure relates to battery cell arrays, battery packs including battery cell arrays, and vehicles including battery packs, and more specifically, to battery cell arrays with improved cost competitiveness and manufacturability, battery packs including battery cell arrays, and vehicles including battery packs. Background Technology

[0003] Secondary batteries, with their wide product portfolio applicability and high energy density, are widely used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) powered by electric sources. These secondary batteries are gaining attention as a new energy source for improving eco-friendliness and energy efficiency because they offer the key advantage of significantly reducing fossil fuel use and produce no byproducts from energy consumption.

[0004] Currently widely used rechargeable batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of a single rechargeable battery cell (i.e., a single battery cell) is approximately 2.5V to 4.5V. Therefore, when a higher output voltage is required, multiple battery cells can be connected in series to form a battery pack. Alternatively, depending on the required charging and discharging capacity of the battery pack, multiple battery cells can be connected in parallel to form a battery pack. Therefore, the number of battery cells included in a battery pack can be set differently depending on the required output voltage or the required charging and discharging capacity.

[0005] Meanwhile, when multiple battery cells are connected in series / parallel to form a battery pack, a battery cell array including at least one battery cell is usually formed first, and other components are added by using at least one battery cell array to form the battery pack.

[0006] Traditional battery cell arrays are configured to include multiple battery cells, multiple cooling pipes disposed between the side surfaces of the battery cells, and a filler member covering the battery cells and the cooling pipes. This conventional battery cell array uses a so-called side-cooling method to cool the battery cells, which ensures cooling performance by providing multiple cooling pipes between the side surfaces of the battery cells. Furthermore, the filler member is typically provided with silicone resin to prevent heat propagation from a battery cell experiencing an malfunction to adjacent battery cells, thereby minimizing the risk of cascading fires.

[0007] However, in the case of conventional battery cell arrays, a large amount of silicone resin is required because the silicone resin used as a filling component constitutes the structure of the entire battery cell array, which includes the battery cells. This leads to an increase in manufacturing costs, thus causing a problem that impairs cost competitiveness.

[0008] Furthermore, in the case of traditional battery cell arrays, multiple cooling pipes must be installed between the side surfaces of the battery cells, which leads to complex manufacturing processes and a high probability of process management problems due to interference or collisions between the cooling pipes and the battery cells.

[0009] Therefore, there is a need to explore a method for providing a battery cell array that can prevent heat propagation and ensure cooling performance while improving cost competitiveness and manufacturing efficiency. Summary of the Invention

[0010] Technical issues

[0011] This disclosure was designed to address problems in the related art, and therefore, this disclosure aims to provide a battery cell array that can prevent heat propagation and ensure cooling performance while improving cost competitiveness, a battery pack including the battery cell array, and a vehicle including the battery pack.

[0012] In addition, this disclosure aims to provide a battery cell array that can improve manufacturing process efficiency, a battery pack including the battery cell array, and a vehicle including the battery pack.

[0013] However, the technical problems to be solved by this disclosure are not limited to those described above, and those skilled in the art can clearly understand other problems not mentioned herein through the following description of this disclosure.

[0014] Technical solution

[0015] To address the aforementioned objective, this disclosure provides a battery cell array comprising: a plurality of battery cells; and a filling portion, the filling portion being filled to cover the plurality of battery cells and comprising at least two filling components.

[0016] Furthermore, preferably, at least one of the at least two filler components may include a potting resin, and at least another of the at least two filler components may include a paraffin resin.

[0017] Furthermore, preferably, the at least two filling members can be filled by stacking them together along the height direction of the plurality of battery cells, and the filling members that are opposite to each other in the height direction can be set as different filling members.

[0018] Furthermore, preferably, the filling portion may include: a first filling member, which is filled to cover one side of the plurality of battery cells; a second filling member, which is filled to cover the other side of the plurality of battery cells; and a third filling member, which is filled between the first filling member and the second filling member to cover the side surface of the plurality of battery cells and has higher cooling performance than the first filling member and the second filling member.

[0019] Furthermore, preferably, the third filler component may include paraffin resin.

[0020] Furthermore, preferably, the first filling member and the second filling member may comprise potting resin.

[0021] Furthermore, preferably, the first filling member and the second filling member may comprise silicone resin (silicone resin).

[0022] Furthermore, preferably, the battery cell array may include a substrate that supports one side of the plurality of battery cells and is provided with at least one exhaust opening for guiding the exhaust portion of the plurality of battery cells.

[0023] Furthermore, preferably, the battery cell array may include a cooling plate having a predetermined length and disposed on top or bottom of the plurality of battery cells for cooling the plurality of battery cells.

[0024] Furthermore, preferably, the battery cell array may include a busbar unit, which is covered by the filling portion and electrically connected to the plurality of battery cells.

[0025] Furthermore, preferably, the cooling plate may be provided with at least one cooling channel through which the cooling medium for cooling the plurality of battery cells flows.

[0026] Furthermore, this disclosure provides a battery pack comprising: at least one battery cell array according to the above embodiments; and a battery pack housing accommodating at least one battery cell array.

[0027] In addition, this disclosure provides a vehicle that includes at least one battery pack according to the above embodiments.

[0028] Beneficial effects

[0029] According to the various embodiments described above, a battery cell array that can prevent heat propagation and ensure cooling performance while improving cost competitiveness, a battery pack including the battery cell array, and a vehicle including the battery pack can be provided.

[0030] In addition, according to the various embodiments described above, a battery cell array capable of improving manufacturing process efficiency, a battery pack including the battery cell array, and a vehicle including the battery pack can be provided.

[0031] Furthermore, various other additional effects can be achieved according to the various embodiments of this disclosure. These various effects of this disclosure will be described in detail in each embodiment, or descriptions of effects that can be readily understood by those skilled in the art will be omitted. Attached Figure Description

[0032] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure is not to be construed as limited to the drawings.

[0033] Figure 1 This is a view used to describe a battery cell array according to an embodiment of the present disclosure.

[0034] Figure 2 This is a view used to describe the lower exhaust of a battery cell array according to an embodiment of the present disclosure.

[0035] Figure 3 This is a view used to describe the placement of battery cells on a substrate during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0036] Figure 4 and Figure 5 This is a view used to describe the first filling member injected into the filling portion during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0037] Figure 6 and Figure 7 This is a view used to describe a third filling member injected into the filling portion during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0038] Figure 8 This is a view used to describe the installation of busbar units and cooling plates during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0039] Figure 9 This is a view used to describe a second filling member injected into the filling portion during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0040] Figure 10 This is a view used to describe a battery cell array according to another embodiment of the present disclosure.

[0041] Figure 11 This is a view used to describe a battery cell array according to yet another embodiment of the present disclosure.

[0042] Figures 12 to 15 This is a view used to describe the manufacturing process of a battery cell array according to another embodiment of the present disclosure.

[0043] Figure 16 This is a view used to describe a battery pack according to an embodiment of the present disclosure.

[0044] Figure 17 This is a view used to describe a vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0045] The preferred embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general and dictionary meaning, but should be interpreted based on the principle that allows the inventors to appropriately define terms for best interpretation, and based on the meanings and concepts corresponding to the technical aspects of this disclosure.

[0046] Therefore, the description presented herein is merely a preferred example for illustrative purposes and is not intended to limit the scope of this disclosure. It should be understood that other equivalents and modifications may be made thereto without departing from the scope of this disclosure.

[0047] Furthermore, the directional terms used herein (such as up, down, left, right, front, and back) are used only for ease of description, and it will be apparent to those skilled in the art that these terms may vary depending on the position of the element or the observer.

[0048] Figure 1 This is a view used to describe a battery cell array according to an embodiment of the present disclosure, and Figure 2 This is a view used to describe the lower exhaust of a battery cell array according to an embodiment of the present disclosure.

[0049] Reference Figure 1 and Figure 2 The battery cell array 10 may include a plurality of battery cells 100 and a filling portion 200.

[0050] The multiple battery cells 100 are secondary batteries and can be configured as cylindrical, pouch-type, or prismatic secondary batteries. In this embodiment, the description is limited to configuring the multiple battery cells 100 as cylindrical secondary batteries.

[0051] The filling portion 200 can be filled to completely cover multiple battery cells 100. The filling portion 200 can be configured to include at least two types of filling members 210, 230, and 250.

[0052] In embodiments of this disclosure, compared to conventional structures in which a single filling member covers multiple battery cells, the filling portion 200 can be composed of various filling members 210, 230, and 250, each optimized for various functions or effects (e.g., heat transfer resistance and cooling performance) required during manufacturing or design. When the filling portion is conventionally composed of a single filling member, the function or effect of the filling portion inevitably leans towards either heat transfer resistance or cooling performance. Furthermore, even if a single filling member is configured to cover various functions, such as heat transfer resistance and cooling performance, it is not easy to meet the condition of simultaneously requiring both heat transfer resistance and cooling performance due to the characteristics of a single filling member.

[0053] In embodiments of this disclosure, the filling portion 200 may consist of various filling components 210, 230, 250 optimized for each of the various functions or effects required during the design phase, thereby enabling all the various functions or effects required during the design phase to be optimally achieved.

[0054] Specifically, at least one of the at least two filler members 210, 230, 250 may include a potting resin, and at least another filler member 250 may include a paraffin resin. According to embodiments of this disclosure, heat transfer resistance can be maximized by using filler members 210, 230 including potting resin, and cooling performance can be maximized by using filler member 250 including paraffin resin.

[0055] At least two types of filling members 210, 230, and 250 can be filled by stacking them on top of each other along the height direction (Z-axis direction) of the plurality of battery cells 100. At least two types of filling members 210, 230, and 250 can be filled by completely covering the plurality of battery cells 100 while being stacked on top of each other. Filling members 210, 230, and 250 that are opposite to each other in the height direction (Z-axis direction) can be configured as different filling members 210, 230, and 250.

[0056] The filling section 200 of this disclosure will be described in more detail below.

[0057] The filling part 200 may include a first filling member 210, a second filling member 230 and a third filling member 250.

[0058] 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 end (-Z-axis direction) of the plurality of battery cells 100.

[0059] 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 end (+Z axis direction) of the plurality of battery cells 100.

[0060] The third filler member 250 can be filled between the first filler member 210 and the second filler member 230 to cover the side surfaces of the plurality of battery cells 100. The third filler member 250 can have higher cooling performance than the first filler member 210 and the second filler member 230. With the third filler member 250 having such cooling performance, the cooling performance of the battery cells 100 can be ensured without the need to separately provide multiple cooling pipes between the plurality of battery cells 100.

[0061] Specifically, the third filler component 250 may include paraffin resin. The paraffin resin may include paraffin material. Paraffin resin including paraffin material can increase heat capacity, exist as a solid in a temperature range below a predetermined temperature, and change to a liquid phase in a temperature range above the predetermined temperature while improving the cooling performance of the battery cell 100 through the latent heat of phase change. The predetermined temperature may be approximately 40°C.

[0062] In this embodiment, the battery cell 100 can be effectively cooled by paraffin resin without the need to install multiple cooling pipes between the side surfaces of the battery cell 100. Furthermore, in this embodiment, the multiple cooling pipes between the side surfaces of the battery cell 100 can be omitted, thereby solving process management problems such as interference or collision with the battery cell caused by the conventional installation of multiple cooling pipes. Moreover, in this embodiment, by omitting multiple cooling pipes, the manufacturing process of the battery cell array 10 can be further simplified. And, in this embodiment, by omitting multiple cooling pipes, a battery cell array 10 with a simpler structure can be provided, thereby increasing design freedom while ensuring the ease of design of the battery cell array 10.

[0063] The first filler member 210 and the second filler member 230 may include a potting resin. The potting resin may include a material with high heat resistance. Therefore, when a thermal event occurs due to overheating or the like in at least one particular battery cell 100 among the plurality of battery cells 100, the first filler member 210 and the second filler member 230 can effectively prevent heat from spreading to adjacent battery cells 100.

[0064] Specifically, the first filler member 210 and the second filler member 230 may include silicone resin. Because silicone resin has high heat resistance, it can more effectively prevent heat propagation to adjacent battery cells 100 during a thermal event. When a thermal event occurs, heat propagation to adjacent battery cells 100 due to thermal runaway of an overheated battery cell 100 is likely to occur at the upper end (+Z-axis direction) and lower end (-Z-axis direction) of the battery cell 100. In this embodiment, the lower end (-Z-axis direction) and upper end (+Z-axis direction) of the battery cell can be covered by the first filler member 210 and the second filler member 230, which include silicone resin, thereby effectively preventing heat propagation that may occur at the upper end (+Z-axis direction) and lower end (-Z-axis direction) of the battery cell 100. Furthermore, in this embodiment, a third filler member 250, comprising paraffin resin, is filled between the first filler member 210 and the second filler member 230. Therefore, when filling this filler portion 200, the amount of more expensive silicone resin injected can be reduced, thereby ensuring cost competitiveness.

[0065] The battery cell array 10 may include a substrate 300.

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

[0067] The substrate 300 may be provided with at least one vent opening 350 for guiding venting portions 150 of multiple battery cells 100. In this embodiment, the venting portion 150 may be provided at the bottom (-Z-axis direction) of the battery cell 100. This venting portion 150 may rupture or melt in abnormal circumstances of the battery cell 100 to release gases such as G inside the battery cell 100 to the outside. That is, in this embodiment, the battery cell 100 may be provided with a lower venting structure that releases gases such as G to the lower side (-Z-axis direction) of the battery cell 100 in abnormal circumstances. Here, abnormal circumstances may refer to thermal events caused by overheating of the battery cell 100, etc.

[0068] The vent opening 350 exposes the vent portion 150 of the battery cell 100 to the bottom of the battery cell array 10 without interfering with the vent portion 150 of the battery cell 100. Therefore, the gas G released through the vent portion 150 during lower venting can flow towards the bottom side (-Z-axis direction) of the battery cell array 10 while being guided through the vent opening 350. Simultaneously, a first filling member 210 can be filled into the vent opening 350. The first filling member 210 can protect the bottom (-Z-axis direction) of the battery cell 100, such as preventing foreign objects from flowing towards the vent portion 150 of the battery cell 100 under normal conditions. The first filling member 210 filled in the vent opening 350 can be destroyed or melted by the gas G released to the outside of the vent portion 150 under abnormal conditions, thereby guiding the gas G towards the bottom (-Z-axis direction) of the battery cell array 10.

[0069] Multiple exhaust openings 350 can be provided. These multiple exhaust openings 350 can be located below the exhaust section 150 of each of the multiple battery cells 100. Therefore, the emission of gas G caused by abnormal conditions from all the multiple battery cells 100 can be effectively guided.

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

[0071] A cooling plate 400 is used to cool multiple battery cells 100 and can be disposed on the top (+Z-axis direction) or bottom (-Z-axis direction) of the multiple battery cells 100. In this embodiment, the cooling plate 400 can be disposed on the top (+Z-axis direction) of the multiple battery cells 100. The cooling plate 400 can be formed to have a predetermined length and area for cooling the multiple battery cells 100. In this way, the cooling plate 400 can be disposed on the top (+Z-axis direction) or bottom (-Z-axis direction) of the multiple battery cells 100, and in this embodiment, the cooling plate 400 is disposed on the top (+Z-axis direction) of the multiple battery cells 100, thereby improving the cooling performance of the battery cells 100 with a simpler structure compared to a structure disposed between the side surfaces of the battery cells 100. Furthermore, in this embodiment, the battery cells 100 can be cooled by a third filler member 250 including paraffin resin and the cooling plate 400, thereby further improving the cooling performance of the battery cells 100.

[0072] Filler injection holes 410 can be formed in the cooling plate 400.

[0073] The filler injection holes 410 can be provided at both ends of the cooling plate 400. The filler injection holes 410 can guide the injection of filler members 210, 230, and 250 from the filling section 200. For example, the filler injection holes 410 can guide the injection of the second filler member 230.

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

[0075] The busbar unit 500 can electrically connect multiple battery cells 100. In this embodiment, both the positive and negative electrode structures for the electrical connection between the multiple battery cells 100 and the busbar unit 500 can be provided on the top (+Z-axis direction) of the battery cells 100. In this embodiment, since both the positive and negative electrode structures for the electrical connection are provided on the top (+Z-axis direction) of the battery cells 100, interference that may occur during gas G emission at the bottom (-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 outer side of the battery cell array 10 and can be connected to the substrate 300. The side plate 600 can form the housing structure of the battery cell array 10 together with the substrate 300. The side plate 600 can be connected to the substrate 300 as a separate component to form the housing structure, or it can be integrated with the substrate 300 to form the housing structure.

[0078] The manufacturing process of the battery cell array 10 according to embodiments of the present disclosure will be described in more detail below.

[0079] Figure 3 This is a view used to describe the placement of battery cells on a substrate during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0080] Reference Figure 3 When manufacturing the battery cell array 10, a worker, such as a manufacturer, can place multiple battery cells 100 on the substrate 300. At this time, the worker can place multiple battery cells 100 on the substrate 300 such that the exhaust portion 150 of the battery cell 100 is positioned above the exhaust opening 350 of the substrate 300.

[0081] Figure 4 and Figure 5 This is a view used to describe the first filling member injected into the filling portion during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0082] Reference Figure 4 and Figure 5The worker can then inject the first filling member 210 of the filling portion 200 into the internal space of the battery cell array 10 formed by the side plate 600 and the substrate 300 using the resin injection device R. The injection of the first filling member 210 can be performed until the lower ends (-Z-axis direction) of the plurality of battery cells 100 (specifically, the portion from the lower ends of the plurality of battery cells 100 to a predetermined height) are covered by the first filling member 210 and the internal space of the venting opening 350 is filled. Simultaneously, the filling of the first filling member 210 within the internal space of the venting opening 350 can be performed at the bottom side of the substrate 300 for faster filling.

[0083] Figure 6 and Figure 7 This is a view used to describe a third filling member injected into the filling portion during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0084] Reference Figure 6 and Figure 7 The worker can then inject the third filling member 250 of the filling portion 200 into the internal space of the battery cell array 10 formed by the side plate 600 and the substrate 300 using the resin injection device R. The injection of the third filling member 250 can be performed until the third filling member 250 fills the space between the side surfaces of the plurality of battery cells 100 except for the upper ends (+Z axis direction) of the plurality of battery cells 100 (specifically, the portion from the upper ends of the plurality of battery cells 100 to a predetermined height).

[0085] Figure 8 This is a view used to describe the installation of busbar units and cooling plates during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0086] refer to Figure 8 The worker can then connect the busbar unit 500 to the multiple battery cells 100 on top (in the +Z axis direction). Next, the worker can install the cooling plate 400 on the side plate 600 at a predetermined distance from the busbar unit 500.

[0087] Figure 9 This is a view used to describe a second filling member injected into the filling portion during the manufacturing process of a battery cell array according to an embodiment of the present disclosure.

[0088] Reference Figure 9The worker can then inject the second filling member 230 of the filling portion 200 into the internal space of the battery cell array 10 formed by the side plate 600 and the substrate 300 using the resin injection device R. The injection of the second filling member 230 can be performed on the upper ends (+Z axis direction) of the plurality of battery cells 100, specifically, on the portion from the upper ends of the plurality of battery cells 100 to a predetermined height, up to the height where the busbar unit 500 and the cooling plate 400 are submerged.

[0089] In this way, in this embodiment, by using a filling portion 200 comprising at least two filling members 210, 230, 250, cooling performance and thermal runaway prevention against chain fires can be ensured simultaneously through a simpler manufacturing process and a simpler and more streamlined structure, without the need for structures such as separate cooling pipes between the side surfaces of the battery cell 100.

[0090] Therefore, in the embodiments of this disclosure, a battery cell array 10 with a simpler and more streamlined structure can be achieved, while improving manufacturing process efficiency.

[0091] Figure 10 This is a view used to describe a battery cell array according to another embodiment of the present disclosure.

[0092] Since the battery cell array 20 according to this embodiment is similar to the battery cell array 10 of the aforementioned embodiment, redundant descriptions of configurations that are substantially the same or similar to those in the aforementioned embodiments are omitted, and the following description focuses on the differences from the aforementioned embodiments.

[0093] Reference Figure 10 The battery cell array 20 may include multiple battery cells 100, filling portion 200, substrate 300, busbar unit 500, cooling plate 405 and side plate 602.

[0094] Since the multiple battery cells 100, filling portions 200, substrates 300 and busbar units 500 are substantially the same as or similar to those in the aforementioned embodiments, redundant descriptions are omitted below.

[0095] The cooling plate 405 may be provided with at least one cooling channel 450 through which a cooling medium flows to cool multiple battery cells 100. The cooling medium may be cooling water. However, the cooling medium is not limited to this; other cooling fluids capable of circulating through the cooling channel 450 and simultaneously cooling the battery cells 100 may also be used.

[0096] Cooling port through hole 612 can be formed in side plate 602.

[0097] The cooling port through hole 612 can be provided on one side wall of the side plate 602. The cooling port through hole 612 can guide the connection between the cooling channel 450 and the external cooling device, etc., by allowing the cooling port provided at one end of the cooling channel 450 of the cooling plate 405 for connection with the external cooling device, etc., to the outside of the battery cell array 20.

[0098] Thus, in this embodiment, a cooling channel 450 for the cooling medium to flow through is provided in the cooling plate 405, thereby further improving the cooling performance of the battery cell array 20.

[0099] Figure 11 This is a view used to describe a battery cell array according to yet another embodiment of the present disclosure.

[0100] Since the battery cell array 30 according to this embodiment is similar to the battery cell array 10 of the aforementioned embodiment, redundant descriptions of configurations that are substantially the same or similar to those in the aforementioned embodiments are omitted, and the following description focuses on the differences from the aforementioned embodiments.

[0101] Reference Figure 11 The battery cell array 30 may include multiple battery cells 100, filling portion 200, substrate 300, cooling plate 400, busbar unit 500 and side plate 605.

[0102] Since the multiple battery cells 100, filling portions 200, substrates 300, cooling plates 400, and busbar units 500 are substantially the same as or similar to those in the aforementioned embodiments, redundant descriptions are omitted below.

[0103] Side panel 605 may include filling guide 650.

[0104] The filling guide 650 can guide the injection of filling members 210, 230, and 250 of the filling section 200.

[0105] The filling guide 650 may include a base guide 652 and a top guide 654.

[0106] The base guide 652 is disposed at a predetermined height on the inner surface of the side plate 605, and can be configured to protrude a predetermined length toward the interior of the side plate 605. The predetermined height of the base guide 652 from the substrate 300 can be the preset filling completion height of the first filling member 210. The preset filling completion height of the first filling member 210 can be the preset filling start height of the third filling member 250.

[0107] The top guide 654 is disposed at a predetermined height on the inner surface of the side plate 605 and can be configured to protrude a predetermined length toward the interior of the side plate 605. The top guide 654 can be disposed within the battery cell array 10 at a position higher than the base guide 652. The predetermined height of the top guide 654 from the substrate 300 can be the preset filling completion height of the third filling member 250. The preset filling completion height of the third filling member 250 can be the preset filling start height of the second filling member 230.

[0108] The protruding length of the top guide 654 may be shorter than the protruding length of the base guide 652. This is to prevent visual interference from the top guide 654 to the base guide 652.

[0109] The manufacturing process of the battery cell array 30 according to another embodiment of the present disclosure will be described in more detail below.

[0110] Figures 12 to 15 This is a view used to describe the manufacturing process of a battery cell array according to another embodiment of the present disclosure.

[0111] Reference Figure 12 and Figure 13 When the first filler member 210 of the filler portion 200 is injected through the resin injection device R, a worker, such as a manufacturer, can complete the injection of the first filler member 210 by injecting it up to the height of the base guide 652 of the filler guide 650. Here, the base guide 652 protrudes longer than the top guide 654, and thus visual interference caused by the top guide 654 can be prevented.

[0112] Reference Figure 14 and Figure 15 When the third filler member 250 of the filling section 200 is injected through the resin injection device R, a worker, such as a manufacturer, can then complete the injection of the third filler member 250 by injecting it up to the height of the top guide 654 of the filling guide 650. Next, as in the aforementioned embodiment, the worker can inject the second filler member 230 after installing the busbar unit 500 and the cooling plate 400.

[0113] Thus, in this embodiment, the filling of the filling members 210, 230, and 250 of the filling section 200 can be verified more accurately by the filling guide 650, thereby further improving the filling accuracy of the filling members 210, 230, and 250 of the filling section 200.

[0114] Figure 16 This is a view used to describe a battery pack according to an embodiment of the present disclosure, and Figure 17This is a view used to describe a vehicle according to an embodiment of the present disclosure.

[0115] refer to Figure 16 and Figure 17 The battery pack 1 may include at least one array of battery cells 10, 20, 30 and a battery pack housing 50 that houses the at least one array of battery cells 10, 20, 30. The battery pack housing 50 may be mounted on a vehicle V, which will be described later. The battery pack housing 50 may also be configured as the chassis of the vehicle, which will be described later.

[0116] Battery pack 1 may include electrical units.

[0117] The electrical unit may include electrical components, such as a BMS that controls the battery cell arrays 10, 20, and 30. The electrical unit may also include components such as current sensors, fuses, and maintenance plugs.

[0118] A vehicle V according to an embodiment of the present disclosure may include one or more battery packs 1 according to the present disclosure. Furthermore, in addition to the battery packs 1, a vehicle V according to an embodiment of the present disclosure may also include various other components included in a vehicle. For example, in addition to the battery packs 1 according to an embodiment of the present disclosure, a vehicle V according to an embodiment of the present disclosure may also include a body, a motor, and control devices (e.g., an electronic control unit (ECU)).

[0119] In addition, of course, besides the vehicle V, the battery pack 1 according to the embodiments of this disclosure can also be installed in other devices, instruments and facilities, such as energy storage systems using secondary batteries.

[0120] According to the various embodiments described above, it is possible to provide battery cell arrays 10, 20, and 30 that can prevent heat propagation and ensure cooling performance while improving cost competitiveness, battery pack 1 including battery cell arrays 10, 20, and 30, and vehicle V including battery pack 1.

[0121] In addition, according to the various embodiments described above, battery cell arrays 10, 20, and 30, battery pack 1 including battery cell arrays 10, 20, and 30, and vehicle V including battery pack 1 can be provided, which can improve the efficiency of the manufacturing process.

[0122] The present disclosure has been described above with respect to a limited number of embodiments and accompanying drawings, but the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes can be made to these embodiments within the technical aspects of the present disclosure and within the equivalent scope of the appended claims.

Claims

1. A battery cell array, the battery cell array comprising: Multiple battery cells; as well as A filling portion, which is filled to cover the plurality of battery cells and includes at least two types of filling components.

2. The battery cell array according to claim 1, in, At least one of the at least two filling components includes a potting resin, and Wherein, at least one of the at least two filling components comprises paraffin resin.

3. The battery cell array according to claim 1, in, The at least two types of filling members are filled in such a way that they are stacked on top of each other along the height direction of the plurality of battery cells, and The filling members that are opposite to each other in the height direction are configured as different filling members.

4. The battery cell array according to claim 1, The filling portion includes: A first filling member is filled to cover one side of the plurality of battery cells; A second filling member is filled to cover the other side of the plurality of battery cells; as well as A third filling member is filled between the first filling member and the second filling member to cover the side surfaces of the plurality of battery cells and has higher cooling performance than the first filling member and the second filling member.

5. The battery cell array according to claim 4, in, The third filler component comprises paraffin resin.

6. The battery cell array according to claim 4, in, The first filling member and the second filling member comprise potting resin.

7. The battery cell array according to claim 4, in, The first filling member and the second filling member comprise silicone resin.

8. The battery cell array according to claim 1, wherein the battery cell array comprises: A substrate, the substrate supporting one side of the plurality of battery cells and having at least one exhaust opening for guiding the exhaust portion of the plurality of battery cells.

9. The battery cell array according to claim 1, wherein the battery cell array comprises: A cooling plate having a predetermined length is disposed on top or bottom of the plurality of battery cells for cooling the plurality of battery cells.

10. The battery cell array according to claim 1, wherein the battery cell array comprises: A busbar unit, which is covered by the filling portion and electrically connected to the plurality of battery cells.

11. The battery cell array according to claim 9, in, The cooling plate has at least one cooling channel through which the cooling medium for cooling the plurality of battery cells flows.

12. A battery pack, the battery pack comprising: At least one battery cell array, said battery cell array being a battery cell array according to any one of claims 1 to 11; as well as A battery pack housing that accommodates the at least one array of battery cells.

13. A vehicle comprising at least one battery pack according to claim 12.

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