Battery module, battery pack and vehicle including the same

Abstract

A battery module, a battery pack, and an automobile including the same according to one embodiment of the present invention may include a plurality of battery cells including a plurality of electrode leads, an alignment unit having a plurality of first slots formed such that the electrode leads of the plurality of battery cells are each inserted through and aligned, and a connection unit that is mechanically connected to the alignment unit and electrically connects the electrode leads aligned by the alignment unit by mechanically connecting them.

Description

Technology Field

[0001] The invention relates to a battery module, a battery pack including the same, and an automobile, and more specifically, to a battery module having an improved structure for aligning and electrically connecting the electrode leads of a battery cell, a battery pack including the same, and an automobile. Background Technology

[0002] Secondary batteries, which possess electrical characteristics such as high energy density and high applicability across product categories, are widely applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric sources.

[0003] These secondary batteries are attracting attention as a new energy source for improving eco-friendliness and energy efficiency, not only for the primary advantage of being able to drastically reduce the use of fossil fuels, but also because they do not generate any by-products from the use of energy.

[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. When a high output voltage is required, multiple battery cells are connected in series to form a battery module or battery pack. Additionally, to increase charge / discharge capacity, multiple battery cells are connected in parallel to form a battery module or battery pack. Therefore, the number of battery cells included in the battery module or pack can be varied depending on the required output voltage or charge / discharge capacity.

[0005] Generally, a battery pack includes a battery module composed of multiple battery cells, and it is necessary to ensure stability and durability during the process of electrically connecting the electrode leads of individual battery cells in series and / or parallel.

[0006] In conventional battery modules, a method of welding electrode leads to busbars or similar structures is primarily used to electrically connect the electrode leads. However, the welding method has the following problems. First, the heat generated during the welding process can damage injection-molded parts, such as busbar frames, potentially causing deformation. Additionally, separate additional parts are required for welding, and the process can become complex. Furthermore, if the electrode leads are pressed or bent during welding, there is a possibility of safety issues, such as short circuits.

[0007] To solve these problems, the present invention proposes a battery module capable of electrically connecting electrode leads without welding, a battery pack including the same, and an automobile. The problem to be solved

[0008] The present invention was conceived in consideration of the aforementioned problems, and the problem to be solved by the present invention is to provide a battery module capable of efficiently performing electrical connection between electrode leads through alignment and grouping of electrode leads, a battery pack including the same, and an automobile.

[0009] Another problem that the present invention aims to solve is to provide a battery module with improved durability of electrode leads, a battery pack including the same, and an automobile, which simplifies the assembly process required for electrical connection between electrode leads.

[0010] Another problem that the present invention aims to solve is to provide a battery module that minimizes the risk of electrical short circuits by preventing physical deformation (bending, pressing, etc.) of the electrode leads, a battery pack including the same, and a vehicle.

[0011] 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. means of solving the problem

[0012] A battery module according to an embodiment of the present invention for solving the above-mentioned problem may include a plurality of battery cells comprising a plurality of electrode leads, an alignment unit having a plurality of first slots formed such that the electrode leads of the plurality of battery cells are each inserted through and aligned, and a connection unit that is mechanically connected to the alignment unit and electrically connects the electrode leads aligned by the alignment unit by mechanically connecting them.

[0013] Additionally, the battery cell may include one or more lead groups in which at least some of the plurality of electrode leads are grouped into a predetermined number, and the connection unit may include a plurality of second slots provided corresponding to each of the lead groups.

[0014] In addition, the alignment unit and the connection unit of the battery module according to one embodiment of the present invention may further include a bus bar formed of a conductor, which is formed of an insulator and is disposed in each of the second slots.

[0015] Additionally, the bus bar may include a third slot formed at a position corresponding to the second slot with a shape corresponding to the second slot.

[0016] In addition, the width of the third slot may be configured to be equal to the thickness of the lead group.

[0017] Additionally, the first slots may be provided in a cut shape with one side closed and the other side open, and the second slots may be provided in a cut shape with one side open and the other side closed.

[0018] Additionally, the alignment unit may include a first extension portion that is extended from one side where the first slots are closed and comes into surface contact with one area of ​​the connection unit.

[0019] Additionally, the connecting unit further includes a first protrusion formed in an area where the first extension is in surface contact, and the alignment unit may further include a first groove provided in the first extension and formed to be fitted and coupled with the first protrusion.

[0020] Additionally, the connecting unit may include a second extension formed extending from one side where the second slots are closed and in surface contact with one area of ​​the alignment unit.

[0021] Additionally, the alignment unit may further include a second protrusion formed in an area where the second extension is in surface contact, and the connecting unit may further include a second groove provided in the second extension and formed to be fitted and coupled with the second protrusion.

[0022] Additionally, the alignment unit may include a plurality of first insertion parts inserted into at least some of the second slots.

[0023] Additionally, the above-mentioned connecting unit may include a plurality of second insertion parts inserted into at least some of the first slots.

[0024] A battery pack according to one embodiment of the present invention may include the aforementioned battery module.

[0025] An automobile according to one embodiment of the present invention may include the battery module or battery pack. Effects of the invention

[0026] A battery module according to various embodiments of the present invention, a battery pack including the same, and a vehicle can improve the alignment accuracy of electrode leads and increase the stability of the electrical connection by aligning and mechanically connecting the electrode leads to electrically connect them.

[0027] In addition, according to various embodiments of the present invention, a battery module, a battery pack including the same, and an automobile, the manufacturing process can be simplified, and assembly time can be shortened and production costs reduced.

[0028] In addition, the battery module according to various embodiments of the present invention, the battery pack including the same, and the automobile may have improved durability in an environment where external shocks or vibrations occur.

[0029] The effects of the embodiments are not limited to the effects described above, and unmentioned effects will be clearly understood by those skilled in the art from this specification and the accompanying drawings. Brief explanation of the drawing

[0030] 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. FIG. 1 is an exploded perspective view of a battery module according to one embodiment of the present invention. FIG. 2 is an enlarged perspective view illustrating the state in which a battery cell and an alignment unit of a battery module according to one embodiment of the present invention are being aligned. FIG. 3 is an enlarged perspective view illustrating the state in which a battery cell and an alignment unit of a battery module are aligned according to one embodiment of the present invention. FIG. 4 is an enlarged perspective view illustrating the state in which a battery cell and a connection unit of a battery module according to one embodiment of the present invention are aligned. FIG. 5 is an enlarged perspective view illustrating the state in which the battery cell and the connection unit of a battery module according to one embodiment of the present invention are aligned. FIG. 6 is a cross-sectional view of a battery cell and a busbar frame of a battery module according to one embodiment of the present invention. FIG. 7 is a plan view of a connection unit of a battery module according to one embodiment of the present invention. FIG. 8 is an exploded perspective view for explaining a busbar frame according to one embodiment of the present invention. FIG. 9 is an exploded perspective view for explaining a busbar frame of a battery module according to one embodiment of the present invention. FIG. 10 is an exploded perspective view for explaining a busbar frame of a battery module according to one embodiment of the present invention. FIG. 11 is an exploded perspective view illustrating a busbar frame of a battery module according to one embodiment of the present invention. FIG. 12 is a drawing for explaining a battery pack including a battery module according to one embodiment of the present invention. FIG. 13 is a drawing for explaining a vehicle including a battery pack according to one embodiment of the present invention. Specific details for implementing the invention

[0031] 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.

[0032] 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.

[0033] In addition, the present invention includes various embodiments. For each embodiment, redundant descriptions of substantially identical or similar configurations are omitted, and the focus is on the differences.

[0034] Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be assigned to identical components in different embodiments.

[0035] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0036] In addition, where it is stated that one component is "connected" or "combined" to another component, it should be understood that while the components may be directly connected or combined with each other, another component may be "interposed" between each component, or each component may be "connected" or "combined" through another component.

[0037] Singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "composed of" or "comprising" should not be interpreted as necessarily including all of the various components or steps described in the specification, and should be interpreted as meaning that some of the components or steps may be omitted or additional components or steps may be included.

[0038] Throughout the specification, when "A and / or B" is used, it may mean A, B, or A and B unless specifically stated otherwise.

[0039] 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 it is obvious to those skilled in the art to which this invention pertains that they may vary depending on the position or arrangement, rotation, or position of the observer of the object in question.

[0040] In this specification, unless otherwise specified, the X-axis direction is referred to as the lateral direction (horizontal direction), and the Z-axis direction orthogonal to the XY plane is referred to as the vertical direction (vertical direction).

[0041] Hereinafter, a battery module, a battery pack, and an automobile including the same according to embodiments of the present invention will be described in detail with reference to FIGS. 1 to 13.

[0042] FIG. 1 is an exploded perspective view of a battery module according to an embodiment of the present invention. FIG. 2 is an enlarged perspective view showing the state in which a battery cell and an alignment unit of a battery module according to an embodiment of the present invention are being aligned. FIG. 3 is an enlarged perspective view showing the state in which a battery cell and an alignment unit of a battery module according to an embodiment of the present invention are aligned.

[0043] For convenience of explanation, the components that can be included in the battery module (1) are shown separately in FIG. 1, but when each of the shown components is assembled, they can become one battery module (1).

[0044] Referring to FIG. 1, a battery module (1) according to one embodiment of the present invention may include a battery cell (100) and a busbar frame (200). The battery module (1) may further include a module case (300).

[0045] The type or shape of the battery cell (100) that may be included in the battery module (1) of the present invention is not limited. For example, the battery cell (100) may be a pouch-type secondary battery. As another example, the battery cell (100) may be a plate-type battery cell, and a cylindrical battery cell or a prismatic battery cell may also be applied to the present invention.

[0046] The battery cell (100) may include an electrode lead (110) and a cell case (120).

[0047] The electrode lead (110) is connected to an electrode assembly inside the cell case (120) and can be drawn out to the outside of the cell case (120) to function as a terminal electrically connected to other external components. The electrode lead (110) may include a positive lead (111a) and a negative lead (111b) (see FIG. 2). The positive lead (111a) may be made of aluminum (Al) and the negative lead (111b) may be made of copper (Cu), but is not limited thereto.

[0048] The cell case (120) can accommodate components for producing power, such as an electrode assembly.

[0049] The busbar frame (200) is a configuration for electrically connecting a plurality of electrode leads (110). Specifically, the battery cells (100) can be connected in series or in parallel according to the design of the battery module (1). To this end, a plurality of electrode leads (110) can also be electrically connected to each other according to the design of the battery module (1), and such electrical connection of the electrode leads (110) can be achieved by the busbar frame (200).

[0050] In embodiments of the present invention, the number of busbar frames (200) is not limited. For example, referring to FIG. 1, electrode leads (110) may be drawn out to each side of the battery cell (100), and in this case, a total of two busbar frames (200) may also be provided and placed on each side of the battery cell (100). As another example, depending on the design, only one electrode lead (110) and a busbar frame (200) may be placed on one side of the battery cell (100). In addition, electrode leads (110) and busbar frames (200) may be arranged in various ways as needed and are not particularly limited.

[0051] Meanwhile, in the present specification, the embodiment described with reference to drawings illustrating a single busbar frame (200) is not limited to including only one busbar frame (200), and the number of busbar frames (200) that can be included in the battery module (1) according to the embodiments of the present invention is not particularly limited.

[0052] Among the busbar frames (200) shown in FIG. 1, the busbar frame (200) positioned in the -Y axis direction is shown with its components separated for convenience of explanation, and the busbar frame (200) positioned in the +Y axis direction is shown with its components assembled. Below, the busbar frame (200) will be described based on the separated busbar frame (200) positioned in the -Y axis direction.

[0053] The busbar frame (200) may include an alignment unit (210) and a connection unit (220).

[0054] The alignment unit (210) may include a plurality of first slots (211). A plurality of electrode leads (110) of a plurality of battery cells (100) may be inserted through each of the first slots (211) and aligned. Based on FIG. 1, when the alignment unit (210) is moved in the +Y-axis direction, a plurality of electrode leads (110) may be inserted through each of the first slots (211) and aligned.

[0055] The width of each first slot (211) can be formed such that the electrode lead (110) can be inserted and firmly fixed. A plurality of first slots (211) can be arranged at uniform intervals. According to this configuration, the electrode leads (110) inserted through the first slots (211) can also be aligned at regular intervals.

[0056] Referring further to FIGS. 2 and FIGS. 3, FIG. 2 shows a separated state before the electrode leads (110) of a battery cell (100) are aligned with the alignment unit (210), and FIG. 3 shows a state where the electrode leads (110) are inserted through the alignment unit (210) and aligned. In the state of FIG. 2, if the alignment unit (210) is moved upward (+Z-axis direction) or the electrode leads (110) are moved downward (-Z-axis direction), the electrode leads (110) can be inserted through the alignment unit (210) and aligned as shown in FIG. 3.

[0057] The connecting unit (220) can be mechanically connected to the alignment unit (210). Specifically, referring again to FIG. 1, the connecting unit (220) can be mechanically connected to the alignment unit (210) when it moves in the +Y-axis direction.

[0058] The connecting unit (220), which is mechanically connected to the alignment unit (210), can perform the function of electrically connecting the electrode leads (110) aligned by the alignment unit (210) by mechanically connecting them. The connecting unit (220) may further include components for electrically connecting the electrode leads (110).

[0059] A detailed description of the mechanical fastening method between the alignment unit (210) and the connection unit (220), and the electrical connection method and structure of the electrode lead (110) by the connection unit (220), will be described later with reference to other drawings.

[0060] Meanwhile, the module case (300) may include a plurality of plates and may have an internal receiving space formed therein. Components of the battery module (1), such as a battery cell (100) and a busbar frame (200), may be received in the internal space of the module case (300). By receiving components such as the battery cell (100) and the busbar frame (200) in the module case (300), the battery module (1) can be protected from the external environment.

[0061] A battery module (1) according to one embodiment of the present invention provides advantages due to improvements in the manufacturing process and advantages due to the mechanical connection structure.

[0062] First, the advantages of the manufacturing process of the battery module (1) according to one embodiment of the present invention are as follows.

[0063] Since the electrical connection between the electrode leads (110) of a battery module (1) according to one embodiment of the present invention can be made mechanically, separate welding is not required to electrically connect the electrode leads (110). Therefore, since there is no possibility of thermal deformation or structural damage occurring to components such as the electrode leads (110) or the busbar frame (200) due to the high temperature generated during welding in the manufacturing process of the battery module (1), the durability of the battery module (1) can be improved.

[0064] In addition, the assembly time required for the welding process in the manufacturing process of the battery module (1) is shortened, and since no separate welding equipment is required, the manufacturing time and manufacturing cost of the battery module (1) can be reduced. Furthermore, the manufacturing process of the battery module (1) can be simplified, and maintenance of the manufacturing equipment can be made easier.

[0065] And, the advantages according to the mechanical connection structure of the battery module (1) according to one embodiment of the present invention are as follows.

[0066] According to a battery module (1) of one embodiment of the present invention, electrode leads (110) can be aligned through a first slot (211) of an alignment unit (210), and the aligned electrode leads (110) can be electrically connected by being mechanically connected by a connection unit (220). An electrical connection structure by mechanical connection of these electrode leads (110) can provide the effect of increasing the stability of the electrical connection and improving resistance to vibration and shock compared to a method of electrically connecting electrode leads (110) by individually welding them to a busbar.

[0067] Specifically, the electrode leads (110) are aligned at regular intervals by the first slots (211) of the alignment unit (210) and then mechanically connected by the connecting unit (220), so they can be stably placed in a more accurate position during the assembly process, and mechanical / electrical connection through the connecting unit (220) can also be made more stably.

[0068] FIG. 4 is an enlarged perspective view illustrating the state in which a battery cell and a connecting unit of a battery module according to an embodiment of the present invention are aligned. FIG. 5 is an enlarged perspective view illustrating the state in which a battery cell and a connecting unit of a battery module according to an embodiment of the present invention are aligned.

[0069] Hereinafter, with reference to FIGS. 4 and 5, the configuration, structure, and mechanical / electrical connection of the electrode leads (110) through the alignment unit (210) and the connection unit (220) will be described in detail.

[0070] Referring to FIG. 4, a plurality of electrode leads (110) of a battery cell (100) can be grouped into a predetermined number to form one or more lead groups (111).

[0071] A lead group (111) can be formed by applying pressure to the positive lead (111a) and the negative lead (111b) (see FIG. 3) in a lateral direction (X-axis direction). Referring to FIG. 4, pressure can be applied in the direction of the arrows on both sides of the lead group (111), and such pressure can be applied by a pressure jig, etc. The pressurized and grouped lead group (111) can be maintained in a pressurized state as shown in FIG. 5 by being inserted through the second slot (221) of the connection unit (220).

[0072] For example, a lead group (111) can be formed by pressurizing and grouping the positive lead (111a) and the negative lead (111b) individually illustrated in FIG. 3. The electrode leads (110) within a lead group (111) can be electrically connected to each other. The positive lead (111a) and the negative lead (111b) can be electrically connected by being grouped into a lead group (111).

[0073] Meanwhile, individual lead groups (111) may not be electrically connected to each other. Electrode leads (110) grouped into one lead group (111) may be electrically connected to each other, while being isolated from other electrode leads (110).

[0074] As described above, the electrode leads (110) may include positive leads (111a) and negative leads (111b). The electrode leads (110) may be provided in the required number according to the design of the battery module (1), and the number of positive leads (111a) and negative leads (111b) may be equal.

[0075] For example, according to an embodiment in which a total of 12 electrode leads (110) are provided as shown in FIG. 3, the electrode leads (110) may be provided with 6 positive leads (111a) and 6 negative leads (111b).

[0076] The alignment of the electrode leads (110) can also be determined according to the design of the battery module (1). For example, referring to FIG. 3, the 12 electrode leads (110) can be aligned by repeating the arrangement of "2 positive leads (111a) + 2 negative leads (111b)" a total of 3 times. As another example, the 12 electrode leads (110) can be aligned by repeating the arrangement of "3 positive leads (111a) + 3 negative leads (111b)" a total of 2 times. As yet another example, the 12 electrode leads (110) can be aligned by repeating the arrangement of "1 positive lead (111a) + 1 negative lead (111b)" a total of 6 times.

[0077] The number of electrode leads (110) described above, the number of positive leads (111a) and negative leads (111b), the alignment method, etc. are all merely examples for illustrative purposes, and the technical concept of the present invention is not limited by such examples.

[0078] A lead group (111) may refer to a configuration in which electrode leads (110) are grouped into a predetermined number. For example, a lead group (111) may include a predetermined number of positive leads (111a) and negative leads (111b). Each lead group (111) may include the same number of positive leads (111a) and negative leads (111b), and the number and configuration of the lead groups (111) may vary depending on the design of the battery module (1).

[0079] For example, referring to FIGS. 3 and 4, one lead group (111) may include a total of four electrode leads (110), including two positive leads (111a) and two negative leads (111b). And if this grouping is repeated three times, a total of 12 electrode leads (110) may be grouped into three electrode lead groups (111).

[0080] For another example, if there are a total of 12 electrode leads (110) and one lead group (111) includes one positive lead (111a) and one negative lead (111b), a total of 6 lead groups (111) can be formed.

[0081] As another example, if one lead group (111) includes three positive leads (111a) and three negative leads (111b), a total of two lead groups (111) can be formed.

[0082] In addition, a different number of electrode leads (110) than the example described above may be grouped into different numbers to form lead groups (111). Accordingly, the number of electrode leads (110) and lead groups (111) shown in the drawings of this specification, such as FIG. 3 or FIG. 4, or mentioned in this specification are exemplary for convenience of explanation, and the technical concept of the present invention is not limited by the number of electrode leads (110) or lead groups (111).

[0083] Referring to FIG. 4, the connecting unit (220) may include a plurality of second slots (221), each of which may be provided in correspondence with a lead group (111). More specifically, each second slot (221) may be positioned in a location corresponding to a lead group (111). Lead groups (111) may be inserted through the corresponding second slot (221). The second slot (221) may be configured to ensure that the grouping of the inserted lead groups (111) is firmly maintained.

[0084] Referring further to FIG. 5, the lead group (111) formed by pressing the positive lead (111a) and the negative lead (111b) can be inserted through the corresponding second slot (221).

[0085] In the state of FIG. 4, when the connecting unit (220) is moved downward (-Z-axis direction) or the lead group (111) is moved upward (+Z-axis direction), the lead group (111) can be inserted through the second slot (221) of the connecting unit (220) as shown in FIG. 5. In this way, when the lead group (111) is inserted through the second slot (221), the electrical connection between the electrode leads (110) included in the lead group (111) can be stably maintained mechanically without welding.

[0086] FIG. 6 is a cross-sectional view of a battery cell and a busbar frame of a battery module according to one embodiment of the present invention.

[0087] FIG. 6 may be a cross-sectional view looking at the AA' cross-section when the electrode leads (110) of the battery cell (100) are assembled to the busbar frame (200) as shown in FIG. 5. FIG. 6 is described based on an embodiment in which there are a total of 12 electrode leads (110) assembled to one busbar frame (200) with reference to other drawings, and the lead group (111) includes two positive leads (111a) and a negative lead (111b), but as previously mentioned, this number is exemplary.

[0088] FIG. 6 illustrates not only the busbar frame (200) in the -Y-axis direction described with reference to FIG. 2 to 5, but also the opposite busbar frame (200) in the +Y-axis direction.

[0089] Referring to FIG. 6, electrode leads (110) and a busbar frame (200) that aligns and connects them can be arranged in the same manner as the structure described above, not only in the -Y direction but also in the +Y direction of the battery cell (100). However, this is exemplary, and depending on the design of the battery module (1), the electrode leads (110) may be drawn out only to one side of the battery cell (100), and the busbar frame (200) may also be arranged only to one side.

[0090] As the electrode leads (110) are electrically connected by the busbar frames (200), a plurality of battery cells (100) of the battery module (1) can be electrically connected.

[0091] The electrode leads (110) included in one lead group (111) can be electrically connected in a combined form of parallel and series connections.

[0092] For example, if a lead group (111) is formed by grouping two positive leads (111a) and two negative leads (111b), the two positive leads (111a) within the lead group (111) can be connected in parallel because there is no potential difference between them, and the two negative leads (111b) can also be connected in parallel because there is no potential difference between them. And, since a potential difference is formed between the positive leads (111a) connected in parallel and the negative leads (111b) connected in parallel, they can be connected in series.

[0093] Referring to FIG. 6, the structure of positive leads (111a) and negative leads (111b) connected through a lead group (111) can be seen. A lead group (111) may internally include a parallel connection between positive leads (111a), a parallel connection between negative leads (111b), and a series connection between the parallel-connected positive leads (111a) and negative leads (111b).

[0094] By grouping the electrode leads (110) into lead groups (111), a serial or parallel connection between the electrode leads (110) can be made, and the battery cells (100) can be connected in series or in parallel, and this electrical connection can be maintained more stably by inserting the lead groups (111) through the second slot (221) of the connection unit (220).

[0095] The number of battery cells (100) connected in parallel may vary depending on the design, and various numbers of battery cells (100), such as 2, 3, or 4, may be connected in parallel, and these parallel-connected battery cells (100) may be connected in series.

[0096] The number of battery cells (100) connected in parallel, and the number of times the parallel-connected battery cells (100) are connected in series, etc., can be adjusted according to electrical characteristics such as voltage, current, and power capacity required by the battery module (1).

[0097] When a plurality of battery cells (100) are grouped and connected, a positive lead group (111a') containing only positive leads (111a) and a negative lead group (111b') containing only negative leads (111b) may be formed at both ends. For example, referring to FIG. 6, a negative lead group (111b') consisting of two negative leads (111b) is arranged at the lower left, and a positive lead group (111a') consisting of two positive leads (111a) is arranged at the lower right. The positive group leads (111a') and negative group leads (111b') as in the above embodiment can function as electrode terminals for supplying power to the outside of a plurality of battery cells (100) connected in series or parallel.

[0098] And, the positive lead group (111a') and the negative lead group (111b') can also be inserted through the second slot (221) just like the other lead groups (111).

[0099] The battery module (1) of the present invention aligns the electrode leads (110) through the first slot (211) of the alignment unit (210) and then inserts them into the second slot (221) of the connection unit (220) in units of lead groups (111) to electrically connect them, thereby making electrical connections in units of lead groups (111) that are grouped in a preset number, so that the assembly process can be further simplified.

[0100] By mechanically connecting the electrode leads (110) in units of lead groups (111), the electrical connection between the battery cells (100) can be maintained more robustly. For example, when the battery module (1) is subjected to external shock or vibration, compared to a structure where individual electrode leads (110) are connected individually by welding or via a busbar, the connection stability between individual electrode leads (110) is improved and the durability of the battery module (1) can be improved by mechanically connecting the multiple electrode leads (110) in units of lead groups (111) according to the embodiment of the present invention.

[0101] The battery module (1) of the present invention can provide various advantages such as simplification of the assembly process, improvement of performance of the battery module (1), improved durability and stability, and increased scalability by electrically connecting the electrode leads (110) through mechanical connections in units of lead groups (111) grouped in a predetermined number, rather than simply connecting them individually through welding.

[0102] According to one embodiment of the present invention, the alignment unit (210) may be formed of an insulator. The alignment unit (210) performs the role of aligning electrode leads (110) but does not include a configuration for electrical connection. The alignment unit (210) may align a plurality of electrode leads (110) at uniform intervals and provide an insulating function that prevents electrical connection between the electrode leads (110). According to the above embodiment, the electrode leads (110) are mechanically / electrically isolated in the alignment unit (210), thereby preventing unintentional electrical connection that may occur during the alignment process of the electrode leads (110).

[0103] FIG. 7 is a plan view of a connection unit of a battery module according to an embodiment of the present invention. The connection unit (220) will be described below with further reference to FIG. 7.

[0104] According to one embodiment of the present invention, the connecting unit (220) may also be formed of an insulating material, similar to the alignment unit (210). The connecting unit (220) may align a plurality of lead groups (111) at uniform intervals and provide an insulating function that prevents electrical connection between the lead groups (111). According to the above embodiment, electrical connection between adjacent lead groups (111) can be prevented, the possibility of an electrical short circuit between the lead groups (111) can be eliminated, and the electrical stability of the battery module (1) can be ensured.

[0105] Referring to FIGS. 5 through 7, the battery module (1) may further include a bus bar (230) made of a conductor. The bus bar (230) may be placed in each second slot (221) of the connection unit (220). The bus bar (230) may be electrically connected by contacting a lead group (111) inserted into the second slot (221).

[0106] In embodiments of the present invention, the manner in which the busbar (230) is positioned in the second slot (221) is not limited. For example, the busbar (230) may be inserted into the inner side of the second slot (221). As another example, the busbar (230) may be attached to a part of the connecting unit (220) near the second slot (221).

[0107] The busbar (230) can perform the function of collecting or distributing current among the electrode leads (110). Multiple electrode leads (110) included in the lead group (111) can be electrically connected through the busbar (230) placed in the second slot (221). For example, the busbar (230) may be configured to stably transmit current by including a metal material such as copper (Cu) or aluminum (Al).

[0108] The busbar (230) is configured to electrically connect the electrode leads (110) of the lead group (111) placed on the busbar (230), and electrical connection with the lead group (111) placed on another busbar (230) needs to be prevented. The connection unit (220) on which the busbar (230) is placed is formed of an insulator so that an electrical short circuit between different busbars (230) can be prevented. More specifically, the lead group (111) is electrically connected to the busbar (230) placed in the second slot (221), while the individual busbars (230) are electrically insulated by the connection unit (220) which is an insulator, thereby eliminating the possibility of an electrical short circuit between the lead groups (111).

[0109] According to the above embodiment, the busbar frame (200) of the battery module (1) arranges electrode leads (110) in units of lead groups (111), which are preset groups, and electrically connects them, thereby enabling stable power transmission while minimizing the possibility of an electrical short circuit.

[0110] According to one embodiment of the present invention, the alignment unit (210) and the connection unit (220) of the battery module (1) each perform separate roles, thereby increasing the assembly stability of the battery module (1) and improving electrical reliability. The alignment unit (210) accurately aligns the electrode leads (110) while also performing an insulating role, and the connection unit (220) stably connects the aligned lead group (111) to the busbar (230), thereby enabling a systematic electrical connection.

[0111] The battery module (1) of the present invention can reduce the possibility of errors during the assembly process and simplify the manufacturing process by performing the alignment and electrical connection of the electrode leads (110) through an independent configuration, and can further improve the electrical reliability and durability of the battery module (1).

[0112] Referring to FIG. 7, the bus bar (230) may have a shape corresponding to the second slot (221) and may include a third slot (231) formed at a position corresponding to the second slot (221).

[0113] A third slot (231) may be formed so that a lead group (111) can be inserted. A bus bar (230) may be placed in a second slot (221), and a third slot (231) may be formed in the bus bar (230). The third slot (231) may be placed to be aligned with the second slot (221). According to the above embodiment, the lead group (111) can be inserted through the second slot (221) simultaneously by being inserted through the third slot (231).

[0114] The lead group (111) inserted through the third slot (231) can be electrically connected by contacting the bus bar (230), and the electrical connection between the electrode leads (110) grouped to the lead group (111) can also be made more stably.

[0115] The third slot (231) can serve to precisely guide the insertion position of the lead group (111) to the busbar (230) and to ensure that the lead group (111) is fixed in the correct position. This minimizes the possibility of the lead group (111) being fixed in the wrong position, thereby improving the reliability of the electrical connection, increasing the assembly precision of the battery module (1), and ensuring consistency in the manufacturing process.

[0116] The third slot (231) can be formed so that the lead group (111) can be inserted through it and is mechanically and stably supported. For example, referring to FIG. 7, the width (D1) of the third slot (231) can be formed to be approximately equal to the thickness (D2) of the lead group (111).

[0117] The width (D1) of the third slot (231) is formed to correspond to the thickness (D2) of the lead group (111), thereby improving the contact stability between the lead group (111) and the busbar (230). Additionally, the reliability of the electrical connection can be increased by ensuring that the lead group (111) is accurately seated in the third slot (231).

[0118] Since electrical resistance is inversely proportional to the contact area, if the contact area between the lead group (111) and the bus bar (230) is narrow, unnecessary contact resistance may occur, which can be a problem. According to the above embodiment, the degree of contact between the lead group (111) and the bus bar (230) is increased, so unnecessary contact resistance can be prevented. Accordingly, power transfer efficiency can be improved, and the electrical performance of the battery module (1) can be maintained stably.

[0119] Meanwhile, the first slots (211) of the alignment unit (210) of the battery module (1) according to one embodiment of the present invention may be formed in a cut shape to facilitate the insertion of the electrode lead (110) through.

[0120] For example, referring to FIG. 3, the first slots (211) may be formed in a cut shape with one side direction (-Z-axis direction) closed and the other side direction (+Z-axis direction) open. Accordingly, since the electrode lead (110) can be inserted through the open area of ​​the first slot (211), the degree of freedom of the assembly direction of the electrode lead (110) with respect to the alignment unit (210) is increased, and the assembly process can be made easier.

[0121] Meanwhile, the second slots (221) of the connection unit (220) of the battery module (1) according to one embodiment of the present invention may also be formed in a cut shape to facilitate the insertion of the lead group (111) through.

[0122] For example, referring to FIG. 4, the second slots (221) may be formed in a cut shape with the other direction (+Z-axis direction) closed and the one direction (-Z-axis direction) open. Accordingly, since the lead group (111) can be inserted through the open area of ​​the second slot (221), the degree of freedom of the assembly direction of the lead group (111) to the connection unit (220) is increased, and the assembly process can be made easier.

[0123] The first slots (211) and the second slots (221) can have a mutually complementary structure by being formed with different cutting directions. As described above, the first slots (211) are formed with one side direction (-Z-axis direction) closed and the other side direction (+Z-axis direction) open, while the second slots (221) are formed with the other side direction (+Z-axis direction) closed and one side direction (-Z-axis direction) open.

[0124] According to the above embodiment, since the first slots (211) and the second slots (221) are cut in opposite directions, electrode leads (110) inserted into the first slot (211) in the -Z axis direction can be prevented from moving out in the +Z axis direction, and lead groups (111) inserted into the second slot (221) in the +Z axis direction can also be prevented from moving out in the -Z axis direction.

[0125] More specifically, as described above, the alignment unit (210) having the first slot (211) formed and the connection unit (220) having the second slot (221) formed can be mechanically connected to each other (see FIG. 5). In addition, since the lead group (111) is a concept in which the electrode leads (110) are grouped, it can be viewed as having the same configuration physically connected to the electrode leads (110).

[0126] Therefore, even if the electrode lead (110) inserted into the first slot (211) receives force in the +Z axis direction, the second slot (221) has a closed structure in the +Z axis direction, so the movement of the lead group (111) in the +Z axis direction can be restricted, and accordingly, the movement of the electrode lead (110) in the +Z axis direction can also be restricted.

[0127] Conversely, even if the lead group (111) inserted into the second slot (221) is subjected to force in the -Z axis direction, the first slot (211) has a closed structure in the -Z axis direction, so the movement of the electrode lead (110) in the -Z axis direction may be restricted, and accordingly, the movement of the lead group (111) in the -Z axis direction may also be restricted.

[0128] Generally, a structure that is easy to assemble is likely to be relatively easy to separate as well, while conversely, a structure that is rigid to assemble may result in reduced workability during the assembly process. According to the battery module (1) of the present embodiment, the cutting directions of the first slot (211) and the second slot (221) are formed in mutually opposite directions, thereby allowing the electrode lead (110) and the lead group (111) to be easily assembled with respect to the first slot (211) and the second slot (221) while maintaining a strong fastening force that prevents easy separation.

[0129] Accordingly, according to the first slot (211) and the second slot (221) of the above embodiment of the present invention, workability during the assembly process is improved, and at the same time, structural stability of the lead group (111) and the electrode lead (110) can be maintained after assembly.

[0130] Referring to FIG. 7, meanwhile, the third slot (231) may be provided in a shape that is open and cut in the same direction as the second slot (221). The third slot (231) with this configuration may not hinder the insertion of the lead group (111) through the open portion of the second slot (221).

[0131] FIG. 8 is an exploded perspective view for explaining a busbar frame according to one embodiment of the present invention.

[0132] The alignment unit (210) may include a first extension (212). The first extension (212) may be formed to extend in one direction from one side where the first slots (211) are closed. The first extension (212) may be formed to extend integrally with the alignment unit (210). For example, referring to FIG. 8, the first extension (212) may be formed to extend in the -Y-axis direction from the lower side (-Z-axis direction) where the first slot (211) is closed.

[0133] When the assembly of the busbar frame (200) is completed, the first extension (212) can be in surface contact with a region of the connecting unit (220). For example, referring to FIG. 8, the first extension (212) can be provided to be in surface contact with at least a region of the surface of the connecting unit (220) facing the -Z axis direction.

[0134] According to the present embodiment, beyond the alignment unit (210) and the connection unit (220) being spaced apart and arranged side by side, surface contact is made through the first extension part (212), thereby allowing for more accurate relative positional alignment between the two components and improved structural stability between the two components.

[0135] More specifically, the alignment unit (210) and the connecting unit (220) need to maintain a mutually aligned state during assembly. Even when the alignment unit (210) and the connecting unit (220) are placed side by side, relative positional alignment is possible, but there is a possibility that the alignment state may change during the individual assembly process. On the other hand, according to the present embodiment, the first extension (212) of the alignment unit (210) makes surface contact with a region of the connecting unit (220), thereby making it easier to maintain relative positional alignment between the two components and reducing the possibility of error during the assembly process.

[0136] Additionally, structural stability between the alignment unit (210) and the connecting unit (220) can be improved by making surface contact. During the assembly process, the possibility of the alignment unit (210) and the connecting unit (220) sliding or shaking in a specific direction can be reduced, and the possibility of relative positional alignment being misaligned after assembly can be reduced. For example, referring to FIG. 8, the surface of the connecting unit (220) in the -Z axis direction is blocked by the first extension (212), thereby restricting the movement of the connecting unit (220) in the -Z axis direction, so the possibility of misalignment between the alignment unit (210) and the connecting unit (220) can be reduced or eliminated.

[0137] Additionally, the alignment unit (210) is responsible for aligning the electrode leads (110), and the connection unit (220) is responsible for electrically connecting the lead group (111). Accordingly, the structural stability of the alignment unit (210) and the connection unit (220) is improved by the first extension part (212), thereby allowing the alignment state of the electrode leads (110) and the connection state of the lead group (111) to be maintained more stably.

[0138] Additionally, a busbar (230) may be disposed in the connection unit (220), and the electrode leads (110) within the lead group (111) may be electrically connected through the busbar (230). According to the above embodiment, the alignment unit (210) and the connection unit (220) are structurally and stably arranged through surface contact, thereby maintaining a more stable connection state between the lead group (111) and the busbar (230). Accordingly, changes in contact resistance or a decrease in electrical reliability can be prevented.

[0139] And, referring to FIG. 8, the first extension (212) may be provided to block the area where the second slot (221) of the connecting unit (220) is cut and opened. The first extension (212) may additionally have the function of preventing the aforementioned lead group (111) from detaching from the second slot (221) by blocking the opening of the second slot (221).

[0140] In summary, by forming the alignment unit (210) to be in surface contact with the connection unit (220) through the first extension (212) of the alignment unit (210), the structural stability of the alignment unit (210) and the connection unit (220) can be improved, and the alignment and electrical connection of the electrode lead (110) and the lead group (111) can also be maintained more stably.

[0141] Meanwhile, the surface contact area between the alignment unit (210) and the connection unit (220) may subsequently become an area for mechanical fastening. For example, if the alignment unit (210) and the connection unit (220) are joined by additional fastening elements during a subsequent assembly process, the fastening elements may be placed in the surface contact area.

[0142] For example, referring to FIG. 8, the connecting unit (220) may further include a first protrusion (223) formed in an area where the first extension (212) makes surface contact. Additionally, the alignment unit (210) may further include a first groove (213) provided on the first extension (212) and formed to be fitted together with the first protrusion (223).

[0143] The first protrusion (223) and the first groove (213) can serve as fastening elements for the alignment unit (210) and the connection unit (220). The first protrusion (223) may have the same shape as the second protrusion (214) described later, but with a different position and direction. Therefore, the enlarged view of the second protrusion (214) in FIG. 8 can serve as a reference for understanding the shape of the first protrusion (223).

[0144] The first protrusion (223) and the first groove (213) can be configured to be joined in a protrusion-groove joining manner, thereby allowing the assembly of the alignment unit (210) and the connection unit (220) to be more robust.

[0145] Furthermore, the shapes of the first protrusion (223) and the first groove (213) can be implemented in various ways so that a strong bonding force can be maintained even after assembly is completed.

[0146] For example, the end of the first protrusion (223) may be formed in the shape of a hook, or the diameter of the end may be formed to be relatively larger than that of other regions. This structure can be easily joined during assembly, but can be configured so that it is not easily separated once fastening is complete, and can be called a so-called 'snap-fit' method, and can provide stable fastening force without a separate fastening member.

[0147] The arrangement of the first protrusion (223) and the first groove (213) described above is exemplary and may be configured in the opposite way. For example, the first protrusion (223) may be provided on the first extension (212) of the alignment unit (210), and the first groove (213) may be formed on the connecting unit (220). Such modified embodiments may also be implemented within the technical scope of the present invention.

[0148] As previously described, the alignment unit (210) and the connecting unit (220) can be aligned by making surface contact through the first extension (212), going beyond being placed side by side. According to the above embodiment, structural stability is secured through surface contact, and at the same time, the bonding force can be further strengthened by adding a protrusion-groove coupling method between the first protrusion (223) and the first groove (213).

[0149] According to the above embodiment, the alignment unit (210) is configured to facilitate assembly through surface contact between the alignment unit (210) and the connection unit (220) via the first extension part (212), and further includes a protrusion-groove coupling structure in the surface contact area so that the connection state after assembly can be maintained more firmly. Accordingly, the assembly stability of the battery module (1) can be improved, and the relative positional alignment between the alignment unit (210) and the connection unit (220) can be maintained even after assembly. Furthermore, the lead group (111) and busbar (230) electrically connected to the electrode lead (110) aligned by the alignment unit (210) and the connection unit (220) can also be maintained stably after assembly.

[0150] Meanwhile, referring to FIG. 8, the connecting unit (220) may include a second extension (222). The structure and function of the second extension (222), the second protrusion (214), and the second groove (224) described below may be similar to the structure and function of the first extension (212), the first protrusion (223), and the first groove (213) described above.

[0151] The second extension (222) may be formed to extend in one direction from one side where the second slots (221) are closed. The second extension (222) may be formed to extend integrally with the connecting unit (220). For example, referring to FIG. 8, the second extension (222) may be formed to extend in the +Y-axis direction from the upper side (+Z-axis direction) where the second slots (221) are closed.

[0152] When the assembly of the busbar frame (200) is completed, the second extension (222) can be in surface contact with a region of the alignment unit (210). For example, referring to FIG. 8, the second extension (222) can be provided to be in surface contact with at least a region of the surface facing the +Z axis direction of the alignment unit (210).

[0153] According to the present embodiment, beyond the connection unit (220) and the alignment unit (210) being spaced apart and arranged side by side, surface contact is made through the second extension part (222), thereby allowing for more accurate relative positional alignment between the two components and improved structural stability between the two components.

[0154] Even when the connecting unit (220) and the alignment unit (210) are placed side by side, relative position alignment is possible. However, according to the present embodiment, the second extension (222) of the connecting unit (220) makes surface contact with one area of ​​the alignment unit (210), thereby making it easier to maintain relative position alignment between the two components and reducing the possibility of error during the assembly process.

[0155] Additionally, structural stability between the connecting unit (220) and the alignment unit (210) can be improved by making surface contact. During the assembly process, the possibility of the connecting unit (220) and the alignment unit (210) sliding or shaking in a specific direction can be reduced, and the possibility of relative positional alignment being misaligned after assembly can be reduced. For example, referring to FIG. 8, the surface of the alignment unit (210) in the +Z-axis direction is blocked by the second extension (222), thereby restricting the movement of the alignment unit (210) in the +Z-axis direction, so the possibility of misalignment between the alignment unit (210) and the connecting unit (220) can be reduced or eliminated.

[0156] Additionally, the connection unit (220) is responsible for the electrical connection of the lead group (111), and the alignment unit (210) is responsible for the alignment of the electrode leads (110). Accordingly, the structural stability of the connection unit (220) and the alignment unit (210) is improved by the second extension part (222), thereby allowing the connection state of the lead group (111) and the alignment state of the electrode leads (110) to be maintained more stably.

[0157] In addition, according to the above embodiment, the connection unit (220) and the alignment unit (210) are structurally and stably arranged through surface contact, so that the connection state between the lead group (111) and the busbar (230) can also be maintained more stably. Accordingly, changes in contact resistance or a decrease in electrical reliability can be prevented.

[0158] And, referring to FIG. 8, the second extension (222) may be provided to block the area where the first slot (211) of the alignment unit (210) is cut and opened. The second extension (222) may additionally have the function of preventing the aforementioned lead group (111) from escaping from the first slot (211) by blocking the opening of the first slot (211).

[0159] In summary, by forming the second extension (222) of the connection unit (220) to be in surface contact with the alignment unit (210), the structural stability of the connection unit (220) and the alignment unit (210) can be improved, and the alignment and electrical connection of the lead group (111) and the electrode lead (110) can also be maintained more stably.

[0160] Meanwhile, the surface contact area between the connecting unit (220) and the alignment unit (210) may subsequently become an area for mechanical fastening. For example, if the connecting unit (220) and the alignment unit (210) are joined by additional fastening elements during a subsequent assembly process, the fastening elements may be placed in the surface contact area.

[0161] For example, referring to the enlarged view of FIG. 8, the alignment unit (210) may further include a second protrusion (214) formed in the area where the second extension (222) makes surface contact. Additionally, the connecting unit (220) may further include a second groove (224) provided on the second extension (222) and formed to be fitted and coupled with the second protrusion (214).

[0162] The second protrusion (214) and the second groove (224) can serve as fastening elements for the alignment unit (210) and the connecting unit (220). The second protrusion (214) and the second groove (224) can be configured to be joined in a protrusion-groove joining manner, thereby allowing the assembly of the connecting unit (220) and the alignment unit (210) to be more robust.

[0163] Furthermore, the shapes of the second protrusion (214) and the second groove (224) can be implemented in various ways so that a strong bonding force can be maintained even after assembly is completed. For example, the end of the second protrusion (214) may be formed in a hook shape, or the diameter of the end may be formed to be relatively larger than other areas. This structure can be easily joined during assembly, but can be configured so that it is not easily separated once fastening is complete, and can provide a stable bonding force without a separate fastening member.

[0164] The arrangement of the second protrusion (214) and the second groove (224) described above is exemplary and may be configured in the opposite way. For example, the second protrusion (214) may be provided on the second extension (222) of the connecting unit (220), and the second groove (224) may be formed on the alignment unit (210). Such modified embodiments may also be implemented within the technical scope of the present invention.

[0165] As previously described, the connecting unit (220) and the alignment unit (210) can be aligned by making surface contact through the second extension (222), going beyond being placed side by side. According to the above embodiment, structural stability is secured through surface contact, and at the same time, the bonding force can be further strengthened by adding a protrusion-groove coupling method between the second protrusion (214) and the second groove (224).

[0166] According to the above embodiment, the connecting unit (220) is configured to facilitate assembly through surface contact between the connecting unit (220) and the alignment unit (210) via the second extension part (222), and further includes a protrusion-groove coupling structure in the surface contact area so that the connection state after assembly can be maintained more firmly. Accordingly, the assembly stability of the battery module (1) can be improved, and the relative positional alignment between the connecting unit (220) and the alignment unit (210) can be maintained even after assembly. Furthermore, the lead group (111) and busbar (230) electrically connected by the connecting unit (220) and the electrode lead (110) aligned by the alignment unit (210) can also be maintained stably after assembly.

[0167] Meanwhile, referring to FIG. 8, the embodiment regarding the first extension (212), the first protrusion (223), and the first groove (213) and the embodiment regarding the second extension (222), the second protrusion (214), and the second groove (224) may be implemented in combination.

[0168] For example, the alignment unit (210) may include a first extension (212), and the connecting unit (220) may include a second extension (222). Additionally, to strengthen the connection between the alignment unit (210) and the connecting unit (220), a first protrusion (223) and a first groove (213) may be provided, and a second protrusion (214) and a second groove (224) may also be provided.

[0169] According to the above embodiment, the first extension (212) of the alignment unit (210) and the second extension (222) of the connection unit (220) are formed together, thereby allowing the surface contact area between the two components to be further expanded. Accordingly, the relative positional alignment between the alignment unit (210) and the connection unit (220) can be maintained more easily, and the structural stability of the entire busbar frame (200) can be improved.

[0170] In particular, as the surface contact area is expanded, the frictional force formed between the alignment unit (210) and the connecting unit (220) can also be increased. Since the frictional force through surface contact acts over a wider area, the relative positional alignment between the two components after assembly can be maintained more stably, and the possibility of deformation due to external forces or vibrations can be reduced. Since the possibility of the alignment unit (210) and the connecting unit (220) sliding or shaking relative to each other is reduced during the assembly process, more precise assembly can be achieved.

[0171] In addition, the bonding force between the alignment unit (210) and the connecting unit (220) can be further strengthened by applying a protrusion-groove coupling structure while simultaneously making surface contact. For example, the first protrusion (223) and the first groove (213), and the second protrusion (214) and the second groove (224) are respectively fitted together, thereby further increasing the bonding force between the alignment unit (210) and the connecting unit (220). In particular, as two protrusion-groove structures are applied simultaneously, a strong bonding force can be maintained even after assembly, and the possibility of the relative alignment between the two components being disrupted by external shock or vibration can be further reduced.

[0172] Additionally, since the first extension part (212) and the second extension part (222) are formed to extend in opposite directions from the alignment unit (210) and the connecting unit (220), respectively, the overall structure can be maintained more robustly after assembly. According to the above embodiment, the possibility of the alignment unit (210) and the connecting unit (220) sliding or shaking in a specific direction can be minimized even after they are joined together.

[0173] In addition, the assembly structure of the alignment unit (210) and the connection unit (220) according to the present embodiment allows the lead group (111) and the bus bar (230) electrically connected by the connection unit (220) and the electrode lead (110) aligned by the alignment unit (210) to be maintained more stably. The possibility of the alignment state of the electrode lead (110) changing after assembly is further reduced, and the connection state of the lead group (111) and the bus bar (230) can also be maintained stably. Accordingly, changes in contact resistance or a decrease in electrical reliability can be prevented, and the overall electrical performance of the battery module (1) can be improved.

[0174] In summary, in an embodiment including a first extension (212), a second extension (222), a first protrusion (223), and a second protrusion (214) as in the present embodiment, the surface contact area between the alignment unit (210) and the connection unit (220) is further expanded, and the assembly strength and structural stability can be further improved by ensuring that the protrusion-groove coupling is performed in both areas. Furthermore, by simultaneously increasing the frictional force through surface contact and increasing the coupling force of the protrusion-groove coupling structure, the overall structural stability of the battery module (1) can be maximized. Additionally, since the alignment and electrical connection state of the electrode lead (110) and the lead group (111) can be maintained more stably, the reliability of the battery module (1) can be maximized.

[0175] FIG. 9 is an exploded perspective view for explaining a busbar frame of a battery module according to one embodiment of the present invention.

[0176] FIG. 9 illustrates the alignment structure of an alignment unit (210) and a connection unit (220) according to an embodiment of the present invention. Hereinafter, with reference to FIG. 9, the configuration of a first insertion part (215) that may be included in the alignment unit (210) and its effect will be explained.

[0177] The alignment unit (210) may include a plurality of first insertion parts (215). The first insertion part (215) may be formed in a protruding shape in one area of ​​the alignment unit (210) and may be inserted into at least a portion of the second slot (221) and / or third slot (231) of the connection unit (220). For example, referring to FIG. 9, the first insertion part (215) may be protruded in the -Y-axis direction and inserted into at least a portion of the second slot (221) and / or third slot (231).

[0178] The first insertion part (215) may be formed of an insulator. In this case, electrical interference can be prevented even when in contact with the bus bar (230), and unnecessary electrical connection with the electrode lead (110) can also be prevented.

[0179] The first insertion part (215) may be inserted near the open and cut area of ​​the second slot (221) or the third slot (231). For example, referring to FIG. 9, the first insertion part (215) may be provided to be inserted into the lower area (-Z-axis direction) of the second slot (221) or the third slot (231). In this case, the lower area may mean a relatively lower area than when the lead group (111) is inserted into the second slot (221) or the third slot (231).

[0180] According to this configuration, when the second slot (221) or the third slot (231) is opened downward, the first insert (215) can fill at least a portion of the open area. As a result, the possibility of the lead group (111) inserted into the second slot (221) or the third slot (231) coming loose can be further reduced, and the insertion and assembly stability of the lead group (111) can be improved.

[0181] Additionally, the first insert (215) may be positioned in a shape similar to the lead group (111) within the second slot (221) or the third slot (231). The lead group (111) consists of electrode leads (110), but the first insert (215) is a dummy configuration that simply serves as a structural support and can be fitted into the slot in the same way as the lead group (111). Accordingly, the alignment state between the alignment unit (210) and the connection unit (220) can be maintained more stably, and the durability of the battery module (1) can be improved.

[0182] In particular, the first insert (215) can serve to further enhance the structural stability between the alignment unit (210) and the connecting unit (220). The alignment unit (210) and the connecting unit (220) require relative positional alignment during the assembly process, and the alignment state must be maintained even after assembly. According to the present embodiment, by inserting the first insert (215) into the second slot (221) or the third slot (231) of the connecting unit (220), the bonding force between the two components can be further increased. Accordingly, the possibility of deformation or displacement due to external shock or vibration can be further reduced.

[0183] Additionally, the first insertion part (215) is positioned inside the second slot (221) or the third slot (231) together with the lead group (111), thereby contributing to maintaining the electrical connection state of the lead group (111) more stably. The possibility of the lead group (111) unnecessarily shaking or deforming inside the second slot (221) is reduced, and accordingly, the connection state by close contact with the busbar (230) can be maintained more reliably.

[0184] In summary, the first insertion part (215) allows the alignment state of the alignment unit (210) and the connection unit (220) to be maintained more stably, and partially fills the open area of ​​the second slot (221) or the third slot (231) to prevent the lead group (111) from coming loose. As a result, the assembly stability of the battery module (1) can be improved, and the electrical connection state of the lead group (111) can be maintained more stably even after assembly.

[0185] FIG. 10 is an exploded perspective view for explaining a busbar frame of a battery module according to one embodiment of the present invention.

[0186] FIG. 10 illustrates the alignment structure of an alignment unit (210) and a connection unit (220) according to an embodiment of the present invention. Hereinafter, with reference to FIG. 10, the configuration of a second insertion part (225) that may be included in the connection unit (220) and its effect will be explained.

[0187] The connecting unit (220) may include a plurality of second insertion parts (225). The second insertion part (225) may be formed in a protruding shape in one area of ​​the connecting unit (220) and may be inserted into at least a portion of the first slot (211) of the alignment unit (210). For example, referring to FIG. 10, the second insertion part (225) may be inserted into at least a portion of the first slot (211) by protruding in the +Y-axis direction.

[0188] The second insertion part (225) may be formed of an insulator. In this case, electrical interference can be prevented even when in contact with the electrode lead (110), and unnecessary electrical connection with the electrode lead (110) can also be prevented.

[0189] The second insertion part (225) can be inserted near the open and cut area of ​​the first slot (211). For example, referring to FIG. 10, the second insertion part (225) can be provided to be inserted into the upper area (+Z-axis direction) of the first slot (211). In this case, the upper area may mean an area relatively higher than where the electrode lead (110) is inserted into the first slot (211).

[0190] According to this configuration, when the first slot (211) is opened in an upward direction, the second insertion part (225) can fill at least a portion of the open area. As a result, the possibility of the electrode lead (110) inserted into the first slot (211) coming loose can be further reduced, and the insertion and assembly stability of the electrode lead (110) can be improved.

[0191] Additionally, the second insert (225) may be positioned within the first slot (211) in a shape similar to the electrode lead (110). While the electrode lead (110) functions as an electrode terminal drawn from the battery cell (100), the second insert (225) is a dummy configuration that simply performs a structural support role and can be fitted into the first slot (211) in the same manner as the electrode lead (110). Accordingly, the alignment state between the connection unit (220) and the alignment unit (210) can be maintained more stably, and the durability of the battery module (1) can be improved.

[0192] In particular, the second insert (225) can serve to further enhance the structural stability between the connecting unit (220) and the alignment unit (210). The connecting unit (220) and the alignment unit (210) require relative positional alignment during the assembly process, and the alignment state must be maintained even after assembly. According to the present embodiment, by inserting the second insert (225) into the first slot (211) of the alignment unit (210), the bonding force between the two components can be further increased. Accordingly, the possibility of deformation or displacement due to external shock or vibration can be further reduced.

[0193] Additionally, the second insertion part (225) is positioned inside the first slot (211) together with the electrode lead (110), thereby contributing to maintaining the alignment state of the electrode lead (110) more stably. The possibility of the electrode lead (110) unnecessarily shaking or deforming inside the first slot (211) is reduced, and accordingly, the connection state by close contact with the busbar (230) can be maintained more reliably.

[0194] In summary, the second insertion part (225) allows the alignment state of the connection unit (220) and the alignment unit (210) to be maintained more stably and partially fills the open area of ​​the first slot (211) to prevent the electrode lead (110) from coming off. As a result, the assembly stability of the battery module (1) can be improved, and the electrical connection state of the electrode lead (110) can be maintained more stably even after assembly.

[0195] FIG. 11 is an exploded perspective view illustrating a busbar frame of a battery module according to one embodiment of the present invention.

[0196] FIG. 11 illustrates an alignment structure of an alignment unit (210) and a connection unit (220) according to an embodiment of the present invention. Hereinafter, with reference to FIG. 11, the effect provided by the combination of a first insertion part (215) that may be included in the alignment unit (210) and a second insertion part (225) that may be included in the connection unit (220) will be explained.

[0197] The busbar frame (200) of the present embodiment may simultaneously include a first insertion part (215) of the alignment unit (210) and a second insertion part (225) of the connection unit (220). The first insertion part (215) may be inserted into a second slot (221) or a third slot (231) of the connection unit (220), and the second insertion part (225) may be inserted into a first slot (211) of the alignment unit (210). Accordingly, the coupling strength between the alignment unit (210) and the connection unit (220) may be further increased, and structural stability may be improved.

[0198] First, the first insertion part (215) of the alignment unit (210) and the second insertion part (225) of the connection unit (220) can each act as a support structure within the slot of the relative configuration. As a result, the relative positional alignment of the alignment unit (210) and the connection unit (220) can be maintained more precisely, and shaking or deformation that may occur between the two configurations can be minimized.

[0199] In particular, the first insertion part (215) and the second insertion part (225) can each partially fill the open cut area of ​​the second slot (221) or the third slot (231) and the first slot (211). Accordingly, the position of the lead group (111) and the electrode lead (110) inserted inside the slot can be maintained more stably, and the possibility of the lead group (111) and the electrode lead (110) coming loose can be significantly reduced.

[0200] In addition, since the first insert part (215) and the second insert part (225) can be arranged symmetrically with respect to each other, the bonding force between the alignment unit (210) and the connection unit (220) can be further strengthened after assembly. For example, referring to FIG. 11, the first insert part (215) of the alignment unit (210) can be inserted in the -Y axis direction, while the second insert part (225) of the connection unit (220) can be inserted in the +Y axis direction. Accordingly, the relative movement between the two components in the assembled state can be restricted, and resistance to external shock or vibration can be further improved.

[0201] The first insertion part (215) and the second insertion part (225) can be formed of an insulator. Therefore, unnecessary electrical interference can be prevented even when in contact with the bus bar (230) or electrode lead (110), and the electrical reliability of the battery module (1) can be further improved.

[0202] In summary, according to the present embodiment, by simultaneously applying the first insertion part (215) of the alignment unit (210) and the second insertion part (225) of the connection unit (220), the alignment state between the alignment unit (210) and the connection unit (220) can be maintained more precisely, and structural stability can be significantly improved. In addition, by fixing the positions of the lead group (111) and the electrode lead (110) more firmly, the assembly stability and electrical reliability of the battery module (1) can be further improved.

[0203] FIG. 12 is a drawing for explaining a battery pack including a battery module according to one embodiment of the present invention.

[0204] Referring to FIG. 12, a battery pack (P) according to one embodiment of the present invention may include one or more of the battery modules (1) described above with reference to other drawings. Additionally, the battery pack (P) may include additional components other than the battery modules (1) according to the present invention. For example, the battery pack (P) according to the present invention may further include components such as a Battery Management System (BMS), a busbar, a relay, and a current sensor.

[0205] The battery pack (P) may further include a pack case. The pack case may include a plurality of plates, for example, a pack top plate (P1) and a pack tray (P2), etc.

[0206] The pack tray (P2) may provide a space in which one or more battery modules (1) can be stored. When a battery pack (P) contains multiple battery modules (1), the pack case may include a partitioned space to accommodate multiple battery modules (1) in separate compartments.

[0207] As described above with reference to FIG. 1, the battery module (1) may include a module case. However, the battery module (1) may not include a module case. For example, the battery cell and the busbar frame may not be placed in the internal space of the module case, but may be directly accommodated in the module receiving space inside the pack case. The battery pack (P) may include the battery cell and the busbar frame, but may not include a module case, and the components such as the pack top plate (P1) and the pack tray (P2) of the battery pack (P) may be configured to perform the function of the module case.

[0208] A battery pack (P) of this type can be called a Cell-to-Pack (CTP) because the battery cells are housed directly in the pack case without a module case. The technical concept of the present invention can also be applied to a battery pack (P) of the CTP type.

[0209] The technical concept of the present invention is not limited to the structure of a specific battery module (1), and can encompass not only a structure including a module case, but also a Cell-to-Pack (CTP) structure in which a battery cell is directly housed in a pack case.

[0210] FIG. 13 is a drawing for explaining a vehicle including a battery pack according to one embodiment of the present invention.

[0211] The battery pack (P) may include the same configurations as the battery pack described above with reference to other drawings.

[0212] Referring to FIG. 13, the vehicle (C) may include one or more battery packs (P) or battery modules (1). For example, the vehicle (C) may be any one of an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle, but is not limited thereto. The vehicle (C) may be any one of a four-wheeled vehicle or a two-wheeled vehicle. The vehicle (C) may operate by receiving power from the battery pack (P) or battery module (1) according to embodiments of the present invention.

[0213] Some or other embodiments of the present disclosure described above are not exclusive or distinct from one another. Some or other embodiments of the present disclosure described above may be used in combination or combined for their respective configurations or functions.

[0214] For example, this means that configuration A described in a specific embodiment and / or drawing and configuration B described in another embodiment and / or drawing can be combined. That is, it means that even if the combination between configurations is not directly described, combination is possible except in cases where it is described that combination is impossible.

[0215] The foregoing detailed description should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention. Explanation of the symbols

[0216] 1: Battery module 100: Battery cell 110: Electrode lead 111: Lead group 111a: Positive lead 111b: Cathode lead 111a`: Positive lead group 111b`: Cathode lead group 120: Cell case 200: Busbar frame 210: Alignment Unit 211: 1st Slot 212: 1st extension 213: 1st Home 214: Second protrusion 215: First insertion 220: Connection Unit 221: 2nd Slot 222: Second extension 223: 1st protrusion 224: 2nd Home 225: Second insertion 230: Busbar 231: 3rd Slot P: Battery pack P1: Pack top plate P2: Pack Tray C: Car

Claims

Claim 1 A battery module comprising: a plurality of battery cells each having a plurality of electrode leads; an alignment unit having a plurality of first slots formed therein, into which the electrode leads of the plurality of battery cells are each inserted through and aligned; and a connection unit that is mechanically coupled to the alignment unit and electrically connects the electrode leads aligned by the alignment unit by mechanically connecting them. Claim 2 In claim 1, the battery cell comprises one or more lead groups in which at least some of the plurality of electrode leads are grouped into a predetermined number, and the connection unit comprises a plurality of second slots provided corresponding to each of the lead groups. Claim 3 In paragraph 2, the battery module further comprises: a bus bar formed of a conductor and a bus bar formed of a conductor, wherein the alignment unit and the connection unit are formed of an insulator and are respectively disposed in each of the second slots. Claim 4 In paragraph 3, the busbar comprises a battery module including a third slot formed at a position corresponding to the second slot in a shape corresponding to the second slot. Claim 5 A battery module according to claim 4, wherein the width of the third slot is configured to be equal to the thickness of the lead group. Claim 6 A battery module according to paragraph 2, wherein the first slots are provided in a cut shape with one side closed and the other side open, and the second slots are provided in a cut shape with one side open and the other side closed. Claim 7 In claim 6, the alignment unit comprises a battery module including a first extension formed extending from one side where the first slots are closed and in surface contact with one area of ​​the connection unit. Claim 8 A battery module according to claim 7, wherein the connecting unit further comprises a first protrusion formed in an area where the first extension is in surface contact, and the alignment unit further comprises a first groove provided in the first extension and formed to be fitted and coupled with the first protrusion. Claim 9 In claim 6, the connecting unit comprises a battery module including a second extension formed extending from one side where the second slots are closed and in surface contact with one area of ​​the alignment unit. Claim 10 A battery module according to claim 9, wherein the alignment unit further comprises a second protrusion formed in an area where the second extension is in surface contact, and the connecting unit further comprises a second groove provided in the second extension and formed to be fitted and coupled with the second protrusion. Claim 11 In paragraph 2, the alignment unit comprises a battery module including a plurality of first insertion parts inserted into at least some of the second slots. Claim 12 In claim 1, the connection unit comprises a battery module including a plurality of second insertion parts inserted into at least some of the first slots. Claim 13 A battery pack comprising a battery module according to any one of claims 1 to 12. Claim 14 An automobile comprising the battery pack of paragraph 13.

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