Battery pack and method for manufacturing same

Abstract

Disclosed are a battery pack and a method of manufacturing the same, the battery pack comprising: a cell carrier holding an array of battery cells; a frame coupled to the monomer carrier to enhance rigidity of the monomer carrier; a column coupled to the monomer carrier and passing through the frame; and a coupling portion coupling the frame to the column. According to an embodiment of the present invention, a column integrally formed with a single carrier passes through and is coupled to a frame, thereby suppressing vibration of the single carrier.

Description

Technical Field

[0001] The invention relates to a battery pack and a method for manufacturing the same. Background Art

[0002] In general, with the rapid growth in demand for portable electronic devices such as notebook computers, camcorders, and mobile phones and the commercialization of robots and electric vehicles, research is actively being conducted to develop high-performance secondary batteries capable of repeated charge / discharge.

[0003] A battery pack suitable for medium to large electronic devices such as notebook computers, camcorders, personal digital assistants (PDAs), and car batteries includes a plurality of unit cells due to limited capacity of the unit cells.

[0004] Such a battery pack has a structure in which a large number of unit cells are electrically connected in series and / or in parallel. In order to ensure the sequential electrical connection of the unit cells, it is very important that the unit cells maintain a stable arrangement.

[0005] In particular, a cylindrical rechargeable battery used as a unit cell in a battery pack has difficulty in maintaining its arrangement due to its shape, and thus requires a separate fixing device such as a cell carrier.

[0006] The vibration generated in the process of fixing the single body carrier to the frame is transmitted through the stud. Here, if the fastening force of the stud is insufficient, it may cause damage to the product.

[0007] The above information disclosed in this Background section is provided for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute related (or prior) art. Summary of the invention

[0008] An aspect of the present invention is to provide a battery pack and a method of manufacturing the same, in which a cell carrier and a column are integrally formed with each other, thereby being able to ensure enhanced coupling force between the cell carrier and a frame.

[0009] These and other aspects and features of the present disclosure will be described in or will be apparent from the following description of some embodiments of the present disclosure.

[0010] According to one aspect of the present invention, a battery pack includes: a cell carrier holding an array of battery cells; a frame coupled to the cell carrier to enhance rigidity of the cell carrier; a column coupled to the cell carrier and passing through the frame; and a coupling portion coupling the frame to the column.

[0011] The frame may include: a first frame covering an edge of the unit carrier and coupled to the column; and a second frame covering an edge of the unit carrier and coupled to the first frame.

[0012] The first frame may include a pair of first frames facing each other, the second frame may include a pair of second frames facing each other, and the first frame and the second frame may partially overlap each other.

[0013] The first frame may include: a first frame body covering a first side surface of the single body carrier; a first frame extension extending from the first frame body and covering a second side surface of the single body carrier; and a first frame hole formed in the first frame body and allowing the column to pass therethrough.

[0014] The second frame may include: a second frame body covering the second side surface of the single body carrier and coupled to the first frame extension; and a second frame extension extending from the second frame body and coupled to the first frame body.

[0015] The second frame may further include: a second frame hole formed at an end of the second frame extension and preventing interference with the column passing through the first frame hole.

[0016] The monomeric support and the column may be formed integrally with each other.

[0017] The column including the metal material may be integrally formed with the single body carrier including the resin material by insert injection molding.

[0018] The column may include: a column inserting portion insert-molded into the single body carrier; a column coupling portion extending from the column inserting portion, exposed outside the single body carrier and coupled to the frame; and a column penetrating portion extending from the column coupling portion and passing through the frame.

[0019] The column inserting portion may include: an insertion embedding portion embedded in the cell carrier; and an insertion hole portion formed in the insertion embedding portion.

[0020] The combining portion may include: a first combining portion for welding the first frame to the column; and a second combining portion for welding the first frame to the second frame.

[0021] The battery pack may further include: a buffer material disposed between the cell carrier and the frame to absorb impact.

[0022] According to another aspect of the present invention, a battery pack manufacturing method includes: an insert molding step, in which a cell carrier and a column are formed by insert molding; a first bonding step, in which the column is bonded to a first frame covering a first side surface of the cell carrier; and a second bonding step, in which the first frame is bonded to a second frame covering a second side surface of the cell carrier.

[0023] The first combining step may include: a first moving step, in which the first frame is moved so that the column penetrating portion of the column passes through the first frame; a first close contact step, in which the first frame is in close contact with the column combining portion of the column; and a first bonding step, in which the first frame is bonded to the column.

[0024] The second combining step may include: a second close contact step in which the second frame is in close contact with the first frame without interfering with the pillar; and a second bonding step in which the first frame is bonded to the second frame.

[0025] The battery pack manufacturing method may further include a buffering step in which a buffering material for shock absorption is provided between the cell carrier and the first frame.

[0026] In the battery pack and the battery pack manufacturing method according to the embodiment of the present invention, the column formed integrally with the cell carrier passes through the frame and is coupled to the frame, thereby suppressing vibration of the cell carrier.

[0027] In the battery pack and the method for manufacturing the battery pack according to the embodiments of the present invention, the buffer material is disposed between the cell carrier and the frame, thereby absorbing vibration and impact.

[0028] In the battery pack and the battery pack manufacturing method according to the embodiment of the present invention, the column is formed integrally with the cell carrier and coupled to the frame, thereby preventing vibration from being transmitted through the column.

[0029] Another aspect of the present invention provides a battery pack manufactured using a battery array having an improved structure and a vehicle including the battery pack.

[0030] However, the effects obtainable by the present disclosure are not limited to the above effects, and other technical effects not mentioned will be clearly understood by those skilled in the art from the following description of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings attached to this specification illustrate some embodiments of the present disclosure, and together with the detailed description of the present disclosure, further describe aspects and features of the present disclosure. However, the present disclosure should not be interpreted as being limited to the accompanying drawings:

[0032] Figure 1 is a schematic top view of a battery pack according to one embodiment of the present invention;

[0033] Figure 2 is a schematic top view of a frame according to one embodiment of the present invention;

[0034] Figure 3 is a schematic exploded perspective view of a frame according to the embodiment;

[0035] Figure 4is a schematic perspective view of a frame according to the embodiment;

[0036] Figure 5 is a schematic diagram of a first frame according to an embodiment of the present invention;

[0037] Figure 6 is a schematic diagram of a second framework according to an embodiment of the present invention;

[0038] Figure 7 is a schematic diagram showing a monomer carrier according to a first embodiment of the present invention, the monomer carrier having a column integrally formed therewith;

[0039] Figure 8 is a schematic diagram showing a unitary carrier according to a second embodiment of the present invention, the unitary carrier having a column insert-molded therein;

[0040] Fig. 9 is a schematic diagram of a column according to a second embodiment;

[0041] Fig.10 is a schematic diagram of a first binding portion according to one embodiment of the present invention;

[0042] Fig.11 is a schematic diagram of a second binding portion according to one embodiment of the present invention;

[0043] Fig.12 is a schematic diagram of a cushioning material according to one embodiment of the present invention;

[0044] Fig.13 is a schematic flow chart of a method for manufacturing a battery pack according to one embodiment of the present invention;

[0045] Fig.14 is a schematic diagram showing a first bonding step according to one embodiment of the present invention;

[0046] Fig.15 is a schematic diagram showing a second combining step according to one embodiment of the present invention; and

[0047] Fig.16 is a schematic flow chart of a battery pack manufacturing method according to another embodiment of the present invention, in which a buffering step is added Fig.13 A method for manufacturing a battery pack. DETAILED DESCRIPTION

[0048] Here, some embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. The terms or words used in this specification and claims should not be interpreted as limited to the usual or dictionary meanings, but should be interpreted as meanings and concepts consistent with the technical ideas of the present disclosure based on the concept that the inventor may be his / her own lexicon compiler to appropriately define the term.

[0049] The embodiments described in this specification and the configurations shown in the accompanying drawings are provided as some example embodiments of the present disclosure and do not represent all technical ideas, aspects and features of the present disclosure. Therefore, it should be understood that when submitting this application, there may be various equivalents and modifications that can replace or modify the embodiments described herein.

[0050] It should be understood that when an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, it may be directly on, directly connected to, or coupled to the other element or layer, or one or more intermediate elements or layers may also be present. When an element or layer is referred to as being "directly on," "directly connected to," or "directly coupled to" another element or layer, there are no intermediate elements or layers. For example, when a first element is described as being "coupled to" or "coupled to" a second element, the first element may be directly coupled to or coupled to the second element, or the first element may be indirectly coupled to or coupled to the second element via one or more intermediate elements.

[0051] In the accompanying drawings, for the sake of clarity, the sizes of various elements, layers, etc. may be exaggerated. The same reference numerals represent the same or similar elements. As used herein, the term "and / or" includes any and all combinations of one or more related listed items. In addition, the use of "may" in describing the embodiments of the present disclosure relates to "one or more embodiments of the present disclosure". Expressions such as "at least one" and "any one", when before a column of elements, modify the entire column of elements without modifying the individual elements of the column. When phrases such as "at least one of A, B and C", "at least one of A, B or C", "at least one selected from the group of A, B and C" or "at least one selected from A, B and C" are used to specify a column of elements A, B and C, the phrase may refer to any and all suitable combinations or subsets of A, B and C, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the terms "use", "use of ..." and "used" may be considered to be synonymous with the terms "utilize", "utilize ..." and "utilize", respectively. As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation rather than terms of degree, and are intended to account for the inherent variations in measurements or calculations that those of ordinary skill in the art would recognize.

[0052] It should be understood that although the terms "first", "second", "third", etc. can be used here to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or part discussed below can be referred to as a second element, component, region, layer or part.

[0053] For ease of description, spatial relationship terms such as "below ... ", "below ... ", "below", "above ... ", "on", etc. can be used here to describe the relationship between an element or feature and another element or feature as shown in the figure. It should be understood that, in addition to the orientations depicted in the figure, the spatial relationship terms are intended to also cover other different orientations of the device in use or operation. For example, if the device in the figure is turned over, the element described as "below" or "below" other elements or features will be oriented "above" or "on" other elements or features. Therefore, the term "below ... " can cover both the above and below orientations. The device can be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relationship descriptors used here should be interpreted accordingly.

[0054] The terms used herein are intended to describe embodiments of the present disclosure and are not intended to limit the present disclosure. As used herein, the singular forms "one" and "an" are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "include", "includes ...", "includes" and / or "includes ...", when used in this specification, specify the existence of stated features, integers, steps, operations, elements and / or components, but do not exclude the existence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups.

[0055] In addition, any numerical range disclosed and / or quoted herein is intended to include all sub-ranges of the same numerical precision contained in the quoted range. For example, the range of "1.0 to 10.0" is intended to include all sub-ranges between the minimum value 1.0 and the maximum value 10.0 (including these two values), that is, all sub-ranges with a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limit listed here is intended to include all lower numerical limits contained therein, and any minimum numerical limit listed in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to modify this specification (including claims) to explicitly list any sub-ranges contained in the range explicitly listed here.

[0056] Referring to two compared elements, features, etc. as being "the same" may mean that they are "substantially the same." Thus, the phrase "substantially the same" may include situations with deviations that are considered low in the art, such as a deviation of 5% or less. In addition, when a parameter is referred to as being uniform over a given area, this may mean that it is uniform with respect to an average value.

[0057] Throughout the specification, unless otherwise specified, each element may be in the singular or in the plural.

[0058] When any element is referred to as being disposed (or positioned or placed) "above (or below)" or "on (or below)" a component, this may mean that the arbitrary element is placed in contact with the upper (or lower) surface of the component, and may also mean that another component may be interposed between the component and any element disposed (or positioned or placed) above (or below) the component.

[0059] Furthermore, it should be understood that when an element is referred to as being "coupled," "linked," or "connected" to another element, the elements may be directly "coupled," "linked," or "connected" to each other, or one or more intermediate elements may be present between them, through which the element may be "coupled," "linked," or "connected" to another element. Furthermore, when a part is referred to as being "electrically coupled" to another part, the part may be directly electrically connected to the other part, or one or more intermediate parts may be present between them, so that the part and the other part are indirectly electrically connected to each other.

[0060] Throughout the specification, unless otherwise specified, when "A and / or B" is stated, it means A, B, or A and B. That is, "and / or" includes any or all combinations of the listed multiple items. Unless otherwise specified, when "C to D" is stated, it means C or greater and D or less.

[0061] Figure 1 is a schematic top view of a battery pack according to one embodiment of the present invention. Figure 1 , the battery pack 1 according to this embodiment includes a cell carrier 10 , a frame 20 , a column 30 , and a coupling portion 40 .

[0062] The cell carrier 10 may hold an array of battery cells 100. Each battery cell 100 may have a cylindrical shape. The array of battery cells 100 may be inserted and coupled to the cell carrier 10. The cell carrier 10 may include an insulating material, preferably a resin material.

[0063] The frame 20 may be coupled to the monomer carrier 10 to enhance the rigidity of the monomer carrier 10. The frame 20 may have a rectangular band shape. The frame 20 may be composed of a single piece or a plurality of pieces joined together. The frame 20 may be formed of metal and may cover the outer surface of the monomer carrier 10. The monomer carrier 10 and the frame 20 may be coupled to each other by a separate fixing device.

[0064] The post 30 may be coupled to the cell carrier 10 and may pass through the frame 20. The post 30 may be coupled to other components in a subsequent battery pack assembly process. The post 30 may be formed of metal.

[0065] The coupling portion 40 may couple the frame 20 to the column 30. The coupling portion 40 may be a welding region for coupling between the frame 20 and the column 30. However, it should be understood that the present invention is not limited thereto, and the coupling portion 40 may couple the frame 20 to the column 30 using various methods other than welding.

[0066] Figure 2 is a schematic top view of a frame according to one embodiment of the present invention, Figure 3 is a schematic exploded perspective view of a frame according to this embodiment, Figure 4 is a schematic perspective view of a frame according to this embodiment. Figures 2 to 4 , the frame 20 according to this embodiment may include a first frame 21 and a second frame 22 .

[0067] The first frame 21 may cover the edge of the cell carrier 10 and may be coupled to the pillar 30. The second frame 22 may cover the edge of the cell carrier 10 and may be coupled to the first frame 21.

[0068] The first frame 21 includes a pair of first frames facing each other, the second frame 22 includes a pair of second frames facing each other, and the first frame 21 and the second frame 22 partially overlap each other. The overlapping parts of the first frame 21 and the second frame 22 can be combined with each other by welding. The first frame 21 and the second frame 22 can be alternately arranged along the periphery of the monomer carrier 10. After the first frame 21 is in close contact with the monomer carrier 10, the second frame 22 can be in close contact with the monomer carrier 10. The first frame 21 can move in the y-axis direction to allow the column 30 to pass through the first frame 21. The second frame 22 can move in the x-axis direction to overlap with the first frame 21.

[0069] Figure 5 is a schematic diagram of a first frame according to an embodiment of the present invention. Figure 5 The first frame 21 may include a first frame body 211 , a first frame extension 212 , and a first frame hole 213 .

[0070] The first frame body 211 may cover the first side surface 11 of the cell carrier 10. The first frame body 211 may correspond in length to the first side surface 11, and may face the first side surface 11. The first frame body 211 may be coupled to the cell carrier 10 by a separate fixing means.

[0071] The first frame extension 212 may extend from the first frame body 211 and may cover the second side surface 12 of the unit carrier 10. The first frame extension 212 may be bent at both ends of the first frame body 211 to face a portion of the second side surface 12.

[0072] A first frame hole 213 may be formed in the first frame body 211 to allow the column 30 to pass therethrough. The first frame hole 213 may have a size corresponding to the outer diameter of the column 30. When the first frame body 211 moves in the y-axis direction, after the column 30 passes through the first frame hole 213 in the first frame body 211, the first frame body 211 is in close contact with the first side surface 11.

[0073] Figure 6 is a schematic diagram of a second frame according to an embodiment of the present invention. Figure 6 The second frame 22 may include a second frame body 221 and a second frame extension 222 .

[0074] The second frame body 221 may cover the second side surface 12 of the unit carrier 10. The second frame body 221 may be coupled to the first frame extension 212. The second frame body 221 may correspond to the second side surface 12 in length and may face the second side surface 12. The second frame body 221 may be coupled to the unit carrier 10 by a separate fixing device.

[0075] The second frame extension 222 may extend from the second frame body 221 and may be coupled to the first frame body 211. The second frame extension 222 may be bent at both ends of the second frame body 221 to face the first frame body 211.

[0076] The second frame 22 may further include a second frame hole 223. The second frame hole 223 may be formed in the second frame extension 222 to prevent interference with the column 30. The second frame hole 223 may be formed at an end of the second frame extension 222 to have a predetermined length in the x-axis direction. In this way, when the second frame 22 moves in the x-axis direction to approach the second side surface 12, the column 30 may be inserted into the second frame hole 223.

[0077] Figure 7 is a schematic diagram showing a single body carrier according to a first embodiment of the present invention, the single body carrier having a column integrally formed therewith. Figure 7, the monomer carrier 10 and the column 30 may be formed integrally with each other. That is, the monomer carrier 10 and the column 30 may be integrally molded using the same material. Both the monomer carrier 10 and the column 30 may be formed of metal. The column 30 according to the first embodiment may include: a column close contact portion 31 protruding from the monomer carrier 10 and closely contacting the frame 20; and a column protrusion 32 extending from the column close contact portion 31 and passing through the frame 20.

[0078] Figure 8 is a schematic diagram showing a single body carrier having a column insert-molded therein according to a second embodiment of the present invention, Fig. 9 is a schematic diagram of a column according to a second embodiment. Figure 8 and Fig. 9 The column 30 including the metal material may be integrally formed with the single body carrier 10 including the resin material by insert injection molding. More specifically, the column 30 may include a column inserting portion 35 , a column combining portion 36 , and a column penetrating portion 37 .

[0079] The column insertion portion 35 may be insert-molded into the single body carrier 10. The column insertion portion 35 may be placed in a mold for forming the single body carrier 10, and may be covered by the single body carrier 10 during injection molding of the single body carrier 10. The column insertion portion 35 may include an insertion embedding portion 351 embedded in the single body carrier 10 and an insertion hole portion 352 formed in the insertion embedding portion 351 and allowing a resin material forming the single body carrier 10 to pass therethrough. The insertion embedding portion 351 may have a shape of a polygonal plate or disk, and the insertion hole portion 352 may include a plurality of insertion hole portions formed equidistantly along the insertion embedding portion 351.

[0080] The column coupling portion 36 may extend from the column insertion portion 35, may be exposed to the outside of the single body carrier 10, and may be coupled to the frame 20. The column coupling portion 36 may closely contact the inner surface of the first frame body 211. The column coupling portion 36 may have a shape of a polygonal plate or disk, which is smaller in size than the column insertion portion 35. A portion of the first frame body 211 may be recessed inwardly and protruded outwardly, thereby covering the column coupling portion 36.

[0081] The column penetration portion 37 may extend from the column coupling portion 36 and may pass through the frame 20. The column penetration portion 37 may pass through the first frame hole 213 and may be inserted into the second frame hole 223. The column penetration portion 37 may be assembled with other components during assembly of the battery pack.

[0082] Fig.10 is a schematic diagram of a first binding portion according to one embodiment of the present invention, Fig.11 Schematic diagram of a second binding portion according to one embodiment of the present invention. Fig.10 and Fig.11 , the bonding part 40 may include a first bonding part 41 and a second bonding part 42. The first bonding part 41 and the second bonding part 42 may be base materials for bonding objects to each other.

[0083] The first coupling portion 41 may couple the first frame 21 to the column 30 by welding. The column protrusion 32 according to the first embodiment or the column coupling portion 36 according to the second embodiment may be in face-to-face contact with the first frame body 211, and the first coupling portion 41 may couple the column protrusion 32 or the column coupling portion 35 to the first frame body 211.

[0084] The second coupling portion 42 may couple the first frame 21 to the second frame 22 by welding. After the first frame 21 is in close contact with the second frame 22, overlapping portions of the first frame 21 and the second frame 22 may be welded to each other. That is, the first frame body 211 and the second frame extension 222 may be coupled to each other by welding, and the first frame extension 212 and the second frame body 221 may be coupled to each other by welding.

[0085] Fig.12 Schematic diagram of a cushioning material according to one embodiment of the present invention. Fig.12 , the battery pack 1 according to one embodiment of the present invention may further include a buffer material 50 .

[0086] The buffer material 50 may be disposed between the cell carrier 10 and the frame 20 to absorb shock. The buffer material 50 may include an elastic damping material such as rubber or sponge. The buffer material 50 may be attached between the cell carrier 10 and the frame 20 by an adhesive. A gap space may be formed between each corner of the cell carrier 10 and the frame 20, and the buffer material 50 may be inserted into the gap space to absorb vibration or shock.

[0087] Fig.13 FIG. 1 is a schematic flow chart of a method for manufacturing a battery pack according to an embodiment of the present invention. Fig.13 A method of manufacturing a battery pack according to this embodiment is described.

[0088] In the insert molding step S10, the single body carrier 10 and the pillar 30 are formed by insert molding. First, a portion of the pillar 30 formed of metal is introduced into a mold for forming the single body carrier 10. After the pillar 30 is introduced into the mold, a molten resin is introduced into the mold. Then, the resin is solidified to obtain the single body carrier 10 in which the pillar 30 is partially inserted.

[0089] In the first coupling step S20, the pillar 30 may be coupled to the first frame 21 covering the first side surface 11 of the cell carrier 10. A portion of the pillar 30 protruding from the cell carrier 10 may be coupled to the first frame body 211 through the first coupling portion 41.

[0090] In the second combining step S30, the first frame 21 may be combined to the second frame 22 covering the second side surface 12 of the cell carrier 10. The first frame 21 and the second frame 22 facing each other may be combined with each other by the second combining part 42.

[0091] Fig.14 is a schematic diagram showing a first bonding step according to an embodiment of the present invention. Fig.14 The first combining step S20 is described in detail. The first combining step S20 may include a first moving step S21, a first close contact step S22, and a first bonding step S23.

[0092] In the first moving step S21, the first frame 21 is moved so that the column penetration portion 37 of the column 30 passes through the first frame 21. Fig. 9 When the first frame 21 is caught by a conveying device such as a robot and Figure 2 When moving in the y-axis direction of the first frame body 211, the column 30 passes through the first frame hole 213 formed in the first frame body 211 while remaining stationary.

[0093] In the first close contact step S22, the first frame 21 may be in close contact with the column coupling portion 36 of the column 30. The close contact between the column coupling portion 36 and the first frame body 211 may be detected by a separate pressure sensor or a position sensor. In the case of using a pressure sensor, when the pressure sensor detects a load applied to the conveying device when in close contact between the column coupling portion 36 and the first frame body 211, the movement of the conveying device may be stopped. In the case of using a position sensor, when the positions of the column coupling portion 36 and the first frame body 211 detected in real time by the position sensor match each other, the movement of the conveying device may be stopped. When the first frame 21 is in close contact with the column coupling portion 36, the first frame body 211 may cover the first side surface 11, and the first frame extension 212 may cover a portion of the second side surface 12.

[0094] In the first joining step S23, the first frame 21 and the column 30 may be joined to each other. Specifically, the adjoining surfaces of the first frame body 211 and the column coupling portion 36 may be joined to each other by laser spot welding. Here, a base material for welding may be provided between the first frame body 211 and the column coupling portion 36. However, it should be understood that the present invention is not limited thereto, and the first frame body 211 and the column coupling portion 36 may be joined to each other by various other joining methods.

[0095] Fig.15 Schematic diagram showing the second bonding step according to one embodiment of the present invention. Fig.15 The second combining step S30 is described in detail. The second combining step S30 may include a second close contacting step S31 and a second bonding step S32.

[0096] In the second close contact step S31, the second frame 22 may be in close contact with the first frame 21. Here, there may be no interference between the second frame 22 and the pillars 30 that have passed through the first frame 21. The second frame body 221 may be in close contact with the first frame 21. Figure 2 The second frame body 221 moves in the x-axis direction to face-to-face contact with the first frame extension 212. When the column penetration portion 37 is inserted into the second frame hole 223 formed in the second frame extension 222, smooth movement of the second frame body 221 can be achieved. The second frame extension 222 can face-to-face contact with the first frame body 211.

[0097] In the second joining step S32, the first frame 21 and the second frame 22 may be joined to each other. Specifically, the adjacent surfaces of the first frame body 211 and the second frame extension 222 may be joined to each other by laser spot welding, and the adjacent surfaces of the first frame extension 212 and the second frame body 221 may be joined to each other by laser spot welding. Here, a base material for welding may be provided between the first frame body 211 and the second frame extension 222. A base material for welding may also be provided between the first frame extension 212 and the second frame body 221. However, it should be understood that the present invention is not limited thereto, and the first frame 21 and the second frame 22 may be joined to each other by various other joining methods.

[0098] Fig.16 is a schematic flow chart of a battery pack manufacturing method according to another embodiment of the present invention, in which a buffering step is added Fig.13 A method for manufacturing a battery pack. Fig.16, the battery pack manufacturing method according to this embodiment may further include a buffering step. In the buffering step S40, a buffering material 50 for impact absorption may be provided between the cell carrier 10 and the first frame 21. A conveying device such as a robot may grasp and move the buffering material 50 to insert the buffering material 50 into a space between the first frame 21 and each corner of the cell carrier 10. The buffering step S40 may be performed after the first bonding step S20.

[0099] Although the present invention has been described with reference to the embodiments and the accompanying drawings showing aspects thereof, the present invention is not limited thereto. A person skilled in the art to which the present invention pertains may make various modifications and changes within the scope of the technical spirit of the present invention.

Claims

1. A battery pack comprising: A cell carrier, which holds the array of battery cells; a frame coupled to the single body carrier to enhance the rigidity of the single body carrier; a column, bound to the monomer support and passing through the framework; and A coupling portion couples the frame to the column.

2. The battery pack according to claim 1, wherein the frame comprises: a first frame covering the edges of the monolithic carrier and bonded to the column; and A second frame covers the edge of the single body carrier and is coupled to the first frame. 3 . The battery pack according to claim 2 , wherein the first frame includes a pair of first frames facing each other, the second frame includes a pair of second frames facing each other, and the first frame and the second frame partially overlap each other.

4. The battery pack according to claim 2, wherein the combining portion comprises: a first coupling portion for welding the first frame to the column; and The second combining portion is used to weld the first frame to the second frame.

5. The battery pack according to claim 2, wherein the first frame comprises: a first frame body, covering a first side surface of the monomer carrier; a first frame extension portion extending from the first frame body and covering a second side surface of the single body carrier; and A first frame hole is formed in the first frame body and allows the column to pass therethrough.

6. The battery pack according to claim 5, wherein the second frame comprises: a second frame body covering the second side surface of the single body carrier and coupled to the first frame extension; and A second frame extension portion extends from the second frame body and is coupled to the first frame body.

7. The battery pack according to claim 6, wherein the second frame further comprises: A second frame hole is formed at an end of the second frame extension and prevents interference with the column passing through the first frame hole. 8 . The battery pack according to claim 1 , wherein the cell carrier and the post are formed integrally with each other. 9 . The battery pack according to claim 1 , wherein the column comprising a metal material is integrally formed with the single body carrier comprising a resin material by insert injection molding.

10. The battery pack of claim 1, wherein the column comprises: a column insert portion, insert-molded into the monolithic carrier; a column-binding portion extending from the column-inserting portion, exposed outside the single-body carrier and coupled to the frame; and A column penetration portion extends from the column coupling portion and passes through the frame.

11. The battery pack according to claim 10, wherein the column insertion portion comprises: an insertion insertion portion embedded in the monomeric vector; and An insertion hole portion is formed in the insertion embedding portion.

12. The battery pack according to claim 1, further comprising: A cushioning material is disposed between the single body carrier and the frame to absorb impact.

13. A method for manufacturing a battery pack, comprising: an insert molding step, wherein a single body carrier and a column are formed by insert molding; a first bonding step, wherein the pillar is bonded to a first frame covering a first side surface of the monomer carrier; and a second bonding step in which the first frame is bonded to a second frame covering a second side surface of the unit carrier.

14. The method for manufacturing a battery pack according to claim 13, wherein the first combining step comprises: a first moving step, in which the first frame is moved so that the column penetrating portion of the column passes through the first frame; a first close contact step, wherein the first frame is in close contact with a column-combining portion of the column; and A first bonding step wherein the first frame is bonded to the column.

15. The method for manufacturing a battery pack according to claim 13, wherein the second combining step comprises: a second close contact step, wherein the second frame is in close contact with the first frame without interfering with the pillar; and A second joining step, wherein the first frame is joined to the second frame.

16. The method for manufacturing a battery pack according to claim 13, further comprising: A cushioning step, wherein a cushioning material for shock absorption is provided between the single body carrier and the first frame.

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