Battery pack

Abstract

The disclosed invention relates to a battery pack, which in one example includes a base plate, side plates coupled along the edge of the base plate to form an accommodation space therein, a cross beam coupled to the base plate to horizontally divide the accommodation space inside the base plate, and a plurality of battery cell assemblies mounted in the accommodation space divided by the cross beam, wherein the battery cell assemblies have side frames fixed to the cross beam, and the side frames of adjacent battery cell assemblies along the vertical direction share the upper surface of the cross beam located therebetween and do not overlap each other vertically.

Description

[Technical Field]

[0001] The present invention relates to a battery pack, and more particularly to a battery pack that can extend its lifespan with minimal maintenance by enabling replacement of a battery cell when a problem occurs in the battery cell among a plurality of battery cells mounted in the battery pack, without the need to discard the entire battery pack.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0046089, filed April 7, 2023, and all contents disclosed in the documents of said Korean patent application are incorporated herein by reference. [Background technology]

[0003] To improve the space utilization rate of a battery pack, a battery pack with a cell-to-pack structure has been proposed. The cell-to-pack structure has the advantage of improving the space utilization rate of the battery pack by directly assembling multiple battery cells into a battery pack without the need for a modular structure.

[0004] In the cell-to-pack structure, a new structure has been proposed for efficiently mounting a large number of battery cells in a pack case by eliminating or simplifying a separate module housing. For example, a structure can be designed in which a side frame is attached to a battery cell assembly (corresponding to a conventional battery module) in which multiple battery cells form a group, and the side frame of the battery cell assembly is fixed to the cross beam of the pack case.

[0005] Alternatively, the side frames of adjacent battery cell assemblies can be stacked one on top of the other and fixed to the base plate, thereby acting as a pack cross beam (meaning a cross beam provided in a pack case).Thermal resin can be interposed between the bottom of the battery cell assembly, where the battery cells are exposed, and the base plate of the pack case to promote conductive heat dissipation from the battery cell assemblies and to more firmly fix the battery cell assemblies as the thermal resin hardens.

[0006] However, a battery pack structure that uses the side frames of the battery cell assembly to omit the construction of a pack cross beam and further fixes the battery cell assembly through the curing of thermal resin has many advantages in terms of a cell-to-pack structure, such as improving the space utilization rate of the battery pack by directly assembling multiple battery cells into a battery pack without a modular structure, but has disadvantages in terms of battery pack maintenance. That is, this cell-to-pack structure makes it very difficult to disassemble an assembled battery pack into individual battery cell assemblies.

[0007] For example, a cell-to-pack structure in which the side frames of adjacent battery cell assemblies are stacked one above the other and fixed to the base plate can only be disassembled by removing the battery cell assemblies one by one in the reverse order of assembly. Furthermore, a structure in which the bottom of the battery cell assembly is fixed by hardening thermal resin can cause damage to the battery cells bonded to the thermal resin when the battery cell assembly is removed, which can lead to dangerous consequences such as electrolyte leakage.

[0008] There is a strong need for the development of a battery pack with a cell-to-pack structure that allows a battery pack to be easily disassembled into individual battery cells, and therefore allows maintenance of the battery pack by replacing the battery cell even if a problem occurs in only one battery cell in the battery pack, thereby enabling expensive battery packs to be utilized to the end of their designed lifespan without being discarded. Summary of the Invention [Problem to be solved by the invention]

[0009] An object of the present invention is to provide a battery pack having a cell-to-pack structure in which any battery cell assembly can be easily removed regardless of the assembly order, thereby facilitating the replacement of a defective battery cell.

[0010] However, the technical problems that the present invention aims to solve are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention described below. [Means for solving the problem]

[0011] The present invention relates to a battery pack, which in one example includes a base plate, side plates coupled along the edge of the base plate to form an internal storage space, a cross beam coupled to the base plate to horizontally divide the internal storage space of the base plate, and a plurality of battery cell assemblies mounted in the storage space divided by the cross beam, wherein the battery cell assemblies have side frames fixed to the cross beam, and the side frames of adjacent battery cell assemblies along the vertical direction share an upper surface of the cross beam located therebetween and do not overlap each other vertically.

[0012] In one embodiment, the side frame includes a side plate that surrounds the side of the battery cell assembly and a support block that protrudes from the side plate, and the support blocks of adjacent battery cell assemblies along the vertical direction occupy areas on the top surface of the cross beam that do not overlap each other.

[0013] The side frame may include a plurality of support blocks spaced apart from one another, and the support blocks of adjacent battery cell assemblies along the longitudinal direction may be arranged alternately with respect to the upper surface of the cross beam.

[0014] The battery cell assembly may then be fixed to the cross beam by bolts that are supported by passing vertically through the support blocks.

[0015] In some embodiments, the base plate may further include a center beam coupled to the base plate so as to vertically divide the storage space inside the base plate, thereby allowing the storage space to be arranged in a grid pattern by the cross beams and center beam.

[0016] Meanwhile, in some embodiments of the present invention, a clip band may be further included that is coupled to the side plate of the side frame to support bottom surfaces of the plurality of battery cells that make up the battery cell assembly.

[0017] The clip band includes a band body that supports the bottom surfaces of the plurality of battery cells and binding portions that are bent and erected at both ends of the band body, the binding portions having snap pins that are cut and bent, and the side plates of the side frame may have snap grooves that engage with the snap pins.

[0018] The snap pin is inclined downward relative to the side plate, and the fastening between the clip band and the side frame can have a snap-fit structure that is not separated by the load of the plurality of battery cells.

[0019] A groove is provided on the side surface of the cross beam, and the binding portion of the clip band can be inserted into the groove.

[0020] A paste-like gap filler may be interposed on the contact surface between the bottom surface of the battery cell assembly and the base plate, and the paste-like gap filler may be a non-hardening material.

[0021] Meanwhile, the present invention provides a method for manufacturing a battery pack, including: a first step of preparing a pack case including a base plate, side plates coupled to the edge of the base plate to form an accommodating space therein, and a cross beam coupled to the base plate to horizontally partition the accommodating space inside the base plate; a second step of inserting clip bands into grooves formed on the side surfaces of the cross beam; and a third step of mounting battery cell assemblies one by one in each of a plurality of accommodating spaces partitioned by the cross beam.

[0022] After the second step, the method may further include a 2-1 step of applying a paste gap filler onto the base plate, where the paste gap filler may be a non-hardened material.

[0023] The battery cell assembly has a side frame fixed to the cross beam, and the side frames of adjacent battery cell assemblies along the vertical direction share the upper surface of the cross beam located therebetween and do not overlap each other vertically.

[0024] For example, the side frame may include a side plate that surrounds the side of the battery cell assembly and a support block that protrudes from the side plate, and the support blocks of adjacent battery cell assemblies along the vertical direction may occupy areas on the top surface of the cross beam that do not overlap each other.

[0025] The third step may be to fix the battery cell assembly to the cross beam by bolts that are supported by vertically passing through the support blocks.

[0026] The clip band includes a band body that supports the bottom surfaces of the plurality of battery cells and binding portions that are bent and erected at both ends of the band body, the binding portions having snap pins that are cut and bent, and the side plates of the side frame may have snap grooves that engage with the snap pins.

[0027] The snap pin is inclined downward relative to the side plate, and the fastening between the clip band and the side frame can form a snap-fit structure that is not separated by the weight of the plurality of battery cells, so that the clip band can support the bottom surfaces of the plurality of battery cells that make up the battery cell assembly when the battery cell assembly is removed. [Effects of the Invention]

[0028] In the battery pack of the present invention having the above-described configuration, the side frames of adjacent battery cell assemblies are fixed to the cross beam, and the side frames of each battery cell assembly share the top surface of one cross beam but do not overlap each other vertically. As a result, even if a problem occurs in only one battery cell in an assembled battery pack, the problematic battery cell assembly can be easily removed regardless of the assembly order, and battery pack maintenance can be performed by replacing the battery cell, allowing expensive battery packs to be used to the end of their designed lifespan without being discarded.

[0029] Furthermore, when a gap filler is interposed in the contact surface between the bottom surface of the battery cell assembly and the base plate, the gap filler may be a non-hardening paste-like gap filler. The non-hardening gap filler eliminates the risk of damage to the battery cells due to hardened gap filler when the battery cell assembly is removed, thereby allowing for the freedom to replace any defective battery cells.

[0030] However, the technical effects that can be obtained by the present invention are not limited to the effects described above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0031] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention described below, serve to further understand the technical concept of the present invention, and therefore the present invention should not be interpreted as being limited solely to the matters depicted in such drawings. [Brief explanation of the drawings]

[0032] [Figure 1] 1 is a perspective view of a battery pack according to the present invention; [Figure 2] 1 is a diagram showing a pack case. [Figure 3] 1 is a view showing a battery cell assembly with a cross beam interposed therebetween. [Figure 4] FIG. 2 is a plan view of the battery pack of FIG. 1. [Figure 5] 10 is a diagram showing a structure in which a clip band is arranged on a pack case. [Figure 6] 10 is a view showing a structure in which a clip band is engaged with a battery cell assembly; [Figure 7] 10 is a cross-sectional view showing a structure in which a battery cell assembly is fastened to a clip band disposed in a pack case. FIG. [Figure 8] 1 is a view showing a structure in which battery cell assemblies are mounted along the vertical direction of a pack case. [Figure 9] 10 is a diagram showing a structure for removing one battery cell assembly from a pack case. DETAILED DESCRIPTION OF THE INVENTION

[0033] Because the present invention is susceptible to various modifications and can have various embodiments, specific embodiments will be described in detail below.

[0034] However, this is not intended to limit the invention to any particular embodiment, but rather to be understood as including all modifications, equivalents, or alternatives falling within the spirit and scope of the invention.

[0035] In the present invention, terms such as "comprise" and "have" are intended to specify the presence of features, numbers, steps, operations, components, parts or combinations thereof described in the specification, and may be understood as not precluding the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0036] Furthermore, in the present invention, when a layer, film, region, plate, or other portion is described as being "on" another portion, this includes not only the case where it is "directly on" the other portion, but also the case where there is another portion therebetween. Conversely, when a layer, film, region, plate, or other portion is described as being "under" the other portion, this includes not only the case where it is "directly under" the other portion, but also the case where there is another portion therebetween. Furthermore, in this application, being "located on" can include not only the case where it is located at the top, but also the case where it is located at the bottom.

[0037] The present invention relates to a battery pack, which in one example includes a base plate, side plates coupled along the edge of the base plate to form an internal storage space, a cross beam coupled to the base plate to horizontally divide the internal storage space of the base plate, and a plurality of battery cell assemblies mounted in the storage space divided by the cross beam, wherein the battery cell assemblies have side frames fixed to the cross beam, and the side frames of adjacent battery cell assemblies along the vertical direction share an upper surface of the cross beam located therebetween and do not overlap each other vertically.

[0038] Also, the paste-like gap filler interposed at the contact surface between the bottom surface of the battery cell assembly and the base plate may be a non-hardening material.

[0039] In such a battery pack of the present invention, the side frames of adjacent battery cell assemblies with a cross beam between them are fixed to the cross beam, and the side frames of each battery cell assembly share the upper surface of one cross beam but do not overlap each other vertically.

[0040] Therefore, even if a problem occurs in only one battery cell in a battery pack that has been assembled, the problematic battery cell assembly can be easily removed regardless of the assembly order, and the battery pack can be maintained by replacing the battery cell, allowing the expensive battery pack to be used to the end of its designed lifespan without being discarded.

[0041] Here, when a gap filler is interposed at the contact surface between the bottom surface of the battery cell assembly and the base plate, the gap filler may be a non-hardening paste-like gap filler. The non-hardening gap filler eliminates the risk of damage to the battery cells due to hardened gap filler when the battery cell assembly is removed, thereby allowing for the freedom to replace defective battery cells.

[0042] Hereinafter, specific embodiments of the battery pack 10 according to the present invention will be described in detail with reference to the accompanying drawings. For reference, the directions of front, back, up, down, left, and right used in the following description to designate relative positions are intended to facilitate understanding of the invention, and unless otherwise specified, are based on the directions shown in the drawings.

[0043] (First embodiment) FIG. 1 is a perspective view of a battery pack 10 according to the present invention, FIG. 2 is a view showing a pack case 100, and FIG. 3 is a view showing a battery cell assembly 200 with a cross beam 130 interposed therebetween.

[0044] 1 to 3, a pack case 100 forming the main body of a battery pack 10 includes a base plate 110, side plates 120 coupled along the edges of the base plate 110 to form an accommodating space therein, and a cross beam 130 coupled to the base plate 110 to horizontally divide the accommodating space inside the base plate 110. In some embodiments, as shown in FIG. 2 attached herewith, the pack case 100 may further include a center beam 140 coupled to the base plate 110 to vertically divide the accommodating space inside the base plate 110, whereby the accommodating space of the pack case 100 may be arranged in a grid pattern by the cross beam 130 and the center beam 140.

[0045] One battery cell assembly 200 is mounted in each of the storage spaces partitioned by the cross beam 130, thereby allowing the battery pack 10 to accommodate a plurality of battery cell assemblies 200 to fulfill its design capacity. Referring to Figure 3, the battery cell assembly 200 includes a plurality of battery cells 210 and a bus bar frame assembly 220 that mechanically and electrically couples to the plurality of battery cells 210 at both lateral ends from which the leads (not shown) of the battery cells 210 protrude. The battery cell assembly 200 also includes side frames 230 on both longitudinal ends that protect the battery cells 210.

[0046] 4 is a plan view of the battery pack 10, and when viewed together with FIG. 3, the side frames 230 of adjacent battery cell assemblies 200 along the vertical direction share the upper surface of the cross beam 130 located therebetween and do not overlap one another vertically. For example, in the illustrated embodiment, the side frames 230 include side plates 232 that surround the sides of the battery cell assemblies 200 and support blocks 236 that protrude relative to the side plates 232, and the support blocks 236 of adjacent battery cell assemblies 200 along the vertical direction occupy areas on the upper surface of the cross beam 130 that do not overlap one another.

[0047] Describing the side frame 230 of the configuration of the battery cell assembly 200 in more detail, the support block 236 of the side frame 230 is a protruding member that supports and secures the battery cell assembly 200 to the cross beam 130. The support block 236 is seated on the upper surface of the cross beam 130 to support the battery cell assembly 200. The battery cell assembly 200 is secured to the cross beam 130 by a bolt 240 that passes vertically through the support block 236. The head of the bolt 240, which has a larger diameter, is supported in the entrance of a through-hole 238, so that the fastening force of the bolt 240 acts on the battery cell assembly 200. Here, as shown in FIG. 3, the entrance of the through-hole 238 may be positioned downward and spaced apart from the upper surface of the support block 236 to prevent the head of the bolt 240 from protruding to the outside.

[0048] 4 shows the structure in which all battery cell assemblies 200 are installed within the battery pack 10. Vertically adjacent battery cell assemblies 200 are supported and fixed by the cross beam 130 between them. For this reason, the support blocks 236 of vertically adjacent battery cell assemblies 200 occupy non-overlapping areas on the top surface of the cross beam 130. For example, the support blocks 236 of vertically adjacent battery cell assemblies 200 may be arranged alternately with respect to the top surface of the cross beam 130.

[0049] As shown in the plan view of Figure 4, the side frames 230, particularly the support blocks 236, of adjacent battery cell assemblies 200 with a cross beam 130 between them share the top surface of one cross beam 130 but do not overlap one another vertically. As a result, even if a problem occurs in only one battery cell 210 within an assembled battery pack 10, the problematic battery cell assembly 200 can be easily removed upward without any interference, regardless of the assembly order. In this way, the battery pack 10 of the present invention allows for maintenance of the battery pack 10 by replacing a defective battery cell 210 or battery cell assembly 200, thereby enabling the expensive battery pack 10 to be utilized to its designed lifespan without having to be discarded altogether.

[0050] In addition, depending on the embodiment, a gap filler may be interposed in the contact surface between the bottom surface of the battery cell assembly 200 and the base plate 110. The gap filler fills gaps (caused by surface roughness, flatness, etc.) that exist between the bottom surface of the battery cell assembly 200 and the base plate 110, thereby promoting heat conduction between them, and has a thermal conductivity above a certain level for smooth heat conduction.

[0051] The battery pack 10 of the present invention preferably uses a non-hardening, paste-like gap filler 150 that does not harden. For example, the paste-like gap filler 150 used in the present invention may have properties that do not harden over the lifespan or service warranty period of the battery pack 10, despite temperature fluctuations due to the passage of time or repeated charging and discharging. Such a non-hardening gap filler eliminates the risk of damage to the battery cells 210 due to hardened gap filler when the battery cell assembly 200 is removed, thereby ensuring that problematic battery cells 210 can be easily replaced. An example of such a paste-like gap filler 150 is the gap filler under the trade name "TGF 3010 APS" manufactured by Henkel AG & Co. KGaA, headquartered in Düsseldorf, Germany.

[0052] (Second embodiment) The second embodiment of the present invention relates to a battery pack 10 including a configuration that assists in stably extracting a heavy battery cell assembly 200 when removing the battery cell assembly 200 including a defective battery cell 210.

[0053] The battery pack 10 according to the second embodiment further includes a clip band 300 coupled to the side plate 232 of the side frame 230 to support the bottom surfaces of the plurality of battery cells 210 that make up the battery cell assembly 200. The clip band 300, which maintains the binding state to the side frame 230, supports the bottom surfaces of all of the plurality of battery cells 210 that make up the battery cell assembly 200, thereby preventing problems such as the battery cells 210 separating or falling even if the battery cell assembly 200 is detached from the base plate 110.

[0054] In particular, the battery pack 10 of the present invention is suitable for being configured as a battery pack 10 with a cell-to-pack structure in which the structure of the battery cell assembly 200 is simplified without a separate module housing surrounding the plurality of battery cells 210, and the clip band 300 can be said to be a configuration that is useful for maintenance of the battery pack 10 with a cell-to-pack structure.

[0055] 5 is a diagram showing a structure in which a clip band 300 is disposed in a pack case 100, and FIG. 6 is a diagram showing a structure in which the clip band 300 fastens to a battery cell assembly 200. The clip band 300 in the illustrated embodiment includes a band body 310 that supports the bottom surfaces of a plurality of battery cells, and fastening portions 320 that are bent and erected at both ends of the band body 310. The fastening portions 320 at both ends are fastened to the side frames 230, thereby securing the clip band 300 to the battery cell assembly 200.

[0056] 5, the clip band 300 is attached to the pack case 100, and can be configured to automatically fasten to the side frame 230 of the battery cell assembly 200 when the battery cell assembly 200 is placed inside the pack case 100. By preparing the clip band 300 integrally with the pack case 100, the manufacturing process of the pack case 100 can be completed in a unified manner, separate from the process of preparing the battery cell assembly 200. Another advantage is that there is no need to apply gap filler to the clip band 300, which can save on expensive gap filler for the area of the base plate 110 occupied by the clip band 300.

[0057] When the battery cell assembly 200 is stored in the pack case 100, the clip band 300 is automatically fastened to the side frame 230 of the battery cell assembly 200. Furthermore, to ensure that the fastened state of the clip band 300 is maintained when the battery cell assembly 200 is removed, as shown in FIG. 6 , the binding portions 320 at both ends of the clip band 300 are cut into a U-shape and then bent inward to include snap pins 322, and the side plates 232 of the side frame 230 may be formed with snap grooves 234 into which the snap pins 322 engage.

[0058] Figure 7 is a cross-sectional view showing the structure in which a battery cell assembly 200 is fastened to a clip band 300 arranged in a pack case 100. The battery cell assembly 200 on the left side of Figure 7 is in a state in which it is being attached to the pack case 100, and because the snap pin 322 of the fastening part 320 is inclined downward relative to the side plate 232, the snap pin 322 is pressed by the side plate 232 of the battery cell assembly 200 moving downward, and naturally enters the snap groove 234 while undergoing elastic deformation.

[0059] 7, which has already been installed in the pack case 100, when an upward pulling force is applied, the free end of the downwardly inclined snap pin 322 comes into contact with the wall of the snap groove 234, providing resistance, causing the battery cell assembly 200 to separate from the base plate 110 while maintaining the fastening state of the clip band 300. In other words, the connection between the clip band 300 and the side frame 230 is a snap-fit structure that automatically fastens when a downward load is applied, but does not separate when a load is applied to multiple battery cells.

[0060] In order to allow the clip band 300 to be positioned accurately at a predetermined position in the pack case 100, a groove 132 may be provided on the side of the cross beam 130, as shown in Figure 5, and the binding portion 320 of the clip band 300 may be configured to be inserted into the groove 132.

[0061] (Third embodiment) In the third embodiment of the present invention, a method for manufacturing the above-mentioned battery pack 10 will be described.

[0062] A manufacturing method of a battery pack 10 according to the present invention includes a first step of preparing a pack case 100 as shown in FIG. 2, which includes a base plate 110, side plates 120 coupled along the edges of the base plate 110 to form an accommodating space therein, and cross beams 130 coupled to the base plate 110 to horizontally partition the accommodating space inside the base plate.

[0063] Then, in the second step, as shown in Figure 5, the clip band 300 is inserted into the groove 132 formed on the side of the cross beam 130, thereby preparing the pack case 100 and the clip band 300 as a single unit.

[0064] Here, after the second step, a second-1 step of applying a paste gap filler 150 onto the base plate 110 may be further included. The paste gap filler 150 may be applied onto the exposed base plate 110, avoiding the clip band 300, and it is preferable that the paste gap filler 150 is a material that does not harden for a sufficiently long period of time.

[0065] In the third step, the battery cell assemblies 200 are mounted one by one into each of the plurality of storage spaces partitioned by the cross beam 130. The mounted battery cell assemblies 200 have side frames 230 fixed to the cross beam 130, and the side frames 230 of adjacent battery cell assemblies 200 in the vertical direction share the upper surface of the cross beam 130 located between them and do not overlap each other vertically. As a result, as shown in Figures 8 and 9, the battery pack 10 of the present invention does not require a specific mounting order for the plurality of battery cell assemblies 200, and further, when removing any battery cell assembly 200, only that battery cell assembly 200 can be released from its fixed state and pulled out upward.

[0066] In one embodiment, the side frame 230 includes side plates 232 that surround the sides of the battery cell assemblies 200 and support blocks 236 that protrude from the side plates 232, and the support blocks 236 of adjacent battery cell assemblies 200 along the vertical direction can occupy areas on the top surface of the cross beam 130 that do not overlap each other. Then, in a third step, the individual battery cell assemblies 200 can be fixed to the cross beam 130 by bolts 240 that are supported by vertically passing through the support blocks 236.

[0067] The clip band 300 includes a band body 310 that supports the bottom surfaces of multiple battery cells, and binding portions 320 that are bent and raised at both ends of the band body 310, and the binding portions 320 have snap pins 322 that are cut and bent, and the side plates 232 of the side frame 230 may have snap grooves 234 that engage with the snap pins 322.

[0068] The snap pins 322 are inclined downward relative to the side plate 232, and the fastening between the clip band 300 and the side frame 230 can form a snap-fit structure that is not separated by the weight of the multiple battery cells. As a result, the clip band 300 can support the bottom surfaces of the multiple battery cells 210 that make up the battery cell assembly 200 when the battery cell assembly 200 is removed.

[0069] The present invention has been described in more detail above through the drawings and embodiments, etc. However, the configurations described in the drawings or embodiments in this specification are merely one embodiment of the present invention and do not represent all of the technical ideas of the present invention, and therefore, there may be various equivalents and modifications that can replace them at the time of filing this application. [Explanation of symbols]

[0070] 10: Battery pack 100: Pack case 110: Base plate 120: Side plate 130: Cross beam 132: Groove 140: Center beam 150: Paste-type gap filler 200: Battery cell assembly 210: Battery cell 220: Busbar frame assembly 230: Side frame 232: Side plate 234: Snap groove 236: Support block 238:Through hole 240: Bolt 300: Clip band 310: Band body 320: Binding part 322: Snap pin

Claims

1. A base plate and a side plate coupled to the base plate along an edge thereof to form an accommodation space therein; a cross beam coupled to the base plate so as to laterally divide an inner storage space of the base plate; a plurality of battery cell assemblies mounted in an accommodating space defined by the cross beam; the battery cell assembly includes a side frame fixed to the cross beam; A battery pack in which side frames of battery cell assemblies adjacent along the longitudinal direction share the upper surface of the cross beam located therebetween and do not overlap each other vertically.

2. The side frame is a side plate surrounding a side of the battery cell assembly; and a support block protruding from the side plate, The battery pack according to claim 1 , wherein the support blocks of adjacent battery cell assemblies along the longitudinal direction occupy areas on the top surface of the cross beam that do not overlap each other.

3. The side frame includes a plurality of support blocks spaced apart from one another, The battery pack according to claim 2 , wherein the support blocks of the battery cell assemblies adjacent in the longitudinal direction are arranged alternately with respect to the upper surface of the cross beam.

4. The battery cell assembly includes:

3. The battery pack of claim 2, wherein the battery pack is secured to the cross beam by bolts that extend vertically through the support blocks.

5. a center beam coupled to the base plate to vertically define an inner storage space of the base plate; The battery pack according to claim 1 , wherein the cross beams and the center beam form a grid-like arrangement of the accommodating spaces.

6. The battery pack according to claim 2 , further comprising a clip band coupled to a side plate of the side frame to support bottom surfaces of the plurality of battery cells constituting the battery cell assembly.

7. The clip band is a band body supporting bottom surfaces of the plurality of battery cells; and binding portions bent and erected at both ends of the band body, the binding portions including snap pins that are cut and bent; The battery pack according to claim 6 , wherein the side plates of the side frames are provided with snap grooves into which the snap pins engage.

8. the snap pin is inclined downward relative to the side plate; The battery pack according to claim 7 , wherein the fastening between the clip band and the side frame forms a snap-fit structure that is not separated by the load of the plurality of battery cells.

9. The cross beam has grooves on its side, The battery pack according to claim 7 , wherein the binding portion of the clip band is inserted into the groove.

10. a paste-like gap filler is interposed on a contact surface between a bottom surface of the battery cell assembly and the base plate; 10. The battery pack of claim 1, wherein the paste-like gap filler is a non-hardened material.

11. a first step of preparing a pack case including a base plate, side plates coupled to the base plate along edges thereof to form an internal storage space, and cross beams coupled to the base plate so as to laterally partition the internal storage space of the base plate; a second step of inserting a clip band into a groove formed in a side surface of the cross beam; and a third step of mounting battery cell assemblies one by one in each of the plurality of accommodation spaces partitioned by the cross beam.

12. After the second step, The method further includes a step 2-1 of applying a gap filler paste onto the base plate, The method for manufacturing a battery pack according to claim 11 , wherein the paste-like gap filler is a non-hardened material.

13. the battery cell assembly includes a side frame fixed to the cross beam; The method for manufacturing a battery pack according to claim 11 , wherein the side frames of adjacent battery cell assemblies along the longitudinal direction share an upper surface of the cross beam located therebetween and do not overlap each other vertically.

14. The side frame is a side plate surrounding a side of the battery cell assembly; and a support block protruding from the side plate, The method for manufacturing a battery pack according to claim 13 , wherein the support blocks of vertically adjacent battery cell assemblies occupy non-overlapping areas on the top surface of the cross beam.

15. The third step is The method for manufacturing a battery pack according to claim 14 , wherein the battery cell assemblies are fixed to the cross beam by bolts that are supported by vertically passing through the support blocks.

16. the battery cell assembly includes a side frame fixed to the cross beam; The clip band is a band body supporting bottom surfaces of the plurality of battery cells constituting the battery cell assembly; and binding portions bent and erected at both ends of the band body, the binding portions having snap pins that are cut and bent; The method for manufacturing a battery pack according to claim 11 , wherein the side plates of the side frames are provided with snap grooves into which the snap pins are engaged.

17. the snap pin is inclined downward relative to the side plate; the fastening between the clip band and the side frame has a snap-fit structure that is not separated by the load of the plurality of battery cells; The method of manufacturing a battery pack according to claim 16 , wherein the clip band supports bottom surfaces of the plurality of battery cells that constitute the battery cell assembly when the battery cell assembly is removed.

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