Cell stack assembly and battery pack including the above cell stack assembly

Abstract

The present invention relates to a cell stack assembly including a cell stack in which a plurality of battery cells are stacked, bus bar frames including bus bars electrically connected to the battery cells and closely coupled to front and rear ends of the cell stack, end plates coupled to the bus bar frames to cover the bus bars, and support blocks coupled to both side surfaces of the end plates to cover one side of a battery cell located at the outermost edge of the cell stack, and a battery pack including the cell stack assembly.

Description

Technical Field

[0001] The present invention relates to a cell stack assembly in which a plurality of battery cells are stacked and included, and a battery pack including the cell stack assembly. More specifically, the present invention removes a partition wall for partitioning the cell stack assembly from the battery pack, and uses a support block configuration that can replace the partition wall, thereby enhancing the utilization of the internal space of the battery pack.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0053655 filed on April 29, 2022, and all the contents disclosed in the literature of the Korean patent application are included as part of this specification.

Background Art

[0003] Types of secondary batteries currently widely used include lithium-ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, nickel zinc batteries, etc. The operating voltage of such a unit secondary battery cell, that is, a unit battery cell, is about 2.5V to 4.5V. Therefore, when a higher output voltage is required, a plurality of battery cells may be connected in series to form a battery pack. Also, depending on the charge / discharge capacity required for the battery pack, a large number of battery cells may be connected in parallel to form a battery pack. Therefore, the number of battery cells included in the battery pack can be variously set according to the required output voltage or charge / discharge capacity.

[0004] On the other hand, when a battery pack is configured by connecting a plurality of battery cells in series / parallel, it is common to first configure a battery module including at least one battery cell, and then add other components using such at least one battery module to configure a battery pack.

[0005] Conventional battery modules typically include at least one cell stack containing battery cells, and a metal housing structure in the form of a box, i.e., a module frame, that houses such at least one cell stack. Such conventional battery module structures have the problem that the weight and volume of the module frame itself reduce the energy density of the overall battery pack and increase the overall weight of the battery pack.

[0006] Due to the problems described above, we have attempted to eliminate the conventional module frame configuration that encloses and protects the cell stack, and instead try a method of housing and arranging the cell stack in a battery pack only in a configuration in which the busbar frame and end plate are attached to the front and rear surfaces where the electrode leads are formed, respectively.

[0007] Figure 1 is a perspective view of a cell stack assembly with the module frame removed, including the cell stack, busbar frame, and end plates. However, a cell stack assembly with a structure like that shown in Figure 1 presents problems in that it is difficult to handle and not easy to secure inside a battery pack.

[0008] Therefore, there is a need to explore ways to provide a cell stack assembly that is easy to fix and handle, and a battery pack that includes such a cell stack assembly, by reducing the overall weight through weight reduction, thereby increasing energy density. [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] Therefore, the present invention aims to increase the utilization rate of space inside the battery pack by eliminating the conventional module frame.

[0010] Furthermore, the present invention aims to provide a structure that can support a cell stack in which multiple battery cells are stacked without a module frame, and that can connect and fix the cell stack to a battery pack.

[0011] Furthermore, the present invention aims to provide a structure that can connect and fix multiple cell stacks together.

[0012] Other objects and advantages of the present invention can be understood from the following description and will be more clearly evident from the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof as described in the claims. [Means for solving the problem]

[0013] The present invention provides a cell stack assembly comprising: a cell stack in which a plurality of battery cells are stacked; a busbar frame that includes a busbar electrically connected to the battery cells and is tightly coupled to the front and rear of the cell stack; an end plate that is coupled to the busbar frame so as to cover the busbar; and support blocks that are coupled to both sides of the end plate so as to cover one side of the battery cell located at the outermost edge of the cell stack, wherein the support blocks include fastening grooves at the top and bottom.

[0014] Multiple fastening grooves may be formed along the longitudinal direction of the support block at predetermined intervals.

[0015] The support blocks located on both sides of the cell stack may each include fastening grooves at positions opposite to each other.

[0016] The present invention further includes a cover coupled to the support block so as to cover at least one of the open upper and lower portions of the cell stack, the cover may include through holes in the portion coupled in contact with the support block that correspond to fastening grooves of the support block.

[0017] The support block and cover can be screw-connected by bolts that pass through the through-holes and are inserted into the fastening grooves.

[0018] The present invention provides a battery pack comprising the cell stack assembly described above and a pack case in which a plurality of the cell stack assemblies are arranged, wherein the cell stack assembly is arranged such that at least one support block is in contact with one surface of a support block of an adjacent cell stack assembly.

[0019] The pack case includes a bottom hole formed through the bottom corresponding to the position of fastening grooves formed at the bottom of the cell stack assembly, and the cell stack assembly can be coupled to the pack case by bolts inserted into the fastening grooves and the bottom hole.

[0020] The pack case further includes a fixing member that is coupled to a support block of each cell stack assembly to secure at least two cell stack assemblies arranged in the pack case, the fixing member includes a fixing hole formed through to a position corresponding to a fastening groove of each support block, and the fixing member can be screw-coupled to the support block by bolts inserted into the fixing hole and the fastening groove corresponding to the fixing hole.

[0021] The above-mentioned fixing member can be connected at both ends to two adjacent support blocks, thereby fixing the pair of cell stack assemblies.

[0022] The fixing member is formed to extend along the longitudinal direction of two adjacent support blocks, and the fixing holes may be formed spaced apart along the longitudinal direction of the fixing member so as to correspond to the fastening grooves of each support block.

[0023] The fixing member described above is formed to extend in the width direction of the support block to fix a plurality of cell stack assemblies and can be connected to at least four support blocks.

[0024] The above-mentioned fixing member is formed to extend across the cell stack included in the cell stack assembly and can support the upper part of the cell stack.

[0025] The above-mentioned pack case includes a lower plate that supports the lower part of the cell stack assembly to be arranged, and side walls formed along the edge of the lower plate so as to wrap the side surface of the cell stack assembly. The inner surface of the side wall includes a seating portion protruding in the direction of the cell stack assembly. The support block of the cell stack assembly includes a protruding portion protruding in at least one direction of the front surface and the rear surface of the cell stack assembly. The cell stack assembly can be arranged in the pack case such that the protruding portion seats on the seating portion of the side wall.

[0026] The above-mentioned seating portion includes a seating groove at the upper part, and the protruding portion includes a protruding hole formed to penetrate through the upper and lower parts. The cell stack assembly can be screw-coupled to the side wall by bolts inserted into the protruding hole and the seating groove.

Advantages of the Invention

[0027] According to the present invention, the energy density of the battery pack can be increased by improving the space utilization rate inside the battery pack.

Brief Description of the Drawings

[0028] [Figure 1] It shows a conventional cell stack assembly. [Figure 2] It is an exploded perspective view of the cell stack assembly of the present invention. [Figure 3] It is a perspective view of the cell stack assembly of the present invention. [Figure 4] It is a perspective view of the cover and the cell stack assembly of the present invention. [Figure 5] It is a perspective view of the cell stack assembly of the present invention with the cover coupled. [Figure 6] It is a cross-sectional view of the cell stack assembly of FIG. 5 above. [Figure 7] This is a perspective view of the battery pack of the present invention. [Figure 8] This is a perspective view of a pair of cell stack assemblies of the present invention arranged adjacent to each other. [Figure 9] This is a rear perspective view of the pack case of the present invention. [Figure 10] This is a modified example of the support block of the present invention. [Figure 11] The above Figure 10 shows a portion of the cell stack assembly and pack case to which the support blocks are applied. [Figure 12] This is a plan view of the battery pack, including the cell stack assembly to which the support block shown in Figure 11(a) above is applied, and the pack case in which the cell stack assembly is arranged. [Figure 13] This shows the fixing member and cell stack assembly included in the battery pack of the present invention according to the first embodiment. [Figure 14] This is a perspective view of a pair of cell stack assemblies to which the fixing members shown in Figure 13 above are applied. [Figure 15] The above Figure 13 shows a plan view of a battery pack including a cell stack assembly to which the fixing member is applied, and a pack case in which the cell stack assembly is arranged. [Figure 16] This shows the fixing member and cell stack assembly included in the battery pack of the present invention according to the second embodiment. [Figure 17] This shows the fixing member and cell stack assembly included in the battery pack of the present invention according to the third embodiment. [Modes for carrying out the invention]

[0029] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. Before that, however, terms and words used herein and in the claims should not be interpreted to be limited to their ordinary or dictionary meanings, but rather to be interpreted as meanings and concepts consistent with the technical idea of ​​the present invention, based on the principle that an inventor may suitably define the concepts of terms in order to best describe his own invention.

[0030] Therefore, the embodiments described herein and the configurations illustrated in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the present invention. It should be understood that there are various equivalents and modifications that can substitute for them at the time of filing.

[0031] Furthermore, in describing the present invention, if it is determined that a specific description of a related known configuration or function may obscure the gist of the invention, such detailed description will be omitted.

[0032] Since embodiments of the present invention are provided to more fully explain the invention to an ordinary person of the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for the sake of clarity. Accordingly, the sizes and proportions of each component do not fully reflect their actual sizes and proportions.

[0033] The present invention relates to a cell stack assembly and a battery pack including the cell stack assembly. The cell stack assembly of the present invention will be described below with reference to Figures 2 to 6, and the battery pack of the present invention will be described with reference to Figures 7 to 17.

[0034] <Cell stack assembly 100> Figure 2 is an exploded perspective view of the cell stack assembly 100 of the present invention, and Figure 3 is a perspective view of the cell stack assembly 100 of the present invention.

[0035] According to Figures 2 and 3 above, the cell stack assembly 100 of the present invention includes a cell stack 110, a busbar frame 120, an end plate 130, and a support block 140.

[0036] The cell stack 110 includes a plurality of stacked battery cells 111. Each battery cell 111 includes an electrode assembly inside, a pair of electrode leads electrically connected to the electrode assembly, and a battery case enclosing the electrode assembly so that the electrode leads are led outwards. In this case, the electrode leads may be led out on both sides of the battery case.

[0037] The busbar frame 120 includes a busbar 121 (not shown) which is electrically connected to the battery cell 111.

[0038] The busbar frame 120 is tightly coupled to the cell stack 110 at the front and rear of the cell stack 110 so that the electrode leads of each battery cell 111 included in the cell stack 110 are connected to the busbar 121.

[0039] The end plate 130 is coupled to the busbar frame 120 so as to cover the busbar 121 and electrode leads, etc., from external impacts.

[0040] Furthermore, the end plate 130 securely fastens each battery cell 111 included in the cell stack 110.

[0041] The support block 140 is attached to both sides of the end plate 130, as shown in Figure 3, so as to cover 150 one side of the battery cell 111 located at the outermost edge of the cell stack 110.

[0042] The support block 140 described above may be made of the same material as the partitions conventionally installed to partition the inside of the battery pack 1000 and separate each battery module, and preferably includes flame-retardant and heat-resistant material.

[0043] The support block 140 may be screw-connected to the end plate 130, or it may be joined to the end plate 130 by methods such as adhesive and heat fusion.

[0044] The support block 140, while coupled with the end plate 130, is in close contact with the battery cell 111 located on the outermost edge of the cell stack 110, thereby protecting the cell stack 110.

[0045] The support block 140 described above is characterized by including fastening grooves 141 at the top and bottom into which bolts B can be inserted, as shown in Figure 2.

[0046] Multiple fastening grooves 141 are formed along the longitudinal direction of the support block 140 at predetermined intervals.

[0047] It is preferable that the fastening grooves 141 formed in each of the above-mentioned support blocks 140 are formed at positions facing each other with respect to the cell stack 110.

[0048] The fastening groove 141 includes an upper fastening groove 141a formed on the upper part of the support block 140, and a lower fastening groove 141b formed on the lower part of the support block 140.

[0049] The upper fastening groove 141a and the lower fastening groove 141b, which are formed on the upper and lower parts of the support block 140, may be separated from each other, or they may be connected to each other by penetrating the support block 140 in the thickness direction.

[0050] Figure 4 shows the cell stack assembly 100 of the present invention and a cover 150 that can be connected to the cell stack assembly 100.

[0051] As shown in Figure 4 above, the cell stack assembly 100 of the present invention further includes a cover 150 which is coupled to the support block 140 to cover at least one of the open upper and lower parts of the cell stack 110.

[0052] The cover 150 includes through holes in the area where it is joined in contact with the support block 140, corresponding to the fastening grooves 141 of the support block 140 to which it is joined. That is, the cover 150 includes through holes on both side edges through which bolts B pass.

[0053] The cover 150 includes an upper cover 151 that connects to the support block 140 at the top of the cell stack assembly 100, and a lower cover 152 that connects to the support block 140 at the bottom of the cell stack assembly 100.

[0054] Figure 5 is a perspective view of the cell stack assembly 100, in which the upper cover 151 and lower cover 152 and the support block 140 are connected.

[0055] As shown in Figure 5 above, the upper cover 151 is connected to the upper surface of the support block 140, and the lower cover 152 is connected to the lower surface of the support block 140.

[0056] The upper cover 151 and the lower cover 152 can be screw-connected to the support block 140 by bolts B inserted into through holes and fastening grooves 141 formed on the upper and lower parts of the support block 140, respectively.

[0057] The cover 150 may be used temporarily to protect the cell stack 110 which is exposed to the outside in the cell stack assembly 100, and may be separated from the cell stack assembly 100 at any time as needed.

[0058] Figure 6 shows a cross-section of the cell stack assembly 100 shown in Figure 5.

[0059] As shown in Figure 6, the lower cover 152 is connected to the support block 140 at the bottom of the cell stack 110, and can support the lower part of the cell stack 110 so that it does not sag downwards. The cell stack 110 can also be sealed and protected from the outside by the support block 140 that encloses both sides, the end plates 130 that enclose the front and rear surfaces, and the cover 150 that covers the top and bottom.

[0060] <Battery Pack 1000> The battery pack 1000 of the present invention includes a cell stack assembly 100 of the present invention and a pack case 200 in which the cell stack assembly 100 is arranged. The battery pack 1000 of the present invention may further include a cover 150 (not shown) for the pack case 200, which is coupled to the pack case 200 so as to cover the top of the cell stack assembly 100 at the top of the pack case 200.

[0061] Figure 7 shows the battery pack 1000 of the present invention, in which multiple cell stack assemblies 100 are arranged inside the pack case 200.

[0062] Specifically, the pack case 200 includes a bottom plate 210 that supports the lower part of the cell stack assembly 100 in which it is placed, and a side wall 220 formed along the edge of the bottom plate 210 so as to wrap around the side of the cell stack assembly 100.

[0063] The cell stack assembly 100 is placed inside the pack case 200 such that at least one of the support blocks 140 on one side is in contact with one side of the support block 140 of an adjacent cell stack assembly 100.

[0064] The pack case 200 may include a central partition wall 230 that crosses its center, and the cell stack assembly 100 may be arranged symmetrically around the central partition wall 230, as shown in Figure 7.

[0065] Figure 8 shows a perspective view and a partial cross-sectional view of a pair of cell stack assemblies 100 arranged adjacent to each other inside a pack case 200.

[0066] As shown in Figure 8 above, it is preferable that fastening grooves 141 are formed at corresponding positions in the support blocks 140 of adjacent and different cell stack assemblies 100. That is, the fastening grooves 141 included in the different support blocks 140 are formed at the same position along the longitudinal direction of the support block 140.

[0067] It is preferable that the cell stack assembly 100 placed in the pack case 200 is connected to and fixed to the pack case 200.

[0068] Figure 9 is a rear perspective view of the battery pack 1000 of the present invention.

[0069] The pack case 200 of the present invention may include a bottom hole 211 formed through the bottom corresponding to the position of a fastening groove 141 formed at the lower part of the cell stack assembly 100. Specifically, the bottom hole 211 is formed through the bottom plate 210 of the pack case 200 at a position corresponding to the lower fastening groove 141b formed at the lower part of the support block 140 included in the cell stack assembly 100 placed in the pack case 200.

[0070] Each cell stack assembly 100 placed in the pack case 200 can be fixed to the pack case 200 by screw fastening bolts B that are inserted through the bottom hole 211 of the pack case 200 and into fastening grooves 141 formed in the support block 140, as shown in Figure 9.

[0071] Although not shown in the diagram, for convenience, the bolt B can also be inserted through the upper fastening groove 141a and lower fastening groove 141b of the support block 140 and into the bottom hole 211 of the lower plate 210 to fix the cell stack assembly 100 and the pack case 200.

[0072] According to a modified version of the support block 140 of the present invention, the support block 140 may include a protruding portion 142 that protrudes in at least one direction from either the front or rear surface of the cell stack assembly 100. Furthermore, the inner surface of the side wall 220 included in the pack case 200 may include a fixing portion 221 that is formed to protrude in the direction of the cell stack assembly 100.

[0073] Figure 10 shows a modified example of the support block 140, and more specifically, a partial cross-sectional view of a pack case 200 including the anchoring portion 221 and a cell stack assembly 100 arranged in the pack case 200.

[0074] According to Figure 10 above, the cell stack assembly 100 is positioned in the pack case 200 such that the protruding portion 142 is securely attached to the attachment portion 221 of the side wall 220.

[0075] Figure 11 shows a cell stack assembly 100 and a part of the pack case 200, with protrusions 142 formed on one or both sides of the support block 140, and Figure 12 is a plan view of the battery pack 1000 in which the cell stack assembly 100 of Figure 11(a) is arranged inside the pack case 200.

[0076] As shown in Figure 11 above, the cell stack assembly 100 is formed so that the protruding portion 142 faces toward the side wall 220 of the pack case 200, protruding from one side of the support block 140 (Figure 11(a)), or the protruding portion 142 is formed so that it protrudes from both sides of the support block 140 (Figure 11(b)).

[0077] Referring to Figure 12 above, each cell stack assembly 100 is placed inside the pack case 200 such that the protruding portion 142 faces the side wall 220.

[0078] The cell stack assembly 100 can be fixed to the pack case 200 by screw-connecting the protruding portion 142 of the support block 140 to the anchoring portion 221 of the side wall 220. Specifically, as shown in the figure, the anchoring portion 221 includes an anchoring groove 221a at the top into which a bolt B can be inserted, and the protruding portion 142 includes a protruding hole 142a through which the bolt B can pass and be connected.

[0079] The cell stack assembly 100 can be fixed to the side wall 220 by screw coupling with bolts B inserted into the protruding holes 142a and the fastening grooves 221a.

[0080] The battery pack 1000 further includes a fixing member 300 that is coupled to the support block 140 of the cell stack assemblies 100 so as to secure the at least two cell stack assemblies 100 arranged in the pack case 200. More specifically, the fixing member 300 includes a fixing hole 300a formed through each of the support blocks 140 at a position corresponding to a fastening groove 141. The fixing member 300 is also screw-coupled to the support blocks 140 by bolts B inserted into the fixing holes 300a and the fastening grooves 141 corresponding to the fixing holes 300a.

[0081] Through the above connection, each cell stack assembly 100 is fixed and connected to one another.

[0082] The battery pack 1000 of the present invention can be divided into several embodiments depending on the form of the fixing member 300.

[0083] The battery pack 1000 of the present invention will be described below with reference to Figures 13 to 17 for each embodiment.

[0084] (First Embodiment) The fixing member 300 included in the battery pack 1000 of the present invention according to the first embodiment is characterized in that both ends are connected to two adjacent support blocks 140.

[0085] Figure 13 shows the configuration of a pair of adjacent cell stack assemblies 100 and a fixing member 300 of the battery pack 1000 according to the first embodiment. Figure 14 is a perspective view showing the pair of cell stack assemblies 100 joined by the fixing member 300 in Figure 13. Figure 15 is a plan view of the battery pack 1000, which is arranged inside the pack case 200 with each cell stack assembly 100 connected by the fixing member 300 in Figure 13.

[0086] The fixing member 300 included in the battery pack 1000 of the present invention according to the first embodiment described above includes a pair of fixing holes 300a through which a bolt B is drilled.

[0087] As shown in Figure 14, the fixing member 300 is positioned on the support block 140 such that each fixing hole 300a corresponds to each fastening groove 141 formed in the two adjacent support blocks 140, and is fixed to each support block 140 by bolts B inserted into the fixing holes 300a and fastening grooves 141.

[0088] A pair of adjacent cell stack assemblies 100 are connected to each other by screwing the fixing member 300 to each support block 140.

[0089] (Second Embodiment) The fixing member 300 included in the battery pack 1000 of the present invention according to the second embodiment is characterized in that it is formed to extend along the longitudinal direction of the support block 140 and both ends are connected to two adjacent support blocks 140.

[0090] Figure 16 shows the configuration of a pair of adjacent cell stack assemblies 100 and a fixing member 300 of a battery pack 1000 according to the second embodiment.

[0091] The fixing member 300 included in the battery pack 1000 of the present invention according to the second embodiment described above includes a plurality of fixing holes 300a through which a bolt B passes.

[0092] As shown in Figure 16, the fixing member 300 extends along the longitudinal direction of the support block 140 and includes a plurality of fixing holes 300a formed along the extended direction to correspond to the fastening grooves 141 of each support block 140. That is, the fixing holes 300a are formed at predetermined intervals along the longitudinal direction of the fixing member 300 to correspond to the fastening grooves 141 of each support block 140.

[0093] The fixing member 300 securely fastens the pair of cell stack assemblies 100 by a plurality of bolts B inserted into fixing holes 300a formed to correspond to the fastening grooves 141.

[0094] (Third embodiment) The fixing member 300 included in the battery pack 1000 of the present invention according to the third embodiment is characterized in that it is formed to extend in a direction that crosses the cell stack 110 included in the cell stack assembly 100 and is connected to a plurality of support blocks 140. More specifically, the extended fixing member 300 can be connected to at least four support blocks 140.

[0095] Figure 17 shows the configuration of a pair of adjacent cell stack assemblies 100 and a fixing member 300 of the battery pack 1000 according to the third embodiment.

[0096] The fixing member 300 included in the battery pack 1000 of the present invention according to the third embodiment described above includes a plurality of fixing holes 300a through which a bolt B passes.

[0097] As shown in Figure 17, the fixing member 300 extends in a direction that spans the cell stack 110 and the support block 140, and includes a plurality of fixing holes 300a formed along the extended direction to correspond to the fastening grooves 141 of each support block 140. That is, the fixing holes 300a are formed at predetermined intervals along the longitudinal direction of the fixing member 300 to correspond to the fastening grooves 141 of each support block 140.

[0098] The fixing member 300 can fix multiple cell stack assemblies 100 by a plurality of bolts B inserted into fixing holes 300a formed to correspond to the fastening grooves 141, and can also support the upper part of the cell stacks 110 housed in the fixed cell stack assemblies 100.

[0099] The fixing members 300 included in the battery pack 1000 according to the three embodiments described above can be mixed and used within a single battery pack 1000 as needed.

[0100] The present invention has been described in more detail above with reference to the drawings and embodiments. However, the configurations described in the drawings or embodiments described herein are merely one embodiment of the present invention and do not represent the entire technical concept of the present invention. It should be understood that there are various equivalents and modifications that can substitute for them at the time of filing this application. [Explanation of symbols]

[0101] 100-cell stack assembly 110 cell stack 111 battery cells 120 Busbar Frame 121 Bus Bar 130 End Plate 140 Support Blocks 141 Fastening groove 141a Upper fastening groove 141b Lower fastening groove 142 Protrusion 142a Protruding Hole 150 Cover 151 Top cover 152 Lower cover 200 pack case 210 Lower plate 211 Bottom Hole 220 Side wall 221 Safeguards 221a Seat groove 230 Center bulkhead 300 Fixing member 300a Fixed Hole 1000 Battery Pack B bolt

Claims

1. A cell stack in which multiple battery cells are stacked, The busbar frame includes a busbar electrically connected to the battery cell, and the busbar frames are tightly coupled to the front and rear of the cell stack, respectively. An end plate that is connected to the busbar frame so as to cover the busbar, Support blocks are coupled to both sides of the end plate so as to cover one side of the battery cell located at the outermost edge of the cell stack, A cover coupled to the support block so as to cover at least one of the open upper and lower parts of the cell stack, The support block includes fastening grooves at the top and bottom, The cover is a cell stack assembly having through holes corresponding to fastening grooves of the support block in an area that is in contact with and coupled to the support block.

2. The cell stack assembly according to claim 1, wherein the fastening grooves are formed in a plurality at predetermined intervals along the longitudinal direction of the support block.

3. The cell stack assembly according to claim 1, wherein the support blocks located on both sides of the cell stack each include fastening grooves at positions facing each other.

4. The cell stack assembly according to claim 1, wherein the support block and cover are screw-connected by bolts inserted through the through-holes into the fastening grooves.

5. A cell stack assembly, A battery pack comprising a pack case in which multiple cell stack assemblies are arranged, The cell stack assembly is A cell stack in which multiple battery cells are stacked, The busbar frame includes a busbar electrically connected to the battery cell, and the busbar frames are tightly coupled to the front and rear of the cell stack, An end plate that is connected to the busbar frame so as to cover the busbar, The cell stack includes support blocks that are coupled to both sides of the end plate so as to cover one side of the battery cell located at the outermost edge of the cell stack, The support block includes fastening grooves at the top and bottom, The aforementioned cell stack assembly is a battery pack in which at least one support block is arranged to be in contact with one surface of a support block of an adjacent cell stack assembly.

6. The pack case includes a bottom hole formed through the bottom corresponding to the position of the fastening groove formed at the bottom of the cell stack assembly, The battery pack according to claim 5, wherein the cell stack assembly is coupled to the pack case by bolts inserted into the fastening grooves and bottom holes.

7. The pack case further includes fixing members that are coupled to the support blocks of each cell stack assembly in order to secure at least two cell stack assemblies arranged in the pack case, The fixing member includes a fixing hole formed through to a position corresponding to the fastening groove of each support block, The battery pack according to claim 5, wherein the fixing member is screw-coupled to the support block by bolts inserted into the fixing holes and fastening grooves corresponding to the fixing holes.

8. The battery pack according to claim 7, wherein the fixing member is connected at both ends to two adjacent support blocks to fix a pair of cell stack assemblies.

9. The fixing member is formed to extend along the longitudinal direction of two adjacent support blocks, The battery pack according to claim 7, wherein the fixing holes are formed spaced apart along the longitudinal direction of the fixing member so as to correspond to the fastening grooves of each support block.

10. The battery pack according to claim 7, wherein the fixing member is formed to extend in the width direction of the support block to fix a plurality of cell stack assemblies and is coupled with at least four support blocks.

11. The battery pack according to claim 10, wherein the fixing member is formed to extend across the cell stack included in the cell stack assembly and supports the upper part of the cell stack.

12. The pack case includes a lower plate that supports the lower part of the cell stack assembly being placed, The cell stack assembly includes a side wall formed along the edge of the lower plate so as to enclose the side surface of the cell stack assembly, The inner surface of the side wall includes an attachment portion that protrudes in the direction of the cell stack assembly. The support block of the cell stack assembly includes a projection that protrudes in at least one direction from either the front or rear surface of the cell stack assembly. The battery pack according to claim 5, wherein the cell stack assembly is arranged in the pack case such that the protruding portion is secured on the securing portion of the side wall.

13. The aforementioned attachment portion includes an attachment groove at its upper part. The aforementioned protrusion includes a protruding hole formed through the upper and lower parts, The battery pack according to claim 12, wherein the cell stack assembly is screw-coupled to the side wall by bolts inserted into the protruding holes and fastening grooves.

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