Battery packs and automobiles including them

Abstract

A battery pack and an automobile including the same are disclosed. A battery pack according to one embodiment of the present invention includes a plurality of battery cells, a pack case housing the plurality of battery cells and having at least a portion separated, a reinforcing member inserted into the separated portion of the pack case, and a connecting member connecting the pack case and the reinforcing member.

Description

Technical Field

[0001] This application claims priority based on Korean Patent Application No. 10-2024-0069383 filed on May 28, 2024, and all contents disclosed in the specification and drawings of that application are incorporated into this application by reference.

[0002] The present invention relates to a battery pack and a vehicle including the same, and more particularly, to a battery pack capable of improving space utilization of the battery pack and increasing battery capacity, and a vehicle including the same. Background Art

[0003] In general, a secondary battery refers to a battery that can be repeatedly charged and discharged, such as lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. A battery cell, which is the most basic secondary battery, can provide an output voltage of approximately 2.5 V to 4.2 V.

[0004] Recently, such battery cells have been applied to devices requiring high output voltage and large charging capacity, such as electric vehicles (EVs) and ESS (Energy Storage System). Accordingly, battery modules configured by connecting a plurality of battery cells in series, parallel, or a combination of series and parallel, and battery packs configured by connecting such battery modules again in series, parallel, or a combination of series and parallel are widely used.

[0005] Lithium secondary batteries are currently attracting attention due to their advantages of high operating voltage and very high energy density. However, since they use organic electrolytes, they cause overcurrent and overheating during overcharging of the lithium secondary battery, and in severe cases, there is a problem that they cause fire due to explosion or ignition.

[0006] Various types of rechargeable batteries include battery modules, which have a module case that can protect the battery cells and in which multiple battery cells are stacked and housed in the module case, and battery packs, which contain multiple battery modules.

[0007] In recent years, for medium- and large-sized battery packs used in electric vehicles and other applications, it has become important to include a large number of battery cells in order to increase battery capacity. However, with conventional technology, the utilization rate of the limited space inside the pack case is low, which makes it difficult to increase battery capacity. [Overview of the project] [Problems that the invention aims to solve]

[0008] Therefore, the technical problem that the present invention aims to solve is to provide a battery pack that can improve the space utilization rate of the battery pack and thereby increase the battery capacity, and an automobile including the same.

[0009] Furthermore, the objective is to provide a battery pack that can maintain rigidity even when the pack case is separated in order to improve the space utilization rate of the battery pack, and an automobile including the same.

[0010] Furthermore, the objective is to provide a battery pack that can be easily joined by bolts, even when welding is difficult, and an automobile including the same.

[0011] However, the technical problems that this invention aims to solve are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention below. [Means for solving the problem]

[0012] According to one aspect of the present invention, a battery pack may be provided that includes a plurality of battery cells, a pack case housing the plurality of battery cells and having at least a portion separated, a reinforcing member inserted into the separated portion of the pack case, and a connecting member connecting the pack case and the reinforcing member.

[0013] In one embodiment, the pack case includes a side frame, the side frame includes a first side frame and a second side frame separated from the first side frame, and the reinforcing member may be positioned between the first side frame and the second side frame.

[0014] In one embodiment, the connecting member may include a connecting portion that is coupled to the first side frame, the reinforcing member, and the second side frame, and a fastening portion that fastens the connecting portion.

[0015] In one embodiment, a fastening groove is formed in the connecting portion, and the fastening portion is a bolt fastened to the fastening groove, and the bolt may include a first bolt fastening the side first frame to the connecting portion, a second bolt fastening the reinforcing member to the connecting portion, and a third bolt fastening the side second frame to the connecting portion.

[0016] In one embodiment, the pack case includes a partition frame, the partition frame includes a first partition frame and a second partition frame separated from the first partition frame, and the reinforcing member may be placed between the first partition frame and the second partition frame.

[0017] In one embodiment, the connecting member may include a connecting portion that is coupled to the first partition frame, the reinforcing member, and the second partition frame, and a fastening portion that fastens the connecting portion.

[0018] In one embodiment, a fastening groove is formed in the connecting portion, and the fastening portion is a bolt fastened to the fastening groove, and the bolt may include a first bolt fastening the first partition frame to the connecting portion, a second bolt fastening the reinforcing member to the connecting portion, and a third bolt fastening the second partition frame to the connecting portion.

[0019] In one embodiment, the pack case may include a plurality of partition frames, and a plurality of the battery cells may be arranged between the plurality of partition frames.

[0020] In one embodiment, the multiple partition frames may be arranged in either the lateral or vertical direction only.

[0021] In one embodiment, the pack case includes a plurality of side frames, the plurality of side frames including long side frames and short side frames, and the partition frame may be arranged only in a direction parallel to the short side frames.

[0022] In one embodiment, the pack case includes a lower frame and a support member coupled to the lower frame, and the partition frame can be coupled to the support member.

[0023] In one embodiment, one of the plurality of partition frames may include a first partition member located on one side and a second partition member coupled to the first partition member.

[0024] In one embodiment, the first partition member may include a first plate arranged in the vertical direction and a first support base coupled to the upper side of the first plate.

[0025] In one embodiment, the second partition member may include a second plate arranged in the vertical direction and a second support base coupled to an intermediate portion of the second plate.

[0026] In one embodiment, the first plate and the second plate are arranged to face each other, and the first support base can contact the second support base on an upper side of the second support base.

[0027] In one embodiment, the support member is arranged between the first plate and the second plate, and can contact the second support base.

[0028] On the other hand, according to another aspect of the present invention, there can be provided an automobile including at least one of the aforementioned battery packs.

Effects of the Invention

[0029] Embodiments of the present invention have the effect of improving the space utilization of a battery pack, thereby increasing the battery capacity.

[0030] Additionally, even if the pack case is divided to improve the space utilization of the battery pack, the present invention has the effect of maintaining rigidity.

[0031] Additionally, even when welding is difficult, the present invention has the effect of enabling easy connection by bolts.

[0032] However, the effects obtained by the present invention are not limited to the above-mentioned effects, and other technical effects not mentioned herein will be clearly understood by those skilled in the art from the following description of the invention.

[0033] The following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further the understanding of the technical idea of the present invention together with the detailed description of the invention. Therefore, the present invention should not be construed as being limited only to the matters described in the drawings.

Brief Description of the Drawings

[0034] [Figure 1] It is an overall perspective view of the battery pack according to one embodiment of the present invention.

[0035] [Figure 2] This is a plan view of a battery pack according to one embodiment of the present invention, showing only a portion of it.

[0036] [Figure 3] This is an enlarged view of section A in Figure 1, where the bolt is separated from the fastening groove of the connection.

[0037] [Figure 4] Figure 1 shows the battery after some of the battery cells and bulkhead frame have been removed.

[0038] [Figure 5] Figure 1 shows the battery cells removed, with the bulkhead frame visible.

[0039] [Figure 6] Figure 1 shows a portion of the partition frame separated.

[0040] [Figure 7] This is a perspective view of a partition frame provided in a battery pack according to one embodiment of the present invention.

[0041] [Figure 8] This is a view along the direction of arrow B in Figure 7.

[0042] [Figure 9] This is a perspective view of the partition frame provided in a battery pack according to one embodiment of the present invention.

[0043] [Figure 10] This is a diagram illustrating an automobile including a battery pack according to each embodiment of the present invention. [Modes for carrying out the invention]

[0044] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and in the claims are not to be interpreted in their ordinary and dictionary sense, but rather in a sense and concept appropriate to the technical idea of ​​the present invention, in accordance with the principle that the inventor may appropriately define the concept of a term in order to best describe the invention. Therefore, it should be understood that the configurations shown in the embodiments described herein represent only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and that there may be a variety of equivalents and modifications that can be substituted therein at the time of this application.

[0045] In the drawings, the size of each component or specific part of that component is exaggerated, omitted, or schematic for the sake of clarity and ease of explanation. Therefore, the size of each component does not fully reflect its actual size. Where a specific description of a relevant known function or configuration is deemed to unnecessarily obscure the gist of the invention, such description is omitted.

[0046] As used herein, the terms “joining” or “connecting” include not only cases where one member is directly joined or directly connected to another member, but also cases where one member is indirectly joined or indirectly connected to another member via a connecting member.

[0047] Figure 1 is an overall perspective view of a battery pack according to one embodiment of the present invention; Figure 2 is a plan view of a battery pack according to one embodiment of the present invention, showing only a portion of it; Figure 3 is an enlarged view of portion A in Figure 1, where the bolts are separated from the fastening grooves of the connection part; Figure 4 shows the state after some battery cells and the bulkhead frame have been removed from Figure 1; and Figure 5 shows the state after the battery cells have been removed from Figure 1, with the bulkhead frame still visible.

[0048] Referring to the drawings, a battery pack 10 according to one embodiment of the present invention may be composed of a plurality of battery cells 100, a pack case 200, a reinforcing member 300, and a connecting member 400.

[0049] The battery cell 100 can be of various types. For example, the battery cell 100 may include at least one of a pouch-type battery cell, a cylindrical battery cell, and a prismatic battery cell. However, for the sake of explanation, the following description will focus on the case where the battery cell 100 is a pouch-type battery cell.

[0050] Multiple battery cells 100 can be stacked on top of each other. The battery cells 100 can have various structures, and multiple battery cells 100 can be stacked in various ways.

[0051] The battery cell 100 may have a structure in which multiple unit cells arranged in the order of positive electrode plate - separator - negative electrode plate, or bi-cells arranged in the order of positive electrode plate - separator - negative electrode plate - separator - positive electrode plate - separator - negative electrode plate are stacked according to the battery capacity.

[0052] The battery cell 100 may be provided with electrode leads. Electrode leads are a type of terminal that is exposed to the outside and connected to external devices, and can be made of a conductive material. Electrode leads may include positive and negative leads.

[0053] The positive and negative leads may be positioned in opposite directions relative to the longitudinal direction of the battery cell 100, or they may be positioned in the same direction relative to the longitudinal direction of the battery cell 100.

[0054] For example, the battery cell 100 can be housed in a module case (not shown), and the module case containing the battery cell 100 can be housed in a pack case 200 to constitute the battery pack 10. However, it is not limited to this, and the module case can be removed to reduce its weight and volume, in which case the battery cell 100 can be directly housed in the pack case 200 of the battery pack 10.

[0055] This method allows additional battery cells 100 to be housed in the space previously occupied by the battery module's module case within the battery pack 10, resulting in improved space efficiency and increased battery capacity.

[0056] For the sake of explanation, the following description will focus on the case where the battery cell 100 is directly housed in the pack case 200 without a module case. However, rather than completely excluding embodiments that use a module case, the pouch-type battery cell 100 of each embodiment of the present invention can be configured to be housed in a module case provided in the battery module, as needed.

[0057] Here, a cell cover (not shown) supporting the battery cell 100 can be provided so that the battery cell 100 can be directly housed in the pack case 200. The cell cover can have various shapes, for example, it can be configured in an "n", "u", or "ko" shape that surrounds three sides of at least one battery cell 100. However, it is not limited to these.

[0058] Furthermore, the battery pack 10 according to this embodiment may include, for example, a control module configured to control the charging and discharging of the pouch-type battery cells 100. Such a control module may include, for example, a Battery Management System (BMS) and a battery shut-off unit, and may be housed inside the pack case 200 together with the battery cells 100 and cell covers.

[0059] Referring to Figure 1, the pack case 200 contains multiple battery cells 100, and at least a portion of the pack case 200 is separated.

[0060] The pack case 200 can be configured, for example, to include a lower frame 210, side frames 220, and partition frames 230. Here, the pack case 200 may include multiple side frames 220. Also, the pack case 200 may include multiple partition frames 230.

[0061] The lower frame 210 is configured to accommodate multiple battery modules. The lower frame 210 may, but is not limited to, be formed in the shape of a rectangular plate. The lower frame 210 forms the bottom of the pack case 200.

[0062] The side frame 220 may be configured to extend upward from the edge of the lower frame 210. The side frame 220 defines the height of the pack case 200 and forms a predetermined space between it and the lower frame 210.

[0063] Furthermore, multiple battery cells 100 are secured in the space between the side frame 220 and the lower frame 210. Multiple side frames 220 are provided, and referring to Figures 1 and 2, the multiple side frames 220 may include long-side side frames 221 with relatively longer lengths and short-side side frames 222 with relatively shorter lengths. Alternatively, the lengths of all side frames 220 may be the same.

[0064] If there are multiple side frames 220, one of the side frames 220 may include a first side frame 225 and a second side frame 226. Referring to Figure 2, the short-side frame 222 is configured to include the first side frame 225 and the second side frame 226, but is not limited to this; the long-side frame 221 may also be configured to include the first side frame 225 and the second side frame 226. In this case, the shape and arrangement of the partition frame 230 may change. However, for the sake of explanation, the case in which the short-side frame 222 includes the first side frame 225 and the second side frame 226 will be described below.

[0065] The first side frame 225 and the second side frame 226 are separated from each other. Here, the first side frame 225 and the second side frame 226 may, but are not necessarily limited to, be formed symmetrically with respect to each other.

[0066] Furthermore, a reinforcing member 300 may be placed between the first side frame 225 and the second side frame 226. Here, the connecting member 400 can connect the first side frame 225, the reinforcing member 300, and the second side frame 226. A detailed explanation of the connecting member 400 will be given later.

[0067] Referring to Figures 1 and 3, the partition frame 230 is connected to the side frame 220 and the lower frame 210. Multiple partition frames 230 may be provided, and multiple battery cells 100 can be arranged between the multiple partition frames 230. In other words, the partition frame 230 is interposed between the multiple battery cells 100.

[0068] Referring to Figure 2, if there are multiple partition frames 230, one of the multiple partition frames 230 can include a first partition frame 231 and a second partition frame 232.

[0069] Furthermore, the first partition frame 231 and the second partition frame 232 are separated from each other. Adjacent battery cells 100 are spaced apart to prevent short circuits caused by various terminals, and the first partition frame 231 and the second partition frame 232 may also be separated accordingly. Here, the first partition frame 231 and the second partition frame 232 may be formed symmetrically with respect to each other, but are not necessarily limited to this.

[0070] Furthermore, a reinforcing member 300 may be placed between the first bulkhead frame 231 and the second bulkhead frame 232. Here, the connecting member 400 can connect the first bulkhead frame 231, the reinforcing member 300, and the second bulkhead frame 232. A detailed explanation of the connecting member 400 will be given later.

[0071] The partition frame 230 can be arranged in only one direction. For example, if the side frame 220 includes a long side frame 221 and a short side frame 222, the multiple partition frames 230 can be arranged in only one of the two directions: the lateral direction or the vertical direction.

[0072] Of course, even if all side frames 220 are the same length, multiple partition frames 230 can be arranged in only one direction, either lateral or longitudinal. However, for the sake of explanation, the case in the following description will be described as one in which the side frames 220 include long side frames 221 and short side frames 222.

[0073] For example, referring to Figures 1 and 5 together, the partition wall frame 230 is positioned only in a direction parallel to the X direction with respect to Figure 5, and not in a direction parallel to the Y direction. That is, the partition wall frame 230 is positioned only in a direction parallel to the short side frame 222, and not in a direction parallel to the long side frame 221.

[0074] Referring to Figure 2, this arrangement allows battery cells 100 to be placed in the space S where partition frames 230 can be arranged in a direction parallel to the long side frame 221 (for example, the space between adjacent partition frames 230 arranged opposite each other along a direction parallel to the short side frame 222, and the space formed in the center parallel to the long side frame 221). As a result, more battery cells 100 can be placed compared to a conventional battery pack 10, which improves the space utilization rate of the battery pack 10 and thereby increases the battery capacity.

[0075] However, in order to prevent short circuits between the various terminals connected to the battery cells 100, a certain amount of space is required between the battery cells 100. This space can be much narrower than the space occupied by the partition frame 230 which is conventionally arranged parallel to the long side frame 221, thus improving the aforementioned space utilization rate.

[0076] Figure 6 shows a portion of the partition frame separated from Figure 1, Figure 7 is a perspective view of the partition frame provided in a battery pack according to one embodiment of the present invention, Figure 8 is a view along the direction of arrow B in Figure 7, and Figure 9 is a separated perspective view of the partition frame provided in a battery pack according to one embodiment of the present invention.

[0077] Referring to Figures 6 to 9, the partition frame 230 may be configured to include a first partition member 233 and a second partition member 236.

[0078] The first partition member 233 is located on one side. In Figure 8, the first partition member 233 is located on the left side with respect to Figure 8 (left side with respect to the Y direction in Figure 8), but the first partition member 233 can also be located on the right side with respect to Figure 8. In other words, the side on which the first partition member 233 is located can be either the left or the right side.

[0079] The first partition member 233 may include a first plate 234 and a first support base 235. The first plate 234 may be positioned vertically (Z-direction in Figure 8) with reference to Figure 8. The first support base 235 may be coupled to the upper side of the first plate 234 (see Figure 9).

[0080] The second partition member 236 is connected to the first partition member 233. The second partition member 236 is located on the other side of the first partition member 233. In Figure 8, the second partition member 236 is located on the right side with respect to Figure 8 (the right side with respect to the Y direction in Figure 8), but the second partition member 236 can also be located on the left side with respect to Figure 8. In other words, the other side on which the second partition member 236 is located can be either the right or the left side.

[0081] The second partition member 236 may include a second plate 237 and a second support base 238. The second plate 237 may be positioned vertically (Z-direction in Figure 8) with reference to Figure 8. The second support base 238 may be coupled to the middle portion of the second plate 237 (see Figure 9).

[0082] Referring to Figures 7 and 8, the first plate 234 and the second plate 237 may be arranged to face each other. Also, when the first plate 234 and the second plate 237 are arranged to face each other, the first support base 235 may be configured to contact the second support base 238 above the second support base 238.

[0083] Here, the first partition member 233 and the second partition member 236 can be joined together by bolts (not shown).

[0084] Referring also to Figures 4 and 6, the partition frame 230 can be connected to the support member 211. Here, the support member 211 is connected to the lower frame 210 of the pack case 200, and referring to Figure 5, the partition frame 230 can be connected to and supported by the support member 211.

[0085] For example, referring together to Figures 6 and 8, the support member 211 can be positioned between the first plate 234 and the second plate 237 and can contact the second support base 238, and the second support base 238 and the support member 211 can be fastened and joined together by bolts (not shown).

[0086] In particular, even if the lower frame 210 or the bulkhead frame 230 is made of a material that is difficult to weld, the first bulkhead member 233 and the second bulkhead member 236 can be fastened together with bolts, and the second support base 238 and the support member 211 can also be fastened together with bolts, thus providing an advantage in that they can be easily joined.

[0087] In other words, as described above, the method in which the first partition member 233 includes a first plate 234 and a first support base 235, the second partition member 236 includes a second plate 237 and a second support base 238, the first support base 235 contacts the second support base 238 above the second support base 238 and is fastened with bolts, the support member 211 contacts the second support base 238, and the second support base 238 and the support member 211 are fastened with bolts, provides the effect of enabling connection to each other even when welding is difficult.

[0088] Referring to Figures 2 and 3, the reinforcing member 300 is inserted into the separated portion of the pack case 200. For example, the reinforcing member 300 may be positioned between the first side frame 225 and the second side frame 226 of the side frame 220, or between the first partition frame 231 and the second partition frame 232 of the partition frame 230.

[0089] The reinforcing member 300 reinforces the connecting member 400 when it connects the side first frame 225 and the side second frame 226, or when it connects the bulkhead first frame 231 and the bulkhead second frame 232.

[0090] Here, the reinforcing member 300 may be formed to have the same height as the side first frame 225 and the side second frame 226, or to have the same height as the partition wall first frame 231 and the partition wall second frame 232.

[0091] The connecting member 400 connects the pack case 200 and the reinforcing member 300. The connecting member 400 can also connect the side frame 220 or the bulkhead frame 230.

[0092] Referring to Figure 2, when the connecting member 400 connects to the side frame 220, the connecting member 400 may include a connecting portion 410 and a fastening portion 420. Here, the connecting portion 410 is connected to the first side frame 225, the reinforcing member 300, and the second side frame 226. Furthermore, a fastening groove 411 (see Figure 3) may be formed in the connecting portion 410.

[0093] Furthermore, the fastening portion 420 fastens the connecting portion 410. The fastening portion 420 can be of various types and may include, for example, a bolt 421 fastened to a fastening groove 411 of the connecting portion 410. Here, the bolt 421 may include a first bolt 422, a second bolt 423, and a third bolt 424.

[0094] The first bolt 422 fastens the side first frame 225 to the connection part 410. The second bolt 423 fastens the reinforcing member 300 to the connection part 410. The third bolt 424 fastens the side second frame 226 to the connection part 410.

[0095] In this way, when the connecting member 400 connects the first side frame 225, the reinforcing member 300, and the second side frame 226 of the side frame 220, it has the effect of maintaining rigidity even when the pack case 200 is separated to improve the space utilization rate of the battery pack 10.

[0096] Referring to Figure 2, when the connecting member 400 connects to the partition wall frame 230, the connecting member 400 may include a connecting portion 430 and a fastening portion 440. Here, the connecting portion 430 is connected to the first partition wall frame 231, the reinforcing member 300, and the second partition wall frame 232. Furthermore, a fastening groove 431 (see Figure 3) may be formed in the connecting portion 430.

[0097] Furthermore, the fastening portion 440 fastens the connecting portion 430. The fastening portion 440 can be of various types, and for example, it may include a bolt 441 fastened to a fastening groove 431 of the connecting portion 430. Here, the bolt 441 may include a first bolt 442, a second bolt 443, and a third bolt 444.

[0098] The first bolt 442 fastens the first bulkhead frame 231 to the connection part 430. The second bolt 443 fastens the reinforcing member 300 to the connection part 430. The third bolt 444 fastens the second bulkhead frame 232 to the connection part 430.

[0099] In this way, when the connecting member 400 connects the first partition frame 231, the reinforcing member 300, and the second partition frame 232 of the partition frame 230, it has the effect of maintaining rigidity even when the pack case 200 is separated in order to improve the space utilization rate of the battery pack 10.

[0100] Figure 10 is a diagram illustrating an automobile including a battery pack according to each embodiment of the present invention.

[0101] Referring to Figure 10, an automobile 20 according to one embodiment of the present invention may include one or more battery packs 10 according to the above-described embodiments. Here, the automobile 20 includes various automobiles that are equipped to use electricity, such as electric vehicles and hybrid vehicles.

[0102] In this specification, when terms indicating directions such as up, down, left, and right are used, these terms are for illustrative purposes only and it will be obvious to those skilled in the art that they may vary depending on the position of the object in question, the observer's position, etc.

[0103] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it goes without saying that any person with ordinary skill in the art to which the present invention belongs can make various modifications and variations within the equivalent scope of the claims below. Therefore, the embodiments disclosed above should be considered in an explanatory rather than restrictive sense. That is, the true scope of the present invention is shown in the claims, and all differences within the equivalent scope should be interpreted as being included in the present invention. [Industrial applicability]

[0104] The present invention relates to battery packs and automobiles including them, and is particularly applicable to industries related to secondary batteries.

Claims

1. Multiple battery cells, A pack case containing multiple of the aforementioned battery cells, with at least a portion of them separated, A reinforcing member inserted into the separated portion of the pack case, A battery pack including a connecting member that connects the pack case and the reinforcing member.

2. The aforementioned pack case includes a side frame, The aforementioned side frame is Side frame 1, It includes a second side frame separated from the first side frame, The battery pack according to claim 1, wherein the reinforcing member is disposed between the first side frame and the second side frame.

3. The aforementioned connecting member is The first side frame, the reinforcing member, and the connecting portion connected to the second side frame, The battery pack according to claim 2, further comprising a fastening portion for fastening the aforementioned connecting portion.

4. A fastening groove is formed in the aforementioned connecting portion. The fastening portion is a bolt fastened into the fastening groove, The aforementioned bolt is The first bolt fastens the side frame to the connecting portion, The reinforcing member and the second bolt fastening the connecting portion, The battery pack according to claim 3, further comprising a third bolt for fastening the side second frame and the connecting portion.

5. The aforementioned pack case includes a partition frame, The aforementioned partition frame is The first bulkhead frame, It includes a second partition frame separated from the first partition frame, The battery pack according to claim 1, wherein the reinforcing member is disposed between the first partition frame and the second partition frame.

6. The aforementioned connecting member is The first partition frame, the reinforcing member, and the connecting portion connected to the second partition frame, The battery pack according to claim 5, further comprising a fastening portion for fastening the aforementioned connecting portion.

7. A fastening groove is formed in the aforementioned connecting portion. The fastening portion is a bolt fastened into the fastening groove, The aforementioned bolt is The first bolt fastens the first frame of the partition wall to the connecting portion, The reinforcing member and the second bolt fastening the connecting portion, The battery pack according to claim 6, further comprising a third bolt for fastening the partition wall second frame to the connecting portion.

8. The aforementioned pack case includes a plurality of partition frames, The battery pack according to claim 1, wherein a plurality of the battery cells are arranged between a plurality of the partition frames.

9. The battery pack according to claim 8, wherein the plurality of partition frames are arranged in only one of the two directions: the horizontal or the vertical.

10. The aforementioned pack case includes multiple side frames, The multiple side frames are, Long side frame, Including a short-side frame with a shorter length, The battery pack according to claim 9, wherein the partition frame is arranged only in a direction parallel to the short side frame.

11. The aforementioned pack case includes a lower frame, Includes a support member connected to the lower frame, The battery pack according to claim 8, wherein the partition frame is coupled to the support member.

12. One of the multiple partition wall frames is A first partition wall member located on one side, The battery pack according to claim 11, further comprising a second partition member coupled to the first partition member.

13. The first partition member is, A first plate arranged vertically, The battery pack according to claim 12, further comprising a first support base coupled to the upper side of the first plate.

14. The second partition member is, A second plate arranged vertically, The battery pack according to claim 13, further comprising a second support base coupled to the intermediate portion of the second plate.

15. The first plate and the second plate are arranged to face each other. The battery pack according to claim 14, wherein the first support base contacts the second support base on the upper side of the second support base.

16. The battery pack according to claim 15, wherein the support member is positioned between the first plate and the second plate and in contact with the second support base.

17. An automobile comprising at least one battery pack according to any one of claims 1 to 16.

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