Battery pack and vehicle including same

Abstract

Disclosed are a battery pack and a vehicle including same. A battery pack according to an embodiment of the present invention comprises: a plurality of battery cells; a pack case having at least a portion separated and accommodating the plurality of battery cells; a reinforcing member which is inserted into the separated portion of the pack case; and a connecting member which connects the pack case and the reinforcing member to each other.

Description

Battery pack and vehicle including same

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

[0002] The 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.

[0003] Generally, secondary batteries refer to batteries 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, the most basic type of secondary battery, can provide an output voltage of approximately 2.5 V to 4.2 V.

[0004] Recently, as these battery cells are applied to devices that require high output voltage and large charging capacity, such as electric vehicles and Energy Storage Systems (ESS), battery modules composed of multiple battery cells connected in series, parallel, or a combination of series and parallel, and battery packs composed of these battery modules connected again in series, parallel, or a combination of series and parallel, are widely used.

[0005] Lithium secondary batteries are currently in the spotlight due to their advantages such as high operating voltage and significantly higher energy density. However, because they use organic electrolytes, there is a problem that lithium secondary batteries can cause overcurrent and overheating when overcharged, which in severe cases can cause fire due to explosion or ignition.

[0006] Various types of secondary batteries include battery modules in which a plurality of battery cells are stacked and inserted into a module case that is equipped with a module case that can protect the battery cells, and battery packs including a plurality of battery modules.

[0007] In recent years, for medium- to large-sized battery packs used in electric vehicles and other applications, including electric vehicles, it has become increasingly important to include a large number of battery cells to increase battery capacity. However, conventional technology has a problem: the limited space within the pack case is poorly utilized, making it difficult to increase battery capacity.

[0008] Accordingly, the technical problem to be achieved by the present invention is to provide a battery pack and a vehicle including the same that can improve the space utilization rate of the battery pack and thus increase the battery capacity.

[0009] In addition, to improve the space utilization of the battery pack, a battery pack and a vehicle including the same are provided that can maintain rigidity even when the pack case is separated.

[0010] In addition, it is to provide a battery pack and a vehicle including the same that can be easily joined by bolts even when welding is difficult.

[0011] However, the technical problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0012] According to one aspect of the present invention, a battery pack may be provided, including a plurality of battery cells; a pack case that accommodates the plurality of battery cells and from which at least some of the cells are separated; a reinforcing member inserted into a separated portion of the pack case; and a connecting member that connects the pack case and the reinforcing member.

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

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

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

[0016] In one embodiment, the pack case includes a bulkhead frame, the bulkhead frame including: a bulkhead first frame; and a bulkhead second frame separated from the bulkhead first frame, wherein the reinforcing member can be disposed between the bulkhead first frame and the bulkhead second frame.

[0017] In one embodiment, the connecting member may include a connecting portion coupled to the first bulkhead frame, the reinforcing member, and the second bulkhead frame; and a fastening portion fastening the connecting portion.

[0018] In one embodiment, the connecting portion may have a fastening groove formed therein, and the fastening portion may be a bolt fastened to the fastening groove, wherein the bolt may include a first bolt fastening the connecting portion with the first frame of the bulkhead; a second bolt fastening the connecting portion with the reinforcing member; and a third bolt fastening the connecting portion with the second frame of the bulkhead.

[0019] In one embodiment, the pack case includes a plurality of bulkhead frames, and the plurality of battery cells can be arranged between the plurality of bulkhead frames.

[0020] In one embodiment, the plurality of bulkhead frames may be arranged in only one of the horizontal and vertical directions.

[0021] In one embodiment, the pack case includes a plurality of side frames, the plurality of side frames including a long side frame and a short side frame, and the bulkhead frame can 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 bulkhead frame can be coupled to the support member.

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

[0024] In one embodiment, the first bulkhead member may include a first plate arranged vertically; and a first support member coupled to an upper side of the first plate.

[0025] In one embodiment, the second bulkhead member may include a second plate arranged vertically; and a second support member coupled to a middle 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 can contact the second support on the upper side of the second support.

[0027] In one embodiment, the support member is disposed between the first plate and the second plate and can be in contact with the second support.

[0028] Meanwhile, according to another aspect of the present invention, a vehicle including at least one battery pack as described above can be provided.

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

[0030] Additionally, it has the effect of maintaining rigidity even when the pack case is separated to improve space utilization of the battery pack.

[0031] Additionally, it has the effect of allowing easy joining by bolts even in cases where welding is difficult.

[0032] However, the effects that can be obtained through the present invention are not limited to the effects described above, and other technical effects not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0033] 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 idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0034] FIG. 1 is a perspective view of a battery pack according to one embodiment of the present invention.

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

[0036] Figure 3 is an enlarged view of part A of Figure 1, in which the bolt is separated from the fastening groove of the connecting portion.

[0037] Figure 4 illustrates the appearance of Figure 1 with some of the battery cell bulkhead frames removed.

[0038] Figure 5 shows the battery cell removed from Figure 1, with the bulkhead frame shown.

[0039] Figure 6 illustrates a portion of the bulkhead frame in Figure 1 separated.

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

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

[0042] FIG. 9 is an exploded perspective view of a bulkhead frame provided in a battery pack according to one embodiment of the present invention.

[0043] FIG. 10 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0044] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Terms or words used in this specification and claims should not be interpreted as limited to their conventional or dictionary meanings, but should be interpreted with meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to best explain his or her own invention. Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of ​​the present invention, and various equivalents and modified examples may exist as of the time of this application.

[0045] In the drawings, the sizes of each component or specific parts of that component are exaggerated, omitted, or schematically illustrated for convenience and clarity of explanation. Therefore, the size of each component does not entirely reflect its actual size. If a detailed description of a related known function or configuration is deemed to unnecessarily obscure the gist of the present invention, such description will be omitted.

[0046] The term 'joint' or 'connection' as used herein includes 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 through a connecting member.

[0047] FIG. 1 is a perspective view of a battery pack according to an embodiment of the present invention, FIG. 2 is a plan view of a battery pack according to an embodiment of the present invention, showing only a portion thereof, FIG. 3 is an enlarged view of part A of FIG. 1, showing that a bolt is separated from a fastening groove of a connecting portion, FIG. 4 is a view showing a state in which a portion of a battery cell blocking frame is removed from FIG. 1, and FIG. 5 is a view in which a battery cell is removed from FIG. 1, showing the blocking frame.

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

[0049] The battery cell (100) may come in 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 square battery cell. However, for convenience of explanation, the following description focuses on the case where the battery cell (100) is a pouch-type battery cell.

[0050] A plurality of battery cells (100) can be stacked on top of each other. The battery cells (100) can have various structures, and furthermore, the plurality of battery cells (100) can be stacked in various ways.

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

[0052] The battery cell (100) may be equipped with an electrode lead. The electrode lead is a type of terminal that is exposed to the outside and connected to an external device, and may be made of a conductive material. The electrode lead may include a positive electrode lead and a negative electrode lead.

[0053] The positive electrode lead and the negative electrode lead may be positioned in opposite directions with respect to the longitudinal direction of the battery cell (100), or the positive electrode lead and the negative electrode lead may be positioned in the same direction with respect to the longitudinal direction of the battery cell (100).

[0054] For example, the battery cell (100) may be accommodated in a module case (not shown), and the module case containing the battery cell (100) may be accommodated in a pack case (200) to form a battery pack (10). However, the present invention is not limited thereto, and the module case may be removed to reduce the weight and volume of the module case, in which case the battery cell (100) may be directly accommodated in the pack case (200) of the battery pack (10).

[0055] According to this method, more battery cells (100) can be stored in the space previously occupied by the module case of the battery module within the battery pack (10), thereby increasing space efficiency and improving battery capacity.

[0056] For convenience of explanation, the following description focuses on a case where a battery cell (100) is directly housed in a pack case (200) without a module case. However, an embodiment using a module case is not completely excluded, and, if necessary, a pouch-type battery cell (100) of each embodiment of the present invention may be configured to be housed in a module case provided in a battery module.

[0057] Here, a cell cover (not shown) may be provided to support the battery cell (100) so that the battery cell (100) can be directly stored in the pack case (200). The cell cover may have various shapes, and for example, may be configured in an 'n' shape, a 'u' shape, or a 'ㄷ' shape surrounding three sides of at least one battery cell (100). However, the present invention is not limited thereto.

[0058] In addition, the battery pack (10) according to the present embodiment may include, for example, a control module configured to control charging and discharging of pouch-type battery cells (100). This control module may include, for example, a battery management system (BMS) and a battery disconnect unit, and may be housed inside a pack case (200) together with the battery cells (100) and cell covers.

[0059] Referring to FIG. 1, a plurality of battery cells (100) are stored in a pack case (200), and at least a portion of the pack case (200) is separated.

[0060] The pack case (200) may be configured to include, for example, a lower frame (210), a side frame (220), and a bulkhead frame (230). Here, the pack case (200) may include a plurality of side frames (220). In addition, the pack case (200) may include a plurality of bulkhead frames (230).

[0061] The lower frame (210) is configured to accommodate multiple battery modules. The lower frame (210) may be formed in a square plate shape, but is not limited thereto. 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 preset space between it and the lower frame (210).

[0063] And, a plurality of battery cells (100) are installed in the space between the side frame (220) and the lower frame (210). The side frames (220) may be provided in plurality, and referring to FIGS. 1 and 2, the plurality of side frames (220) may include a long side frame (221) having a relatively long length and a short side frame (222) having a relatively short length. Alternatively, the lengths of the side frames (220) may all be the same.

[0064] When there are multiple side frames (220), one side frame (220) among the multiple side frames (220) may include a first side frame (225) and a second side frame (226). Referring to FIG. 2, the short-side side frame (222) is configured to include the first side frame (225) and the second side frame (226), but is not limited thereto, and the long-side 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 bulkhead frame (230) may be different. However, for convenience of explanation, the following description will be given of a case where the short-side side frame (222) includes the first side frame (225) and the second side frame (226).

[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 be formed symmetrically to each other, but are not necessarily limited thereto.

[0066] In addition, a reinforcing member (300) may be placed between the first side frame (225) and the second side frame (226). Here, a connecting member (400) may connect the first side frame (225), the reinforcing member (300), and the second side frame (226). A detailed description of the connecting member (400) will be described later.

[0067] Referring to FIGS. 1 and 3, the bulkhead frame (230) is coupled to the side frame (220) and the lower frame (210). In addition, the bulkhead frame (230) may be provided in multiple numbers, and a plurality of battery cells (100) may be arranged between the plurality of bulkhead frames (230). That is, the bulkhead frame (230) is interposed between the plurality of battery cells (100).

[0068] Referring to FIG. 2, when there are multiple bulkhead frames (230), one of the multiple bulkhead frames (230) may include a first bulkhead frame (231) and a second bulkhead frame (232).

[0069] In addition, the first bulkhead frame (231) and the second bulkhead frame (232) are separated from each other. The adjacent battery cells (100) are separated from each other to prevent short circuits due to various terminals, and correspondingly, the first bulkhead frame (231) and the second bulkhead frame (232) may also be separated from each other. Here, the first bulkhead frame (231) and the second bulkhead frame (232) may be formed symmetrically to each other, but are not necessarily limited thereto.

[0070] In addition, a reinforcing member (300) may be placed between the first bulkhead frame (231) and the second bulkhead frame (232). Here, a connecting member (400) may connect the first bulkhead frame (231), the reinforcing member (300), and the second bulkhead frame (232). A detailed description of the connecting member (400) will be described later.

[0071] The bulkhead frames (230) can be arranged in only one direction. For example, when the side frames (220) include a long side frame (221) and a short side frame (222), the plurality of bulkhead frames (230) can be arranged in only one direction among the horizontal direction and the vertical direction.

[0072] Of course, even if the lengths of all side frames (220) are the same, the plurality of bulkhead frames (230) can be arranged in only one direction among the horizontal direction and the vertical direction. However, for convenience of explanation, the following description will be made of a case where the side frame (220) includes a long side frame (221) and a short side frame (222).

[0073] For example, referring to FIG. 1 and FIG. 5 together, the bulkhead frame (230) is arranged only in a direction parallel to the X direction with reference to FIG. 5, and not in a direction parallel to the Y direction. That is, the bulkhead frame (230) can be arranged only in a direction parallel to the short-side side frame (222), and not in a direction parallel to the long-side side frame (221).

[0074] Referring to FIG. 2, since the battery cells (100) can be arranged in a space (S, for example, a space formed in the center parallel to the long side frame (221) between neighboring bulkhead frames (230) arranged to face each other in a direction parallel to the short side frame (222)) in which the bulkhead frames (230) can be arranged in a direction parallel to the long side frame (221), more battery cells (100) can be arranged compared to a conventional battery pack (10), thereby improving the space utilization of the battery pack (10) and thus increasing the battery capacity.

[0075] However, in order to prevent short circuits between various terminals connected to the battery cells (100), a certain amount of space is required between the battery cells (100), but this space can be much narrower than the space occupied by the bulkhead frame (230) arranged in a direction parallel to the conventional long side frame (221), so there is an effect of improving the space utilization rate described above.

[0076] FIG. 6 is a perspective view of a portion of the bulkhead frame in FIG. 1 separated, FIG. 7 is a perspective view of a bulkhead frame provided in a battery pack according to one embodiment of the present invention, FIG. 8 is a view viewed along the direction of arrow B in FIG. 7, and FIG. 9 is an exploded perspective view of a bulkhead frame provided in a battery pack according to one embodiment of the present invention.

[0077] Referring to FIGS. 6 to 9, the bulkhead frame (230) may be configured to include a first bulkhead member (233) and a second bulkhead member (236).

[0078] The first bulkhead member (233) is located on one side. In FIG. 8, the first bulkhead member (233) is located on the left side (left side based on the Y direction of FIG. 8) based on FIG. 8, but the first bulkhead member (233) may also be located on the right side based on FIG. 8. In other words, the side where the first bulkhead member (233) is located may correspond to both the left and right sides.

[0079] The first bulkhead member (233) may include a first plate (234) and a first support member (235). The first plate (234) may be arranged in a vertical direction (Z direction of FIG. 8) based on FIG. 8. In addition, the first support member (235) may be coupled to the upper side of the first plate (234) (see FIG. 9).

[0080] The second bulkhead member (236) is connected to the first bulkhead member (233). The second bulkhead member (236) is located on the other side of the first bulkhead member (233). In Fig. 8, the second bulkhead member (236) is located on the right side (on the right side in the Y direction of Fig. 8) based on Fig. 8, but the second bulkhead member (236) may also be located on the left side based on Fig. 8. In other words, the other side where the second bulkhead member (236) is located may correspond to both the right and the left.

[0081] The second bulkhead member (236) may include a second plate (237) and a second support member (238). The second plate (237) may be arranged in a vertical direction (Z direction of FIG. 8) based on FIG. 8. In addition, the second support member (238) may be coupled to the middle portion of the second plate (237) (see FIG. 9).

[0082] Referring to FIGS. 7 and 8, the first plate (234) and the second plate (237) may be arranged to face each other. In addition, when the first plate (234) and the second plate (237) are arranged to face each other, the first support (235) may be configured to contact the second support (238) on the upper side of the second support (238).

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

[0084] And, referring to FIGS. 4 and 6 together, the bulkhead frame (230) can be coupled to the support member (211). Here, the support member (211) can be coupled to the lower frame (210) of the pack case (200), and referring to FIG. 5, the bulkhead frame (230) can be coupled to and supported by the support member (211).

[0085] For example, referring to FIGS. 6 and 8 together, the support member (211) may be placed between the first plate (234) and the second plate (237) and may be in contact with the second support member (238), and the second support member (238) and the support member (211) may be fastened and connected by a bolt (not shown).

[0086] In particular, even when 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) are fastened by bolts, and the second support member (238) and the support member (211) are also fastened by bolts, so that they can be easily joined.

[0087] That is, as described above, the first bulkhead member (233) includes a first plate (234) and a first support member (235), the second bulkhead member (236) includes a second plate (237) and a second support member (238), and the first support member (235) is in contact with the second support member (238) on the upper side of the second support member (238) and is fastened with a bolt, and the support member (211) is in contact with the second support member (238) and the second support member (238) and the support member (211) are fastened with a bolt, which provides an effect that allows for joining to each other even when welding is difficult.

[0088] Referring to FIGS. 2 and 3, the reinforcing member (300) is inserted into a separated portion of the pack case (200). For example, the reinforcing member (300) may be placed between the first side frame (225) and the second side frame (226) among the side frames (220), or may be placed between the first bulkhead frame (231) and the second bulkhead frame (232) among the bulkhead frames (230).

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

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

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

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

[0093] And, the fastening part (420) fastens the connecting part (410). The fastening part (420) may be various, and may include, for example, a bolt (421) fastened to a fastening groove (411) of the connecting part (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) connects the first side frame (225) and the connecting portion (410). The second bolt (423) connects the reinforcing member (300) and the connecting portion (410). The third bolt (424) connects the second side frame (226) and the connecting portion (410).

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

[0096] And, referring to FIG. 2, when the connecting member (400) connects the bulkhead frame (230), the connecting member (400) may include a connecting portion (430) and a fastening portion (440). Here, the connecting portion (430) is coupled to the bulkhead first frame (231), the reinforcing member (300), and the bulkhead second frame (232). And, a fastening groove (431, see FIG. 3) may be formed in the connecting portion (430).

[0097] And, the fastening part (440) fastens the connecting part (430). The fastening part (440) may be various, and may include, for example, a bolt (441) fastened to a fastening groove (431) of the connecting part (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) connects the first bulkhead frame (231) and the connection (430). The second bolt (443) connects the reinforcing member (300) and the connection (430). The third bolt (444) connects the second bulkhead frame (232) and the connection (430).

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

[0100] FIG. 10 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0101] Referring to FIG. 10, a vehicle (20) according to one embodiment of the present invention may include one or more battery packs (10) according to each of the embodiments described above. Here, the vehicle (20) includes various types of vehicles that are designed to use electricity, such as electric vehicles or hybrid vehicles.

[0102] In this specification, when terms indicating directions such as up, down, left, and right are used, these terms are only for convenience of explanation, and it is obvious to those skilled in the art that these terms may vary depending on the location of the target object or the location of the observer.

[0103] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and those skilled in the art to which the present invention pertains may make various modifications and variations within the scope of the technical spirit of the present invention and the equivalent scope of the claims to be described below. Therefore, the embodiments disclosed above should be considered in an illustrative rather than a restrictive sense. In other words, the true scope of the technical spirit of the present invention is set forth in the claims, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

[0104] The present invention relates to a battery pack and an automobile including the same, and is particularly applicable to industries related to secondary batteries.

Claims

1. Multiple battery cells; A pack case that houses the plurality of battery cells, at least some of which are separated; A reinforcing member inserted into a separated portion of the above pack case; and A battery pack including a connecting member connecting the pack case and the reinforcing member.

2. In paragraph 1, The above pack case includes a side frame, The above side frame, Side first frame; and It includes a second side frame separated from the first side frame, A battery pack characterized in that the reinforcing member is placed between the first side frame and the second side frame.

3. In paragraph 2, The above connecting member is, A connecting portion coupled to the first side frame, the reinforcing member, and the second side frame; and A battery pack characterized by including a fastening member for fastening the above-mentioned connecting member.

4. In paragraph 3, A fastening groove is formed in the above connecting portion, The above fastening part is a bolt fastened to the above fastening groove, The above bolts, A first bolt connecting the first side frame and the connecting portion; A second bolt connecting the reinforcing member and the connecting portion; and A battery pack characterized by including a third bolt for connecting the second side frame and the connecting portion.

5. In paragraph 1, The above pack case includes a bulkhead frame, The above bulkhead frame, Bulkhead first frame; and It includes a second bulkhead frame separated from the first bulkhead frame, A battery pack characterized in that the reinforcing member is placed between the first bulkhead frame and the second bulkhead frame.

6. In paragraph 5, The above connecting member is, A connecting portion connected to the first bulkhead frame, the reinforcing member, and the second bulkhead frame; and A battery pack characterized by including a fastening member for fastening the above-mentioned connecting member.

7. In paragraph 6, A fastening groove is formed in the above connecting portion, The above fastening part is a bolt fastened to the above fastening groove, The above bolts, A first bolt connecting the first bulkhead frame and the connecting portion; A second bolt connecting the reinforcing member and the connecting portion; and A battery pack characterized by including a third bolt connecting the second bulkhead frame and the connecting portion.

8. In paragraph 1, The above pack case comprises a plurality of bulkhead frames, A battery pack characterized in that the plurality of battery cells are arranged between the plurality of bulkhead frames.

9. In paragraph 8, A battery pack characterized in that the plurality of bulkhead frames are arranged in only one of the horizontal and vertical directions.

10. In paragraph 9, The above pack case comprises a plurality of side frames, The above plurality of side frames are, Long side frame with long sides; and Includes a short side frame, A battery pack characterized in that the bulkhead frame is arranged only in a direction parallel to the short side frame.

11. In paragraph 8, The above pack case includes a lower frame, Including a support member coupled to the above lower frame, A battery pack characterized in that the bulkhead frame is coupled to the support member.

12. In paragraph 11, One of the above plurality of bulkhead frames is, A first bulkhead member located on one side; and A battery pack characterized by including a second bulkhead member coupled to the first bulkhead member.

13. In paragraph 12, The above first bulkhead member, a first plate arranged vertically; and A battery pack characterized by including a first support member coupled to the upper side of the first plate.

14. In paragraph 13, The above second bulkhead member, a second plate arranged vertically; and A battery pack characterized by including a second support member coupled to the middle portion of the second plate.

15. In paragraph 14, The first plate and the second plate are arranged to face each other, A battery pack characterized in that the first support is in contact with the second support on the upper side of the second support.

16. In paragraph 15, A battery pack, characterized in that the support member is disposed between the first plate and the second plate and is in contact with the second support member.

17. A vehicle comprising at least one battery pack according to any one of claims 1 to 16.

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