Battery pack, and electronic device and vehicle that include the same

Abstract

To provide a battery pack in which the number of components is reduced and energy density and manufacturing efficiency are enhanced.SOLUTION: There is disclosed a battery pack in which the number of components is reduced and energy density and manufacturing efficiency are enhanced. A battery pack includes a plurality of battery cells configured to stand in a vertical direction with electrode terminals located at an upper portion thereof, the plurality of battery cells being arranged in at least one direction; and a pack housing having an accommodation space to accommodate the plurality of battery cells such that a lower portion of each of the battery cells is bonded to an inner surface of the pack housing.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a battery pack, an electronic device and an automobile including the same, and more particularly to a battery pack with a reduced number of parts and improved energy density and manufacturing efficiency.

[0002] This application claims priority to Korean Patent Application No. 10-2020-0073140, filed on June 16, 2020, the entire contents of which are incorporated herein by reference in their entirety in the specification and drawings. [Background technology]

[0003] In recent years, as the demand for portable electronic products such as laptops, video cameras, and mobile phones has increased dramatically and the development of electric vehicles, energy storage batteries, robots, satellites, and the like has been fully underway, active research has been conducted into high-performance secondary batteries that can be repeatedly charged and discharged.

[0004] Currently, secondary batteries such as nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries are commercially available. Among them, lithium secondary batteries are attracting attention due to their advantages over nickel-based secondary batteries, such as almost no memory effect, freedom of charging and discharging, a very low self-discharge rate, and high energy density.

[0005] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive and negative active materials, respectively, and include an electrode assembly in which a positive electrode plate coated with a positive electrode active material and a negative electrode plate coated with a negative electrode active material are disposed with a separator interposed therebetween, and an exterior material, such as a battery case, that seals and houses the electrode assembly together with an electrolyte.

[0006] Depending on the shape of the exterior material, lithium secondary batteries can be classified into can-type secondary batteries, in which the electrode assembly is housed in a metal can, and pouch-type secondary batteries, in which the electrode assembly is housed in a pouch made of an aluminum laminate sheet.

[0007] Among them, the can-type secondary battery may have a cylindrical metal can in which an electrode assembly is housed. A conventional battery module may include a module case that houses a plurality of secondary batteries, and a bus bar configured to electrically connect the plurality of can-type secondary batteries.

[0008] In addition, conventionally, a battery pack is manufactured by first accommodating a plurality of such secondary batteries inside a module case, further accommodating the module case accommodating the plurality of secondary batteries in a pack housing, and then combining the pack housing and the module case.

[0009] However, when a battery pack includes both a module case and a pack housing, the energy density of the pack decreases, the manufacturing process becomes complicated, and the manufacturing cost increases. Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been made to solve the above problems, and an object of the present invention is to provide a battery pack with a reduced number of parts and improved energy density and manufacturing efficiency.

[0011] Other objects and advantages of the present invention can be understood from the following description and will become more apparent from the embodiments of the present invention. Also, the objects and advantages of the present invention can be realized by the means and combinations thereof as set forth in the claims. [Means for solving the problem]

[0012] In order to achieve the above object, a battery pack according to one aspect of the present invention comprises: A plurality of battery cells arranged in at least one direction, the battery cells being vertically erected with electrode terminals located at the top; a pack housing having an accommodation space for accommodating a plurality of battery cells, the lower portions of each of the plurality of battery cells being bonded to an inner surface thereof; Includes.

[0013] The pack housing may also include a plurality of fixing protrusions containing an adhesive, into which the lower portions of the plurality of battery cells are inserted.

[0014] Furthermore, the inside of the pack housing may be filled with a filler material so as to surround each side of the multiple battery cells.

[0015] The pack housing may include a lower frame that houses the plurality of battery cells therein, and an upper frame that is coupled to the lower frame and is positioned above the plurality of battery cells.

[0016] The battery pack may further include a plurality of bus bars mounted on the upper frame, the bus bars being configured to respectively contact electrode terminals of the plurality of battery cells, and the bus bars may be provided with a plurality of conductive wires.

[0017] Furthermore, the upper frame may be provided with protrusions that protrude toward the electrode terminals so as to cover a portion of each of the electrode terminals of the plurality of battery cells.

[0018] The battery pack may further include a reinforcing member fixed to at least one of an inner lower surface, an inner upper surface, and an inner side surface of the pack housing.

[0019] Furthermore, the reinforcing member is a main body portion extending toward an inner side surface; a bent portion bent from each of both ends of the main body portion so as to face an inner side surface of the pack housing and joined to the inner side surface of the pack housing; It may comprise:

[0020] In addition, the reinforcing member is a receiving groove in which a part of the main body is recessed inward so that a filler can be filled therein; a coupling hole formed by punching out a portion of the folded portion to receive a filler; It may comprise:

[0021] Further, the reinforcing member includes a pair of plates each extending in one direction and spaced apart from each other by a predetermined distance to form a spaced apart space; The pair of plates each have an opening configured to allow an internal space between the pair of plates to communicate with the outside; The internal space between the pair of plates may be filled with a filler material.

[0022] To achieve the above object, an electronic device according to another aspect of the present invention includes the above-mentioned battery pack.

[0023] In order to achieve the above object, a vehicle according to yet another aspect of the present invention includes the above-mentioned battery pack. Effect of the Invention

[0024] According to one aspect of the present invention, a pack housing that contains a plurality of battery cells and has a lower portion of each of the plurality of battery cells bonded to an inner surface is included, so that the lower portions of the plurality of battery cells can be directly fixed to the pack housing without a separate module case, thereby simplifying the manufacturing process, reducing the number of parts, increasing energy density, and further reducing manufacturing costs.

[0025] Furthermore, according to one aspect of the present invention, the inside of the pack housing is filled with a filler material so as to surround each side of the plurality of battery cells, thereby preventing short circuits between the plurality of battery cells. Furthermore, if any of the plurality of battery cells ignites due to an external impact or abnormal operation during use of the battery pack, causing an explosion and flames from the side of the battery can, it is possible to prevent the flames and high-temperature gases from being transferred to the plurality of battery cells adjacent to the ignited battery cell, causing thermal runaway and chain ignition. In other words, the filler material can play a role in blocking heat transfer between the plurality of battery cells.

[0026] According to one aspect of the present invention, the pack housing further includes a reinforcing member fixed to at least one of an inner lower surface, an inner upper surface, and an inner side surface, thereby effectively preventing deformation of the pack housing due to vibration or external impact. That is, the reinforcing member can prevent deformation of the pack housing due to the load of the multiple battery cells. In particular, the reinforcing member can effectively prevent deformation of the pack housing in the vertical direction.

[0027] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical ideas of the present invention. Therefore, the present invention should not be interpreted as being limited only to the matters described in the drawings. [Brief description of the drawings]

[0028] [Figure 1] 1 is a perspective view illustrating a battery pack according to an embodiment of the present invention; [Diagram 2] 1 is an exploded perspective view showing a schematic configuration of a battery pack according to an embodiment of the present invention; [Diagram 3] FIG. 13 is a plan view illustrating a schematic configuration of a portion of a battery pack according to another embodiment of the present invention. [Figure 4] FIG. 4 is a schematic vertical cross-sectional view taken along line CC' in FIG. [Diagram 5]FIG. 11 is a perspective view illustrating a schematic configuration of a portion of a battery pack according to another embodiment of the present invention. [Figure 6] 1 is a partial plan view illustrating a schematic configuration of a battery pack according to an embodiment of the present invention; [Figure 7] 1 is a partial plan view illustrating a schematic configuration of a battery pack according to an embodiment of the present invention; [Figure 8] FIG. 13 is a plan view illustrating a schematic configuration of a portion of a battery pack according to another embodiment of the present invention. [Figure 9] 11 is a partial perspective view illustrating a reinforcement member of a battery pack according to another embodiment of the present invention. FIG. [Figure 10] 11 is a perspective view illustrating a reinforcement member of a battery pack according to another embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms and words used in the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as having meanings and concepts corresponding to the technical ideas of the present invention, in accordance with the principle that the inventor himself can appropriately define the concepts of terms in order to best describe the invention.

[0030] Therefore, it should be understood that the embodiment described in this specification and the configurations shown in the drawings are merely the most preferred embodiment of the present invention and do not represent the entire technical idea of ​​the present invention, and that there may be various equivalents and modifications that can be substituted for them at the time of this application.

[0031] Fig. 1 is a perspective view showing a battery pack according to an embodiment of the present invention, and Fig. 2 is an exploded perspective view showing a configuration of a battery pack according to an embodiment of the present invention. For reference, the X-axis direction in Fig. 1 is the right direction, the Y-axis direction is the rear direction, and the Z-axis direction is the upward direction.

[0032] 1 and 2, in the present invention, a battery pack 200 may include a plurality of battery cells 100 and a pack housing 210.

[0033] Here, the battery cell 100 may be in a vertically standing form. An electrode terminal may be provided on the upper portion of the battery cell 100.

[0034] Specifically, the battery cell 100 may be a cylindrical battery cell. The battery cell 100 may include a battery can 116 and an electrode assembly (not shown) housed inside the battery can 116. A negative electrode terminal 112 may be formed on a body of the battery can 116, and a positive electrode terminal 111 may be formed on a battery cap coupled to an upper portion of the battery can 116.

[0035] Furthermore, the plurality of battery cells 100 may be arranged in at least one direction. The plurality of battery cells 100 may be arranged spaced apart at a predetermined interval. For example, when viewed from the F direction in FIG. 1, the plurality of battery cells 100 may be arranged in the front-rear direction and the left-right direction.

[0036] Meanwhile, in this specification, terms indicating directions such as front, back, left, right, up, and down may change depending on the position of the observer or the shape of the object. However, for the sake of convenience, in this specification, directions such as front, back, left, right, up, and down are indicated based on the view from the F direction.

[0037] Furthermore, the multiple battery cells 100 may be arranged to be spaced apart by, for example, about 3 mm. Also, the multiple battery cells 100 located in one row may be arranged such that their positions in the front-to-back direction are shifted from the multiple battery cells 100 located in another row. And the multiple battery cells 100 located in one column may be arranged such that their positions in the left-to-right direction are shifted from the multiple battery cells 100 located in another column. That is, it can be said that the multiple battery cells 100 are generally arranged in a zigzag pattern front-to-back and left-to-right.

[0038] Furthermore, the pack housing 210 may have an accommodation space for accommodating the plurality of battery cells 100. Referring to Fig. 2, the pack housing 210 may form an internal space capable of accommodating the plurality of battery cells 100 therein.

[0039] Specifically, the pack housing 210 may include an internal top wall, an internal side wall, and an internal bottom wall. The lower portions of the plurality of battery cells 100 may be adhered to the upper surface of the bottom wall. In this case, the lower portions of the battery cells 100 may be adhered to the inner bottom surface 214a of the pack housing 210 using an adhesive 230.

[0040] Specifically, the adhesive 230 may be an adhesive 230 that is injected into the inside of the pack housing 210 and then solidified. The adhesive 230 may have electrical insulation properties. The adhesive 230 may be a glue or a hot-melt resin. For example, the adhesive 230 may include at least one of a polyamide resin, a polyimide resin, an epoxy resin, and an acrylic resin.

[0041] Therefore, according to this configuration of the present invention, by including a pack housing 210 that accommodates a plurality of battery cells 100 and has the lower portions of each of the plurality of battery cells 100 bonded to its inner surface, the lower portions of the plurality of battery cells 100 can be directly fixed to the pack housing 210 without a separate module case, thereby simplifying the manufacturing process, reducing the number of parts, increasing energy density, and further reducing manufacturing costs.

[0042] FIG. 3 is a plan view showing a schematic configuration of a portion of a battery pack according to another embodiment of the present invention, and FIG. 4 is a schematic vertical cross-sectional view taken along line CC' in FIG.

[0043] 3 and 4 together with Fig. 2, a plurality of fixing protrusions P configured to receive lower portions of the plurality of battery cells 100 may be provided on the inner bottom surface of the pack housing 210. The fixing protrusions P may have a shape that protrudes (upward) from the inner surface of the pack housing 210 toward the battery cells 100 so as to guide the placement positions of the plurality of battery cells 100.

[0044] That is, the fixing protrusion P may be circular in plan view so as to surround the outer periphery of the lower end of the battery cell 100. Furthermore, one battery cell 100 may be mounted inside the circular fixing protrusion P.

[0045] Additionally, the fixing protrusion P may contain an adhesive 230. The adhesive 230 may be configured to bond between the lower portion of each of the plurality of battery cells 100 and the inner surface of the fixing protrusion P.

[0046] Therefore, according to such a configuration of the present invention, by providing the fixing protrusions P on the inner surface of the pack housing 210, not only does it become easier to arrange the multiple battery cells 100 in the correct position, but it also increases the adhesive area between the inner surface of the pack housing 210 and the multiple battery cells 100, thereby effectively improving the adhesive strength.

[0047] Furthermore, the adhesive 230 can be contained in the fixing protrusions P, and a plurality of battery cells 100 can be fixed using a small amount of adhesive 230 without waste. This allows the manufacturing cost of the battery pack 200 to be reduced.

[0048] FIG. 5 is a perspective view illustrating a schematic configuration of a portion of a battery pack according to another embodiment of the present invention.

[0049] 5 together with FIG. 2, the pack housing 210 of the battery pack 200 of the present invention may further include a filler 240 filled therein. The pack housing 210 may be filled with the filler 240 so as not to cover the electrode terminals located at the upper portions of the battery cells 100. That is, the filler 240 may be filled inside the pack housing 210 so as to surround the horizontal sides of the battery cells 100.

[0050] Additionally, the filler material 240 may be a polymeric resin configured to harden after being filled inside the pack housing 210. For example, the filler material 240 may be an epoxy resin.

[0051] Therefore, according to this configuration of the present invention, the filler 240 is filled inside the pack housing 210 so as to surround the sides of the plurality of battery cells 100, thereby preventing short circuits between the plurality of battery cells 100. Furthermore, if any of the plurality of battery cells 100 ignites due to an external impact or abnormal operation during use of the battery pack 200, causing an explosion and flames from the side of the battery can, it is possible to prevent in advance the transmission of flames or high-temperature gas to the plurality of battery cells 100 adjacent to the ignited battery cell 100, causing thermal runaway or chain ignition. In other words, the filler 240 can play a role in blocking heat transfer between the plurality of battery cells 100.

[0052] 1 and 2, the pack housing 210 of the present invention may include a lower frame 214 and an upper frame 212. Specifically, the lower frame 214 may include a lower wall 214c to which the plurality of battery cells 100 are fixed, and a side wall 214d extending upward from the outer periphery of the lower wall 214c, so as to form an accommodation space for accommodating the plurality of battery cells 100 therein. The height of the side wall 214d corresponds to the height of the battery cells 100.

[0053] The multiple battery cells 100 are fixed to the inner bottom surface 214a of the lower frame 214, i.e., the upper surface of the lower wall 214c. The lower frame 214 is filled with a filler 240, and the filler 240 is interposed between the multiple battery cells 100 fixed on the lower frame 214. The filler 240 is filled so as not to cover the positive electrode terminals 111 and negative electrode terminals 112 provided at the upper ends of the battery cells 100.

[0054] Also, the upper frame 212 is coupled onto the lower frame 214 filled with the filler 240. That is, the upper frame 212 may be coupled to an upper end of the side wall 214d of the lower frame 214. The upper frame 212 may be located on top of the multiple battery cells 100.

[0055] Fig. 6 is a partial plan view showing a schematic configuration of a battery pack according to an embodiment of the present invention. In order to show the state in which the bus bar 250 and the multiple battery cells 100 are electrically connected to each other, only the bus bar 250 and the multiple battery cells 100 are shown in Fig. 6, and other configurations are not shown.

[0056] 6 together with FIG. 2, the battery pack 200 of the present invention may further include a plurality of bus bars 250. The bus bars 250 may be configured to electrically connect between the plurality of battery cells 100. The bus bars 250 may include a conductive metal. The bus bars 250 may include at least one of copper, nickel, and aluminum, for example.

[0057] Furthermore, a plurality of bus bars 250 may be mounted on the upper frame 212. The bus bars 250 may be configured to contact electrode terminals of the plurality of battery cells 100, respectively. For example, the bus bars 250 may include a body plate 251 extending long along the plurality of battery cells 100, and a plurality of conductive wires 252.

[0058] Furthermore, the upper frame 212 may be provided with punched-out exposed portions T2 so that the upper portions of the multiple battery cells 100 are exposed to the outside.

[0059] The body plate 251 and the conductive wire 252 may be connected to each other. The conductive wire 252 may contact the positive terminal 111 or the negative terminal 112 formed on the upper part of the plurality of battery cells 100 through the exposed part T2 of the upper frame 212. The bus bar 250 may electrically connect the plurality of battery cells 100 in series and / or in parallel.

[0060] The battery cell 100 of the present invention has a structure in which a pair of electrode terminals 111, 112 are provided in the same direction. Such a structure can simplify electrical connection. In addition, such a structure makes it possible to apply a structure in which the surface opposite to the surface on which the electrode terminals 111, 112 are formed is directly bonded to the cooling frame 260. As described above, the positive electrode terminal 111 and the negative electrode terminal 112 of the battery cell 100 applied to the present invention are all provided on one side of the battery cell 100. For example, when the battery cell 100 is a cylindrical battery cell, the peripheral area of ​​the upper end of the battery can 116 functions as the negative electrode terminal 112, and the battery cap covering the upper opening of the battery can 116 functions as the positive electrode terminal 111. The peripheral area of ​​the upper end of the battery can 116 may refer to, for example, the upper surface of a crimping portion formed to cover the upper opening of the battery can 116 and fix the battery cap that functions as the positive electrode terminal 111.

[0061] Therefore, according to this configuration of the present invention, the bus bar 250 includes a plurality of conductive wires 252, and thus can precisely contact the electrode terminals 111, 112 provided on the upper portions of the plurality of battery cells 100. That is, the bus bar 250 needs to be configured so as not to cause a short circuit between the plurality of battery cells 100. However, if the distance between the positive electrode terminals 111 and the negative electrode terminals 112 of the plurality of battery cells 100 is very close, a precise connection operation between the bus bar 250 and the electrode terminals is required. According to the present invention, the bus bar 250 can precisely connect the electrode terminals through the conductive wires, and the occurrence of an explosion or fire due to a short circuit can be reduced.

[0062] 1 and 2, the battery pack of the present invention may further include an upper cover 216. The upper cover 216 may cover the upper portions of the bus bars 250 to prevent other conductive conductors from contacting the bus bars 250. The upper cover 216 may be in the form of a plate extending horizontally.

[0063] FIG. 7 is a partial plan view illustrating a schematic configuration of a battery pack according to one embodiment of the present invention.

[0064] 2 and 6, the upper frame 212 of the pack housing 210 of the present invention may include a protrusion K configured to cover a portion of the electrode terminals of the multiple battery cells 100. That is, the protrusion K may protrude so as to cover a portion of the positive terminal 111 and / or the negative terminal 112. The protrusion K may have a shape that protrudes toward the electrode terminals within the exposed portion T2.

[0065] 7, one of the plurality of protrusions K may have a shape that protrudes and extends so that a portion of the negative electrode terminal 112 provided on the upper portion of the battery cell 100 is not exposed to the upper portion, and the other may have a shape that protrudes and extends so that a portion of the positive electrode terminal 111 provided on the upper portion of the battery cell 100 is not exposed to the upper portion.

[0066] For example, a portion of the upper frame 212 adjacent to a conductive wire 252 of the busbar 250 that needs to contact the positive terminal 111 may be provided with a protrusion K that protrudes to cover a portion of the negative terminal 112 to reduce the possibility of the conductive wire 252 coming into contact with the negative terminal 112.

[0067] Conversely, another portion of the upper frame 212 adjacent to the conductive wire 252 of the bus bar 250 that needs to contact the negative terminal 112 may be provided with a protrusion K that protrudes to cover a portion of the positive terminal 111 in order to reduce the possibility of the conductive wire 252 coming into contact with the positive terminal 111.

[0068] Therefore, according to this configuration of the present invention, the upper frame 212 is provided with the protrusions K that protrude toward the electrode terminals so as to cover a portion of the electrode terminals of the plurality of battery cells 100, thereby effectively reducing the risk of short-circuiting between the battery cells 100 that may occur during the operation of connecting the bus bar 250 to the electrode terminals. This improves the manufacturing efficiency of the battery pack 200 and effectively reduces the occurrence of accidents during the manufacturing process.

[0069] FIG. 8 is a plan view illustrating a schematic configuration of a portion of a battery pack according to another embodiment of the present invention.

[0070] 8 together with FIG. 2, the battery pack 200 of the present invention may further include a reinforcing member 220. Specifically, the reinforcing member 220 may be located inside the pack housing 210. The reinforcing member 220 may be fixed to the inner surface of the pack housing 210. Here, the method of fixing the reinforcing member 220 to the pack housing 210 may be various, and may be, for example, welding, adhesion, etc. The reinforcing member 220 may be a metal having excellent mechanical rigidity. For example, the reinforcing member 220 may be stainless steel, steel, aluminum alloy, etc.

[0071] In particular, the reinforcing member 220 may be fixed to one or more of an inner lower surface, an inner upper surface, and an inner side surface of the pack housing 210. For example, the reinforcing member 220 may extend so as to traverse the inside of the pack housing 210 in the left-right direction. An upper portion of the reinforcing member 220 may be fixed to the inner upper surface, and a lower portion of the reinforcing member 220 may be fixed to the inner lower surface.

[0072] Furthermore, the reinforcing member 220 may have a bent shape B1. That is, the bent shape B1 may be a shape that is alternately bent in the front-rear direction. Such a bent shape B1 may increase the mechanical rigidity of the reinforcing member 220.

[0073] Therefore, according to this configuration of the present invention, the pack housing 210 further includes a reinforcing member 220 fixed to at least one of an inner lower surface, an inner upper surface, and an inner side surface, thereby effectively preventing deformation of the pack housing 210 due to vibration or external impact. That is, the reinforcing member 220 can prevent deformation of the pack housing 210 due to the load of the multiple battery cells 100. In particular, the reinforcing member 220 can effectively prevent deformation of the pack housing 210 in the vertical direction.

[0074] This not only reduces damage caused by frequent deformation of the pack housing 210, but also prevents damage to the multiple battery cells 100 housed inside the pack housing or to the internal structure caused by vibration or external impact.

[0075] Furthermore, the present invention makes it easy to realize a large-capacity battery pack 200 including a large number of secondary batteries because the central portion of the pack housing 210 is not mechanically weak. As a result, the energy density of the battery pack 200 can be increased, and the manufacturing cost can be reduced by reducing the number of parts.

[0076] 2 and 8, the reinforcing member 220 may include a main body portion 221 extending in one direction, and bent portions 223 provided at both ends of the main body portion 221. The bent portions 223 may be bent to face the inner side of the pack housing 210. For example, as shown in FIG. 8, the bent portion 223 provided at the left end of the main body portion 221 of the reinforcing member 220 may be bent forward. The bent portion 223 provided at the right end of the main body portion 221 may be bent backward. Such a reinforcing member 220 may suppress deformation of the pack housing 210.

[0077] 5 and 8, the reinforcing member 220 may have the bent portion 223 bonded to the inner side surface 214b of the pack housing 210 by the filler 240. Thus, the outer surface of the bent portion 223 and the inner side surface 214b of the pack housing 210 may be bonded to each other.

[0078] Therefore, according to this configuration of the present invention, reinforcing member 220 includes main body portion 221 and bent portions 223 that are bent from both ends of main body portion 221 so as to face the inner side surface of pack housing 210 and joined to the inner side surface of pack housing 210 by filler 240, thereby effectively increasing the contact area between reinforcing member 220 and inner side surface 214b of pack housing 210. This effectively increases the fixing force of reinforcing member 220. Therefore, the present invention can prevent deformation of pack housing 210 due to external impact with a stronger fixing force.

[0079] FIG. 9 is a partial perspective view illustrating a schematic reinforcing member of a battery pack according to another embodiment of the present invention.

[0080] 9, an accommodating groove G1 and a coupling hole G2 may be formed in a reinforcing member 220A of a battery pack 200 according to another embodiment. Specifically, the accommodating groove G1 may be formed by recessing a portion of the body part 221 inwardly so that the filler 240 is filled therein. For example, a plurality of accommodating grooves G1 may be formed at predetermined intervals on each of an upper portion and a lower portion of the body part 221.

[0081] Also, the coupling hole G2 may be formed on the outer surface of the bent portion 223. The coupling hole G2 may be formed by punching out a portion of the bent portion 223 to accommodate a portion of the filler 240. For example, as shown in FIG 9, two coupling holes G2 may be formed on the outer surface of the bent portion 223.

[0082] Therefore, according to this configuration of the present invention, the reinforcing member 220A has an accommodating groove G1, which is a portion of the main body 221 recessed inward so that the filler 240 can be filled therein, and a coupling hole G2, which is a portion of the bent portion 223 punched out so that the filler 240 can be accommodated therein, so that an appropriate amount of the filler 240 can be accommodated in the accommodating groove G1 and the coupling hole G2 of the reinforcing member 220A, and the coupling force with the inner upper surface and inner side surface of the pack housing 210 can be increased. This makes it possible to effectively increase the durability of the battery pack 200.

[0083] Furthermore, the bent portion 223 may be provided with a coupling hole H2 to be bolted to the side wall 214d of the pack housing. A bolt hole (not shown) communicating with the coupling hole H2 may be formed in the side wall 214d of the pack housing.

[0084] FIG. 10 is a perspective view illustrating a schematic configuration of a reinforcing member of a battery pack according to still another embodiment of the present invention.

[0085] 10, a reinforcing member 220B of a battery pack 200 according to another embodiment may include a pair of plates 225a, 225b extending in one direction and spaced apart from each other by a predetermined distance to form an internal space. A filler 240 may be filled between the pair of plates 225a, 225b. For example, as shown in FIG. 10, the reinforcing member 220B may include a pair of plates 225a, 225b extending in the left-right direction. The pair of plates 225a, 225b are spaced apart from each other by a predetermined distance, and a filler 240 may be filled into the space S1 between the plates 225a, 225b.

[0086] Therefore, according to this configuration of the present invention, since reinforcing member 220B has a pair of plates 225a, 225b, a sufficient amount of filler 240 can be filled between the pair of plates 225a, 225b, which not only increases the rigidity of reinforcing member 220B, but also further increases the bonding strength of the lower and upper surfaces of pack housing 210 due to reinforcing member 220B containing a sufficient amount of filler 240 therein.

[0087] Furthermore, an opening P1 configured to allow an internal space between the pair of plates 225a, 225b to communicate with the outside may be formed in each of the pair of plates 225a, 225b. The opening P1 may be formed so that the filler 240 can be filled into the space between the plurality of battery cells 100. That is, the opening P1 may be formed at a position corresponding to the space between the plurality of battery cells 100 in the front-rear direction. This allows a portion of the filler 240 filled between the pair of plates 225a, 225b to flow through the opening P1 into the space between the plurality of battery cells 100.

[0088] Therefore, according to this configuration of the present invention, the reinforcing member 220 includes a pair of plates 225a, 225b, and the space between the pair of plates is filled with the filler 240, so that an appropriate amount of the filler 240 can be injected into the inside of the reinforcing member 220B, and the bonding strength between the reinforcing member 220B and the inner surface of the pack housing 210 can be effectively increased. As a result, the reinforcing member 220B can be bonded to the inner surface of the pack housing 210 with a higher fixing strength, and therefore the durability of the battery pack can be effectively increased.

[0089] Meanwhile, the battery pack 200 according to an embodiment of the present invention may further include various devices (not shown) for controlling charging and discharging of the battery pack 200, such as a BMS (Battery Management System), a current sensor, a fuse, etc.

[0090] Meanwhile, an electronic device (not shown) according to an embodiment of the present invention includes at least one of the above-described battery packs 200. The electronic device may further include a device housing (not shown) having a storage space for storing the battery pack 200, and a display unit that allows a user to check the charging state of the battery pack 200.

[0091] In addition, the battery pack 200 according to an embodiment of the present invention may be included in a vehicle such as an electric vehicle or a hybrid vehicle. That is, the vehicle according to an embodiment of the present invention may be equipped with at least one battery pack 200 according to an embodiment of the present invention described above in the vehicle body.

[0092] In this specification, terms indicating directions such as up, down, left, right, front, and back are used, but it will be obvious to those skilled in the art that such terms are used merely for convenience of explanation and may vary depending on the position of the object of interest, the position of the observer, etc.

[0093] As described above, the present invention has been described using limited embodiments and drawings. However, the present invention is not limited thereto, and it goes without saying that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention belongs within the technical spirit of the present invention and the equivalent scope of the claims. [Explanation of symbols]

[0094] 100 Battery Cells 111 Electrode terminal, positive terminal 112 Electrode terminal, negative terminal 116 Battery Can 200 Battery Pack 210 Pack Housing 212 Upper Frame 214 Lower Frame 216 Top cover 220 Reinforcement members 221 Main body 223 Bend section 225 Plate 230 Adhesive 240 Filling material 250 Busbar 251 Body Plate 252 Conductive Wire 260 Cooling Frame

Claims

1. A plurality of battery cells arranged in at least one direction, the battery cells being vertically supported with a pair of electrode terminals located at the top; a pack housing having an accommodation space for accommodating the plurality of battery cells, the pack housing having a lower portion of each of the plurality of battery cells bonded to an inner surface thereof; Including the battery pack.

2. The battery pack according to claim 1 , wherein the pack housing includes a plurality of fixing protrusions containing an adhesive, the fixing protrusions receiving lower portions of the respective battery cells.

3. 3 . The battery pack according to claim 1 , wherein the inside of the pack housing is filled with a filler material so as to surround each side of the plurality of battery cells.

4. the pack housing includes a lower frame that accommodates the plurality of battery cells therein, and an upper frame that is coupled to the lower frame and is positioned above the plurality of battery cells, the battery pack further includes a plurality of bus bars mounted on the upper frame, the bus bars being configured to contact electrode terminals of the plurality of battery cells, respectively; 4. The battery pack of claim 1, wherein the busbar comprises a plurality of conductive wires.

5. The battery pack according to claim 4 , wherein the upper frame is provided with protrusions that protrude toward the electrode terminals so as to cover a portion of each of the electrode terminals of the plurality of battery cells.

6. The battery pack includes: The pack housing further includes a reinforcing member fixed to at least one of an inner lower surface, an inner upper surface, and an inner side surface, The reinforcing member is a body portion extending toward the inner side; a bent portion bent from each of both ends of the main body portion so as to face an inner side surface of the pack housing and joined to the inner side surface of the pack housing; The battery pack of claim 3 .

7. The reinforcing member is a receiving groove in which a portion of the body is recessed inward so that the filler can be filled therein; a coupling hole formed by punching out a portion of the folded portion to receive the filler; The battery pack of claim 6 .

8. The reinforcing member includes a pair of plates each extending in one direction and spaced apart from each other by a predetermined distance to form a spaced apart space, The pair of plates each have an opening configured to allow an internal space between the pair of plates to communicate with the outside, The battery pack according to claim 6 or 7, wherein an internal space between the pair of plates is filled with the filler material.

9. 9. An electronic device comprising at least one battery pack according to any one of claims 1 to 8.

10. A motor vehicle comprising at least one battery pack according to any one of claims 1 to 8.

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