Battery packs, electronic devices and automobiles containing them

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 including the same, and a vehicle, and more particularly, to a battery pack having a reduced number of components, increased energy density, and improved manufacturing efficiency.

[0002] This application claims priority based on Korean Patent Application No. 10-2020-0073140 filed on June 16, 2020, and all of the contents disclosed in the specification and drawings of the application are incorporated into this application.

Background Art

[0003] In recent years, the demand for portable electronic products such as notebook computers, video cameras, and mobile phones has rapidly increased, and as the development of electric vehicles, energy storage batteries, robots, satellites, etc. has become full-scale, research on high-performance secondary batteries that can be repeatedly charged and discharged has been actively conducted.

[0004] Currently, secondary batteries such as nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries are commercialized. Among them, lithium secondary batteries have attracted attention because they have almost no memory effect, can be freely charged and discharged, have a very low self-discharge rate, and have a high energy density compared to nickel-based secondary batteries.

[0005] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as the positive electrode active material and the negative electrode active material, respectively. In addition, such lithium secondary batteries 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 arranged with a separator interposed therebetween, and an exterior material, for example, a battery case, that seals and houses such an electrode assembly together with an electrolytic solution.

[0006] And the lithium secondary battery can be classified into a can-type secondary battery in which the electrode assembly is housed in a metal can and a pouch-type secondary battery in which the electrode assembly is housed in a pouch of an aluminum laminate sheet according to the shape of the exterior material.

[0007] In some cases, can-type rechargeable batteries are manufactured with a cylindrical metal can in which the electrode assembly is housed. Conventional battery modules may include a module case that houses multiple rechargeable batteries, and busbars configured to electrically connect multiple can-type rechargeable batteries.

[0008] Conventionally, battery packs were manufactured by first housing multiple secondary batteries inside a module case, then placing the module case containing the multiple secondary batteries into a pack housing, and finally joining the pack housing and the module case.

[0009] However, when a battery pack has both a module case and a pack housing, the energy density of the pack decreases, the manufacturing process becomes more complex, and manufacturing costs increase. [Overview of the project] [Problems that the invention aims to solve]

[0010] This invention was devised to solve the above-mentioned problems, and aims to provide a battery pack that reduces the number of parts and improves energy density and manufacturing efficiency.

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

[0012] To achieve the above objective, a battery pack according to one aspect of the present invention is: The electrode terminals are located at the top and are arranged vertically, and there are multiple battery cells arranged in at least one direction, A pack housing having a housing space for accommodating multiple battery cells, with the lower part of each of the multiple battery cells bonded to the inner surface, Includes.

[0013] Furthermore, the pack housing may comprise multiple fixing protrusions into which adhesive is contained, and into which the lower part of each of the multiple battery cells is inserted.

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

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

[0016] The battery pack further includes a plurality of busbars mounted on an upper frame, each configured to contact the electrode terminals of a plurality of battery cells, and the busbars may be provided with a plurality of conductive wires.

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

[0018] The battery pack may further include reinforcing members fixed to one or more of the inner bottom surface, inner top surface, and inner side surfaces of the pack housing.

[0019] Furthermore, the reinforcing member is The main body extends toward the inner side, The main body is bent at both ends so as to face the inner side of the pack housing, and the bent portion is joined to the inner side of the pack housing, It can be equipped with.

[0020] Furthermore, the reinforcing members are a receiving groove in which a part of the main body is recessed inward so that the filling material is filled therein, a coupling hole in which a part of the bent portion is punched out so that the filling material is received, and may include.

[0021] Furthermore, the reinforcing member includes a pair of plates that extend in one direction and are spaced apart from each other by a predetermined distance to form a separation space, the pair of plates are each provided with an opening configured to communicate the internal space between the pair of plates with the outside, the internal space between the pair of plates may be filled with a filling material.

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

[0023] Also, to achieve the above object, an automobile according to still another aspect of the present invention includes the battery pack described above.

Effects of the Invention

[0024] According to one aspect of the present invention, by including a pack housing that houses a plurality of battery cells and has the lower portions of the plurality of battery cells adhered to the inner surface, the lower portions of the plurality of battery cells can be directly fixed to the pack housing without a separate module case, so that the manufacturing process can be simplified, the number of parts can be reduced, the energy density can be increased, and the manufacturing cost can be further reduced.

[0025] Furthermore, according to one aspect of the present invention, by filling the inside of the pack housing with a filler material so as to surround the sides of each of the multiple battery cells, short circuits between the multiple battery cells can be prevented. Moreover, if one of the multiple battery cells ignites due to an external impact or malfunction during use of the battery pack, causing a rupture and flames to occur from the side of the battery case, it is possible to prevent the flames and high-temperature gases from being transmitted to the multiple battery cells adjacent to the ignited battery cell, thereby preventing thermal runaway and chain ignition. In other words, the filler material can play a role in blocking heat transfer between the multiple battery cells.

[0026] Furthermore, according to one aspect of the present invention, by further including a reinforcing member fixed to one or more of the inner lower surface, inner upper surface, and inner side surface of the pack housing, deformation of the pack housing due to vibration or external impact can be effectively prevented. In other words, the reinforcing member can prevent deformation of the pack housing due to the load of multiple battery cells. In particular, the reinforcing member can effectively prevent deformation of the pack housing that causes it to bend in the vertical direction.

[0027] The following drawings accompanying this specification illustrate preferred embodiments of the invention and, together with the detailed description of the invention, serve to further illustrate the technical idea of ​​the invention; therefore, the invention should not be construed as being limited solely to what is shown in the drawings. [Brief explanation of the drawing]

[0028] [Figure 1] This is a schematic perspective view of a battery pack according to one embodiment of the present invention. [Figure 2] This is an exploded perspective view illustrating the configuration of a battery pack according to one embodiment of the present invention. [Figure 3] This is a schematic plan view showing a partial configuration of a battery pack according to another embodiment of the present invention. [Figure 4] This is a schematic longitudinal cross-section along the line C-C' in Figure 3. [Figure 5]This is a schematic perspective view showing a partial configuration of a battery pack according to another embodiment of the present invention. [Figure 6] This is a partial plan view schematically showing a part of the configuration of a battery pack according to one embodiment of the present invention. [Figure 7] This is a partial plan view schematically showing a part of the configuration of a battery pack according to one embodiment of the present invention. [Figure 8] This is a schematic plan view showing a partial configuration of a battery pack according to another embodiment of the present invention. [Figure 9] This is a schematic partial perspective view showing a reinforcing member for a battery pack according to another embodiment of the present invention. [Figure 10] This is a schematic perspective view showing a reinforcing member for a battery pack according to yet another embodiment of the present invention. [Modes for carrying out the invention]

[0029] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted in a manner limited to their usual or dictionary meanings, but rather in a manner corresponding to the technical idea 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, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the present invention. It should be understood that there are various equivalents and modifications that can be substituted for these at the time of filing this application.

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

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

[0033] Here, the battery cell 100 may be in an upright configuration. Electrode terminals may be provided on the upper part 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 casing 116 and an electrode assembly (not shown) housed inside the battery casing 116. A negative electrode terminal 112 may be formed on the body of the battery casing 116, and a positive electrode terminal 111 may be formed on the battery cap attached to the top of the battery casing 116.

[0035] Furthermore, the multiple battery cells 100 can be arranged in at least one direction. The multiple battery cells 100 can be arranged spaced apart at predetermined intervals. For example, when viewed from direction F in Figure 1, the multiple battery cells 100 can be arranged in the front-to-back direction and the left-to-right direction.

[0036] On the other hand, in this specification, terms indicating directions such as front, back, left, right, up, and down may change depending on the observer's position and the form in which the object is placed. However, for the sake of explanation, in this specification, directions such as front, back, left, right, up, and down will be distinguished and indicated based on the perspective when viewed from direction F.

[0037] Furthermore, the multiple battery cells 100 may be arranged with, for example, a spacing of approximately 3 mm between them. Also, multiple battery cells 100 located in one row may be arranged so that their positions in the front-to-back direction are offset from each other. And multiple battery cells 100 located in one column may be arranged so that their positions in the left-to-right direction are offset from each other. In other words, the multiple battery cells 100 can be said to be arranged in a zigzag pattern in the front-to-back and left-to-right directions as a whole.

[0038] Furthermore, the pack housing 210 may have a housing space for accommodating multiple battery cells 100. Referring to Figure 2, the pack housing 210 may form an internal space capable of accommodating multiple battery cells 100.

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

[0040] Specifically, the adhesive 230 may be an adhesive that has been injected into the pack housing 210 and then solidified. The adhesive 230 may have electrical insulating properties. The adhesive 230 may be a glue or a hot-melt resin. For example, the adhesive 230 may contain 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 houses a plurality of battery cells 100 and to which the lower part of each of the plurality of battery cells 100 is bonded to the inner surface, the lower parts 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] Figure 3 is a schematic plan view showing a partial configuration of a battery pack according to another embodiment of the present invention, and Figure 4 is a schematic longitudinal cross-sectional view along the line C-C' in Figure 3.

[0043] Referring to Figures 3 and 4 in conjunction with Figure 2, the inner bottom surface of the pack housing 210 may be provided with a plurality of fixing protrusions P configured to allow the lower parts of a plurality of battery cells 100 to be inserted. The fixing protrusions P may have a form that protrudes (upward) from the inner surface of the pack housing 210 toward the battery cells 100 to guide the placement position of the plurality of battery cells 100.

[0044] In other words, the fixing projection P may be circular in shape on a plane so as to surround the outer circumference of the lower end of the battery cell 100. Furthermore, one battery cell 100 may be mounted inside the circular fixing projection P.

[0045] Furthermore, the fixing projection P may contain adhesive 230. The adhesive 230 may be configured to bond the lower part of each of the multiple battery cells 100 to the inner surface of the fixing projection P.

[0046] Therefore, with this configuration of the present invention, the presence of fixing protrusions P on the inner surface of the pack housing 210 not only makes it easier to position the multiple battery cells 100 in the correct position, but 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 fixing protrusions P can accommodate adhesive 230, allowing multiple battery cells 100 to be fixed using only a small amount of adhesive 230 without waste. This reduces the manufacturing cost of the battery pack 200.

[0048] Figure 5 is a schematic perspective view showing a partial configuration of a battery pack according to another embodiment of the present invention.

[0049] Referring to Figure 5 in conjunction with Figure 2, the pack housing 210 of the battery pack 200 of the present invention may further include a filler material 240 filled inside. The pack housing 210 may be filled with the filler material 240 so as not to cover the electrode terminals located on the top of the battery cell 100. That is, the filler material 240 may be filled inside the pack housing 210 so as to surround the horizontal sides of the battery cell 100.

[0050] Furthermore, the filler 240 may be a polymer resin configured to harden after being filled into the inside of the pack housing 210. For example, the filler 240 may be an epoxy resin.

[0051] Therefore, with this configuration of the present invention, by filling the pack housing 210 with the filler material 240 so as to surround the sides of the multiple battery cells 100, it is possible to prevent short circuits between the multiple battery cells 100. Furthermore, if one of the multiple battery cells 100 ignites due to an external impact or malfunction during use of the battery pack 200, causing a rupture and flames to occur from the side of the battery case, it is possible to prevent thermal runaway and chain ignition from occurring due to the transfer of flames and high-temperature gases to the multiple battery cells 100 adjacent to the ignited battery cell 100. In other words, the filler material 240 can play a role in blocking heat transfer between the multiple battery cells 100.

[0052] On the other hand, referring further to Figures 1 and 2, the pack housing 210 of the present invention may comprise a lower frame 214 and an upper frame 212. Specifically, the lower frame 214 may comprise a lower wall 214c on which a plurality of battery cells 100 are fixed, and a side wall 214d extending upward from the outer peripheral edge of the lower wall 214c, so as to form a housing space for housing a plurality of battery cells 100 inside. The height of the side wall 214d corresponds to the height of the battery cells 100.

[0053] 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 material 240, and the filler material 240 is interposed between the multiple battery cells 100 fixed on the lower frame 214. The filler material 240 is filled so as not to cover the positive terminal 111 and negative terminal 112 provided at the upper end of the battery cell 100.

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

[0055] Figure 6 is a schematic partial plan view showing a part of the configuration of a battery pack according to one embodiment of the present invention. In Figure 6, only the busbar 250 and the multiple battery cells 100 are shown to illustrate how the busbar 250 and the multiple battery cells 100 are electrically connected, and other components are not shown.

[0056] Referring to Figure 6 in conjunction with Figure 2, the battery pack 200 of the present invention may further include a plurality of busbars 250. The busbars 250 may be configured to electrically connect a plurality of battery cells 100 to each other. The busbars 250 may include a conductive metal. For example, the busbars 250 may include at least one of copper, nickel, and aluminum.

[0057] Furthermore, multiple busbars 250 may be mounted on the upper frame 212. The busbars 250 may be configured to contact the electrode terminals of multiple battery cells 100, respectively. For example, the busbar 250 may comprise a body plate 251 that extends along the multiple battery cells 100, and multiple conductive wires 252.

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

[0059] The main plate 251 and the conductive wire 252 can be connected to each other. The conductive wire 252 can contact the positive terminal 111 or negative terminal 112 formed on the top of the multiple battery cells 100 through the exposed portion T2 of the upper frame 212. The busbar 250 can electrically connect the multiple battery cells 100 to each other in series and / or parallel.

[0060] The battery cell 100 of the present invention has a structure in which a pair of electrode terminals 111 and 112 are provided in the same direction. Such a structure can simplify electrical connections. Furthermore, such a structure makes it possible to apply a structure in which the surface opposite to the surface on which the electrode terminals 111 and 112 are formed is directly coupled to the cooling frame 260. As described above, the positive electrode terminal 111 and 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, if the battery cell 100 is a cylindrical battery cell, the peripheral region of the upper end of the battery can 116 functions as the negative electrode terminal 112, and the battery cap covering the upper end opening of the battery can 116 functions as the positive electrode terminal 111. The peripheral region of the upper end of the battery can 116 may mean, for example, the upper surface of a crimping portion formed to cover the upper end opening of the battery can 116 and secure the battery cap that functions as the positive electrode terminal 111.

[0061] Therefore, with this configuration of the present invention, the busbar 250, by having multiple conductive wires 252, can make precise contact with the electrode terminals 111 and 112 provided on the top of multiple battery cells 100. In other words, the busbar 250 needs to be configured so that no short circuits occur between the multiple battery cells 100. However, if the distance between the positive electrode terminal 111 and the negative electrode terminal 112 of the multiple battery cells 100 is very close, precise connection work between the busbar 250 and the electrode terminals is required. According to the present invention, the busbar 250 can precisely connect the electrode terminals through the conductive wires, thereby reducing the occurrence of explosions and fires due to short circuits.

[0062] Furthermore, the battery pack of the present invention may further include an upper cover 216, as shown in Figures 1 and 2. The upper cover 216 can prevent other conductive conductors from coming into contact with the busbars 250 by covering the tops of the busbars 250. The upper cover 216 may be in the form of a horizontally extending plate.

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

[0064] Referring to Figure 7 in conjunction with Figures 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 a plurality of battery cells 100. That is, the protrusion K may protrude to cover a portion of the positive electrode terminal 111 and / or the negative electrode terminal 112. The protrusion K may have a form that protrudes toward the electrode terminals within the exposed portion T2.

[0065] For example, as shown in Figure 7, one of the multiple protrusions K may have a shape in which a portion of the negative electrode terminal 112 provided on the upper part of the battery cell 100 is exposed to the upper part. Another protrusion may have a shape in which a portion of the positive electrode terminal 111 provided on the upper part of the battery cell 100 is exposed to the upper part.

[0066] For example, among the multiple conductive wires 252 of the busbar 250, a portion of the upper frame 212 adjacent to the conductive wire 252 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 in order to reduce the possibility of the conductive wire 252 coming into contact with the negative terminal 112.

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

[0068] Therefore, with this configuration of the present invention, the upper frame 212 is provided with protrusions K that project toward the electrode terminals so as to cover a portion of the electrode terminals of the multiple battery cells 100, thereby effectively reducing the risk of short circuits between the battery cells 100 that may occur during the process of connecting the busbar 250 and the electrode terminals. This increases the manufacturing efficiency of the battery pack 200 and effectively reduces the occurrence of accidents during the manufacturing process.

[0069] Figure 8 is a schematic plan view showing a partial configuration of a battery pack according to another embodiment of the present invention.

[0070] Referring further to Figure 8 in conjunction with Figure 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. There may be various ways in which the reinforcing member 220 is fixed to the pack housing 210, such as welding or bonding. The reinforcing member 220 may be a metal with excellent mechanical rigidity. For example, the reinforcing member 220 may be stainless steel, steel, or an aluminum alloy.

[0071] In particular, the reinforcing member 220 can be fixed to one or more of the inner lower surface, inner upper surface, and inner side surfaces of the pack housing 210. For example, the reinforcing member 220 may be in a form that extends across the interior of the pack housing 210 in the left-right direction. The upper part of the reinforcing member 220 may be fixed to the inner upper surface, and the lower part 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 in which it is alternately bent in the front-rear direction. Such a bent shape B1 can increase the mechanical rigidity of the reinforcing member 220.

[0073] Therefore, according to this configuration of the present invention, by further including a reinforcing member 220 fixed to one or more of the inner lower surface, inner upper surface, and inner side surface of the pack housing 210, deformation of the pack housing 210 due to vibration or external impact can be effectively prevented. In other words, 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 that causes it to bend in the vertical direction.

[0074] This not only reduces damage to the pack housing 210 due to frequent deformation, but also prevents damage to the multiple battery cells 100 or internal components housed inside the pack housing due to vibration or external shock.

[0075] Furthermore, because the central part of the pack housing 210 is not mechanically weak, the present invention makes it easier to realize a high-capacity battery pack 200 equipped with a large number of secondary batteries. This increases the energy density of the battery pack 200 and reduces manufacturing costs by reducing the number of parts.

[0076] Referring further to Figures 2 and 8, the reinforcing member 220 may comprise a main body portion 221 extending in one direction, and bendable portions 223 provided at each end of the main body portion 221. The bendable portions 223 can be bent to face the inner side surface of the pack housing 210. For example, as shown in Figure 8, the bendable portion 223 at the left end of the main body portion 221 of the reinforcing member 220 can be bent forward. The bendable portion 223 at the right end of the main body portion 221 can be bent backward. Such a reinforcing member 220 can suppress deformation of the pack housing 210.

[0077] Furthermore, as shown in Figures 5 and 8, the reinforcing member 220 can be joined to the inner side surface of the pack housing 210 by the filler material 240 at the bent portion 223. This allows the outer surface of the bent portion 223 and the inner side surface 214b of the pack housing 210 to be joined to each other.

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

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

[0080] Referring to Figure 9, in another embodiment, the reinforcing member 220A of the battery pack 200 may have a housing groove G1 and a coupling hole G2 formed therein. Specifically, the housing groove G1 may be in the form of a part of the main body 221 being recessed inward so that the filler material 240 is filled inside. For example, multiple housing grooves G1 may be formed on the upper and lower parts of the main body 221, respectively, spaced apart from each other at predetermined intervals.

[0081] Furthermore, the bonding holes G2 may be formed on the outer surface of the bent portion 223. The bonding holes G2 may be formed by punching out a portion of the bent portion 223 so that a portion of the filler material 240 is accommodated. For example, as shown in Figure 9, two bonding holes G2 may be formed on the outer surface of the bent portion 223.

[0082] Therefore, with this configuration of the present invention, the reinforcing member 220A is provided with a housing groove G1 in which a portion of the main body 221 is recessed inward so that the filler material 240 can be filled inside, and a connecting hole G2 in which a portion of the bent portion 223 is punched out so that the filler material 240 can be accommodated in an appropriate amount of filler material 240 in the housing groove G1 and connecting hole G2 of the reinforcing member 220A, thereby increasing the bonding force with the inner upper surface and inner side surface of the pack housing 210. This effectively increases the durability of the battery pack 200.

[0083] Furthermore, the bent portion 223 may be provided with a connecting hole H2 that is bolted to the side wall 214d of the pack housing. The side wall 214d of the pack housing may have a bolt hole (not shown) that communicates with the connecting hole H2.

[0084] Figure 10 is a schematic perspective view showing a reinforcing member of a battery pack according to yet another embodiment of the present invention.

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

[0086] Therefore, with this configuration of the present invention, since the reinforcing member 220B comprises a pair of plates 225a and 225b, a sufficient amount of filler material 240 can be filled between the pair of plates 225a and 225b, further increasing the rigidity of the reinforcing member 220B. Moreover, the reinforcing member 220B, which contains a sufficient amount of filler material 240, can further increase the bonding force between the lower and upper surfaces of the pack housing 210.

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

[0088] Therefore, according to this configuration of the present invention, the reinforcing member 220 comprises a pair of plates 225a and 225b, and a filler material 240 is filled between the pair of plates. This allows an appropriate amount of filler material 240 to be injected into the interior of the reinforcing member 220B, effectively increasing the bonding force between the reinforcing member 220B and the inner surface of the pack housing 210. As a result, the reinforcing member 220B can bond to the inner surface of the pack housing 210 with a higher fixing force, effectively increasing the durability of the battery pack.

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

[0090] On the other hand, an electronic device (not shown) according to one 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) provided with a storage space for housing the battery pack 200, and a display unit on which the user can check the charging status of the battery pack 200.

[0091] Furthermore, the battery pack 200 according to one embodiment of the present invention may be included in automobiles such as electric vehicles and hybrid vehicles. That is, an automobile according to one embodiment of the present invention may be equipped with a battery pack 200 containing at least one of the battery packs 200 according to one embodiment of the present invention described above.

[0092] In this specification, terms indicating direction such as up, down, left, right, front, and back are used, but these terms are for the sake of convenience of explanation only, and it is obvious to those skilled in the art that the direction can change depending on the position of the object in question, the position of the observer, etc.

[0093] As described above, the present invention has been explained with limited embodiments and drawings, but it goes without saying that the present invention is not limited thereto, and that various modifications and variations are possible within the equivalent scope of the technical concept and claims of the present invention by persons with ordinary skill in the art to which the present invention belongs. [Explanation of Symbols]

[0094] 100 battery cells 111 Electrode terminal, positive terminal 112 Electrode terminal, negative terminal 116 Battery Can 200 Battery Packs 210 Pack Housing 212 Upper frame 214 Lower frame 216 Top cover 220 Reinforcement member 221 Main body 223 Bend section 225 Plate 230 Adhesives 240 Filling material 250 Bus Bar 251 Main plate 252 Conductive Wire 260 Cooling Frame

Claims

1. A pair of electrode terminals are located at the top and are positioned vertically, and a plurality of battery cells are arranged in at least one direction. A pack housing having a housing space for accommodating the plurality of battery cells, with the lower part of each of the plurality of battery cells bonded to the inner surface, In a battery pack including, The aforementioned battery pack is The pack housing further includes a plate-shaped reinforcing member fixed to one or more of the inner lower surface, inner upper surface, and inner side surfaces, The reinforcing member is A main body portion extending toward the inner side surface, having a form that is alternately folded in the front-rear direction, The main body portion is bent from both ends so as to face the inner side surface of the pack housing, and the bent portion is joined to the inner side surface of the pack housing, Equipped with, The inside of the pack housing is filled with a filler material so as to surround the sides of each of the multiple battery cells. The reinforcing member comprises a pair of plates, each extending in one direction and separated from each other by a predetermined distance to form a separation space. Each of the pair of plates is provided with an opening configured to allow communication between the internal space between the pair of plates and the outside. A battery pack in which the filler material is filled into the internal space between the pair of plates.

2. The battery pack according to claim 1, wherein the pack housing comprises a plurality of fixing protrusions containing adhesive, into which the lower part of each of the plurality of battery cells is inserted.

3. The pack housing comprises a lower frame that houses the plurality of battery cells inside, and an upper frame that is connected to the lower frame and located above the plurality of battery cells. The battery pack further includes a plurality of busbars mounted on the upper frame, each configured to contact the electrode terminals of the plurality of battery cells, The battery pack according to claim 1 or 2, wherein the busbar is provided with a plurality of conductive wires.

4. The battery pack according to claim 3, wherein the upper frame is provided with protrusions that extend toward the electrode terminals so as to cover a portion of each of the electrode terminals of the plurality of battery cells.

5. The reinforcing member is A receiving groove is provided in which a portion of the main body is recessed inward so that the filler material can be filled inside, A connecting hole is formed in which a portion of the bent portion is punched out so as to accommodate the filler, The battery pack according to claim 1, comprising:

6. An electronic device comprising at least one battery pack according to any one of claims 1 to 5.

7. An automobile comprising at least one battery pack according to any one of claims 1 to 5.

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