Battery pack

Abstract

A battery pack is disclosed. The battery pack according to an embodiment of the present invention may comprise: a base plate; side walls which are provided on the upper surface of the base plate and create an interior space; a first battery module which is provided in the interior space; and a partition wall which divides the interior space and has a first hole facing the first battery module and a first flow path communicating with the first hole.

Description

battery pack

[0001] The present invention relates to a battery pack.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0021753, filed on February 15, 2024, the entire disclosure of which is incorporated herein by reference.

[0003] As demand for portable electronic products such as laptops, video cameras, and mobile phones rapidly increases and the commercialization of robots and electric vehicles becomes more widespread, research into high-performance secondary batteries capable of repeated charging and discharging is actively underway.

[0004] Currently commercialized secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries are receiving attention for their advantages of being able to charge and discharge freely, having a very low self-discharge rate, and having a high energy density, as they have almost no memory effect compared to nickel-based secondary batteries.

[0005] These lithium secondary batteries primarily use lithium oxide and carbon materials as the positive and negative electrode active materials, respectively. Lithium secondary batteries comprise an electrode assembly comprising positive and negative plates coated with the positive and negative electrode active materials, respectively, with a separator interposed between them, and an outer case, i.e., a battery case, that seals and encloses the electrode assembly together with an electrolyte.

[0006] In general, lithium secondary batteries can be classified into can-type secondary batteries in which the electrode assembly is built into a metal can and pouch-type secondary batteries in which the electrode assembly is built into a pouch of an aluminum laminate sheet, depending on the shape of the outer packaging material.

[0007] Recently, secondary batteries have been widely used for power and energy storage, not only in small devices like portable electronic devices but also in medium- to large-sized devices like electric vehicles and energy storage systems (ESS). Multiple secondary batteries can be electrically connected and housed within a module case to form a single battery module. Furthermore, multiple such battery modules can be connected to form a single battery pack.

[0008] However, when multiple secondary batteries (battery cells) or battery modules are densely packed in a confined space, they can be vulnerable to thermal events. Specifically, if a thermal runaway event occurs in a single battery cell, high-temperature gases, flames, and heat can be generated. If these gases, flames, or heat are transferred to other battery cells within the same battery module, an explosive chain reaction, such as thermal propagation, can occur. This chain reaction can not only cause a fire or explosion in the battery module in question, but can also trigger fires or explosions in other battery modules.

[0009] Moreover, for medium- to large-sized battery packs, such as those used in electric vehicles, the risk of thermal chain reactions can be even greater due to the inclusion of a large number of battery cells and battery modules to increase output and / or capacity. Furthermore, battery packs installed in electric vehicles may be surrounded by users, such as drivers. Therefore, if a thermal event occurring in a specific battery cell or module is not properly controlled and a chain reaction occurs, it can result in significant property damage and even human casualties. Therefore, it is necessary to appropriately control thermal events occurring in battery cells or modules to improve the thermal safety of battery packs.

[0010] The present invention aims to solve the above-mentioned problems and other problems.

[0011] Another object of the present invention may be to provide a battery pack with improved safety when a thermal event occurs.

[0012] Another object of the present invention may be to provide a battery pack capable of suppressing heat propagation by providing independent venting paths for each battery module when a thermal event occurs.

[0013] Another object of the present invention may be to provide a battery pack that can suppress the emission of ignitable particles and flames and discharge venting gas at a lower temperature when a thermal event occurs.

[0014] Another object of the present invention may be to provide a battery pack that is easy to control venting when a thermal event occurs.

[0015] In order to achieve the above-described purpose, a battery pack according to an embodiment of the present invention may include: a base plate; a side wall installed on an upper surface of the base plate and forming an internal space; a first battery module installed in the internal space; and a partition wall that partitions the internal space and has a first hole facing the first battery module and a first flow path communicating with the first hole.

[0016] In addition, the battery pack may further include a second battery module installed in the internal space, and the partition wall may be positioned between the first battery module and the second battery module and may have a second hole facing the second battery module and a second path communicating with the second hole.

[0017] Additionally, the first euro and the second euro may extend along the length of the partition wall.

[0018] Additionally, the first euro can be formed on top of the second euro.

[0019] Additionally, the battery pack may further include a side wall installed on an upper surface of the base plate and having a third euro in communication with the first euro.

[0020] Additionally, the third euro may extend along the length of the side wall.

[0021] Additionally, the side wall may have a fourth euro connected to the second euro.

[0022] Additionally, the fourth euro may extend along the length of the side wall.

[0023] Additionally, the battery pack may further include a first fastening member penetrating the side wall and fastened to the partition wall.

[0024] Additionally, the battery pack may further include a first gasket disposed between the side wall and the partition wall.

[0025] Additionally, the battery pack may further include a rear wall installed on an upper surface of the base plate and forming an exterior of the battery pack, and having a fifth passage communicating with the side wall.

[0026] Additionally, the battery pack may further include a second fastening member penetrating the side wall and fastened to the rear wall.

[0027] Additionally, the battery pack may further include a second gasket disposed between the side wall and the rear wall.

[0028] Additionally, the battery pack may further include a pack cover covering the internal space and coupled with the partition wall.

[0029] Additionally, the battery pack may further include a third fastening member penetrating the pack cover and fastened to the partition wall.

[0030] A vehicle according to one aspect of the present invention comprises a battery pack of the present invention.

[0031] According to at least one of the embodiments of the present invention, the thermal safety of a battery pack can be improved.

[0032] According to at least one of the embodiments of the present invention, heat propagation can be suppressed.

[0033] According to at least one of the embodiments of the present invention, venting control of a battery pack can be facilitated.

[0034] 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.

[0035] FIG. 1 is a drawing showing a battery pack according to one embodiment of the present invention.

[0036] Fig. 2 is a diagram showing a partial configuration of the battery pack of Fig. 1 in isolation.

[0037] FIG. 3 is a drawing showing a part of the configuration of the battery pack of FIG. 1.

[0038] FIG. 4 is a drawing showing the first partition wall of the battery pack of FIG. 2.

[0039] FIGS. 5 and 6 are drawings showing the second partition wall of the battery pack of FIG. 2.

[0040] Fig. 7 is a drawing showing the rear wall of the battery pack of Fig. 2.

[0041] Fig. 8 is a drawing showing a side wall of the battery pack of Fig. 2.

[0042] Fig. 9 is a drawing showing a cross-sectional configuration along the cutting line H-H' of Fig. 8.

[0043] Fig. 10 is a drawing showing a cross-sectional configuration along the cutting line I-I' of Fig. 8.

[0044] Fig. 11 is a drawing showing a cross-sectional configuration along the cutting line J-J' of Fig. 8.

[0045] Fig. 12 is a drawing showing a cross-sectional configuration along the cutting line K-K' of Fig. 8.

[0046] Fig. 13 is a drawing showing a cross-sectional configuration along the cutting line L-L' of Fig. 8.

[0047] Fig. 14 is a drawing showing the combination of the first partition wall and the side wall of Fig. 2.

[0048] Fig. 15 is a drawing showing a cross-sectional configuration along the cutting line A-A' of Fig. 3.

[0049] Fig. 16 is a drawing showing the combination of the second partition wall and the side wall of Fig. 2.

[0050] Fig. 17 is a drawing showing a cross-sectional configuration along the cutting line B-B' of Fig. 3.

[0051] Fig. 18 is a drawing showing the combination of the rear wall and the side wall of Fig. 2.

[0052] Fig. 19 is a drawing showing a cross-sectional configuration along the cutting line C-C' of Fig. 3.

[0053] Figure 20 is a drawing showing a cross-sectional configuration along the cutting line D-D' of Figure 1D.

[0054] Fig. 21 is a drawing showing a cross-sectional configuration along the cutting line E-E' of Fig. 1.

[0055] Fig. 22 is a drawing showing a cross-sectional configuration along the cutting line F-F' of Fig. 3.

[0056] Figure 23 is an enlarged view of part M of Figure 22.

[0057] Figure 24 is an enlarged view of part N of Figure 22.

[0058] Figure 25 is an enlarged view of part O of Figure 22.

[0059] Fig. 26 is a drawing showing a cross-sectional configuration along the cutting line G-G' of Fig. 3.

[0060] Figure 27 is an enlarged view of part P of Figure 26.

[0061] Figure 28 is an enlarged view of part Q of Figure 26.

[0062] Figure 29 is an enlarged view of part R of Figure 26.

[0063] Fig. 30 is a drawing showing a part of the configuration of the battery pack of Fig. 1.

[0064] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0065] Accordingly, 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 ideas of the present invention, and it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0066] FIG. 1 is a drawing showing a battery pack according to one embodiment of the present invention. FIG. 2 is a drawing showing a partial configuration of the battery pack of FIG. 1 in isolation. FIG. 3 is a drawing showing a partial configuration of the battery pack of FIG. 1. FIG. 4 is a drawing showing a first partition wall (171) of the battery pack of FIG. 2. FIGS. 5 and 6 are drawings showing a second partition wall (172) of the battery pack of FIG. 2.

[0067] Referring to FIGS. 1 to 6, a battery pack according to one embodiment of the present invention may include a base plate (110), a side wall (140), a battery module (200), and a partition wall (171, 172).

[0068] The base plate (110) may have a flat shape. Additionally, the base plate (110) may have a square shape.

[0069] A side wall (140) may be installed on the upper surface of the base plate (110). The side wall (140) may also be referred to as a side beam (140). The side wall (140) may form the exterior of the battery pack. The side walls (140) may be provided in pairs. The side walls (140) may extend long along the front-rear direction or the X-axis direction. The side wall (140) and the base plate (110) may form an internal space.

[0070] The front wall (120) may be installed on the upper surface of the base plate (110). The front wall (120) may also be referred to as a front beam (120). The front wall (120) may form the exterior of the battery pack. The front wall (120) may extend lengthwise in the left-right direction or along the Y-axis direction. The front wall (120) and the base plate (110) may form an internal space.

[0071] The rear wall (130) may be installed on the upper surface of the base plate (110). The rear wall (130) may also be referred to as a rear beam (130). The rear wall (130) may form the exterior of the battery pack. The rear wall (130) may extend lengthwise in the left-right direction or along the Y-axis direction. The rear wall (130) and the base plate (110) may form an internal space.

[0072] The battery module (200) may be installed in the internal space. The battery module (200) may include a module case (210, see FIG. 20). In addition, the battery module (200) may include a plurality of battery cells (220) accommodated inside the module case (210). In this case, the battery cells (220, see FIG. 20) may refer to secondary batteries. In addition, the battery cells (220) may be secondary batteries having a pouch shape. The battery modules (200) may be provided in multiple numbers. The term "battery module (200)" may be used as a general term for the first battery module (201), the second battery module (202), the third battery module (203), and the fourth battery module (204).

[0073] The center beam (160) can partition the internal space. The center beam (160) can be extended in the front-rear direction or along the X-axis direction. The center beam (160) can be installed on the base plate (110).

[0074] Partition walls (171, 172) can divide the internal space. There may be multiple partition walls (171, 172). The partition walls (171, 172) may extend in the left-right direction or the Y-axis direction. A plurality of partition walls (171, 172) may be arranged along the front-back direction or the X-axis direction. The partition walls (171, 172) may be installed on the base plate (110).

[0075] The first partition wall (171) may include a first inlet hole (171a), a first flow path (171b), and a first discharge hole (171c). The first inlet hole (171a) may be formed on the rear surface of the first partition wall (171). The first discharge hole (171c) may be formed on the left side of the first partition wall (171). The first flow path (171b) may connect the first inlet hole (171a) and the first discharge hole (171c). The first flow path (171b) may be formed on the inside of the first partition wall (171) and may extend along the left-right direction or the Y-axis direction. The first inlet hole (171a), the first flow path (171b), and the first discharge hole (171c) may be positioned lower than the middle of the Z-axis height of the first partition wall (171).

[0076] The second partition wall (172) may include a second inlet hole (172a), a second flow path (172b), and a second discharge hole (172c). The second inlet hole (172a) may be formed on the front side of the second partition wall (172). The second discharge hole (172c) may be formed on the left side of the second partition wall (172). The second flow path (172b) may connect the second inlet hole (172a) and the second discharge hole (172c). The second flow path (172b) may be formed on the inside of the second partition wall (172) and may extend in the left-right direction or the Y-axis direction.

[0077] Additionally, the second partition wall (172) may include a third inlet hole (172d), a third flow path (172e), and a third discharge hole (172f). The third inlet hole (172d) may be formed on the rear surface of the second partition wall (172). The third discharge hole (172f) may be formed on the left side of the second partition wall (172). The third flow path (172e) may connect the third inlet hole (172d) and the third discharge hole (172f). The third flow path (172e) may be formed on the inside of the second partition wall (172) and may extend in the left-right direction or the Y-axis direction.

[0078] The second inlet hole (172a) may be located above the third inlet hole (172d). The second flow path (172b) may be located above the third flow path (172e). The second discharge hole (172c) may be located above the third discharge hole (172f).

[0079] The battery modules (200) may be positioned in the order of a first battery module (201), a second battery module (202), a third battery module (203), and a fourth battery module (204) in the front-rear direction. The first battery module (201) may be surrounded by a side wall (140), a first partition wall (171), a center beam (160), and a second partition wall (172). The second battery module (202) may be surrounded by a side wall (140), a pair of second partition walls (172), and a center beam (160). The third battery module (203) may be surrounded by a side wall (140), a pair of second partition walls (172), and a center beam (160). The fourth battery module (204) may be surrounded by a side wall (140), a second partition wall (172), a center beam (160), and a rear wall (130).

[0080] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. When a thermal event occurs, venting gas (g) and ignitable particles can be discharged to the outside of the battery module (200). At this time, the venting gas (g) and ignitable particles can be introduced into the inlet holes (171a, 172a, 172d) of the partition walls (171, 172) and can move through the flow paths (171b, 172b, 172e). As a result, the venting path can be lengthened, the temperature of the venting gas (g) can be lowered, and the discharge of ignitable particles to the outside of the battery pack can be suppressed.

[0081] Referring to FIGS. 1 to 6, the second partition wall (172) may be positioned between the first battery module (201) and the second battery module (202). The second inlet hole (172a) of the second partition wall (172) may face the first battery module (201). And the third inlet hole (172d) of the second partition wall (172) may face the second battery module (202).

[0082] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The second partition wall (172) can include a second flow path (172b) communicating with the first battery module (201) and a third flow path (172e) communicating with the second battery module (202). In addition, the venting path of the first battery module (201) and the venting path of the second battery module (202) can be formed independently. As a result, heat propagation between the first battery module (201) and the second battery module (202) can be suppressed.

[0083] FIG. 7 is a drawing showing the rear wall (130) of the battery pack of FIG. 2. Referring to FIG. 7, the rear wall (130) according to an embodiment of the present invention may include a fourth inlet hole (130a), a fourth flow path (130b), and a fourth discharge hole (130c). The fourth inlet hole (130a) may be formed on the front side of the rear wall (130). The fourth discharge hole (130c) may be formed on the left side of the rear wall (130). The fourth flow path (130b) may connect the fourth inlet hole (130a) and the fourth discharge hole (130c). The fourth flow path (130b) may be formed inside the rear wall (130) and may extend in the left-right direction or the Y-axis direction. The fourth inlet hole (130a), the fourth flow path (130b), and the fourth discharge hole (130c) may be positioned higher than the middle of the Z-axis height of the rear wall (130).

[0084] Fig. 8 is a drawing showing a side wall (140) of the battery pack of Fig. 2. Fig. 9 is a drawing showing a cross-sectional configuration along the cutting line H-H' of Fig. 8. Fig. 10 is a drawing showing a cross-sectional configuration along the cutting line I-I' of Fig. 8.

[0085] Referring to FIGS. 8 to 10, a side wall (140) of a battery pack according to an embodiment of the present invention may be elongated along the front-rear direction or the X-axis direction. The side wall (140) may include a lower flow path (141) and an upper flow path (142). The lower flow path (141) and the upper flow path (142) may be formed inside the side wall (140). The lower flow path (141) and the upper flow path (142) may be elongated along the front-rear direction or the X-axis direction. The cross sections of the upper flow path (142) and the lower flow path (141) may have a rectangular shape. The upper flow path (142) may be located above the lower flow path (141). The upper flow path (142) and the lower flow path (141) may be configured independently. Alternatively, the upper flow path (142) and the lower flow path (141) may be separated or partitioned. Additionally, the upper passage (142) and the lower passage (141) may be formed to penetrate the side wall (140). Additionally, a venting device may be provided at one end of the upper passage (142) and the lower passage (141).

[0086] Fig. 11 is a drawing showing a cross-sectional configuration taken along the cutting line J-J' of Fig. 8. Referring to Figs. 8 and 11, a side wall (140) of a battery pack according to an embodiment of the present invention may include a first hole (140a). The first hole (140a) may be formed on the right side of the side wall (140). The first hole (140a) may be in communication with a lower flow path (141).

[0087] Fig. 12 is a drawing showing a cross-sectional configuration taken along the cutting line K-K' of Fig. 8. Referring to Figs. 8 and 12, the side wall (140) of the battery pack according to an embodiment of the present invention may include a second hole (140b). The second hole (140b) may be formed on the right side of the side wall (140). The second holes (140b) may be formed in a pair. In addition, the pair of second holes (140b) may be connected to the lower channel (141) and the upper channel (142), respectively.

[0088] Fig. 13 is a drawing showing a cross-sectional configuration taken along the cutting line L-L' of Fig. 8. Referring to Figs. 8 and 13, the side wall (140) of the battery pack according to one embodiment of the present invention may include a third hole (140c). The third hole (140c) may be formed on the right side of the side wall (140). The third hole (140c) may be in communication with the upper flow path (142).

[0089] Fig. 14 is a drawing showing the combination of the first partition wall (171) and the side wall (140) of Fig. 2. Fig. 15 is a drawing showing a cross-sectional configuration taken along the cutting line A-A' of Fig. 3. Referring to Figs. 14 and 15, the first partition wall (171) of the battery pack according to an embodiment of the present invention may be combined with the side wall (140). The left side of the first partition wall (171) may be combined with the right side of the side wall (140). In addition, a first gasket (181) may be arranged between the left side of the first partition wall (171) and the right side of the side wall (140). The first gasket (181) may seal a space between the first partition wall (171) and the side wall (140). The first gasket (181) may include a fourth hole (181a). The first discharge hole (171c), the fourth hole (181a), and the first hole (140a) can be connected. In addition, the first flow path (171b) and the lower flow path (141) can be connected. The first fastening member (191) can fasten and fix the first partition wall (171), the first gasket (181), and the side wall (140). The first fastening member (191) can penetrate the side wall (140) and the first gasket (181), and at least a portion of the first fastening member (191) can be inserted into the first partition wall (171).

[0090] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. When a thermal event occurs, venting gas (g) and ignitable particles can be discharged to the outside of the battery module (200). At this time, the venting gas (g) can be discharged to the outside of the battery pack through the first passage (171b) of the first partition wall (171) and the lower passage (141) of the side wall (140). As a result, the venting path can be lengthened, so that the temperature of the venting gas (g) can be lowered, and the discharge of ignitable particles to the outside of the battery pack can be suppressed.

[0091] Fig. 16 is a drawing showing the combination of the second partition wall (172) and the side wall (140) of Fig. 2. Fig. 17 is a drawing showing a cross-sectional configuration taken along the cutting line B-B' of Fig. 3. Referring to Figs. 16 and 17, the second partition wall (172) of the battery pack according to an embodiment of the present invention can be combined with the side wall (140). The left side of the second partition wall (172) can be combined with the right side of the side wall (140). In addition, a second gasket (182) can be placed between the left side of the second partition wall (172) and the right side of the side wall (140). The second gasket (182) can seal the space between the second partition wall (172) and the side wall (140). The second gasket (182) can include a fifth hole (182a). The fifth hole (182a) may be formed as a pair. The pair of fifth holes (182a) may be arranged in the vertical direction.

[0092] The third discharge hole (172f), the lower fifth hole (182a), and the lower second hole (140b) may be connected. In addition, the second flow path (172b) and the upper flow path (142) may be connected. In addition, the second discharge hole (172c), the upper fifth hole (182a), and the upper second hole (140b) may be connected. In addition, the third flow path (172e) and the lower flow path (141) may be connected.

[0093] The second fastening member (192) can fasten and secure the second partition wall (172), the second gasket (182), and the side wall (140). The second fastening member (192) can penetrate the side wall (140) and the second gasket (182), and at least a portion of the second fastening member (192) can be inserted into the second partition wall (172).

[0094] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. When a thermal event occurs, venting gas (g) and ignitable particles can be discharged to the outside of the battery module (200). At this time, the venting gas (g) can be discharged to the outside of the battery pack through the second passage (172b) of the second partition wall (172) and the upper passage (142) of the side wall (140). In addition, the venting gas (g) can be discharged to the outside of the battery pack through the third passage (172e) of the second partition wall (172) and the lower passage (141) of the side wall (140). As a result, the venting path can be lengthened, so that the temperature of the venting gas (g) can be lowered, and the discharge of ignitable particles to the outside of the battery pack can be suppressed.

[0095] Fig. 18 is a drawing showing the combination of the rear wall (130) and the side wall (140) of Fig. 2. Fig. 19 is a drawing showing a cross-sectional configuration taken along the cutting line C-C' of Fig. 3. Referring to Figs. 18 and 19, the rear wall (130) of the battery pack according to one embodiment of the present invention can be combined with the side wall (140).

[0096] The rear wall (130) may include a fourth inlet hole (130a), a fourth flow path (130b), and a fourth discharge hole (130c). The fourth inlet hole (130a) may be formed on the front surface of the rear wall (130). The fourth discharge hole (130c) may be formed on the left side of the rear wall (130). The fourth flow path (130b) may connect the fourth inlet hole (130a) and the fourth discharge hole (130c). The fourth flow path (130b) may be formed inside the rear wall (130) and may extend in the left-right direction or the Y-axis direction. The fourth inlet hole (130a), the fourth flow path (130b), and the fourth discharge hole (130c) may be positioned higher than the middle of the Z-axis height of the rear wall (130).

[0097] The left side of the rear wall (130) can be joined to the right side of the side wall (140). A third gasket (183) can be placed between the left side of the rear wall (130) and the right side of the side wall (140). The third gasket (183) can seal between the rear wall (130) and the side wall (140). The third gasket (183) can include a sixth hole (183a). The fourth discharge hole (130c), the sixth hole (183a), and the third hole (140c) can be connected. In addition, the fourth flow path (130b) and the upper flow path (142) can be connected. The third fastening member (193) can fasten and fix the rear wall (130), the third gasket (183), and the side wall (140). The third fastening member (193) can penetrate the side wall (140) and the third gasket (183), and at least a portion of it can be inserted into the rear wall (130).

[0098] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. When a thermal event occurs, venting gas (g) and ignitable particles can be discharged to the outside of the battery module (200). At this time, the venting gas (g) can be discharged to the outside of the battery pack through the fourth passage (130b) of the rear wall (130) and the upper passage (142) of the side wall (140). As a result, the venting path can be lengthened, so that the temperature of the venting gas (g) can be lowered, and the discharge of ignitable particles to the outside of the battery pack can be suppressed.

[0099] FIG. 20 is a drawing showing a cross-sectional configuration taken along the cutting line D-D' of FIG. 1. Referring to FIG. 20, a battery pack according to an embodiment of the present invention may further include a pack cover (150). The pack cover (150) may have a square plate shape. The pack cover (150) may cover an internal space formed by the base plate (110), the side wall (140), the front wall (120), and the rear wall (130). In addition, the pack cover (150) may be combined with the first partition wall (171), the second partition wall (172), the side wall (140), the center beam (160), the rear wall (130), and the front wall (120).

[0100] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The pack cover (150), the first partition wall (171), the second partition wall (172), the side wall (140), the center beam (160), the rear wall (130), and the front wall (120) can surround each battery module (200). As a result, the venting gas (g) can be discharged to the outside through the partition walls (171, 172) and the side wall (140) without being transmitted to the adjacent battery module (200).

[0101] Referring to FIG. 20, a battery pack according to an embodiment of the present invention may include a fourth fastening member (194). The fourth fastening member (194) may fasten the base plate (110) and the partition walls (171, 172). The fourth fastening member (194) may penetrate the base plate (110) and at least a portion thereof may be inserted into the partition walls (171, 172).

[0102] Additionally, the battery pack according to one embodiment of the present invention may include a fifth fastening member (195). The fifth fastening member (195) may fasten the pack cover (150) and the partition wall (171, 172). The fifth fastening member (195) may penetrate the pack cover (150) and at least a portion thereof may be inserted into the partition wall (171, 172).

[0103] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The fourth fastening member (194) and the fifth fastening member (195) can guide the venting gas (g) generated from the battery module (200) to flow into the partition wall (171, 172) by strengthening the bonding force between the partition wall (171, 172), the base plate (110), and the pack cover (150). In addition, the fourth fastening member (194) and the fifth fastening member (195) can prevent the venting gas (g) from moving to the adjacent battery module (200) by strengthening the bonding force between the partition wall (171, 172), the base plate (110), and the pack cover (150).

[0104] FIG. 21 is a drawing showing a cross-sectional configuration taken along the line E-E' of FIG. 1. Referring to FIG. 21, a battery pack according to an embodiment of the present invention may include a sixth fastening member (196). The sixth fastening member (196) may fasten the base plate (110) and the side wall (140). In addition, the sixth fastening member (196) may fasten the base plate (110) and the center beam (160). The sixth fastening member (196) may penetrate the base plate (110), and at least a portion of the sixth fastening member (196) may be inserted into the side wall (140) or the center beam (160).

[0105] In addition, the battery pack according to one embodiment of the present invention may include a seventh fastening member (197). The seventh fastening member (197) may fasten the pack cover (150) and the side wall (140). In addition, the seventh fastening member (197) may fasten the pack cover (150) and the center beam (160). The seventh fastening member (197) may penetrate the pack cover (150), and at least a portion of the seventh fastening member (197) may be inserted into the side wall (140) or the center beam (160).

[0106] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The sixth fastening member (196) and the seventh fastening member (197) can guide the venting gas (g) generated from the battery module (200) to flow into the partition walls (171, 172) by strengthening the bonding force between the side wall (140), the center beam (160), and the pack cover (150). In addition, the sixth fastening member (196) and the seventh fastening member (197) can prevent the venting gas (g) from moving to the adjacent battery module (200) by strengthening the bonding force between the side wall (140), the center beam (160), and the pack cover (150).

[0107] Fig. 22 is a cross-sectional view taken along the line F-F' of Fig. 3. Fig. 23 is an enlarged view of part M of Fig. 22. Referring to Figs. 22 and 23, the venting gas (g) generated from the first battery module (201) of the battery pack according to an embodiment of the present invention can be discharged through the first inlet hole (171a), the first flow path (171b), the first discharge hole (171c) of the first partition wall (171), and the lower flow path (141) of the side wall (140).

[0108] Fig. 24 is an enlarged view of part N of Fig. 22. Referring to Figs. 22 to 24, the venting gas (g) generated from the second battery module (202) of the battery pack according to one embodiment of the present invention can be discharged through the second inlet hole (172a), the second flow path (172b), the second discharge hole (172c) of the second partition wall (172), and the lower flow path (141) of the side wall (140).

[0109] In addition, the venting gas (g) generated from the third battery module (203) of the battery pack according to one embodiment of the present invention can be discharged through the third inlet hole (172d), the third flow path (172e), the third discharge hole (172f) of the second partition wall (172) and the lower flow path (141) of the side wall (140).

[0110] Fig. 25 is an enlarged view of part O of Fig. 22. Referring to Figs. 22 and 25, the venting gas (g) generated from the fourth battery module (204) of the battery pack according to one embodiment of the present invention can be discharged through the second inlet hole (172a), the second flow path (172b), the second discharge hole (172c) of the second partition wall (172), and the lower flow path (141) of the side wall (140).

[0111] Fig. 26 is a cross-sectional view taken along the line G-G' of Fig. 3. Fig. 27 is an enlarged view of part P of Fig. 26. Referring to Figs. 26 and 27, the venting gas (g) generated from the first battery module (201) of the battery pack according to an embodiment of the present invention can be discharged through the second inlet hole (172a), the second flow path (172b), the second discharge hole (172c) of the second partition wall (172), and the upper flow path (142) of the side wall (140).

[0112] Fig. 28 is an enlarged view of part Q of Fig. 26. Referring to Figs. 26 to 28, the venting gas (g) generated from the second battery module (202) of the battery pack according to one embodiment of the present invention can be discharged through the second inlet hole (172a), the second flow path (172b), the second discharge hole (172c) of the second partition wall (172), and the upper flow path (142) of the side wall (140).

[0113] Fig. 29 is an enlarged view of part R of Fig. 26. Referring to Figs. 26 and 29, the venting gas (g) generated from the fourth battery module (204) of the battery pack according to one embodiment of the present invention can be discharged through the fourth inlet hole (130a), the fourth flow path (130b), the fourth discharge hole (130c) of the rear wall (130), and the upper flow path (142) of the side wall (140).

[0114] In addition, the venting gas (g) generated from the third battery module (203) of the battery pack according to one embodiment of the present invention can be discharged through the second inlet hole (172a), the second flow path (172b), the second discharge hole (172c) of the second partition wall (172) and the upper flow path (142) of the side wall (140).

[0115] FIG. 30 is a drawing showing a portion of the battery pack of FIG. 1. FIG. 30 is a drawing showing the remaining configuration, omitting the pack cover (150). Referring to FIG. 30, the venting gas (g) generated from each battery module (200) may move toward the side wall (140). Alternatively, the venting gas (g) generated from each battery module (200) may move away from the center beam (160). This minimizes heat transfer to adjacent battery modules (200). In addition, since an independent venting path is provided for each battery module (200), heat transfer can be minimized. In addition, since the venting path is extended long, flames or ignitable particles can be suppressed from being discharged to the outside of the battery pack. In addition, since the venting path is extended long, the temperature of the venting gas (g) can be lowered and discharged to the outside of the battery pack.

[0116] In addition, the battery pack according to the present invention may further include various components, for example, components of a battery pack known at the time of filing of the present invention, such as a BMS, a bus bar, a relay, a current sensor, etc.

[0117] A vehicle according to the present invention may include the battery pack according to the present invention described above. The battery pack according to the present invention may be applied to vehicles such as electric vehicles or hybrid vehicles. Furthermore, in addition to the battery pack, the vehicle according to the present invention may further include various other components included in the vehicle, such as a body, a motor, and control devices such as an electronic control unit (ECU).

[0118] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back are used in this specification, it is obvious to those skilled in the art that these terms are only for convenience of explanation and may vary depending on the location of the target object or the location of the observer.

[0119] As described above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited thereto, and various modifications and variations are possible by a person having ordinary skill in the art to which the present invention pertains within the scope of the technical idea of ​​the present invention and the equivalent scope of the patent claims to be described below.

Claims

1. Base plate; A side wall installed on the upper surface of the base plate and forming an internal space; A first battery module installed in the above internal space; and, A battery pack comprising a partition wall that divides the internal space and has a first hole facing the first battery module and a first passage communicating with the first hole.

2. In paragraph 1, Further comprising a second battery module installed in the above internal space, The above partition wall is, Located between the first battery module and the second battery module, A battery pack having a second hole facing the second battery module and a second path communicating with the second hole.

3. In paragraph 2, The above first euro and the above second euro, A battery pack extending along the length of the above partition wall.

4. In paragraph 2, The above first euro is, A battery pack formed on top of the second euro.

5. In paragraph 2, A battery pack further comprising a side wall installed on the upper surface of the base plate and having a third euro in communication with the first euro.

6. In paragraph 5, The above third euro is a battery pack extending along the length of the side wall.

7. In paragraph 5, The above side wall is, A battery pack having a fourth euro connected to the second euro.

8. In paragraph 7, The above fourth euro is a battery pack extending along the length of the side wall.

9. In paragraph 5, A battery pack further comprising a first fastening member penetrating the side wall and fastened to the partition wall.

10. In paragraph 5, A battery pack further comprising a first gasket disposed between the side wall and the partition wall.

11. In paragraph 5, A battery pack further comprising a rear wall installed on the upper surface of the base plate and forming the exterior of the battery pack, and having a fifth passage communicating with the side wall.

12. In paragraph 11, A battery pack further comprising a second fastening member penetrating the side wall and fastened to the rear wall.

13. In paragraph 11, A battery pack further comprising a second gasket disposed between the side wall and the rear wall.

14. In paragraph 1, A battery pack further comprising a pack cover covering the inner space and coupled to the partition wall.

15. In paragraph 14, A battery pack further comprising a third fastening member penetrating the pack cover and fastened to the partition wall.

16. A vehicle comprising a battery pack according to any one of claims 1 to 15.

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