Battery pack

Abstract

A battery pack is disclosed. The battery pack according to an embodiment of the present invention may comprise: a base plate; a lower battery module located on the upper surface of the base plate; an inner cover covering the upper surface of the lower battery module and including a top part having a flow path therein; and an upper battery module installed on the upper surface of the inner cover.

Description

battery pack

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

[0002] This application claims priority to Korean Patent Application No. 10-2024-0030734, filed March 4, 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 to adjacent battery modules when a thermal event occurs.

[0013] Another object of the present invention may be to provide a battery pack with improved cooling efficiency.

[0014] In order to achieve the above-described purpose, a battery pack according to one embodiment of the present invention may include: a base plate; a lower battery module positioned on an upper surface of the base plate; an inner cover including a top part that covers an upper surface of the lower battery module and has a flow path therein; and an upper battery module installed on an upper surface of the inner cover.

[0015] Additionally, the inner cover may further include a side part that covers one side of the lower battery module and has a passage that communicates with the top part.

[0016] Additionally, the side part can be installed on the base plate.

[0017] Additionally, the base plate may have a euro inside.

[0018] Additionally, the euro of the base plate and the euro of the inner cover can be connected.

[0019] Additionally, the battery pack may further include a first fastening member that connects the inner cover and the upper battery module.

[0020] Additionally, the battery pack may further include a first flame retardant member disposed between the lower battery module and the inner cover.

[0021] Additionally, the battery pack may further include a second flame-retardant member disposed between the inner cover and the upper battery module.

[0022] Additionally, the battery pack may further include a third flame-retardant member disposed inside the top part.

[0023] Additionally, the battery pack may further include a side wall installed on the upper surface of the base plate and covering the inner cover and the upper battery module.

[0024] Additionally, the battery pack may further include a pack cover covering the upper surface of the upper battery module.

[0025] In addition, the lower battery module may include: a module case providing a space therein and having a venting hole formed on an upper surface; and a plurality of battery cells arranged inside the module case.

[0026] Additionally, the battery pack may further include a fourth flame-retardant member disposed between the side part and the lower battery module.

[0027] Additionally, the battery pack may further include a fifth flame-retardant member disposed inside the side part.

[0028] Additionally, the battery pack may further include a second fastening member that connects the inner cover and the base plate.

[0029] A vehicle according to one aspect of the present invention comprises a battery pack of the present invention.

[0030] According to at least one of the embodiments of the present invention, the thermal safety of a battery pack can be improved.

[0031] According to at least one of the embodiments of the present invention, heat propagation can be suppressed.

[0032] According to at least one of the embodiments of the present invention, the cooling efficiency of a battery pack can be improved.

[0033] The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

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

[0035] Figure 2 is a diagram showing a partial configuration of the battery pack of Figure 1.

[0036] Figure 3 is a drawing showing the battery module of Figure 2.

[0037] Figure 4 is a diagram showing a partial configuration of the battery module of Figure 3.

[0038] FIG. 5 is a diagram illustrating a partial configuration of a battery pack according to an embodiment of the present invention.

[0039] FIG. 1 is a drawing showing a battery pack according to one embodiment of the present invention.

[0040] Figure 2 is a diagram showing a partial configuration of the battery pack of Figure 1.

[0041] Figure 3 is a drawing showing the battery module of Figure 2.

[0042] Figure 4 is a diagram showing a partial configuration of the battery module of Figure 3.

[0043] FIG. 5 is a diagram illustrating a partial configuration of a battery pack according to an embodiment of the present invention.

[0044] Figure 6 is a drawing showing the configuration of Figure 5 combined.

[0045] Fig. 7 is a drawing showing a cross-sectional configuration along the cutting line A-A' of Fig. 6.

[0046] Fig. 8 is a drawing showing a cross-sectional configuration along the cutting line B-B' of Fig. 6.

[0047] Fig. 9 is a drawing showing a modified embodiment of Fig. 8.

[0048] Figure 10 is an enlarged view of part F of Figure 9.

[0049] Fig. 11 is a drawing showing a modified embodiment of Fig. 9.

[0050] Figure 12 is an enlarged view of part G of Figure 11.

[0051] Figure 13 is an enlarged view of part H of Figure 11.

[0052] FIG. 14 is a diagram illustrating a partial configuration of a battery pack according to another embodiment of the present invention.

[0053] Figure 15 is a drawing showing the configuration of Figure 14 combined.

[0054] Fig. 16 is a drawing showing a cross-sectional configuration along the cutting line C-C' of Fig. 15.

[0055] FIG. 17 is an exploded view of a portion of a battery pack according to another embodiment of the present invention.

[0056] Figure 18 is a drawing showing the configuration of Figure 17 combined.

[0057] Fig. 19 is a drawing showing a cross-sectional configuration along the cutting line D-D' of Fig. 17.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Referring to FIGS. 1 and 2, a battery pack according to one embodiment of the present invention may include a base plate (110) and a battery module (200).

[0062] The base plate (110) may have a square plate shape.

[0063] The battery module (200) can be installed, fixed, coupled, attached or fastened to the upper surface of the base plate (110). The battery modules (200) can be stacked in the vertical direction or along the Z-axis direction. In addition, the battery modules (200) can be stacked in the left-right direction or along the Y-axis direction. In addition, the battery modules (200) can be stacked in the front-back direction or along the X-axis direction.

[0064] A plurality of battery modules (200) may be provided. The plurality of battery modules (200) may be composed of a lower battery module (201) and an upper battery module (202). The upper battery module (202) may be positioned above the lower battery module (201). The lower battery module (201) may be installed, fixed, coupled, attached, or fastened to the upper surface of the base plate (110). The structure and configuration of the lower battery module (201) and the upper battery module (202) may be identical. The lower battery module (201) and the upper battery module (202) may be collectively referred to as a battery module (200).

[0065] Fig. 3 is a drawing showing the battery module (200) of Fig. 2. Fig. 4 is a drawing showing a partial configuration of the battery module (200) of Fig. 3.

[0066] Referring to FIGS. 3 and 4, a battery module (200) of a battery pack according to an embodiment of the present invention may include a module case (210), a plurality of battery cells (220), a busbar frame assembly (250), an end cover (230), and a compression pad (240).

[0067] The module case (210) may have a rectangular parallelepiped shape. The module case (210) may also be referred to as a frame (210). The module case (210) may provide a space therein. The module case (210) may have an upper surface, a lower surface, and a pair of side surfaces. In addition, the module case (210) may have an open front and a back surface. The module case (210) may have a venting hole (211) on the upper surface. The venting hole (211) may connect the inside and the outside of the module case (210).

[0068] A plurality of battery cells (220) may be stacked in the left-right direction or the Y-axis direction. At this time, the battery cell (220) may mean a secondary battery. The secondary battery may include an electrode assembly, an electrolyte, an electrode lead, and a battery case. In particular, the battery cell (220) may be a pouch-type secondary battery. Each battery cell (220) may extend in the front-back direction or along the X-axis direction. The electrode lead may protrude to the front and rear of each battery cell (220).

[0069] A compression pad (240) may be placed between a plurality of battery cells (220). The compression pad (240) may be placed between at least some of the battery cells (220) and / or on the periphery of the laminate.

[0070] The compression pad (240) may be formed of an elastic material to enable swelling absorption of the battery cell (220). For example, the compression pad (240) may be formed of a foam material such as polyurethane. Alternatively, the compression pad (240) may be formed of a material capable of blocking heat or flames. For example, the compression pad (240) may be formed of an insulating or fire-retardant material such as silicone or mica.

[0071] A busbar frame assembly (250) may be provided at the front and rear of each of the plurality of battery cells (220). The busbar frame assembly (250) may be electrically connected to the electrode leads of the plurality of battery cells (220).

[0072] A pair of end covers (230) can be respectively coupled to the front and rear of the module case (210). The pair of end covers (230) can cover the front and rear of the module case (210). The end covers (230) can have a square shape.

[0073] FIG. 5 is a diagram illustrating a partial configuration of a battery pack according to an embodiment of the present invention. FIG. 6 is a diagram illustrating the configuration of FIG. 5 when combined. FIG. 7 is a diagram illustrating a cross-sectional configuration taken along the cutting line A-A' of FIG. 6. FIG. 8 is a diagram illustrating a cross-sectional configuration taken along the cutting line B-B' of FIG.

[0074] Referring to FIGS. 1 to 8, a battery pack according to an embodiment of the present invention may include an inner cover (400). The inner cover (400) may cover the upper surface of the lower battery module (201). In addition, a plurality of inner covers (400) may be provided. The inner covers (400) may be provided to correspond one-to-one with the lower battery module (201). The inner covers (400) may extend along the longitudinal direction of the battery module (200), the X-axis direction, or the front-back direction.

[0075] The inner cover (400) may include a top part (410). The top part (410) may have a square plate shape. The top part (410) may have a flow path (411) therein. The flow path (411) of the top part (410) may be referred to as a top flow path (411). The top part (410) may cover the upper surface of the lower battery module (201).

[0076] The upper battery module (202) may be positioned above the top part (410). In addition, the upper battery module (202) may be installed, fixed, coupled, attached or fastened to the upper surface of the top part (410).

[0077] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The inner cover (400) can block or reduce the transfer of thermal energy to the upper battery module (202) due to venting gas (g) or the like when a thermal event occurs from the lower battery module (201). In addition, the top part (410) can delay the accumulation of thermal energy by having a flow path therein. As a result, thermal runaway or thermal propagation can be suppressed or blocked.

[0078] Additionally, the inner cover (400) can block or reduce the transfer of thermal energy from the upper battery module (202) to the lower battery module (201) when a thermal event occurs.

[0079] Referring to FIGS. 1 to 8, an inner cover (400) of a battery pack according to an embodiment of the present invention may include side parts (420, 430). The side parts (420, 430) may cover the side surfaces of the lower battery module (201). The side parts (420, 430) may extend in the vertical direction or the Z-axis direction. In addition, the side parts (420, 430) may be connected, fastened, coupled, or attached to the top part (410). In addition, the side parts (420, 430) may be provided as a pair. The first side part (420) and the second side part (430) may be collectively referred to as a side part (420, 430) or a pair of side parts (420, 430). The pair of side parts (420, 430) may be arranged to face each other. A pair of side parts (420, 430) can each cover different sides of the battery module (200). The pair of side parts (420, 430) and the top part (410) can also be formed integrally.

[0080] Additionally, a pair of side parts (420, 430) may have a flow path (421, 431) therein. The flow paths (421, 431) of a pair of side parts (420, 430) may be referred to as side flow paths (421, 431).

[0081] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The inner cover (400) can block or reduce the transfer of thermal energy to the adjacent lower battery module (201) when a thermal event occurs from the lower battery module (201). In addition, the side parts (420, 430) can delay the accumulation of thermal energy by having side channels (421, 431) therein. As a result, thermal runaway or thermal propagation can be suppressed or blocked.

[0082] Referring to FIGS. 1 to 8, the side part (420, 430) of the battery pack according to one embodiment of the present invention can be installed, fixed, coupled, attached or fastened to the upper surface of the base plate (110).

[0083] According to this configuration of the present invention, the inner cover (400) is stably installed, thereby improving the thermal safety of the battery pack.

[0084] In addition, according to this configuration of the present invention, the rigidity of the base plate (110) or the battery pack can be improved.

[0085] Referring to FIGS. 1 to 8, a battery pack according to an embodiment of the present invention may include a first fastening member (161). The first fastening member (161) may connect the inner cover (400) and the upper battery module (202). The first fastening member (161) may connect the top part (410) and the upper battery module (202). The first fastening member (161) may penetrate the top part (410).

[0086] According to this configuration of the present invention, the inner cover (400) is stably installed, thereby improving the thermal safety of the battery pack.

[0087] In addition, according to this configuration of the present invention, the rigidity of the base plate (110) or the battery pack can be improved.

[0088] Referring to FIGS. 1 to 8, a battery pack according to an embodiment of the present invention may include a second fastening member (162). The second fastening member (162) may connect the inner cover (400) and the base plate (110). The second fastening member (162) may connect the side parts (420, 430) and the base plate (110). The second fastening member (162) may penetrate the base plate (110).

[0089] According to this configuration of the present invention, the inner cover (400) is stably installed, thereby improving the thermal safety of the battery pack.

[0090] In addition, according to this configuration of the present invention, the rigidity of the base plate (110) or the battery pack can be improved.

[0091] Referring to FIGS. 1 to 8, a battery pack according to an embodiment of the present invention may include a third fastening member (163). The third fastening member (163) may connect the lower battery module (201) and the base plate (110). The third fastening member (163) may penetrate the base plate (110).

[0092] Referring to FIGS. 1 to 8, a battery pack according to an embodiment of the present invention may have a flow path formed therein in the base plate (110). The flow path (111) of the base plate (110) may be referred to as a base flow path (111). In this case, the base plate (110) may also be referred to as a heat sink (110). The base flow path (111) may be communicated with the flow path of the inner cover (400). The base flow path (111) may be communicated with the side flow paths (421, 431). In addition, the base flow path (111) may be communicated with the top flow path (411).

[0093] Cooling air or cooling liquid may flow through the base passage (111), side passages (421, 431), and top passage (411). For example, a portion of the cooling fluid flowing along the base passage (111) may branch off and flow into the first side passage (421). The cooling fluid flowing into the first side passage (421) may flow through the top passage (411) and the second side passage (431) and then merge into the base passage (111).

[0094] According to this configuration of the present invention, the cooling efficiency of the battery pack can be improved.

[0095] Furthermore, with this configuration of the present invention, thermal safety can be improved. When a thermal event occurs from the lower battery module (201), the inner cover (400) can block or reduce the transfer of thermal energy to the adjacent battery module (200) by allowing the cooling fluid to flow along the base passage (111), side passages (421, 431), and top passage (411). As a result, thermal runaway or thermal propagation can be suppressed or blocked.

[0096] Referring to FIGS. 1 to 8, a battery pack according to an embodiment of the present invention may include a side wall (120). The side wall (120) may form the exterior of the battery pack. The side wall (120) may be installed, fixed, coupled, attached, or fastened to the upper surface of the base plate (110). The battery pack may include four side walls (120). The side walls (120) and the base plate (110) may form an internal space. The side wall (120) may cover at least one of the inner cover (400), the lower battery module (201), and the upper battery module (202).

[0097] Referring to FIGS. 1 to 8, a battery pack according to an embodiment of the present invention may include a pack cover (150). The pack cover (150) may form the exterior of the battery pack. The pack cover (150) may be installed, fixed, coupled, attached, or fastened to the side wall (120). The pack cover (150) may cover an internal space. The pack cover (150) may cover at least one of the inner cover (400), the lower battery module (201), and the upper battery module (202).

[0098] Below, the differences from the previously described embodiment will be explained, and overlapping explanations will be omitted.

[0099] FIG. 9 is a drawing showing a modified embodiment of FIG. 8. FIG. 10 is an enlarged drawing of part F of FIG. 9. Referring to FIGS. 9 and 10, the top part (410) of the inner cover (400) of the battery pack according to an embodiment of the present invention may include a third flame-retardant member (503). The third flame-retardant member (503) may include a flame-retardant material. In addition, the third flame-retardant member (503) may include an insulating material. In addition, the third flame-retardant member (503) may include a heat-resistant material. In addition, the third flame-retardant member (503) may include a fire-resistant material. For example, the third flame-retardant member (503) may include aerogel, mica, silicone, etc.

[0100] The third flame-retardant member (503) may be disposed inside the top part (410). In addition, the third flame-retardant member (503) may be disposed in the top passage (411). Even if the third flame-retardant member (503) is disposed in the top passage (411), the top passage (411) may be connected to the first side passage (421) and the second side passage (431). The third flame-retardant member (503) may have a pad shape. In addition, the third flame-retardant member (503) may extend in the front-back direction or the left-right direction along the top part (410).

[0101] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. When a thermal event occurs from the lower battery module (201), the inner cover (400) may be damaged. The third flame-retardant member (503) can block or reduce the transfer of thermal energy to the adjacent upper battery module (202) even if the inner cover (400) is damaged. As a result, thermal runaway or thermal propagation can be suppressed or blocked.

[0102] FIG. 11 is a drawing showing a modified embodiment of FIG. 9. FIG. 12 is an enlarged view of part G of FIG. 11. FIG. 13 is an enlarged view of part H of FIG. 11. Referring to FIGS. 11 to 13, the side parts (420, 430) of the inner cover (400) of the battery pack according to one embodiment of the present invention may include a fifth flame-retardant member (505). The fifth flame-retardant member (505) may be arranged inside the side parts (420, 430). The fifth flame-retardant members (505) may be provided as a pair. In addition, the fifth flame-retardant member (505) may be arranged in the side passages (421, 431). Even if the fifth flame-retardant member (505) is arranged in the side passages (421, 431), the side passages (421, 431) may be connected to the top passage (411). The fifth flame-retardant member (505) may have a pad shape. In addition, the third flame-retardant member (503) may extend in the front-back direction or the up-down direction along the side parts (420, 430).

[0103] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. When a thermal event occurs from the lower battery module (201), the inner cover (400) may be damaged. The fifth flame-retardant member (505) can block or reduce the transfer of thermal energy to the adjacent lower battery module (201) or upper battery module (202) even if the inner cover (400) is damaged. As a result, thermal runaway or thermal propagation can be suppressed or blocked.

[0104] Fig. 14 is an exploded view of a portion of a battery pack according to another embodiment of the present invention. Fig. 15 is a view showing the combined configuration of Fig. 14. Fig. 16 is a cross-sectional view taken along the section line C-C' of Fig. 15.

[0105] Referring to FIGS. 14 to 16, a battery pack according to an embodiment of the present invention may include a first flame-retardant member (501). The first flame-retardant member (501) may be disposed between the lower battery module (201) and the inner cover (400). In addition, the first flame-retardant member (501) may be disposed between the upper surface of the lower battery module (201) and the top part (410). In addition, the first flame-retardant member (501) may be coupled, attached, fixed, or fastened to the lower surface of the top part (410). In addition, the first flame-retardant member (501) may extend in the front-back direction or the left-right direction along the top part (410).

[0106] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The first flame-retardant member (501) can prevent damage to the inner cover (400) when a thermal event occurs from the lower battery module (201). In addition, even if the inner cover (400) is damaged, the first flame-retardant member (501) can block or reduce the transfer of thermal energy to the adjacent upper battery module (202). As a result, thermal runaway or thermal propagation can be suppressed or blocked.

[0107] Referring to FIGS. 14 to 16, a battery pack according to an embodiment of the present invention may include a second flame-retardant member (502). The second flame-retardant member (502) may be disposed between the upper battery module (202) and the inner cover (400). In addition, the second flame-retardant member (502) may be disposed between the lower surface of the upper battery module (202) and the top part (410). In addition, the second flame-retardant member (502) may be coupled, attached, fixed, or fastened to the upper surface of the top part (410) or the lower surface of the upper battery module (202). In addition, the second flame-retardant member (502) may extend in the front-back direction or the left-right direction along the top part (410).

[0108] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. When a thermal event occurs from the lower battery module (201), the inner cover (400) may be damaged. The second flame-retardant member (502) can block or reduce the transfer of thermal energy to the adjacent upper battery module (202) even if the inner cover (400) is damaged. As a result, thermal runaway or thermal propagation can be suppressed or blocked.

[0109] Fig. 17 is an exploded view of a portion of a battery pack according to another embodiment of the present invention. Fig. 18 is a drawing showing the combined configuration of Fig. 17. Fig. 19 is a cross-sectional view taken along the section line D-D' of Fig. 17.

[0110] Referring to FIGS. 17 to 19, a battery pack according to an embodiment of the present invention may include a fourth flame-retardant member (504). The fourth flame-retardant member (504) may be disposed between the lower battery module (201) and the inner cover (400). In addition, the fourth flame-retardant member (504) may be disposed between the lower battery module (201) and the side parts (420, 430). The fourth flame-retardant members (504) may be provided as a pair. In addition, the fourth flame-retardant member (504) may be coupled, attached, fixed, or fastened to the inner surface of the side parts (420, 430). In addition, the fourth flame-retardant member (504) may extend in the front-back direction or the up-down direction along the side parts (420, 430). The lower battery module (201) may be positioned between the pair of fourth flame-retardant members (504).

[0111] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The fourth flame-retardant member (504) can prevent damage to the inner cover (400) when a thermal event occurs from the lower battery module (201). In addition, even if the inner cover (400) is damaged, the fourth flame-retardant member (504) can block or reduce the transfer of thermal energy to the adjacent lower battery module (201) or upper battery module (202). As a result, thermal runaway or heat propagation can be suppressed or blocked.

[0112] 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.

[0113] 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).

[0114] 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.

[0115] As described above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the patent claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

Claims

1. Base plate; A lower battery module located on the upper surface of the base plate; An inner cover including a top part that covers the upper surface of the lower battery module and has a euro inside; and A battery pack including an upper battery module installed on the upper surface of the inner cover.

2. In paragraph 1, The above inner cover, A battery pack further comprising a side part covering one side of the lower battery module and having a passage communicating with the top part.

3. In paragraph 2, The above side part is, A battery pack installed on the above base plate.

4. In paragraph 1, The above base plate, A battery pack that has a euro inside.

5. In paragraph 4, A battery pack in which the euro of the above base plate and the euro of the above inner cover are connected.

6. In paragraph 1, A battery pack further comprising a first fastening member that connects the inner cover and the upper battery module.

7. In paragraph 1, A battery pack further comprising a first flame retardant member disposed between the lower battery module and the inner cover.

8. In paragraph 1, A battery pack further comprising a second flame-retardant member disposed between the inner cover and the upper battery module.

9. In paragraph 1, A battery pack further comprising a third flame-retardant member disposed inside the top part.

10. In paragraph 1, A battery pack further comprising a side wall installed on the upper surface of the base plate and covering the inner cover and the upper battery module.

11. In paragraph 1, A battery pack further comprising a pack cover covering the upper surface of the upper battery module.

12. In paragraph 1, The above lower battery module: A module case that provides space inside and has venting holes formed on the upper surface; and A battery pack comprising a plurality of battery cells arranged inside the above module case.

13. In paragraph 2, A battery pack further comprising a fourth flame-retardant member disposed between the side part and the lower battery module.

14. In paragraph 2, A battery pack further comprising a fifth flame retardant member disposed inside the side part.

15. In paragraph 1, A battery pack further comprising a second fastening member that connects the inner cover and the base plate.

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

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