Battery pack and device including the same

Abstract

The present invention relates to a battery pack and a device including the same. A battery pack according to an embodiment of the present invention can include a plurality of battery modules, a flow path frame disposed along at least a part of the periphery of the plurality of battery modules to form an internal passage, and a blower member communicating with one end of the internal passage of the flow path frame to control the gas discharge rate in the internal passage.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0087178 filed on July 14, 2022, and all the contents disclosed in the document of the Korean patent application are incorporated herein by reference in their entirety.

[0002] The present invention relates to a battery pack and a device including the same, and more particularly, to a battery pack capable of smoothly discharging high-temperature gas and a device including the same.

Background Art

[0003] Recently, with the rapid increase in the demand for portable electronic products such as notebook computers, video cameras, and mobile phones, and the full-scale development of electric vehicles, energy storage batteries, robots, satellites, etc., various studies have been conducted on secondary batteries used as their drive power sources.

[0004] As the need for the structure of large-capacity secondary batteries increases, the need for a battery pack with a multi-module structure in which a number of battery modules connected with each other are assembled is increasing.

[0005] When a battery cell included in a battery pack catches fire, high-temperature gas and flames may be generated. If the high-temperature gas and flames are not smoothly discharged, the internal pressure of the battery pack may increase and the pack structure may collapse.

Summary of the Invention

Problems to be Solved by the Invention

[0006] An embodiment of the present invention aims to provide a battery pack capable of smoothly discharging gas generated inside and a device including the same.

[0007] The technical problem of the present invention is not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description.

Means for Solving the Problem

[0008] A battery pack according to an embodiment of the present invention can include a plurality of battery modules, a flow path frame disposed along at least a part of the periphery of the plurality of battery modules to form an internal passage, and a blower member communicating with one end of the internal passage of the flow path frame to control the gas discharge speed in the internal passage.

[0009] According to one embodiment, the battery pack can further include an outlet communicating with the other end of the internal passage.

[0010] According to one embodiment, the battery pack further includes a pack housing that houses the battery module and the flow path frame, a storage tank disposed in at least one of the inside and outside of the pack housing, and a fluid supply pipe disposed between the storage tank and the flow path frame. The fluid stored in the storage tank can be supplied to the internal passage of the flow path frame through the fluid supply pipe.

[0011] According to one embodiment, the fluid can be at least one of a liquid containing water and a gas containing nitrogen.

[0012] According to one embodiment, the blower member operates when the pressure in the internal passage is a first pressure, and the storage tank can operate when the pressure in the internal passage is the first pressure or a second pressure higher than the first pressure after the operation of the blower member.

[0013] According to one embodiment, the storage tank can discharge the fluid at a third pressure higher than the second pressure.

[0014] According to one embodiment, the fluid supply pipe can be formed by branching from the fluid frame.

[0015] According to one embodiment, a plurality of storage tanks are provided, and any one of the plurality of storage tanks stores gas for discharging foreign matter injected into the internal passage, and any one of the remaining plurality of storage tanks can store liquid for discharging foreign matter injected into the internal passage.

[0016] According to one embodiment, the flow path frame can include a first flow path frame arranged along one side periphery of the plurality of battery modules and a second flow path frame arranged along the other side periphery of the plurality of battery modules.

[0017] According to one embodiment, the air blowing member can include a rotating fan.

[0018] A device according to an embodiment of the present invention can include the above-described battery pack.

Advantages of the Invention

[0019] According to an embodiment of the present invention, gas generated inside the battery pack can be smoothly discharged through an air blowing member arranged inside the battery pack, and generation of flames and pressure increase inside the battery pack can be suppressed.

[0020] According to an embodiment of the present invention, foreign matter accumulated inside the battery pack can be discharged to the outside through fluid injected into the battery pack, and the pressure inside the battery pack can be managed at a predetermined level.

[0021] According to an embodiment of the present invention, when an abnormal phenomenon occurs in the battery cell, the stability of the battery pack can be improved through at least one of an air blowing member arranged inside the battery pack and fluid injected into the battery pack.

[0022] In addition, various effects that can be directly or indirectly grasped from this document can be provided.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4a

Figure 4b

Figure 5

Figure 6a

Figure 6b

Modes for Carrying Out the Invention

[0024] Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement it. However, the present invention can be realized in various different forms and is not limited or restricted by the following embodiments.

[0025] To clearly explain the present invention, detailed descriptions of parts not related to the explanation or known technologies related that may obscure the gist of the present invention are omitted. When assigning reference numerals to the components of each drawing in this specification, the same or similar reference numerals are assigned to the same or similar components throughout the specification.

[0026] Also, the terms and words used in this specification and the claims should not be construed as being limited to their ordinary or dictionary meanings. The inventors should interpret them in accordance with the meaning and concept that conforms to the technical idea of the present invention in accordance with the principle that they can appropriately define the concept of the terms in order to explain their invention in the best way.

[0027] First Embodiment FIG. 1 is an exploded perspective view showing a battery pack according to the first embodiment of the present invention, and FIG. 2 is an exploded perspective view showing in detail the battery module illustrated in FIG. 1.

[0028] Referring to FIG. 1, a battery pack 101 according to the first embodiment of the present invention can include a pack housing 400, a plurality of battery modules 100 housed in the pack housing 400, and a flow path frame 300.

[0029] Each of the plurality of battery modules 100 can include a battery cell stack 102 in which a plurality of battery cells 103 are stacked, a module frame 110 that houses the battery cell stack 102, and an end plate 120, as illustrated in FIG. 2.

[0030] The plurality of battery cells 103 are stacked so as to be electrically connected to each other to form a battery cell stack 102. For example, the plurality of battery cells 103 can be stacked along a direction parallel to the y-axis, as illustrated in FIG. 2.

[0031] The module frame 110 that houses the battery cell stack 102 can include an upper plate 112 and a lower frame 111. The lower frame 111 can be a U-shaped frame. The U-shaped lower frame 111 can include a bottom and two side faces extending in the z-axis direction from both end portions of the bottom. The bottom can cover the lower surface (opposite direction of the z-axis) of the battery cell stack 102, and the side faces can cover both side surfaces (y-axis direction and the opposite direction) of the battery cell stack 102.

[0032] The upper plate 112 can be formed into a single plate-like structure that wraps the upper surface (z-axis direction) other than the lower surface and both side surfaces wrapped by the lower frame 111. The upper plate 112 and the lower frame 111 can be joined by welding or the like in a state where corresponding corner portions are in contact with each other, thereby forming a structure that covers the battery cell stack 102 vertically and horizontally. The battery cell stack 102 can be physically protected by the upper plate 112 and the lower frame 111. The upper plate 112 and the lower frame 111 can include a metal material having a predetermined strength.

[0033] The end plate 120 can cover the battery cell stack 102 exposed at both end portions of the module frame 110. A venting gate 121 can be formed in at least one of the both side end plates 120. The venting gate 121 can communicate with the inside of the battery module 100 and release the flame or heat that can be generated inside the battery module 100. The venting gate 121 is connected to an opening (not shown) formed in a part of the end plate 120 and can communicate with the inside of the battery module 100. The venting gate 121 can be arranged to face the outside of the battery pack 101.

[0034] A plurality of battery modules 100 can be arranged in a row or in a matrix form. For example, some of the plurality of battery modules 100 arranged in a matrix form can be arranged in a first row parallel to the y-axis direction, and the remaining part of the plurality of battery modules 100 can be arranged in a second row parallel to the first row. The plurality of battery modules 100 arranged in the first row and the plurality of battery modules 100 arranged in the second row can be arranged symmetrically with respect to the y-axis direction. Each bending gate 121 of the plurality of battery modules 100 arranged in the first row can be arranged to face the opposite direction of the x-axis direction. Each bending gate 121 of the plurality of battery modules 100 arranged in the second row can be arranged to face the x-axis direction.

[0035] The flow path frame 300 can be formed along at least a part of the periphery of the plurality of battery modules 100. The flow path frame 300 can be formed along at least one of the plurality of sides of the lower housing 410. The flow path frame 300 can be formed in a tubular shape between the lower housing 410 and the battery module 100. At least one flow path frame 300 can be provided between the lower housing 410 and the battery module 100. For example, when the plurality of battery modules 100 arranged in a matrix form are arranged in two rows, the flow path frame 300 can include a first flow path frame 310 and a second flow path frame 320 arranged in parallel. The first flow path frame 310 can be formed in a form extending along the end plate 120 of the plurality of battery modules 100 arranged in the first row. The second flow path frame 320 can be formed in a form extending along the end plate 120 of the plurality of battery modules 100 arranged in the second row. The internal passage of the first flow path frame 310 and the internal passage of the second flow path frame 320 can be formed to communicate with each other or can be formed separately and spaced apart from each other.

[0036] The pack housing 400 can include a lower housing 410 and an upper cover 420.

[0037] Since the upper cover 420 is coupled to the lower housing 410 so as to cover the upper part of the battery module 100, the entire length inside the pack housing 400 can be protected.

[0038] The lower housing 410 can include a bottom surface and side walls extending in the z-axis direction from the edge of the bottom surface. The pack tray 200 can be placed on the bottom surface. Inside the lower housing 410, the battery module 100, the flow path frame 300, the air blowing member 500, and the pack tray 200 can be accommodated. On the pack tray 200, a plurality of battery modules 100, the flow path frame 300, and the air blowing member 500 can be arranged. The plurality of battery modules 100 and the flow path frame 300 can be fixed to the pack tray 200 as needed.

[0039] The air blowing member 500 can discharge air into the internal passage of the flow path frame 300 through the discharge port 430. The air blowing member 500 can be a blower fan (or a rotary fan) having a plurality of blades installed to rotate about an axis, or an air blowing member without blades.

[0040] The air blowing member 500 can operate when at least any one of the flow velocity, the gas amount, and the pressure of the gas inside the flow path frame 300 reaches a predetermined level (reference value). Due to the operation (or rotation) of the air blowing member 500, the gas inside the flow path frame 300 is discharged to the outside at a speed higher than the performance of the venting member, so that the rise in the temperature and pressure inside the battery pack 101 can be suppressed. The venting member can include at least any one of a venting gate 121, a discharge port 430, a venting valve, and a rupture plate.

[0041] On one side wall of the lower housing 410, an exhaust port 430 capable of discharging heat or flames generated inside to the outside can be arranged. At least one of a venting valve and a rupture disc included in the venting member can be arranged around the exhaust port 430. The rupture disc can be connected to the flow path frame 300. The rupture disc can be formed to rupture when the pressure of the gas flowing into the internal passage of the flow path frame 300 reaches a predetermined pressure or more.

[0042] Inside the pack housing 400 including the lower housing 410 and the upper cover 420, various control and protection systems such as a battery management system (BMS) and a cooling system can be mounted together with the battery module 100. The battery management system can monitor at least one of the pressure, temperature, and gas of at least one of the battery module 100 and the flow path frame 300. The battery management system can compare the monitored measured value with a preset reference value and control the operation of the blower member 500. When the monitored measured value reaches the preset reference value, the battery management system can control the blower member 500 to operate. When the monitored measured value is less than the preset reference value, the battery management system can control the blower member 500 not to operate.

[0043] As an example, the battery management system can compare the measured pressure with a preset reference pressure and control the blower member 500 to operate when the measured pressure reaches the reference pressure. As another example, the battery management system can compare the measured gas amount with a preset reference gas amount and control the blower member 500 to operate when the measured gas amount reaches the reference gas amount. As yet another example, the battery management system can control the blower member 500 to operate when at least two measured values of the measured pressure, temperature, and gas reach preset reference values.

[0044] FIG. 3 is a diagram for specifically explaining the flow path frame illustrated in FIG. 1. Although two flow path frames are illustrated in FIG. 3, the present invention is not limited thereto, and the position and number thereof can be appropriately selected as necessary.

[0045] Referring to FIG. 3, the flow path frame 300 according to the first embodiment of the present invention can communicate with the venting gate 121 and the discharge port 430 of the battery module 100. When thermal runaway or the like occurs in the battery module 100, the flow path frame 300 can induce heat and flames to the outside, minimizing the influence on the surrounding battery modules. Here, all the flames contained in the generated high-pressure venting gas can burn while passing through the internal passage of the flow path frame 300 and can be discharged to the outside in a safer state. In addition, the flow path frame 300 can act as a support frame for stably supporting the battery module 100, improving the stability of the battery pack 101.

[0046] Such a flow path frame 300 can include a first flow path frame 310 and a second flow path frame 320. The first flow path frame 310 can communicate with the venting gates 121 of each of the plurality of battery modules 100 arranged in the first row among the plurality of battery modules 100. The second flow path frame 320 can communicate with the venting gates 121 of each of the plurality of battery modules 100 arranged in the second row among the plurality of battery modules 100.

[0047] A blower member 500 can be arranged on at least one side (e.g., the side facing the opposite direction of the y-axis) of at least one of the first flow path frame 310 and the second flow path frame 320. An exhaust port 430 can be arranged on at least one other side (e.g., the side facing the y-axis) of at least one of the first flow path frame 310 and the second flow path frame 320.

[0048] The blower member 500 can be arranged inside the internal passages of each of the flow path frames 310, 320, or can be arranged between each of the flow path frames 310, 320 and the lower housing 410. The blower member 500 can be arranged adjacent to the battery module 100 that is arranged farthest from the venting member among the plurality of battery modules 100. The blower member 500 can forcibly discharge the air in the internal passage of the flow path frame 300 to the outside through the venting member. Since the blower member 500 rotates by the rotation of the motor 510, the flow of the gas in the flow path frames 310, 320 can be accelerated. When the blower member 500 rotates, the gas in the flow path frames 310, 320 can move toward the exhaust port 430 and be discharged to the outside of the battery pack 101.

[0049] FIG. 4a and FIG. 4b are diagrams for explaining a gas discharge method of a battery pack according to a first embodiment of the present invention.

[0050] As shown in FIG. 4a, in at least one of the plurality of battery modules 100, problems such as overvoltage, overcurrent, or overheating (or heat problems) may occur. In this case, high-pressure venting gas can be discharged from the inside of the battery module 100 through the venting gate 121. The high-temperature, high-pressure gas and flame discharged through the venting gate 121 can flow into the internal passages of the flow path frames 310 and 320. The inflowing high-temperature, high-pressure gas and flame can be discharged to the outside through a venting member including at least one of the discharge ports 430, the rupture plate, and the venting valve. The gas flowing into the internal passages of the flow path frames 310 and 320 can be discharged at a first speed.

[0051] Here, the battery management system can monitor at least one of the temperature, pressure, gas volume, and gas flow rate inside the flow path frames 310 and 320 in real time or periodically. When at least one of the temperature, pressure, gas volume, and gas flow rate inside the flow path frames 310 and 320 reaches a reference value, the battery management system can control the blower member 500 to operate. The blower member 500 can perform a rotational movement by the electric power supplied to the motor 510. Due to the rotational movement of the blower member 500, the high-pressure gas and flame in the internal passage of the flow path frame 300 can be forcibly discharged to the outside through the discharge port 430 as shown in FIG. 4b. The blower member 500 can discharge the high-pressure gas and flame in the internal passage of the flow path frame 300 to the outside at a second speed. The second speed can be higher than the first speed (the performance of the venting member) at which the high-pressure gas and flame in the internal passage of the flow path frame 300 are discharged to the outside through the venting member including the discharge port 430. Thereby, since the rise in the temperature and pressure inside the battery pack 101 is suppressed, the deformation and collapse of the structure of the battery pack 101 can be prevented.

[0052] Second Embodiment FIG. 5 is a cross-sectional view showing a battery pack according to the second embodiment of the present invention. The battery pack illustrated in FIG. 5 can include the same components as the battery pack of the first embodiment illustrated in FIGS. 1 and 3, except that it further includes a storage tank 700 and a fluid supply pipe 600. Needless to say, detailed descriptions of the same components can be regarded as the content of the battery pack of the first embodiment.

[0053] Referring to FIG. 5, the battery pack 501 according to the second embodiment of the present invention can include a storage tank 700 and a fluid supply pipe 600.

[0054] The fluid supply pipe 600 can be formed by branching from the flow path frame 300. The blower member 500 disposed within the flow path frame 300 can prevent the flow of the fluid injected through the storage tank 700.

[0055] One end of the fluid supply pipe 600 can be coupled to the storage tank 700 located at least at one of the inside and outside of the pack housing 400. The other end of the fluid supply pipe 600 can communicate with the internal passage of the flow path frame 300.

[0056] The storage tank 700 can store a fluid that can be injected into the internal passage of the flow path frame 300. The fluid can be periodically filled and stored in the storage tank 700. The storage tank 700 may store at least one of a gas for discharging foreign matter and a liquid for discharging foreign matter. As an example, the gas for discharging foreign matter can include nitrogen, and the liquid for discharging foreign matter can include water.

[0057] The storage tank 700 can include a plurality of storage tanks in which different fluids or the same fluid are stored. For example, the storage tank 700 can include a first storage tank in which a gas containing nitrogen is stored and a second storage tank in which a liquid containing water is stored. The fluid can be supplied into the fluid supply pipe 600 and the flow path frame 300 in the order of the first storage tank and the second storage tank or in the reverse order. A pump (not shown) connected to the storage tank 700 pumps the fluid in the storage tank 700 so that the fluid stored in the storage tank 700 can be injected into the fluid supply pipe 600.

[0058] By injecting the fluid into the fluid supply pipe 600 and the flow path frame 300 at high pressure toward the discharge port 430, foreign matter accumulated inside the flow path frame 300 and at the discharge port 430 can be removed. The foreign matter can be generated by carbonization during ignition of the battery cell 103 or by melting at least one of the venting member including the discharge port 430 and the air blowing member 500. Thereby, through the fluid injected at high pressure, the foreign matter can be smoothly discharged to the outside of the battery pack 101.

[0059] As an example, when the temperature and pressure inside the flow path frame 300 rise despite the operation of the blower member 500 during the operation of the storage tank 700, the storage tank 700 can inject fluid into the flow path frame 300 via the fluid supply pipe 600. When at least one of the temperature and pressure of the internal passage of the flow path frame 300 reaches a preset reference value despite the operation of the blower member 500, the storage tank 700 can inject fluid into the flow path frame 300. Specifically, due to the operation of the blower member 500, the amount of gas generated from at least one of the plurality of battery modules 100 can be greater than the amount of gas discharged to the outside. In this case, the temperature and pressure inside the flow path frame 300 and inside the battery module 100 can rise. If a flame is generated and propagates due to the increase in temperature and pressure, the structures inside the battery pack may carbonize or foreign substances generated by melting may accumulate in the internal passage of the flow path frame 300 and the discharge port 430. The foreign substances can block the internal passage of the flow path frame 300 and the discharge port 430, reducing the amount of gas discharged through the flow path frame 300 and accelerating the increase in the pressure and temperature inside the battery pack 101. Therefore, the fluid injected at high pressure by the storage tank 700 can discharge the foreign substances accumulated in the internal passage of the flow path frame 300 and the discharge port 430 to the outside of the battery pack 101.

[0060] As another example, after the operation of the blower member 500 is completed, when the temperature and pressure inside the flow path frame 300 are below the reference value, the storage tank 700 can inject fluid into the flow path frame 300 via the fluid supply pipe 600. Thereby, the foreign substances accumulated in the inside of the flow path frame 300 and the discharge port 430 are smoothly discharged to the outside of the battery pack 101, and the inside of the battery pack 101 can maintain a predetermined level of pressure.

[0061] As yet another example, after the gas is discharged through the venting gate 121, the flow path frame, and the discharge port without the operation of the air blowing member 500, the storage tank 700 can inject fluid into the flow path frame 300 through the fluid supply pipe 600. Thereby, the foreign matter accumulated inside the flow path frame 300 and in the discharge port 430 is smoothly discharged to the outside of the battery pack 101, and the inside of the battery pack 101 can maintain a predetermined level of pressure.

[0062] FIGS. 6A and 6B are diagrams for explaining a gas discharge method of a battery pack according to a second embodiment of the present invention.

[0063] As shown in FIG. 6A, problems such as overvoltage, overcurrent, or overheating (heat problems) may occur in at least one of the plurality of battery modules 100. In this case, the venting gas from the inside of the battery module 100 can be discharged through the venting gate 121. The high-temperature, high-pressure venting gas and flame discharged through the venting gate 121 can flow into the interiors of the flow path frames 310 and 320. The high-temperature, high-pressure venting gas and flame that have flowed in can be discharged to the outside at a first speed through a venting member including the discharge port 430.

[0064] Here, the battery management system can monitor at least one of the temperature, pressure, gas quantity, and gas flow rate inside the flow path frames 310 and 320 in real time or periodically. When at least one of the temperature, pressure, gas quantity, and gas flow rate inside the flow path frames 310 and 320 reaches a reference value, the battery management system can control the blower member 500 to operate. For example, when the pressure in the internal passage of the flow path frames 310 and 320 rises to reach a first pressure, the battery management system can control the blower member 500 to operate. The blower member 500 can perform a rotational movement by the electric power supplied to the motor 510. Due to the rotational movement of the blower member 500, the high-pressure gas and flame inside the flow path frame 300 can be forcibly discharged to the outside through the discharge port 430. The blower member 500 can discharge the high-pressure venting gas and flame inside the flow path frame 300 to the outside at a second speed. The second speed can be higher than the first speed (or the performance of the venting member) for discharging the high-pressure venting gas and flame inside the flow path frame 300 to the outside through the venting member.

[0065] Despite the operation of the blower member 500, when at least one of the temperature, pressure, gas quantity, and gas flow rate in the internal passages of the flow path frames 310 and 320 reaches a reference value, as shown in FIG. 6b, the storage tank 700 can inject fluid into the flow path frame 300. For example, when the pressure in the internal passages of the flow path frames 310 and 320 is the first pressure or reaches a second pressure higher than the first pressure, the storage tank 700 can inject fluid into the flow path frame 300. The storage tank 700 can inject the fluid at a third pressure higher than the second pressure.

[0066] The fluid injected at a high pressure (e.g., the third pressure) by the storage tank 700 can discharge the foreign matter accumulated in the internal passage and the discharge port 430 of the flow path frame 300 to the outside of the battery pack 101. Thereby, the inside of the battery pack 101 can maintain a predetermined level of temperature and pressure.

[0067] The structure of the above-described battery pack 101 is not limited to the embodiments described in each drawing, and the structures described in each drawing can be applied in a composite manner. For example, the battery pack 101 may employ only a plurality of the blowing members 500 described in FIGS. 3, 4a, and 4b, or may employ only a plurality of the storage tank 700 and the fluid supply pipe 600 without the blowing member 500 described in FIGS. 5, 6a, and 6b, or may employ the blowing member 500, the storage tank 700, and the fluid supply pipe 600 in a composite manner as described in FIGS. 5, 6a, and 6b.

[0068] In addition, the above-described battery pack 101 can be applied to various devices. It can be applied to transportation means such as electric bicycles, electric vehicles, and hybrids, but is not limited thereto, and is applicable to all various devices that can use the battery pack 101.

[0069] As described above, the present invention is described by limited embodiments and drawings, but the present invention is not limited thereby, and various implementations are possible within the equivalent scope of the technical idea of the present invention and the scope of the claims described below by those having ordinary knowledge in the technical field to which the present invention pertains.

Explanation of Reference Numerals

[0070] 101 Battery pack 100 Battery module 120 End plate 121 Venting gate 430 Outlet 500 Blowing member 510 Motor 300, 310, 320 Flow path frame 600 Fluid supply pipe 700 Storage tank

Claims

1. A plurality of battery modules; A flow path frame disposed along at least a part of the periphery of the plurality of battery modules, forming an internal passage; A battery pack comprising a blower member communicating with one end of the internal passage of the flow path frame to control the gas discharge speed in the internal passage.

2. The battery pack according to claim 1, further comprising a discharge port communicating with the other end of the internal passage.

3. A pack housing for housing the battery module and the flow path frame; A storage tank disposed in at least one of the inside and the outside of the pack housing; Further comprising a fluid supply pipe disposed between the storage tank and the flow path frame, The battery pack according to claim 1, wherein the fluid stored in the storage tank is supplied to the internal passage of the flow path frame through the fluid supply pipe.

4. The battery pack according to claim 3, wherein the fluid is at least one of a liquid containing water and a gas containing nitrogen.

5. The blower member operates when the pressure in the internal passage is a first pressure, The battery pack according to claim 3, wherein the storage tank operates when the pressure in the internal passage is the first pressure or a second pressure higher than the first pressure after the operation of the blower member.

6. The battery pack according to claim 5, wherein the storage tank discharges the fluid at a third pressure higher than the second pressure.

7. The battery pack according to claim 3, wherein the fluid supply pipe is formed by branching from the flow path frame.

8. A plurality of storage tanks are provided, Any one of the plurality of storage tanks stores a gas for discharging foreign matter injected into the internal passage, The battery pack according to claim 3, wherein any one of the remaining plurality of storage tanks stores a liquid for discharging foreign matter injected into the internal passage.

9. The flow path frame includes a first flow path frame disposed along the periphery of one side of the plurality of battery modules, The battery pack according to claim 1, further comprising a second flow path frame disposed along the periphery of the other side of the plurality of battery modules.

10. The battery pack according to claim 1, wherein the blower member includes a rotary fan.

11. A device comprising the battery pack according to claim 1.

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