Battery pack

Abstract

A battery pack is disclosed. A battery pack according to one embodiment of the present invention may include: a case providing an internal space; a battery cell disposed inside the case; at least one sensor disposed inside the case; a ventilation module provided in the case and configured to be openable and closable; and a fan located inside the case.

Description

Technology Field

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

[0002] With the rapid increase in demand for portable electronic products such as laptops, video cameras, and mobile phones, and the full-scale commercialization of robots and electric vehicles, research on high-performance secondary batteries capable of repeated charging and discharging is actively underway.

[0003] Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density.

[0004] These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and an outer casing, namely a battery case, that seals and houses the electrode assembly together with an electrolyte.

[0005] Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet.

[0006] Recently, secondary batteries are widely used for driving or energy storage not only in small devices such as portable electronic devices but also in medium-to-large devices such as electric vehicles and Energy Storage Systems (ESS). These secondary batteries can form a single battery module by housing multiple batteries together inside a module case while electrically connected. Furthermore, multiple such battery modules can be connected to form a single battery pack.

[0007] However, when multiple secondary batteries (battery cells) or battery modules are densely packed in a confined space as described above, they may be vulnerable to thermal events. In particular, if an event such as thermal runaway occurs in a single battery cell, high-temperature gases, flames, or heat may be generated. If these gases, flames, or heat are transferred to other battery cells within the same battery module, an explosive chain reaction situation, such as thermal propagation, may occur. Furthermore, such a chain reaction can not only cause accidents such as fire or explosion in the affected battery module but also trigger fires or explosions in other battery modules.

[0008] Furthermore, in the case of medium to large battery packs, such as those found in electric vehicles, the risk of thermal chain reactions can be even greater because they contain a large number of battery cells and modules to increase output and / or capacity. In addition, users, such as drivers, may be present in the vicinity of battery packs installed in electric vehicles. Therefore, if a thermal event originating in a specific battery module is not properly controlled and triggers a chain reaction, it can result in significant property damage as well as loss of life. The problem to be solved

[0009] The present invention aims to solve the aforementioned problems and other problems.

[0010] Another objective of the present invention may be to provide a battery pack capable of suppressing heat propagation.

[0011] Another objective of the present invention may be to provide a battery pack capable of discharging gas resulting from a thermal event to the outside.

[0012] Another objective of the present invention may be to provide a battery pack capable of blocking the propagation of flames or fires caused by thermal events to the outside. means of solving the problem

[0013] A battery pack according to one embodiment of the present invention for achieving the above-mentioned purpose may include: a case providing an internal space; a battery cell disposed inside the case; at least one sensor disposed inside the case; a ventilation module provided in the case and configured to be openable and closable; and a fan located inside the case.

[0014] In addition, the battery pack may further include an air filter provided in the case.

[0015] Additionally, the ventilation module may include: an extended opening; and a plurality of shutters configured to open and close the opening.

[0016] In addition, the above-mentioned fans may be provided in multiple numbers and arranged along the longitudinal direction of the opening.

[0017] In addition, the battery pack may further include a processor electrically connected to the battery cell.

[0018] In addition, the battery cell may be placed between the processor and the ventilation module.

[0019] In addition, the battery pack may further include a connector provided in the case and configured to be connected to an external device.

[0020] In addition, the battery cell may be placed between the connector and the ventilation module.

[0021] Additionally, the at least one sensor may include a plurality of temperature sensors, and the battery pack may further include a processor that opens the ventilation module and operates the fan when the difference between the maximum and minimum values ​​of temperature values ​​measured by each of the plurality of temperature sensors exceeds a first value.

[0022] In addition, the processor may close the ventilation module if the difference between the maximum and minimum values ​​of the temperature values ​​measured by each of the plurality of temperature sensors exceeds a second value greater than the first value.

[0023] Additionally, the at least one sensor may include a plurality of pressure sensors, and the battery pack may further include a processor that opens the ventilation module and operates the fan when the difference between the maximum and minimum values ​​of the pressure values ​​measured by each of the plurality of pressure sensors exceeds a third value.

[0024] In addition, the processor may close the ventilation module if the difference between the maximum and minimum values ​​of the pressure values ​​measured by each of the plurality of pressure sensors exceeds a fourth value which is greater than the third value.

[0025] An automobile according to one embodiment of the present invention for achieving the above-mentioned purpose includes a battery pack according to the present invention. Effects of the invention

[0026] According to at least one of the embodiments of the present invention, a battery pack capable of suppressing heat propagation can be provided.

[0027] According to at least one embodiment of the present invention, a battery pack capable of discharging gas caused by a thermal event to the outside can be provided.

[0028] According to at least one embodiment of the present invention, a battery pack capable of blocking the propagation of flames or fire caused by thermal events to the outside can be provided. Brief explanation of the drawing

[0029] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a drawing showing a battery pack according to one embodiment of the present invention. FIG. 2 is a configuration diagram of a battery pack according to one embodiment of the present invention. Figure 3 is a diagram showing the interior of a battery pack along the cutting line A-A' of Figure 1. FIG. 4 is a drawing showing a ventilation module of a battery pack according to one embodiment of the present invention. Figure 5 is a drawing showing an example of a modified battery pack according to the cutting line A-A' of Figure 1. FIGS. 6 and FIGS. 7 are drawings showing an air filter according to an embodiment of the present invention. Figure 8 is a diagram showing the interior of a battery pack along the cutting line A-A' of Figure 1. FIG. 9 is a drawing showing a battery pack according to another embodiment of the present invention. FIG. 10 is a configuration diagram of a battery pack according to another embodiment of the present invention. Figures 11 and 12 are drawings showing the interior of a battery pack along the cutting line B-B' of Figure 10. FIG. 13 is a control configuration diagram of a battery pack according to one embodiment of the present invention. FIG. 14 is a control flowchart of a battery pack according to one embodiment of the present invention. Specific details for implementing the invention

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0031] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all aspects of the technical concept of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0032] FIG. 1 is a drawing showing a battery pack according to an embodiment of the present invention. FIG. 2 is a configuration diagram of a battery pack according to an embodiment of the present invention. FIG. 3 is a drawing showing the interior of a battery pack along the cutting line A-A' of FIG. 1. Referring to FIG. 1 to 3, a battery pack according to an embodiment of the present invention may include a case (100), a battery cell (210), at least one sensor (220, 230), a ventilation module (300), and a fan (400).

[0033] The case (100) may provide an internal space. The case (100) may have a rectangular shape. The case (100) may be composed of multiple parts. The multiple parts may be fastened, joined, welded, or attached. The case (100) may be composed of a top plate (140), a base plate (150), a front plate (110), a rear plate (120), and a side plate (130).

[0034] The battery module (200) may be located inside the case (100). The battery module (200) may be provided in multiple numbers. The battery module (200) may be fastened, joined, welded, attached, or fixed to at least one of the base plate (150), side plate (130), front plate (110), rear plate (120), and top plate (140) of the case (100).

[0035] The battery module (200) may include a battery cell (210). In this case, the battery cell (210) may refer to a secondary battery. The battery cell (210) may have a cylindrical shape. The battery module (200) may include a plurality of battery cells (210). The plurality of battery cells (210) may form an array or be stacked.

[0036] The battery module (200) may include at least one sensor (220, 230). The sensor (220, 230) may detect the state of the battery cell (210). To detect the state of a plurality of battery cells (210), a plurality of sensors (220, 230) may be distributed and arranged at multiple locations of the battery module (200).

[0037] A ventilation module (300) may be provided in the case (100). For example, the ventilation module (300) may be provided in the front plate (110). The ventilation module (300) may be installed, fastened, coupled, fixed, welded, or attached to the case (100). The ventilation module (300) may be configured to be openable and closable. The ventilation module (300) may connect or block the internal space of the case (100) with the outside of the case (100). When the ventilation module (300) is open, the internal space of the case (100) and the outside may be connected. When the ventilation module (300) is closed, the internal space of the case (100) and the outside may be blocked.

[0038] The fan (400) may be located inside the case (100). The fan (400) may be fastened, joined, welded, attached, or fixed to at least one of the base plate (150), side plate (130), front plate (110), rear plate (120), top plate (140), or ventilation module (300) of the case (100). The fan (400) may be positioned adjacent to the ventilation module (300). Alternatively, the fan (400) may be positioned facing the ventilation module (300). Alternatively, the fan (400) may form a flow toward the ventilation module (300).

[0039] According to this configuration of the present invention, the interior of the battery pack may optionally be connected to the outside. Additionally, the battery pack may open and close the ventilation module (300) based on the state of the battery cell (210). Furthermore, when the ventilation module (300) is open, the battery pack may drive the fan (400) to increase the venting efficiency. As a result, the thermal safety of the battery pack may be improved. For example, if a thermal event occurs in the battery module (200), the temperature or pressure inside the battery pack may rise or venting gas (g) may be generated. At this time, if the ventilation module (300) is opened and the fan (400) is driven, the temperature or pressure inside the battery can be rapidly lowered and the venting gas (g) can be rapidly discharged to the outside.

[0040] Referring to FIGS. 1 to 3, a battery pack according to one embodiment of the present invention may include one or more sensors (220, 230). Each battery module (200) may include one or more sensors (220, 230). For example, each battery module (200) may include four pressure sensors (230) and four temperature sensors (220). The plurality of pressure sensors (230) and temperature sensors (220) may be distributed and positioned along the distribution of the plurality of battery cells (210). The plurality of pressure sensors (230) and temperature sensors (220) can detect pressure and temperature around the plurality of battery cells (210).

[0041] FIG. 4 is a drawing showing a ventilation module (300) of a battery pack according to an embodiment of the present invention. Referring to FIG. 4, the ventilation module (300) according to an embodiment of the present invention may include an elongated opening (301) and a plurality of shutters (310) configured to open and close the opening (301). FIG. 4 (a) may show the ventilation module (300) in an open state, and FIG. 4 (b) may show the ventilation module (300) in a closed state. The ventilation module (300) may have an opening (301) that extends elongated along the left-right direction or the Y-axis direction. The shutters (310) may extend elongated along the left-right direction or the Y-axis direction. The shutters (310) may be composed of a plurality and may be arranged along the up-down direction or the Z-axis direction. The shutters (310) may open and close the opening (301). Each of the multiple shutters (310) can be swung.

[0042] When the ventilation module (300) is closed, the ventilation module (300) can prevent moisture or foreign matter from entering the interior of the case (100) through the opening (301). To this end, the shutter (310) may be made of EPDM (ethylene propylene diene monomer) material.

[0043] According to this configuration of the present invention, the ventilation module (300) can optionally waterproof or dustproof the interior of the case (100).

[0044] FIG. 5 is a drawing showing a modified embodiment of a battery pack according to the cutting line A-A' of FIG. 1. Referring to FIG. 5, the fans (400) of the battery pack according to one embodiment of the present invention may be provided in plurality and arranged along the longitudinal direction of the opening (301). The plurality of fans (400) may be arranged along the left-right direction or the Y-axis direction. The plurality of fans (400) may face the ventilation module (300). Or the plurality of fans (400) may form a flow toward the ventilation module (300). The plurality of fans (400) may be installed on a bracket (410). The bracket (410) may be fastened, coupled, welded, attached, or fixed to at least one of the base plate (150), side plate (130), front plate (110), rear plate (120), top plate (140), or ventilation module (300) of the case (100). For example, one side of the bracket (410) can be fastened to the side plate (130) by a fastening member (S).

[0045] FIGS. 6 and 7 are drawings showing an air filter (600) according to an embodiment of the present invention. Referring to FIGS. 6 and 7, a battery pack according to an embodiment of the present invention may include an air filter (600). The air filter (600) may be provided in a case (100). For example, the air filter (600) may be provided in a rear plate (120). The rear plate (120) may have a hole (121). The air filter (600) may include a fastening part (620) that is fastened to the hole (121), a filter part (610) that allows air to pass through, and a sealing ring (630) provided between the filter part (610) and the fastening part (620). The air filter (600) may allow air to pass through so that the air pressure inside the case (100) and the air pressure outside become equal. Additionally, the air filter (600) can prevent external moisture or foreign substances from penetrating into the case (100).

[0046] According to this configuration of the present invention, the battery pack can maintain the air pressure inside and outside the case (100) to be equal through the air filter (600). Additionally, if the air pressure or temperature inside the case (100) rises and it becomes difficult to maintain the appropriate temperature or pressure using only the air filter (600), the battery pack can additionally open the ventilation module (300).

[0047] FIG. 8 is a diagram showing the interior of a battery pack along the cutting line A-A' of FIG. 1. Referring to FIG. 8, a battery pack according to one embodiment of the present invention can close the ventilation module (300) in the event of a fire. The battery pack can close the open ventilation module (300) when the temperature and pressure inside the case (100) rise to a level where it is determined that a fire has occurred. As a result, the propagation or leakage of flames to the outside of the battery pack can be blocked.

[0048] FIG. 9 is a drawing showing a battery pack according to another embodiment of the present invention. FIG. 10 is a configuration diagram of a battery pack according to another embodiment of the present invention. FIG. 11 and FIG. 12 are drawings showing the interior of a battery pack along the cutting line B-B' of FIG. 10. Referring to FIG. 9 to FIG. 12, a battery pack according to one embodiment of the present invention further includes a processor (500) electrically connected to a battery cell (210), and the battery cell (210) may be disposed between the processor (500) and a ventilation module (300).

[0049] The processor (500) may include a BDU (510, Battery disconnect unit) and a master BMS (520, Master Battery Management System). The BDU (510) can control the output of power from the battery pack to the outside or the input of power from the outside to the battery pack through the first connector (710). The master BMS (520) may be configured to automatically exchange control information or signals of the battery pack through the second connector (720). The master BMS (520) may be electrically connected to a slave BMS (240). A slave BMS (240) may be provided for each battery module (200). The slave BMS (240) may be configured to exchange control information or status information of the battery module (200) with the master BMS (520). Additionally, the slave BMS (240) may acquire status information of the battery cell (210) included in the corresponding battery module (200).

[0050] The battery module (200) can be located between the processor (500) and the ventilation module (300). And the fan can be located between the battery module (200) and the ventilation module (300).

[0051] According to this configuration of the present invention, the venting gas (g) generated in the battery module (200) can be discharged to the outside through the ventilation module (300) without passing through the processor (500). As a result, the processor (500) may not be exposed to the high-temperature venting gas (g). Therefore, the stability of the battery pack can be improved.

[0052] Referring to FIGS. 9 to 12, a battery pack according to one embodiment of the present invention may further include a connector (700) provided in a case (100) and configured to be connected to an external device, and a battery cell (210) may be disposed between the connector and the ventilation module (300).

[0053] A ventilation module (300) may be provided on the rear plate (120). A first connector (710) and a second connector (720) may be provided on the front plate. A processor (500) may be located adjacent to the front plate (110) or adjacent to the first connector (710) and the second connector (720). Additionally, a cooling port (800) for cooling the battery pack may be provided on the front plate (110). A cooling fluid may flow through the cooling port (800).

[0054] The vehicle and the battery pack can be physically or electrically connected through the first connector (710) and the second connector (720).

[0055] According to this configuration of the present invention, the venting gas (g) generated in the battery module (200) can be discharged to the outside through the ventilation module (300) without passing through the connector (700). As a result, the connector may not be exposed to high-temperature venting gas (g). Therefore, the stability of the battery pack can be improved.

[0056] FIG. 13 is a control configuration diagram of a battery pack according to an embodiment of the present invention. FIG. 14 is a control flowchart of a battery pack according to an embodiment of the present invention. Referring to FIG. 13 and FIG. 14, at least one sensor (220, 230) of a battery pack according to an embodiment of the present invention may include a plurality of temperature sensors (220). Furthermore, a battery pack according to an embodiment of the present invention may further include a processor (500) that opens a ventilation module (300) and operates a fan (400) when the difference between the maximum value (Tmax) and the minimum value (Tmin) of the temperature values ​​measured by each of the plurality of temperature sensors (220) exceeds a first value (T1).

[0057] When a thermal event occurs in a battery cell (210), the temperature value measured by a temperature sensor (220) adjacent to the battery cell (210) where the thermal event occurred may be a maximum temperature value (Tmax). And the temperature value measured by a temperature sensor (220) adjacent to a battery cell (210) far from the battery cell (210) where the thermal event occurred may be a minimum temperature value (Tmin). For example, if the difference between the maximum temperature value (Tmax) and the minimum temperature value (Tmin) exceeds 60 degrees, the processor (500) may open the ventilation module (300) and operate the fan (400).

[0058] According to this configuration of the present invention, the battery pack can detect a thermal event and rapidly vent gas (g) to the outside. As a result, the internal temperature of the battery pack can be rapidly lowered.

[0059] Referring to FIGS. 13 and 14, a processor (500) of a battery pack according to one embodiment of the present invention may be configured to close a ventilation module (300) when the difference between the maximum value (Tmax) and the minimum value (Tmin) of the temperature values ​​measured by each of the plurality of temperature sensors (220) exceeds a second value (T2) which is greater than a first value (T1).

[0060] For example, the first value may be 60 degrees and the second value (T2) may be 200 degrees. When the difference between the maximum value (Tmax) and the minimum value (Tmin) of the temperature values ​​measured by each of the multiple temperature sensors (220) becomes greater than the second value (T2), which is greater than the first value (T1), the processor (500) determines that a fire has occurred inside the battery pack and can close the ventilation module (300) and turn off the operation of the fan (400).

[0061] According to this configuration of the present invention, the battery pack can block the propagation of flame or fire to the outside.

[0062] Referring to FIGS. 13 and 14, at least one sensor (220, 230) of a battery pack according to one embodiment of the present invention may include a plurality of pressure sensors (230). Furthermore, a battery pack according to one embodiment of the present invention may further include a processor (500) that opens a ventilation module (300) and operates a fan (400) when the difference between the maximum value (Pmax) and the minimum value (Pmin) of the pressure values ​​measured by each of the plurality of pressure sensors (230) exceeds a third value (P1).

[0063] When a thermal event occurs in a battery cell (210), the pressure value measured by a pressure sensor (230) adjacent to the cell where the thermal event occurred may be a maximum pressure value (Pmax). And the pressure value measured by a pressure sensor (230) adjacent to a battery cell (210) far from the battery cell (210) where the thermal event occurred may be a minimum pressure value (Pmin). For example, if the difference between the maximum pressure value (Pmax) and the minimum pressure value (Pmin) exceeds 1.5 bar, the processor (500) may open the ventilation module (300) and operate the fan (400).

[0064] According to this configuration of the present invention, the battery pack can detect a thermal event and rapidly vent gas (g) to the outside. As a result, the internal pressure of the battery pack can be rapidly lowered.

[0065] Referring to FIG. 13 and FIG. 14, a processor (500) of a battery pack according to one embodiment of the present invention may be configured to close the ventilation module (300) when the difference between the maximum value (Pmax) and the minimum value (Pmin) of the pressure values ​​measured by each of the plurality of pressure sensors (230) exceeds a fourth value (P2) which is greater than a third value (P1).

[0066] For example, the third value (P1) may be 1.5 bar and the second value (P2) may be 2 bar. If the difference between the maximum value (Pmax) and the minimum value (Pmin) of the pressure values ​​measured by each of the multiple pressure sensors (230) exceeds the fourth value (P2), which is greater than the third value (P1), the processor (500) determines that a fire has occurred inside the battery pack and can close the ventilation module (300) and turn off the operation of the fan (400).

[0067] According to this configuration of the present invention, the battery pack can block the propagation of flame or fire to the outside.

[0068] Referring to FIGS. 13 and 14, a processor (500) of a battery pack according to one embodiment of the present invention can determine whether the difference between the maximum value (Tmax) and the minimum value (Tmin) of the temperature values ​​measured by a plurality of temperature sensors (220) is greater than or equal to a first value (T1), and whether the difference between the maximum value (Pmax) and the minimum value (Pmin) of the pressure values ​​measured by a plurality of pressure sensors (230) is greater than or equal to a third value (P1) (S1310). At this time, the temperature values ​​measured by the plurality of temperature sensors (220) can be transmitted to the master BMS (520) through the slave BMS (240). And the pressure values ​​measured by the plurality of pressure sensors (230) can be transmitted to the master BMS (520) through the slave BMS (240). For example, the first value (T1) may be 60 degrees, and the third value (P1) may be 1.5 bar.

[0069] The processor (500) can determine whether the state is greater than or equal to a predetermined time (REF) if the difference between the maximum value (Tmax) and the minimum value (Tmin) of the temperature value is greater than or equal to a first value (T1) and the difference between the maximum value (Pmax) and the minimum value (Pmin) of the pressure value is greater than or equal to a third value (P1) (S1320). The predetermined time (REF) may be several seconds or several minutes. The predetermined time (REF) may also be referred to as the delay time (REF).

[0070] The processor (500) can open the ventilation module (300) and drive the fan (400) if the difference between the maximum temperature value (Tmax) and the minimum temperature value (Tmin) is greater than or equal to the first value (T1) and the difference between the maximum pressure value (Pmax) and the minimum pressure value (Pmin) is greater than or equal to the third value (P1) for a predetermined time (REF) or longer (S1330). The processor (500) can also transmit the battery pack status information to the VCU (Vehicle Control Unit). Additionally, the processor (500) can reduce or cut off the power delivered from the battery pack to the vehicle. Alternatively, the VCU (900) can control the processor to reduce or cut off the power delivered from the battery pack to the vehicle.

[0071] While the processor (500) opens the ventilation module (300) and drives the fan (400), it can determine whether the difference between the maximum value (Tmax) and the minimum value (Tmin) of the temperature values ​​measured by the plurality of temperature sensors (200) is greater than or equal to a second value (T2), and whether the difference between the maximum value (Pmax) and the minimum value (Pmin) of the pressure values ​​measured by the plurality of pressure sensors (230) is greater than or equal to a fourth value (P2) (S1340). The second value (T2) may be greater than the first value (T1). The fourth value (P2) may be greater than the third value (P1). For example, the second value (T2) may be 200 degrees, and the fourth value (P2) may be 2 bar. Additionally, the VCU may output a warning signal, a danger signal, or an emergency signal to the occupants of the vehicle.

[0072] The processor (500) can close the ventilation module (300) and turn off the fan (400) if the difference between the maximum value (Tmax) and the minimum value (Tmin) of the temperature value is greater than or equal to the second value (T2) and the difference between the maximum value (Pmax) and the minimum value (Pmin) of the pressure value is greater than or equal to the fourth value (P2) (S1350). The processor (500) can also transmit the status information of the battery pack to the VCU (Vehicle Control Unit). The VCU can output a warning signal, a precaution signal, a danger signal, or an emergency signal to the occupants of the vehicle. Additionally, the processor (500) can reduce or cut off the power delivered from the battery pack to the vehicle. Alternatively, the VCU (900) can control the processor to reduce or cut off the power delivered from the battery pack to the vehicle.

[0073] An automobile according to the present invention may include a battery pack according to the present invention as described above. The battery pack according to the present invention may be applied to an automobile such as an electric vehicle or a hybrid vehicle. Furthermore, the automobile according to the present invention may include various other components included in the automobile in addition to such a battery pack. For example, the automobile according to the present invention may include, in addition to the battery pack according to the present invention, a vehicle body, a motor, a control device such as an ECU (electronic control unit), etc.

[0074] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back have been used in this specification, these terms are used merely for convenience of explanation, and it is obvious to those skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0075] As described above, although the present invention has been explained 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 spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs. Explanation of the symbols

[0076] 100: Case 110: Front Plate 120: Rear plate 121: Hall 130: Side plate 140: Top Plate 150: Base Plate 200: Battery module 210: Battery cell 220: Temperature sensor 230: Pressure sensor 240: Slave BMS 300: Ventilation Module 301: Opening 310: Shutter 400: Fan 410: Bracket 500: Processor 510: BDU 520: Master BMS 600: Air filter 610: Filter section 620: Connecting part 630: Sealing ring 700: Connector 710: 1st connector 720: 2nd connector 800: Cooling port 900: VCU

Claims

Claim 1 A battery pack comprising: a case providing an internal space; a battery cell disposed inside the case; a plurality of temperature sensors disposed inside the case; a ventilation module provided in the case and configured to be openable and closable; a fan located inside the case; and a processor that, when the difference between the maximum and minimum values ​​of temperature values ​​measured by each of the plurality of temperature sensors exceeds a first value, opens the ventilation module and operates the fan, and when the difference between the maximum and minimum values ​​of temperature values ​​measured by each of the plurality of temperature sensors exceeds a second value greater than the first value, closes the ventilation module. Claim 2 A battery pack according to claim 1, further comprising an air filter provided in the case. Claim 3 In claim 1, the ventilation module comprises: a long, extended opening; and a plurality of shutters configured to open and close the opening; a battery pack. Claim 4 In claim 3, the fan is provided in multiple numbers and is a battery pack arranged along the longitudinal direction of the opening. Claim 5 In claim 1, the battery cell is a battery pack disposed between the processor and the ventilation module. Claim 6 In claim 1, the battery pack further comprises a connector provided in the case and configured to be connectable to an external device, wherein the battery cell is disposed between the connector and the ventilation module. Claim 7 A battery pack according to claim 1, further comprising a plurality of pressure sensors, wherein the processor opens the ventilation module and operates the fan when the difference between the maximum and minimum values ​​of pressure values ​​measured by each of the plurality of pressure sensors exceeds a third value. Claim 8 In claim 7, the processor closes the ventilation module when the difference between the maximum and minimum values ​​of the pressure values ​​measured by each of the plurality of pressure sensors exceeds a fourth value which is greater than the third value. Claim 9 An automobile comprising a battery pack according to any one of claims 1 to 8. Claim 10 delete Claim 11 delete

Images