Battery case, and battery pack and vehicle including same

Abstract

The present invention introduces a battery case, and a battery pack and a vehicle including same, the battery case comprising: a case body accommodating batteries in an inner space; exhaust holes formed in the case body and discharging gas generated from the batteries from the inside of the case body to the outside; and a gas discharge amplifier installed on the exhaust holes to amplify the flow rate of the gas discharged through the exhaust holes.

Description

Battery case, battery pack and vehicle including the same

[0001] The present invention relates to a battery case, a battery pack, and a vehicle including the same, which prevent the spread of fire to adjacent cells or modules of a battery cell in which a problem has occurred by quickly discharging high-temperature, high-pressure battery venting gas generated inside the battery pack case to the outside.

[0002] Recently, technologies for carbon reduction are being actively developed to address environmental issues such as extreme temperatures. To achieve this, energy must be produced using environmentally friendly methods rather than relying on fossil fuels. This energy must be stored as electricity, and the stored electricity must be used in vehicles, various industrial sites, and homes.

[0003] To utilize electric energy for carbon reduction, the use of batteries capable of storing and extracting electric energy is essential. Therefore, ensuring battery performance is essential to sufficiently store electric energy and ensure hassle-free use.

[0004] Batteries primarily utilize redox reactions of metal ions. To increase battery capacity, charge / discharge performance, and efficiency, high-density metal ions are used. Extensive research is also being conducted on electrolyte components and solid electrolytes. However, as battery performance advances, stability generally declines.

[0005] Batteries used in vehicles, industrial applications, and homes are manufactured as physical units called packs. Battery packs contain multiple battery cells within a sealed case, preventing fire from spreading to the outside in the event of a battery overheating or other accident. They also protect the internal battery cells from deterioration caused by the external environment or physical damage.

[0006] A battery pack contains multiple battery cells, housed in an intermediate form called a module or assembly (CMA, Cell Module Assembly). A battery module or assembly is composed of multiple battery cells assembled into a single module or assembly. These modules are then fastened within the pack case, completing the battery pack. Maintenance is facilitated by allowing maintenance to be performed on a module or assembly basis.

[0007] The multiple unit battery cells that make up a module or assembly are comprised of anodes, cathodes, and electrolytes. Because battery cells generate heat during charging and discharging, effective heat dissipation is essential. Furthermore, from the perspective of battery modules, assemblies, and battery packs, designing for efficient heat dissipation is essential to prevent safety accidents.

[0008] Meanwhile, batteries can deteriorate due to manufacturing errors, excessive charging and discharging, and aging. If battery deterioration persists, it can ultimately lead to fire. Therefore, proactive measures are necessary to prevent battery fires. To achieve this, it's crucial to continuously monitor the battery's condition, proactively detect and respond to problems, and minimize damage in the event of an unexpected problem.

[0009] The matters described as background technology above are only intended to enhance understanding of the background of the present invention, and should not be taken as an admission that they correspond to prior art already known to those of ordinary skill in the art.

[0010] The present invention has been proposed to solve such problems, and provides a battery case, a battery pack, and a vehicle including the same, which can prevent the spread of fire to other adjacent battery cells or modules within the case by quickly discharging gas generated when a fire occurs in some battery cells or modules within the battery pack case to the outside of the battery case.

[0011] The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0012] In order to achieve the above object, a battery case according to the present invention comprises: a case body having a battery built into an internal space; an exhaust hole formed in the case body for exhausting gas generated from the battery inside the case body to the outside of the case body; and a gas exhaust amplifier installed in the exhaust hole for amplifying the flow rate of gas exhausted through the exhaust hole.

[0013] The gas exhaust amplifier may include an exhaust pipe and a pressure section formed in the exhaust pipe to amplify the flow rate of gas discharged through the exhaust pipe by introducing high-pressure gas into the exhaust pipe.

[0014] The exhaust pipe may have its inlet connected to the outlet side of the exhaust hole.

[0015] The pressure section may include a connection section formed in the exhaust pipe and a high-pressure providing section that provides high-pressure gas to the inside of the exhaust pipe through the connection section.

[0016] The high-pressure supply unit may be a connecting line connecting the internal space of the case body and the connecting unit.

[0017] The connecting line can be integrally molded into the gas exhaust amplifier or case body.

[0018] The high pressure supply unit may be a gas compressor.

[0019] The high pressure supply unit may be an inflator.

[0020] The high-pressure supply unit can be activated when an abnormality in the battery is detected and provide high-pressure gas to the inside of the exhaust pipe.

[0021] A relief valve is provided between the internal space of the case body and the gas exhaust amplifier. The relief valve normally blocks the exhaust hole and can be opened when the gas inside the case body exceeds a certain pressure.

[0022] A vane is provided on the inlet side of the relief valve, and an inclined wing is formed on the vane to form a vortex in the gas introduced into the relief valve.

[0023] The vane can be formed so that its inner diameter becomes narrower as it approaches the relief valve side.

[0024] A plurality of wings can be formed spaced apart along the circumference on the inner surface of the vane.

[0025] An installation groove is formed on the exhaust hole outlet side of the case body, and the gas exhaust amplifier may include an introduction part inserted into the installation groove and an exhaust pipe extending outward from the introduction part.

[0026] The introduction part of the gas exhaust amplifier is opened toward the exhaust hole, and a relief valve can be inserted into the introduction part.

[0027] With the exhaust hole in between, the relief valve can be installed on the outside of the case body and the vane can be installed on the inside of the case body.

[0028] A baffle may be provided at the inlet side of the vane to reduce the flow rate of the gas.

[0029] The baffle may have a through hole through which gas flows and a slope formed around the through hole to reduce the flow rate of the gas.

[0030] The baffle is equipped with a mesh to filter out particulate matter contained in the gas.

[0031] The through hole of the baffle is formed at the bottom of the baffle, and the inclined portion can be inclined downward.

[0032] The through hole in the baffle can be formed at the point facing the vane.

[0033] The battery pack and vehicle of the present invention include the battery case described above.

[0034] According to the battery case of the present invention, and the battery pack and vehicle including the same, even when a fire occurs in some battery cells, modules, assemblies, etc. inside the battery case, the generated high-temperature and high-pressure gas can be quickly discharged to the outside of the battery case, thereby preventing the spread of secondary fire caused by the generated gas.

[0035] The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention belongs from the description below.

[0036] FIG. 1 is a drawing showing a case body of a battery case according to one embodiment of the present invention.

[0037] FIG. 2 is a drawing showing a relief valve of a battery case according to one embodiment of the present invention.

[0038] FIG. 3 is a drawing showing a gas discharge amplifier of a battery case according to one embodiment of the present invention.

[0039] Fig. 4 is a drawing showing a state in which a gas discharge amplifier is combined with the case body of the battery case illustrated in Fig. 1.

[0040] FIG. 5 is a drawing showing a vane of a battery case according to one embodiment of the present invention.

[0041] FIG. 6 is a drawing showing a baffle of a battery case according to one embodiment of the present invention.

[0042] Fig. 7 is a drawing showing a state in which a baffle is combined with the case body of the battery case illustrated in Fig. 1.

[0043] Fig. 8 is a cross-sectional view of a battery case according to one embodiment of the present invention.

[0044] Fig. 9 is a cross-sectional view of a battery case according to another embodiment of the present invention.

[0045] Fig. 10 is a drawing showing a battery case according to another embodiment of the present invention.

[0046] Fig. 11 is a drawing showing a battery pack and a vehicle to which the battery case of the present invention is applied.

[0047] In describing the embodiments disclosed in this specification, detailed descriptions of related known technologies will be omitted if it is determined that such detailed descriptions may obscure the gist of the embodiments disclosed in this specification. In addition, the attached drawings are provided solely to facilitate understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included within the spirit and technical scope of the present invention.

[0048] Terms that include ordinal numbers, such as "first," "second," etc., may be used to describe various components, but these components are not limited by these terms. These terms are used solely to distinguish one component from another. Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0049] In this specification, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0050] The suffixes "module" and "part" used for components in the following description are given or used interchangeably only for the convenience of writing specifications, and do not have distinct meanings or roles in themselves.

[0051] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0052] The controller may include a communication device that communicates with other controllers or sensors to control the function in charge, a memory that stores operating system or logic commands and input / output information, and one or more processors that perform judgments, calculations, decisions, etc. necessary for controlling the function in charge.

[0053] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components are given the same reference numbers and redundant descriptions thereof will be omitted.

[0054] The present invention relates to a battery case, a battery pack (BP) and a vehicle (V) using the battery case. The battery case of the present invention will be described with reference to FIG. 1. The battery case comprises a case body (100) as its main component. The case body (100) is a hollow structure and comprises a bottom surface and side walls surrounding the periphery of the bottom surface. A plurality of batteries (B) are mounted inside. The batteries are mounted in the case body (100) in the form of a battery module or assembly by assembling a plurality of cells to form a module or assembly. A lid is coupled to the case body (100) to seal the battery case.

[0055] Batteries housed within a battery case normally operate within a desired temperature range. However, due to battery aging, environmental influences, or manufacturing tolerances, specific battery cells may deteriorate more rapidly. In such cases, it is necessary to prevent secondary fires or explosions in the surrounding area by venting gases generated within the battery cell. By quickly discharging vented gases from a battery cell that has caught fire or has caught fire, the fire can be prevented from spreading to adjacent battery cells or modules, thereby preventing larger, more catastrophic fires.

[0056] Gas generated from batteries may contain flammable particulates and is vented at high temperatures and pressures. Therefore, the velocity of this vented gas must be reduced while ensuring a high flow rate at the point of discharge. By reducing the velocity of the vented gas, the attack on the inner walls of the battery case is reduced, while ensuring a high flow rate prevents internal fire spread.

[0057] Specifically, a battery case according to the present invention includes a case body (100) in which a battery is built into an internal space; an exhaust hole (124) formed in the case body (100) and discharging gas generated from a battery (B) inside the case body (100) to the outside of the case body (100); and a gas discharge amplifier (300) installed in the exhaust hole (124) and amplifying the flow rate of gas discharged through the exhaust hole (124).

[0058] Fig. 1 illustrates a case body (100) without a gas exhaust amplifier installed, and an installation groove (122) of a certain size is formed in the front portion (120) of the side wall of the case body (100). This installation groove (122) may be formed in various points in the case body (100) where gas venting is possible, and is not limited to the front portion (120) of the side wall as illustrated.

[0059] An exhaust hole (124) is formed in the installation groove (122) formed in the case body (100). The exhaust hole (124) connects the inside and outside of the case body (100), and can be considered the only part in the sealed case body (100) through which internal gas can be discharged to the outside. This allows the battery case to be sealed, stably controlling the battery, and safely venting gas to a desired location when gas is generated inside.

[0060] The exhaust hole (124) of the case body (100) should be kept closed under normal circumstances, and should be opened when excessive pressure occurs within the case to relieve the internal overpressure and discharge gas, thereby preventing the spread of fire. To this end, a relief valve (400) as shown in Fig. 2 is provided in the exhaust hole (124). The relief valve will be described later.

[0061] And, the gas discharge amplifier (300) of Fig. 3 is installed on the outlet side of the relief valve (400). Fig. 4 shows a battery case with such a gas discharge amplifier (300) installed. The gas inside the battery case is first discharged by passing through the relief valve (400). And, since the probability of fire spreading inside is reduced as the flow rate of the discharged gas is secured more, the gas passing through the relief valve (400) is discharged to the outside through the gas discharge amplifier (300).

[0062] The gas exhaust amplifier (300) may include an exhaust pipe (320) and a pressure section formed in the exhaust pipe (320) to amplify the flow rate of gas discharged through the exhaust pipe (320) by introducing high-pressure gas into the exhaust pipe (320), as shown in the cross-sectional view of FIG. 8.

[0063] The gas exhaust amplifier (300) is basically composed of an exhaust pipe (320) for exhausting gas. A pressure unit is connected to the exhaust pipe (320) so that high-pressure gas can be introduced from the outside. The pressure unit can be connected through a connection unit (322) such as a nipple. High-pressure gas is supplied from the pressure unit, and the high-pressure gas is introduced into the inner surface of the exhaust pipe (320) through the nipple, etc. Due to such high-pressure external pressure, the vented gas passing through the inside of the exhaust pipe (320) increases in velocity and flow rate according to Bernoulli's principle. The gas exhaust amplifier (300) is also called an air amplifier, and various existing technologies can be applied thereto.

[0064] In the case of the present invention, the gas discharge amplifier (300) is used at the outlet side of the relief valve (400) of the battery case to further amplify and discharge the vented gas, thereby quickly discharging the gas inside to the outside.

[0065] To this end, the exhaust pipe (320) of the gas exhaust amplifier (300) can have its inlet connected to the outlet side of the exhaust hole (124). The exhaust pipe (320) has a shape of a pipe that extends long toward the outside of the battery case. Therefore, in the battery, the high-temperature and high-pressure gas inside is vented through the exhaust hole (124) at a desired point to prevent damage to other components such as the vehicle, and damage to the surroundings is minimized by venting through the exhaust pipe (320) at a desired point. Furthermore, since it is discharged through the gas exhaust amplifier (300), it is possible to protect other batteries inside the case. Therefore, according to the present invention, it is possible to discharge gas and prevent fire while ensuring safety both inside and outside the battery pack (BP).

[0066] Meanwhile, the pressure section of the gas exhaust amplifier (300) may include a connection section (322) formed in the exhaust pipe (320) and a high-pressure supply section (340) that provides high-pressure gas to the inside of the exhaust pipe (320) through the connection section (322). The connection section (322) may be in the form of a nipple (322) as illustrated, or may be in the form of a hole (342) integrally formed in the exhaust pipe. High-pressure gas from the outside is introduced into the inside of the exhaust pipe (320) through the connection section (322).

[0067] In the case of the high-pressure supply unit (340), it may be a connecting line (360) connecting the internal space of the case body (100) and the connecting unit. In the case where the amplification process of the gas exhaust amplifier (300) is required, this may be the case where high-pressure venting gas is first generated inside the case body (100). Therefore, the venting gas inside the case body (100) is used to amplify the flow rate and volume of the gas flowing in the exhaust pipe (320). In the case of the gas flowing in the exhaust pipe (320), the flow rate and volume decrease as it passes through many components such as the baffle (700), the vane (500), and the valve (400). Therefore, if high-pressure gas inside the case body (100) is additionally introduced here, the flow rate and volume of the gas flowing in the exhaust pipe (320) may increase. Therefore, in one embodiment of the present invention, the exhaust pipe (320) and the interior of the case body (100) may be connected by the connecting line (360). In addition, since high-temperature and high-pressure gas flows through the connecting line (360), it can be formed with a material such as a metal with good heat resistance, or, as shown in FIG. 10, the connecting line (360) can be formed integrally with the gas exhaust amplifier (300) or the case body (100). By forming the connecting line (360) integrally with the gas exhaust amplifier (300) or the case body (100), there is no need to manufacture and assemble a separate connecting line, thereby reducing manufacturing costs. In addition, since assembly errors do not occur, the connecting line can be sealed more reliably and the gas inside the case body can be safely transmitted to the exhaust pipe. In this case, a separate connecting line (360) is formed on the outer surface of the gas exhaust amplifier (300) or the case body (100), and it is also possible to form it together with the shape of the mold when forming the gas exhaust amplifier (300) or the case body (100), or to join the separate line to the gas exhaust amplifier (300) or the case body (100) by welding or other methods.

[0068] Alternatively, the high-pressure supply unit (340) may be a gas compressor. The exhaust pipe (320) requires a higher-pressure gas than the gas originally flowing inside. Therefore, it is possible to install a separate compressor in the vehicle and provide high-pressure gas inside the exhaust pipe through this. In this case, external air may be compressed and supplied, or an inert gas may be supplied from a tank, compressed, and then supplied to prevent explosion.

[0069] Alternatively, the high-pressure supply unit (340) may be an inflator. FIG. 9 illustrates a case where the inflator (340) is installed adjacent to the exhaust pipe (320). In this case, when gas venting is detected as necessary in the case body (100), the inflator (340) is activated, and the inflator (340) operates with gunpowder, etc., and the inert gas is discharged at a high pressure instantaneously. In this way, the gas generated in the inflator (340) is directly introduced into the exhaust pipe (320), thereby amplifying the gas flowing through the exhaust pipe (320). The inflator (340) is currently widely used in airbags of vehicles, and can be fixed to the side of the exhaust pipe (320) and connected through a connecting line or hole (342), etc. The inflator (340) is very advantageous in terms of response speed because it forms an instantaneous pressure by an electrical signal. Additionally, because it is relatively small in volume and weight, it has the advantage of being sufficiently applicable to existing battery packs without requiring design changes.

[0070] Meanwhile, the high-pressure supply unit (340) can be activated when an abnormality in the battery is detected and supply high-pressure gas to the inside of the exhaust pipe (320). To this end, a sensor that detects fire or pressure must be provided inside the battery pack, and a controller capable of controlling the high-pressure supply unit (340) must be provided.

[0071] Meanwhile, as shown in FIG. 8, a relief valve (400) of FIG. 2 is provided between the internal space of the case body (100) and the gas exhaust amplifier (300). The relief valve (400) normally blocks the exhaust hole and can be opened when the gas inside the case body has a pressure higher than a certain level. The relief valve (400) normally blocks the exhaust hole (124) through an elastic body such as a spring, so that the valve stem. In addition, when excessive pressure occurs, the spring is compressed and the stem is opened to relieve the overpressure.

[0072] The gas exhaust amplifier (300) is provided with a box-shaped housing (310), a relief valve (400) is mounted on the housing (310), and the housing (310) can be mounted on an installation groove (122) of a case body (100). In addition, an exhaust pipe (320) extends to the opposite side of the housing (310). Accordingly, gas discharged through the relief valve (400) is prevented from leaking to the outside and is distributed only through the exhaust pipe (320).

[0073] In addition, a vane (500) as shown in FIG. 5 is provided on the inlet side of the relief valve (400), and an inclined wing (540) is formed on the vane (500) to form a vortex in the gas introduced into the relief valve (400). In addition, the vane (500) may be formed so that its inner diameter becomes narrower as it goes toward the relief valve (400), and a plurality of wings (540) may be formed spaced apart from each other along the circumferential direction on the inner surface of the vane (500).

[0074] The vane (500) can be applied in various shapes, and if the inside (520) of the vane (500) is formed in a shape in which the diameter gradually narrows like a funnel, a spiral vortex like a whirlpool can be easily formed. In addition, if a plurality of inclined wings (540) are formed on the inner surface, an even stronger vortex is formed in the vane (500). Since the vane (500) forms a spiral vortex together with the inner wings (540), the gas with a lowered velocity due to the baffle (700) can be concentrated on the relief valve (400), and it plays a role in sucking up the gas around the vane (500). Through the shape of the vane (500), the gas around the vane (500) is quickly concentrated on the relief valve (400), thereby quickly preventing the spread of fire inside the battery case.

[0075] The housing (310) of the gas exhaust amplifier (300) serves as an introduction portion, and the introduction portion is opened toward the exhaust hole (124), and a relief valve (400) can be inserted into the introduction portion. Then, with the exhaust hole (124) in between, the relief valve (400) can be installed on the outside of the case body (100), and the vane (500) can be installed on the inside of the case body (100).

[0076] In particular, a baffle (700) for reducing the flow rate of gas, such as in FIG. 6, may be provided on the inlet side of the vane (500). The baffle (700) may be formed with a through hole (720) through which gas flows and an inclined portion (740) formed at an angle around the through hole (720) to reduce the flow rate of gas. Gas vented from the battery cell may contain flammable fine particles, which may cause damage if they directly hit the components of the case body (100) with instantaneous pressure. Therefore, the initially vented gas needs to have its speed reduced instantaneously, and it needs to be prevented from directly hitting the exhaust hole (124). In addition, in order to properly filter through the mesh (760), damage to the mesh (760) must also be prevented, so the gas needs to have its speed reduced first through the baffle (700). To this end, the baffle (700) has the shape of a housing having a certain area, the through hole (720) of the baffle (700) is formed at the bottom of the baffle (700), and the inclined portion (740) can be inclined downward.

[0077] And the baffle (700) may be provided with a mesh (760) to filter out particulates contained in the gas, and the through hole (720) of the baffle (700) may be formed at a point facing the vane (500).

[0078] Through this configuration, the baffle (700) is inserted and fixed into the groove (170) of the case body (100), a mesh (760) is provided inside, and a through hole (720) is formed in the lower part of the baffle (700) so that gas is vented to the outside through the lower part of the case body (100). A vane (500) and an exhaust hole (124) are formed in the lower part of the case body (100) so that gas can be exhausted, and this is protected by the mesh (760) and the inclined portion (740).

[0079] The gas generated inside the case body (100) is first guided downward through the downwardly inclined portion (740), and its velocity is reduced by colliding with the inclined portion (740). In addition, combustible fine particles are filtered out as it passes through the mesh (760). Thereafter, it passes through the vane (500), generating a vortex, which increases its velocity again, and the velocity, which is reduced by passing through the relief valve (400), is amplified and discharged again through the gas discharge amplifier (300).

[0080] Therefore, the high-temperature, high-pressure gas generated inside the battery case is reduced in the necessary locations to reduce the aggressiveness of the gas and protect the components, and the overall gas discharge is secured by increasing the velocity and flow rate in the necessary locations.

[0081] Although the present invention has been illustrated and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that the present invention may be variously improved and modified without departing from the technical spirit of the present invention as defined by the following claims.

Claims

1. Case body with a built-in battery inside; An exhaust hole formed in the case body and discharging gas generated from the battery inside the case body to the outside of the case body; and A battery case including a gas discharge amplifier installed in the exhaust hole and amplifying the flow rate of gas discharged through the exhaust hole.

2. In claim 1, The above gas exhaust amplifier includes an exhaust pipe and a pressure section formed in the exhaust pipe to amplify the flow rate of gas discharged through the exhaust pipe by introducing high-pressure gas into the exhaust pipe. A battery case characterized in that the exhaust pipe has an inlet connected to the outlet side of the exhaust hole.

3. In claim 2, The above pressure unit includes a connection unit formed in the exhaust pipe and a high-pressure providing unit that provides high-pressure gas to the inside of the exhaust pipe through the connection unit, A battery case characterized in that the high-pressure supply unit operates when an abnormality in the battery is detected and provides high-pressure gas to the inside of the exhaust pipe.

4. In claim 3, The high pressure supply unit includes a connecting line connecting the internal space of the case body and the connecting unit, A battery case characterized in that the above connecting line is integrally formed with the gas discharge amplifier or the case body.

5. In claim 3, A battery case characterized in that the high pressure supply unit is a gas compressor.

6. In claim 3, A battery case characterized in that the high pressure supply unit is an inflator.

7. In claim 1, A battery case characterized in that a relief valve is provided at a point between the internal space of the case body and the gas exhaust amplifier, and the relief valve normally blocks the exhaust hole and opens when the gas inside the case body exceeds a certain pressure.

8. In claim 7, A vane is provided on the inlet side of the above relief valve, and an inclined wing is formed on the vane to form a vortex in the gas introduced into the relief valve. The above vane is formed so that the inner diameter becomes narrower as it goes toward the relief valve side, A battery case characterized in that the above wings are formed in multiple numbers spaced apart along the circumference direction on the inner surface of the above vane.

9. In claim 1, An installation groove is formed on the outlet side of the above exhaust hole, and the gas exhaust amplifier includes an introduction part inserted into the installation groove and an exhaust pipe extending outward from the introduction part. A battery case characterized in that the introduction part of the gas exhaust amplifier is opened toward the exhaust hole and a relief valve is inserted into the introduction part.

10. In claim 8, A battery case characterized in that the relief valve is installed on the outside of the case body and the vane is installed on the inside of the case body, with the exhaust hole in between.

11. In claim 8, A baffle is provided on the inlet side of the above vane to reduce the flow rate of gas. A battery case characterized in that the lower part of the above baffle has a through hole through which gas flows and a slope formed downwardly around the through hole to reduce the flow rate of the gas.

12. In claim 11, A battery case characterized in that the baffle is provided with a mesh to filter particulates contained in the gas.

13. In claim 12, A battery case characterized in that the through hole of the baffle is formed at a point facing the vane.

14. A battery pack characterized by including the battery case of claim 1.

15. A vehicle characterized by including the battery pack of claim 14.

Images