CN216450712U - Battery pack and power device - Google Patents
Battery pack and power device Download PDFInfo
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- CN216450712U CN216450712U CN202122355890.6U CN202122355890U CN216450712U CN 216450712 U CN216450712 U CN 216450712U CN 202122355890 U CN202122355890 U CN 202122355890U CN 216450712 U CN216450712 U CN 216450712U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application relates to the technical field of energy storage equipment, in particular to a battery pack and a power device, wherein one end of a module in the first direction is an air inlet end, and the other end of the module is an air outlet end; the module with form the wind channel of giving vent to anger between the casing, the wind channel of giving vent to anger is including the first wind channel portion, second wind channel portion and the third wind channel portion that communicate in proper order, first wind channel portion extends in the second direction, just first wind channel portion with give vent to anger the end intercommunication, second wind channel portion extends in the third direction, third wind channel portion and air outlet intercommunication, in the first plane the orthographic projection of air outlet with the orthographic projection of module is partial coincidence at least. The application aims to solve the problem that an existing battery pack air-cooling system is low in energy utilization efficiency, and provides a battery pack and a power device.
Description
Technical Field
The application relates to the technical field of energy storage equipment, in particular to a battery pack and a power device.
Background
At present, in order to reduce the manufacturing cost of the battery pack, the battery pack is cooled by the integrated air-cooled cooling system in part of the battery pack, and in order to improve the cooling capacity, the ventilation volume in the battery pack can be increased as much as possible, but along with the increase of the ventilation volume, the heat which can be taken away by the air flow of unit volume of the battery pack in unit time is reduced, and the air flow needs to consume certain energy through the battery pack, so that the unit energy consumption can only cause smaller temperature variation of the battery pack, and further the utilization efficiency of the air-cooled cooling system of the battery pack to energy is lower.
SUMMERY OF THE UTILITY MODEL
The application aims to solve the problem that an existing battery pack air-cooling system is low in energy utilization efficiency, and provides a battery pack and a power device.
In order to achieve the purpose, the following technical scheme is adopted in the application:
one aspect of the application provides a battery pack, which comprises a shell and a module, wherein a module accommodating chamber is formed in the shell, the module is installed in the module accommodating chamber, an air outlet is formed in the shell, a cooling air duct penetrating through the module in a first direction is formed in the module, one end of the module in the first direction is an air inlet end, and the other end of the module is an air outlet end;
an air outlet duct is formed between the module and the shell, the air outlet duct comprises a first air duct portion, a second air duct portion and a third air duct portion which are sequentially communicated, the first air duct portion extends in the second direction, the first air duct portion is communicated with the air outlet end, the second air duct portion extends in the third direction, the third air duct portion is communicated with the air outlet, and the orthographic projection of the air outlet and the orthographic projection of the module are at least partially overlapped in the first plane;
the second direction is perpendicular to the first direction, the first direction and the second direction are both perpendicular to the third direction, and the first direction and the second direction are both parallel to the first plane.
Optionally, the air conditioner further comprises an air pipe, the first air duct portion is located between the shell and the module, the air pipe is installed between the shell and the module, the first air duct portion is communicated with the air outlet through the air pipe, and the second air duct portion and the third air duct portion are located in the air pipe.
The technical scheme has the beneficial effects that: the housing and the air duct can thus be formed relatively flexibly to the desired shape.
Optionally, a sealing strip extending along the edge of the air outlet end is installed between the air outlet end and the shell, and the first air duct portion is enclosed among the air outlet end, the shell and the sealing strip.
The technical scheme has the beneficial effects that: therefore, the airflow can be concentrated in the first air channel part, the airflow is not easy to dissipate, the airflow carrying sufficient heat can be discharged out of the battery pack in a concentrated manner, and the airflow does not flow to other positions of the battery pack to transfer the heat to components outside the module, so that the heat exchange efficiency is improved; moreover, the airflow is not easy to flow to the components except the module, so that the airflow is not easy to be condensed on the components, and the electric leakage risk is reduced.
Optionally, the housing includes a slot portion, a slot of the slot portion is disposed facing the air outlet end, and the sealing strip extends along an edge of the slot.
The technical scheme has the beneficial effects that: a groove part is formed on the shell, the area of the cross section of the first air duct part is increased, and proper ventilation quantity is provided for the first air duct part.
Optionally, one end of the first air channel portion in the second direction is connected to the air duct.
The technical scheme has the beneficial effects that: this has suitably increased the flow distance of part air current in first wind channel portion, has increased the air current and the time of module contact at the end of giving vent to anger, makes the more abundant and module heat transfer of air current, and the more abundant heat that absorbs the module improves to the temperature change that can bring more battery packages for the unit energy that the cooling battery package consumed reaches the purpose that improves the utilization efficiency of battery package forced air cooling to the energy.
Optionally, the tuber pipe includes first pipe portion and second pipe portion, first pipe portion extends in the third direction, the one end of second pipe portion connect in first pipe portion, the other end of second pipe portion connect in the air outlet, second pipe portion follow first pipe portion to the air outlet is to keeping away from the direction slope of module extends.
The technical scheme has the beneficial effects that: the extending direction of the second air duct portion is inclined relative to the third direction, and then the airflow is guided properly through the second air duct portion, so that sufficient air inlet volume is guaranteed, proper wind resistance can be provided, and the battery pack has a good air cooling effect and high energy utilization efficiency.
Optionally, the tuber pipe still includes the third pipe portion, first pipe portion the second pipe portion the third pipe portion with the air outlet connects gradually, the third pipe portion is in the third direction is to keeping away from extend in the direction of module.
The technical scheme has the beneficial effects that: therefore, the air pipe is provided with the third pipe part, so that the airflow is reversed again when flowing from the third air channel part to the third pipe part, and the wind resistance is further increased.
Optionally, the cross-sectional area of the third air channel portion gradually increases in a direction from the first air channel portion to the air outlet.
The technical scheme has the beneficial effects that: the ventilation capacity of the air flow in the air pipe is gradually increased, so that the battery pack has higher ventilation quantity and higher energy utilization rate.
Optionally, an air inlet duct is formed between the housing and the air inlet end, an air inlet is formed on the housing, the air inlet duct extends in the second direction, one end of the air inlet duct is communicated with the air inlet end, and the other end of the air inlet duct is communicated with the air inlet.
The technical scheme has the beneficial effects that: can produce the change of once flow direction when the air current gets into the module from the wind channel that admits air, further increased the windage that the air current flows in the battery package, and then make the air current can fully contact with the module in the module, improve the heat that the unit volume air current carried to the temperature change that the unit energy that makes for the cooling battery package consumes can bring more battery packages reaches the purpose that improves the utilization efficiency of battery package forced air cooling to the energy.
Another aspect of the present application provides a power plant including a battery pack as described herein.
The technical scheme provided by the application can achieve the following beneficial effects:
the application provides a battery package and power device, can the cubic change flow direction at least after the air current flows from the end of giving vent to anger of module, suitable increase the windage that the air current flows in the battery package, and then make the air current can fully contact with the module in the module, improve the heat that the unit volume air current carried, so that can bring more battery package's temperature variation for the unit energy that the cooling battery package consumed, reach the purpose that improves the utilization efficiency of battery package forced air cooling to the energy.
Additional features of the present application and advantages thereof will be set forth in the description which follows, or may be learned by practice of the present application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It should be apparent that the drawings in the following description are embodiments of the present application and that other drawings may be derived from those drawings by a person of ordinary skill in the art without inventive step.
Fig. 1 is a schematic perspective view of an embodiment of a battery pack provided in an embodiment of the present application;
fig. 2 is a schematic top view of a battery pack according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;
fig. 4 is a schematic cross-sectional view at B-B in fig. 2, in which the solid arrows indicate the direction of the airflow.
Reference numerals:
100-a housing;
110-an air outlet;
200-air pipe;
210-a first tube portion;
220-a second pipe portion;
230-a third tube portion;
300-a module;
310-gas outlet end;
320-an air inlet end;
330-cooling air duct;
400-a first air duct portion;
500-an air intake duct;
600-sealing strip.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As shown in fig. 1 to 4, one aspect of the present application provides a battery pack, which includes a housing 100 and a module 300, wherein a module accommodating chamber is formed in the housing 100, the module 300 is mounted in the module accommodating chamber, an air outlet 110 is formed in the housing 100, a cooling air duct 330 penetrating through the module 300 in a first direction is formed in the module 300, an air inlet end 320 is formed at one end of the module 300 in the first direction, and an air outlet end 310 is formed at the other end of the module 300 in the first direction;
an air outlet duct is formed between the module 300 and the housing 100, the air outlet duct includes a first duct portion 400, a second duct portion and a third duct portion which are sequentially communicated, the first duct portion 400 extends in the second direction, the first duct portion 400 is communicated with the air outlet end 310, the second duct portion extends in the third direction, the third duct portion is communicated with the air outlet 110, and an orthographic projection of the air outlet 110 in the first plane is at least partially overlapped with an orthographic projection of the module 300;
the second direction is perpendicular to the first direction, the first direction and the second direction are both perpendicular to the third direction, and the first direction and the second direction are both parallel to the first plane. As shown in fig. 1 to 4, x, y and z in the drawings represent x, y and z directions in a coordinate system, respectively, in the embodiment of the present application, the first direction is parallel to the z direction, the second direction is parallel to the y direction, and the third direction is parallel to the x direction.
The first plane according to the embodiment of the present application is not shown in the drawings, and the first plane may be a certain plane of the battery pack or a plane in an environment outside the battery pack; it can be understood that the air outlet end 310 has an end surface, and air outlets are distributed on the end surface.
In the battery pack provided by the embodiment of the application, the airflow enters the module 300 from the air inlet end 320 of the module 300, the module 300 is cooled, the airflow enters the first air duct portion 400 after flowing out from the air outlet end 310, the flow direction of the airflow changes from the first direction to the second direction, the airflow enters the second air duct portion when flowing to the joint of the first air duct portion 400 and the second air duct portion, the flow direction of the airflow changes from the second direction to the third direction again, then the airflow flows into the third air duct portion, and further flows out of the battery pack from the air outlet 110, because the projection of the air outlet 110 in the first plane is at least partially overlapped with the orthographic projection of the module 300, at least part of the air outlet 110 is located between the air inlet end 320 and the air outlet end 310 of the module 300, the flow direction of the airflow which flows out from the air outlet end 310 and sequentially flows in the second direction and the third direction changes again when entering the third air duct portion, that is to say, the air flow direction is changed at least three times after flowing out from the air outlet end 310 of the module 300, which properly increases the wind resistance of the air flow in the battery pack, so that the air flow can be fully contacted with the module 300 in the module 300, and the heat carried by the air flow in unit volume is increased, so that more temperature changes of the battery pack can be brought for the unit energy consumed for cooling the battery pack, and the purpose of improving the utilization efficiency of the air-cooled cooling of the battery pack on energy is achieved.
Optionally, the air duct device further includes an air duct 200, the first air duct portion 400 is located between the housing 100 and the module 300, the air duct 200 is installed between the housing 100 and the module 300, the first air duct portion 400 is communicated with the air outlet 110 through the air duct 200, and the second air duct portion and the third air duct portion are both located in the air duct 200. It is understood that the second air channel portion and the third air channel portion form an inner cavity of the air duct 200, or the second air channel portion and the third air channel portion form a part of the inner cavity of the air duct 200. Such that the housing 100 and the air duct 200 can be relatively flexibly formed into a desired shape. Of course, instead of the air duct 200, a convex hull may be formed on the housing 100 to seal the space between the edge of the convex hull and the module 300, and the convex hull extends to form the first air duct portion 400, the second air duct portion, and the third air duct portion in sequence; or no seal may be formed between the convex hull and the module 300.
Optionally, a sealing strip 600 extending along the edge of the air outlet end 310 is installed between the air outlet end 310 and the casing 100, and the first air channel portion 400 is enclosed among the air outlet end 310, the casing 100 and the sealing strip 600. It is understood that the edge of the air outlet end 310 of the sealing strip 600 extends, that is, the sealing strip 600 is connected with the air outlet end 310 and the housing 100 in a sealing manner, and the first air channel part 400 covers the end surface of the air outlet end 310 of the module 300. Therefore, the airflow can be concentrated in the first air channel part 400, the airflow is not easy to dissipate, the airflow carrying sufficient heat can be discharged out of the battery pack in a concentrated manner, and the airflow does not flow to other positions of the battery pack to transfer the heat to components outside the module 300, so that the heat exchange efficiency is improved; moreover, the airflow is not easy to flow to the components except the module 300, and further the airflow is not easy to be condensed on the components, so that the electric leakage risk is reduced. That is, the orthographic projection of the housing 100 in the second plane covers the orthographic projection of the air outlet end 310 in the second plane, most of the air flow or even all of the air flow flowing out of the air outlet end 310 flows into the first air channel portion 400, the air flow is sealed in the first air channel portion 400 by the sealing strip 600, and most of the air flow or even all of the air flow flows into the second air channel portion. Of course, no seal may be formed between the gas outlet end 310 and the housing 100.
Optionally, the housing 100 includes a slot portion, a slot of the slot portion is disposed facing the air outlet end 310, and the sealing strip 600 extends along an edge of the slot. It can be understood that the sealing strip 600 is connected to the edge of the groove body, and the sealing strip 600 is connected to the edge of the air outlet end 310, and the air outlet end 310 of the module 300, the sealing strip 600 and the inner wall of the groove body jointly enclose the first air channel portion 400. Of course, instead of providing the groove portion, a plane of the housing 100 may face the air outlet end 310 and be directly connected to the sealing strip 600, and the first air channel portion 400 may be formed between the plane, the sealing strip 600 and the air outlet end 310, and the groove portion may be formed on the housing 100 to increase the cross-sectional area of the first air channel portion 400 and provide a proper ventilation amount for the first air channel portion 400.
Alternatively, one end of the first air channel portion 400 in the second direction is connected to the air duct 200. This has suitably increased the flow distance of part air current in first wind channel portion 400, has increased the time that the air current is in the end 310 department of giving vent to anger and is in contact with module 300, makes the more abundant heat transfer with module 300 of air current, and the more abundant heat that absorbs module 300 improves to make and can bring more battery pack's temperature variation for the unit energy that the cooling battery pack consumed, reach the purpose that improves battery pack forced air cooling and cool the utilization efficiency to the energy.
Optionally, the duct 200 includes a first duct portion 210 and a second duct portion 220, the first duct portion 210 extends in a third direction, one end of the second duct portion 220 is connected to the first duct portion 210, the other end of the second duct portion 220 is connected to the air outlet 110, and the second duct portion 220 extends from the first duct portion 210 to the air outlet 110 in an inclined manner in a direction away from the module 300. It is understood that the first air channel portion 400 is an inner cavity of the first pipe portion 210, and the second air channel portion is located in an inner cavity of the second pipe portion 220. The extending direction of the second air duct portion inclines relative to the third direction, and then the airflow is guided properly through the second air duct portion, so that sufficient air inlet volume is guaranteed, proper wind resistance can be provided, and the battery pack has good air cooling effect and high energy utilization efficiency. Of course, the second tube portion 220 may also have an L-shaped configuration.
Optionally, the duct 200 further includes a third duct portion 230, the first duct portion 210, the second duct portion 220, the third duct portion 230 and the air outlet 110 are sequentially connected, and the third duct portion 230 extends in a direction away from the module 300 in the third direction. It will be appreciated that the inner cavity of the third duct portion 230 communicates with the third air channel portion. In this way, by providing the duct 200 with the third duct portion 230, the airflow is again reversed when flowing from the third duct portion to the third duct portion 230, further increasing the wind resistance.
Alternatively, the cross-sectional area of the third air channel portion gradually increases in a direction from the first air channel portion 400 to the air outlet 110. This gradually increases the ventilation capacity of the air flow in the air duct 200, so that the battery pack has both a large ventilation amount and a high energy utilization rate. Of course, the cross-sectional area of the air duct 200 in the direction of extension thereof may also be unchanged.
Optionally, an air inlet duct 500 is formed between the housing 100 and the air inlet end 320, an air inlet is formed on the housing 100, the air inlet duct 500 extends in the second direction, one end of the air inlet duct 500 is communicated with the air inlet end 320, and the other end of the air inlet duct 500 is communicated with the air inlet. The air flow can produce once the flow direction when getting into module 300 from air inlet duct 500 and change, has further increased the windage that the air current flows in the battery package, and then makes the air current can fully contact with module 300 in module 300, improves the heat that the unit volume air current carried to the temperature change that the unit energy that makes for cooling battery package consumed can bring more battery packages reaches the purpose that improves the utilization efficiency of battery package forced air cooling to the energy.
Another aspect of the present application provides a power device, which includes the battery pack provided in the embodiment of the present application. The power device in the embodiment of the application is preferably a vehicle, and can also be an aircraft, a ship or other land-based devices.
The power device provided by the application adopts the battery pack provided by the application, the airflow enters the module 300 from the air inlet end 320 of the module 300, the module 300 is cooled, the airflow flows out from the air outlet end 310 and then enters the first air duct portion 400, the flow direction of the airflow changes from the first direction to the second direction, the airflow enters the second air duct portion when flowing to the joint of the first air duct portion 400 and the second air duct portion, the flow direction of the airflow changes from the second direction to the third direction again, then the airflow flows into the third air duct portion and further flows out of the battery pack from the air outlet 110, as the projection of the air outlet 110 is at least partially overlapped with the orthographic projection of the module 300 in the first plane, at least part of the air outlet 110 is positioned between the air inlet end 320 and the air outlet end 310 of the module 300, the flow direction of the airflow which flows out from the air outlet end 310 and sequentially flows in the second direction and the third direction changes again when entering the third air duct portion, that is to say, the air flow direction is changed at least three times after flowing out from the air outlet end 310 of the module 300, which properly increases the wind resistance of the air flow in the battery pack, so that the air flow can fully contact with the module 300 in the module 300, and the heat carried by the air flow per unit volume is increased, so that more temperature changes of the battery pack can be brought to the unit energy consumed for cooling the battery pack, and the purpose of improving the utilization efficiency of the air-cooled cooling of the battery pack on the energy is achieved.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The battery pack is characterized by comprising a shell (100) and a module (300), wherein a module accommodating chamber is formed in the shell (100), the module (300) is installed in the module accommodating chamber, an air outlet is formed in the shell (100), a cooling air duct (330) penetrating through the module (300) in a first direction is formed in the module (300), one end of the module (300) in the first direction is an air inlet end (320), and the other end of the module (300) is an air outlet end (310);
an air outlet duct is formed between the module (300) and the shell (100), the air outlet duct comprises a first air duct portion (400), a second air duct portion and a third air duct portion which are sequentially communicated, the first air duct portion (400) extends in a second direction, the first air duct portion (400) is communicated with the air outlet end (310), the second air duct portion extends in a third direction, the third air duct portion is communicated with the air outlet, and the orthographic projection of the air outlet and the orthographic projection of the module (300) at least partially coincide in a first plane;
the second direction is perpendicular to the first direction, the first direction and the second direction are both perpendicular to the third direction, and the first direction and the second direction are both parallel to the first plane.
2. The battery pack according to claim 1, further comprising an air duct (200), wherein the first air duct portion (400) is located between the housing (100) and the module (300), the air duct (200) is installed between the housing (100) and the module (300), the first air duct portion (400) is communicated with the air outlet through the air duct (200), and the second air duct portion and the third air duct portion are both located in the air duct (200).
3. The battery pack according to claim 2, wherein a sealing strip (600) extending along an edge of the air outlet end (310) is installed between the air outlet end (310) and the case (100), and the first air channel portion (400) is enclosed among the air outlet end (310), the case (100) and the sealing strip (600).
4. The battery pack according to claim 3, wherein the case (100) includes a groove portion having a groove opening provided facing the gas outlet end (310), and the sealing strip (600) extends along an edge of the groove opening.
5. The battery pack according to claim 3, wherein one end of the first air channel portion (400) in the second direction is connected to the air duct (200).
6. The battery pack according to claim 2, wherein the duct (200) includes a first duct portion (210) and a second duct portion (220), the first duct portion (210) extends in the third direction, one end of the second duct portion (220) is connected to the first duct portion (210), the other end of the second duct portion (220) is connected to the air outlet, and the second duct portion (220) extends obliquely away from the module (300) from the first duct portion (210) to the air outlet.
7. The battery pack according to claim 6, wherein the duct (200) further comprises a third duct portion (230), the first duct portion (210), the second duct portion (220), the third duct portion (230), and the air outlet being connected in series, the third duct portion (230) extending in the third direction away from the module (300).
8. The battery pack according to claim 2, wherein a cross-sectional area of the third air channel portion gradually increases in a direction from the first air channel portion (400) to the air outlet.
9. The battery pack according to any one of claims 2 to 8, wherein an intake air duct (500) is formed between the case (100) and the intake end (320), an intake port is formed on the case (100), the intake air duct (500) extends in the second direction, one end of the intake air duct (500) communicates with the intake end (320), and the other end of the intake air duct (500) communicates with the intake port.
10. A power plant, characterized in that it comprises a battery pack according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122355890.6U CN216450712U (en) | 2021-09-27 | 2021-09-27 | Battery pack and power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122355890.6U CN216450712U (en) | 2021-09-27 | 2021-09-27 | Battery pack and power device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216450712U true CN216450712U (en) | 2022-05-06 |
Family
ID=81350632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122355890.6U Active CN216450712U (en) | 2021-09-27 | 2021-09-27 | Battery pack and power device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216450712U (en) |
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2021
- 2021-09-27 CN CN202122355890.6U patent/CN216450712U/en active Active
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