CN219106442U - Battery exhaust apparatus, battery pack and power consumption device - Google Patents

Abstract

The embodiment of the application provides a battery exhaust device, a battery pack and an electricity utilization device. The battery exhaust apparatus includes: the smoke filter comprises a filter body and a filter assembly, the filter body comprises an air inlet end and an air outlet end, the filter assembly is arranged in the filter body and positioned between the air inlet end and the air outlet end, and the air inlet end is used for being communicated with an air outlet of the battery; the exhaust valve body is arranged at the air outlet end of the filter body. The battery exhaust apparatus of this application embodiment can effectively cool down, filter, fire-retardant to the flue gas that battery thermal runaway produced, synthesizes the security when promoting battery thermal runaway.

Description

Battery exhaust apparatus, battery pack and power consumption device

Technical Field

The application relates to the technical field of power supplies, in particular to a battery exhaust device, a battery pack and an electric device.

Background

At present, in order to prevent explosion when the battery in the battery pack is out of control, an explosion-proof valve or an air-permeable valve is arranged on the power supply shell and used for keeping the balance of the air pressure inside and outside the battery pack in the normal power supply process of the power supply, and quick pressure relief and smoke discharge occur under the condition of the battery out of control.

However, under thermal runaway of the battery, a large amount of combustible materials are contained in the flue gas exhausted from the explosion-proof valve or the ventilation valve, the combustible materials are easy to ignite, so that a fire disaster occurs, and the flue gas generated by combustion of a large amount of combustible materials is inhaled into a human body, so that poisoning is caused, and the potential health hazard is caused.

Disclosure of Invention

An object of the embodiment of the application is to provide a battery exhaust device, a battery pack and an electricity utilization device to solve the problem that the thermal runaway flue gas of battery escapes and causes the potential safety hazard.

The embodiment of the application provides a battery exhaust device, which comprises: the flue gas filter comprises a filter body and a filter assembly, wherein the filter body comprises an air inlet end and an air outlet end, the filter assembly is arranged in the filter body and is positioned between the air inlet end and the air outlet end, and the air inlet end is used for being communicated with a battery air outlet; and the exhaust valve body is arranged at the air outlet end of the filter body.

Above-mentioned embodiment, when battery thermal runaway, the inside flue gas that produces of battery enters into the filter body through the battery gas vent, fully contacts with the inside filter component of filter body to filter component carries out effective filtration to particulate matter and harmful substance in the flue gas, and the flue gas after the filtration is discharged from the discharge valve body valve opening of setting at the filter body gas outlet end. In addition, because the flue gas temperature that battery thermal runaway produced is higher, when carrying out contact filtration with filter unit, filter unit and filter body can also cool down to the flue gas, can also reduce the temperature of flue gas when effectively purifying the flue gas, and then promotes the security when battery thermal runaway.

In some embodiments, the filter assembly comprises a first filter screen, a smoke filter filler, and a second filter screen disposed in sequence from the inlet end to the outlet end of the filter body.

According to the embodiment, when the battery is out of control, smoke generated in the battery enters the filter body through the battery exhaust port, large particulate matters in the smoke are filtered through the first filter screen in the filter body, fine particulate matters and harmful matters in the purified smoke are filtered through the smoke filtering filler, and the smoke is filtered once through the second filter screen again, so that the smoke can be fully filtered through three layers of filtering, most of particulate matters and harmful matters in the smoke are filtered, and the purification is more thorough. In addition, because the flue gas temperature that battery thermal runaway produced is higher, the flue gas has passed through three-layer filter element (first filter screen, flue gas filtration filler and second filter screen promptly), and cooling efficiency further promotes, can also further reduce the temperature of flue gas when effectively purifying the flue gas, and then promotes the security when battery thermal runaway.

In some embodiments, the first filter screen, the smoke filter filler, and the second filter screen are of a split structure and the first filter screen, the smoke filter filler, and the second filter screen are arranged at intervals.

Above-mentioned embodiment, first filter screen, flue gas filtration filler and the second filter screen of interval arrangement have prolonged the flow path of flue gas when battery thermal runaway for the flue gas is slow and abundant respectively with first filter screen, flue gas filtration filler and second filter screen contact filtration, flue gas filtration is more thorough, and the cooling effect also obviously obtains promoting.

In some embodiments, the inner peripheral wall of the filter body is formed with a first step structure, a second step structure and a containing groove between the first step structure and the second step structure, the first filter screen is adhered or pressed and fixed on the first step structure, the second filter screen is adhered or pressed and fixed on the second step structure, and the flue gas filtering filler is filled in the containing groove.

Above-mentioned embodiment, first step structure, second step structure and holding tank are fixed to first filter screen, flue gas filtration filler and second filter screen formation effectual support respectively to can fully with the filter body internal perisporium fully contact seal, promote the reliability to flue gas filtration.

In some embodiments, the filter body includes a first body portion and a second body portion threadedly connected to the first body portion, the first step structure and the receiving groove are disposed at an inner peripheral wall of the first body portion, and the second step structure is disposed at an inner peripheral wall of the second body portion.

According to the embodiment, when the first body part is in threaded connection with the first body part, the second filter screen is pressed and fixed on the second step structure of the inner peripheral wall of the second body part, so that the filter screen is convenient to install.

In some embodiments, the first filter screen, the smoke filtering filler and the second filter screen are of an integral structure, wherein the first filter screen is connected with the second filter screen to form a containing cavity, and the smoke filtering filler is filled in the containing cavity.

Above-mentioned embodiment, first filter screen, flue gas filtration filler and second filter screen form into an organic whole structure for filter assembly modularization, the installation of being convenient for promotes assembly efficiency.

In some embodiments, the first filter screen is a multilayer waterproof breathable film or a metal filter screen; and/or, the second filter screen is a multi-layer waterproof breathable film or a metal filter screen.

Above-mentioned embodiment, multilayer waterproof ventilated membrane prevents that liquid from permeating to the inside battery and influencing the battery performance, and metal filter screen can also play the effect of cooling when carrying out effective filtration to the flue gas to have the fire resistance.

In some embodiments, the smoke filter pack is any one or more of the following: activated carbon, vesuvianite, temperature-resistant foam and foam metal.

According to the embodiment, the fillers not only play a role in filtering and purifying the smoke, but also have a certain flame retardance, so that the safety of the battery in thermal runaway is improved.

In some embodiments, the air inlet end of the filter body is provided with external threads for threaded connection with a battery air outlet; the air outlet end of the filter body is provided with an internal thread for being in threaded connection with the air outlet valve body.

Above-mentioned embodiment is through the external screw thread and the battery gas vent threaded connection of entrance point to and the internal screw thread and the discharge valve body threaded connection of giving vent to anger the end, need not change original battery and discharge valve body structure, goes through filter body entrance point and the end of giving vent to anger and adapts the installation of battery gas vent and discharge valve body, reduces processing technology, reduces processing cost, and the installation is also more convenient.

The embodiment of the application also provides a battery pack, which comprises: the battery pack comprises a shell and a plurality of battery units arranged in the shell, wherein the shell is provided with an exhaust port; and a battery exhaust apparatus as in any one of the embodiments above, wherein an air inlet end of the filter body of the battery exhaust apparatus communicates with the air outlet.

Above-mentioned embodiment, battery package is through the configuration this application battery exhaust apparatus that embodiment provided above, when battery thermal runaway, can effectively cool down and filter the flue gas that thermal runaway produced to play fire-retardant effect, promote the security of battery thermal runaway.

The embodiment of the application also provides an electric device, which comprises: a vehicle body; and the battery pack is arranged with the vehicle body.

Above-mentioned embodiment, power consumption device is through the battery package of configuration this application embodiment, under the battery cell thermal runaway condition of battery package, can carry out effective cooling and filtration to the flue gas that battery thermal runaway produced to filter most combustible particles, prevent the battery package burning, through the security performance to the comprehensive promotion power consumption device of cooling, filtration, fire-retardant of flue gas, effectively protected the physical and mental health such as crew.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a battery exhaust apparatus according to an embodiment of the present application;

FIG. 2 is a perspective view of a battery exhaust apparatus provided in an embodiment of the present application;

fig. 3 is a cross-sectional view of a battery exhaust apparatus provided in an embodiment of the present application.

Icon: 10-a flue gas filter; 11-external threads; 12-internal threads; 13-a first filter screen; 14-a flue gas filtration packing; 15-a second filter screen; an intake end 101; an outlet end 102; 20-an exhaust valve body.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

Fig. 1 is a perspective view of a battery exhaust apparatus provided in an embodiment of the present application; FIG. 2 is a perspective view of a battery vent provided in an embodiment of the present application; fig. 3 is a cross-sectional view of a battery exhaust apparatus provided in an embodiment of the present application.

Referring to fig. 1-3, an embodiment of the present application provides a battery exhaust apparatus, including: a smoke filter 10 and an exhaust valve body 20.

The smoke filter 10 is used for filtering smoke generated by thermal runaway of a battery, the smoke filter 10 comprises a filter body and a filter assembly, the filter body is provided with an air inlet end 101 and an air outlet end 102, the air inlet end 101 is used for communicating with an air outlet of the battery, and the air outlet end 102 is used for communicating with an air outlet hole of the air outlet valve body 20. The filter assembly is disposed within the filter body between the inlet end 101 and the outlet end 102. The exhaust valve body 20 is disposed at the outlet end 102 of the filter body.

When the battery thermal runaway, the inside flue gas that produces of battery is in the filter body through the battery gas vent, fully contacts with the inside filter component of filter body to filter component carries out effective filtration to particulate matter and the harmful substance in the flue gas, and the flue gas after the filtration is discharged from the discharge valve hole of the discharge valve body 20 that sets up at filter body gas outlet end 102. In addition, because the flue gas temperature that battery thermal runaway produced is higher, when carrying out contact filtration with filter component, filter component can also cool down to the flue gas, and the flue gas after first cooling down and filtering is discharged from the exhaust hole of discharge valve body 20 again, can also reduce the temperature of flue gas when effectively purifying the flue gas, and then promotes the security when battery thermal runaway, has also effectively protected such as crewmember's physical and mental health.

In one example, the filter body may be generally hollow cylindrical with a hollow interior cavity that communicates with the inlet end 101 and the outlet end 102 so that the flue gas can pass through the interior cavity. Optionally, the material of the filter body may be any one of aluminum alloy, resin, stainless steel and carbon fiber.

In some embodiments, referring to fig. 2, the inlet end 101 of the filter body has external threads 11 for threaded connection with a battery vent (not shown). The external threads of the inlet end 101 are adapted to the internal threads of the battery vent. The outlet end 102 of the filter body has internal threads 12 for threaded connection with the vent valve body 20. The internal threads 12 of the outlet end 102 mate with the external threads of the outlet valve body 20.

During installation, the external thread 11 of the inlet end 101 of the filter body can be screwed into the internal thread of the battery exhaust port, and then the exhaust valve body 20 can be screwed into the internal thread 12 of the outlet end 101 of the filter body.

According to the battery exhaust device, the external thread 11 of the inlet end 101 is in threaded connection with the battery exhaust port, the internal thread 12 of the outlet end 102 is in threaded connection with the exhaust valve body 20, the original battery and exhaust valve body structure does not need to be changed, the filter body inlet end 101 and the outlet end 102 are used for adapting to the installation of the battery exhaust port and the exhaust valve body, less processing technology is adopted, processing cost is reduced, and the installation is more convenient.

In some embodiments, referring to fig. 1-3, the filter assembly includes a first filter screen 13, a smoke filter filler 14, and a second filter screen 15 disposed in sequence from an inlet end 101 to an outlet end 102 of the filter body.

When the battery thermal runaway, the inside flue gas that produces of battery enters into the filter body through the battery gas vent, filters the big particulate matter in the flue gas through the inside first filter screen 13 of filter body at first, filters tiny particulate matter and purifies the harmful substance in the flue gas through flue gas filtration filler 14 again, later carries out once more and filters through second filter screen 15, makes the flue gas can fully contact the filtration through three-layer filtration from this to filter most particulate matter and harmful substance in the flue gas, purify more thoroughly. In addition, because the flue gas temperature that battery thermal runaway produced is higher, the flue gas has passed through three-layer filter element (first filter screen 13, flue gas filtration filler 14 and second filter screen 15 promptly), and cooling efficiency also further promotes, can also further reduce the temperature of flue gas when effectively purifying the flue gas, and then promotes the security when battery thermal runaway.

Further alternatively, the filter holes of the second filter mesh 15 are smaller than the filter holes of the first filter mesh 13. So that the flue gas is further filtered of fine particulate matter as it passes through the second filter screen 15.

In one example, the first filter 13 may be a multi-layer waterproof breathable film or a metal filter; and/or the second filter 15 may be a multi-layer waterproof breathable film or a metal filter. For example, the multilayer waterproof breathable membrane may be an ePTFE breathable membrane. The metal filter screen can be an aluminum alloy screen, a stainless steel screen and the like.

The multi-layer waterproof and breathable film prevents liquid from penetrating to affect the performance of the battery. The metal filter screen can effectively cool down the flue gas, and can play a flame-retardant effect.

In one example, the smoke filter filler may be any one or more of the following: activated carbon, vesuvianite, temperature-resistant foam and foam metal.

The fillers not only play a role in filtering and purifying the smoke, but also have certain flame retardance, and improve the safety of the battery in thermal runaway.

In some embodiments, the first filter 13, the smoke filter 14 and the second filter 15 are separate structures, and the first filter 13, the smoke filter 14 and the second filter 15 are spaced apart. The first filter screen 13, the smoke filter filler 14 and the second filter screen 15 are arranged at intervals, and have a certain interval in the length direction of the filter body.

Such an embodiment prolongs the flow path of the flue gas when the battery is out of control, so that the flue gas is slowly and sufficiently filtered by contacting with the first filter screen 13, the flue gas filtering filler 14 and the second filter screen 15 respectively, the flue gas filtering is more thorough, and the cooling effect is obviously improved.

Further alternatively, the inner peripheral wall of the filter body is formed with a first step structure, a second step structure and a containing groove between the first step structure and the second step structure, the first filter screen 13 is adhered or pressed and fixed on the first step structure, the second filter screen 15 is adhered or pressed and fixed on the second step structure, and the flue gas filtering filler 14 is filled in the containing groove. From the air inlet end 101 to the air outlet end 102 of the filter body, the length direction of the filter body is also adopted, the inner peripheral wall of the filter body is sequentially provided with an annular first step structure, an annular accommodating groove and an annular second step structure, the first filter screen 13 is stuck or pressed and fixed on the annular step surface of the annular first step structure, the smoke filtering filler 14 is filled in the annular accommodating groove, and the second filter screen 15 is stuck or pressed and fixed on the annular step surface of the annular second step structure.

In this embodiment of the application, first step structure, second step structure and annular holding tank form effectual support respectively to first filter screen 13, flue gas filtration filler 14 and second filter screen 15 fixedly to can fully contact sealedly with this internal perisporium of filter fully, promote the reliability to flue gas filtration.

In some embodiments, the filter body includes a first body portion 16 and a second body portion 17 threadedly coupled to the first body portion 16, the first step structure and the receiving groove are provided in an inner circumferential wall of the first body portion 16, and the second step structure is provided in an inner circumferential wall of the second body portion 17. The external thread 11 of the inlet end 101 is arranged at the bottom of the first body portion 16, the internal thread 12 of the outlet end 102 is arranged at the top of the second body portion 17, and the exhaust valve body 20 is connected with the internal thread 12 of the outlet end 102 at the top of the second body portion.

In the above embodiment, when the first body portion 16 is screwed with the first body portion 16, the second filter screen 15 is pressed and fixed on the second step structure of the inner peripheral wall of the second body portion 17, so as to facilitate the installation of the filter screen.

In the above embodiments, when the parts are screwed together, a sealing member may be provided between the parts to make the fitting connection airtight.

In some embodiments, the first filter 13, the smoke filtering filler 14 and the second filter 15 are integrally formed, wherein the first filter 13 and the second filter 15 are connected to form a containing cavity, and the smoke filtering filler 14 is filled in the containing cavity. By way of example, the first filter 13 may have a hollow cylindrical structure and a wall surface is formed into a hollow structure so as to filter large particulate matters in the flue gas, the first filter 13 has an opening for filling the filter, the flue gas filter 14 is filled in a containing cavity formed by the first filter 13 in a hollow cylindrical shape from the opening, the flue gas filter 14 can filter fine particulates and harmful matters in the flue gas, and the second filter 15 can be fastened at the opening of the first filter 13.

In this embodiment, first filter screen 13, flue gas filtration packing 14 and second filter screen 15 form into an organic whole structure for filter assembly modularization, the installation of being convenient for promotes assembly efficiency.

The embodiment of the application also provides a battery pack, which comprises: the battery pack comprises a shell, a plurality of battery units arranged in the shell and a battery exhaust device. The housing is provided with an exhaust port. The battery vent is a battery vent as described in any of the above embodiments, wherein the air inlet end 101 of the filter body of the battery vent communicates with the air outlet. For example, the inlet end 101 of the filter body may be threadably coupled to the housing outlet.

The battery pack of this application embodiment is through the configuration this application battery exhaust apparatus that embodiment provided above, when battery thermal runaway, the inside flue gas that produces of battery enters into the filter body through the battery gas vent, fully contacts with the inside filter component of filter body to filter component carries out effective filtration to particulate matter and harmful substance in the flue gas, and the flue gas after the filtration is discharged from the discharge valve hole of the discharge valve body 20 that sets up at filter body gas outlet 102. In addition, because the flue gas temperature that battery thermal runaway produced is higher, when carrying out contact filtration with filter component, filter component can also cool down to the flue gas, and the flue gas after first cooling down and filtering is discharged from the exhaust hole of discharge valve body 20 again, can also reduce the temperature of flue gas when effectively purifying the flue gas, and then promotes the security when battery thermal runaway, has also effectively protected such as crewmember's physical and mental health.

The battery pack can be suitable for an outdoor mobile power source, a household energy storage device or a new energy power utilization device.

The embodiment of the application also provides an electric device, which comprises: the battery pack is arranged with the vehicle body. The battery pack is used as a power battery of the power utilization device and provides a power source for the power utilization device. The electric device can be an automobile, a ship and the like.

The power consumption device of this application embodiment is through the battery package of configuration this application embodiment, under the battery cell thermal runaway condition of battery package, can carry out effective cooling and filtration to the flue gas that battery thermal runaway produced to filter most combustible particles, prevent the battery package burning, through the security performance to the cooling, filtration, fire-retardant comprehensive promotion power consumption device of flue gas, effectively protected such as crewmember's physical and mental health.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners as well. The apparatus embodiments described above are merely illustrative, for example, flow diagrams and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

In addition, the functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.

The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims (11)

1. A battery vent apparatus, comprising:

the flue gas filter comprises a filter body and a filter assembly, wherein the filter body comprises an air inlet end and an air outlet end, the filter assembly is arranged in the filter body and is positioned between the air inlet end and the air outlet end, and the air inlet end is used for being communicated with a battery air outlet; a kind of electronic device with high-pressure air-conditioning system

The exhaust valve body is arranged at the air outlet end of the filter body.

2. The battery vent apparatus of claim 1 wherein,

the filter assembly comprises a first filter screen, a smoke filtering filler and a second filter screen which are sequentially arranged from the air inlet end to the air outlet end of the filter body.

3. The battery vent apparatus of claim 2 wherein,

the first filter screen, the flue gas filtering filler and the second filter screen are arranged in a split mode, and the first filter screen, the flue gas filtering filler and the second filter screen are arranged at intervals.

4. The battery vent apparatus of claim 3 wherein,

the filter is characterized in that a first step structure, a second step structure and a containing groove positioned between the first step structure and the second step structure are formed in the inner peripheral wall of the filter body, the first filter screen is stuck or pressed and fixed to the first step structure, the second filter screen is stuck or pressed and fixed to the second step structure, and the smoke filtering filler is filled in the containing groove.

5. The battery vent apparatus of claim 4 wherein,

the filter body comprises a first body part and a second body part in threaded connection with the first body part, the first step structure and the containing groove are arranged on the inner peripheral wall of the first body part, and the second step structure is arranged on the inner peripheral wall of the second body part.

6. The battery vent apparatus of claim 2 wherein,

the first filter screen, the flue gas filtering filler and the second filter screen are of an integrated structure, wherein the first filter screen is connected with the second filter screen to form a containing cavity, and the flue gas filtering filler is filled in the containing cavity.

7. The battery vent apparatus of any one of claims 2-6 wherein,

the first filter screen is a multi-layer waterproof breathable film or a metal filter screen; and/or the number of the groups of groups,

the second filter screen is a multi-layer waterproof breathable film or a metal filter screen.

8. The battery vent apparatus of any one of claims 2-6 wherein,

the flue gas filtering filler is any one or more of the following: activated carbon, vesuvianite, temperature-resistant foam and foam metal.

9. The battery vent apparatus of any one of claims 1-6, wherein,

the air inlet end of the filter body is provided with external threads and is used for being in threaded connection with the battery air outlet; the air outlet end of the filter body is provided with an internal thread for being in threaded connection with the air outlet valve body.

10. A battery pack, comprising:

the battery pack comprises a shell and a plurality of battery units arranged in the shell, wherein the shell is provided with an exhaust port; a kind of electronic device with high-pressure air-conditioning system

The battery vent of any one of claims 1-9, an air inlet end of the filter body of the battery vent being in communication with the air outlet.

11. An electrical device, comprising:

the battery pack of claim 10.

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