CN116973053A - Air tightness detection mechanism of battery pack of electric vehicle - Google Patents

Air tightness detection mechanism of battery pack of electric vehicle Download PDF

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Publication number
CN116973053A
CN116973053A CN202210433837.XA CN202210433837A CN116973053A CN 116973053 A CN116973053 A CN 116973053A CN 202210433837 A CN202210433837 A CN 202210433837A CN 116973053 A CN116973053 A CN 116973053A
Authority
CN
China
Prior art keywords
battery pack
air
inner sleeve
detection mechanism
tightness detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210433837.XA
Other languages
Chinese (zh)
Inventor
赵晶晶
杨敏
王燕强
赵羿
蔡宇欣
陈文霞
胡士宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSA Automobiles SA
Original Assignee
PSA Automobiles SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Priority to CN202210433837.XA priority Critical patent/CN116973053A/en
Publication of CN116973053A publication Critical patent/CN116973053A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3209—Details, e.g. container closure devices
    • 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

Abstract

The application discloses an air tightness detection mechanism of a battery pack of an electric vehicle. This gas tightness detection mechanism includes: the first end of the outer sleeve is provided with a first end cover, and a first air inlet channel is formed in the first end cover; the second end of the outer sleeve is open; an inner sleeve detachably arranged in the cavity of the outer sleeve, wherein a first end of the inner sleeve faces to the first end of the outer sleeve and is provided with a second end cover, and a second air inlet channel communicated with the first air inlet channel is formed on the second end cover; the second end of the inner sleeve is open. When the battery pack is in use, the second end of the inner sleeve is in butt joint with the discharge valve, the second end of the outer sleeve is in sealing contact with the outer surface of the battery pack, gas is supplied into the battery pack through the first air inlet channel and the second air inlet channel, and the air tightness of the battery pack is determined according to whether the battery pack leaks air or not. Thus, after the air tightness of the battery pack is qualified, the operation of installing a discharge valve, closing a detection hole and the like on the battery pack is not needed, and the air tightness of the battery pack is ensured to be good.

Description

Air tightness detection mechanism of battery pack of electric vehicle
Technical Field
The application relates to the field of new energy vehicles, in particular to an air tightness detection mechanism for detecting a battery pack of an electric vehicle.
Background
With the increasing progress of electric automobile technology, electric automobiles and hybrid electric automobiles are becoming popular. The core of the electric vehicle is a battery pack, which provides power for the electric vehicle, so that the working stability of the electric vehicle is very important. For example, the battery in the battery pack needs to be waterproof, dustproof, etc., which requires the battery pack to have good air tightness. In general, in the preparation of a battery pack, it is necessary to detect the air tightness of the battery pack.
In the related art, in order to detect the air tightness of the battery pack, it is generally necessary to open a detection hole in the case of the battery pack or to detect using a mounting hole of a drain valve. After the air tightness of the battery pack is qualified, the detection hole is closed or the drain valve is mounted on the battery pack, but the air tightness of the battery pack may be damaged when the detection hole is closed or the drain valve is mounted.
Disclosure of Invention
In view of the above technical problems, the present application provides an air tightness detection mechanism for a battery pack of an electric vehicle. This gas tightness detection mechanism includes: the first end of the outer sleeve is provided with a first end cover, and a first air inlet channel is formed in the first end cover; the second end of the outer sleeve is open and adapted to be in sealing contact with the outer surface of the battery pack; the inner sleeve is detachably arranged in the cavity of the outer sleeve, a first end of the inner sleeve faces to the first end of the outer sleeve and is provided with a second end cover, and a second air inlet channel communicated with the first air inlet channel is formed in the second end cover; the second end of the inner sleeve is open and adapted to interface with a drain valve for the battery pack; the air tightness detection mechanism is configured to be in butt joint with the discharge valve at the second end of the inner sleeve in a use state, the second end of the outer sleeve is in sealing contact with the outer surface of the battery pack, air is supplied into the battery pack through the first air inlet channel and the second air inlet channel, and the air tightness of the battery pack is determined according to whether the battery pack leaks air or not.
In one embodiment, a mating hole is configured on one of the first end cap and the second end cap, and a mating post is configured on the other of the first end cap and the second end cap, the mating post being adapted to engage into the mating hole; the first air intake passage is formed in one of the fitting hole and the fitting post, and the second air intake passage is formed in the other of the fitting hole and the fitting post.
In one embodiment, the mating holes and the mating posts are threadably connected.
In one embodiment, an intake nipple is configured on an outer surface of the first end cap, the first intake passage communicating with the intake nipple.
In one embodiment, the discharge valve includes a body mounted on the battery pack and a vent member received in the cavity of the inner sleeve, the vent passage in the vent member communicating with the cavity of the inner sleeve.
In one embodiment, the air permeable member is fixedly connected to the inner sleeve.
In one embodiment, the circumferential side wall of the inner sleeve is provided with a jack, the ventilation piece is provided with a laterally extending plugging channel, and the plugging channel corresponds to the jack; the air tightness detection mechanism further comprises a locking piece, and the locking piece is inserted into the insertion hole and the insertion channel to fixedly connect the air permeable piece with the inner sleeve.
In one embodiment, the number of receptacles is two and is disposed in radial alignment with the inner sleeve; the inserting channel penetrates through the ventilation piece; the locking tab extends through both the receptacle and the mating channel.
In one embodiment, the first intake passage and the second intake passage are aligned.
In one embodiment, a seal is provided on the second end of the outer sleeve such that the second end of the outer sleeve is in sealing contact with the outer surface of the battery pack.
Compared with the prior art, the technical scheme of the application has the following beneficial effects: when the air tightness detection mechanism of the application is used for detecting the air tightness of the battery pack, the exhaust valve is arranged on the battery pack, and the air tightness detection mechanism is connected to the exhaust valve. Thus, after the air tightness of the battery pack is qualified, the operation of installing a discharge valve, closing a detection hole and the like on the battery pack is not needed, and the air tightness of the battery pack is ensured to be good.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 schematically shows an air tightness detection mechanism of a battery pack of an electric vehicle according to an embodiment of the present application.
Fig. 2 is a sectional view schematically showing a state in which the airtightness detection mechanism shown in fig. 1 is abutted against the discharge valve.
Fig. 3 schematically shows a battery pack mounted with a drain valve.
Fig. 4 schematically shows the structure of the outer sleeve.
Fig. 5 is a cross-sectional view of fig. 4.
Fig. 6 schematically shows the structure of the inner sleeve.
Fig. 7 is a cross-sectional view of fig. 6.
Fig. 8 schematically shows the structure of the air permeable member.
Fig. 9 schematically shows a panel of the battery pack for mounting the drain valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Fig. 1 schematically shows an air-tightness detecting mechanism 1 (hereinafter, simply referred to as air-tightness detecting mechanism 1) of a battery pack of an electric vehicle according to an embodiment of the present application. Fig. 2 is a sectional view showing a state in which the airtightness detection mechanism 1 shown in fig. 1 is docked with the discharge valve 31. As shown in fig. 1 and 2, the airtightness detection mechanism 1 includes an outer tube 10 and an inner tube 20. The inner sleeve 20 is detachably provided in the cavity of the outer sleeve 10. Specifically, the outer sleeve 10 is provided at a first end with a first end cap 111, a first air inlet passage 112 is configured in the first end cap 111, and a second end of the outer sleeve 10 is open. The first end of the inner sleeve 20 faces the first end of the outer sleeve 10 and is provided with a second end cap 211, a second air inlet channel 212 communicating with the first air inlet channel 112 is formed on the second end cap 211, and the second end of the inner sleeve 20 is open.
Fig. 3 schematically shows a battery pack 30 mounted with a drain valve 31. When the air pressure in the battery pack 30 is greater than the external ambient air pressure, the discharge valve 31 can discharge the air in the battery pack 30 to prevent the explosion of the battery pack 30; when the air pressure in the battery pack 30 is smaller than the air pressure of the external environment, the exhaust valve 31 may allow the air in the external environment to enter the battery pack 30, so as to avoid the battery pack 30 from operating under the pressurized condition (e.g., under the air pressure of the external environment), thereby causing malfunction. The specific structure of the discharge valve 31 is well known to those skilled in the art, and will not be described here.
When the air tightness of the battery pack 30 is detected using the air tightness detecting mechanism 1, the second end of the outer sleeve 10 is brought into sealing contact with the outer surface of the battery pack 30; the second end of the inner sleeve 20 interfaces with a drain valve 31 on the battery pack 30. Then, the gas is introduced into the battery pack 30 through the first gas inlet passage 112 and the second gas inlet passage 212. The air tightness of the battery pack 30 is determined according to whether the battery pack 30 leaks air.
When the air tightness of the battery pack 30 is detected using the air tightness detecting mechanism 1 of the present application, the air release valve 31 is mounted on the battery pack 30, and the air tightness detecting mechanism 1 is coupled to the air release valve 31; and the battery pack 30 is inflated by utilizing the characteristic that the discharge valve 31 allows external air to enter the battery pack 30. Compared with the prior art, the battery pack 30 does not need to be provided with a detection hole, so that the battery pack 30 is prevented from being additionally damaged, and the air tightness detection of the battery pack 30 is greatly facilitated. Moreover, after the air tightness of the battery pack 30 is qualified, the operation of closing the detection hole or installing the discharge valve and the like on the battery pack 30 is not required in the prior art, and the potential damage of the operation to the battery pack 30 is avoided, thereby ensuring that the air tightness of the battery pack 30 is good.
As also shown in fig. 2, the first and second intake passages 112, 212 are aligned. In this way, the airflow path may be shortened, reducing air lock, facilitating rapid inflation of the battery pack 30.
In one embodiment, a mating hole 113 is configured on one of the first end cap 111 and the second end cap 211, and a mating post 213 is configured on the other of the first end cap 111 and the second end cap 211. The mating posts 213 are adapted to engage into the mating holes 113 to fit the inner sleeve 20 into the cavity of the outer sleeve 10. Specifically, as shown in fig. 2, 4 to 6, the fitting hole 113 is configured on the first end cap 111, and the orifice of the fitting hole 113 is opened on the inner side surface of the first end cap 111 (i.e., on the side surface within the chamber of the first end cap 111). Accordingly, mating posts 213 are configured on the second end cap 211 and extend from an outer surface of the second end cap 211 away from the second end cap 211. In this case, the fitting hole 113 forms the first air intake passage 112, and the second air intake passage 212 is formed in the fitting post 213. According to this structure, after the inner sleeve 20 is disposed in the chamber of the outer sleeve 10, the fitting posts 213 are engaged with the fitting holes 113, which limits the inner sleeve 20, prevents the inner sleeve 20 from moving relative to the outer sleeve 10, and ensures that the first air intake passage 112 and the second air intake passage 212 communicate with each other to smoothly inflate the battery pack 30.
It should be appreciated that the mating posts 213 may also be formed on the first end cap 111; accordingly, the fitting hole 113 is formed on the second end cap 211, which will not be described again. For simplicity, the description will be given below taking an example in which the fitting hole 113 is formed on the first end cap 111 and the fitting post 213 is formed on the second end cap 211.
Optionally, the mating hole 113 and the mating post 213 are threadably coupled. In this way, the outer sleeve 10 can be screwed relative to the inner sleeve 20 to stably fit the inner sleeve 20 into the cavity of the outer sleeve 10, simplifying the assembly operation and ensuring that the first and second intake passages 112 and 212 communicate with each other. It should be appreciated that the mating holes 113 and the mating posts 213 may also be joined together by other means, such as bonding.
Alternatively, the mating holes 113 and the mating posts 213 may have various shapes, for example, may be generally cylindrical as disclosed in fig. 4-6, may be prismatic, tapered, etc., and will not be described again.
Optionally, a pattern is configured on the outer surface of the circumferential side wall of the outer sleeve 10. In this way, friction may be increased when manipulating the outer sleeve 10 (e.g., screwing the outer sleeve 10), facilitating the application of force by an operator to quickly assemble the outer sleeve 10 with the inner sleeve 20.
Optionally, an intake nipple 114 is configured on an outer surface of the first end cap 111, and the first intake passage 112 communicates with the intake nipple 114. In the air tightness test of the battery pack 30, the air inlet connection 114 is connected to an external air source, for example, an air pump through a hose, to supply air to the battery pack 30.
Optionally, a circumferentially extending rib 115 is configured on the outer wall of the intake nipple 114. Rib 115 may increase the stability of the connection of intake nipple 114 to an external gas source (e.g., a hose) to facilitate the filling of battery pack 30 with gas via gas tightness detection mechanism 1.
As also shown in fig. 2 and 3, the discharge valve 31 includes a body 32 and a ventilation member 33 connected to the body 32. The body 32 is mounted on the battery pack 30; the air permeable member 33 is accommodated in the cavity of the inner sleeve 20. The ventilation channels 34 on the ventilation member 33 communicate with the cavity of the inner sleeve 20. In this structure, as long as the size of the air permeable member 33 is smaller than the size of the cavity of the inner sleeve 20, the air permeable member 33 can be accommodated in the inner sleeve 20, irrespective of whether the shape of the air permeable member 33 coincides with the shape of the cavity of the inner sleeve 20, which greatly facilitates the use of the air tightness detection mechanism 1 with various types of discharge valves 31, as long as the air permeable member 33 of the discharge valve 31 can be accommodated in the cavity of the inner sleeve 20. It should be appreciated that the ventilation channel 34 of the ventilation member 33 communicates with the interior of the battery pack 30 so as to facilitate the flow of the gas within the battery pack 30 to the external environment or the flow of the gas within the external environment into the battery pack 30 (as described above), as is well known to those skilled in the art and will not be described in detail herein.
Alternatively, as shown in fig. 3, the air permeable member 33 of the discharge valve 31 protrudes to the outside of the battery pack 30. This facilitates the butt-mounting of the inner sleeve 20 with the air permeable member 33, simplifying the mounting of the air tightness detection mechanism 1.
Fig. 9 schematically shows a panel 36 of the battery pack 30 for mounting the discharge valve 31. As shown in fig. 9, a spline hole 37 is formed in the panel 36. The body 32 of the discharge valve 31 has a spline structure that mates with the spline hole 37. In this way, after the main body 32 is inserted into the splined hole 37, the main body 32 (or the discharge valve 31) is rotated by a certain angle relative to the splined hole 37, so that the discharge valve 31 can be fixedly mounted on the battery pack 30, the mounting process is very simple, and the operation of an operator is facilitated.
Optionally, the air permeable member 33 is fixedly connected to the inner sleeve 20. With this structure, the inner tube 20 cannot rotate relative to the battery pack 30. In this way, an operator can conveniently align and assemble the mating holes 113 on the outer sleeve 10 with the mating posts 213 on the inner sleeve 20. For the threaded engagement holes 113 and engagement posts 213, the fixed inner sleeve 20 may facilitate an operator threading the outer sleeve 10 to assemble the inner sleeve 20 with the outer sleeve 10.
Alternatively, as shown in fig. 2, 6, 7 and 8, a receptacle 21 is formed on the circumferential side wall of the inner sleeve 20, and a laterally extending insertion passage 35 is formed on the air permeable member 33, the insertion passage 35 corresponding to the receptacle 21. In addition, the air tightness detection mechanism 1 further includes a locking piece 22. The locking piece 22 is inserted into the insertion hole 21 and the insertion passage 35 to fixedly connect the air permeable member 33 with the inner sleeve 20. With this structure, after the locking piece 22 is inserted into the insertion hole 21 and the insertion passage 35, the inner sleeve 20 and the air permeable member 33 are fixedly connected together; after the locking tab 22 is removed from the receptacle 21 and the mating channel 35, the inner sleeve 20 is separated from the air permeable member 33. Thereby, the operator can easily install the air tightness detecting mechanism 1 on the battery pack 30 or remove it from the battery pack 30.
In a specific embodiment, the number of receptacles 21 is two and is aligned in the radial direction of the inner sleeve 20; the plug channels 35 extend transversely (i.e. radially in the same direction as the inner sleeve 20) through the air-permeable member 33; the locking tabs 22 extend through the two receptacles 21 and the mating channels 35. In this way, the forces of the inner sleeve 20 and the air permeable member 33 are more balanced, so that the connection of the inner sleeve 20 and the air permeable member 33 is more stable.
Optionally, the structure of the plugging channel 35 is identical to and intersects with the structure of the ventilation channel 34, so that gas can also enter the battery pack 30 along the plugging channel 35, which helps to increase the inflation speed of the battery pack 30, and thus the air tightness detection speed of the battery pack 30.
As further shown in fig. 2, a seal 121 is provided on the second end of the outer sleeve 10 to provide sealing contact of the second end of the outer sleeve 10 with the outer surface of the battery pack 30. Optionally, an annular groove 122 is formed on the mating surface of the second end of the outer sleeve 10; the seal 121 is a sealing ring mounted in the annular groove 122.
The method of using the air tightness detecting mechanism 1 will be described below by taking the battery pack 30 pre-mounted with the drain valve 31 as an example.
First, the inner sleeve 20 is fitted over the air permeable member 33 of the discharge valve 31 (i.e., the air permeable member 33 is received into the cavity of the inner sleeve 20), and the insertion holes 21 on the side wall of the inner sleeve 20 are aligned with the insertion channels 35 on the air permeable member 33.
The locking tab 22 is then inserted into the receptacle 21 and the mating channel 35 to secure the inner sleeve 20 and the air permeable member 33 together.
The mating holes 113 on the outer sleeve 10 are then aligned with the mating posts 213 on the inner sleeve 20. The outer casing 10 is screwed until the outer casing 10 is in sealing contact with the outer surface of the battery pack 30, at which time the inner casing 20 and the outer casing 10 are also assembled together.
Next, an external gas source is connected to the gas inlet nipple 114 on the outer sleeve 10 to supply gas into the battery pack 30. The air tightness of the battery pack 30 is determined according to whether the battery pack 30 leaks air. In one embodiment, the pressure is maintained for 60 seconds with a test air pressure of 4KPa in the battery pack 30. The air pressure value inside the battery pack 30 was measured using an air tightness tester. Considering the reasons of test errors and the like, if the pressure drop in the battery pack 30 is less than 45Pa, the air tightness of the battery pack 30 is considered to be qualified; if the pressure drop is greater than or equal to 45Pa, the air tightness of the battery pack 30 is considered to be unacceptable.
It should be understood that the above-described air tightness detection mechanism 1 may also be used to detect the air tightness of an accessory system (e.g., a cooling system) of the battery pack 30. In addition, for these auxiliary systems, those skilled in the art may select appropriate detected air pressure, dwell time and pressure drop values according to the actual situation, and will not be described herein.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims (10)

1. An air tightness detection mechanism of a battery pack of an electric vehicle, comprising:
the air inlet device comprises an outer sleeve (10), wherein a first end cover (111) is arranged at the first end of the outer sleeve (10), and a first air inlet channel (112) is formed in the first end cover (111); the second end of the outer sleeve (10) is open and adapted to be in sealing contact with the outer surface of the battery pack (30);
an inner sleeve (20), wherein the inner sleeve (20) is detachably arranged in a cavity of the outer sleeve (10), a first end of the inner sleeve (20) faces to a first end of the outer sleeve (10) and is provided with a second end cover (211), and a second air inlet channel (212) communicated with the first air inlet channel (112) is formed on the second end cover (211); the second end of the inner sleeve (20) is open and adapted to interface with a drain valve (31) for the battery pack (30);
the air tightness detection mechanism is configured such that in a use state, the second end of the inner sleeve (20) is in butt joint with the discharge valve (31), the second end of the outer sleeve (10) is in sealing contact with the outer surface of the battery pack (30), air is supplied into the battery pack (30) through the first air inlet channel (112) and the second air inlet channel (212), and the air tightness of the battery pack (30) is determined according to whether the battery pack (30) leaks or not.
2. The tightness detection mechanism according to claim 1, wherein a mating hole (113) is configured on one of the first end cap (111) and the second end cap (211), and a mating post (213) is configured on the other of the first end cap (111) and the second end cap (211), the mating post (213) being adapted to engage into the mating hole (113);
the first air intake passage (112) is formed in one of the fitting hole (113) and the fitting post (213), and the second air intake passage (212) is formed in the other of the fitting hole (113) and the fitting post (213).
3. The tightness detection mechanism according to claim 2, wherein the mating hole (113) and the mating post (213) are screwed.
4. A gas tightness detection mechanism according to any of claims 1 to 3, wherein an inlet nipple (114) is configured on an outer surface of the first end cap (111), the first inlet channel (112) being in communication with the inlet nipple (114).
5. The tightness detection mechanism according to claim 1, wherein the discharge valve (31) comprises a body (32) and a venting member (33), the body (32) being adapted to be mounted on the battery pack (30), the venting member (33) being housed within the cavity of the inner sleeve (20), a venting channel (34) on the venting member (33) being in communication with the cavity of the inner sleeve (20).
6. The tightness detection mechanism according to claim 5, wherein the gas permeable member (33) is fixedly connected to the inner sleeve (20).
7. The tightness detection mechanism according to claim 6, wherein a receptacle (21) is configured on a circumferential side wall of the inner sleeve (20), and a laterally extending plug-in channel (35) is configured on the air-permeable member (33), the plug-in channel (35) corresponding to the receptacle (21);
the air tightness detection mechanism further comprises a locking piece (22), and the locking piece (22) is inserted into the insertion hole (21) and the insertion channel (35) so as to fixedly connect the air permeable piece (33) with the inner sleeve (20).
8. The tightness detection mechanism according to claim 7, wherein the number of the insertion holes (21) is two and is arranged diametrically opposite to the inner sleeve (20); the insertion channel (35) penetrates through the ventilation piece (33); the locking tabs (22) extend through both the receptacles (21) and the insertion channels (35).
9. The air tightness detection mechanism according to claim 1, wherein the first air intake channel (112) and the second air intake channel (212) are aligned.
10. The tightness detection mechanism according to claim 1, wherein a seal (121) is provided on the second end of the outer sleeve (10) to bring the second end of the outer sleeve (10) into sealing contact with the outer surface of the battery pack (30).
CN202210433837.XA 2022-04-24 2022-04-24 Air tightness detection mechanism of battery pack of electric vehicle Pending CN116973053A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210433837.XA CN116973053A (en) 2022-04-24 2022-04-24 Air tightness detection mechanism of battery pack of electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210433837.XA CN116973053A (en) 2022-04-24 2022-04-24 Air tightness detection mechanism of battery pack of electric vehicle

Publications (1)

Publication Number Publication Date
CN116973053A true CN116973053A (en) 2023-10-31

Family

ID=88477231

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210433837.XA Pending CN116973053A (en) 2022-04-24 2022-04-24 Air tightness detection mechanism of battery pack of electric vehicle

Country Status (1)

Country Link
CN (1) CN116973053A (en)

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