Pure electric vehicle power battery detection equipment

Abstract

The invention specifically relates to a pure electric vehicle power battery detection device, and belongs to the technical field of battery detection. The pure electric vehicle power battery detection equipment comprises a seat body, a rotating disc, a vacuum assembly and a containing assembly. The rotating disc is rotationally connected to the base, the rotating axis of the rotating disc is parallel to the horizontal direction, and a plurality of mounting holes are formed in the rotating disc in the circumferential direction of the rotating disc. The vacuum assembly is arranged on the seat body, and the vacuum assembly is selectively arranged opposite to one of the mounting holes. The accommodating assembly is arranged in the mounting hole, the accommodating assembly is used for accommodating the power battery, and the accommodating assembly is matched with the vacuum assembly, so that the power battery is in a negative pressure environment. When the turntable rotates, the mounting holes opposite to the vacuum assembly can be switched, so that the different accommodating assemblies can be arranged opposite to the vacuum assembly, and compared with a traditional assembly line detection mode through a conveying line, the space is saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery detection, and in particular relates to a power battery detection device for a pure electric vehicle. Background Art

[0002] Pure electric vehicles (BEVs) rely primarily on high-performance, high-energy-density battery systems. These batteries, the "heart" of the vehicle, store and release electrical energy to drive the motor, which in turn is converted into the mechanical energy required for vehicle operation. Therefore, battery reliability is a key factor affecting the operational reliability of BEVs.

[0003] For power batteries, electrolyte leakage is a difficult point in quality control and a significant factor affecting battery reliability. Existing technologies often use VOC (Volatile Oxygen OC) airtightness testing to determine electrolyte leakage. This technology involves placing the power battery in a sealed chamber and evacuating the chamber. If a leak is detected, electrolyte will leak out. Visual inspection and leak detection can then be used to determine if the battery is leaking.

[0004] In order to test multiple power batteries in batches, some VOC airtightness testing devices are available in the prior art. The power batteries are sequentially conveyed into a sealed chamber via a conveyor line to achieve streamlined testing of the power batteries. However, a disadvantage of this type of testing device is that the conveyor line occupies a large space and easily encroaches on the working space of other equipment in the production workshop. Summary of the Invention

[0005] The purpose of the present invention is to provide a pure electric vehicle power battery testing device, which has the advantage of occupying a small space.

[0006] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is as follows: The embodiment of the present application provides a pure electric vehicle power battery testing device, including a base, a turntable, a vacuum assembly and a receiving assembly. The turntable is rotatably connected to the base, and the rotation axis of the turntable is parallel to the horizontal direction. The turntable is provided with a plurality of mounting holes around the circumference of the turntable. The vacuum assembly is provided on the base, and the vacuum assembly is selectively provided relative to one of the plurality of mounting holes. The receiving assembly is provided in the mounting hole, and the receiving assembly is used to receive the power battery. The receiving assembly cooperates with the vacuum assembly to place the power battery in a negative pressure environment.

[0007] In some embodiments, the accommodating assembly includes an accommodating tube and a flexible sleeve. The accommodating tube is accommodated in the mounting hole, and the accommodating tube is loosely fitted with the mounting hole. A first opening is provided on the side of the accommodating tube close to the vacuum assembly, and a second opening is provided on the side away from the vacuum assembly. A first movable part and a second movable part are provided in the accommodating tube, and the first movable part is provided on the side of the second movable part away from the first opening. The second movable part and the inner wall of the accommodating tube are movably sealed and fitted, and the first movable part and the second movable part are configured to be transmission-connected in opposite directions of displacement. The flexible sleeve is provided on the outside of the peripheral wall of the accommodating tube, and the flexible sleeve is provided with a third opening. The first opening and the third opening are located on the same side of the accommodating tube. The flexible sleeve is connected to the accommodating tube via the third opening and extends into the accommodating tube, and is connected to the first movable part.

[0008] In some embodiments, a protrusion is provided on the outer peripheral wall of the accommodating cylinder, a matching portion is provided on the inner peripheral wall of the mounting hole, a limiting groove is provided on the side of the matching portion facing the protrusion, the protrusion is accommodated in the limiting groove and is gap-matched with the inner wall of the limiting groove, and the flexible sleeve is provided between the limiting groove and the protrusion.

[0009] In some embodiments, the accommodating cylinder is provided with a first air channel, the first air channel includes a first segment and a second segment arranged in parallel, the first segment and the second segment are connected, a first piston is provided in the first segment, the first piston is connected to the first movable part, and a second piston is provided in the second segment, the second piston is connected to the second sealing part.

[0010] In some embodiments, a connecting cable is further included, wherein the connecting cable is connected to the first piston and the second piston.

[0011] In some embodiments, the vacuum assembly includes a vacuum seat, which is connected to the seat body. The vacuum seat includes a first surface facing the third opening, and the third opening is connected to the first surface so that the vacuum seat and the flexible sleeve form a closed chamber. The second movable part is configured to push the power battery in the accommodating cylinder against the first surface when the third opening is against the first surface.

[0012] In some embodiments, the receiving assembly further includes a support ring, and the third opening is connected to the support ring.

[0013] In some embodiments, the vacuum assembly also includes a sealing component, which includes a supporting portion, a second air duct and a flexible membrane. The second air duct is arranged on the vacuum seat, and a recessed portion is provided on the first surface. The recessed portion is arranged around the outer peripheral wall of the support ring. The second air duct is connected to the interior of the recessed portion. The flexible membrane covers the recessed portion to close the recessed portion. The second air duct includes a third segment extending normal to the first surface. The third segment passes through the first surface. The supporting portion is penetrated by the third segment. The supporting portion and the third segment are movably sealed. An elastic member is provided between the supporting portion and the vacuum seat. The supporting portion is used for the power battery to abut.

[0014] The present invention has the following beneficial effects:

[0015] When the turntable rotates, the mounting holes arranged opposite to the vacuum component can be switched, so that different accommodating components can be arranged opposite to the vacuum component. Thus, the device can perform assembly-line inspection, which saves space compared to the traditional assembly-line inspection method through a conveyor line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a pure electric vehicle power battery testing device according to the present invention;

[0017] Figure 2 Schematic diagram of the cooperation between the receiving assembly and the mounting hole (the support ring does not abut against the vacuum seat) of the present invention;

[0018] Figure 3 Schematic diagram of the cooperation between the receiving assembly and the mounting hole (the support ring abuts against the vacuum seat) of the present invention;

[0019] Figure 4 for Figure 3 A partial enlarged view of

[0020] Figure 5 for Figure 4 A magnified view of point A;

[0021] Figure 6 It is a schematic diagram of the state of the gap between the flexible sleeve sealing support ring and the accommodating cylinder of the present invention.

[0022] Figure numbers: 1-turntable, 2-mounting hole, 3-vacuum assembly, 4-accommodating assembly, 5-accommodating cylinder, 6-flexible sleeve, 7-second movable part, 8-first movable part, 9-protruding part, 10-matching part, 11-support ring, 12-vacuum seat, 13-second air channel, 14-recessed part, 15-flexible membrane, 16-resting part, 17-power battery, 18-first piston, 19-second piston, 20-first segment, 21-second segment, 22-connecting rope, 23-first surface. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] An embodiment of the present application provides a testing device for a power battery 17 of a pure electric vehicle, comprising a base, a turntable 1, a vacuum assembly 3, and a receiving assembly 4. The turntable 1 is rotatably connected to the base, with the rotation axis of the turntable 1 parallel to the horizontal direction. The turntable 1 is provided with a plurality of mounting holes 2 around its circumference. The vacuum assembly 3 is provided on the base, and the vacuum assembly 3 is selectively arranged relative to one of the plurality of mounting holes 2. The receiving assembly 4 is provided in the mounting hole 2, and the receiving assembly 4 is used to receive the power battery 17. The receiving assembly 4 cooperates with the vacuum assembly 3 to place the power battery 17 in a negative pressure environment.

[0026] Since the rotation axis of the turntable 1 is parallel to the horizontal direction, the turntable 1 rotates in a vertical plane.

[0027] When the turntable 1 rotates until the mounting hole 2 is aligned with the vacuum assembly 3, the vacuum assembly 3 cooperates with the receiving assembly 4 to place the power battery 17 in a negative pressure environment, thereby enabling VOC airtightness testing of the power battery 17. The specific principles of VOC airtightness testing are well known to those skilled in the art and will not be elaborated here.

[0028] When the turntable 1 rotates, the mounting hole 2 arranged opposite to the vacuum component 3 can be switched, so that different accommodating components 4 can be arranged opposite to the vacuum component 3, and thus the device can perform assembly-line detection, which saves space compared to the traditional assembly-line detection method through a conveyor line.

[0029] In some embodiments, the accommodating assembly 4 includes an accommodating tube 5 and a flexible sleeve 6. The accommodating tube 5 is accommodated in the mounting hole 2, and the accommodating tube 5 is loosely fitted with the mounting hole 2. A first opening is provided on the side of the accommodating tube 5 close to the vacuum assembly 3, and a second opening is provided on the side away from the vacuum assembly 3. A first movable part 8 and a second movable part 7 are provided in the accommodating tube 5. The first movable part 8 is provided on the side of the second movable part 7 away from the first opening. The second movable part 7 and the inner wall of the accommodating tube 5 are movably sealed and fitted. The first movable part 8 and the second movable part 7 are configured to be transmission-connected in opposite directions of displacement. The flexible sleeve 6 is sleeved on the outer peripheral wall of the accommodating tube 5. The flexible sleeve 6 is provided with a third opening. The first opening and the third opening are located on the same side of the accommodating tube 5. The flexible sleeve 6 is connected to the accommodating tube 5 via the third opening and is connected to the first movable part 8.

[0030] The power battery 17 is placed into the accommodating tube 5 through the first opening.

[0031] The first movable portion 8 and the second movable portion 7 are provided in the accommodating tube 5 so as to be movable along the axial direction of the accommodating tube 5 .

[0032] The first movable part 8 and the second movable part 7 are configured to be transmission-connected with opposite displacement directions, which means that when the first movable part 8 moves toward the side close to the second opening, the second movable part 7 moves toward the side close to the first opening, and conversely, when the first movable part 8 moves toward the side close to the first opening, the second movable part 7 moves toward the side close to the second opening.

[0033] The flexible sleeve 6 is sleeved on the outer peripheral wall of the accommodating tube 5, so that when the third opening of the flexible sleeve 6 is closed, the flexible sleeve 6 forms a closed chamber, thereby allowing the power battery 17 arranged in the accommodating tube 5 to be in a negative pressure environment for airtightness testing.

[0034] The flexible sleeve 6 is connected to the accommodating tube 5 through the third opening and is connected to the first movable part 8, so that the flexible sleeve 6 can be partially received in the accommodating tube 5, and when the flexible sleeve 6 is pulled to move along the axial direction of the accommodating tube 5, the flexible sleeve 6 can drive the first movable part 8 to move, and then the second movable part 7 can also move. This makes the flexible sleeve 6 not only provide a sealed chamber, but also unload the power battery 17 from the accommodating tube 5 and serve as a discharge channel. That is, when the power battery 17 is detected, the flexible sleeve 6 is pulled outward from the side of the mounting hole 2 close to the first opening. At this time, the first movable part 8 moves toward the side close to the second opening, and the second movable part 7 moves toward the side close to the first opening, so that the power battery 17 in the accommodating tube 5 can be ejected. The ejected power battery 17 enters the flexible sleeve 6, and the power battery 17 can be transported to the designated position through the flexible sleeve 6.

[0035] After unloading is completed, the first movable part 8 is reset, so that the second movable part 7 and the flexible sleeve 6 can be reset.

[0036] In the embodiment of the present application, the reset component of the first movable part 8 can be selected from the existing structure. For example, the turntable 1 can be provided with a cylinder, and the telescopic end of the cylinder is connected to the first movable part 8 via the second opening, so that the first movable part 8 can be reset.

[0037] In some embodiments, a protrusion 9 is provided on the outer peripheral wall of the accommodating cylinder 5, and a matching portion 10 is provided on the inner peripheral wall of the mounting hole 2. A limiting groove is provided on the side of the matching portion 10 facing the protrusion 9. The protrusion 9 is accommodated in the limiting groove and is gap-matched with the inner wall of the limiting groove. The flexible sleeve 6 is provided between the limiting groove and the protrusion 9.

[0038] The protrusion 9 cooperates with the limiting groove so that the accommodating tube 5 can be fixed in the mounting hole 2 .

[0039] The protrusion 9 and the limiting groove are loosely matched, so that the flexible sleeve 6 can be pulled from the side of the accommodating cylinder 5 close to the second opening to the side close to the first opening.

[0040] In the embodiment of the present application, as needed, a plurality of protruding portions 9 can be provided along the axial direction of the accommodating tube 5 , and similarly, a plurality of matching portions 10 can also be provided.

[0041] In some embodiments, the accommodating cylinder 5 is provided with a first air duct, which includes a first segment 20 and a second segment 21 arranged in parallel, and the first segment 20 and the second segment 21 are connected. A first piston 18 is provided in the first segment 20, and the first piston 18 is connected to the first movable part 8. A second piston 19 is provided in the second segment 21, and the second piston 19 is connected to the second sealing part.

[0042] The first segment 20 and the second segment 21 can extend along the axial direction of the accommodating tube 5. When the first piston 18 moves driven by the first movable part 8, the second piston 19 can be pushed under the action of air pressure, thereby enabling the second movable part 7 to move under the drive of the second piston 19.

[0043] In some embodiments, a connecting cable 22 is further included, and the connecting cable 22 is connected to the first piston 18 and the second piston 19.

[0044] When the first piston 18 moves toward the second opening side close to the accommodating cylinder 5, the second piston 19 moves under the action of air pressure. Conversely, when the first piston 18 is reset, the second piston 19 may not be able to be reset. Therefore, the first piston 18 and the second piston 19 are connected by a connecting rope 22, so that when the first piston 18 is reset, the connecting rope 22 can pull the second piston 19 to reset.

[0045] In some embodiments, the vacuum assembly 3 includes a vacuum seat 12, which is connected to the seat body. The vacuum seat 12 includes a first surface 23 facing the third opening. The third opening is connected to the first surface 23, so that the vacuum seat 12 and the flexible sleeve 6 form a closed chamber. The second movable part 7 is configured to push the power battery 17 in the accommodating tube 5 against the first surface 23 when the third opening abuts against the first surface 23.

[0046] The first surface 23 may be provided with an exhaust channel. When the third opening abuts against the first surface 23 , the exhaust channel is connected to the interior of the flexible sleeve 6 , so that the interior of the flexible channel can be vacuumed through the exhaust channel.

[0047] The exhaust device connected to the exhaust channel can be selected from existing products and will not be described in detail here.

[0048] During the airtightness test, the flexible sleeve 6 is pulled and moved, causing the third opening to abut against the first surface 23, thereby sealing the third opening. Simultaneously, under the action of the flexible sleeve 6, the power battery 17 in the accommodating tube 5 abuts against the first surface 23, facilitating detection by an inspection device provided on the first surface 23 to determine whether the accommodating tube 5 contains a power battery 17. That is, if no power battery 17 is detected when the third opening of the flexible sleeve 6 abuts against the first surface 23, then the accommodating tube 5 may not contain a power battery 17, and the inspection device can issue a warning to the operator. The inspection device can be selected from existing products, and its structure and working principle are well known to those skilled in the art and will not be described in detail here.

[0049] Furthermore, when conducting the air tightness test, the power battery 17 rests against the first surface 23, that is, the power battery 17 partially protrudes from the accommodating tube 5, so that after the test is completed, the power battery 17 can be clamped by a clamping device or a robotic arm and other equipment to remove the power battery 17.

[0050] In some embodiments, the accommodating assembly 4 further includes a support ring 11 , and the third opening is connected to the support ring 11 .

[0051] On the one hand, the support ring 11 is used to support the third opening so that the third opening can be in an expanded state. On the other hand, due to the movable sealing cooperation between the second movable part 7 and the accommodating tube 5, the second movable part 7 and the accommodating tube 5 can also form a chamber structure with better sealing performance. In the embodiment where an exhaust channel is provided on the first surface 23, the exhaust channel can be provided inside the support ring 11. When the support ring 11 is against the first surface 23, part of the flexible sleeve 6 is between the support ring 11 and the first opening of the accommodating tube 5. When the interior of the flexible sleeve 6 is vacuumed through the exhaust channel, part of the surface wall of the flexible sleeve 6 is deformed under the action of negative pressure, so that the gap between the support ring 11 and the accommodating tube 5 can be sealed by the flexible sleeve 6. At this time, the accommodating tube 5, the first surface 23 and the support ring 11 can also form a closed chamber, that is, in the embodiment of the present application, a two-layer chamber structure can be formed, which increases the vacuuming effect on the power battery 17.

[0052] The equipment for pulling the support ring 11 to move can be selected from the existing structure. For example, the turntable 1 can be provided with a robotic arm, which pulls the support ring 11 so that the support ring 11 can be against the first surface 23. Similarly, when unloading, the robotic arm can pull the support ring 11 to the unloading location so that the power battery 17 can be unloaded to the designated location.

[0053] In some embodiments, the vacuum assembly 3 also includes a sealing component, which includes a supporting portion 16, a second air channel 13 and a flexible membrane 15. The second air channel 13 is arranged on the vacuum seat 12, and the first surface 23 is provided with a recessed portion 14. The recessed portion 14 is arranged around the outer peripheral wall of the support ring 11. The second air channel 13 is connected to the interior of the recessed portion 14. The flexible membrane 15 covers the recessed portion 14 to close the recessed portion 14. The second air channel 13 includes a third segment extending normally along the first surface 23. The third segment passes through the first surface 23. The supporting portion 16 is penetrated by the third segment. The supporting portion 16 is movably sealed with the third segment. An elastic member is provided between the supporting portion 16 and the vacuum seat 12. The supporting portion 16 is used for the power battery 17 to abut.

[0054] On the one hand, the recessed portion 14 is used to accommodate the flexible membrane 15. Specifically, when the recessed portion 14 is in a negative pressure state, the flexible membrane 15 is sucked into the recessed portion 14, reducing the risk of the flexible membrane 15 obstructing the rotation of the turntable 1. On the other hand, because the recessed portion 14 is arranged around the outer peripheral wall of the support ring 11, when the recessed portion 14 is inflated, the flexible membrane 15 expands outward, and the gap between the support ring 11 and the first surface 23 can be sealed by the flexible membrane 15, thereby improving the sealing effect.

[0055] The elastic member may be a spring.

[0056] The elastic member can be used to provide elastic force to make the abutting portion 16 protrude from the first surface 23 . At this time, the recessed portion 14 is in a negative pressure state under the action of the abutting portion 16 , and the flexible membrane 15 is sucked into the recessed portion 14 .

[0057] When the power battery 17 moves to abut against the first surface 23 under the action of the second movable part 7, the power battery 17 can push the abutting part 16 to move, and the abutting part 16 allows the recessed part 14 to be inflated. At this time, the flexible membrane 15 expands to seal the gap between the support ring 11 and the first surface 23. Furthermore, by judging whether the support ring 11 is expanded, it is possible to judge whether there is a power battery 17 in the accommodating tube 5.

[0058] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various deformations, modifications, and substitutions made by ordinary technicians in this field to the technical solutions of the present invention should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. A pure electric vehicle power battery testing device, characterized in that: include: seat body; A turntable (1) is rotatably connected to the base, the rotation axis of the turntable (1) is parallel to the horizontal direction, and a plurality of mounting holes (2) are provided around the circumference of the turntable (1); A vacuum component (3) is arranged on the seat, and the vacuum component (3) is selectively arranged opposite to one of the plurality of mounting holes (2); A receiving assembly (4) is arranged in the mounting hole (2), the receiving assembly (4) is used to receive a power battery (17), and the receiving assembly (4) cooperates with the vacuum assembly (3) to place the power battery (17) in a negative pressure environment.

2. The pure electric vehicle power battery testing equipment according to claim 1, characterized in that: The receiving assembly (4) comprises: A receiving tube (5) is received in the mounting hole (2), the receiving tube (5) and the mounting hole (2) are clearance-matched, a first opening is provided on a side of the receiving tube (5) close to the vacuum component (3), and a second opening is provided on a side away from the vacuum component (3), a first movable part (8) and a second movable part (7) are provided in the receiving tube (5), the first movable part (8) is provided on a side of the second movable part (7) away from the first opening, the second movable part (7) and the inner wall of the receiving tube (5) are movably sealed, and the first movable part (8) and the second movable part (7) are configured to be transmission-connected in opposite displacement directions; A flexible sleeve (6) is sleeved on the outer peripheral wall of the accommodating tube (5), and the flexible sleeve (6) is provided with a third opening. The first opening and the third opening are located on the same side of the accommodating tube (5). The flexible sleeve (6) is connected to the accommodating tube (5) via the third opening and extends into the accommodating tube (5) to be connected to the first movable part (8).

3. The pure electric vehicle power battery testing equipment according to claim 2, characterized in that: The outer peripheral wall of the accommodating cylinder (5) is provided with a protruding portion (9), the inner peripheral wall of the mounting hole (2) is provided with a matching portion (10), and a limiting groove is provided on the side of the matching portion (10) facing the protruding portion (9). The protruding portion (9) is accommodated in the limiting groove and is clearance-matched with the inner wall of the limiting groove. The flexible sleeve (6) is provided between the limiting groove and the protruding portion (9).

4. The pure electric vehicle power battery testing equipment according to claim 2, characterized in that: The accommodating cylinder (5) is provided with a first air channel, the first air channel includes a first segment (20) and a second segment (21) arranged in parallel, the first segment (20) and the second segment (21) are connected, a first piston (18) is provided in the first segment (20), the first piston (18) is connected to the first movable part (8), and a second piston (19) is provided in the second segment (21), and the second piston (19) is connected to the second sealing part.

5. The pure electric vehicle power battery testing equipment according to claim 4, characterized in that: It also includes a connecting cable (22), wherein the connecting cable (22) is connected to the first piston (18) and the second piston (19).

6. The pure electric vehicle power battery testing equipment according to claim 2, characterized in that: The vacuum assembly (3) includes a vacuum seat (12), the vacuum seat (12) is connected to the seat body, the vacuum seat (12) includes a first surface (23) facing the third opening, the third opening is connected to the first surface (23), so that the vacuum seat (12) and the flexible sleeve (6) form a closed chamber, and the second movable part (7) is configured to push the power battery (17) in the accommodating tube (5) against the first surface (23) when the third opening is against the first surface (23).

7. The pure electric vehicle power battery testing equipment according to claim 6, characterized in that: The accommodating assembly (4) further comprises a supporting ring (11), and the third opening is connected to the supporting ring (11).

8. The pure electric vehicle power battery testing equipment according to claim 7, characterized in that: The vacuum assembly (3) further comprises a sealing component, the sealing component comprising a supporting portion (16), a second air channel (13) and a flexible membrane (15), the second air channel (13) being arranged on the vacuum seat (12), the first surface (23) being provided with a recessed portion (14), the recessed portion (14) being arranged around the outer peripheral wall of the support ring (11), the second air channel (13) being communicated with the interior of the recessed portion (14), the flexible membrane (15) covering the recessed portion (14). The recessed portion (14) is formed to close the recessed portion (14); the second air channel (13) includes a third segment extending along the normal direction of the first surface (23); the third segment passes through the first surface (23); the abutting portion (16) is provided in the third segment; the abutting portion (16) and the third segment are movably sealed together; an elastic member is provided between the abutting portion (16) and the vacuum seat (12); the abutting portion (16) is used for abutting the power battery (17).

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