A shielding test device for electronic BMS in new energy vehicles

Abstract

This utility model discloses a shielding test device for a new energy vehicle electronic BMS, comprising: a shielding box, including a lower shell, an upper shell, and an opening / closing drive component; the upper shell is rotatably connected to the lower shell, and the opening / closing drive component is disposed between the lower shell and the upper shell, used to drive the upper shell to rotate and open or close relative to the lower shell; a fixture assembly, disposed within the shielding box, comprising a bracket, a test fixture, and a locking component; the bracket is connected to the lower shell, the test fixture is disposed on the bracket and has a test station for testing the component under test (DUT); the locking component has a locked state and an unlocked state; in the locked state, the locking component locks the test fixture to the bracket; in the unlocked state, the test fixture can move forward relative to the bracket until it separates from the bracket; wherein, the upper shell can open relative to the lower shell to form a pick-and-place opening on the front side of the shielding box, the pick-and-place opening allowing the DUT and the test fixture to pass through. This utility model can effectively improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronic BMS performance testing technology, and in particular to a shielding testing device for electronic BMS in new energy vehicles. Background Technology

[0002] The rapid development of new energy vehicles relies heavily on the support of Battery Management Systems (BMS). BMS plays a crucial role in monitoring, protecting, and managing batteries in electric vehicles. Operating in complex and variable environments, the reliability of BMS directly impacts the performance and safety of the battery and the entire vehicle. Therefore, a robust testing system is essential during the manufacturing process. A rigorous testing system can effectively identify and eliminate potential design and manufacturing defects, ensuring product quality. Testing automotive electronic BMS typically requires a shielded enclosure. The test fixture is placed inside the enclosure, and external testing instruments are then connected. The shielded enclosure provides an interference-free testing environment for the device under test (DUT), essentially absorbing internal interference and shielding external electromagnetic signals. However, in existing designs, the shielded enclosure requires manual opening and closing, impacting production efficiency. Furthermore, BMS boards come in different sizes and specifications, requiring different models of test fixtures. The current design also presents the problem of cumbersome fixture changes, further hindering production efficiency. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a shielding test device for electronic BMS (Battery Management System) in new energy vehicles, which is easy to use and has convenient fixture changes, effectively improving production efficiency.

[0004] The new energy vehicle electronic BMS shielding test equipment according to an embodiment of the present utility model includes:

[0005] A shielded box includes a lower shell, an upper shell, and an opening / closing drive. The rear end of the upper shell is rotatably connected to the rear end of the lower shell. The opening / closing drive is disposed between the lower shell and the upper shell and is used to drive the upper shell to rotate so as to open or close relative to the lower shell.

[0006] A fixture assembly is disposed within the shielded enclosure. The fixture assembly includes a support, a test fixture, and a locking member. The support is connected to the lower housing. The test fixture is disposed on the support and has a test station for testing the device under test. The locking member has a locked state and an unlocked state. In the locked state, the locking member locks the test fixture to the support. In the unlocked state, the test fixture can move forward relative to the support until it separates from the support.

[0007] The upper housing can open relative to the lower housing to form a pick-and-place opening on the front side of the shielding box, and the pick-and-place opening allows the test piece and the test fixture to pass through.

[0008] The shielding test equipment for electronic BMS of new energy vehicles according to the embodiments of this utility model has at least the following beneficial effects:

[0009] In this embodiment, before or after testing the test piece, the upper housing can be opened relative to the lower housing by the opening and closing drive to form a pick-and-place opening on the front of the shielded box. The test piece can then be picked up or placed from the pick-and-place opening without the need for manual opening and closing of the shielded box, making the operation convenient. In addition, when it is necessary to change the test fixture to match different specifications of test pieces, the opening and closing drive can also be used to open the upper housing relative to the lower housing to form a pick-and-place opening on the front of the shielded box. Then, the locking device can be adjusted to release the locking device from the test fixture. The test fixture can then be pulled forward relative to the support, separating the test fixture from the support and detaching it from the pick-and-place opening of the shielded box for replacement. The operation is also very convenient. Through the above settings, the use of the equipment and the change of test fixtures are very convenient, which can effectively improve production efficiency.

[0010] According to some embodiments of this utility model, the new energy vehicle electronic BMS shielding test equipment further includes:

[0011] The cabinet is provided with a mounting cavity and an operating port is provided on the front side of the mounting cavity;

[0012] The testing instrument is disposed within the mounting cavity and is used to connect to the testing fixture;

[0013] The shielding box is located inside the mounting cavity and is directly opposite the operating port.

[0014] According to some embodiments of the present invention, the bracket includes a fixed frame and a movable frame, the fixed frame is connected to the lower housing, and the movable frame is vertically and flexibly disposed on the upper side of the fixed frame;

[0015] The test fixture includes a first fixture and a second fixture. The first fixture is disposed on the fixed frame, and the second fixture is disposed on the movable frame. The second fixture can be raised and lowered synchronously with the movable frame to engage or disengage with the second fixture.

[0016] The locking components include a first locking component and a second locking component. The first locking component is used to lock the first fixture to the fixed frame, and the second locking component is used to lock the second fixture to the movable frame.

[0017] According to some embodiments of the present invention, the fixing frame is provided with a support surface to support the first fixture, and the bracket is provided with limit strips on the left and right sides of the first fixture to limit the first fixture to the left and right; wherein, in the locked state, the first locking member positions the first fixture and the fixing frame relative to each other in the front-back direction.

[0018] According to some embodiments of the present invention, the supporting surface is provided with a vertically extending locking hole, and the first locking member includes:

[0019] The fixing part is disposed on the first fixture;

[0020] The movable part is vertically and movably mounted on the fixed part, and the top end of the movable part protrudes from the fixed part;

[0021] An elastic portion is disposed between the fixed portion and the movable portion, and is used to apply a downward elastic force to the movable portion so that the movable portion can be partially inserted into the locking hole.

[0022] According to some embodiments of the present invention, the fixing bracket is provided with an abutment portion on the rear side of the first fixture, the abutment portion being used to abut against the first fixture so that the movable portion is vertically aligned with the locking hole.

[0023] According to some embodiments of the present invention, the top end of the abutting part is provided with a boss, which is used to abut against the upper end of the first fixture to vertically limit the first fixture.

[0024] According to some embodiments of the present invention, the movable frame is provided with front-to-back extending limiting grooves on the left and right sides of the second fixture, and the left and right ends of the second fixture are respectively embedded in the corresponding limiting grooves; wherein, in the locked state, the second locking member positions the second fixture and the movable frame relative to each other in the front-to-back direction.

[0025] According to some embodiments of the present invention, the second locking member includes:

[0026] The pressure block is vertically adjustable and is set on the movable frame. During the vertical movement of the pressure block, it can press the second fixture against the upper end face of the limiting groove, or separate the second fixture from the upper end face of the limiting groove.

[0027] According to some embodiments of the present invention, the second locking member further includes:

[0028] Adjusting screws, the adjusting screws being threaded onto the movable frame and vertically distributed;

[0029] The movable frame is equipped with a guide structure to guide the vertical movement of the pressure block. The pressure block is threadedly connected to the adjusting screw. During the rotation of the adjusting screw, the pressure block can be driven to move vertically relative to the movable frame.

[0030] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0032] Figure 1 This is a schematic diagram of the structure of the new energy vehicle electronic BMS shielding test equipment according to an embodiment of this utility model;

[0033] Figure 2 This is a schematic diagram of the installation structure of the new energy vehicle electronic BMS shielding test equipment according to an embodiment of this utility model;

[0034] Figure 3 This is a schematic diagram of the installation structure of the shielding box and fixture assembly according to an embodiment of the present utility model;

[0035] Figure 4 This is a schematic diagram of the fixture assembly according to an embodiment of the present invention;

[0036] Figure 5 This is an exploded view of the installation structure of the first fixture and fixing frame according to an embodiment of the present utility model;

[0037] Figure 6 This is a schematic diagram of the installation structure of the second fixture and the movable frame according to an embodiment of the present utility model;

[0038] Figure 7 This is an exploded view of the installation structure of the second fixture and movable frame according to an embodiment of the present utility model.

[0039] Icon labels:

[0040] Shielding box 100, loading and unloading port 101, lower shell 110, upper shell 120, opening and closing drive component 130;

[0041] Fixture assembly 200, fixing frame 210, supporting surface 211, limiting strip 212, locking hole 213, abutting part 214, boss 215, movable frame 220, limiting groove 221, guide groove 222, first fixture 230, second fixture 240, first locking member 250, fixing part 251, movable part 252, second locking member 260, pressure block 261, adjusting screw 262, lifting drive member 270, male plug 280, plug drive member 290;

[0042] Cabinet 300, mounting cavity 301, operating port 302;

[0043] Test instrument 400. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0047] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0048] To facilitate understanding of the solution, a brief description of existing shielding boxes is provided first. Shielding boxes are primarily used for testing wireless communication products. They are shielding bodies of various shapes, such as shells, plates, and sleeves, made of conductive or magnetic materials. These boxes confine electromagnetic energy within a certain spatial range, suppressing radiated interference and processing conducted and radiated signals to provide an interference-free testing environment for the wireless communication device under test. Wireless communication products such as mobile phones, wireless network cards, WLAN routers, WIFI routers, smart home devices, and smart cars all require testing during production. These tests are typically conducted using high-frequency transmitters, which inherently introduce interference. Shielding boxes improve the testing environment, shielding against interfering factors, increasing test pass rates, ensuring the reliability of RF test results, and facilitating the successful completion of board testing and final testing of wireless communication products.

[0049] The following description, with reference to the accompanying drawings, describes a shielding test device for electronic BMS of new energy vehicles according to an embodiment of the present invention.

[0050] Reference Figures 2 to 4 As shown, an embodiment of the new energy vehicle electronic BMS shielding test equipment of this utility model includes: a shielding box 100 and a fixture assembly 200.

[0051] The shielding box 100 includes a lower shell 110, an upper shell 120, and an opening and closing drive 130. The rear end of the upper shell 120 is rotatably connected to the rear end of the lower shell 110, and the upper shell 120 is located on the upper side of the lower shell 110. The opening and closing drive 130 is disposed between the lower shell 110 and the upper shell 120 and is used to drive the upper shell 120 to rotate so as to open or close relative to the lower shell 110. It can be understood that when the upper shell 120 is closed relative to the lower shell 110, the edges of the two abut against each other to form a closed cavity between them.

[0052] The fixture assembly 200 is disposed within the shielded box 100. The fixture assembly 200 includes a bracket, a test fixture, and a locking member. The bracket is connected to the lower housing 110. The test fixture is disposed on the bracket and has a test station for testing the test piece. The locking member is disposed between the bracket and the test fixture and has a locked state and an unlocked state. In the locked state, the locking member locks the test fixture to the bracket. In the unlocked state, the test fixture can move forward relative to the bracket until it separates from the bracket.

[0053] The upper housing 120, driven by the opening and closing drive 130, can open relative to the lower housing 110 to form an access port 101 on the front side of the shielded box 100 (e.g., ...). Figure 3 As shown, the pick-and-place port 101 allows the component under test (BMS board) and the test fixture to pass through. That is, during testing, the component under test can be picked up and placed through the pick-and-place port 101 formed between the upper housing 120 and the lower housing 110. When changing the test fixture, the test fixture can be picked up and placed through the pick-and-place port 101 formed between the upper housing 120 and the lower housing 110. Clearly, this pick-and-place port 101 is directly opposite the test fixture.

[0054] In this embodiment of the new energy vehicle electronic BMS shielding test equipment, before or after testing the component under test, the upper housing 120 can be opened relative to the lower housing 110 by the opening and closing drive component 130 to form a pick-up and put-out port 101 on the front side of the shielding box 100. Then, the component under test can be picked up and put out from the pick-up and put-out port 101 without the need for manual opening and closing of the shielding box 100, making the operation convenient. In addition, when it is necessary to change the test fixture to match different specifications of the component under test, the opening and closing drive component 130 can also be used to open the upper housing 120 relative to the lower housing 110 to form a pick-up and put-out port 101 on the front side of the shielding box 100. Then, the locking component can be adjusted to release the locking component from the test fixture. The test fixture can then be pulled forward relative to the bracket, so that the test fixture is separated from the bracket and detached from the shielding box 100 through the pick-up and put-out port 101, thereby replacing it. The operation is also very convenient. Through the above settings, the use of the equipment and the change of test fixtures are very convenient, which can effectively improve production efficiency.

[0055] It is conceivable that the upper housing 120 and the lower housing 110 can be rotatably connected by a hinge.

[0056] It is conceivable that both the upper shell 120 and the lower shell 110 of the shielding box 100 are equipped with wave-absorbing materials, so that when the two are closed, a continuous and complete shielding space is formed.

[0057] It is conceivable that the opening and closing drive component 130 can adopt various power forms, such as an electric actuator, hydraulic cylinder, or pneumatic cylinder, and its fixed end and telescopic end are respectively hinged to the lower housing 110 and the upper housing 120. In addition, to ensure stability, the opening and closing drive component 130 is provided on both the left and right sides of the shielding box 100.

[0058] It should be noted that the test fixture also needs to be connected to some external testing instruments to transmit the test signals to the testing instruments for processing.

[0059] Based on this, in order to achieve modular and integrated design, in some embodiments, reference is made to Figure 1 and Figure 2As shown, the new energy vehicle electronic BMS shielding test equipment also includes a cabinet 300 and a test instrument 400. The cabinet 300 has a mounting cavity 301 and an operation port 302 on the front side of the mounting cavity 301. The test instrument 400 is located inside the mounting cavity 301 and is used to connect to a test fixture to obtain and process the test signals from the test fixture. Additionally, a shielding box 100 is also located inside the mounting cavity 301, directly opposite the operation port 302, allowing operators to place or remove the device under test (DUT) or the test fixture from this port 302. Specifically, the bottom of the shielding box 100 has connection terminals; the inner end of the connection terminal is used to connect to the test fixture, and the outer end is used to connect to the test instrument 400. Furthermore, for easy relocation, casters can be installed at the bottom of the cabinet 300.

[0060] Based on the above embodiments, it is conceivable that a human-machine interface component can be installed on the cabinet 300 to facilitate operation by personnel. The human-machine interface component may include control buttons, a display screen, a barcode scanner, a three-color alarm light, a through-beam grating sensor, etc. The testing instrument 400 can be configured as needed, and may include an analog battery cell module, a programmable DC power source, a switching matrix module, a temperature resistor module, a PWM signal simulation module, a PLC control module, a high-precision power resistor module, an industrial computer, a multimeter, a relay module, etc. These are conventional technical means and will not be elaborated upon here.

[0061] Additionally, refer to Figure 5 As shown, it is conceivable that since the test fixture needs to connect to the connecting terminal and then to the test instrument 400, corresponding wiring harnesses or connectors must be installed between the test fixture and the connecting terminal. Changing the test fixture also requires operating these wiring harnesses or connectors. To eliminate this operation and improve efficiency, a male plug 280 can be installed on the support at the rear of the test fixture. The male plug 280 is connected to the inner end of the connecting terminal of the shielding box 100 via a wiring harness. A female plug matching the male plug 280 is installed at the rear of the test fixture, so that the insertion and separation directions of the male plug 280 and the female plug are in the front-back direction. In this way, the male plug 280 and the female plug can automatically connect or disconnect. Alternatively, a plug drive 290 can be installed on the support to drive the male plug 280 to move back and forth. In this way, when the test fixture is not needed, the male plug 280 and the female plug can be separated, avoiding the male plug 280 and the female plug being constantly connected, thus improving safety. The plug drive 290 can be a hydraulic cylinder, a pneumatic cylinder, or an electric push rod, etc.

[0062] Reference Figures 4 to 6As shown, in some embodiments of this utility model, the bracket includes a fixed frame 210 and a movable frame 220. The fixed frame 210 is connected to the lower housing 110. Specifically, an mounting bracket can be provided in the lower housing 110 to raise and install the fixed frame 210. In addition, the movable frame 220 is movably disposed on the upper side of the fixed frame 210. Specifically, a vertically extending guide column can be provided on the fixed frame 210, and a guide sleeve is provided on the movable frame 220 corresponding to the guide column to provide guidance for the lifting and lowering of the movable frame 220. At the same time, a lifting drive component 270 can be provided between the fixed frame 210 and the movable frame 220 to drive the movable frame 220 to lift and lower. The lifting drive component 270 can be a hydraulic cylinder, a pneumatic cylinder, an electric push rod, a motor screw mechanism, etc.

[0063] The test fixture includes a first fixture 230 and a second fixture 240. The first fixture 230 is mounted on a fixed frame 210, and the second fixture 240 is mounted on a movable frame 220. The second fixture 240 can be raised and lowered synchronously with the movable frame 220 to engage or disengage with the first fixture 230. When the second fixture 240 engages with the first fixture 230, the test piece is tested. It should be noted that the first fixture 230 and the second fixture 240 are used together and must be replaced together when replacing them.

[0064] The locking components include a first locking component 250 and a second locking component 260. The first locking component 250 is used to lock the first fixture 230 to the fixed frame 210, and the second locking component 260 is used to lock the second fixture 240 to the movable frame 220. That is, when the first locking component 250 is locked, it locks the first fixture 230 to the fixed frame 210. When it is unlocked, the first fixture 230 can move forward under the action of external force to separate from the fixed frame 210. When the second locking component 260 is locked, it locks the second fixture 240 to the movable frame 220. When it is unlocked, the second fixture 240 can move forward under the action of external force to separate from the movable frame 220. It should be noted that the locking and unlocking of the first locking component 250 and the locking and unlocking of the second locking component 260 do not interfere with each other.

[0065] Obviously, the plug drive 290 and the male plug 280 can be mounted on the fixing frame 210, and the female plug can be mounted on the first fixture 230.

[0066] Reference Figure 4 and Figure 5As shown, in some embodiments of this utility model, the fixing frame 210 is provided with a support surface 211 to support the first fixture 230. The vertical limitation of the first fixture 230 can be achieved by the support surface 211 and the weight of the first fixture 230 itself. In addition, the bracket is provided with limit strips 212 on the left and right sides of the first fixture 230 to limit the first fixture 230 to the left and right. In the locked state, the first locking member 250 positions the first fixture 230 and the fixing frame 210 relative to each other in the front-back direction, thereby locking the first fixture 230 on the fixing frame 210 in conjunction with the support surface 211 and the limit strips 212. When replacing the first fixture 230, the first locking member 250 can be switched to the unlocked state to pull the first fixture 230 forward, which is very convenient.

[0067] Reference Figure 4 and Figure 5 As shown, in some embodiments of this utility model, the support surface 211 is provided with a vertically extending locking hole 213. The first locking member 250 includes a fixed part 251, a movable part 252, and an elastic part (not shown). The fixed part 251 is fixedly disposed on the first fixture 230. The movable part 252 is vertically movablely installed on the fixed part 251, and the top end of the movable part 252 protrudes from the fixed part 251 to provide a force application position for the operator. The elastic part is disposed between the fixed part 251 and the movable part 252. The elastic part is used to apply a downward elastic force to the movable part 252 so that the movable part 252 can be partially inserted into the locking hole 213. When unlocking is required, the movable part 252 is pulled upward to separate the movable part 252 from the locking hole 213, and then the first fixture 230 can be pulled forward, which is very convenient to operate.

[0068] Obviously, the fixed part 251 and the movable part 252 can be of various shapes. This embodiment does not limit their specific shapes. The elastic part can be a compression spring. The fixed part 251, the movable part 252 and the elastic part can be connected into an integral structure for assembly and disassembly as a whole. For example, the first locking member 250 can be an indexing pin.

[0069] Reference Figure 5 As shown, in some embodiments of this utility model, the fixing bracket 210 is provided with an abutment portion 214 on the rear side of the first fixture 230. The abutment portion 214 is used to abut against the first fixture 230 so that the movable part 252 is vertically aligned with the locking hole 213. Thus, when installing the first fixture 230, the abutment portion 214 can provide a positioning reminder by abutting against the first fixture 230, quickly aligning the movable part 252 with the locking hole 213 and improving efficiency. The abutment portion 214 can be of various shapes such as block, plate, or column.

[0070] Furthermore, refer to Figure 5As shown, a boss 215 is provided at the top of the abutment part 214. The boss 215 is used to abut against the upper end of the first fixture 230 to vertically limit the first fixture 230. By providing the boss 215, an additional layer of protection can be added on the basis of using the weight of the first fixture 230 itself for vertical limiting, thereby improving the structural reliability.

[0071] Reference Figure 6 and Figure 7 As shown, in some embodiments of this utility model, the movable frame 220 is provided with front-to-back extending limiting grooves 221 on the left and right sides of the second fixture 240, and the left and right ends of the second fixture 240 are respectively embedded in the corresponding limiting grooves 221 to achieve vertical and left-to-right limiting of the second fixture 240; wherein, in the locked state, the second locking member 260 positions the second fixture 240 and the movable frame 220 relative to each other in the front-to-back direction, thereby locking the second fixture 240 on the movable frame 220 in conjunction with the limiting grooves 221. When replacing the second fixture 240, it is only necessary to switch the second locking member 260 to the unlocked state to pull the second fixture 240 forward, which is very convenient to operate.

[0072] Reference Figure 6 and Figure 7 As shown, in some embodiments of this utility model, the second locking member 260 includes a pressure block 261. The pressure block 261 is vertically adjustable and disposed on the movable frame 220. During the vertical movement of the pressure block 261 relative to the movable frame 220, it can press the second fixture 240 against the upper end face of the limiting groove 221, or separate the second fixture 240 from the upper end face of the limiting groove 221. Pressing the second fixture 240 against the upper end face of the limiting groove 221 locks the second fixture 240 onto the movable frame 220. When the second fixture 240 separates from the upper end face of the limiting groove 221, the second fixture 240 can be pulled forward away from the movable frame 220. In this embodiment, the advantage of setting the pressure block 261 and locking the second fixture 240 by pressing is that it can stably and reliably lock the second fixture 240 onto the movable frame 220, avoiding relative shaking between the second fixture 240 and the movable frame 220 during the lifting and lowering process of the movable frame 220.

[0073] Reference Figure 6 and Figure 7 As shown, in some embodiments of this utility model, the second locking member 260 further includes an adjusting screw 262; the adjusting screw 262 is threadedly installed on the movable frame 220 and is vertically distributed; wherein, the movable frame 220 is provided with a guide structure to provide guidance for the vertical movement of the pressure block 261, the pressure block 261 is threadedly connected to the adjusting screw 262, and during the rotation of the adjusting screw 262, it can drive the pressure block 261 to move vertically relative to the movable frame 220, making the adjustment operation very convenient.

[0074] Specifically, the adjusting screw 262 can be a butterfly screw to facilitate the operator's tightening operation; the guide structure can be a vertically distributed guide groove 222, and the pressure block 261 is located in the guide groove 222.

[0075] Obviously, in order to improve structural stability, second locking elements 260 are provided on both the left and right sides of the second fixture 240.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine different embodiments or examples described in this specification.

[0077] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A shielding test device for electronic BMS of new energy vehicles, characterized in that, include: A shielded box includes a lower shell, an upper shell, and an opening / closing drive. The rear end of the upper shell is rotatably connected to the rear end of the lower shell. The opening / closing drive is disposed between the lower shell and the upper shell and is used to drive the upper shell to rotate so as to open or close relative to the lower shell. A fixture assembly is disposed within the shielded enclosure. The fixture assembly includes a support, a test fixture, and a locking member. The support is connected to the lower housing. The test fixture is disposed on the support and has a test station for testing the device under test. The locking member has a locked state and an unlocked state. In the locked state, the locking member locks the test fixture to the support. In the unlocked state, the test fixture can move forward relative to the support until it separates from the support. The upper housing can open relative to the lower housing to form a pick-and-place opening on the front side of the shielding box, and the pick-and-place opening allows the test piece and the test fixture to pass through.

2. The new energy vehicle electronic BMS shielding test equipment according to claim 1, characterized in that, The new energy vehicle electronic BMS shielding test equipment also includes: The cabinet is provided with a mounting cavity and an operating port is provided on the front side of the mounting cavity; The testing instrument is disposed within the mounting cavity and is used to connect to the testing fixture; The shielding box is located inside the mounting cavity and is directly opposite the operating port.

3. The new energy vehicle electronic BMS shielding test equipment according to claim 1, characterized in that, The support includes a fixed frame and a movable frame. The fixed frame is connected to the lower housing, and the movable frame is vertically and flexibly disposed on the upper side of the fixed frame. The test fixture includes a first fixture and a second fixture. The first fixture is disposed on the fixed frame, and the second fixture is disposed on the movable frame. The second fixture can be raised and lowered synchronously with the movable frame to engage or disengage with the second fixture. The locking components include a first locking component and a second locking component. The first locking component is used to lock the first fixture to the fixed frame, and the second locking component is used to lock the second fixture to the movable frame.

4. The new energy vehicle electronic BMS shielding test equipment according to claim 3, characterized in that, The fixing frame is provided with a support surface to support the first fixture. The bracket is provided with limit strips on the left and right sides of the first fixture to limit the first fixture to the left and right. In the locked state, the first locking member positions the first fixture and the fixing frame relative to each other in the front-back direction.

5. The new energy vehicle electronic BMS shielding test equipment according to claim 4, characterized in that, The supporting surface is provided with a vertically extending locking hole, and the first locking member includes: The fixing part is disposed on the first fixture; The movable part is vertically and movably mounted on the fixed part, and the top end of the movable part protrudes from the fixed part; An elastic portion is disposed between the fixed portion and the movable portion, and is used to apply a downward elastic force to the movable portion so that the movable portion can be partially inserted into the locking hole.

6. The new energy vehicle electronic BMS shielding test equipment according to claim 5, characterized in that, The fixing bracket is provided with an abutment portion on the rear side of the first fixture, the abutment portion being used to abut against the first fixture so that the movable portion is vertically aligned with the locking hole.

7. The new energy vehicle electronic BMS shielding test equipment according to claim 6, characterized in that, The top of the abutting part is provided with a boss, which is used to abut against the upper end of the first fixture to vertically limit the first fixture.

8. The new energy vehicle electronic BMS shielding test equipment according to claim 3, characterized in that, The movable frame is provided with front-to-back extending limiting grooves on the left and right sides of the second fixture, and the left and right ends of the second fixture are respectively embedded in the corresponding limiting grooves; wherein, in the locked state, the second locking member positions the second fixture and the movable frame relative to each other in the front-to-back direction.

9. The new energy vehicle electronic BMS shielding test equipment according to claim 8, characterized in that, The second locking element includes: The pressure block is vertically adjustable and is set on the movable frame. During the vertical movement of the pressure block, it can press the second fixture against the upper end face of the limiting groove, or separate the second fixture from the upper end face of the limiting groove.

10. The new energy vehicle electronic BMS shielding test equipment according to claim 9, characterized in that, The second locking element further includes: Adjusting screws, the adjusting screws being threaded onto the movable frame and vertically distributed; The movable frame is equipped with a guide structure to guide the vertical movement of the pressure block. The pressure block is threadedly connected to the adjusting screw. During the rotation of the adjusting screw, the pressure block can be driven to move vertically relative to the movable frame.

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