Insulation and voltage resistance test equipment for electric vehicle battery liquid cooling plate

Abstract

The utility model relates to insulation and voltage resistance testing equipment for a battery liquid cooling plate of an electric vehicle. The equipment is provided with a workpiece conveying system, a workpiece positioning and pressing device and a detection instrument, the workpiece conveying system is composed of a feeding part, a detecting part and a discharging part. The workpiece positioning and pressing device comprises a fixing frame, workpiece position adjusting mechanisms, a lower supporting mechanism and an upper pressing mechanism, the fixing frame is assembled with a detection portion of the workpiece conveying system, the workpiece position adjusting mechanisms are located on the front side and the rear side of the lower supporting mechanism and the front side and the rear side of the upper pressing mechanism, the lower supporting mechanism is provided with a supporting plate, and the upper pressing mechanism is provided with a clamping plate. The upper pressing mechanism is provided with a pressing plate; the detection instrument is connected with the supporting plate and the pressing plate through wires, and the supporting plate and the pressing plate are both made of conductive metal materials. According to the utility model, the automatic detection of the voltage-withstanding insulation performance of the liquid cooling plate is realized, and the purposes of improving the detection work efficiency, ensuring the reliability of the detection result and eliminating the hidden danger of safety production are achieved.

Description

Technical Field

[0001] The utility model relates to a detection device, in particular to an insulation withstand voltage performance test device for a liquid cooling plate of an electric vehicle battery. Background Art

[0002] New energy vehicle batteries generate a lot of heat during the charging and discharging process, causing the temperature to rise. When the battery temperature is too high, the battery life will be shortened and there is a risk of thermal runaway. Therefore, the research on battery cooling technology is one of the important measures to ensure the safety performance of the vehicle. At present, battery cooling technologies include air cooling, liquid cooling and phase change cooling, of which liquid cooling accounts for about 55%. Liquid cooling technology is to circulate the coolant in the liquid flow channel of the liquid cooling plate to remove heat, thereby achieving the cooling function. It can be seen that the liquid cooling plate is a key component of the liquid cooling system of new energy vehicle batteries. It must not only meet the performance requirements of flow resistance and airtightness, but also have safety guarantees such as leakage risk control, insulation protection, and flame retardancy.

[0003] In order to ensure the insulation performance of the liquid cooling plate, the method of spraying insulating powder on the contact area between the liquid cooling plate and the battery module is generally adopted, thereby forming an insulating layer in the contact area between the liquid cooling plate and the battery module, and also improving the adhesive force. In the quality control system of new energy vehicle battery manufacturers, according to the relevant technical standards, the liquid cooling plate sprayed with an insulating layer must be 100% subjected to insulation withstand voltage testing. However, in the prior art, most of the tests on the insulation withstand voltage performance of the liquid cooling plate are carried out manually by loading and unloading materials and positioning the workpiece, which not only has low work efficiency and difficulty in accurately positioning the workpiece, affecting the reliability of the test results, but also poses hidden dangers in production safety. Utility Model Content

[0004] The utility model provides an insulation withstand voltage performance testing device for an electric vehicle battery liquid cooling plate, and aims to realize the detection of the withstand voltage insulation performance of the liquid cooling plate through the cooperation of an automatically controlled workpiece conveying system, a workpiece positioning and clamping device, and a detection instrument, so as to improve the detection efficiency, ensure the reliability of the detection results, and eliminate the hidden dangers of production safety.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A test device for the insulation and withstand voltage performance of a liquid cooling plate of an electric vehicle battery, comprising a workpiece conveying system, a workpiece positioning and clamping device and a detection instrument; the workpiece conveying system is fixed on a horizontal ground and is a three-section structure, consisting of a feeding part, a detection part and a unloading part; the workpiece positioning and clamping device comprises a fixed frame and a workpiece position adjustment mechanism, a lower supporting mechanism and an upper clamping mechanism arranged in the fixed frame, the fixed frame is equipped with the detection part of the workpiece conveying system, the workpiece position adjustment mechanism consists of two symmetrically arranged parts, which are located at the front and rear sides of the lower supporting mechanism and the upper clamping mechanism, the lower supporting mechanism is provided with a supporting plate matched with one side of the liquid flow channel of the liquid cooling plate, and the upper clamping mechanism is provided with a pressing plate opposite to the insulating layer area of ​​the liquid cooling plate; the detection instrument is connected to the supporting plate of the lower supporting mechanism and the pressing plate of the upper clamping mechanism respectively through wires, and the supporting plate and the pressing plate are both made of conductive metal.

[0007] The above-mentioned insulation and voltage withstand performance testing equipment for the liquid cooling plate of the battery of an electric vehicle, each part of the workpiece position adjustment mechanism is provided with a position adjustment cylinder, a push plate, a push plate guide assembly and a position adjustment cylinder seat; the position adjustment cylinder seat is installed on a fixed frame; the position adjustment cylinder is installed on the position adjustment cylinder seat, and a push plate is fixedly installed at the end of its telescopic arm; the push plate guide assembly is symmetrically arranged on the left and right sides of the position adjustment cylinder, and includes a push plate guide rod and a push plate guide sleeve, the push plate guide rod is sleeved in the push plate guide sleeve in a clearance fit manner, the push plate guide rod is fixedly connected to the push plate, and the push plate guide sleeve is fixed on the position adjustment cylinder seat.

[0008] The above-mentioned insulation and voltage withstand performance testing equipment for the liquid cooling plate of the battery of an electric vehicle, the lower supporting mechanism has several groups of supporting plates, and a supporting plate lifting unit is provided under each group of supporting plates, the supporting plate lifting unit comprises a supporting plate lifting cylinder, a supporting plate lifting cylinder seat and a supporting plate lifting guide assembly; the supporting plate lifting cylinder is fixedly assembled with a supporting chassis installed on the detection part of the workpiece conveying system through the supporting plate lifting cylinder seat, and the telescopic arm of the supporting plate lifting cylinder is connected to the supporting plate; the supporting plate lifting guide assembly comprises a supporting plate lifting guide rod and a supporting plate lifting guide sleeve, the supporting plate lifting guide rod is sleeved in the supporting plate lifting guide sleeve in a clearance fit manner, the supporting plate lifting guide rod is fixedly connected to the supporting plate, and the supporting plate lifting guide sleeve is fixed on the supporting plate lifting cylinder seat.

[0009] The above-mentioned insulation and withstand voltage performance testing equipment for electric vehicle battery liquid cooling plates, the lower support mechanism is also provided with a workpiece limiting support plate, the workpiece limiting support plate is located at the front end of the workpiece feeding direction, is "L" shaped, and a support plate lifting unit is arranged below its horizontal wall.

[0010] The above-mentioned insulation and pressure resistance performance testing equipment for the liquid cooling plate of the battery of the electric vehicle, the number of pressure plates in the upper clamping mechanism matches the contact area of ​​the battery module on the liquid cooling plate, and a pressure plate lifting cylinder, a pressure plate lifting cylinder seat, a pressure plate lifting guide assembly and a profile bracket are arranged above each pressure plate; the pressure plate lifting cylinder is assembled with the profile bracket installed in the fixed frame through the pressure plate lifting cylinder seat, and the telescopic arm of the pressure plate lifting cylinder is fixedly assembled with the pressure plate; the pressure plate lifting guide assembly includes a pressure plate lifting guide rod and a pressure plate lifting guide sleeve, the pressure plate lifting guide rod is sleeved in the pressure plate lifting guide sleeve in a clearance fit manner, the pressure plate lifting guide rod is fixedly connected to the pressure plate, and the pressure plate lifting guide sleeve is fixed on the pressure plate lifting cylinder seat.

[0011] In the above-mentioned insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plates, the pressing plates in the upper pressing mechanism are connected in series via wires.

[0012] The above-mentioned insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plates is provided with conductive foam on the bottom surface of the pressing plate.

[0013] The above-mentioned insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plates is also provided with a PLC control system. The controller of the PLC control system is installed on a fixed frame, and an alarm light is arranged on the top of the controller; the controller is communicatively connected with the control elements in the detection instrument and the workpiece positioning and clamping device, and a display screen and operation buttons are arranged on the controller panel.

[0014] The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plates has protective plates installed on both side facades, the rear facade and the top of the fixed frame, and a double-door on the front facade of the fixed frame.

[0015] The above-mentioned insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plates, the workpiece conveying system adopts a motor-driven roller conveying method, and the roller is an insulating roller.

[0016] The utility model provides an insulation withstand voltage performance test device for electric vehicle battery liquid cooling plates, which can complete the automatic loading and unloading operation of the tested battery liquid cooling plate through the cooperation of the PLC control system and the workpiece conveying system, and can automatically complete the workpiece position adjustment and clamping action through the workpiece positioning and clamping device under the command of the PLC control system, and then the detection instrument tests the workpiece, sends the detection result signal through the alarm light, and the operator can perform subsequent processing on qualified and unqualified workpieces according to the signal sent by the alarm light. It can be seen that the utility model realizes the automatic detection of the withstand voltage insulation performance of the liquid cooling plate through the cooperation of the workpiece conveying system, the workpiece positioning and clamping device and the detection instrument, and achieves the purpose of improving the detection work efficiency, ensuring the reliability of the detection results, and eliminating safety production hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plates according to the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the workpiece conveying system;

[0019] Figure 3 is a schematic diagram of the structure of the workpiece positioning and clamping device (for the sake of clarity, the fixed frame is not shown in the figure);

[0020] Figure 4 It is a schematic diagram of the workpiece position adjustment mechanism;

[0021] Figure 5 is a schematic diagram of the lower support mechanism;

[0022] Figure 6 Schematic diagram of the upper clamping mechanism;

[0023] Figure 7 It is a schematic diagram of the connection between the testing instrument and the upper pressing mechanism, the lower supporting mechanism, and the display screen;

[0024] Figure 8 It is a schematic diagram of the working status of the liquid cooling plate insulation withstand voltage performance testing equipment.

[0025] Explanation of the symbols in the figure:

[0026] 1 is a workpiece conveying system, 1-1 is a loading part, 1-2 is a detection part, 1-3 is a unloading part, and 1-4 is an insulating roller;

[0027] 2 is the workpiece positioning and clamping device

[0028] 2-1 is a workpiece position adjustment mechanism, 2-1-1 is a position adjustment cylinder, 2-1-2 is a push plate, 2-1-3 is a push plate guide assembly, 2-1-3-1 is a push plate guide sleeve, 2-1-3-2 is a push plate guide rod, and 2-1-4 is a position adjustment cylinder seat;

[0029] 2-2 is the lower support mechanism, 2-2-1 is the support plate lifting cylinder, 2-2-2 is the support plate lifting guide assembly, 2-2-2-1 is the support plate lifting guide sleeve, 2-2-2-2 is the support plate lifting guide rod, 2-2-3 is the support plate lifting cylinder seat, 2-2-4 is the support plate, and 2-2-5 is the workpiece limit support plate;

[0030] 2-3 is the upper clamping mechanism, 2-3-1 is the pressing plate lifting cylinder, 2-3-2 is the pressing plate lifting guide assembly, 2-3-2-1 is the pressing plate lifting guide sleeve, 2-3-2-2 is the pressing plate lifting guide rod, 2-3-3 is the pressing plate lifting cylinder seat, 2-3-5 is the profile bracket, and 2-3-6 is the conductive foam;

[0031] 2-4 is a fixed frame, 2-4-1 is a protective plate, and 2-4-2 is a double door;

[0032] 3 is a testing instrument;

[0033] 4 is a conductor;

[0034] 5 is a controller;

[0035] 6 is the warning light;

[0036] 7 is a liquid cooling plate. DETAILED DESCRIPTION

[0037] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] See Figure 1. Figure 2 , Figure 3 , Figure 7 , Figure 8 The utility model provides an insulation withstand voltage performance test device for an electric vehicle battery liquid cooling plate, which is provided with a workpiece conveying system 1, a workpiece positioning and clamping device 2 and a detection instrument 3; the workpiece conveying system 1 is fixed on a horizontal ground, and adopts a roller conveying method driven by a motor, and the roller is an insulating roller 1-4. The workpiece conveying system 1 is a three-section structure, consisting of a feeding part 1-1, a detection part 1-2 and a unloading part 1-3; the workpiece positioning and clamping device 2 includes a fixed frame 2-4 and a workpiece position adjustment mechanism 2-1, a lower support mechanism 2-2, and an upper clamping mechanism 2-3 arranged in the fixed frame 2-4. The fixed frame 2-4 is a rectangular frame, and the fixed frame 2-4 and the workpiece conveying system The detection part 1-2 of 1 is equipped, and protective plates 2-4-1 are installed on the two side facades, the rear facade and the top of the fixed frame 2-4, and a double-door 2-4-2 is provided on the front facade of the fixed frame 2-4; the lower support mechanism 2-2 is provided with a support plate 2-2-4 that cooperates with one side of the liquid flow channel of the liquid cooling plate 7, and the upper clamping mechanism 2-3 is provided with a pressure plate 2-3-4 opposite to the insulating layer area of ​​the liquid cooling plate; the detection instrument 3 is placed on the top of the fixed frame 2-4, and the detection instrument 3 is connected to the support plate 2-2-4 of the lower support mechanism 2-2 and the pressure plate 2-3-4 of the upper clamping mechanism 2-3 through a wire 4, and the support plate 2-2-4 and the pressure plate 2-3-4 are both made of conductive metal.

[0039] See also Figure 3 , Figure 4 The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate described in the utility model, its workpiece position adjustment mechanism 2-1 is composed of two symmetrically arranged parts, located at the front and rear sides of the lower support mechanism 2-2 and the upper clamping mechanism 2-3, each of which is provided with a position adjustment cylinder 2-1-1, a push plate 2-1-2, a push plate guide assembly 2-1-3 and a position adjustment cylinder seat 2-1-4; the position adjustment cylinder seat 2-1-4 is installed on the fixed frame 2-4; the position adjustment cylinder 2-1-1 is installed on the position adjustment cylinder seat 2-1 ... A push plate 2-1-2 is fixedly mounted on the cylinder seat 2-1-4 at the end of its telescopic arm; the push plate guide assembly 2-1-3 is symmetrically arranged on the left and right sides of the position adjustment cylinder 2-1-1, including a push plate guide rod 2-1-3-2 and a push plate guide sleeve 2-1-3-1, the push plate guide rod 2-1-3-2 is sleeved in the push plate guide sleeve 2-1-3-1 in a clearance fit manner, the push plate guide rod 2-1-3-2 is fixedly connected to the push plate 2-1-2, and the push plate guide sleeve 2-1-3-1 is fixed on the position adjustment cylinder seat 2-1-4.

[0040] See also Figure 3 , Figure 5 The insulation withstand voltage performance testing equipment for the liquid cooling plate of the battery of an electric vehicle described in the utility model has four groups of support plates 2-2-4 in the lower support mechanism 2-2, and a support plate lifting unit is provided under each group of support plates 2-2-4, and the support plate lifting unit includes a support plate lifting cylinder 2-2-1, a support plate lifting cylinder seat 2-2-3 and a support plate lifting guide assembly 2-2-2; the support plate lifting cylinder 2-2-1 is fixedly assembled with a support base frame 2-2-6 installed on the detection part 1-2 of the workpiece conveying system 1 through the support plate lifting cylinder seat 2-2-3, and the telescopic arm of the support plate lifting cylinder 2-2-1 is connected to the support plate 2-2-4; the support plate lifting guide assembly 2-2-2 includes A support plate lifting guide rod 2-2-2-2 and a support plate lifting guide sleeve 2-2-2-1, the support plate lifting guide rod 2-2-2-2 is installed in the support plate lifting guide sleeve 2-2-2-1 in a clearance fit manner, the support plate lifting guide rod 2-2-2-2 is fixedly connected to the support plate 2-2-4, and the support plate lifting guide sleeve 2-2-2-1 is fixed on the support plate lifting cylinder seat 2-2-3; in a preferred embodiment of the utility model, the lower support mechanism 2-2 is also provided with a workpiece limiting support plate 2-2-5, the workpiece limiting support plate 2-2-5 is located at the front end in the workpiece feeding direction, and is "L" shaped, and a support plate lifting unit with the same structure as the support plate is arranged below its horizontal wall.

[0041] See also Figure 3 , Figure 6The insulation withstand voltage performance test equipment for electric vehicle battery liquid cooling plate described in the utility model has the number of pressure plates 2-3-4 in the upper pressing mechanism 2-3 matching the contact area of ​​the battery module on the liquid cooling plate 7, and the bottom surface of the pressure plate 2-3-4 is provided with a conductive foam 2-3-6, and a pressure plate lifting cylinder 2-3-1, a pressure plate lifting cylinder seat 2-3-3, a pressure plate lifting guide assembly 2-3-2 and a profile bracket 2-3-5 are arranged above each pressure plate 2-3-4; the pressure plate lifting cylinder 2-3-1 is connected to the fixed frame 2 through the pressure plate lifting cylinder seat 2-3-3. -4 is assembled with the profile bracket 2-3-5, and the telescopic arm of the pressure plate lifting cylinder 2-3-1 is fixedly assembled with the pressure plate 2-3-4; the pressure plate lifting guide assembly 2-3-2 includes a pressure plate lifting guide rod 2-3-2-2 and a pressure plate lifting guide sleeve 2-3-2-1, and the pressure plate lifting guide rod 2-3-2-2 is sleeved in the pressure plate lifting guide sleeve 2-3-2-1 in a clearance fit manner, and the pressure plate lifting guide rod 2-3-2-2 is fixedly connected with the pressure plate 2-3-4, and the pressure plate lifting guide sleeve 2-3-2-1 is fixed on the pressure plate lifting cylinder seat 2-3-3.

[0042] See also Figures 1 to 8When the utility model is used to test the withstand voltage performance of the insulation of the liquid cooling plate of the battery of a new energy vehicle, firstly, the workpiece position adjustment mechanism 2-1, the upper clamping mechanism 2-3 and the lower support mechanism 2-2 of the workpiece positioning and clamping device 2 are adjusted to the initial position, and the PLC control system and the electrical system are debugged; the liquid cooling plate 7 workpiece to be tested is placed on the loading part 1-1 of the workpiece conveying system 1, and the equipment is started by the operation button on the controller 5; the workpiece conveying system 1 is operated to convey the liquid cooling plate 7 workpiece to the detection part 1-2, and the liquid cooling plate 7 workpiece is limited by the workpiece limiting support plate 2-2-5 of the lower support mechanism 2-2 to prevent the liquid cooling plate 7 workpiece from being further conveyed forward; then, the telescopic arms of several groups of support plate lifting cylinders 2-2-1 of the lower support mechanism 2-2 are extended at the same time, and the liquid cooling plate 7 workpiece is steadily lifted up to the set height by the support plate 2-2-4; the telescopic arms of two groups of position adjustment cylinders 2-1-1 in the workpiece position adjustment mechanism 2-1 are simultaneously extended. When extended, the liquid cooling plate 7 workpiece is positioned by the push plates 2-1-2 on both sides so that its central axis coincides with the central axis of the workpiece conveying system; then the telescopic arms of several groups of pressing plate lifting cylinders 2-3-1 of the upper clamping mechanism 2-3 are simultaneously extended by a set distance, driving the pressing plate 2-3-4 to move downward, so that the conductive foam 2-3-6 on the bottom of the pressing plate 2-3-4 presses the spraying areas on the upper surface of the liquid cooling plate 7 workpiece; the automatic detection program of the detection instrument 3 is started and the detection result value appears on the display screen of the controller 5, and the alarm light 6 flashes at the same time. When the detection result is qualified, the alarm light 6 flashes green; when the detection result is unqualified, the alarm light 6 flashes red; the test operation of the liquid cooling plate 7 workpiece is completed, the workpiece position adjustment mechanism 2-1, the upper clamping mechanism 2-3, and the lower support mechanism 2-2 in the workpiece positioning and clamping device 2 are reset, and the liquid cooling plate 7 workpiece is transferred to the unloading part 1-3 by the workpiece conveying system 1, and the operator performs subsequent processing according to the test result.

[0043] The utility model can also be used for insulation performance detection of other similar workpieces.

Claims

1. An insulation withstand voltage performance test equipment for electric vehicle battery liquid cooling plate, characterized in that: It is provided with a workpiece conveying system (1), a workpiece positioning and clamping device (2) and a detection instrument (3); the workpiece conveying system (1) is fixed on a horizontal ground and is a three-section structure, consisting of a loading part (1-1), a detection part (1-2) and a unloading part (1-3); the workpiece positioning and clamping device (2) comprises a fixed frame (2-4) and a workpiece position adjustment mechanism (2-1) arranged in the fixed frame (2-4), a lower support mechanism (2-2) and an upper clamping mechanism (2-3); the fixed frame (2-4) is assembled with the detection part (1-2) of the workpiece conveying system (1); the workpiece position adjustment mechanism (2-1) is composed of a symmetrical The apparatus is composed of two parts arranged at the front and rear sides of a lower support mechanism (2-2) and an upper pressing mechanism (2-3), wherein the lower support mechanism (2-2) is provided with a support plate (2-2-4) cooperating with one side of a liquid flow channel of a liquid cooling plate (7), and the upper pressing mechanism (2-3) is provided with a pressing plate (2-3-4) opposite to an insulating layer area of ​​the liquid cooling plate; the detection instrument (3) is respectively connected to the support plate (2-2-4) of the lower support mechanism (2-2) and the pressing plate (2-3-4) of the upper pressing mechanism (2-3) through a wire (4), and the support plate (2-2-4) and the pressing plate (2-3-4) are both made of conductive metal.

2. The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate according to claim 1, characterized in that: Each part of the workpiece position adjustment mechanism (2-1) is provided with a position adjustment cylinder (2-1-1), a push plate (2-1-2), a push plate guide assembly (2-1-3) and a position adjustment cylinder seat (2-1-4); the position adjustment cylinder seat (2-1-4) is mounted on a fixed frame (2-4); the position adjustment cylinder (2-1-1) is mounted on the position adjustment cylinder seat (2-1-4), and the push plate (2-1-2) is fixedly mounted at the end of the telescopic arm; the push plate guide assembly The components (2-1-3) are symmetrically arranged on the left and right sides of the position adjustment cylinder (2-1-1), and include a push plate guide rod (2-1-3-2) and a push plate guide sleeve (2-1-3-1); the push plate guide rod (2-1-3-2) is sleeved in the push plate guide sleeve (2-1-3-1) in a clearance fit manner; the push plate guide rod (2-1-3-2) is fixedly connected to the push plate (2-1-2); and the push plate guide sleeve (2-1-3-1) is fixed on the position adjustment cylinder seat (2-1-4).

3. The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate according to claim 1 or 2, characterized in that: The lower support mechanism (2-2) includes a plurality of groups of support plates (2-2-4), and a support plate lifting unit is provided below each group of support plates (2-2-4). The support plate lifting unit includes a support plate lifting cylinder (2-2-1), a support plate lifting cylinder seat (2-2-3), and a support plate lifting guide assembly (2-2-2). The support plate lifting cylinder (2-2-1) is fixedly assembled with a support base frame (2-2-6) installed on a detection portion (1-2) of a workpiece conveying system (1) via a support plate lifting cylinder seat (2-2-3). -2-1) is connected to a support plate (2-2-4); the support plate lifting guide assembly (2-2-2) comprises a support plate lifting guide rod (2-2-2-2) and a support plate lifting guide sleeve (2-2-2-1); the support plate lifting guide rod (2-2-2-2) is sleeved in the support plate lifting guide sleeve (2-2-2-1) in a clearance fit manner; the support plate lifting guide rod (2-2-2-2) is fixedly connected to the support plate (2-2-4); and the support plate lifting guide sleeve (2-2-2-1) is fixed on a support plate lifting cylinder seat (2-2-3).

4. The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate according to claim 3 is characterized in that: The lower support mechanism (2-2) is further provided with a workpiece limiting support plate (2-2-5), the workpiece limiting support plate (2-2-5) is located at the front end in the workpiece feeding direction and is in an "L" shape, and a support plate lifting unit is provided below the horizontal wall thereof.

5. The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate according to claim 4 is characterized in that: The number of the pressure plates (2-3-4) in the upper clamping mechanism (2-3) matches the contact area of ​​the battery modules on the liquid cooling plate (7), and a pressure plate lifting cylinder (2-3-1), a pressure plate lifting cylinder seat (2-3-3), a pressure plate lifting guide assembly (2-3-2) and a profile bracket (2-3-5) are arranged above each pressure plate (2-3-4); the pressure plate lifting cylinder (2-3-1) is assembled with the profile bracket (2-3-5) installed in the fixed frame (2-4) through the pressure plate lifting cylinder seat (2-3-3); The telescopic arm of the pressure plate (2-3-1) is fixedly assembled with the pressure plate (2-3-4); the pressure plate lifting guide assembly (2-3-2) comprises a pressure plate lifting guide rod (2-3-2-2) and a pressure plate lifting guide sleeve (2-3-2-1); the pressure plate lifting guide rod (2-3-2-2) is sleeved in the pressure plate lifting guide sleeve (2-3-2-1) in a clearance fit manner; the pressure plate lifting guide rod (2-3-2-2) is fixedly connected to the pressure plate (2-3-4); and the pressure plate lifting guide sleeve (2-3-2-1) is fixed on the pressure plate lifting cylinder seat (2-3-3).

6. The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate according to claim 5, characterized in that: The pressing plates (2-3-4) in the upper pressing mechanism (2-3) are connected in series via a wire (4).

7. The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate according to claim 6, characterized in that: A conductive foam (2-3-6) is provided on the bottom surface of the pressing plate (2-3-4).

8. The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate according to claim 7, characterized in that: It is also provided with a PLC control system, wherein a controller (5) of the PLC control system is mounted on a fixed frame (2-4), and an alarm light (6) is arranged on the top of the controller (5); the controller (5) is communicatively connected with a control element in a detection instrument (3) and a workpiece positioning and clamping device, and a display screen and operation buttons are arranged on a panel of the controller (5).

9. The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate according to claim 8, characterized in that: Protective plates (2-4-1) are installed on both side facades, the rear facade and the top of the fixed frame (2-4), and a double-leaf door (2-4-2) is provided on the front facade of the fixed frame (2-4).

10. The insulation withstand voltage performance testing equipment for electric vehicle battery liquid cooling plate according to claim 8, characterized in that: The workpiece conveying system (1) adopts a roller conveying method driven by a motor, and the rollers are insulating rollers (1-4).

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