A module end plate PACK extrusion test device

Abstract

The utility model belongs to the composite material test technical field especially relates to a module end plate PACK extrusion test device, including base body, the two -way top pressure device of setting on base body, both ends of two -way top pressure device are connected pressure sensor respectively, the both ends of base body are supported and are equipped with the top pressure plate subassembly, top pressure plate subassembly is located pressure sensor's outside, the outside of top pressure plate subassembly is test end plate, and the test end plate between both sides is equipped with the restraint belt subassembly, the restraint belt subassembly is used for the spacing of test end plate and provides the top pressure resistance, the utility model provides a module end plate PACK extrusion test device, the utility model has the test characteristics such as quick installation, convenient operation, short preparation time, safe and accurate, good practicality.

Description

Technical Field

[0001] This utility model belongs to the field of composite material testing technology, and specifically relates to a module end plate PACK extrusion testing device. Background Technology

[0002] A battery module is a key intermediate component in a battery system. It is assembled from multiple battery cells (individual cells) connected in series or parallel, designed to provide higher voltage and capacity to meet the power requirements of specific applications. Battery modules are not only the foundation of battery packs, but also an indispensable part of electric vehicles, energy storage systems, electronic devices, industrial equipment, aerospace, and other fields.

[0003] The module end plates are located at both ends of the battery module. They apply a certain grouping force to the large surface of the cell through steel strips and PET packaging straps to constrain cell expansion and effectively protect the cell in the event of vibration or impact.

[0004] The PACK extrusion test for module end plates is used to simulate the extrusion resistance of the end plates when the battery cells expand. Currently, jack-type equipment is commonly used for this test, but this has the following problems:

[0005] 1. The jack is a unidirectional ejection device, so it is difficult to guarantee the initial stress on both sides of the jack relative to the end plate during testing.

[0006] 2. During test preparation, it is often necessary to add pads to compensate for insufficient distance, which makes the operation difficult and also creates safety hazards.

[0007] 3. The base of the jack is generally large. In order to keep the two sides of the jack at the same level, it is necessary to install pads under the jack. This results in the jack not having a safe support surface, which creates a safety hazard during the test.

[0008] 4. When testing the ultimate stress of end plate failure or damage, the jack method is not accurate. In addition, the equipment is dangerous and it is difficult for personnel to observe it at close range. Summary of the Invention

[0009] This invention provides a module end plate PACK extrusion testing device, which can solve the problems pointed out in the background art.

[0010] A module end plate PACK extrusion testing device includes a base body; a bidirectional pressing device disposed on the base body, with pressure sensors connected to both ends of the bidirectional pressing device; pressing plate assemblies supported at both ends of the base body, the pressing plate assemblies being located outside the pressure sensors; the outer side of the pressing plate assemblies being a test end plate; and a restraining strap assembly between the two test end plates, the restraining strap assembly being used to limit the test end plates and provide pressing resistance.

[0011] Preferably, the top pressure plate assembly includes an inner circular steel plate located on the inner side and an outer rectangular steel plate located on the outer side. The inner circular steel plate matches the shape of the pressure sensor, and the outer rectangular steel plate matches the shape of the test end plate.

[0012] Preferably, the two ends of the base body are respectively provided with support and limiting members for the top pressure plate assembly, and the upper part of the support and limiting member is provided with an arc-shaped limiting groove.

[0013] Preferably, the restraint strap assembly includes an upper PET plastic steel strap and a lower steel strap.

[0014] Preferably, the base body includes a fixed base and an adjustable base that is detachably connected to both ends of the fixed base, and the adjustable base is provided with a support limiting member.

[0015] Preferably, the fixed base is provided with a plurality of limiting grooves for limiting the bidirectional pressing device and a limiting frame.

[0016] Preferably, the limiting frame includes two gantry frames, each gantry frame including two limiting vertical frames and a limiting horizontal frame detachably connected between the two limiting vertical frames by bolts.

[0017] Preferably, the fixed base has an embedding groove at each end, and the adjustable base is embedded in the embedding groove.

[0018] Preferably, the bidirectional pressing device is a bidirectional hydraulic cylinder.

[0019] Beneficial effects: This utility model provides a module end plate PACK extrusion test device, which has the characteristics of quick installation, convenient operation, short preparation time, safety and accuracy, and good practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the upper side of the base of this utility model.

[0022] Figure 3 This is a schematic diagram of the lower side of the base of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] The diagram shows the following components: Base body 1; Support and limiting component 11; Arc-shaped limiting groove 12; Fixed seat body 13; Adjustable seat body 14; Limiting groove 15; Limiting frame 16; Limiting vertical frame 161; Limiting horizontal frame 162; Embedded groove 17; Bidirectional top pressure device 2; Pressure sensor 3; Top pressure plate assembly 4; Inner circular steel plate 41; Outer rectangular steel plate 42; Test end plate 5; Restraint strap assembly 6; PET plastic steel strap 61; Steel strap 62. Detailed Implementation

[0025] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0026] Example: Figure 1-2 As shown in the figure, the present invention provides a module end plate PACK extrusion test device, including a base body 1; a bidirectional pressing device 2 disposed on the base body 1, wherein the bidirectional pressing device 2 can be a bidirectional hydraulic cylinder, and pressure sensors 3 are respectively connected to both ends of the bidirectional pressing device 2. Both ends of the push rod of the bidirectional hydraulic cylinder are provided with threads, and the pressure sensors 3 are installed on the push rods through the threads. The pressure sensors can be of the 10KN class, and the bidirectional hydraulic cylinder is of the 10T class.

[0027] The base body 1 is supported at both ends by a top pressure plate assembly 4. The top pressure plate assembly 4 is located outside the pressure sensor 3. The outer side of the top pressure plate assembly 4 is a test end plate 5. A restraint strap assembly 6 is provided between the two test end plates 5. The restraint strap assembly 6 is used to limit the test end plate 5 and provide top pressure resistance.

[0028] Specifically, the top pressure plate assembly 4 includes an inner circular steel plate 41 located on the inner side and an outer rectangular steel plate 42 located on the outer side. The inner circular steel plate 41 matches the shape of the pressure sensor 3, and the outer rectangular steel plate 42 matches the shape of the test end plate 5. The thickness of the outer rectangular steel plate 42 can be 8-10mm, and its shape is close to or matches that of the test end plate 5. The outer rectangular steel plate 42 contacts the test end plate 5, simulating the contact between the battery cell and the test end plate 5. The thickness of the inner circular steel plate 41 can be 30-50mm.

[0029] Specifically, the base body 1 has support and limiting members 11 for the top pressure plate assembly 4 at both ends, and an arc-shaped limiting groove 12 is provided above the support and limiting member 11.

[0030] Specifically, the restraint strap assembly 6 includes an upper PET plastic steel strap 61 and a lower steel strap 62. The upper PET plastic steel strap 61 and the lower steel strap 62 are fitted onto the test end plates 5 at both ends to limit the position and provide top pressure resistance.

[0031] Specifically, the base body 1 includes a fixed base body 13 and an adjustable base body 14 detachably connected to both ends of the fixed base body 13. The adjustable base body 14 is provided with a support and limiting member 11. The two ends of the fixed base body 13 are respectively provided with an insertion groove 17. The adjustable base body 14 is inserted and connected to the insertion groove 17. The specifications of the adjustable base body 14 can be changed as needed to meet the testing requirements.

[0032] The fixed base 13 is provided with a plurality of limiting grooves 15 for limiting the bidirectional pressing device 2 and a limiting frame 16. Specifically, the limiting frame 16 includes gantry frames on both sides, the gantry frames include limiting upright frames 161 on both sides and limiting horizontal frames 162 that are detachably connected between the limiting upright frames 161 on both sides by bolts.

[0033] The testing steps for this utility model are as follows:

[0034] (1) Prepare all the components required for the extrusion test device.

[0035] (2) Place the fixed base 13 on the plane, fix the bidirectional pressing device 2 on the fixed base 13 and install the pressure sensor 3.

[0036] (3) Select a suitable adjustable seat 14, and the adjustable seat 14 is partially embedded in the fixed seat 13.

[0037] (4) Place the top pressure plate assembly 4 on the support limit member 11 of the adjustable seat 14, and fix the test end plate 5 to the adjustable seat 14 with bolts according to the actual assembly method.

[0038] (5) Install the restraint strap assembly 6 onto the test end plate 5.

[0039] (6) Operate the controller. The controller can be based on a microcontroller or PLC to control the bidirectional pressing device 2 and receive and process the pressure value feedback from the pressure sensor 3. Control the bidirectional pressing device 2 to slowly increase the pressure to 500KG, record the distance value of the test end plate 5, and then slowly increase the pressure to 5000-5100KG at a speed of 10-20KG / s, maintain the pressure for 10s, and record the distance value of the test end plate 5 again. Observe whether the structure of the test end plate 5 is cracked, whether the restraint strap assembly 6 slips off, and whether the contact surface between the restraint strap assembly 6 and the test end plate 5 collapses.

[0040] (7) If there is no cracking, slippage, collapse or other phenomena, continue to apply pressure until the test end plate 5 is damaged or the overall structure fails. Record the maximum applied pressure and process data. This is the destructive stress.

[0041] (8) The bidirectional pressing device 2 of the operation controller gradually returns to its original position, and the corresponding disassembly is carried out to complete this test.

[0042] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A module end plate PACK extrusion testing device, characterized in that: Includes a base body (1); a bidirectional pressing device (2) disposed on the base body (1), the two ends of the bidirectional pressing device (2) are respectively connected to pressure sensors (3), the two ends of the base body (1) are respectively supported by pressing plate assemblies (4), the pressing plate assembly (4) is located outside the pressure sensor (3), the outside of the pressing plate assembly (4) is a test end plate (5), and a restraint strap assembly (6) is provided between the two test end plates (5), the restraint strap assembly (6) is used to limit the test end plate (5) and provide pressing resistance.

2. The module end plate PACK extrusion testing device according to claim 1, characterized in that: The top pressure plate assembly (4) includes an inner circular steel plate (41) located on the inner side and an outer rectangular steel plate (42) located on the outer side. The inner circular steel plate (41) matches the shape of the pressure sensor (3), and the outer rectangular steel plate (42) matches the shape of the test end plate (5).

3. The module end plate PACK extrusion testing device according to claim 2, characterized in that: The base body (1) has support limiting members (11) for the top pressure plate assembly (4) at both ends, and an arc-shaped limiting groove (12) is provided above the support limiting member (11).

4. The module end plate PACK extrusion testing device according to claim 1, characterized in that: The restraint strap assembly (6) includes an upper PET plastic steel strap (61) and a lower steel strap (62).

5. A module end plate PACK extrusion testing device according to any one of claims 1-4, characterized in that: The base body (1) includes a fixed base body (13) and an adjustable base body (14) detachably connected to both ends of the fixed base body (13). The adjustable base body (14) is provided with a support limiting member (11).

6. The module end plate PACK extrusion testing device according to claim 5, characterized in that: The fixed base (13) is provided with several limiting grooves (15) for limiting the bidirectional pressing device (2) and a limiting frame (16).

7. The module end plate PACK extrusion testing device according to claim 6, characterized in that: The limiting frame (16) includes two gantry frames, each including a limiting vertical frame (161) on both sides and a limiting horizontal frame (162) that is detachably connected between the two limiting vertical frames (161) by bolts.

8. The module end plate PACK extrusion testing device according to claim 5, characterized in that: The fixed base (13) has an embedding groove (17) at both ends, and the adjustable base (14) is embedded in the embedding groove (17).

9. A module end plate PACK extrusion testing device according to any one of claims 1-4, characterized in that: The bidirectional pressing device (2) is a bidirectional hydraulic cylinder.

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