Battery extrusion test fixture

Abstract

The utility model provides a kind of extrusion test tool of battery, including upper pressing plate, lower pressing plate, clamping unit and stop unit. When upper pressing plate and lower pressing plate are close, the both ends of stop unit can respectively resist upper pressing plate and lower pressing plate, to limit the distance of approaching between upper pressing plate and lower pressing plate, limit extrusion stroke. By stop unit directly to upper pressing plate and lower pressing plate is positioned, there is no delay, so as to effectively guarantee the accuracy of extrusion stroke. Stop unit is configured as the length of opposite direction is adjustable, to be able to adjust the distance of approaching between upper pressing plate and lower pressing plate, adjust the stroke of extrusion, so as to adapt to the extrusion test of battery of different sizes. By adjustable length stop unit to limit the extrusion stroke of extrusion tool, the limitation of extrusion stroke of entity stop unit does not exist time delay, so as to guarantee the accuracy of extrusion test to different size battery.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, specifically to a battery compression testing fixture. Background Technology

[0002] As a core component in the new energy field, the safety of power batteries is a major concern. Among these tests, the crush test is an important method for simulating the deformation of batteries caused by external forces during vehicle operation or transportation.

[0003] In related technologies, during battery compression testing, sensors and other structures provide feedback on the movement of the compression fixture, enabling testing of batteries of different sizes on the fixture. However, the cutoff condition is usually a stop in displacement or force, but there is a certain delay between the device's compression head indicating a need to stop and the device actually stopping. This delay often results in the compression stroke exceeding the set limit, leading to over-compression of the battery and affecting the test results. Utility Model Content

[0004] The present invention provides a battery compression testing fixture, which limits the compression stroke of the fixture by means of an adjustable length stop unit. The physical stop unit limits the compression stroke without time delay, thereby ensuring the accuracy of compression testing of batteries of different sizes.

[0005] This utility model provides a battery compression testing fixture, including an upper pressure plate, a lower pressure plate, a clamping unit, and a stop unit. The upper pressure plate and the lower pressure plate are arranged opposite to each other and can move closer to and further away from the lower pressure plate in a relative direction. The clamping unit is disposed on the upper pressure plate and the lower pressure plate. The clamping unit is used to clamp the two ends of the battery so as to compress the battery when the upper pressure plate and the lower pressure plate are close together. The stop unit is disposed between the upper pressure plate and the lower pressure plate so that when the upper pressure plate and the lower pressure plate are close together, the two ends of the stop unit can respectively abut against the upper pressure plate and the lower pressure plate. The stop unit is configured to have an adjustable length in the relative direction so as to adjust the distance between the upper pressure plate and the lower pressure plate when they are close together.

[0006] The above-mentioned technical features have at least the following advantages and beneficial effects: When the upper and lower pressure plates approach each other, the clamping unit compresses both ends of the battery for compression testing. As the upper and lower pressure plates approach, the stop unit's ends abut against them respectively, limiting the distance between them and thus restricting the compression stroke. The stop unit directly limits the movement of the upper and lower pressure plates without delay, effectively ensuring the accuracy of the compression stroke. The stop unit is designed with an adjustable length in the relative direction, allowing adjustment of the distance between the upper and lower pressure plates and thus the compression stroke, adapting to compression testing of batteries of different sizes. The adjustable-length stop unit limits the compression stroke of the compression fixture; the physical stop unit's limitation of the compression stroke has no time delay, ensuring the accuracy of compression testing for batteries of different sizes.

[0007] In one embodiment, the stop unit includes a fixed base and a movable member; the fixed base is fixed to the upper or lower pressure plate, and the movable member is movably connected to the fixed base to adjust the extension length of the movable member relative to the fixed base in a relative direction; the movable member can be locked onto the fixed base. The length of the stop unit in the relative direction can be adjusted by the movement of the movable member relative to the fixed base.

[0008] In one embodiment, the movable member is movable on the fixed base along the relative direction to adjust the extension length of the movable member relative to the fixed base in the relative direction. The upper and lower pressure plates move closer and further apart along the relative direction, and the length of the stop unit can be adjusted more precisely by adjusting the movable member along the relative direction.

[0009] In one embodiment, the stop unit further includes a fastener; the fastener is disposed between the fixed base and the movable member to lock the movable member onto the fixed base. The fastener ensures that the movable member, after being repositioned, can be locked onto the fixed base.

[0010] In one embodiment, the fixed base has a limiting elongated hole extending along the opposite direction; the fastener is connected to the movable member and passes through the limiting elongated hole, and is slidable along the limiting elongated hole; the fastener can be locked to the outer surface of the fixed base, thereby locking the movable member onto the fixed base. Movement of the fastener in the limiting elongated hole causes the movable member to adjust its position relative to the fixed base.

[0011] In one embodiment, the fixed base has a sliding groove extending along the opposite direction; the movable member is slidably inserted into the sliding groove; the fixed base has two opposite outer surfaces respectively provided with limiting elongated holes; the fastener passes through the movable member, and both ends of the fastener pass through the limiting elongated holes respectively. The insertion of both ends of the fastener into the two limiting elongated holes on the fixed base ensures that both ends of the fastener are limited on the fixed base, thereby ensuring the stability and reliability of the fastener's fixation on the fixed base and the reliability of locking the movable member.

[0012] In one embodiment, the movable member has through holes, and multiple through holes are spaced apart along the opposite direction; the fastener can be inserted into the through holes at different positions to adjust the position of the movable member relative to the fixed seat and adjust the extension length of the movable member relative to the fixed seat.

[0013] In one embodiment, the clamping unit includes two clamping blocks; the two clamping blocks are arranged opposite each other along the opposite direction to limit the two ends of the battery; one clamping block is detachably fixed to the upper pressure plate, and the other clamping block is detachably fixed to the lower pressure plate. The two clamping blocks are detachably fixed to the upper and lower pressure plates, respectively. The two clamping blocks limit the two ends of the battery, ensuring that the battery does not move during the compression test. The detachable connection of the two clamping blocks allows for the replacement of clamping blocks of different sizes or dimensions to accommodate batteries of different sizes or dimensions.

[0014] In one embodiment, limiting grooves are respectively formed on opposite sides of the two pressure blocks to limit their position at both ends of the battery. The limiting grooves on the two pressure blocks limit the position of the battery at both ends, maintaining the battery's positional stability.

[0015] In one embodiment, the pressure block has clearance holes on the bottom wall of the limiting groove; both ends of the clearance holes penetrate the pressure block. The clearance holes provide a passage for the wires to pass through, facilitating the connection of the wires to the positive and negative terminals of the battery, while preventing the wires from being damaged by the pressure block or pressure plate during the compression process, thus ensuring the continuity of electrical signal monitoring during the test.

[0016] In one embodiment, a pressure relief hole is provided on the outer side of the pressure block, and the pressure relief hole extends to the clearance hole or the limiting groove. When the battery is placed in the limiting groove, the pressure relief hole can be used to expel air from the limiting groove, so that the limiting groove can be fitted onto the end of the battery.

[0017] In one embodiment, the upper and lower pressure plates are each provided with a through hole; the through hole communicates with the corresponding clearance hole. The through hole can be used for wiring and venting.

[0018] In one embodiment, handles are fixed on opposite sides of the lower pressure plate; the handles are positioned near the edge of the lower pressure plate. The handles facilitate the movement of the compression testing fixture.

[0019] In one embodiment, a slide rail is further included; the slide rail extends along the opposite directions; one end of the slide rail is fixed to the lower pressure plate; and the upper pressure plate is slidably fitted onto the slide rail. The slide rail design ensures that the upper and lower pressure plates can only move in opposite directions, resulting in a more balanced pressure on the battery.

[0020] In one embodiment, a compression head is further included, connected to the upper pressure plate to move the upper pressure plate in the opposite direction. The compression head moves the upper pressure plate, causing pressure blocks on the upper pressure plate to compress the battery, providing compression force for the compression test. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of an embodiment of the extrusion testing fixture of this utility model.

[0022] Figure 2 This is an exploded view of an embodiment of the extrusion testing fixture of this utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the pressure block of this utility model.

[0024] Figure 4 This is a cross-sectional view of the pressure block of this utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the lower pressure plate of this utility model.

[0026] Figure 6 This is a structural schematic diagram from one perspective of an embodiment of the stop unit of this utility model.

[0027] Figure 7 This is a structural schematic diagram from one perspective of an embodiment of the stop unit of this utility model.

[0028] Figure 8 This is a structural schematic diagram of an embodiment of the fixing base of this utility model.

[0029] Figure 9 This is a structural schematic diagram of an embodiment of the movable component of this utility model.

[0030] Figure label: 10. Battery; 100. Lower pressure plate; 110. Through hole; 120. Wiring channel; 200. Upper pressure plate; 300. Clamping unit; 310. Pressure block; 311. Limiting groove; 312. Clearance hole; 313. Pressure relief hole; 400. Extrusion head; 500. Stop unit; 510. Fixing base; 511. Limiting elongated hole; 512. Sliding groove; 520. Moving part; 521. Through hole; 530. Fastener; 600. Slide rail; 700. Handle. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0032] In related technologies, during battery compression testing, sensors and other structures provide feedback on the movement of the compression fixture, enabling testing of batteries of different sizes on the fixture. However, the cutoff condition is usually a stop in displacement or force, but there is a certain delay between the device's compression head indicating a need to stop and the device actually stopping. This delay often results in the compression stroke exceeding the set limit, leading to over-compression of the battery and affecting test accuracy.

[0033] One inventive concept of this application is to limit the extrusion stroke of the extrusion tooling by using an adjustable length stop unit. The limitation of the physical structure does not have a time delay, thereby ensuring the accuracy of extrusion testing of batteries of different sizes.

[0034] For ease of description and understanding, the test fixture is used in its current state as a reference. The movement direction of the test fixture is vertical. The direction perpendicular to vertical is the horizontal direction.

[0035] Figure 1 This is a structural schematic diagram of an embodiment of the extrusion testing fixture of this utility model. Figure 2 This is an exploded view of an embodiment of the extrusion testing fixture of this utility model.

[0036] See Figure 1 and Figure 2This application provides a compression testing fixture for a battery 10, used to perform compression tests on the battery 10. The compression testing fixture includes a lower pressure plate 100, an upper pressure plate 200, and a clamping unit 300. The clamping unit 300 is used to clamp both ends of the battery 10 to limit the battery 10. It can also compress the battery 10 during the compression test. The clamping unit 300 is disposed on the upper pressure plate 200 and the lower pressure plate 100, so that it can move with the upper pressure plate 200 or the lower pressure plate 100. The upper pressure plate 200 is disposed opposite to the lower pressure plate 100, and can move closer to and further away from the lower pressure plate 100 in a relative direction. When the upper pressure plate 200 and the lower pressure plate 100 are close together, they can drive the clamping unit 300 to move, thereby compressing the battery 10 and testing the battery 10.

[0037] It should be noted that the relative direction of the upper pressure plate 200 and the lower pressure plate 100 can be vertical, horizontal, or any other direction. The following explanation uses the vertical direction as the relative direction.

[0038] See Figure 1 and Figure 2 The testing fixture also includes an extrusion head 400, which is connected to the upper pressure plate 200 to move the upper pressure plate 200 in a relative direction. The upper pressure plate 200 is fixedly connected to the extrusion head 400, which is connected to a telescopic rod (cylinder or hydraulic cylinder). The telescopic rod moves the extrusion head 400, thereby moving the upper pressure plate 200.

[0039] In one specific embodiment, the extrusion head 400 abuts against the side of the upper pressure plate 200 opposite to the lower pressure plate 100, and the extrusion head 400 can push the upper pressure plate 200 toward the lower pressure plate 100.

[0040] In some embodiments, the telescopic rod is directly connected to the upper pressure plate 200, and the telescopic rod directly drives the upper pressure plate 200 to move. In other embodiments, the upper pressure plate 200 is fixed in position, and the lower pressure plate 100 can move away from and towards the upper pressure plate 200. In yet another embodiment, both the upper pressure plate 200 and the lower pressure plate 100 are movable, and the upper pressure plate 200 and the lower pressure plate 100 can move relatively closer to and away from each other.

[0041] See again Figure 1 and Figure 2The extrusion test fixture also includes a slide rail 600; the slide rail 600 extends in opposite directions; one end of the slide rail 600 is fixed to the lower pressure plate 100; the upper pressure plate 200 is slidably fitted onto the slide rail 600 so that the upper pressure plate 200 can only move along the length direction of the slide rail 600, providing precise guidance for the movement of the upper pressure plate 200 and ensuring that the upper pressure plate 200 always remains parallel to the lower pressure plate 100, so that the extrusion force is evenly applied to the battery 10. When the upper pressure plate 200 and the lower pressure plate 100 are close to the extrusion of the battery 10, there will be no movement in other directions between the upper pressure plate 200 and the lower pressure plate 100, and there will be no problem of uneven extrusion force on the battery 10 due to skewing.

[0042] The slide rail 600 extends in a straight line, and its lower end is fixed to the lower pressure plate 100. The upper end of the guide rail passes through the upper pressure plate 200. A sleeve is fixed on the upper pressure plate 200, and the sleeve is fitted onto the slide rail 600.

[0043] In one embodiment, the upper pressure plate 200 and the lower pressure plate 100 are tested relative to each other in the vertical direction. The slide rail 600 extends in the vertical direction, and the upper pressure plate 200 is sleeved on the slide rail 600. The upper pressure plate 200 can only slide in the vertical direction, and the upper pressure plate 200 will not move horizontally relative to the lower pressure plate 100.

[0044] In another embodiment, multiple slide rails 600 are provided, spaced apart, with the spacing direction of the multiple slide rails 600 perpendicular to the opposite direction. The upper pressure plate 200 is sleeved on the multiple slide rails 600, further ensuring that the upper pressure plate 200 and the lower pressure plate 100 can always remain parallel, ensuring uniform pressure when the battery 10 is squeezed.

[0045] In some embodiments, the number of slide rails 600 is set to two, three, four, and five, etc.

[0046] Figure 3 This is a structural schematic diagram of the pressure block 310 of this utility model. Figure 4 This is a cross-sectional view of the pressure block 310 of this utility model.

[0047] See Figure 3 and Figure 4 The clamping unit 300 includes two clamping blocks 310; the two clamping blocks 310 are arranged opposite each other in opposite directions and are disposed between the upper pressure plate 200 and the lower pressure plate 100 to limit the two ends of the battery 10. The two clamping blocks 310 are detachably fixed to the upper pressure plate 200 and the lower pressure plate 100 respectively.

[0048] When the upper pressure plate 200 and the lower pressure plate 100 approach each other, they cause the two pressure blocks 310 to move closer together in opposite directions, thereby squeezing the clamped battery 10 for compression testing of the battery 10. The two pressure blocks 310 are detachably fixed to the upper pressure plate 200 and the lower pressure plate 100 respectively, so that pressure blocks 310 of different sizes can be replaced to adapt to the testing of batteries 10 of different sizes.

[0049] For example, the two pressure blocks 310 include an upper pressure block fixed to the upper pressure plate 200 and a lower pressure block fixed to the lower pressure plate 100; the upper pressure block and the lower pressure block are used to limit one end of the battery 10 respectively.

[0050] In one embodiment, the two pressure blocks 310 are detachably fixed to the corresponding upper pressure plate 200 and lower pressure plate 100 by fasteners 530 (such as bolts or screws). For example, a connecting hole is provided on the pressure block 310, the fastener 530 passes through the connecting hole and is threaded onto the corresponding upper pressure plate 200 and lower pressure plate 100.

[0051] In another embodiment, the upper pressure plate 200 and the lower pressure plate 100 are detachably fixed to the corresponding upper pressure plate 200 and lower pressure plate 100 by means of hooks or buckles.

[0052] See Figure 4 Each of the two pressure blocks 310 has a limiting groove 311 on its opposite side to limit the movement of the battery 10. The size of the limiting groove 311 is adapted to the size of the battery 10 so that the limiting groove 311 can be fitted onto the end of the battery 10 and limit the movement of the battery 10.

[0053] In one embodiment, the extrusion testing fixture is used for extrusion testing of the cylindrical battery 10. The limiting groove 311 is a circular hole structure to accommodate the outer periphery of the cylindrical battery 10, and the limiting grooves 311 of the two pressure blocks 310 limit the ends of the cylindrical battery 10. When testing batteries 10 of different sizes is required, different pressure blocks 310 are replaced. Different pressure blocks 310 have different sized limiting grooves 311 to accommodate batteries 10 of different sizes.

[0054] In another embodiment, when the extrusion test fixture is used for extrusion testing of the rectangular battery 10, the limiting groove 311 is correspondingly set as a rectangular hole.

[0055] It should be noted that the dimensions of the limiting grooves 311 on the two pressure blocks 310 can be the same or different, in order to adapt to the shape and size at both ends of the battery 10.

[0056] In one embodiment, the pressure block 310 has a clearance hole 312 on the bottom wall of the limiting groove 311; both ends of the clearance hole 312 pass through the pressure block 310. The clearance hole 312 provides a channel for the wire to pass through, which facilitates the connection of the wire to the positive and negative terminals of the battery 10, while preventing the wire from being damaged by the pressure block 310 or the pressure plate during the compression process, thus ensuring the continuity of electrical signal monitoring during the test.

[0057] The clearance holes 312 on the two pressure blocks 310 are set on the opposite sides of the two pressure blocks 310, so as to ensure that when the opposite sides of the two pressure blocks 310 are limited on the battery 10, they will not interfere with the clearance holes 312 on the opposite sides of the two pressure blocks 310, so as not to cause excessive pressure and squeezing of the wires or terminals in the two clearance holes 312.

[0058] The diameter of the clearance hole 312 is smaller than the diameter of the limiting groove 311, thereby ensuring that the pressure block 310 limits the two ends of the battery 10.

[0059] In one embodiment, a pressure relief hole 313 is provided on the outer side of the pressure block 310, and the pressure relief hole 313 extends to the clearance hole 312 or the limiting groove 311. When the battery 10 is placed in the limiting groove 311, the pressure relief hole 313 can be used to discharge the air in the limiting groove 311, so that the limiting groove 311 can be fitted onto the end of the battery 10.

[0060] The pressure relief hole 313 extends perpendicularly to the extension direction of the limiting groove 311. For example, two pressure blocks 310 are arranged opposite each other in the vertical direction. The limiting groove 311 extends vertically, and the pressure relief hole 313 extends horizontally.

[0061] In one embodiment, the pressure relief hole 313 and the clearance hole 312 are of the same structure. When the pressure relief hole 313 and the clearance hole 312 are of the same structure, they can be used for the passage of wires and for venting. In another embodiment, the pressure relief hole 313 and the clearance hole 312 are respectively formed on the pressure block 310.

[0062] In some embodiments, the pressure relief hole 313 is formed on the peripheral side of the pressure block 310 and is located at one end of the pressure block 310 that is fixed to the corresponding upper pressure plate 200 or lower pressure plate 100.

[0063] Figure 5 This is a structural schematic diagram of the lower pressure plate 100 of this utility model.

[0064] See Figure 1 , Figure 2 as well as Figure 5The upper pressure plate 200 and the lower pressure plate 100 are respectively provided with through holes 110; the through holes 110 penetrate the corresponding upper pressure plate 200 and lower pressure plate 100 in opposite directions; the through holes 110 are connected to the corresponding clearance holes 312. The through holes 110 can also be used as a structure for pressure relief and wire threading.

[0065] In one embodiment, a wiring groove 120 is formed on the side of the lower pressure plate 100 opposite to the upper pressure plate 200, extending from that side. The wiring groove 120 communicates with the through hole 110 on the lower pressure plate 100, and at least one end of the wiring groove 120 extends beyond the outer peripheral surface of the lower pressure plate 100. Test wires can pass through the wiring groove 120, the through hole 110, and the clearance hole 312 from the outer periphery of the lower pressure plate 100 to contact one end of the battery 10. The wiring groove 120 effectively prevents the wires from being squeezed.

[0066] In some embodiments, the side of the lower pressure plate 100 that is opposite to the upper pressure plate 200 is a planar structure. The side of the lower pressure plate 100 that is opposite to the upper pressure plate 200 is placed on the surface of the operating platform, and the wiring groove 120 is provided to prevent the wires from being squeezed.

[0067] In one specific embodiment, the extrusion head 400 abuts against the upper end of the upper pressure plate 200. After the extrusion head 400 moves upward to a certain height, it can separate from the upper pressure plate 200. After the extrusion head 400 separates from the upper pressure plate 200, it is convenient to move the extrusion test fixture.

[0068] When testing battery 10, the battery to be tested is placed inside the pressure block 310 on the lower pressure plate 100. Under the action of gravity, the pressure block 310 on the upper pressure plate 200 and the upper pressure plate 200 move downwards, and the pressure block 310 on the upper pressure plate 200 engages with the upper end of battery 10. When the two ends of battery 10 are respectively housed in the pressure block 310, the wires or terminals inside the pressure block 310 abut against the electrodes of battery 10. The extrusion head 400 moves downwards and abuts against the upper pressure plate 200, and drives the lower pressure plate 100 to move downwards to perform a compression test on battery 10.

[0069] In one embodiment, handles 700 are fixed on opposite sides of the lower pressure plate 100; the handles 700 are located near the edge of the lower pressure plate 100 to facilitate moving the extrusion test fixture.

[0070] In one embodiment, the extrusion head 400 and the upper pressure plate 200 are connected as one unit. After the battery 10 is placed in the pressure block 310 of the lower pressure plate 100, the extrusion head 400 drives the upper pressure plate 200 and the pressure block 310 on the upper pressure plate 200 to move downward, so that the pressure block 310 on the upper pressure plate 200 engages with the upper end of the battery 10 and extrudes the battery 10.

[0071] Figure 6 This is a structural schematic diagram from one perspective of an embodiment of the stop unit 500 of this utility model. Figure 7 This is a structural schematic diagram from one perspective of an embodiment of the stop unit 500 of this utility model. Figure 8 This is a structural schematic diagram of an embodiment of the fixing base 510 of this utility model. Figure 9 This is a structural schematic diagram of an embodiment of the movable component 520 of this utility model.

[0072] See Figures 6 to 9 The extrusion test fixture also includes a stop unit 500. The stop unit 500 is used to abut against the upper pressure plate 200 and the lower pressure plate 100 respectively when they approach each other, limiting their proximity. The stop unit 500 is a solid structure that limits the movement of the upper pressure plate 200 and the lower pressure plate 100 without delay, ensuring the safety of the extrusion test. The stop unit 500 is designed with an adjustable length in the relative direction to adjust the distance between the upper pressure plate 200 and the lower pressure plate 100, thus adjusting the extrusion stroke and adapting to extrusion tests of batteries 10 of different sizes.

[0073] The stop unit 500 has two ends that can respectively abut against the upper pressure plate 200 and the lower pressure plate 100 to limit the proximity between the upper pressure plate 200 and the lower pressure plate 100, thus limiting the extrusion stroke. The stop unit 500 directly limits the upper pressure plate 200 and the lower pressure plate 100 without delay, effectively ensuring the accuracy of the extrusion stroke. The stop unit 500 is constructed with an adjustable length in the relative direction to adjust the proximity between the upper pressure plate 200 and the lower pressure plate 100, thereby adjusting the extrusion stroke to accommodate extrusion tests of batteries 10 of different sizes. By limiting the extrusion stroke of the extrusion fixture through the adjustable-length stop unit 500, the physical stop unit 500's limitation of the extrusion stroke has no time delay, thus ensuring the accuracy of extrusion tests on batteries 10 of different sizes.

[0074] The stop unit 500 includes a fixed base 510 and a movable member 520. The fixed base 510 is fixed to the upper pressure plate 200 or the lower pressure plate 100. The movable member 520 is movably disposed on the fixed base 510 and can be locked onto the fixed base 510. The movable member 520 moves on the fixed base 510, and by adjusting the length of the movable member 520 relative to the fixed base 510 in the opposite direction, the length between the movable member 520 and the fixed base 510 in the relative direction can be adjusted. The movable member 520 is adjusted to different lengths on the fixed base 510 and locked onto the fixed base 510, thereby allowing the movable member 520 to be fixed on the fixed base 510 at different lengths to accommodate testing of batteries 10 of different lengths.

[0075] In one embodiment, the fixed base 510 is fixed to the side of the lower pressure plate 100 facing the upper pressure plate 200, and the movable member 520 is movable relative to the fixed base 510 in a direction away from the lower pressure plate 100. In another embodiment, the fixed base 510 is fixed to the side of the upper pressure plate 200 facing the lower pressure plate 100, and the movable member 520 is movable relative to the fixed base 510 in a direction away from the upper pressure plate 200.

[0076] In one embodiment, the movable member 520 is movable on the fixed base 510 in a relative direction to adjust the extension length of the movable member 520 relative to the fixed base 510 in that direction. After the movable member 520 moves on the fixed base 510 in the relative direction, the movable member 520 is locked on the fixed base 510, locking the movement of the movable member 520. Different extension lengths of the movable member 520 relative to the fixed base 510 allow adjustment of the length of the stop unit 500 in the relative direction.

[0077] The upper pressure plate 200 and the lower pressure plate 100 move closer and further apart in opposite directions; the movable part 520 moves in opposite directions along the upper pressure plate 200 and the lower pressure plate 100, ensuring that the adjustment direction of the movable part 520 is consistent with the extrusion direction, making the adjustment of the extrusion stroke of the upper pressure plate 200 and the lower pressure plate 100 more precise, and further ensuring the accuracy of extrusion distance control.

[0078] In some embodiments, the movable member 520 is rotatable relative to the fixed base 510, and one end of the movable member 520 is rotatably disposed on the fixed base 510 so that the movable member 520 is extended to different angles relative to the fixed base 510, thereby adjusting the length of the movable member 520 relative to the fixed base 510 in the relative direction.

[0079] In other embodiments, the movable member 520 is threaded onto the fixed base 510 so that the movable member 520 can rotate relative to the fixed base 510. By rotating the movable member 520, the extension length of the movable member 520 relative to the fixed base 510 in the opposite direction can be adjusted.

[0080] See Figures 6 to 9 The stop unit 500 also includes a fastener 530; the fastener 530 is disposed between the fixed base 510 and the movable member 520 for locking the movable member 520 onto the fixed base 510. After the movable member 520 moves relative to the fixed base 510 to a preset position, the movable member 520 is locked by the fastener 530 to maintain the length of the stop unit 500 in the relative direction.

[0081] In other embodiments, the fixing base 510 has a limiting elongated hole 511 extending in opposite directions; the fastener 530 passes through the limiting elongated hole 511 and can slide along the limiting elongated hole 511, and the fastener 530 can be locked on the outer surface of the fixing base 510. By moving the fastener 530 along the extending direction of the limiting elongated hole 511 and locking the fastener 530 on the fixing base 510, the fastener 530 can be positioned at different positions on the limiting elongated hole 511 in opposite directions.

[0082] Fastener 530 is connected to movable member 520 to lock movable member 520 onto fixed base 510. Fastener 530 can be locked at different positions on fixed base 510 along the extension direction of limiting elongated hole 511, thereby locking movable member 520 at different positions on fixed base 510 to adjust the extension length of movable member 520 relative to fixed base 510.

[0083] For example, fastener 530 is a bolt and a nut, which pass through the movable part 520, with its two ends passing through the limiting elongated holes 511 on both sides of the fixed base 510. The engagement of the bolt and nut fixes the bolt and nut to the fixed base 510 and the movable part 520 respectively, thereby locking the movable part 520 to the fixed base 510.

[0084] In one embodiment, the fixed base 510 has a sliding groove 512 extending in opposite directions; the movable member 520 is slidably inserted into the sliding groove 512; limiting elongated holes 511 are respectively formed on two opposite outer surfaces of the fixed base 510; a fastener 530 passes through the movable member 520, and both ends of the fastener 530 pass through the limiting elongated holes 511. The limiting elongated holes 511 extend in opposite directions, and the fastener 530 passes through the movable member 520 and the limiting elongated holes 511, and is locked onto the fixed base 510 to lock the movable member 520 onto the fixed base 510.

[0085] In one embodiment, one peripheral sidewall of the sliding groove 512 is open, and the open side of the sliding groove 512 is perpendicular to the opposite direction. If the sliding groove 512 extends vertically, one horizontal sidewall of the sliding groove 512 is open. The open side of the sliding groove 512 facilitates the placement of the movable member 520 within the sliding groove 512 and allows observation of the movable member 520 within the sliding groove 512.

[0086] In some implementations, the fastener 530 is a bolt and a nut, with the bolt passing through the movable part 520 and the limiting elongated hole 511. The engagement of the bolt and nut secures them to the fixed seat 510. Both ends of the bolt pass through the limiting elongated hole 511, and the bolt also passes through the movable part 520, thereby locking the movable part 520 to the fixed seat 510.

[0087] In some embodiments, the movable member 520 passes through the sliding groove 512 in opposite directions, and the fastener 530 is a knob. One end of the knob is located outside the fixed base 510; the other end of the knob is threaded to the fixed base 510 and can abut against the movable member 520, pressing the movable member 520 against the side wall of the sliding groove 512 and locking the movement of the movable member 520.

[0088] In some other embodiments, the movable member 520 has a through hole 521, and the fastener 530 passes through the through hole 521 so that the fastener 530 and the movable member 520 are connected.

[0089] In one embodiment, the movable member 520 has through holes 521, and multiple through holes 521 are spaced apart along opposite directions; the fastener 530 can pass through the through holes 521 at different positions. By passing the fastener 530 through the through holes 521 at different positions, the position of the movable member 520 relative to the fixed base 510 can be adjusted.

[0090] In some embodiments, the movable member 520 is adjustable in length relative to the fixed base 510 in opposite directions. Both the movable member 520 and the fixed base 510 are provided with scales corresponding to the length of the battery 10. The starting position of the scale corresponds to the bottom wall position of the limiting groove 311 on the two pressure blocks 310, thus directly corresponding to the length of the battery 10.

[0091] In one embodiment, when the battery 10 needs to be tested, the corresponding pressure block 310 is replaced to ensure that the limiting groove 311 on the pressure block 310 is compatible with the size of the battery 10 to be tested.

[0092] Then adjust the length of the stop unit 500 and loosen the fastener 530 from locking the movable part 520. After adjusting the movable part 520 to the corresponding position, tighten the fastener 530 to lock the movable part 520 onto the fixed base 510.

[0093] The battery 10 to be tested is placed in the limiting groove 311 of the pressure block 310 on the lower pressure plate 100. The upper pressure plate 200 moves downward so that the pressure block 310 on the upper pressure plate 200 is fitted downward onto the upper end of the battery 10 to be tested. The upper and lower ends of the battery 10 are limited by the pressure block 310. The wires or terminals provided in the pressure block 310 respectively abut against the electrodes of the battery 10. The extrusion head 400 moves downward, and the two terminals extrude pressure on the battery 10, thereby performing an extrusion test on the battery 10.

[0094] In this invention, the extrusion stroke of the extrusion tool is limited by an adjustable length stop unit 500. The physical stop unit 500 limits the extrusion stroke without any time delay, thereby ensuring the accuracy of extrusion testing of batteries 10 of different sizes.

[0095] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery compression testing fixture, characterized in that, include: Lower pressure plate (100); An upper pressure plate (200) is disposed opposite to the lower pressure plate (100) and is capable of moving closer to and further away from the lower pressure plate (100) in opposite directions; A clamping unit (300) is disposed on the upper pressure plate (200) and the lower pressure plate (100); the clamping unit (300) is used to clamp the two ends of the battery (10) so as to squeeze the battery (10) when the upper pressure plate (200) and the lower pressure plate (100) are close together; A stop unit (500) is disposed between the upper pressure plate (200) and the lower pressure plate (100) so that when the upper pressure plate (200) and the lower pressure plate (100) approach each other, the two ends of the stop unit (500) can respectively abut against the upper pressure plate (200) and the lower pressure plate (100); the stop unit (500) is configured to have an adjustable length in the opposite direction so as to adjust the distance between the upper pressure plate (200) and the lower pressure plate (100) when they approach each other.

2. The extrusion testing fixture according to claim 1, characterized in that, The stop unit (500) includes a fixed base (510) and a movable member (520); the fixed base (510) is fixed on the upper pressure plate (200) or the lower pressure plate (100), and the movable member (520) is movably connected to the fixed base (510) so as to adjust the extension length of the movable member (520) relative to the fixed base (510) in a relative direction; the movable member (520) can be locked on the fixed base (510).

3. The extrusion testing fixture according to claim 2, characterized in that, The movable member (520) is movable on the fixed base (510) in the opposite direction to adjust the extension length of the movable member (520) relative to the fixed base (510) in the opposite direction.

4. The extrusion testing fixture according to claim 3, characterized in that, The stop unit (500) further includes a fastener (530); the fastener (530) is disposed between the fixed base (510) and the movable member (520) for locking the movable member (520) onto the fixed base (510).

5. The extrusion testing fixture according to claim 4, characterized in that, The fixed base (510) has a limiting elongated hole (511) that extends along the opposite direction; the fastener (530) is connected to the movable part (520) and passes through the limiting elongated hole (511) and can slide along the limiting elongated hole (511). The fastener (530) can be locked to the outer side of the fixed base (510) so as to drive the movable part (520) to be locked on the fixed base (510).

6. The extrusion testing fixture according to claim 5, characterized in that, The fixed base (510) is provided with a sliding groove (512) extending along the opposite direction; the movable part (520) is slidably inserted into the sliding groove (512); the fixed base (510) is provided with the limiting elongated hole (511) on two opposite outer surfaces; the fastener (530) is inserted into the movable part (520), and both ends of the fastener (530) are inserted into the limiting elongated hole (511).

7. The extrusion test fixture according to any one of claims 4 to 6, characterized in that, The movable part (520) has through holes (521), and multiple through holes (521) are spaced apart along the opposite direction; the fastener (530) can be inserted into the through holes (521) at different positions.

8. The extrusion testing fixture according to claim 1, characterized in that, The clamping unit (300) includes two clamping blocks (310); the two clamping blocks (310) are arranged opposite to each other along the opposite direction to limit the two ends of the battery (10); one clamping block (310) is detachably fixed to the upper pressure plate (200), and the other clamping block (310) is detachably fixed to the lower pressure plate (100).

9. The extrusion testing fixture according to claim 8, characterized in that, Limiting grooves (311) are respectively provided on the opposite sides of the two pressure blocks (310) to limit them at both ends of the battery (10).

10. The extrusion testing fixture according to claim 9, characterized in that, The pressure block (310) has a clearance hole (312) on the bottom wall of the limiting groove (311); both ends of the clearance hole (312) pass through the pressure block (310).

11. The extrusion testing fixture according to claim 10, characterized in that, The outer side of the pressure block (310) is provided with a pressure relief hole (313), which extends to the clearance hole (312) or the limiting groove (311).

12. The extrusion testing fixture according to claim 10, characterized in that, The upper pressure plate (200) and the lower pressure plate (100) are respectively provided with through holes (110); the through holes (110) are connected to the corresponding clearance holes (312).

13. The extrusion testing fixture according to claim 1, characterized in that, A handle (700) is fixed on each of the opposite sides of the lower pressure plate (100); the handle (700) is located near the edge of the lower pressure plate (100).

14. The extrusion testing fixture according to claim 1, characterized in that, It also includes a slide rail (600); the slide rail (600) extends along the opposite direction; one end of the slide rail (600) is fixed on the lower pressure plate (100); the upper pressure plate (200) is slidably sleeved on the slide rail (600).

15. The extrusion testing fixture according to claim 1, characterized in that, It also includes an extrusion head (400) connected to the upper pressure plate (200) so as to drive the upper pressure plate (200) to move in the opposite direction.

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