Power battery electrical performance test bench

Abstract

The utility model provides a power battery electrical performance test bench, which belongs to the technical field of power battery testing and comprises a base provided with a first surface. One ends of the two lifting guide rods are fixedly mounted on the first surface, and the two lifting guide rods are close to the two ends of the base; the electrode mounting bracket is mounted between the two lifting guide rods in a sliding manner; the electrode assembly is installed on the electrode installation support in a sliding mode, and the sliding direction of the electrode assembly is perpendicular to the sliding direction of the electrode installation support. The battery is mounted between the base and the electrode mounting bracket; and the test is completed by connecting the electrode assembly with the battery. The electrode mounting bracket is slidably mounted on the lifting guide rod, and the electrode assembly is slidably mounted on the electrode mounting bracket; the electrode assembly slides left and right through the electrode installation support to adjust the distance between the positive electrode and the negative electrode so as to adapt to batteries of different sizes and further be suitable for testing of batteries of different models.

Description

Technical Field

[0001] The utility model belongs to the technical field of power battery testing, and particularly relates to a power battery electrical performance test bench. Background Art

[0002] During the production and R & D process of power batteries, multiple electrical performance tests need to be carried out on battery cells. Generally, there are two methods: First, the battery is placed on a shelf and directly connected to the test line for various electrical performance tests. In this process, there will be a phenomenon that multiple wires are intertwined, and the battery is directly placed on the shelf, resulting in problems such as unstable placement and easy toppling of the battery, thus causing risks such as battery short - circuit, unavailable test data, and even smoking and fire; Second, a specific tooling fixture is used to clamp the battery, and then the test line is connected for electrical performance tests. However, such a specific tooling fixture has problems such as limited adaptability to battery types and single size. When a new type of battery cell is developed, the tooling becomes useless directly, resulting in waste of resources. How to safely, conveniently and efficiently test the electrical performance of power batteries is an urgent problem to be solved. Content of the Utility Model

[0003] In view of the above problems, the utility model provides a power battery electrical performance test bench, including:

[0004] A base, the base is provided with a first surface;

[0005] Lifting guide rods, one end of two groups of lifting guide rods is fixedly installed on the first surface, and the two ends of the two groups of lifting guide rods close to the base;

[0006] An electrode mounting bracket, the electrode mounting bracket is slidably installed between the two lifting guide rods;

[0007] An electrode assembly, the electrode assembly is slidably installed on the electrode mounting bracket, and the sliding direction of the electrode assembly is perpendicular to the sliding direction of the electrode mounting bracket;

[0008] A battery, the battery is installed between the base and the electrode mounting bracket;

[0009] The test is completed by connecting the electrode assembly to the battery.

[0010] Specifically, two groups of electrode mounting brackets are both slidably installed between the two lifting guide rods; the battery is installed between the two groups of electrode mounting brackets.

[0011] Specifically, the electrode mounting bracket includes:

[0012] A first end plate, a sliding hole is provided on the first end plate, and the two first end plates are respectively slidably installed on the two groups of lifting guide rods through the sliding holes;

[0013] The third end plates, two of the third end plates are respectively installed on one side of the two first end plates away from the lifting guide rods, and a guide rail and a limit baffle are arranged between the two third end plates. Both ends of the guide rail and both ends of the limit baffle are respectively fixedly connected to the two third end plates; the guide rail is located in the middle of the third end plate; the limit baffle is located on one side of the guide rail close to the base.

[0014] Specifically, the electrode mounting bracket further includes:

[0015] The second end plate, the second end plate is arranged between the first end plate and the third end plate, one side of the second end plate is fixedly connected to the first end plate, and a first hole is arranged on the second end plate; a cylinder is arranged at one end of the second end plate away from the first end plate.

[0016] A first counterbore is arranged on the first end plate, and the first counterbore is coaxial with the first hole.

[0017] The limit spring, one end of the limit spring is installed in the first counterbore, and a limit ball head is installed at the other end of the limit spring. The limit ball head is slidably installed in the first hole.

[0018] A second hole is arranged on the third end plate, and a second counterbore is arranged on one side of the third end plate close to the second end plate. The limit ball head is movably installed in the second counterbore; the third end plate is rotatably installed on the cylinder.

[0019] Specifically, the electrode mounting bracket further includes:

[0020] The first bearing, the inner ring of the first bearing is installed with the cylinder, and the outer ring of the first bearing is installed in the second hole.

[0021] Specifically, the electrode mounting bracket further includes:

[0022] The tray, the tray is installed between the two third end plates, both ends of the tray are respectively fixedly connected to the two third end plates, and the tray is located at one end of the guide rail away from the limit baffle.

[0023] The fixed baffle, the fixed baffle is installed between the two third end plates, the fixed baffle is located at one end of the limit baffle away from the guide rail; convex clamping plates are arranged at both ends of the fixed baffle.

[0024] An installation groove is arranged on one side away from the base, and the installation groove is used for installing the convex clamping plates.

[0025] Specifically, the bench includes:

[0026] The locking screw, the locking screw is installed on one side of the first end plate away from the third end plate.

[0027] Specifically, the electrode assembly includes:

[0028] A support block, which is slidably installed between the two guide rails;

[0029] A friction block, which is arranged on the limit baffle and is located at one end of the support block away from the terminal;

[0030] An electrode, with a terminal arranged at one end of the electrode away from the limit baffle; the electrode is installed in the hole of the support block, and the electrode is slidably installed on the friction block.

[0031] Specifically, the electrode assembly further includes:

[0032] A spring, which is sleeved on the electrode and is located between the support block and the friction block.

[0033] Specifically, the electrode assembly further includes:

[0034] A second bearing, the inner ring of which is installed on the small cylinder on the side of the support block close to the guide rail, and the outer ring of the second bearing is slidably installed on the inner surface of the guide rail.

[0035] Advantageous effects:

[0036] 1. The electrode mounting bracket of the present utility model is slidably installed on the lifting guide rod, and the electrode assembly is slidably installed on the electrode mounting bracket; the electrode assembly slides left and right through the electrode mounting bracket to adjust the distance between the positive and negative electrodes, so as to adapt to batteries of different sizes, and thus can be used for testing batteries of different models.

[0037] 2. The third end plate of the present utility model is rotatably installed on the second end plate, and the third end plate can drive the guide rail and the limit baffle to rotate 180 degrees, and further drive the electrode assembly to rotate 180 degrees, so as to realize the testing of two-stage batteries.

[0038] Other features and advantages of the present utility model will be described in the subsequent description, and, in part, will be obvious from the description or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the description, the claims, and the drawings. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 is an isometric view of the overall structure of an embodiment of the present utility model;

[0041] Figure 2 is an exploded view of the overall structure of an embodiment of the present utility model;

[0042] Figure 3 is an exploded view of the electrode mounting bracket of an embodiment of the present utility model;

[0043] Figure 4 is a sectional view of the electrode mounting bracket of an embodiment of the present utility model;

[0044] Figure 5 is Figure 4 an enlarged view of the partial structure A of;

[0045] Figure 6 is an isometric view of the electrode assembly of an embodiment of the present utility model;

[0046] Figure 7 is Figure 6 an enlarged view of the partial structure B of;

[0047] Figure 8 is an exploded view of the electrode assembly of an embodiment of the present utility model;

[0048] Figure 9 is a schematic diagram of the installation method of the fixed baffle of an embodiment of the present utility model;

[0049] Figure 10 is Figure 9 an enlarged view of the partial structure C of;

[0050] Figure 11 is an isometric view of the overall structure of another embodiment of the present utility model.

[0051] In the figure, 1, base; 2, lifting guide rod; 3, locking screw; 5, battery;

[0052] 4, electrode mounting bracket; 401, first end plate; 4011, first counterbore; 4012, sliding hole;

[0053] 402, second end plate; 4021, first hole; 4022, cylinder;

[0054] 403, limiting spring; 404, limiting ball head; 405, first bearing; 406, third end plate; 4061, second counterbore; 4062, second hole; 4063, mounting groove;

[0055] 407, Screw; 408, Countersunk Screw; 409, Tray; 410, Guide Rail; 411, Limit Baffle; 412, Fixed Baffle; 4121, Protruding Clamping Plate; 4122, Rectangular Groove.

[0056] 6, Electrode Assembly; 601, Wiring Terminal; 602, Support Block; 603, Second Bearing; 604, Spring; 605, Friction Block; 606, Electrode. Specific Embodiment

[0057] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0058] Embodiment 1

[0059] As Figure 2 shown, Figure 2 is an exploded view of the overall structure of an embodiment of the present utility model; referring to Figure 2 , a power battery electrical performance test bench includes a base 1, and the base 1 is provided with a first surface; the first surface is the upper surface of the base 1; the base 1 is the base of the entire tooling, with a rectangular shape, and threaded holes are respectively machined at the four corners of the upper surface; the lifting guide rod 2 is a smooth cylindrical rod, with threads machined on the outer side of the bottom of the lifting guide rod 2, and the four lifting guide rods 2 are respectively threadedly installed in the threaded holes at the four corners of the base 1, and rectangular grooves are machined along the axial direction of the lifting guide rod 2 on the outer side of the lifting guide rod 2; the electrode mounting bracket 4 is slidably installed between the two lifting guide rods 2; the electrode assembly 6 is slidably installed on the electrode mounting bracket 4; the sliding direction of the electrode assembly 6 is perpendicular to the sliding direction of the electrode mounting bracket 4; the battery 5 is installed between the base 1 and the electrode mounting bracket 4.

[0060] The electrode assembly 6 can slide left and right along the guide rail 410 to adjust the distance between the positive and negative electrodes, so as to adapt to batteries 5 of different sizes. The test is completed by connecting the electrode assembly 6 and the battery 5.

[0061] As Figure 3 shown, Figure 3 is an exploded view of the electrode mounting bracket 4 of an embodiment of the present utility model; referring to Figure 3, the electrode mounting bracket 4 includes: a first end plate 401, on which a sliding hole 4012 is provided. Two first end plates 401 are respectively slidably mounted on two sets of lifting guide rods 2 through the sliding holes 4012. That is, two sliding holes 4012 are vertically machined on the outer protrusion of the first end plate 401, and the first end plate 401 moves on the lifting guide rod 2 through the sliding holes 4012. Two first counterbores 4011 are symmetrically machined on the upper and lower sides of the inner side of the first end plate 401. The limiting spring 403 and the limiting ball head 404 are installed in the first counterbores 4011 and are pressed by the second end plate 402. Two third end plates 406 are respectively installed on one side of the two first end plates 401 away from the lifting guide rod 2, and a guide rail 410 and a limiting baffle 411 are arranged between the two third end plates 406. The two ends of the guide rail 410 and the two ends of the limiting baffle 411 are respectively fixedly connected to the two third end plates 406; the guide rail 410 is located in the middle of the third end plate 406; the limiting baffle 411 is located on the side of the guide rail 410 close to the base 1. Specifically, the limiting baffle 411 is rectangular and is symmetrically installed in the middle of the two end third end plates 406 by countersunk head screws 408.

[0062] In the above embodiment, optionally, another implementation manner is that second counterbores 4061 are symmetrically machined on the upper and lower sides of the outer side of the third end plate 406. The second counterbores 4061 are symmetrically distributed on both sides of the first bearing 405 and cooperate with the limiting ball head 404 to stabilize the third end plate 406. When the third end plate 406 is rotated 180 degrees to change the direction, the limiting spring 403 is first squeezed, the limiting ball head 404 retracts, the third end plate 406 rotates. After the rotation is completed, the limiting ball head 404 extends out again and snaps into the second counterbore 4061 to stabilize the third end plate 406. By rotating the third end plate 406 by 180 degrees and cooperating with another electrode mounting bracket 4, it is suitable for using batteries 5 with different characteristics. An installation groove 4063 is machined at the bottom of the third end plate 406, and an arc protrusion is arranged inside the installation groove 4063, which is convenient for installing and disassembling the fixed baffle 412. The tray 409 is installed and fixed between the two third end plates 406 by countersunk head screws 408. The guide rail 410 is in the shape of a U-shaped groove and is symmetrically installed in the middle of the two third end plates 406 by countersunk head screws 408.

[0063] As Figure 4 shown, Figure 4 is a cross-sectional schematic view of the electrode mounting bracket 4 of an embodiment of the present invention; refer to Figure 4, the electrode mounting bracket 4 further includes: a second end plate 402, the second end plate 402 is disposed between the first end plate 401 and the third end plate 406, one side of the second end plate 402 is fixedly connected to the first end plate 401. Specifically, the first end plate 401 and the second end plate 402 are connected and fastened by screws 407; the other side is rotatably connected to the third end plate 406; a first hole 4021 is provided on the second end plate 402; a cylinder 4022 is provided at one end of the second end plate 402 away from the first end plate 401; a first counterbore 4011 is provided on the first end plate 401, and the first counterbore 4011 is coaxial with the first hole 4021; one end of a limiting spring 403 is installed in the first counterbore 4011, the other end of the limiting spring 403 is installed with a limiting ball head 404, and the limiting ball head 404 is slidably installed in the first hole 4021; a second hole 4062 is provided on the third end plate 406, and a second counterbore 4061 is provided on one side of the third end plate 406 close to the second end plate 402, and the limiting ball head 404 (refer to Figure 5 ) is movably installed in the second counterbore 4061; the third end plate 406 is rotatably installed on the cylinder 4022. The limiting ball head 404 extends out of the second end plate 402 under the action of the elastic force of the limiting spring 403, and will contract inward when the limiting ball head 404 is subjected to a pressure, and will extend outward when the pressure is removed.

[0064] In the above embodiment, optionally, another implementation manner is that the electrode mounting bracket 4 further includes: a first bearing 405, the inner ring of the first bearing 405 is installed with the cylinder 4022, and the outer ring of the first bearing 405 is installed in the second hole 4062. The first bearing 405 is used to reduce the friction force, and thus facilitate the rotation of the third end plate 406 driving the electrode assembly 6. A tray 409 is installed between the two third end plates 406, both ends of the tray 409 are fixedly connected to the two third end plates 406 respectively, and the tray 409 is located at one end of the guide rail 410 away from the limit baffle 411; a fixed baffle 412, the fixed baffle 412 is installed between the two third end plates 406, and the fixed baffle 412 is located at one end of the limit baffle 411 away from the guide rail 410; a rectangular groove 4122 is provided on the fixed baffle 412, and the rectangular groove 4122 is used for the electrode 606 to pass through (see Figure 9 and Figure 10 for the partial enlarged schematic diagram); protruding clamping plates 4121 are provided at both ends of the fixed baffle 412; an installation groove 4063 is provided on one side of the third end plate 406 away from the base 1, and the installation groove 4063 is used for installing the protruding clamping plates 4121.

[0065] As Figure 1 shown, Figure 1 is the overall structural axonometric schematic diagram of an embodiment of the present invention; refer to Figure 1, the test bench includes a locking screw 3, which is installed on the side of the first end plate 401 away from the third end plate 406 and is used to tighten the lifting guide rod 2. The locking screw 3 has a self-locking function and is respectively installed in the threaded holes at the outer ends of the two electrode mounting brackets 4 and embedded in the rectangular groove of the lifting guide rod 2. By tightening the locking screw 3, the two electrode mounting brackets 4 are fixed on the lifting guide rod 2. In addition, the different positions of the multiple electrode mounting brackets 4 on the lifting guide rod 2 can be adjusted by loosening and tightening the locking screw 3 to adapt to batteries 5 with different height dimensions.

[0066] As Figure 6 shown, Figure 6 is an axonometric schematic diagram of an electrode assembly 6 according to an embodiment of the present invention; referring to Figure 6 , the electrode assembly 6 includes: a support block 602, which is slidably installed between the guide rails 410; at the same time, the support block 602 is locked and fixed on the electrode 606. The support block 602 is rectangular, and second bearings 603 are installed at the four corners of the support block 602, and the second bearings 603 are embedded in the U-shaped grooves of the guide rails 410, so that the electrode assembly 6 can slide left and right along the guide rails 410. A wiring terminal 601 is provided at one end of the electrode 606 away from the limit baffle 411. The wiring terminal 601 is mainly used for connecting the wires of the external electrical performance test cabinet, and the electrode 606 is installed in the hole of the support block 602.

[0067] In the above embodiment, an alternative embodiment is that the electrode assembly 6 further includes a friction block 605 (refer to Figure 7 ), the friction block 605 is slidably installed on the electrode 606, and the friction block 605 is located at one end of the support block 602 away from the wiring terminal 601, and the friction block 605 contacts the limit baffle 411; a spring 604 is sleeved on the electrode 606, and the spring 604 is located between the support block 602 and the friction block 605. One end of the spring 604 contacts the support block 602, and the other end contacts the friction block 605. (Refer to Figure 8 ), the friction block 605 is U-shaped. Under the extrusion of the spring 604, the friction block 605 contacts the limit baffle 411, and the electrode assembly 6 is fixed on the limit baffle 411. The contact surface between the bottom of the friction block 605 and the limit baffle 411 has a large friction force. By lifting the U-shaped friction block 605, the contact between the friction block 605 and the limit baffle 411 is separated, so that the electrode assembly 6 can move freely along the guide rail 410. The contact surface between the limit baffle 411 and the friction block 605 is roughened to increase friction and improve the contact reliability.

[0068] In this embodiment, the electrode assembly 6 further includes a second bearing 603. The inner ring of the second bearing 603 is mounted on the small cylinder of the support block 602 close to the guide rail 410 side, and the outer ring of the second bearing 603 is slidably mounted on the inner surface of the guide rail 410, that is, the inner part of the guide rail. The second bearing 603 functions as a wheel to reduce the frictional force. The tray 409, the guide rail 410, the limit baffle 411, the fixed baffle 412, and the friction block 605 are all insulated to improve the safety during the test of the battery 5.

[0069] Principle of operation,

[0070] When manually adjusting the position of the electrode assembly 6, first manually move the friction block 605 towards the support block 602 to separate the friction block 605 from the limit baffle 411, then move the electrode assembly 6 to the specified position, and release the friction block 605. Under the action of the spring 604, the friction block 605 comes into contact with and is fixed to the limit baffle 411 again. The electrodes 606 can be divided into positive and negative electrodes according to the polarity. One positive and one negative electrode are used in combination to test a battery 5. When the positive and negative electrode posts of the battery 5 are on the same side, rotate the first electrode mounting bracket 4 by 180 degrees, and test multiple batteries 5 on the upper and lower layers respectively (as Figure 11 shown).

[0071] Embodiment 2,

[0072] Both groups of electrode mounting brackets 4 are slidably mounted between the two lifting guide rods 2; the battery 5 is mounted between the two groups of electrode mounting brackets 4. The installation order of the electrode assembly 6 on the lower first electrode mounting bracket 4 is positive-negative, positive-negative, and the installation order on the upper first electrode mounting bracket 4 is negative-positive, negative-positive. By rotating the first electrode mounting bracket 4, it is suitable for the battery 5 with an electrode post at one end and the battery 5 with electrode posts at both ends; the battery 5 is the power battery used in electric vehicles;

[0073] When the positive and negative electrode posts of the battery 5 are at both ends, manually rotate the third end plate 406 by 180 degrees for commutation. The limit spring 403 is first compressed, the limit ball head 404 retracts, and the third end plate 406 rotates. After the commutation is completed, the limit ball head 404 extends out again and snaps into the second counterbore 4061 to stabilize the third end plate 406. By rotating the third end plate 406 by 180 degrees and cooperating with another electrode mounting bracket 4, when the positive and negative electrode posts of the battery 5 are at both ends, the electrodes 606 of the two first electrode mounting brackets 4 face each other, and the battery 5 is placed between the upper and lower layers of electrodes 606 for testing (as Figure 1 shown).

[0074] It can be seen that the present utility model can adjust the spacing and height of the electrode assembly 6 according to factors such as the spacing of the battery 5 pole columns and the height dimension of the battery 5 to adapt to batteries 5 of different sizes. In addition, the entire electrode assembly 6 can rotate 360 degrees, which is applicable not only to batteries 5 with pole columns on one side but also to batteries 5 with pole columns at both ends, increasing the versatility of the test bench. The present utility model adopts an independent electrode assembly 6, and the external connecting wires of the test cabinet can be directly connected to the electrode connection terminals 601, avoiding the short-circuit risk caused by multiple wires being intertwined and improving the safety during the test process.

[0075] Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A power battery electrical performance test bench, characterized in that Comprising: A base (1), the base (1) being provided with a first surface; Lifting guide rods (2), one end of each of the two groups of lifting guide rods (2) being fixedly installed on the first surface, and the two ends of the two groups of lifting guide rods (2) being close to the base (1); An electrode mounting bracket (4), the electrode mounting bracket (4) being slidably installed between the two lifting guide rods (2); An electrode assembly (6), the electrode assembly (6) being slidably installed on the electrode mounting bracket (4), the sliding direction of the electrode assembly (6) being perpendicular to the sliding direction of the electrode mounting bracket (4); A battery (5), the battery (5) being installed between the base (1) and the electrode mounting bracket (4); The test is completed by connecting the electrode assembly (6) to the battery (5).

2. The power battery electrical performance test bench according to claim 1, characterized in that, Both of the two groups of electrode mounting brackets (4) are slidably installed between the two lifting guide rods (2); the battery (5) is installed between the two groups of electrode mounting brackets (4).

3. The power battery electrical performance test bench according to claim 1 or 2, characterized in that The electrode mounting bracket (4) includes: A first end plate (401), a sliding hole (4012) being provided on the first end plate (401), and the two first end plates (401) being respectively slidably installed on the two groups of lifting guide rods (2) through the sliding holes (4012); A third end plate (406), the two third end plates (406) being respectively installed on one side of the two first end plates (401) away from the lifting guide rods (2), and a guide rail (410) and a limit baffle (411) being provided between the two third end plates (406), the two ends of the guide rail (410) and the two ends of the limit baffle (411) being respectively fixedly connected to the two third end plates (406); the guide rail (410) is located in the middle of the third end plate (406); the limit baffle (411) is located on one side of the guide rail (410) close to the base (1).

4. A power battery electrical performance test bench according to claim 3, characterized in that, The electrode mounting bracket (4) further includes: A second end plate (402), the second end plate (402) being arranged between the first end plate (401) and the third end plate (406), one side of the second end plate (402) being fixedly connected to the first end plate (401), and a first hole (4021) being provided on the second end plate (402); a cylinder (4022) is provided at one end of the second end plate (402) away from the first end plate (401); A first counterbore (4011) is provided on the first end plate (401), and the first counterbore (4011) is coaxial with the first hole (4021); A limit spring (403), one end of the limit spring (403) being installed in the first counterbore (4011), the other end of the limit spring (403) being installed with a limit ball head (404), and the limit ball head (404) being slidably installed in the first hole (4021); A second hole (4062) is provided on the third end plate (406). A second counterbore (4061) is provided on one side of the third end plate (406) close to the second end plate (402). The limit ball head (404) is movably installed in the second counterbore (4061); the third end plate (406) is rotatably installed on the cylinder (4022).

5. The power battery electrical performance test bench according to claim 4, characterized in that, The electrode mounting bracket (4) further includes: A first bearing (405), the inner ring of the first bearing (405) is installed on the cylinder (4022), and the outer ring of the first bearing (405) is installed in the second hole (4062).

6. A power battery electrical performance test bench according to any one of claims 4-5, characterized in that, The electrode mounting bracket (4) further includes: A tray (409), the tray (409) is installed between the two third end plates (406). The two ends of the tray (409) are respectively fixedly connected to the two third end plates (406), and the tray (409) is located at one end of the guide rail (410) away from the limit baffle (411); A fixed baffle (412), the fixed baffle (412) is installed between the two third end plates (406). The fixed baffle (412) is located at one end of the limit baffle (411) away from the guide rail (410); Protruding clamping plates (4121) are provided at both ends of the fixed baffle (412); An installation groove (4063) is provided on one side of the third end plate (406) away from the base (1). The installation groove (4063) is used for installing the protruding clamping plate (4121).

7. The power battery electrical performance test bench according to claim 6, characterized in that, The bench includes: A locking screw (3), the locking screw (3) is installed on one side of the first end plate (401) away from the third end plate (406).

8. The power battery electrical performance test bench according to claim 3, characterized in that The electrode assembly (6) includes: A support block (602), the support block (602) is slidably installed between the two guide rails (410); A friction block (605), the friction block (605) is arranged on the limit baffle (411) and is located at one end of the support block (602) away from the terminal (601); An electrode (606), a terminal (601) is provided at one end of the electrode (606) away from the limit baffle (411); The electrode (606) is installed in the hole of the support block (602), and the electrode (606) is slidably installed on the friction block (605).

9. A power battery electrical performance test bench according to claim 8, characterized in that, The electrode assembly (6) further includes: A spring (604), the spring (604) is sleeved on the electrode (606), and the spring (604) is located between the support block (602) and the friction block (605).

10. A power battery electrical performance test bench according to claim 8 or 9, characterized in that, The electrode assembly (6) further includes: A second bearing (603), the inner ring of the second bearing (603) is installed on the small cylinder on the side of the support block (602) close to the guide rail (410), and the outer ring of the second bearing (603) is slidably installed on the inner surface of the guide rail (410).

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