Battery cell test fixture

Abstract

The embodiment of the application provides a kind of electric core test tool, including: base, bracket and turntable;Bracket includes bottom and side wall;First clamping assembly is provided in bracket, first clamping assembly includes sequentially connected first hand wheel, first transmission mechanism and several clamping blocks;Second clamping assembly is provided below turntable, second clamping assembly includes sequentially connected second hand wheel, second transmission mechanism and several clamping plates;A group of straight grooves are opened in the bottom of bracket, first group of arc grooves are opened in the radial direction on the turntable, clamping plate is connected with first group of arc grooves by connecting piece, connecting piece passes through straight groove and first group of arc grooves simultaneously;Second group of arc grooves are circumferentially provided on the turntable;Mounting hole is provided in bracket and base, bracket, turntable and base are connected by bolt, bolt passes through the mounting hole of bracket, second group of arc grooves of turntable and the mounting hole of base simultaneously, turntable is rotatably arranged between base and bracket. Improve the heat dissipation effect, convenient operation.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a battery cell testing fixture. Background Technology

[0002] During battery cell testing, the generation and rapid accumulation of heat inevitably leads to an increase in the internal temperature of the battery, especially under high-temperature environments or during high-rate charging and discharging. Slow heat dissipation and heat accumulation within the battery cell can cause side reactions, resulting in severe and irreversible damage.

[0003] In existing technologies, such as the heat dissipation device for battery cell testing described in Chinese patent CN 222365621 U, there is a base and a battery cell body. Limiting frames are installed on the inner wall of the base, and limiting blocks are installed within the limiting frames via support springs. The battery cell body is fixed to the base by the limiting blocks. A water storage tank is provided inside the base, and the battery cell body is at least partially embedded in the water storage tank. When placing the battery cell in the above patent, the operator needs to pull four limiting blocks simultaneously, which is inconvenient and results in low testing efficiency. Summary of the Invention

[0004] In view of this, the present application provides a battery cell testing fixture to solve at least one problem existing in the background art.

[0005] In a first aspect, one embodiment of this application provides a battery cell testing fixture, including: a base, a bracket, and a turntable; the bracket includes a bottom and a side wall; a first clamping assembly is provided in the bracket, the first clamping assembly including a first handwheel, a first transmission mechanism, and a plurality of clamping blocks connected in sequence; the first handwheel, under the action of driving force, controls the plurality of clamping blocks to clamp or release the battery cell through the first transmission mechanism; A second clamping assembly is provided below the turntable. The second clamping assembly includes a second handwheel, a second transmission mechanism, and several clamping plates connected in sequence. A set of straight grooves is opened at the bottom of the bracket, and a first set of arc-shaped grooves is radially opened on the turntable. The clamping plates are connected to the first set of arc-shaped grooves through connectors. The connectors pass through both the straight grooves and the first set of arc-shaped grooves. Under the action of driving force, the second handwheel controls the several clamping plates to clamp or release the battery cell through the second transmission mechanism. The turntable is provided with a second set of arc-shaped grooves in its circumference; the bracket and the base are provided with mounting holes, and the bracket, the turntable and the base are connected by bolts. The bolts pass through the mounting holes of the bracket, the second set of arc-shaped grooves of the turntable and the mounting holes of the base. The turntable is rotatably disposed between the base and the bracket.

[0006] In conjunction with the first aspect of this application, in an optional embodiment, the first transmission mechanism includes a first gear, a second gear, a gear ring, a plurality of third gears and a plurality of racks meshing with each other, the first gear being fixedly connected to the first handwheel, the racks being fixedly connected to the clamping block, the clamping block standing at the bottom of the bracket, and the end of the clamping block adjacent to the base being located inside the gear ring.

[0007] In conjunction with the first aspect of this application, in an optional embodiment, the second transmission mechanism includes a fourth gear and a fifth gear that mesh with each other, the fourth gear being coaxially and fixedly connected to the center of the turntable, and the fifth gear being fixedly connected to the second handwheel.

[0008] In conjunction with the first aspect of this application, in an alternative embodiment, the clamping plate stands on the bottom of the bracket via the connector, and the end of the clamping block adjacent to the base is located within the gear ring.

[0009] In conjunction with the first aspect of this application, in an optional embodiment, the sidewall of the bracket has a plurality of guide holes, and the connector includes a second end, the second end being placed in the guide holes.

[0010] In conjunction with a first aspect of this application, in an alternative embodiment, the straight groove and the rack are located within the gear ring.

[0011] In conjunction with the first aspect of this application, in an alternative embodiment, the clamp is hollow and used to hold coolant.

[0012] In conjunction with the first aspect of this application, in an alternative embodiment, the back plate of the clamp is provided with fins.

[0013] In conjunction with the first aspect of this application, in an optional embodiment, a cooling fan is provided in the base, and multiple ventilation holes are provided in the bottom of the bracket and the turntable.

[0014] The battery cell testing fixture provided in this application embodiment uses a first transmission mechanism to control several clamping blocks to simultaneously clamp and release the battery cell, improving operational convenience. A second clamping assembly is used to simultaneously clamp and release the battery cell; the back plate of the clamping plate in the second clamping assembly is equipped with heat dissipation fins, further improving heat dissipation. The second transmission mechanism controls several clamping plates to simultaneously clamp and release the battery cell, improving both heat dissipation and operational convenience.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A schematic diagram of the structure of a cell testing fixture provided in an embodiment of this application. Figure 1 ; Figure 2 A schematic diagram of the structure of a cell testing fixture provided in an embodiment of this application. Figure 2 ; Figure 3 This is a schematic diagram of a bracket structure provided in one embodiment of this application; Figure 4 This is a schematic diagram of a turntable structure provided in one embodiment of this application; Figure 5 for Figure 4 Schematic diagram of section AA; Figure 6 This is a schematic diagram of the base structure of a battery cell testing fixture provided in one embodiment of this application. Detailed Implementation

[0017] To make the technical solutions and beneficial effects of this application more apparent and understandable, the technical solutions in the embodiments of this application are clearly and completely described below by listing specific examples. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0019] It should be noted that the terms "first," "second," etc., used in this application may be used to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another, and not to describe a specific order or sequence. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, not excluding the presence or addition of one or more other features.

[0020] This application provides a battery cell testing fixture for clamping the battery cell during testing and for dissipating heat from the battery cell. (Reference) Figure 1-2From bottom to top, it includes: a base 10, a bracket 30, and a cover 40. A cooling fan 11 is installed in the base 10. The bracket 30 includes a bottom 31 and side walls 36, such as... Figure 3 As shown. Multiple vents 34 are provided at the bottom 31. The cell testing fixture includes a first clamping assembly.

[0021] The first clamping assembly is disposed in the bracket 30 and includes a first handwheel 33, a first transmission mechanism, and several clamping blocks 56 connected in sequence. Under the action of driving force, the first handwheel controls the clamping blocks to clamp or release the battery cell through the first transmission mechanism. The first transmission mechanism includes a first gear 51, a second gear 52, a gear ring 53, several third gears 54, and several racks 55 that mesh with each other. The clamping blocks 56 are fixedly connected to the racks and are used to clamp the battery cell. The clamping blocks 56 are hollow cylinders with a certain height. There are an even number of clamping blocks 56, which are symmetrically arranged with respect to the center of the bottom of the bracket 30. The clamping blocks 56 stand on the bottom 31, and one end of them near the bottom 31 is disposed inside the gear ring 53. The first handwheel 33 passes through the side wall 36 and is fixedly connected to the first gear 51. The second gear 52 meshes with the outer teeth of both the first gear 51 and the gear ring 53. The third gear 54 meshes with the inner teeth of both the racks 55 and the gear ring 53. By rotating the first handwheel 33, the first gear 51 rotates accordingly, which in turn drives the second gear 52, the gear ring 53, the third gear 54 and the rack 55 to rotate in sequence, thereby simultaneously controlling several clamping blocks 56 to move towards and away from the center of the bottom 41, realizing the clamping and release of the battery cell.

[0022] The number of third gears 54 and racks 55 corresponds to the number of clamps 56. Each clamp 56 is hollow and used to hold coolant; a plug 561 is provided on the top of each clamp 56. Opening the plug 561 exposes the inlet, through which coolant can be added. The rotation axes of the first gear 51 and the second gear 52 are perpendicular to each other.

[0023] In a possible implementation, the cell testing fixture further includes a turntable 20, which is rotatably disposed between the base 10 and the bracket 30. A second clamping assembly is disposed below the turntable. The second clamping assembly includes a second handwheel, a second transmission mechanism, and several clamping plates connected in sequence. A set of straight grooves 32 is formed at the bottom of the bracket, and a first set of arc-shaped grooves 22 are formed radially on the turntable. The clamping plates are connected to the first set of arc-shaped grooves 22 through connectors, which pass through both the straight grooves 32 and the first set of arc-shaped grooves 22. Under the action of driving force, the second handwheel controls the several clamping plates to clamp or release the cell through the second transmission mechanism.

[0024] Mounting holes are provided in the bracket 30 and the base 10. The bracket, turntable and base 10 are connected by bolts 70. The bolts 70 pass through the mounting holes 35 of the bracket 30, the second set of arc grooves 21 of the turntable 20 and the mounting holes 13 of the base 10. The turntable 20 is rotatably disposed between the base 10 and the bracket 30.

[0025] The second transmission mechanism includes a fourth gear 62 and a fifth gear 63 that mesh with each other. The fourth gear 62 is fixedly connected to the second handwheel 61. The fifth gear 63 is fixedly connected coaxially to the center of the turntable. Figure 4 As shown, the turntable 20 has a second set of arc-shaped grooves 21 circumferentially. Under the action of driving force, the second handwheel 61 controls several clamping plates 65 to clamp or release the battery cells through the second transmission mechanism. The bracket and the base are provided with mounting holes. The bracket, turntable and base are connected by bolts 70. The bolts pass through the mounting holes 35 of the bracket, the second set of arc-shaped grooves 21 of the turntable and the mounting holes 13 of the base. The turntable 20 is rotatably mounted between the base 10 and the bracket 30.

[0026] like Figure 3 As shown, a set of straight grooves 32 are radially provided on the bottom 31 of the bracket 30. Several guide holes 37 are provided on the sidewalls of the bracket 30. Several clamping plates 65 and connecting members 64 fixed to the clamping plates 65 are included. The clamping plates 65 stand on the bottom 31 via the connecting members 64, with one end near the bottom 31 positioned within the gear ring 53. The connecting member 64 is T-shaped, with its first end 641 passing through both the straight groove 32 and the first set of arc-shaped grooves 22. Its second end 642 is placed in the guide hole 37. The guide hole 37 is used to limit the radial movement of the connecting member 64. The rotation axes of the fourth gear 62 and the fifth gear 63 are perpendicular to each other. The number of clamping plates 65 is even, symmetrically arranged with respect to the center of the bottom of the bracket 30. Fins are provided on the back plate of the clamping plates 65. By rotating the second handwheel 61, the fifth gear 62 rotates accordingly, driving the fourth gear 63 and the turntable 20 to rotate. This, in turn, causes the first end 641 of the connector 64 to move simultaneously in the first set of arc-shaped grooves 22 and straight grooves 32. At the same time, the second end 642 of the connector 64 moves in the guide hole 37, thereby controlling the movement of several clamping plates 65 fixedly connected to the connector 64 towards and away from the center of the bottom 41, realizing the clamping and release of the battery cell. Optionally, the first gear 51, the second gear 52, the fourth gear 63, and the fifth gear 62 are bevel gears.

[0027] like Figure 6As shown, the base 10 includes a top surface 12 and a bottom surface 14. The second handwheel 61 is located outside the side wall of the base and passes through the side wall of the base 10, being fixedly connected to the fifth gear 62. The bottom 31 of the bracket 30 is provided with a first fixing hole 35. The top surface 12 of the base 10 is provided with a second fixing hole 13. The bolt 70 passes through the first fixing hole 35, the second set of arc-shaped grooves 21, and the second fixing hole 13 simultaneously. The bracket 30 and the base 10 are connected by the bolt 70. The bolt 70 is a shoulder bolt. A certain gap is left between the bracket 30 and the base 10 to allow the turntable 20 to rotate. During the rotation of the turntable 20, the bolt 70 rotates along the second set of arc-shaped grooves 21.

[0028] The number of clamping plates 65 and clamping blocks 56 can be adjusted as needed. Correspondingly, the number of racks 55, third gears 54, and connecting blocks 64 connected to the clamping plates 65 and clamping blocks 56 can be adjusted accordingly. The figure shows a case where there are four clamping plates 65 and four clamping blocks 56. It is understood that the number of clamping plates 65 and two clamping blocks 56 can also be two each. Ventilation holes 23 are also provided in the turntable 20.

[0029] The working process of the cell testing fixture in this embodiment is as follows: Rotating the first handwheel 33 in the first direction causes the first gear 51 to rotate, which in turn drives the second gear 52, the gear ring 53, and the third gear 54 to rotate, thereby causing the rack 55 and the clamping block 56 fixedly connected to the rack 55 to open. Next, rotating the second handwheel 61 in the first direction causes the fifth gear 62 to rotate, which in turn drives the fourth gear 63 and the turntable 20 fixedly connected to the fourth gear 63 to rotate, thereby causing the first end 641 of the connector 64 to move simultaneously in the straight groove 35 and the second set of arc-shaped grooves 22. At the same time, the second end 642 of the connector 64 moves along the guide hole 37, so that the connector 64 moves radially away from the center of the bottom 31 of the bracket 30, thereby controlling the opening of the clamping plate 65 fixedly connected to the connector 64.

[0030] After the clamping plates 65 and clamping blocks 56 are fully open, the battery cell to be tested is placed among the clamping plates 65 and clamping blocks 56. Then, the first handwheel 33 is rotated in a second direction opposite to the first direction, sequentially driving the first gear 51, second gear 52, gear ring 53, and third gear 54 to rotate, thereby causing the rack 55 and the clamping blocks 56 fixedly connected to the rack 55 to clamp towards the center. Next, the second handwheel 61 is rotated in a second direction opposite to the first direction, sequentially driving the fifth gear 62, fourth gear 63, and turntable 20 to rotate in the opposite direction, thereby causing the connector 64 and the clamping plates 65 fixedly connected to the connector 64 to clamp towards the center. In this way, the battery cell is clamped and tested. During the test, the cooling fan 11 in the base is turned on, and air is blown to the battery cell to be tested through the vents in the turntable 20 and the bracket 30 to remove the heat generated during the test, achieving heat dissipation and cooling.

[0031] After the test, operate the first handwheel 33 and the second handwheel 61 respectively to control the multiple clamps 65 and clamps 56 to open and remove the battery cell.

[0032] During the process of opening the clamping plate 65 and clamping block 56, the operating sequence of the first handwheel 33 and the second handwheel 61 is unrestricted. Similarly, during the process of tightening the clamping plate 65 and clamping block 56, the operating sequence of the first handwheel 33 and the second handwheel 61 is also unrestricted.

[0033] The battery cell testing fixture provided in this application embodiment uses a first transmission mechanism to control several clamping blocks to simultaneously clamp and release the battery cell, improving operational convenience. A second clamping assembly is used to simultaneously clamp and release the battery cell; the back plate of the clamping plate in the second clamping assembly is equipped with heat dissipation fins, further improving heat dissipation. The second transmission mechanism controls several clamping plates to simultaneously clamp and release the battery cell, improving both heat dissipation and operational convenience.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A battery cell testing fixture, characterized in that, include: The device comprises a base, a bracket, and a turntable; the bracket includes a bottom and side walls; a first clamping assembly is provided in the bracket, the first clamping assembly including a first handwheel, a first transmission mechanism, and several clamping blocks connected in sequence; the first handwheel, under the action of driving force, controls the several clamping blocks to clamp or release the battery cell through the first transmission mechanism; A second clamping assembly is provided below the turntable. The second clamping assembly includes a second handwheel, a second transmission mechanism, and several clamping plates connected in sequence. A set of straight grooves is opened at the bottom of the bracket, and a first set of arc-shaped grooves is radially opened on the turntable. The clamping plates are connected to the first set of arc-shaped grooves through connectors. The connectors pass through both the straight grooves and the first set of arc-shaped grooves. Under the action of driving force, the second handwheel controls the several clamping plates to clamp or release the battery cell through the second transmission mechanism. The turntable is provided with a second set of arc-shaped grooves in its circumference; the bracket and the base are provided with mounting holes, and the bracket, the turntable and the base are connected by bolts. The bolts pass through the mounting holes of the bracket, the second set of arc-shaped grooves of the turntable and the mounting holes of the base. The turntable is rotatably disposed between the base and the bracket.

2. The cell testing fixture according to claim 1, characterized in that, The first transmission mechanism includes a first gear, a second gear, a gear ring, several third gears, and several racks that mesh with each other. The first gear is fixedly connected to the first handwheel, the racks are fixedly connected to the clamping block, the clamping block stands at the bottom of the bracket, and the end of the clamping block adjacent to the base is located inside the gear ring.

3. The cell testing fixture according to claim 1, characterized in that, The second transmission mechanism includes a fourth gear and a fifth gear that mesh with each other. The fourth gear is fixedly connected to the second handwheel, and the fifth gear is fixedly connected to the center of the turntable on the same axis.

4. The cell testing fixture according to claim 2, characterized in that, The clamp is mounted on the bottom of the bracket via the connector.

5. The cell testing fixture according to claim 1, characterized in that, The bracket has several guide holes on its side wall, and the connector includes a second end, which is placed in the guide holes.

6. The cell testing fixture according to claim 2, characterized in that, The straight groove and the rack are located inside the gear ring.

7. The cell testing fixture according to claim 1, characterized in that, The clamp is hollow and is used to hold coolant.

8. The cell testing fixture according to claim 1, characterized in that, The back plate of the clamp is provided with fins.

9. The cell testing fixture according to claim 1, characterized in that, The base is equipped with a cooling fan, and the bottom of the bracket and the turntable are equipped with multiple ventilation holes.

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