CN220626614U - Testing device - Google Patents

Abstract

The utility model relates to the technical field of battery manufacturing equipment, and discloses a testing device which is used for testing an electric core and comprises a pressure bearing piece, a pressurizing mechanism and a testing mechanism; the pressure-bearing piece is used for placing the battery cell and is provided with a positioning hole penetrating along the first direction; the pressurizing mechanism comprises a first driving piece and a pressurizing piece, the pressurizing piece is positioned in the first direction of the pressure bearing piece, and the first driving piece is connected with the pressurizing piece and can drive the pressurizing piece to be close to the pressure bearing piece along the first direction so as to enable the pressurizing piece to be in contact with the battery cell; the test mechanism comprises a second driving piece and a test piece, the test piece is positioned on one side of the pressure-bearing piece, which is away from the pressure-bearing piece, and the second driving piece is connected with the test piece and can drive the test piece to pass through the positioning hole along the first direction so as to contact the test piece with the battery cell; the utility model can avoid the situation of bad test and improve the test accuracy.

Description

Testing device

Technical Field

The utility model relates to the technical field of battery manufacturing equipment, in particular to a testing device.

Background

In the production process of the battery, dust particles possibly are involved in the production and manufacturing process of the battery core, or the battery core is damaged in the transportation process, so that the internal structure of the battery core is pierced, the battery core is short-circuited and ignited, and immeasurable losses are caused to personal safety and personal property; therefore, detecting whether the battery cell is shorted is an indispensable function in battery production and manufacturing.

The testing mechanism of the current cell short circuit testing device is integrated on the pressurizing mechanism, when the pressurizing mechanism presses the cell, the testing mechanism moves along with the pressurizing mechanism to contact the lug of the cell, so that the short circuit test of the cell is realized, but because the testing mechanism moves along with the movement of the pressurizing mechanism, the testing mechanism easily damages the lug of the cell when the testing mechanism is pressed in the moving process, and the problems of poor test and low test accuracy are caused.

Disclosure of Invention

The utility model aims to provide a testing device which can avoid poor testing and improve testing accuracy.

In order to achieve the above object, the present utility model provides a testing device for testing a battery cell, including a pressure bearing member, a pressurizing mechanism and a testing mechanism; the pressure-bearing piece is used for placing the battery cell and is provided with a positioning hole penetrating along a first direction; the pressurizing mechanism comprises a first driving piece and a pressurizing piece, the pressurizing piece is positioned in the first direction of the pressure-bearing piece, and the first driving piece is connected with the pressurizing piece and can drive the pressurizing piece to approach the pressure-bearing piece along the first direction so as to contact the pressurizing piece with the battery cell; the testing mechanism comprises a second driving piece and a testing piece, wherein the testing piece is positioned on one side, away from the pressure-bearing piece, of the pressure-bearing piece, the second driving piece is connected with the testing piece and can drive the testing piece to pass through the positioning hole along the first direction so as to enable the testing piece to be in contact with the battery cell.

In some embodiments, the pressing member includes a pressing plate, the first driving member has a first output end, and the pressing plate is connected to the first output end; the electric core can be compressed by the pressing plate and shaped.

In some embodiments, the pressing member further includes a smoothing block connected to an end of the pressing plate facing the pressure bearing member, and a position of the smoothing block corresponds to a position of the positioning hole; the smoothing block is adopted to contact and press the lug of the battery cell so that the lug is attached to the pressure-bearing piece.

In some embodiments, the pressing member further includes a first fastener, the pressing plate is provided with a first mounting hole, the smoothing block is provided with a second mounting hole, and the first fastener penetrates into the first mounting hole and the second mounting hole along the first direction to connect the smoothing block to the pressing plate; adopt first fastener first mounting hole with the second mounting hole can with smooth the piece can dismantle connect in on the clamp plate, be convenient for smooth the piece with install between the clamp plate and dismantle to be convenient for change the smooth piece of equidimension in order to adapt to the processing demand of the electric core of different specifications.

In some embodiments, the pressurizing member further includes a guide plate and a first guide rod, where the guide plate is fixedly connected to the first driving member and is located at a side of the pressing plate away from the pressure bearing member, a first guide hole penetrating along the first direction is formed in the guide plate, and one end of the first guide rod is connected to the pressing plate, and the other end of the first guide rod extends away from the pressure bearing member and penetrates through the first guide hole; adopt the deflector with first guide bar, and the deflector is in the provision of confession first guide bar driven first guiding hole makes first guide bar can be in the removal in-process of clamp plate plays the guide effect, so that the clamp plate can accurately pressurize to the preset position of electric core.

In some embodiments, the test mechanism further comprises a fixing member connected to an end of the pressure member facing away from the pressure member, and the second driving member is connected to the fixing member; the fixing piece is adopted to install the second driving piece on one side, away from the pressure-bearing piece, of the pressure-bearing piece.

In some embodiments, the fixing member includes a first fixing portion and a second fixing portion connected to the first fixing portion, and the second driving member is connected to the second fixing portion;

the testing mechanism further comprises a second fastening piece, the first fixing part is provided with a third mounting hole penetrating along the first direction, the pressure-bearing piece is provided with a fourth mounting hole, and the second fastening piece penetrates into the third mounting hole and the fourth mounting hole along the first direction so as to connect the fixing piece with the pressure-bearing piece; the second fastening piece, the third mounting hole and the fourth mounting hole are adopted to detachably connect the fixing piece with the pressure-bearing piece, so that the fixing piece and the pressure-bearing piece can be conveniently mounted and dismounted.

In some embodiments, the test piece includes a connection block, a second guide bar, and a test probe; the second driving piece is provided with a second output end, the connecting block is connected to the second output end, the second guide rod is connected to one end of the connecting block, which faces the pressure bearing piece, and the test probe is connected to one end of the second guide rod, which faces away from the connecting block, and can pass through the positioning hole along the first direction.

In some embodiments, the connecting block is provided with a second guide hole penetrating in the first direction; the second guide rod comprises a head and a rod part, one end of the rod part is connected to the test probe, the other end of the rod part is away from the test probe and is connected to the head through the second guide hole, and one side of the head, facing towards the connecting block, is abutted to one side of the connecting block, away from the test probe; the test piece further comprises an elastic piece, the elastic piece is sleeved on the rod part, and two opposite ends of the elastic piece along the first direction are respectively abutted to one side of the connecting block, which faces the test probe, and one side of the connecting block, which faces the test probe; adopt the connecting block sets up the second guiding hole, and the second guide bar sets up the head with pole portion, and will the elastic component cover is located on the pole portion, when test probe butt in the utmost point ear of electric core, the elastic component can play the cushioning effect, in order to avoid test probe crush damage the utmost point ear of electric core.

In some embodiments, the test piece further comprises a test wire, one end of the test wire is connected to the test probe, and the second guide rod is provided with a wire through hole penetrating along the first direction and allowing the test wire to penetrate; the mode that the wire passing holes are formed in the second guide holes is adopted, a wire passing channel can be reserved for the test wire, and the test wire is guided and protected.

Compared with the prior art, the battery cell short circuit testing device provided by the utility model has the beneficial effects that: through set up on the pressure-bearing piece the locating hole, the locating hole can be right the electric core is in place of pressure-bearing piece plays the location effect in order to make the utmost point ear of electric core with the position of locating hole corresponds, can drive through first driving piece the pressurization piece butt in on the electric core of pressure-bearing piece, in order to will the electric core is pressed steadily to be fixed on the pressure-bearing piece, avoid the electric core appears moving in the test process, can drive through the second driving piece the test piece pass the locating hole contact in on the utmost point ear of electric core to carry out the short circuit test to the electric core, the locating hole is in the moving process of test piece can play the guide effect in order to make the test piece can be accurate contact in on the utmost point ear of electric core, avoid appearing testing failure, improve the accuracy of test.

Drawings

FIG. 1 is a block diagram of a cell short circuit test device according to an embodiment of the present utility model;

fig. 2 is a front view of a device for testing a short circuit of a battery cell according to an embodiment of the present utility model;

fig. 3 is a side view of a device for testing a short circuit of a battery cell according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a smoothing block according to an embodiment of the present utility model when the smoothing block abuts against a battery cell;

FIG. 5 is a schematic diagram of connection between a pressure bearing member and a testing mechanism according to an embodiment of the present utility model;

FIG. 6 is a block diagram of a pressure bearing member provided by an embodiment of the present utility model;

FIG. 7 is a block diagram of a pacifier block provided by an embodiment of the present utility model;

FIG. 8 is a bottom view of a pacifier block provided by an embodiment of the present utility model;

FIG. 9 is a block diagram of a test mechanism provided by an embodiment of the present utility model;

fig. 10 is a schematic connection diagram of the second driving member and the connection block according to the embodiment of the present utility model.

Reference numeral 1, a pressure-bearing member; 11. positioning holes; 12. a fourth mounting hole; 13. a second fixing groove;

2. a pressurizing mechanism; 21. a first driving member; 22. a pressurizing member; 211. a first output terminal; 221. a pressing plate; 222. smoothing the block; 223. a guide plate; 224. a first guide bar; 2211. a first mounting hole; 2212. a first fixing groove; 2221. a second mounting hole;

3. a testing mechanism; 31. a second driving member; 32. a test piece; 33. a fixing member; 311. a second output terminal; 321. a connecting block; 322. a second guide bar; 323. a test probe; 324. testing the wire; 325. an elastic member; 331. a first fixing portion; 332. a second fixing portion; 3311. a third mounting hole; 3211. a second guide hole; 3221. a head; 3222. a stem portion; 3220. a wire through hole;

4. a battery cell; 41. a first tab; 42. a second lug;

z, a first direction; x, second direction; y, third direction.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Unless defined otherwise, 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 utility model belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the embodiments of the present utility model, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity.

Referring to fig. 1-8, a testing device provided by an embodiment of the present utility model is used for testing a battery cell, and includes a pressure bearing member 1, a pressurizing mechanism 2 and a testing mechanism 3; the pressure-bearing piece 1 is used for placing the battery cell 4, and the pressure-bearing piece 1 is provided with a positioning hole 11 penetrating along a first direction Z; the pressing mechanism 2 comprises a first driving piece 21 and a pressing piece 22, the pressing piece 22 is positioned in a first direction Z of the voltage bearing piece 1, and the first driving piece 21 is connected with the pressing piece 22 and can drive the pressing piece 22 to approach the voltage bearing piece 1 along the first direction Z so as to contact the pressing piece 22 with the battery cell 4; the test mechanism 3 comprises a second driving member 31 and a test member 32, the test member 32 is located on the side of the pressure bearing member 1 facing away from the pressure applying member 22, and the second driving member 31 is connected with the test member 32 and is capable of driving the test member 32 in a first direction Z through the positioning hole 11 to bring the test member 32 into contact with the cell 4.

Based on this technical scheme, through setting up locating hole 11 on pressure-bearing piece 1, locating hole 11 can play the location effect to the placing of electric core 4 at pressure-bearing piece 1 in order to make the utmost point ear of electric core 4 correspond with the position of locating hole 11, can drive on the electric core 4 of pressure-bearing piece 1 through first driving piece 21 pressure-applying piece 22, in order to fix electric core 4 on pressure-bearing piece 1 firmly, avoid electric core 4 to appear moving in the test process, can drive test piece 32 through locating hole 11 to contact on the utmost point ear of electric core 4 and carry out the short circuit test to electric core 4 through the second driving piece 31, locating hole 11 can play the direction effect in the removal in-process of test piece 32 in order to make test piece 32 can be accurate contact on the utmost point ear of electric core 4, avoid appearing testing failure, improve the accuracy of test.

The first driving member 21 may be any device or means capable of performing a function of driving the pressing member 22 to approach the pressing member 1 in the first direction Z, such as a motor, a cylinder, an oil cylinder, or the like, and is not limited herein.

The second driving member 31 may be any device or apparatus capable of driving the test piece 32 through the positioning hole 11 in the first direction Z, such as a motor, a cylinder, an oil cylinder, or the like, which is not limited herein.

In this embodiment, the first direction Z is a Z-axis direction, the second direction X is an X-axis direction, and the third direction Y is a Y-axis direction.

The tab of the battery cell 4 includes a first tab 41 and a second tab 42.

In some implementations, the first tab 41 is a positive tab and the second tab 42 is a negative tab.

In other embodiments, the first tab 41 is a negative tab and the second tab 42 is a positive tab.

Referring to fig. 5, in the present embodiment, the pressure receiving member 1 has a plate-like structure with a thickness.

In the present embodiment, the positioning hole 11 is a bar-shaped hole provided in the pressure receiving member 1.

The pressure piece 1 is provided with a fourth mounting hole 12 for connecting the test mechanism 3.

The number of the fourth mounting holes 12 is multiple, and the plurality of the fourth mounting holes 12 can be used for connecting the testing mechanism 3 with the fourth mounting holes 12 at preset mounting positions according to the requirements so as to adjust the positions of the testing mechanism 3 and meet the processing requirements of the battery cells 4 with various specifications.

In the present embodiment, the plurality of fourth mounting holes 12 are sequentially distributed in a straight line shape.

In this embodiment, the side of the pressure receiving member 1 facing away from the pressure applying member 22 is provided with a second fixing groove 13, the second fixing groove 13 is linear, and the fourth mounting hole 12 is provided in the second fixing groove 13.

The pressing member 22 includes a pressing plate 221, a smoothing block 222, a first fastener (not shown), a guide plate 223, and a first guide rod 224.

The first driving member 21 has a first output end 211, and the pressing plate 221 is connected to the first output end 211. The use of the pressing plate 221 can press the battery cell 4 and shape the battery cell 4.

The pressing member 22 further includes a smoothing block 222, the smoothing block 222 is connected to an end of the pressing plate 221 facing the pressing member 1, and a position of the smoothing block 222 corresponds to a position of the positioning hole 11. The smoothing block 222 is adopted to contact and press the tab of the battery cell 4 so that the tab can be attached to the pressure-bearing piece 1.

The pressure plate 221 is provided with a first mounting hole 2211, the leveling block 222 is provided with a second mounting hole 2221, and a first fastener penetrates the first mounting hole 2211 and the second mounting hole 2221 in the first direction Z to connect the leveling block 222 to the pressure plate 221. Adopt first fastener, first mounting hole 2211 and second mounting hole 2221 can be with smooth piece 222 detachable connection on clamp plate 221, be convenient for smooth the installation and dismantle between piece 222 and the clamp plate 221 to be convenient for change the processing demand of the electric core 4 of different sizes of smooth piece 222 in order to adapt to different specifications.

The first fastener may be any fastener capable of penetrating the first and second mounting holes 2211 and 2221 to connect the smoothing block 222 to the pressing plate 221, such as a bolt, a screw, a pin, etc., without limitation.

The number of the first mounting holes 2211 may be one or more.

Preferably, the number of the first mounting holes 2211 is multiple, and the plurality of first mounting holes 2211 can be used for connecting the smoothing block 222 with the first mounting holes 2211 with preset connection positions through the first fasteners according to requirements so as to adjust the positions of the smoothing block 222 to meet the processing requirements of the battery cells 4 with various specifications.

In this embodiment, the plurality of first mounting holes 2211 are sequentially distributed in a straight line shape.

In other embodiments, the plurality of first mounting holes 2211 may be distributed in any shape, which is not limited herein.

In the present embodiment, the pressing plate 221 is provided with a first fixing groove 2212 on a side facing the pressing member 22, the first fixing groove 2212 is in a straight line shape, and the first mounting hole 2211 is disposed in the first fixing groove 2212.

The guide plate 223 is fixedly connected to the first driving piece 21 and is positioned at one side of the pressing plate 221 away from the pressure bearing piece 1, a first guide hole penetrating along the first direction Z is formed in the guide plate 223, one end of the first guide rod 224 is connected to the pressing plate 221, and the other end of the first guide rod 224 extends away from the pressure bearing piece 1 and penetrates through the first guide hole. The guide plate 223 and the first guide rod 224 are adopted, and the first guide hole for the first guide rod 224 to pass through is formed in the guide plate 223, so that the first guide rod 224 can play a guide role in the moving process of the pressing plate 221, and the pressing plate 221 can be accurately pressed to the preset position of the battery cell 4.

Referring to fig. 5, 9 and 10, the testing mechanism 3 further includes a fixing member 33, a second fastening member (not shown); the test piece 32 includes a connection block 321, a second guide bar 322, and a test probe 323; the fixing member 33 is connected to an end of the pressure-receiving member 1 facing away from the pressure-applying member 22, and the second driving member 31 is connected to the fixing member 33. The fixing member 33 includes a first fixing portion 331 and a second fixing portion 332 connected to the first fixing portion 331, the second driving member 31 is connected to the second fixing portion 332, the first fixing portion 331 is provided with a third mounting hole 3311 penetrating along the first direction Z,

the second fastener is threaded into the third mounting hole 3311 and the fourth mounting hole 12 in the first direction Z to connect the fixing member 33 to the pressure-receiving member 1. The fixing member 33 can be detachably connected to the pressure-bearing member 1 by using the second fastening member, the third mounting hole 3311 and the fourth mounting hole 12, so that the fixing member 33 and the pressure-bearing member 1 can be conveniently mounted and dismounted. The third mounting holes 3311 and the fourth mounting holes 12 are matched, so that the fixing piece 33 can be connected with the fourth mounting holes 12 at the preset mounting positions through the second fastening piece according to the requirements, the position of the test piece 32 can be adjusted, and the test requirements of the battery cells 4 with various specifications can be met.

The second fastening member may be any fastening member capable of penetrating the third mounting hole 3311 and the fourth mounting hole 12 to attach the fixing member 33 to the pressure-receiving member 1, such as a bolt, a screw, a pin, etc., without limitation.

The second driving member 31 has a second output end 311, a connection block 321 is connected to the second output end 311, a second guide rod 322 is connected to an end of the connection block 321 facing the pressure bearing member 1, and a test probe is connected to an end of the second guide rod 322 facing away from the connection block 321 and capable of passing through the positioning hole 11 along the first direction Z. Adopt connecting block 321, second guide bar 322 and test probe 323, connect in the second drive piece through connecting block 321, connect connecting block 321 and test probe 323 respectively through second guide bar 322, pass through test probe 323 in order to carry out the short circuit test of electric core 4.

The connecting block 321 is provided with a second guide hole 3211 penetrating in the first direction Z; the second guide rod 322 comprises a head 3221 and a rod 3222, one end of the rod 3222 is connected to the test probe 323, the other end of the rod 3222 is away from the test probe 323 and is connected to the head 3221 through the second guide hole 3211, and one side of the head 3221, which faces the connecting block 321, is abutted against one side of the connecting block 321, which faces away from the test probe 323; the test piece 32 further includes an elastic member 325, the elastic member 325 is sleeved on the rod portion 3222, and opposite ends of the elastic member 325 along the first direction Z respectively abut against one side of the connection block 321 facing the test probe 323 and one side of the test probe 323 facing the connection block 321. Adopt to set up the second guiding hole 3211 at connecting block 321 to set up head 3221 and pole portion 3222 at second guide bar 322, and locate pole portion 3222 with the elastic component 325 cover, when test probe 323 butt in the utmost point ear of electric core 4, elastic component 325 can play the cushioning effect, in order to avoid test probe 323 to press the utmost point ear of damaging electric core 4.

The elastic member 325 may be any elastic member such as a compression spring, an extension spring, etc., and is not limited herein.

The test piece 32 further includes a test wire 324, one end of the test wire 324 is connected to the test probe 323, and the second guide rod 322 is provided with a via 3220 penetrating along the first direction Z and through which the test wire 324 penetrates. Test probe 323 is powered and signally connected using test wires 324. By arranging the wire passing holes 3220 in the second guide holes 3211, a wire passing channel can be reserved for the test wires 324, so as to guide and protect the test wires 324.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (10)

1. A test device for testing a cell (4), comprising:

the pressure-bearing piece (1) is used for placing the battery cell (4) and is provided with a positioning hole (11) penetrating along a first direction (Z);

the pressurizing mechanism (2) comprises a first driving piece (21) and a pressurizing piece (22), wherein the pressurizing piece (22) is positioned in the first direction (Z) of the pressure-bearing piece (1), and the first driving piece (21) is connected with the pressurizing piece (22) and can drive the pressurizing piece (22) to approach the pressure-bearing piece (1) along the first direction (Z) so as to enable the pressurizing piece (22) to be in contact with the battery cell (4);

the testing mechanism (3) comprises a second driving piece (31) and a testing piece (32), wherein the testing piece (32) is positioned on one side, deviating from the pressurizing piece (22), of the pressure-bearing piece (1), and the second driving piece (31) is connected with the testing piece (32) and can drive the testing piece (32) to pass through the positioning hole (11) along the first direction (Z) so as to enable the testing piece (32) to be contacted with the battery cell (4).

2. The test device according to claim 1, wherein the pressing member (22) comprises a pressing plate (221), the first driving member (21) having a first output end (211), the pressing plate (221) being connected to the first output end (211).

3. The test device according to claim 2, wherein the pressing member (22) further comprises a smoothing block (222), the smoothing block (222) is connected to an end of the pressing plate (221) facing the pressure-bearing member (1), and a position of the smoothing block (222) corresponds to a position of the positioning hole (11).

4. A testing device according to claim 3, wherein the pressing member (22) further comprises a first fastener, the pressing plate (221) is provided with a first mounting hole (2211), the leveling block (222) is provided with a second mounting hole (2221), and the first fastener penetrates into the first mounting hole (2211) and the second mounting hole (2221) along the first direction (Z) to connect the leveling block (222) to the pressing plate (221).

5. The testing device according to any one of claims 2-4, wherein the pressing member (22) further comprises a guide plate (223) and a first guide rod (224), the guide plate (223) is fixedly connected to the first driving member (21) and is located at one side of the pressing plate (221) away from the pressing member (1), a first guide hole penetrating along the first direction (Z) is formed in the guide plate (223), and one end of the first guide rod (224) is connected to the pressing plate (221), and the other end of the first guide rod extends away from the pressing member (1) and penetrates through the first guide hole.

6. A testing device according to any one of claims 1-4, wherein the testing mechanism (3) further comprises a fixing member (33), the fixing member (33) being connected to an end of the pressure member (1) facing away from the pressure member (22), the second driving member (31) being connected to the fixing member (33).

7. The test device according to claim 6, wherein the fixing member (33) comprises a first fixing portion (331) and a second fixing portion (332) connected to the first fixing portion (331), the second driving member (31) being connected to the second fixing portion (332);

the testing mechanism (3) further comprises a second fastening piece, the first fixing portion (331) is provided with a third mounting hole (3311) penetrating along the first direction (Z), the pressure-bearing piece (1) is provided with a fourth mounting hole (12), and the second fastening piece penetrates into the third mounting hole (3311) and the fourth mounting hole (12) along the first direction (Z) so as to connect the fixing piece (33) to the pressure-bearing piece (1).

8. The test device according to claim 1, wherein the test piece (32) comprises a connection block (321), a second guide bar (322) and a test probe (323); the second driving piece (31) is provided with a second output end (311), the connecting block (321) is connected to the second output end (311), the second guide rod (322) is connected to one end of the connecting block (321) facing the pressure-bearing piece (1), and the test probe (323) is connected to one end of the second guide rod (322) facing away from the connecting block (321) and can penetrate through the positioning hole (11) along the first direction (Z).

9. The testing device according to claim 8, wherein the connection block (321) is provided with a second guiding hole (3211) penetrating in the first direction (Z);

the second guide rod (322) comprises a head (3221) and a rod part (3222), one end of the rod part (3222) is connected to the test probe (323), the other end of the rod part faces away from the test probe (323) and penetrates through the second guide hole (3211) to be connected to the head (3221), and one side of the head (3221) facing the connecting block (321) is abutted to one side of the connecting block (321) facing away from the test probe (323);

the test piece (32) further comprises an elastic piece (325), the elastic piece (325) is sleeved on the rod portion (3222), and two opposite ends of the elastic piece (325) along the first direction (Z) are respectively abutted to one side of the connecting block (321) towards the test probe (323) and one side of the test probe (323) towards the connecting block (321).

10. The test device according to claim 8 or 9, wherein the test piece (32) further comprises a test wire (324), one end of the test wire (324) is connected to the test probe (323), and the second guide rod (322) is provided with a wire passing hole (3220) penetrating along the first direction (Z) and allowing the test wire (324) to penetrate.