CN221123649U

CN221123649U - Test fixture

Info

Publication number: CN221123649U
Application number: CN202322614304.4U
Authority: CN
Inventors: 胡春波; 袁铖; 杨伟; 申坤
Original assignee: Xinwangda Power Technology Co ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-06-11
Anticipated expiration: 2033-09-25

Abstract

The utility model provides a test fixture, and relates to the field of battery core fixtures. The test fixture comprises: the base is provided with a test area for placing the shell; the bracket is arranged on the base; the plurality of correction blocks are arranged on one side of the support, facing the test area, and are distributed at intervals around the test area; the correction block comprises a first limit part and a second limit part, the first limit part is used for guiding and matching with the peripheral side surface edge of the top cover, and the second limit part is used for abutting and matching with the side surface outer surface of the shell; the test structure is arranged on one side, far away from the base, of the support and is provided with a crimping part which is used for being in crimping fit with the top cover, and the test structure further comprises a pressure sensor. The assembly position of the top cover and the shell is effectively limited, the shell cover adapting force in the press-fitting process can be quantitatively evaluated, and the edge of the shell is prevented from being deformed easily when the adapting is too tight.

Description

Test fixture

Technical Field

The utility model relates to the technical field of battery core jigs, in particular to a testing jig.

Background

The power battery mainly comprises a positive electrode, a negative electrode, a shell, a top cover, electrolyte and the like. Wherein, the shell and the top cover together form an electrochemical reaction place, and the shell and the top cover are important structural members which are indispensable for forming the battery cell.

During production, the housing and the top cover are typically assembled using an interference fit. Because the machining precision of the structural part is difficult to ensure, the situation of over-loose or over-tight adaptation between the shell and the top cover can occur in practice, and the manufacturing efficiency and the yield are seriously affected. At present, test equipment for quantitatively evaluating the adaptation condition of a shell cover is not available, and the problem that the edge of a shell is easy to deform when the adaptation is too tight cannot be effectively avoided.

Disclosure of utility model

In order to solve the above problems, the present utility model provides a testing fixture to solve the problem that the edge of the housing is easily deformed when the housing is too tightly fitted, without a testing device for quantitatively evaluating the fitting condition of the housing cover.

The technical scheme of the test fixture provided by the utility model is as follows:

the test fixture includes:

the test device comprises a base, wherein a test area for placing a shell is arranged on the base; the support is arranged on the base and is positioned outside the test area;

The plurality of correction blocks are arranged on the bracket and distributed at intervals around the test area; the correction block comprises a first limit part and a second limit part, the first limit part is used for guiding and matching with the edge of the peripheral side face of the top cover, and the second limit part is used for abutting and matching with the outer surface of the side face of the shell;

and the test structure is used for detecting the adapting force of the shell and the top cover.

Further, the test structure is located the support is kept away from one side of base, the test structure is equipped with and is used for pressing the complex crimping portion with the top cap, the test structure still includes pressure sensor to detect the cap adaptation power of pressure equipment in-process.

Further, one side of the correction block away from the support is provided with a boss, one side of the boss, which is close to the base, is detachably provided with a lower limiting block, a distance difference in the plane direction of the base is arranged between the surface of one side of the boss away from the support and the surface of one side of the lower limiting block away from the support, the distance difference is equal to the wall thickness of the shell, the surface of one side of the boss away from the support forms a first limiting part, and the surface of one side of the lower limiting block away from the support forms a second limiting part.

Further, the base is provided with a first direction, a second direction and a third direction, the first direction and the second direction intersect to form a plane where the base is located, and the third direction is perpendicular to the plane where the base is located;

The support comprises two side frames and two vertical rods which are arranged in a split mode, the two side frames are arranged at intervals in parallel to the first direction, the two vertical rods are respectively arranged between the two side frames and are arranged at intervals in parallel to the first direction, and the two side frames and the two vertical rods enclose a test area.

Further, the side frame is an H-shaped frame and comprises two support posts and a middle cross beam, the cross beam is connected between the two support posts, a first guide groove is formed in one side, facing the test area, of the cross beam, the first guide groove extends along a first direction, and at least two correction blocks are slidably mounted in the first guide groove.

Further, the cross beam is further provided with a first long hole and a first scale, the length of the first long hole extends along a first direction, and a fixing bolt is connected between at least two correction blocks and the first long hole of the cross beam;

And/or, be equipped with second guide slot, second slot hole and second scale on the pillar, the second guide slot the second slot hole all extends along the third direction, the tip of crossbeam with second guide slot sliding fit, the crossbeam with bolted connection between the second slot hole of pillar.

Further, a third guide groove, a third long hole and a third scale are arranged on one side of the upright rod, which faces the test area, the third guide groove and the third long hole extend along a third direction, a sliding block is slidably arranged in the third guide groove, and the sliding block is connected with the third long hole of the upright rod through a bolt;

The sliding block is further provided with two transverse sliding rods in a guiding manner, the sliding directions of the two transverse sliding rods are arranged along the first direction, and the end parts of the two transverse sliding rods are fixedly connected with the correction blocks.

Further, two main slideways are arranged on the base, the two main slideways are arranged at intervals in parallel to the second direction, and the side frames are in guide fit with the two main slideways;

the main slide way is also provided with a fourth long hole, the fourth long hole extends along the second direction, and the two side frames are respectively connected with the fourth long hole of the main slide way through bolts.

Further, an inner flange is arranged on one side of the main slideway, a sliding part is arranged at the end part of the side frame corresponding to the base, and the sliding part of the side frame is in concave-convex fit with the main slideway.

Further, the test structure comprises a square pressing plate and a force transmission bolt, wherein four protruding blocks are arranged on the side face of the square pressing plate, facing the base, of the square pressing plate, the four protruding blocks are distributed at four vertex angles of the square pressing plate, the protruding blocks form the compression joint part, the force transmission bolt is fixedly connected to one side, facing away from the base, of the square pressing plate, and the force transmission bolt is in threaded connection with the pressure sensor.

The beneficial effects are that: the test fixture adopts the design form of a base, a bracket and a plurality of correction blocks, wherein the bracket is arranged on the base, and the base is positioned on the inner side of the bracket to form a test area; the shell can be placed in the test area of the base, the opening of the shell faces away from the base, and the top cover to be crimped is positioned and placed at the opening of the shell. Because the test structure is arranged on one side of the support away from the base, the test structure is used for crimping in the direction close to the base, and reliable interference connection is formed between the top cover and the shell under the action of pressure.

Wherein, a plurality of correction blocks are installed towards one side of test area to the support, and the correction block includes first spacing portion and second spacing portion, carries out the direction cooperation to the week side edge of top cap through the first spacing portion of correction block, carries out the butt cooperation to the side surface of casing through the second spacing portion of correction block, utilizes the offset distance of first spacing portion and second spacing portion in the base plane direction, has limited the fitting position between top cap and the casing effectively, has guaranteed that the top cap can be accurately pressed in place.

And moreover, the plurality of correction blocks are distributed at intervals around the test area, namely, the second limiting parts of the plurality of correction blocks respectively form a plurality of abutting acting forces distributed at intervals on the side edge of the shell, so that a constraint effect of preventing expansion deformation is generated on the side edge of the shell. In addition, the test structure of the whole test fixture is also combined with a pressure sensor, so that the adapting force of the shell cover in the press fitting process can be quantitatively evaluated, and the problem that the edge of the shell is easy to deform when the adapting is too tight is effectively avoided.

Drawings

FIG. 1 is a schematic perspective view of a test fixture according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a calibration block in an embodiment of the test fixture of the present utility model;

FIG. 3 is a schematic view of a neutral lever in an embodiment of a test fixture according to the present utility model;

FIG. 4 is a schematic view of a base in an embodiment of a test fixture according to the present utility model;

Fig. 5 is a schematic structural diagram of a test structure in an embodiment of the test fixture of the present utility model.

In the figure: 1-base, 10-main slideway, 11-fourth slot, 12-inner flange, 2-bracket, 20-side frame, 21-cross beam, 22-pillar, 23-upright, 230-third guide slot, 231-third slot, 24-slide block, 25-transverse slide bar, 26-fixing bolt;

3-correction block, 30-boss, 31-first spacing portion, 32-second spacing portion, 33-lower spacing block, 4-test structure, 40-crimping portion, 41-square clamp plate, 42-pressure sensor, 43-force transmission bolt, 5-casing, 6-top cap.

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.

As shown in fig. 1 to 5, the test fixture of the present utility model includes: the test device comprises a base 1, a bracket 2, a plurality of correction blocks 3 and a test structure 4, wherein a test area for placing a shell 5 is arranged on the base 1; the bracket 2 is arranged on the base 1; the plurality of correction blocks 3 are arranged on one side of the support 2 facing the test area, and the plurality of correction blocks 3 are distributed at intervals around the test area; the correction block 3 comprises a first limiting part 31 and a second limiting part 32, the first limiting part 31 and the second limiting part 32 are distributed in a staggered mode in the plane direction of the base 1, the first limiting part 31 is used for guiding and matching with the peripheral side edge of the top cover 6, and the second limiting part 32 is used for abutting and matching with the side outer surface of the shell 5. The test structure 4 is arranged on one side of the support 2 away from the base 1, the test structure 4 is provided with a crimping part 40 which is in crimping fit with the top cover 6, and the test structure 4 also comprises a pressure sensor 42 for detecting the cover adapting force in the press fitting process.

The test fixture adopts the design form of a base 1, a bracket 2, a plurality of correction blocks 3 and a test structure 4, wherein the bracket 2 is arranged on the base 1, and the base 1 is positioned at the inner side of the bracket 2 to form a test area; the housing 5 can be placed in the test area of the base 1, and the opening of the housing 5 faces away from the base 1, and the top cover 6 to be crimped is positioned at the opening of the housing 5. Since the test structure 4 is arranged on one side of the support 2 far away from the base 1, the test structure 4 is crimped in a direction close to the base 1, and a reliable interference connection is formed between the top cover 6 and the shell 5 under the action of pressure.

Wherein, a plurality of correction blocks 3 are installed to one side of support 2 orientation test area, correction block 3 includes first spacing portion 31 and second spacing portion 32, carry out the direction cooperation to the week side edge of top cap 6 through the first spacing portion 31 of correction block 3, carry out the butt cooperation to the side surface of casing 5 through the second spacing portion 32 of correction block 3, utilize the offset distance of first spacing portion 31 and second spacing portion 32 in the plane direction that base 1 is located, the assembly position between top cap 6 and the casing 5 has been effectively restricted, the top cap 6 has been guaranteed that the accurate crimping is put in place.

The plurality of calibration blocks 3 are distributed at intervals around the test area, that is, the second limiting portions 32 of the plurality of calibration blocks 3 form a plurality of abutting forces distributed at intervals on the side edge of the housing 5, so that a restraining effect of preventing expansion deformation is generated on the side edge of the housing 5. In addition, the test structure 4 of the whole test fixture is also combined with the pressure sensor 42, so that the adapting force of the shell cover in the press fitting process can be quantitatively evaluated, and the problem that the edge of the shell 5 is easy to deform when the adapting is too tight is effectively avoided.

In this embodiment, a boss 30 is disposed on a side of the correction block 3 away from the support 2, a lower stopper 33 is detachably mounted on a side of the boss 30 close to the base 1, a distance difference in a plane direction of the base 1 is provided between a surface of the boss 30 away from the support 2 and a surface of the lower stopper 33 away from the support 2, the distance difference is equal to a wall thickness of the housing 5, a surface of the boss 30 away from the support 2 constitutes a first stopper 31, and a surface of the lower stopper 33 away from the support 2 constitutes a second stopper 32. The lower limiting block 33 with corresponding dimension specifications can be replaced according to the battery cell shells with different models, so that the press-fitting requirements of shells 5 with different wall thicknesses can be met. The difference between the distance between the surface of the boss 30 away from the side of the bracket 2 and the surface of the lower limit block 33 away from the side of the bracket 2 is equal to the wall thickness of the shell 5, so that the adaptation precision between the test fixture and the shell cover is improved.

The base 1 has a first direction, a second direction and a third direction, as shown in fig. 1, the first direction is an x direction, the second direction is a y direction, the third direction is a z direction, the first direction and the second direction intersect in a plane of the base 1, and the third direction is perpendicular to the plane of the base 1. It should be noted that, the first direction X and the second direction Y vertically intersect in the plane where the base 1 is located, and the included angle between the first direction X and the second direction Y falls within the protection range defined by "vertical" in the present embodiment in the range of 80 ° to 90 °.

As a further preferred solution, the stand 2 includes two side frames 20 and two upright posts 23 that are separately disposed, the two side frames 20 are disposed at intervals parallel to the first direction X, the two upright posts 23 are respectively disposed between the two side frames 20 and are disposed at intervals parallel to the first direction X, and the two side frames 20 and the two upright posts 23 enclose a test area. The bracket 2 adopts a split type structure of two side frames 20 and two vertical rods 23, the two side frames 20 are arranged at intervals in parallel to the first direction X, the two long sides of the shell cover of the square battery cell can play a role in limiting, and correspondingly, the two vertical rods 23 are positioned at the end parts of the interval positions between the two side frames 20, and can play a role in limiting the two wide sides of the shell cover of the square battery cell, so that the position accuracy of the shell and the top cover of the square battery cell in the press mounting process is ensured.

In this embodiment, the side frame 20 is an H-shaped frame, which includes two struts 22 and a middle cross beam 21, the cross beam 21 is connected between the two struts 22, a first guide groove is disposed on a side of the cross beam 21 facing the test area, the first guide groove extends along a first direction X, and three calibration blocks 3 are slidably mounted in the first guide groove. The cross beam 21 is further provided with a first long hole and a first scale, the length of the first long hole extends along the first direction X, and fixing bolts 26 are connected between the three correction blocks 3 and the first long hole of the cross beam 21. The calibration block 3 can be moved along the first direction X through the first guide groove so as to adjust the abutting position of the calibration block 3, and the housing 5 can be smoothly placed into the test area when moving to the end. In the moving process, whether the abutting position is accurate or not can be determined by comparing with the first scale, and finally the correction block 3 is fixed on the cross beam 21 through the first long hole by the fixing bolt 26.

And, be equipped with second guide slot, second slot hole and second scale on the pillar 22, second guide slot, second slot hole all extend along third direction Z, and the tip and the second guide slot sliding fit of crossbeam 21, bolted connection between the second slot hole of crossbeam 21 and pillar 22. The height of the cross beam 21 can be adjusted in the third direction Z by means of the second guide groove, and it can be determined whether the height of the cross beam 21 matches the height of the housing 5 against the second graduation, and finally the cross beam 21 is fastened to the two struts 22 by means of bolts through the second long holes.

Correspondingly, a third guide groove 230, a third long hole 231 and a third scale are arranged on one side of the upright 23 facing the test area, the third guide groove 230 and the third long hole 231 extend along a third direction Z, a sliding block 24 is slidably arranged in the third guide groove 230, and the sliding block 24 is connected with the third long hole 231 of the upright 23 through bolts; the slide block 24 is also provided with two transverse slide bars 25 in a guiding manner, the sliding directions of the two transverse slide bars 25 are along the first direction X, and the end parts of the two transverse slide bars 25 are fixedly connected with the correction block 3. The height of the slide 24 can be adjusted in the third direction Z by means of the third guide slot 230, and it can be determined whether the height of the slide 24 matches the height of the housing 5 against the third scale, and finally the slide 24 is fixed to the upright 23 by means of bolts penetrating the third long hole 231. The two transverse sliding rods 25 can adjust the position of the correction block 3 along the first direction X, and the transverse sliding rods 25 and the correction block 3 are locked and fixed through bolts, so that the correction block 3 can be accurately abutted against the wide side of the shell 5.

In addition, two main slide ways 10 are arranged on the base 1, the two main slide ways 10 are arranged at intervals in parallel to the second direction Y, and the side frames 20 are in guiding fit with the two main slide ways 10; the main slide 10 is further provided with a fourth long hole 11, the fourth long hole 11 extends along the second direction Y, and the two side frames 20 are respectively connected with the fourth long hole 11 of the main slide 10 by bolts. An inner flange 12 is arranged on one side of the main slideway 10, a sliding part is arranged at the end part of the side frame 20 corresponding to the base 1, the sliding part of the side frame 20 is in concave-convex fit with the main slideway 10, and the inner flange 12 plays a role in preventing the sliding part. The sliding parts of the side frames 20 are assembled on the main slideway 10 in a guiding way, and the width between the two side frames 20 can be flexibly adjusted along the second direction Y so as to adapt to the test requirements of the battery cells with different width sizes.

In addition, the test structure 4 comprises a square pressing plate 41 and a force transmission bolt 43, four protruding blocks are arranged on the side face, facing the base 1, of the square pressing plate 41, the four protruding blocks are distributed at four vertex angles of the square pressing plate 41, the protruding blocks form a press-fit part 40, press-fit is carried out on the four vertex angles of the top cover of the square battery cell through the four protruding blocks, and stability of press-fit assembly between the top cover and the shell is guaranteed. The force transmission bolt 43 is fixedly connected to one side of the square pressing plate 41, which is opposite to the base 1, the force transmission bolt 43 is in threaded connection with the pressure sensor 42, the pressure sensor 42 is a pressure sensor with a threaded hole, and the maximum thrust in the process of putting the top cover into the shell can be detected through the pressure sensor 42.

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

1. A test fixture for detect the adaptation power of electric core cap, electric core include casing (5) and with casing (5) complex top cap (6), characterized by, the test fixture includes:

A base (1), wherein a test area for placing the shell (5) is arranged on the base (1);

The bracket (2) is arranged on the base (1), and the bracket (2) is positioned outside the test area;

a plurality of correction blocks (3), wherein the correction blocks (3) are arranged on the bracket (2), and the correction blocks (3) are distributed at intervals around the test area; the correction block (3) comprises a first limit part (31) and a second limit part (32), the first limit part (31) is used for guiding and matching with the peripheral side edge of the top cover (6), and the second limit part (32) is used for abutting and matching with the outer surface of the side surface of the shell (5);

And the test structure (4) is used for detecting the adapting force of the shell (5) and the top cover (6).

2. The test fixture according to claim 1, characterized in that the test structure (4) is arranged on one side of the support (2) away from the base (1), the test structure (4) is provided with a crimping part (40) for crimping fit with the top cover (6), and the test structure (4) further comprises a pressure sensor (42) for detecting a cover adapting force in the press fitting process.

3. The test fixture according to claim 2, characterized in that a boss (30) is arranged on one side of the correction block (3) away from the support (2), a lower limit block (33) is detachably arranged on one side of the boss (30) close to the base (1), a distance difference in the plane direction of the base (1) is arranged between the surface of the boss (30) away from one side of the support (2) and the surface of the lower limit block (33) away from one side of the support (2), the distance difference is equal to the wall thickness of the shell (5), the surface of the boss (30) away from one side of the support (2) forms a first limit part (31), and the surface of the lower limit block (33) away from one side of the support (2) forms a second limit part (32).

4. A test fixture according to claim 3, wherein the base (1) has a first direction (X), a second direction (Y) and a third direction (Z), the first direction (X) and the second direction (Y) intersecting to form a plane in which the base (1) is located, and the third direction (Z) is perpendicular to the plane in which the base (1) is located;

The support (2) comprises two side frames (20) and two vertical rods (23) which are arranged in a split mode, the two side frames (20) are arranged in parallel with the first direction (X) at intervals, the two vertical rods (23) are respectively arranged between the two side frames (20) and are arranged in parallel with the first direction (X) at intervals, and the two side frames (20) and the two vertical rods (23) enclose a test area.

5. The test fixture according to claim 4, characterized in that the side frame (20) is an H-shaped frame comprising two struts (22) and a middle cross beam (21), the cross beam (21) is connected between the two struts (22), a first guide groove is provided on a side of the cross beam (21) facing the test area, the first guide groove extends along a first direction (X), and at least two correction blocks (3) are slidably mounted in the first guide groove.

6. The test fixture according to claim 5, characterized in that the cross beam (21) is further provided with a first long hole and a first scale, the length of the first long hole extends along a first direction (X), and a fixing bolt (26) is connected between at least two correction blocks (3) and the first long hole of the cross beam (21);

And/or be equipped with second guide slot, second slot hole and second scale on pillar (22), the second guide slot the second slot hole all extends along third direction (Z), the tip of crossbeam (21) with second guide slot sliding fit, crossbeam (21) with bolted connection between the second slot hole of pillar (22).

7. The test fixture according to claim 4, wherein a third guide groove (230), a third long hole (231) and a third scale are arranged on one side of the upright (23) facing the test area, the third guide groove (230) and the third long hole (231) extend along a third direction (Z), a sliding block (24) is slidably arranged in the third guide groove (230), and the sliding block (24) is connected with the third long hole (231) of the upright (23) through a bolt;

Two transverse sliding rods (25) are further arranged on the sliding block (24) in a guiding mode, the sliding directions of the two transverse sliding rods (25) are arranged along the first direction (X), and the end portions of the two transverse sliding rods (25) are fixedly connected with the correction blocks (3).

8. The test fixture according to claim 4, wherein the base (1) is provided with two main slides (10), the two main slides (10) are arranged at intervals parallel to the second direction (Y), and the side frames (20) are in guiding fit with the two main slides (10);

The main slide way (10) is also provided with a fourth long hole (11), the fourth long hole (11) extends along the second direction (Y), and the two side frames (20) are respectively connected with the fourth long hole (11) of the main slide way (10) through bolts.

9. The test fixture according to claim 8, wherein an inner flange (12) is provided on one side of the main slide (10), a sliding portion is provided at an end portion of the side frame (20) corresponding to the base (1), and the sliding portion of the side frame (20) is in concave-convex fit with the main slide (10).

10. The test fixture according to claim 2, characterized in that the test structure (4) comprises a square pressing plate (41) and a force transmission bolt (43), the side surface of the square pressing plate (41) facing the base (1) is provided with four protruding blocks, the four protruding blocks are distributed at four vertex angles of the square pressing plate (41), the protruding blocks form the press joint part (40), the force transmission bolt (43) is fixedly connected to one side of the square pressing plate (41) facing away from the base (1), and the force transmission bolt (43) is in threaded connection with the pressure sensor (42).