CN205066620U - Electricity core external dimension detection device - Google Patents

Abstract

The utility model provides a battery appearance dimension detection device, which comprises: a bottom plate, which is fixed; and a positioning plate. It is used to place the electric core and is fixedly arranged above the bottom plate; the guide rail mechanism is arranged on the bottom plate; the tab receiving mechanism can be set up and down in the vertical direction on the rear side of the width direction of the positioning plate, and is used to accommodate the electric core. The lugs are used to detect the length and width specifications of the tabs; and the cell positioning mechanism is installed on the positioning plate and connected with the guide rail mechanism, which can move on the positioning plate along the guide rail mechanism, and is used to fix the cell to detect the appearance size of the cell , and the cell positioning mechanism performs positioning based on the center of the cell. The cell positioning mechanism can position the cell from both sides of the length direction on the positioning plate based on the center of the cell and detect the appearance size of the cell. The tab receiving mechanism can position the cell after the cell positioning mechanism positions the cell. Move up and accommodate the tab of the battery cell, and detect the appearance size of the tab of the battery cell.

Description

Cell Appearance Dimensions Inspection Device

technical field

The utility model relates to the field of secondary batteries, in particular to a device for detecting the appearance size of electric cores.

Background technique

In related technologies, soft-pack lithium batteries are widely used as energy storage devices for consumer electronics products, and the market competition is fierce. The major lithium battery production companies in the world have continuously explored and improved the performance and manufacturing process of soft-pack lithium batteries. Improve.

In the production process of soft-pack lithium batteries, there are strict requirements on the appearance and size of batteries. In order to ensure that the appearance and dimensions of soft-pack lithium batteries do not exceed the given specification range, the appearance and dimensions of all batteries need to be checked during the production process. At present, because the outline of the soft-pack lithium battery is not regular enough, it is easy to deform under force, and it is difficult to realize image detection. The optical detection method used at this stage is difficult to apply to the batch detection of batteries due to its strict requirements on fixtures, high cost, and low detection efficiency. Therefore, at present, major manufacturers of soft-pack lithium batteries in China use manually-operated fixtures to check the appearance and size of batteries. For batteries based on the side of the main body of the battery, the design of the appearance dimension inspection jig is relatively mature and has been widely used in actual production. However, some batteries with special requirements require the center of the main body of the battery as the benchmark. Because of the particularity of the benchmark, there are also high requirements for the design of the fixture. The biggest defect of the currently developed testing device is that it is not easy to operate. low efficiency.

Utility model content

In view of the problems existing in the background technology, the purpose of this utility model is to provide a cell exterior size detection device, which can detect the length and width specifications of the cell and its lugs based on the center of the cell body.

In order to achieve the above purpose, the utility model provides a battery appearance size detection device, which includes: a bottom plate, fixed; a positioning plate, used to place the battery cell, fixed above the bottom plate; a guide rail mechanism, set on the bottom plate Above; the tab receiving mechanism can be arranged on the rear side of the positioning plate in the width direction up and down in the up and down direction, and is used to accommodate the tab of the battery to detect the length and width specifications of the tab; and the positioning mechanism of the battery is installed It is on the positioning plate and connected with the guide rail mechanism, and can move on the positioning plate along the guide rail mechanism. It is used to fix the battery cell to detect the appearance size of the battery cell, and the battery cell positioning mechanism uses the center of the battery cell as a reference for positioning.

The beneficial effects of the present utility model are as follows: in the electric core appearance size detection device according to the present utility model, the electric core positioning mechanism can move on the positioning plate along the guide rail mechanism, and the space for placing the electric core can be reserved on the positioning plate, And it can position the cell from both sides of the length direction based on the center of the cell, and then detect the appearance size of the cell based on the center of the cell; the tab receiving mechanism can position the cell after the cell positioning mechanism has positioned the cell By lifting up and down, the tabs of the battery core are accommodated, and then the appearance size of the tabs of the battery core is detected.

Description of drawings

Fig. 1 is a perspective view of a battery appearance dimension detection device according to the utility model;

Fig. 2 is an exploded view of the cell exterior size detection device according to the utility model;

Fig. 3 is a right view of the battery exterior dimension detection device according to the utility model;

Fig. 4 is a plan view cut along the line A-A of the battery exterior dimension detection device in Fig. 3;

Fig. 5 is a top view of the cell exterior dimension detection device according to the utility model;

Fig. 6 is a plan view cut along the line B-B of the battery exterior dimension detection device in Fig. 5;

Wherein, the reference signs are explained as follows:

1 Bottom plate 58 right guide block

11 front groove 581 bottom right

12 rear groove 5811 right concave hole

2 Positioning plate 582 right side wall

21 left opening 583 right convex plate

22 right opening 59 right guiding roller

23 Front boss 5A right fixing block

24 rear boss 5A1 right through hole

25 notch 5B right guide rod

3 guide rail mechanism 5C right guide spring

31 left guide rail 6 control mechanism

32 left slider 61 bracket

33 Right guide rail 611 Bracket bottom wall

34 right slider 612 bracket outer wall

35 middle rail 62 cam

36 middle slider 63 handle

37 guide rail pad 64 connecting rod

4-pole lug accommodation mechanism 65 plane cam

41 fixed frame 651 contact curved surface

411 two side walls 6511 first plane

412 top wall 6512 convex surface

4121 first through hole 6513 second plane

42 guide rod 66 linkage plate

43 guide bearing 661 body part

44 lug spring 662 connection part

45 storage block 67 guide plate

451 lug groove 671 left opening

452 second through hole 6711 left straight opening

46 roller mounting frame 6712 left bending opening

47 lug with roller 672 right opening

5 cell positioning mechanism 6721 right straight opening

51 left clamping block 6722 right bent opening

511 left body part 673 front concave hole

512 left convex part 68 tail plate

52 left guide block 681 third through hole

521 left bottom 69 front fixed block

5211 Left concave hole 6A front guide rod

522 left side wall 6B front guide spring

523 left convex plate 7 centering adjustment block

53 left guide roller 71 waist hole

54 left fixed block 72 threaded hole

541 left through hole 8 rods

55 left guide rod B cell

56 left guide spring L length direction

57 right clamping block W width direction

571 right body part H up and down direction

572 Right Convex

detailed description

The battery exterior size detection device of the present invention will be described in detail below with reference to the accompanying drawings.

In the course of the description, expressions of indicating directions (such as up, down, left, right, front, and rear) for explaining the structure and operation of each part of the card are relative rather than absolute. They depend on the orientation of the components as shown in the figures, and as the orientation of the components changes, the interpretation changes corresponding to the change in orientation.

Referring to Fig. 1 to Fig. 6, according to the utility model, the detection device for battery appearance size includes: base plate 1, which is fixed; positioning plate 2, which is used to place battery B, and is fixedly arranged above the base plate 1; guide rail mechanism 3, It is arranged on the bottom plate 1; the lug receiving mechanism 4 can be arranged on the rear side of the width direction of the positioning plate 2 up and down along the vertical direction H, and is used to accommodate the lug of the battery cell B to detect the length and width specifications of the lug; And the cell positioning mechanism 5, which is installed on the positioning plate 2 and connected with the guide rail mechanism 3, can move on the positioning plate 2 along the guide rail mechanism 3, and is used to fix the cell B to detect the appearance size of the cell B, and the cell The positioning mechanism 5 performs positioning based on the center of the battery cell B.

In the detection device for battery appearance size according to the utility model, the battery positioning mechanism 5 can move on the positioning plate 2 along the guide rail mechanism 3, and can reserve a space for the battery B to be placed in the positioning plate 2, and can use The center of the cell B is used as the reference to position the cell B from both sides of the length direction L, and then the appearance size of the cell B is detected based on the center of the cell B; After the cell B is positioned, the tabs of the cell B are accommodated by lifting up and down, and then the appearance size of the tabs of the cell B is detected.

In the battery exterior size detection device according to the utility model, referring to FIG. 2 , in one embodiment, the lug accommodation mechanism 4 includes a fixed frame 41, two guide rods 42, two guide bearings 43, two lugs Spring 44, accommodating block 45, roller mounting frame 46 and roller 47 for tab are used. The fixed frame 41 is arranged on the rear side of the width direction W of the positioning plate 2, and has: two side walls 411, which are respectively fixedly connected to both sides of the length direction L of the bottom plate 1; and a top wall 412, whose horizontal position is higher than the positioning plate 2 , the two side walls 411 are connected along the length direction L of the bottom plate 1 and two first through holes 4121 are provided. The lower ends of the two guide rods 42 are fixedly connected to the bottom plate 1 , and the upper ends are respectively fixed in the corresponding first through holes 4121 . The two guide bearings 43 are sleeved on the corresponding guide rods 42 respectively, and can slide up and down along the corresponding guide rods 42 . The two lug springs 44 are sleeved on the corresponding guide rods 42 respectively, and are located between the bottom plate 1 and the corresponding guide bearings 43 . The receiving block 45 has: two tab grooves 451, located on the upper surface of the receiving block 45, for respectively receiving the two tabs of the electric core B; and two second through holes 452, respectively receiving and fixedly connected to the Corresponding guide bearing 43. The roller mounting frame 46 is fixedly connected to the lower surface of the receiving block 45 opposite to the upper surface on which the two lug grooves 451 are disposed, and is located below the receiving block 45 . The tab is pivotally connected to the bottom of the roller mounting frame 46 with a roller 47 . The tab roller 47 can be pivotally connected to the bottom of the roller mounting frame 46 by means of hinge or bearing connection.

Referring to FIG. 3 , in an embodiment of the detection device for battery exterior dimensions according to the present invention, two side walls 411 of the fixing frame 41 are in contact with the positioning plate 2 .

In the detection device for battery appearance size according to the utility model, referring to FIG. 1 , in one embodiment, the positioning plate 2 has: a notch 25, which is arranged on the rear side of the positioning plate 2 in the width direction W, for accommodating The block 45 enters and exits in the vertical direction H. As shown in FIG.

In the cell exterior size detection device according to the utility model, with reference to Fig. 2, in one embodiment, the positioning plate 2 has: a left opening 21, which is arranged on the left side of the length direction L of the positioning plate 2; and a right opening The hole 22 is provided on the right side in the longitudinal direction L of the positioning plate 2 . Correspondingly, the guide rail mechanism 3 includes: two left guide rails 31, fixedly arranged on the left side of the length direction L of the bottom plate 1, and extending along the length direction L of the bottom plate 1; two left sliders 32, respectively arranged on the corresponding left on the guide rail 31 and can slide on it; two right guide rails 33 are fixedly arranged on the right side of the length direction L of the base plate 1, and extend along the length direction L of the base plate 1; and two right sliders 34 are respectively arranged on On the corresponding right guide rail 33 and can slide on it. Correspondingly, the cell positioning mechanism 5 includes a left clamping block 51 , a left guiding block 52 , a left guiding roller 53 , a right clamping block 57 , a right guiding block 58 , and a right guiding roller 59 . The left clamping block 51 has: a left body part 511, which is arranged on the left side of the longitudinal direction L of the positioning plate 2; opening 21, and can move horizontally along the length direction L in the left opening 21. The left guide block 52 has: a bottom 521 fixed to the two left sliders 32; a left side wall 522 extending upward from the right side of the left bottom 521 in the length direction L and fixedly connected to the left protrusion 512 of the left clamping block 51; The two left convex plates 523 extend from the right side of the left sidewall 522 in the length direction L to the right and are respectively arranged on both sides of the left sidewall 522 in the up-down direction H. The left guiding roller 53 is pivotally connected (for example, using pin shafts) between the two left convex plates 523 . The right clamping block 57 has: a right body part 571, which is arranged on the right side of the length direction L of the positioning plate 2; opening 22, and can move horizontally along the length direction L in the right opening 22. The right guide block 58 has: a right bottom 581 fixed to the two right sliders 34; a right side wall 582 extending upward from the left side of the right bottom 581 in the length direction L and fixedly connected to the right convex portion 572 of the right clamping block 57 Two right convex plates 583 extend from the left side of the right side wall 582 in the length direction L to the left and are respectively arranged on both sides of the right side wall 582 in the up and down direction H. The right guiding roller 59 is pivotally connected (for example, using pin shafts) between the two right convex plates 583 .

Referring to FIG. 2 , in the detection device for battery exterior size according to the present invention, in one embodiment, the left bottom 521 of the left guide block 52 is provided with a plurality of left concave holes 5211 on the left side in the length direction L. The right bottom 581 of the right guide block 58 is provided with a plurality of right concave holes 5811 on the right side in the length direction L. As shown in FIG. Correspondingly, the cell positioning mechanism 5 may further include: a left fixing block 54, which is fixedly connected to the left side of the bottom plate 1 in the length direction L, and is provided with a plurality of left through holes 541; a plurality of left guide rods 55, one end of which is fixedly connected to the The corresponding left concave hole 5211 of the left bottom 521 of the left guide block 52, and the other end is opposite to the corresponding left through hole 541 of the left fixed block 54; a plurality of left guide springs 56, one end is fixedly connected to the left fixed block 54 and sleeved Set on the corresponding left guide rod 55; the right fixed block 5A is fixedly connected to the right side of the length direction L of the bottom plate 1, and is provided with a plurality of right through holes 5A1; a plurality of right guide rods 5B are fixedly connected to the right guide block at one end The corresponding right concave hole 5811 of the right bottom 581 of 58, and the other end is opposite to the corresponding right through hole 5A1 of the right fixed block 5A; a plurality of right guide springs 5C, one end is fixedly connected to the right fixed block 5A and sleeved in the corresponding right guide rod 5B. In the detection device for battery appearance size according to the utility model, referring to Fig. 2, in one embodiment, the control mechanism 6 is arranged on the bottom plate 1, and is respectively connected with the tab receiving mechanism 4 and the battery positioning mechanism 5, and uses In order to control the movement of the tab receiving mechanism 4 and the cell positioning mechanism 5 , further control the storage and release of the tab receiving mechanism 4 for the tab and the fixing and releasing of the cell B by the cell positioning mechanism 5 .

In the detection device for battery exterior dimensions according to the utility model, referring to FIG. 2 , in one embodiment, the guide rail mechanism 3 further includes: two middle guide rails 35 fixedly arranged in the middle of the bottom plate 1; and two middle sliders 36, are respectively arranged on the corresponding middle guide rails 35 and can slide thereon. Correspondingly, the control mechanism 6 includes a bracket 61, a cam 62, a handle 63, two connecting rods 64, a plane cam 65, a linkage plate 66, a guide plate 67, a tail plate 68, a front fixed block 69, a front guide rod 6A and a front guide Spring 6B. The bracket 61 has: a bracket bottom wall 611 fixedly connected to the rear side of the bottom plate 1 in the width direction W; and a bracket outer wall 612 closed with the bracket bottom wall 611 to form a hollow portion. The cam 62 is accommodated in the hollow portion of the bracket 61 and one end is pivotally connected (such as a hinge or a bearing) to the outer wall 612 of the bracket. The handle 63 is fixedly connected to the cam 62 . The two connecting rods 64 are respectively pivotally connected (for example, by using hinges or bearings) to both sides of the other end of the cam 62 in the length direction L. As shown in FIG. Both sides of the longitudinal direction L of the rear end of the plane cam 65 are pivotally connected with two connecting rods 64 (such as hinges or bearings), and the lower side of the plane cam 65 has a contact curved surface 651 that is always in contact with the tab roller 47 . The linkage plate 66 is arranged above the base plate 1 and has: a body portion 661, which is arranged below the contact surface 651 of the plane cam 65 and is fixedly connected with the rear end of the plane cam 65; The front end in the width direction W extends upward. The bottom of the guide plate 67 is fixedly connected to the two middle sliders 36, the rear end of the guide plate 67 in the width direction W is fixedly connected to the connecting portion 662 of the linkage plate 66, and the left guide roller 53 and the right guide roller 59 Pass through the guide plate 67 and can roll along the guide plate 67 , the guide plate 67 has a front concave hole 673 . The front concave hole 673 is disposed at the center of the guide plate 67 in the length direction L and extends from the front end of the guide plate 67 in the width direction W to the middle of the guide plate 67 along the width direction W. The tail plate 68 is fixedly connected to the front end in the width direction W of the guide plate 67 and closed by the guide plate 67 from the front end in the width direction W. The tail plate 68 is provided with a third through hole 681 in the middle of the length direction L. The front fixing block 69 is fixedly connected to the front side of the bottom plate 1 in the width direction L. As shown in FIG. One end of the front guide rod 6A is fixedly connected to the front fixing block 69 , and the other end passes through the third through hole 681 of the tail plate 68 and is accommodated in the front concave hole 673 of the guide plate 67 . The front guide spring 6B is sleeved on the corresponding front guide rod 6A.

In the cell exterior size detection device according to the present invention, referring to FIG. 4 , in one embodiment, the contact curved surface 651 has: a first plane 6511 disposed on the front side of the contact curved surface 651 in the width direction W; a convex surface 6512, and the second plane 6513 is arranged at the rear side of the contact curved surface 651 in the width direction W.

Referring to FIG. 6 , in the battery exterior size detection device according to the present invention, in one embodiment, the guide plate 67 also has a left opening 671 and a right opening 672 . The left opening 671 is arranged on the left side of the longitudinal direction L of the guide plate 67 and penetrates in the vertical direction H of the guide plate 67. The left guide roller 53 passes through the left opening 671 and can roll in it. The left opening 671 has : left linear opening 6711, extending from the front end of the width direction W of the guide plate 67 to the middle part of the guide plate 67 along the width direction W; The rear end in the width direction W and the left end in the length direction L of 67 extend obliquely. The right opening 672 is arranged on the right side of the length direction L of the guide plate 67 and penetrates in the vertical direction H of the guide plate 67. The right guide roller 59 passes through the right opening 672 and can roll in it. The right opening 672 has : a right linear opening 6721 extending from the front end of the guide plate 67 in the width direction W to the middle part of the guide plate 67 along the width direction W; and a right bent opening 6722 extending from the rear end of the right linear opening 6721 in the width direction W to the guide plate The rear end in the width direction W and the right end in the length direction L of 67 extend obliquely.

In the detection device for the appearance size of the battery cell according to the present invention, referring to FIGS. 64 drives the plane cam 65 and the linkage plate 66 to move to the front side of the length direction; in the first stage, the tab roller 47 rolls along the convex surface 6512 from the end of the first plane 6511, and the tab roller 47 is pressed down and Drive the storage block 45 to move downward relative to the positioning plate 2 and the storage block 45 slides downward along the guide rod 42, so that the storage block 45 avoids the position of the tab of the battery B that will be placed on the positioning plate 2, preventing the storage block from 45 to bend the tabs of the cell B placed on the positioning plate 2, and during this process, the left guide roller 53 and the right guide roller 59 roll in the left linear opening 6711 and the right linear opening 6721 respectively, Therefore, the left clamping block 51 and the right clamping block 57 remain stationary; with the rotation of the handle 63, the second stage is entered, and the tab roller 47 rolls from the end of the convex surface 6512 to the second plane 6513, and the receiving block 45 remains stationary. And the left guide roller 53 and the right guide roller 59 roll from the left linear opening 6711 and the right linear opening 6721 to the left bending opening 6712 and the right bending opening 6722 respectively, driving the left clamping block 51 and the right clamping block 57 Move to the left and right sides of the length direction of the positioning plate 2 respectively, so that the distance between the left clamping block 51 and the right clamping block 57 in the length direction is increased, so as to allow the electric core B to be placed on the positioning plate 2 In the third stage, put the cell B into the space surrounded by the left clamping block 51, the right clamping block 57, and the positioning plate 2; loosen the handle 63, and enter the fourth stage. Under the action of elastic force, the guide plate 67 is pushed to move along the rear side of the length direction, and the left guide spring 56 and the right guide spring 5C push the left guide roller 53 and the right guide roller 59 to bend from the left bending opening 6712 and the right bending opening 6712 respectively. The opening 6722 rolls to the left linear opening 6711 and the right linear opening 6721, so that the distance in the length direction between the left clamping block 51 and the right clamping block 57 is shortened. When the right side is clamped against the battery core B, the length and width specifications of the battery core B are detected, and during this process, the tab roller 47 rolls on the second plane 6513, and the receiving block 45 remains motionless; The plate 67 continues to move to the rear side in the length direction and enters the fifth stage. The tab roller 47 rolls from the second plane 6513 to the convex surface 6512, and the receiving block 45 moves upward under the elastic force of the tab spring 44, so that The receiving block 45 moves in the notch 25 of the positioning plate 2 and the two tab grooves 451 of the receiving block 45 move upward to the position of the tabs, and the two tabs are respectively accommodated in the two tab grooves 451 , to detect the length and width specifications of the tabs, and in this process, the left guide roller 53 and the right guide roller 59 roll in the left linear opening 6711 and the right linear opening 6721 respectively, and the left clamping block 51 and the right clamping block 57 keep still; detect the length and width specifications of the tabs After that, turn the handle 63 clockwise again to repeat the aforementioned operation of making the receiving block 45 move down along the guide bar 42 and increasing the distance between the left clamping block 51 and the right clamping block 57 in the length direction, thereby loosening After the battery cell B is tested, the battery cell B is taken out, and then the next cycle operation is performed to perform the above operation on another battery cell B to be tested.

In the detection device for battery exterior dimensions according to the utility model, referring to FIG. 2 , in one embodiment, the base plate 1 has: a front groove 11, which is arranged on the front side of the base plate 1 in the width direction W, and the front fixing block 69 is fixed Connected to the front groove 11 of the base plate 1 , so that the front fixing block 69 is fixedly connected to the front side of the base plate 1 in the width direction W.

In the detection device for battery appearance size according to the utility model, referring to Fig. 2, in one embodiment, the bottom plate 1 has: a rear groove 12, which is arranged on the rear side of the width direction W of the bottom plate 1, and the bracket bottom wall 611 is fixed Connected in the rear groove 12 , so that the bracket bottom wall 611 is fixedly connected to the rear side of the bottom plate 1 in the width direction W.

In the detection device for battery appearance size according to the utility model, referring to FIG. 2 , in one embodiment, the guide rail mechanism 3 further includes: two guide rail spacers 37, fixedly arranged in the middle of the bottom plate 1, and along the bottom of the bottom plate 1. The width direction W extends. Wherein, the two middle guide rails 35 are respectively fixedly arranged on the two guide rail spacers 37 , so that the two middle guide rails 35 are fixed at the middle of the bottom plate 1 .

In the detection device for battery appearance size according to the utility model, referring to Fig. 1, in one embodiment, the positioning plate 2 has: a front boss 23, which is arranged on the front side of the width direction W of the positioning plate 2; and two The rear bosses 24 are arranged on the rear side of the positioning plate 2 in the width direction W, and the notch 25 is located between the two rear bosses 24 . The cell B to be tested will be put into the space surrounded by the left clamping block 51 , the right clamping block 52 , the front boss 24 of the positioning plate 2 and the two rear bosses 25 .

In the detection device for battery appearance size according to the utility model, referring to Fig. 1, Fig. 2 and Fig. 5, in one embodiment, there are two front bosses 23, which are arranged on the front side of the positioning plate 2 in the width direction W And are respectively aligned with the two rear bosses 24 in the width direction W.

In the battery exterior size detection device according to the utility model, referring to Fig. 1 and Fig. 2, in one embodiment, the battery exterior size detection device further includes: a centering adjustment block 7, which is arranged on and screwed to On the left body portion 511 of the left clamping block 51 and/or the right body portion 571 of the right clamping block 57 to adjust the distance between the left clamping block 51 and the right clamping block 57 in the length direction L of the positioning plate 2 .

In the battery appearance size detection device according to the utility model, with reference to Fig. 1 and Fig. 2, in one embodiment, there are a plurality of waist holes 71 on the upper surface of the centering adjustment block 7, and the screws pass through the corresponding waist holes 71 to The centering adjustment block 7 is connected to the left body portion 511 of the left clamping block 51 and/or the right body portion 571 of the right clamping block 57 .

In the detection device for battery appearance size according to the utility model, referring to Fig. 1 and Fig. 2, in one embodiment, the side of the centering adjustment block 7 has a plurality of threaded holes 72, and a plurality of headless screws pass through corresponding threads The hole 72 abuts against the left body part 511 of the left clamping block 51 and/or the right body part 571 of the right clamping block 57, and the position of the centering adjustment block 7 in the length direction L of the positioning plate 2 can be adjusted by a headless screw.

Referring to FIGS. 1 to 4 , in the battery appearance size detection device according to the present invention, in one embodiment, the battery appearance size detection device further includes a support rod 8 , which is fixedly connected to the base plate 1 and the positioning plate 2 .

Claims (10)

1. A battery appearance size detection device, characterized in that, comprising: Base plate (1), fixed; The positioning plate (2), used for placing the battery cell (B), is fixedly arranged above the bottom plate (1); The rail mechanism (3) is arranged on the bottom plate (1); The tab receiving mechanism (4) is arranged on the rear side of the positioning plate (2) in the width direction (W) so as to be able to move up and down along the vertical direction (H), and is used to accommodate the tab of the battery cell (B) for detecting the tab The length and width specifications; and The cell positioning mechanism (5) is installed on the positioning plate (2) and connected with the guide rail mechanism (3), and can move on the positioning plate (2) along the guide rail mechanism (3), and is used to fix the cell (B) and The appearance size of the battery cell (B) is detected, and the battery cell positioning mechanism (5) performs positioning based on the center of the battery cell (B). 2. The battery appearance size detection device according to claim 1, characterized in that the tab receiving mechanism (4) comprises: The fixing frame (41), which is arranged on the rear side of the positioning plate (2) in the width direction (W), has: two side walls (411), respectively fixedly connected to both sides of the bottom plate (1) in the length direction (L); and The top wall (412), whose horizontal position is higher than the positioning plate (2), connects the two side walls (411) along the length direction (L) of the bottom plate (1) and is provided with two first through holes (4121); Two guide rods (42), the lower ends of which are fixedly connected to the bottom plate (1), and the upper ends are respectively fixed in the corresponding first through holes (4121); The two guide bearings (43) are sleeved on the corresponding guide rods (42) respectively, and can slide up and down along the corresponding guide rods (42); The two tab springs (44) are respectively sleeved on the corresponding guide rods (42), and are located between the bottom plate (1) and the corresponding guide bearings (43); Containment block (45), with: Two lug grooves (451), located on the upper surface of the housing block (45), are used to respectively accommodate the two lugs of the battery core (B); and The two second through holes (452) are respectively accommodated and fixedly connected to the corresponding guide bearings (43); The roller mounting bracket (46) is fixedly connected to the lower surface of the accommodation block (45) opposite to the upper surface where the two lug grooves (451) are arranged and is positioned below the accommodation block (45); The pole ear roller (47) is pivotally connected to the bottom of the roller mounting frame (46). 3. The battery appearance dimension detection device according to claim 2, characterized in that, Positioning plate (2) has: The notch (25) is arranged on the rear side of the positioning plate (2) in the width direction (W), and is used for allowing the receiving block (45) to come in and out in the up and down direction (H). 4. The battery appearance dimension detection device according to claim 2, characterized in that, Positioning plate (2) has: The left opening (21) is arranged on the left side of the length direction (L) of the positioning plate (2); and The right opening (22) is arranged on the right side of the length direction (L) of the positioning plate (2); Rail mechanism (3) comprises: Two left guide rails (31), fixedly arranged on the left side of the length direction (L) of the base plate (1), and extending along the width direction (W) of the base plate (1); Two left sliders (32) are respectively arranged on the corresponding left guide rails (31) and can slide thereon; Two right guide rails (33), fixedly arranged on the right side of the length direction (L) of the base plate (1), and extending along the width direction (W) of the base plate (1); and Two right sliders (34) are respectively arranged on the corresponding right guide rails (33) and can slide thereon; The cell positioning mechanism (5) includes: The left clamping block (51) has: The left body portion (511) is arranged on the left side of the positioning plate (2) in the length direction (L); and The left convex part (512) extends downward from the left body part (511) and passes through the left opening (21) and is exposed in the left opening (21), and can be inserted along the lengthwise direction in the left opening (21). (L) Horizontal movement; Left guide block (52), has: Left bottom (521), is fixed on two left sliders (32); The left side wall (522) extends upward from the right side of the left bottom (521) in the length direction (L) and is fixedly connected with the left convex part (512) of the left clamping block (51); Two left convex plates (523), extending from the right side of the left side wall (522) in the length direction (L) to the right and respectively arranged on both sides of the left side wall (522) in the up and down direction (H); The left guiding roller (53) is pivotally connected between the two left convex plates (523); Right clamping block (57), having: The right body portion (571) is arranged on the right side of the positioning plate (2) in the length direction (L); and The right convex part (572) extends downward from the right body part (571) and passes through the right opening (22) and is exposed in the right opening (22), and can be inserted along the lengthwise direction in the right opening (22). (L) Horizontal movement; Right guide piece (58), has: Right bottom (581), is fixed on two right sliders (34); The right side wall (582) extends upward from the left side in the length direction (L) of the right bottom (581) and is fixedly connected with the right convex part (572) of the right clamping block (57); Two right convex plates (583), extending from the left side of the length direction (L) of the right side wall (582) to the left and respectively arranged on the two sides of the up and down direction (H) of the right side wall (582); With a roller (59), pivotally connected between the two right ledges (583). 5. The battery appearance size detection device according to claim 4, characterized in that, the battery appearance size detection device further comprises: a control mechanism (6), which is arranged on the bottom plate (1) and accommodated with the tabs respectively The mechanism (4) is connected with the cell positioning mechanism (5), and is used to control the movement of the tab storage mechanism (4) and the cell positioning mechanism (5), and then control the storage and contact of the tab storage mechanism (4) with respect to the tab. Release and the fixing and loosening of the cell (B) by the cell positioning mechanism (5). 6. The battery appearance dimension detection device according to claim 5, characterized in that, Rail mechanism (3) also includes: Two middle guide rails (35), fixedly arranged in the middle of the bottom plate (1); and Two middle slide blocks (36) are respectively arranged on the corresponding middle guide rails (35) and can slide thereon; The control mechanism (6) includes: A bracket (61) having: The bracket bottom wall (611) is fixedly connected to the rear side of the bottom plate (1) in the width direction (W); and The bracket outer wall (612) is closed with the bracket bottom wall (611) to form a hollow portion; The cam (62) is accommodated in the hollow part of the bracket (61) and one end is pivotally connected to the outer wall of the bracket (612); Handle (63), is fixedly connected on the cam (62); Two connecting rods (64), pivotally connected to both sides of the other end of the cam (62) in the length direction (L) respectively; The plane cam (65), the two sides of the length direction (L) of its rear end are pivotally connected with the two connecting rods (64), and the lower side of the plane cam (65) is always in contact with the lug roller (47). The contact surface of (651); The linkage plate (66), arranged above the bottom plate (1), has: The body part (661) is arranged below the contact curved surface (651) of the plane cam (65) and fixedly connected with the rear end of the plane cam (65); and The connecting portion (662) extends upward from the front end in the width direction (W) of the body portion (661) of the linkage plate (66); The guide plate (67), the bottom is fixedly connected to two middle slide blocks (36), and the rear end of its width direction (W) is fixedly connected to the connecting portion (662) of the linkage plate (66), and the left guiding roller ( 53) and the right guiding roller (59) pass through the guide plate (67) and can roll along the guide plate (67); have: The front concave hole (673) is arranged in the center of the length direction (L) of the guide plate (67) and extends from the front end of the guide plate (67) in the width direction (W) to the guide plate (67) along the width direction (W). the middle of Tail plate (68), fixedly connected to the front end of the width direction (W) of guide plate (67) so that guide plate (67) is closed from the front end of width direction (W), tail plate (68) is in the length direction (L) The middle part is provided with a third through hole (681); The front fixing block (69) is fixedly connected to the front side of the base plate (1) in the width direction (W); The front guide rod (6A), one end is fixedly connected to the front fixed block (69), the other end passes through the third through hole (681) of the tail plate (68) and is accommodated in the front concave hole (673) of the guide plate (67) Inside; The front guide spring (6B) is sleeved on the corresponding front guide rod (6A). 7. The battery appearance dimension detection device according to claim 6, characterized in that, the contact curved surface (651) has: The first plane (6511) is arranged on the front side of the contact curved surface (651) in the width direction (W); a convex surface (6512), arranged in the middle of the width direction (W) of the contact curved surface (651); and The second plane (6513) is arranged on the rear side of the contact curved surface (651) in the width direction (W). 8. The battery appearance size detection device according to claim 6, characterized in that the guide plate (67) also has: The left opening (671) is arranged on the left side of the longitudinal direction (L) of the guide plate (67) and penetrates on the up-down direction (H) of the guide plate (67). The left guide roller (53) passes through the left opening ( 671) passes through and can be rolled within, the left opening (671) has: The left linear opening (6711) extends from the front end of the guide plate (67) in the width direction (W) to the middle of the guide plate (67) along the width direction (W); and The left bent opening (6712) extends obliquely from the rear end of the left linear opening (6711) in the width direction (W) to the rear end of the guide plate (67) in the width direction (W) and the left end in the length direction (L); as well as The right opening (672) is arranged on the right side of the longitudinal direction (L) of the guide plate (67) and penetrates on the up-down direction (H) of the guide plate (67). The right guide roller (59) passes through the right opening ( 672) passes through and can be rolled within, the right opening (672) has: Right linear opening (6721), extends from the front end of the width direction (W) of the guide plate (67) to the middle part of the guide plate (67) along the width direction (W); and The right bent opening (6722) extends obliquely from the rear end of the right linear opening (6721) in the width direction (W) to the rear end of the guide plate (67) in the width direction (W) and the right end in the length direction (L). 9. The battery appearance dimension detection device according to claim 4, characterized in that, Positioning plate (2) has: The front boss (23) is arranged on the front side of the positioning plate (2) in the width direction (W); and Two rear bosses (24) are arranged on the rear side of the positioning plate (2) in the width direction (W), and the notch (25) is located between the two rear bosses (24); Among them, the electric core (B) to be tested will be put into the left clamping block (51), the right clamping block (52), the front boss (24) of the positioning plate (2) and the two rear bosses (25). within the space. 10. The battery appearance size detection device according to claim 4, characterized in that, the battery appearance size detection device further comprises: The centering adjustment block (7) is arranged and screwed on the left main body portion (511) of the left clamping block (51) and/or on the right main body portion (571) of the right clamping block (57), to adjust the left clamping block (51) and the spacing of the right clamping block (57) on the length direction (L) of the positioning plate (2).