Press fitting detection equipment for battery shell and top cover

Abstract

The utility model belongs to the technical field of battery production, and particularly relates to press-fitting detection equipment for a battery shell and a top cover, which comprises a press-fitting platform; the press-fitting mechanism is mounted on the press-fitting platform and used for press-fitting the to-be-tested shell and the to-be-tested top cover; the fixed base is arranged on the press-fitting platform and is used for placing a shell to be tested; the simulation battery cell is placed in the shell to be tested in the fixed base and is used for simulating the natural rebound state of the battery cell in the shell when the top cover is pressed on the shell; the contour detection device is arranged on one side of the press-fitting platform and is used for detecting and calculating the flatness of the shell to be tested and the top cover after press-fitting; the press fitting detection equipment for the battery shell and the top cover has the beneficial effects that the adaptive tightness of press fitting of the top cover and the shell can be effectively verified by using the press fitting detection equipment for the battery shell and the top cover, so that potential safety hazards caused by the adaptive problem of the top cover and the shell are prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and in particular relates to a press-fit detection device for a battery shell and a top cover. Background Art

[0002] At present, the top cover and shell of most square batteries mostly adopt a split structure. The top cover and the shell are produced separately, and then the top cover is pressed into the open end of the shell to complete the assembly between the top cover and the shell. The press-fitting of the shell and the top cover usually utilizes an interference fit between the top cover and the open end of the shell to achieve the combination between the top cover and the shell.

[0003] In the prior art, since the matching standard between the top cover and the shell is too vague, the assembly between the top cover and the shell often produces abnormalities due to poor matching. For example, when the top cover and the shell are not sufficiently interfered, the top cover and the shell will be loose, and the contact friction between the shell opening and the top cover will be insufficient. Under the influence of the natural rebound force inside the battery cell or the vibration during the circulation process, it is easy to loosen, causing the top cover and the shell to separate, affecting the welding effect during the peripheral welding in the subsequent process, and in severe cases causing the battery cell to be scrapped or the safety hazard of laser light leakage inside the battery cell.

[0004] When the interference fit between the top cover and the shell is too large, the joint contour may be abnormal after the top cover and shell are pressed together, resulting in deformation of the shell or the top cover. In severe cases, the battery cell may be scrapped or other safety hazards may occur. Utility Model Content

[0005] The purpose of the utility model is to provide a battery housing and top cover press-fit detection device to solve the above-mentioned technical problems, so as to achieve the effect of detecting the compatibility between the top cover and the housing.

[0006] In view of this, the utility model provides a battery housing and top cover press-fit detection device, comprising:

[0007] Pressing platform;

[0008] A press-fitting mechanism, which is installed on the press-fitting platform and is used to press-fit the shell and top cover to be tested;

[0009] A fixed base, which is installed on the press-fitting platform and is used to place the shell and top cover to be tested;

[0010] A simulated battery cell is placed in a shell to be tested in a fixed base, and is used to simulate the natural rebound state of the battery cell in the shell when the top cover is pressed onto the shell;

[0011] The contour detection device is arranged on one side of the press-fitting platform and is used to detect and calculate the flatness of the shell and top cover to be tested after press-fitting.

[0012] Further, the press-fitting mechanism comprises:

[0013] A bracket, the bracket is installed on the press-fitting platform;

[0014] A driving member, wherein the driving member is mounted on the bracket;

[0015] A pressure plate, which is mounted on the driving end of the driving member;

[0016] The driving member controls the pressing plate to move along the Z direction, so as to press the top cover and the shell to be tested together.

[0017] Furthermore, the press-fitting mechanism further comprises:

[0018] Limiter, the limiter is installed on the pressure plate;

[0019] Wherein, a limiting portion for abutting against the limiter is provided on the fixed base.

[0020] Furthermore, the press-fitting mechanism further comprises:

[0021] Pressure detector: The pressure detector is used to display the size of the pressing pressure applied by the pressing plate.

[0022] Furthermore, the pressure detector is a pressure gauge.

[0023] Furthermore, the simulated battery cell includes:

[0024] A simulation block, the simulation block is installed in the housing to be tested in the fixed base;

[0025] A lifting plate, which is installed on the top of the simulation block along the Z direction;

[0026] An elastic member is installed between the simulation block and the lifting plate.

[0027] Furthermore, the elastic member is a spring.

[0028] Furthermore, the fixed base is detachably mounted on the press-fitting platform.

[0029] Furthermore, the press-fitting platform also includes:

[0030] A card slot, which is arranged on the press-fitting platform;

[0031] The fixed base also includes:

[0032] A card block, which is arranged at the bottom of the fixed base;

[0033] The card block is adapted to be connected with the card slot.

[0034] Further, the contour detection device comprises:

[0035] A control mechanism, which is installed on one side of the press-fitting platform;

[0036] A detector, which is mounted on the driving end of the control mechanism;

[0037] The control mechanism is used to drive the detector to move along the X direction, the Y direction and the Z direction.

[0038] The beneficial effects of the utility model are:

[0039] By using the press-fit detection device for the battery shell and the top cover, the tightness of the press-fitting of the top cover and the shell can be effectively verified, thereby preventing safety hazards caused by the fit problems between the top cover and the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0041] Figure 2 It is a structural schematic diagram of the utility model from another perspective;

[0042] Figure 3 It is a structural schematic diagram of the press-fitting platform and the press-fitting mechanism in the utility model;

[0043] Figure 4 It is a schematic diagram of the installation structure of the fixed base and the simulated battery cell in the utility model;

[0044] Figure 5 It is a schematic diagram of the structure of the simulated battery cell in the utility model;

[0045] The symbols in the figure are:

[0046] 1. Press-fitting platform; 101. Card slot; 2. Shell; 3. Top cover; 4. Fixed base; 401. Limiting part; 402. Card block; 5. Simulated battery cell; 501. Simulation block; 502. Lifting plate; 503. Elastic part; 6. Bracket; 7. Pressing plate; 8. Stopper; 9. Pressure detector; 10. Control mechanism; 11. Detector. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0049] Embodiment 1:

[0050] This embodiment provides a battery housing and top cover press-fit detection device, including:

[0051] Pressing platform 1;

[0052] A press-fitting mechanism, which is installed on the press-fitting platform 1 and is used to press-fit the housing 2 and the top cover 3 to be tested;

[0053] A fixed base 4, which is installed on the press-fitting platform 1 and is used to place the shell 2 and the top cover 3 to be tested;

[0054] A simulated battery cell 5 is placed in the housing 2 to be tested in the fixed base 4, and is used to simulate the natural rebound state of the battery cell in the housing 2 when the top cover 3 is pressed onto the housing 2;

[0055] The contour detection device is arranged on one side of the press-fitting platform 1 and is used to detect and calculate the flatness of the shell 2 and the top cover 3 to be tested after press-fitting.

[0056] In this technical solution, the use steps of the press-fit detection device are as follows: Figure 1 As shown, first install the fixed base 4 on the press-fitting platform 1, then place the shell 2 to be tested into the fixed base 4, then place the simulated battery cell 5 whose size matches the shell 2 into the shell 2, and finally place the top cover 3 to be tested into the opening of the fixed base 4 to complete the preparation work. It is worth mentioning that there is an inclined chamfer at the opening of the fixed base 4, and the top cover 3 can match the shell 2 along the chamfer to facilitate press-fitting between the top cover 3 and the shell 2.

[0057] After the preparation work is completed, the press-fitting work begins. The press-fitting mechanism is started by the start button. The output end of the press-fitting mechanism contacts the top cover 3 and applies downward pressure to the top cover 3 to press the top cover 3 to the opening of the shell 2. When the downward pressure height of the output end of the press-fitting mechanism reaches the set distance, the press-fitting mechanism will stop moving down and record the maximum value of the press-fitting pressure. The press-fitting pressure is given according to different models of products. The press-fitting pressure is a range. Too small and too large are judged as NG. After the top cover 3 and the shell 2 are press-fitted, the output end of the press-fitting mechanism returns to the initial position to make room for operation. Since the top cover 3 is pressed onto the shell 2, the simulated battery cell 5 in the shell 2 will be squeezed by the top cover 3, thereby generating a certain elastic force. If the elastic force pushes the top cover 3 out of the shell 2 to separate the top cover 3 from the shell 2, it is considered that the adaptation is NG, that is, the interference fit between the top cover 3 and the shell 2 is insufficient.

[0058] After the press-fitting work is completed, the contour detection device starts to work, calculates the height difference of the joint between the top cover 3 and the shell 2, and then compares the difference with the specification value, which will be set according to different product sizes. If the difference is less than the specification value, it is considered qualified. If the difference is greater than the specification value, it means that the interference fit of the top cover 3 and the shell 2 is too large.

[0059] In summary, by using the battery shell and top cover press-fit detection equipment, the tightness of the press-fit of the top cover 3 and the shell 2 can be effectively verified, thereby preventing safety hazards caused by the fit problems of the top cover 3 and the shell 2.

[0060] Embodiment 2:

[0061] This embodiment provides a battery housing and top cover press-fit detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0062] Further, the press-fitting mechanism comprises:

[0063] A bracket 6, the bracket 6 is installed on the press-fitting platform 1;

[0064] A driving member, the driving member is mounted on the bracket 6;

[0065] A pressing plate 7, the pressing plate 7 is mounted on the driving end of the driving member;

[0066] The driving member controls the pressing plate 7 to move along the Z direction, so as to press the top cover 3 and the housing 2 to be tested together.

[0067] In the present technical solution, the driving member can be a hydraulic cylinder or a pneumatic cylinder, which is installed on the bracket 6 and is located directly above the fixed base 4. The pressure plate 7 is installed on the output end of the driving member. The driving member controls the pressure plate 7 to move downward along the Z direction to abut against the top cover 3, and then the pressure plate 7 pushes the top cover 3 down onto the shell 2, thereby realizing the press-fitting of the top cover 3 and the shell 2.

[0068] Embodiment 3:

[0069] This embodiment provides a battery housing and top cover press-fit detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0070] Furthermore, the press-fitting mechanism further comprises:

[0071] A limiter 8, the limiter 8 is installed on the pressure plate 7;

[0072] The fixed base 4 is provided with a limiting portion 401 for abutting against the limiter 8 .

[0073] In the present technical solution, the pressing height of the pressing plate 7 is controlled by a limiter 8, and the limiter 8 adopts a trigger signal feedback. The limiter 8 is installed under the pressing plate 7. In the process of the driving component controlling the pressing plate 7 to move downward along Z, when the limiter 8 contacts the limiting part 401 on the fixed base 4, a signal will be sent to the pressing mechanism, and the driving component will control the pressing plate 7 to stop pressing down, thereby realizing the limitation of the pressing height of the pressing plate 7.

[0074] Embodiment 4:

[0075] This embodiment provides a battery housing and top cover press-fit detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0076] Furthermore, the press-fitting mechanism further comprises:

[0077] The pressure detector 9 is used to display the size of the press pressure applied by the pressing plate 7.

[0078] Furthermore, the pressure detector 9 is a pressure gauge.

[0079] In the present technical solution, a pressure detector 9 is installed on the pressing mechanism. The pressure detector 9 can be a pressure gauge. When the driving member controls the pressing plate 7 to press down, the pressure gauge can display the maximum pressure in the recording process. When the pressing plate 7 stops pressing down due to the contact between the limiter 8 and the limit part 401 of the fixed base 4, the maximum pressure displayed by the pressure gauge is compared with the range value of the pressing pressure. If the maximum pressure of the pressure gauge is less than or greater than the range value of the pressing pressure, it is judged as NG.

[0080] Embodiment 5:

[0081] This embodiment provides a battery housing and top cover press-fit detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0082] Furthermore, the simulated battery cell 5 includes:

[0083] A simulation block 501, the simulation block 501 is installed in the housing 2 to be tested in the fixed base 4;

[0084] A lifting plate 502, the lifting plate 502 is installed on the top of the simulation block 501 along the Z direction;

[0085] The elastic member 503 is installed between the simulation block 501 and the lifting plate 502 .

[0086] In the present technical solution, the elastic member 503 can be a spring, and the number of springs can be multiple. One end of the spring is fixedly connected to the bottom of the lifting plate 502, and a nut is fixedly connected to the other end of the spring. The nut is then threadedly connected to the screw and the spring is sleeved on the screw. Finally, one end of the screw is installed on the simulation block 501 to complete the assembly of the simulated battery cell 5.

[0087] Through this structural design, the lifting plate 502 has the function of elastically expanding and contracting along the Z direction, so that it can be used to simulate the upward elastic force caused by the bending of the tab of the battery cell in the battery. In addition, by adjusting the threaded connection amount between the nut and the screw, the effective expansion amount of the spring can be changed, thereby realizing the function of simulating the adjustable elastic force of the battery cell 5, which has a wider range of application and higher practicality.

[0088] Embodiment 6:

[0089] This embodiment provides a battery housing and top cover press-fit detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0090] Furthermore, the fixed base 4 is detachably mounted on the press-fitting platform 1 .

[0091] In the present technical solution, the fixed base 4 and the press-fitting platform 1 are detachably connected, which facilitates the production, installation and use of the fixed base 4 and the press-fitting platform 1, and facilitates subsequent maintenance and replacement.

[0092] Furthermore, the press-fitting platform 1 also includes:

[0093] A card slot 101, which is disposed on the press-fitting platform 1;

[0094] The fixed base 4 also includes:

[0095] A clamping block 402, which is disposed at the bottom of the fixed base 4;

[0096] The card block 402 is adapted to be engaged with the card slot 101 .

[0097] In the present technical solution, the number of the card blocks 402 and the card slots 101 can be multiple, and the card blocks 402 and the card slots 101 are snap-fitted one by one, and the snap-fitting between the card blocks 402 and the card slots 101 is utilized to realize the connection between the fixed base 4 and the press-fitting platform 1. The structural design is simple and flexible, which not only facilitates the staff to install the fixed base 4 on the press-fitting platform 1, but also ensures the precise installation of the fixed base 4 on the press-fitting platform 1, and avoids the improper installation position of the fixed base 4 affecting subsequent use, and has high practicality.

[0098] Embodiment 7:

[0099] This embodiment provides a battery housing and top cover press-fit detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0100] Further, the contour detection device comprises:

[0101] A control mechanism 10, which is installed on one side of the press-fitting platform 1;

[0102] A detector 11, the detector 11 is installed on the driving end of the control mechanism 10;

[0103] The control mechanism 10 is used to drive the detector 11 to move along the X direction, the Y direction and the Z direction.

[0104] In the present technical solution, the control mechanism 10 can be a manipulator, which can control the detector 11 to move around the junction of the top cover 3 and the shell 2 for one circle. The detector 11 can be a laser scanner, which calculates the flatness of the irradiated surface by laser reflection. After the detector 11 moves around the junction of the top cover 3 and the shell 2 for one circle, a 3D stereo model is established, so that the height difference at the junction of the top cover 3 and the shell 2 can be calculated.

[0105] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A battery housing and top cover press-fit detection device, characterized in that: include: Pressing platform (1); A press-fitting mechanism, the press-fitting mechanism being mounted on the press-fitting platform (1) and being used for press-fitting the housing (2) and the top cover (3) to be tested; A fixed base (4), the fixed base (4) being mounted on the press-fitting platform (1) and used for placing the housing (2) and the top cover (3) to be tested; A simulated battery cell (5), wherein the simulated battery cell (5) is placed in the housing (2) to be tested in the fixed base (4) and is used to simulate the natural rebound state of the battery cell in the housing (2) when the top cover (3) is pressed onto the housing (2); A contour detection device is provided on one side of a press-fitting platform (1) and is used to detect and calculate the flatness of a shell (2) and a top cover (3) to be tested after press-fitting.

2. The battery housing and top cover press-fit detection device according to claim 1, characterized in that: The press-fitting mechanism comprises: A bracket (6), wherein the bracket (6) is mounted on the press-fitting platform (1); A driving member, the driving member being mounted on the bracket (6); A pressing plate (7), wherein the pressing plate (7) is mounted on the driving end of the driving member; The driving member controls the pressing plate (7) to move along the Z direction, so as to press the top cover (3) and the housing (2) to be tested together.

3. The battery housing and top cover press-fit detection device according to claim 2, characterized in that: The press-fitting mechanism also includes: A stopper (8), wherein the stopper (8) is mounted on the pressure plate (7); Wherein, the fixed base (4) is provided with a limiting portion (401) for abutting against the limiter (8).

4. The battery housing and top cover press-fit detection device according to claim 2, characterized in that: The press-fitting mechanism also includes: A pressure detector (9), wherein the pressure detector (9) is used to display the size of the pressing pressure applied by the pressing plate (7).

5. The battery housing and top cover press-fit detection device according to claim 4, characterized in that: The pressure detector (9) is a pressure gauge.

6. The battery housing and top cover press-fit detection device according to claim 1, characterized in that: The simulated battery cell (5) comprises: A simulation block (501), the simulation block (501) being installed in a housing (2) to be tested in a fixed base (4); A lifting plate (502), wherein the lifting plate (502) is installed on the top of the simulation block (501) along the Z direction; An elastic member (503), wherein the elastic member (503) is installed between the simulation block (501) and the lifting plate (502).

7. The battery housing and top cover press-fit detection device according to claim 6, characterized in that: The elastic member (503) is a spring.

8. The battery housing and top cover press-fit detection device according to claim 1, characterized in that: The fixed base (4) is detachably mounted on the press-fitting platform (1).

9. The battery housing and top cover press-fit detection device according to claim 8, characterized in that: The press-fitting platform (1) further comprises: A card slot (101), wherein the card slot (101) is arranged on the press-fitting platform (1); The fixed base (4) also includes: A card block (402), wherein the card block (402) is arranged at the bottom of the fixed base (4); The card block (402) is adapted to be card-connected with the card slot (101).

10. The battery housing and top cover press-fit detection device according to claim 1, characterized in that: The contour detection device comprises: A control mechanism (10), wherein the control mechanism (10) is installed on one side of the press-fitting platform (1); A detector (11), wherein the detector (11) is mounted on a driving end of the control mechanism (10); The control mechanism (10) is used to drive the detector (11) to move along the X direction, the Y direction and the Z direction.

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