Detection device and battery production equipment

Abstract

The utility model discloses a detection device and battery production equipment, and the detection device is used for detecting whether a target piece is installed in place or not, and comprises a contact piece which is used for being in contact with the target piece; the detection assembly is used for sensing the position change of the contact piece and generating a detection signal; wherein when the target piece in contact with the contact piece is not installed in place, the position of the contact piece is changed under the abutting of the target piece. According to the detection device provided by the invention, the contact piece can be in direct contact with the sealing nail, the sealing nail with the tilting area can enable the contact piece to generate position change, and the detection assembly senses the position change and generates the detection signal, so that the tilting condition of the sealing nail is accurately determined; the detection device adopts contact detection, can identify the fine change of the height of the sealing nail, and also can accurately identify a small warped nail, so that the welding effect of the subsequent sealing nail is ensured.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically to a detection device, and also to a battery production equipment including the detection device. Background Art

[0002] After the lithium battery is filled with liquid, a sealing pin needs to be placed in the filling hole and welded to the battery top cover to seal the filling hole; before welding the sealing pin, the placement effect of the sealing pin needs to be tested to ensure the subsequent welding effect of the sealing pin. Currently, a visual inspection module is usually used to detect whether the sealing pin is lifted up, which has the following disadvantages: it cannot identify subtle changes in height, and small lifted pins are difficult to identify. Utility Model Content

[0003] In view of this, the present application provides a detection device and also provides a battery production equipment including the above detection device.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A detection device, used to detect whether a target part is installed in place, comprising:

[0006] A contact member, used for contacting the target member;

[0007] A detection component, sensing a position change of the contact member and generating a detection signal;

[0008] Wherein, when the target part in contact with the contact part is not installed in place, the contact part changes position under the contact of the target part.

[0009] Optionally, in the above detection device, a stroke amplification component is provided between the contact member and the detection component;

[0010] The stroke amplification component can amplify the displacement of the contact member and output the amplified displacement;

[0011] The detection component detects the amplified displacement and generates the detection signal.

[0012] Optionally, in the above detection device, the stroke amplification component includes:

[0013] A screw rod connected to the contact member and moving under the drive of the contact member;

[0014] A first gear and a second gear are coaxially arranged, the first gear is meshed with the screw rod, and the radius of the second gear is greater than the radius of the first gear, so as to amplify the displacement of the contact member and convert it into a rotation angle.

[0015] Optionally, in the above detection device, the stroke amplification component includes a third gear, the third gear is meshed with the second gear, and the radius of the third gear is smaller than the radius of the second gear, so as to amplify the rotation angle;

[0016] The detection assembly includes a first angular displacement sensor coaxially arranged with the third gear.

[0017] Optionally, in the above detection device, the stroke amplification component includes an elastic reset member, and the elastic reset member drives the screw rod to reset, so that the screw rod drives the contact member to reset.

[0018] Optionally, the above detection device further includes a housing for accommodating the stroke amplification component and the detection component;

[0019] The contact member is an L-shaped swing arm, comprising a first arm, a connecting portion, and a second arm connected in sequence, wherein the first arm forms a contact position that contacts the target member, and the second arm forms a linkage position, and the linkage position abuts against the stroke amplification component;

[0020] Wherein, the connecting part is rotatably mounted on the shell.

[0021] Optionally, in the above detection device, the detection component includes a piezoresistive sensor connected to the contact member;

[0022] When the contact member changes position, the piezoresistive sensor is pressed to generate the detection signal.

[0023] Optionally, in the above detection device, the target part includes a warped area formed by not being installed in place;

[0024] At least one piezoresistive sensor is disposed on the contact member to detect a lifted area of ​​the target member.

[0025] Optionally, in the above-mentioned detection device, the contact member is an L-shaped swing arm, the L-shaped swing arm includes a connecting part, the connecting part is rotatably connected to an external fixing member, and the detection component includes a second angular displacement sensor, and the second angular displacement sensor is connected to the connecting part.

[0026] A battery production device includes a sealing nail detection device and / or a battery detection device, wherein the sealing nail detection device is used to detect whether the sealing nail is warped, and the battery detection device is used to detect whether the upper surface of the battery is warped. The sealing nail detection device and the battery detection device are both the aforementioned detection devices.

[0027] In the detection device and battery production equipment provided by the present application, the contact piece can directly contact the sealing pin, and the sealing pin with a raised area can cause the contact piece to change position. The detection component senses the above-mentioned position change and generates a detection signal, thereby accurately determining the raised condition of the sealing pin. The detection device is a contact detection device, which can identify subtle changes in the height of the sealing pin, and can also accurately identify small raised pins, thereby ensuring the subsequent welding effect of the sealing pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the detection device of this application;

[0030] Figure 2 This is a schematic diagram of the structure of the detection device of this application without the shell installed;

[0031] Figure 3 This is a schematic diagram of the structure of the battery production equipment of this application.

[0032] Figure 1-Figure 3 :

[0033] 1. Contact piece; 2. Detection component; 3. Travel amplification component; 4. Housing; 5. Bearing; 6. Detection device; 7. Pressing nail device;

[0034] 11. first arm; 12. connecting portion; 13. second arm;

[0035] 31. Screw rod; 32. First gear; 33. Second gear; 34. Third gear; 35. Elastic reset member;

[0036] 111, contact position;

[0037] 131, linkage position;

[0038] 351, first end; 352, second end. DETAILED DESCRIPTION

[0039] The present application provides a detection device and also provides a battery production equipment including the detection device.

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only 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.

[0041] like Figure 1-2 As shown, the present application discloses a detection device for detecting whether a target part is installed in place; the detection device includes a contact member 1 and a detection component 2. The contact member 1 is used to contact the target part. The detection component 2 senses the position change of the contact member 1 and generates a detection signal to determine whether the target part is installed in place according to the generated detection signal. When the target part in contact with the contact member 1 is not installed in place, the contact member 1 changes position under the abutment of the target part.

[0042] It should be noted that when it is necessary to detect whether the target part is installed in place, the contact member 1 of the detection device can be placed on the surface of the target part.

[0043] The target part is installed in place means that the target part is placed in the target installation position and does not deviate from the target installation position. The target part is not installed in place means that the target part deviates from the target installation position. When the target part is a sealing nail installed in the liquid injection hole of the battery, the upper surface of the battery includes a surrounding portion surrounding the opening of the liquid injection hole, and the target installation position is the area where the liquid injection hole and the surrounding portion are located; the sealing nail is installed in place means that the nail body of the sealing nail is placed in the liquid injection hole, and the nail cap of the sealing nail happens to fit flatly on the surrounding portion; the sealing nail is not installed in place means that the nail body of the sealing nail deviates from the liquid injection hole, and the nail cap of the sealing nail is partially or completely separated from the surrounding portion and raised relative to the surrounding portion (that is, the upper surface of the battery). At this time, there is a warping area of ​​the sealing nail, and the nail warping phenomenon occurs. Detecting whether the sealing nail is installed in place means detecting whether the sealing nail is warped.

[0044] Before the detection device works, one of the target parts is used as the reference part, and the reference part is controlled to be in the installed state; at this time, the contact part 1 is brought into contact with the installed reference part, and the contact part 1 has an initial position under the contact of the reference part. At this time, the detection component 2 senses the initial position and generates an electrical signal, and the reference value is obtained by calculating and processing the electrical signal. The initial position of the contact part 1 can be controlled so that when the contact part 1 is in the initial position, the contact part 1 will not change its position under the contact of the target part.

[0045] When the detection device is working, the contact member 1 is contacted with different target members respectively. The position deviation of the target member relative to the target installation position will be fed back to the position change of the contact member 1. The position change of the contact member 1 is sensed by the detection component 2, and a detection signal is generated. The measurement value is obtained by calculating and processing the detection signal; the obtained measurement value is compared with the reference value to determine the installation status of the target member. When the reference value is the same as the measured value, it is determined that the target member is in the installed state; when there is a difference between the reference value and the measured value, it is determined that the target member is not in the installed state, and based on the difference between the two, the defocus amount of the target member relative to the target installation position is obtained, thereby monitoring and ensuring the process quality.

[0046] The defocus amount is the position offset of the target part relative to the target installation position, that is, the deviation of the target part relative to the target installation position along the position offset direction. When the target part is a sealing pin, the offset direction of the sealing pin is the extension direction of the injection hole, and the defocus amount of the sealing pin is the deviation of the area of ​​the sealing pin away from the surrounding part (that is, the raised area of ​​the sealing pin) relative to the surrounding part along the extension direction of the injection hole.

[0047] The detection device can accurately feed back the defocus amount of the target part to the position change of the contact part 1 abutting against the target part. The detection component 2 can sense the position change of the contact part 1 and generate a detection signal, and accurately determine the installation status of the target part according to the detection value generated by the detection signal. Since the detection device is a contact detection, the tiny defocus amount of the target part can also be accurately identified.

[0048] Specifically, when the target part is a sealing pin, the defocus amount of the sealing pin is accurately fed back to the contact piece 1 in contact with the sealing pin. The lifted area of ​​the sealing pin can cause the contact piece 1 to change position. The detection component 2 senses the above position change and generates a detection signal, thereby accurately detecting the lifted condition of the sealing pin; the lifted condition includes whether the pin is lifted and the defocus amount of the lifted area relative to the annular part; the detection device is a contact detection, which can identify subtle position changes of the sealing pin along the direction of the injection hole, and small lifted pins can also be accurately identified, thereby ensuring the subsequent welding effect of the sealing pin.

[0049] In some embodiments of the present application, a stroke amplification component 3 is provided between the contact member 1 and the detection component 2. The stroke amplification component 3 can amplify the displacement of the contact member 1 and output the amplified displacement. The detection component 2 detects the amplified displacement and generates a detection signal.

[0050] The defocus amount of the target part will be fed back to the position change of the contact part 1, thereby causing the contact part 1 to produce a displacement along the position offset direction of the target part; no matter how small the displacement of the contact part 1 is, it can be amplified by the stroke amplification component and output an amplified displacement; the amplified displacement is more easily sensed by the detection component 2, and a more accurate detection signal is generated accordingly, thereby more accurately detecting the defocus amount of the target part relative to the target installation position; it avoids the disadvantage that the subtle defocus amount of the target part cannot be detected and identified by the detection device, and effectively ensures the detection accuracy.

[0051] Please refer to the attached Figure 2 In some embodiments of the present application, the stroke amplification component 3 includes a screw 31, a first gear 32, and a second gear 33. The screw 31 is connected to the contact member 1 and moves driven by the contact member 1. The first gear 32 and the second gear 33 are coaxially arranged, the first gear 32 is meshed with the screw 31, and the radius of the second gear 33 is greater than the radius of the first gear 32, so as to amplify the displacement of the contact member 1 and convert it into a rotation angle.

[0052] When the position of the contact member 1 changes, it will push the screw 31 to move, thereby converting the displacement of the contact member 1 into the displacement of the screw 31; when the screw 31 moves, it will drive the first gear 32 meshing with it to rotate, thereby converting the displacement of the screw 31 into the rotational displacement of the first gear 32; when the first gear 32 rotates, it will drive the second gear 33 coaxially arranged therewith to rotate synchronously, thereby converting the rotational displacement of the first gear 32 into the rotational displacement of the second gear 33, and because the radius of the second gear 33 is larger than the radius of the first gear 32, at the same rotation angle, the rotational displacement of the second gear 33 will be much larger than the rotational displacement of the first gear 32, ultimately achieving the effect of amplifying the displacement of the contact member 1 and converting it into a rotation angle through the stroke amplification component 3.

[0053] Please refer to the attached Figure 1-2 Further, the stroke amplification component 3 includes a third gear 34, the third gear 34 is meshed with the second gear 33, and the radius of the third gear 34 is smaller than the radius of the second gear 33, so as to amplify the rotation angle. The detection component 2 includes a first angular displacement sensor coaxially arranged with the third gear 34.

[0054] It should be noted that the first angular displacement sensor may be an encoder.

[0055] When the second gear 33 rotates, it will drive the third gear 34 meshing with it to rotate synchronously, thereby converting the rotational displacement of the second gear 33 into the rotational displacement of the third gear 34. Since the radius of the third gear 34 is smaller than the radius of the second gear 33, under the same rotational displacement, the rotation angle of the third gear 34 will be much larger than the rotation angle of the second gear 33, ultimately achieving the effect of amplifying the rotation angle.

[0056] When the third gear 34 rotates, it will drive the encoder coaxially arranged therewith to rotate synchronously, thereby converting the rotation angle of the third gear 34 into the rotation angle of the encoder. As described above, the technical effect of converting the displacement of the contact member 1 into the rotation angle of the encoder is achieved through the stroke amplification component 3, and a slight displacement of the contact member 1 can be converted into a larger rotation angle of the encoder, thereby enabling the encoder to sense the slight displacement of the contact member 1 and output a more accurate detection signal accordingly, thereby ensuring the detection accuracy of the detection device.

[0057] Please refer to the attached Figure 2 In some embodiments of the present application, the stroke amplification component 3 includes an elastic reset member 35. The elastic reset member 35 drives the screw rod 31 to reset, so that the screw rod 31 drives the contact member 1 to reset.

[0058] As described above, the contact member 1 can be automatically reset to the initial position, so that the detection device does not need to be manually reset during the next round of detection, thereby saving labor costs.

[0059] In some embodiments, the elastic return member can be a spring, which includes a first end 351 close to the contact member 1 and a second end 352 away from the contact member 1; the spring is sleeved on the screw 31, the first end 351 of the spring is fixedly connected to the end of the screw 31 close to the contact member 1, and the second end 352 of the spring is fixed in the detection device and will not change position when the screw 31 moves.

[0060] When the contact member 1 is placed on the target member and moves under the contact of the target member, the contact member 1 will push the screw rod 31 to move; at the same time, the first end 351 of the spring is compressed in the direction close to the second end 352 of the spring. When the detection of the target member is completed and the contact member 1 is separated from the contact with the target member, the target member releases the contact with the contact member 1, and the contact member 1 releases the contact with the screw rod 31; at the same time, the external force of the compressed spring is released, and the second end 352 of the spring moves in the direction away from the first end 351 of the spring, and then the screw rod 31 is reset under the drive of the second end 352 of the spring, and then the contact member 1 is reset under the drive of the screw rod 31.

[0061] Please refer to the attached Figure 1In some embodiments of the present application, the detection device further comprises a housing 4 for accommodating the stroke amplification component 3 and the detection component 2. The contact member 1 is an L-shaped swing arm; the L-shaped swing arm comprises a first arm 11, a connecting portion 12, and a second arm 13 connected in sequence. The first arm 11 is formed with a contact position 111 for contacting the target member, and the second arm 13 is formed with a linkage position 131, and the linkage position 131 abuts against the stroke amplification component 3; the connecting portion 12 is rotatably mounted on the housing 4.

[0062] It should be noted that the linkage position 131 abuts against the end of the screw rod 31. The connecting portion 12 and the second arm 13 of the L-shaped swing arm are both accommodated in the housing 4.

[0063] The housing 4 is provided to achieve a safety protection effect on the stroke amplification component 3, the detection component 2 and part of the contact member 1, thereby avoiding damage caused by external collisions, avoiding the influence of dust and impurities on their working performance, and prolonging the service life of the detection device.

[0064] When the L-shaped swing arm is attached Figure 2 When placed in the position shown in the figure, the L-shaped swing arm can convert the slight displacement of the contact position 111 in the height direction into the slight displacement of the linkage position 131 in the horizontal direction, thereby realizing the spatial conversion of the displacement of the contact member 1, and then realizing the integrated setting of the detection device, making its structural arrangement more compact and the performance more stable.

[0065] Furthermore, two opposite sides of the connection part 12 are provided with connection columns respectively; the housing 4 includes a hinge area for accommodating the connection part 12, the hinge area forms a receiving space for accommodating the connection part 12, and two opposite side walls of the hinge area are provided with hinge holes opposite to the connection columns; the connection column is hinged in the hinge hole. Furthermore, the connection column is installed in the hinge hole through a bearing 5; the bearing 5 is a thrust bearing.

[0066] As described above, the thrust bearing can effectively avoid friction loss when the connecting part 12 rotates in the housing 4, and helps to quickly respond to the rotation of the contact member 1 under the abutment of the target member, thereby ensuring the sensitivity of the detection device.

[0067] In some embodiments of the present application, the detection component 2 includes a piezoresistive sensor connected to the contact member 1. When the position of the contact member 1 changes, the piezoresistive sensor is pressed to generate a detection signal.

[0068] It should be noted that the piezoresistive sensor may not be arranged on the contact piece 1, but is fixed by a support piece; at this time, when the position of the contact piece 1 changes, the piezoresistive sensor is pressed by the contact piece 1; specifically: when the target part is installed in place, the position of the contact piece 1 placed on the target part will not change, at this time the contact piece 1 and the piezoresistive sensor remain naturally connected, and the contact piece 1 will not produce a pressing force on the piezoresistive sensor; and when the target part is not installed in place, the position of the contact piece 1 placed on the target part will change, at this time the contact piece 1 is pressed and connected with the piezoresistive sensor, and the contact piece 1 presses the piezoresistive sensor, so that the piezoresistive sensor generates a detection signal.

[0069] In addition to being fixed by a support, the piezoresistive sensor may also be arranged in other forms. For example, the piezoresistive sensor is directly connected to the contact piece 1. In this case, when the position of the contact piece 1 changes, the piezoresistive sensor is pressed by the target piece. Specifically: when the target piece is installed in place, the contact piece 1 placed on the target piece will not change position, and the target piece will not produce any pressure on the piezoresistive sensor. When the target piece is not installed in place, the contact piece 1 placed on the target piece will change position, and the target piece will press against the piezoresistive sensor installed on the contact piece 1, causing the piezoresistive sensor to generate a detection signal.

[0070] Furthermore, the piezoresistive sensor may be a strain gauge; the strain gauge is attached to the contact member 1 .

[0071] When the target part is not installed in place, the target part will press against the contact part 1, causing the position of the contact part 1 to change. Since the piezoresistive sensor is arranged on the contact part 1, it will be pressed by the target part at the same time. The greater the position change of the contact part 1 under the pressure of the target part, the greater the pressure on the piezoresistive sensor. The target sensor generates a corresponding detection signal according to the pressure, and judges the installation status of the target part through the detection signal.

[0072] In some embodiments, the above-mentioned piezoresistive sensor is disposed on the contact position 111 of the first arm 11 of the L-shaped swing arm.

[0073] In some embodiments of the present application, the target part includes a lifted area formed by not being installed in place. At least one piezoresistive sensor is disposed on the contact member 1 to detect the lifted area of ​​the target part.

[0074] Preferably, a plurality of piezoresistive sensors are provided on the contact member 1, so that the piezoresistive sensors can contact different positions of the tilted target member to detect the tilted area of ​​the target member.

[0075] Furthermore, a plurality of piezoresistive sensors are disposed on the contact position 111 of the first arm 11 of the contact member 1 , and the plurality of piezoresistive sensors are numbered in sequence.

[0076] Since only the lifted area of ​​the target part can press against the piezoresistive sensor and cause the piezoresistive sensor to generate a detection signal, the lifted area of ​​the target part can be accurately determined according to the number combination of the piezoresistive sensors that can generate the detection signal. And the specific lifted position and degree of the target part can be determined according to the detection value obtained from the detection signal of each piezoresistive sensor.

[0077] In some embodiments of the present application, the contact member 1 is an L-shaped swing arm, which includes a connecting portion 12 rotatably connected to an external fixing member. The detection component 2 includes a second angular displacement sensor, which is connected to the connecting portion 12 .

[0078] It should be noted that the second angular displacement sensor may be an encoder.

[0079] As described above, the second angular displacement sensor is used to directly detect the rotation angle of the connection part 12 and generate a detection signal. When the target part is installed in place, the contact member 1 placed on the target part will not rotate; when the target part is not installed in place, the contact member 1 placed on the target part will rotate; the second angular displacement sensor is used to detect whether the connection part 12 rotates to determine whether the target part is installed in place; the second angular displacement sensor is used to detect the rotation angle of the connection part 12 to obtain the defocus amount of the target part.

[0080] Please refer to the attached Figure 3 In summary, the present application also provides a battery production device, including a sealing nail detection device and / or a battery detection device. The sealing nail detection device is used to detect whether the sealing nail is warped, and the battery detection device is used to detect whether the upper surface of the battery is warped. The sealing nail detection device and the battery detection device are both the detection device 6 described above.

[0081] It should be noted that when testing the sealing nail, it is necessary to ensure that the battery is installed in place, that is, the upper surface of the battery needs to be flush with the positioning reference plane (that is, the defocus of the upper surface of the battery relative to the reference plane is 0). The upper surface of the battery includes a surrounding portion surrounding the opening of the injection hole; the sealing nail is installed in place means that the nail body of the sealing nail is placed in the injection hole and does not deviate from the position of the injection hole, and the nail cap of the sealing nail happens to fit flatly on the surrounding portion.

[0082] The battery is fixed on the frame of the battery production equipment by the battery clamp; the sealing nail is first installed on the injection hole by the nail pressing device 7; and then the sealing nail is detected by the sealing nail detection device. The contact member 1 of the sealing nail detection device is placed on the surface of the sealing nail to detect whether the sealing nail is tilted relative to the surrounding part (i.e., the upper surface of the battery) and the defocus amount of the tilted area of ​​the sealing nail relative to the surrounding part.

[0083] By setting up a battery detection device, it is possible to detect whether the battery is installed in place, and the defocus amount of the upper surface of the battery relative to the reference plane. Due to the existence of the battery detection device, when the sealing nail is lifted up by the sealing nail detection device, the installation of the battery can be ignored, and the defocus amount measured by the battery detection device can be used as the calibration parameter of the sealing nail detection device. As above, the influence of the battery's failure to be installed in place on the sealing nail detection result is avoided, and it is possible to accurately obtain whether the sealing nail is lifted up, and the defocus amount of the lifted area relative to the surrounding part.

[0084] Since the battery production equipment of the present application includes a sealing nail detection device and / or a battery detection device, and the sealing nail detection device and the battery detection device are both the detection device 6 described above, the beneficial effects brought about by the sealing nail detection device and / or the battery detection device to the battery production equipment can be found above and will not be repeated here.

[0085] The components and devices involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the drawings. As will be appreciated by those skilled in the art, these components and devices can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, meaning "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0086] It should also be noted that in the device of the present application, each component can be decomposed and / or reassembled, and these decompositions and / or reassemblies should be regarded as equivalent solutions of the present application.

[0087] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0088] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0089] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A detection device, characterized in that: Used to detect whether the target part is installed in place, including: A contact member, used for contacting the target member; A detection component, sensing a position change of the contact member and generating a detection signal; Wherein, when the target part in contact with the contact part is not installed in place, the contact part changes position under the contact of the target part.

2. The detection device according to claim 1, characterized in that: A stroke amplification component is provided between the contact member and the detection component; The stroke amplification component can amplify the displacement of the contact member and output the amplified displacement; The detection component detects the amplified displacement and generates the detection signal.

3. The detection device according to claim 2, characterized in that: The stroke amplification component comprises: A screw rod connected to the contact member and moving under the drive of the contact member; A first gear and a second gear are coaxially arranged, the first gear is meshed with the screw rod, and the radius of the second gear is greater than the radius of the first gear, so as to amplify the displacement of the contact member and convert it into a rotation angle.

4. The detection device according to claim 3, characterized in that: The stroke amplification component includes a third gear, the third gear is meshed with the second gear, and the radius of the third gear is smaller than the radius of the second gear, so as to amplify the rotation angle; The detection assembly includes a first angular displacement sensor coaxially arranged with the third gear.

5. The detection device according to claim 3, characterized in that: The stroke amplification component includes an elastic reset member, and the elastic reset member drives the screw rod to reset, so that the screw rod drives the contact member to reset.

6. The detection device according to any one of claims 2 to 5, characterized in that: It also includes a housing for accommodating the stroke amplification component and the detection component; The contact member is an L-shaped swing arm, comprising a first arm, a connecting portion, and a second arm connected in sequence, wherein the first arm forms a contact position that contacts the target member, and the second arm forms a linkage position, and the linkage position abuts against the stroke amplification component; Wherein, the connecting part is rotatably mounted on the shell.

7. The detection device according to claim 1, characterized in that: The detection assembly includes a piezoresistive sensor connected to the contact member; When the contact member changes position, the piezoresistive sensor is pressed to generate the detection signal.

8. The detection device according to claim 7, characterized in that: The target part includes a warped area formed by not being installed in place; At least one piezoresistive sensor is disposed on the contact member to detect a lifted area of ​​the target member.

9. The detection device according to claim 1, characterized in that: The contact member is an L-shaped swing arm, which includes a connecting portion, and the connecting portion is rotatably connected to an external fixing member. The detection component includes a second angular displacement sensor, and the second angular displacement sensor is connected to the connecting portion.

10. A battery production device, characterized in that: It includes a sealing nail detection device and / or a battery detection device, wherein the sealing nail detection device is used to detect whether the sealing nail is warped, and the battery detection device is used to detect whether the upper surface of the battery is warped. The sealing nail detection device and the battery detection device are both the detection devices described in any one of claims 1-9.

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