Top cover welding device

Abstract

A top cover welding device, comprising: a battery driving mechanism, used for clamping a battery and driving the battery to rotate, wherein the battery comprises a first end surface and a second end surface opposite to each other in a first direction, and a top cover is pre-fixed on the first end surface; and a servo-actuated localizing mechanism, spaced apart from the battery driving mechanism in the first direction and comprising a fixing support and a top cover protection plate rotatably connected to the fixing support, wherein the top cover protection plate abuts against the top cover and rotates synchronously with the top cover, the servo-actuated localizing mechanism further comprises a sensor, the sensor is arranged on the fixing support, and the sensor is used for acquiring location information of different locations of the top cover.

Description

Top cover welding device

[0001] The present disclosure claims priority to the Chinese patent application No. 202421832560.9, filed on July 30, 2024, and entitled "Top cover welding device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to a top cover welding device. BACKGROUND

[0003] During the production process of a battery, there is a process of welding a top cover on the end face of the battery. In the related art, a battery clamping tool is usually used to position the battery and drive the battery and a pre-fixed top cover to rotate. In order to prevent the pollution of the pole and the liquid injection port on the top cover during the welding process, a top cover protection plate needs to be used to shield the top cover during the welding process, which requires the top cover protection plate to rotate synchronously with the top cover.

[0004] Therefore, two sets of servo systems need to be configured in the top cover welding device, one set is used to drive the battery to rotate, and the other set is used to drive the top cover protection plate to rotate, so as to ensure that the top cover protection plate can always shield the top cover during the welding process of the top cover. However, due to the difficulty of ensuring absolute synchronism of the two sets of servo systems, and the installation reference of the two sets of servo systems is also different, combined with the fact that the top cover pre-fixed to the battery also has a certain offset, these factors will directly affect the welding quality of the top cover, and increase the defective rate of the top cover welding. SUMMARY

[0005] The present disclosure discloses a top cover welding device, which can detect the position of the top cover during the welding process of the top cover, and adjust the welding scheme according to the detection result, thereby improving the yield of the top cover welding.

[0006] In order to achieve the above-mentioned purpose, in a first aspect, the present disclosure discloses a top cover welding device, comprising: a battery driving mechanism, the battery driving mechanism is used to clamp the battery and drive the battery to rotate, the battery comprises a first end face and a second end face opposite along a first direction, and a top cover is pre-fixed on the first end face; a follow-up positioning mechanism, the follow-up positioning mechanism is arranged in the first direction and spaced apart from the battery driving mechanism, the follow-up positioning mechanism comprises a fixed support and a top cover protection plate rotationally connected with the fixed support, the top cover protection plate abuts against the top cover and rotates synchronously with the top cover, and the follow-up positioning mechanism further comprises at least two sensors, the at least two sensors are arranged on the fixed support, and the sensors are used to obtain position information of different positions of the top cover.

[0007] In a possible implementation, the sensor is a contact sensor; the follow-up positioning mechanism further comprises a pushing assembly arranged on the fixed support, an active end of the pushing assembly being connected to the sensor, and the pushing assembly being capable of pushing the sensor to reciprocate along the first direction to abut against or separate from the top cover.

[0008] In a possible implementation, the top cover protection plate is provided with a first avoiding groove for avoiding the at least partial sensor, and when the pushing assembly pushes the sensor to move along the first direction, the sensor extends into the first avoiding groove to abut against the top cover.

[0009] In a possible implementation, the at least two sensors are respectively located on two sides of the top cover protection plate along a second direction, and the second direction is perpendicular to the first direction.

[0010] In a possible implementation, the top cover protection plate is connected to the fixed support through a rotating shaft, and the top cover protection plate is flexibly connected to the rotating shaft; the follow-up positioning mechanism further comprises a positioning assembly arranged on the pushing assembly; when the pushing assembly pushes the sensor to abut against the top cover along the first direction, the pushing assembly is capable of simultaneously pushing the positioning assembly to abut against the top cover protection plate and the top cover to position the top cover protection plate and the top cover along the first direction.

[0011] In a possible implementation, the pushing assembly comprises: a linear slide rail arranged on the fixed support, the linear slide rail extending along the first direction; a mounting member movably arranged on the linear slide rail, the sensor and the positioning assembly being arranged on the mounting member; and a driving member arranged on the fixed support, a driving end of the driving member being connected to the mounting member.

[0012] In a possible implementation, the follow-up positioning mechanism further comprises: a limiting member arranged on the fixed support, the limiting member being capable of abutting against the mounting member to limit the movement stroke of the mounting member along the first direction.

[0013] In a possible implementation, the positioning assembly comprises: a top cover end surface positioning plate arranged on the mounting member, the top cover end surface positioning plate being used for abutting against an end surface of the top cover; and a positioning member arranged on the mounting member, the positioning member being capable of abutting against a side of the top cover protection plate away from the top cover; wherein along the first direction, the detection end of the sensor is closer to the battery driving mechanism than the top cover end surface positioning plate; along the second direction, the top cover end surface positioning plate and the positioning member avoid each other, and the second direction is perpendicular to the first direction.

[0014] In a possible implementation, the top cover end surface positioning plate is formed with a second avoiding groove close to an end of the top cover protection plate, and the at least partial sensor is located in the second avoiding groove.

[0015] In a possible implementation, the top cover end face positioning plate is located on one side of the top cover protection plate in the second direction when the top cover end face positioning plate abuts against the top cover.

[0016] In a possible implementation, the top cover protection plate comprises: a body portion configured to abut against the top cover; and a connecting portion rotationally connected to the rotating shaft, the connecting portion being provided with a positioning groove on a side thereof away from the body portion, the positioning member being movable in the first direction and insertable into the positioning groove.

[0017] In a possible implementation, the top cover protection plate further comprises: a connecting member having one end connected to the body portion and the other end penetrating through the connecting portion and movably connected to the connecting portion, the body portion and the connecting portion having a movable gap therebetween; and an elastic member located between the body portion and the connecting portion.

[0018] In a possible implementation, the mounting member comprises a mounting plate slidably connected to the linear slide rail, and a mounting block provided on the mounting plate; the sensor and the positioning assembly are respectively provided on the mounting block, and the mounting block is located on the side of the mounting plate close to the battery driving mechanism.

[0019] In a possible implementation, the driving end of the driving member is provided on the mounting plate, the mounting plate is provided with a clearance region communicated with the side surface of the mounting plate facing the battery driving mechanism; the follow-up positioning mechanism further comprises a support assembly connected to the rotating shaft, the support assembly being provided on the fixed support and located in the clearance region, and the mounting plate avoids the support assembly when the driving member drives the mounting plate to slide in the first direction.

[0020] In a possible implementation, the support assembly further comprises: a bearing seat provided on the fixed support; and a bushing sleeved on the rotating shaft, the rotating shaft being provided on the bearing seat through the bushing.

[0021] In a possible implementation, the mounting block is configured as two, the two mounting blocks being respectively located on two sides of the clearance region in the second direction; and the positioning assembly is configured as two, each positioning assembly being symmetrically arranged along the center line of the top cover protection plate in the second direction.

[0022] In a possible implementation, the mounting plate further comprises a limiting groove, an opening of the limiting groove being communicated with the clearance region; the limiting groove corresponds to the support assembly in the first direction, and at least part of the support assembly is inserted into the limiting groove when the driving member drives the mounting plate to slide in the first direction.

[0023] Compared with the prior art, the present disclosure has the following beneficial effects:

[0024] The top cover welding device provided by the embodiment of the present disclosure has the advantages that the top cover protection plate configured in the follow-up positioning mechanism can be driven to rotate by the battery, the top cover protection plate protects the top cover during the welding process, the synchronization of the top cover protection plate and the battery is high, and thus the welding effect of the top cover and the battery is ensured. Meanwhile, the sensor configured in the follow-up positioning mechanism can obtain the position information of the top cover, so that the controller of the top cover welding device adjusts the welding parameters of the welding mechanism according to the position information, and thus the yield of the top cover welded on the battery is further improved.

[0025] Additional aspects and advantages of the present disclosure will be described in the following description, become apparent from the following description, or be understood by those skilled in the art through practice of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0027] FIG. 1 is a front view of a top cover welding device provided by an embodiment of the present disclosure;

[0028] FIG. 2 is a side view of a top cover welding device provided by an embodiment of the present disclosure;

[0029] FIG. 3 is a top view of a top cover welding device provided by an embodiment of the present disclosure;

[0030] FIG. 4 is a front view of a follow-up positioning mechanism in a top cover welding device provided by an embodiment of the present disclosure;

[0031] FIG. 5 is a top view of a follow-up positioning mechanism in a top cover welding device provided by an embodiment of the present disclosure;

[0032] FIG. 6 is a side view of a follow-up positioning mechanism in a top cover welding device provided by an embodiment of the present disclosure;

[0033] FIG. 7 is a top view of a mounting plate in a top cover welding device provided by an embodiment of the present disclosure;

[0034] FIG. 8 is a test diagram of a mounting plate in a top cover welding device provided by an embodiment of the present disclosure.

[0035] Explanation of reference signs: 100 - top cover; 01 - top cover welding assembly; 10 - battery driving mechanism; 101 - clamp 101; 20 - follow-up positioning mechanism; 201 - top cover protection plate; 2011 - first avoiding groove; 2012 - body part; 2013 - connecting part; 2014 - connecting piece; 2015 - elastic piece; 202 - fixed support; 203 - sensor; 2031 - contact end 2031; 204 - pushing assembly; 2041 - linear slide rail; 2042 - mounting member; 2043 - driving piece; 2044 - mounting plate; 2045 - empty area; 2046 - limiting groove; 2047 - mounting block; 205 - rotating shaft; 206 - positioning assembly; 2061 - top cover end face positioning plate; 2061a - second avoiding groove; 2062 - positioning piece; 207 - limiting piece; 208 - supporting assembly. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present disclosure.

[0037] In the present disclosure, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0038] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present disclosure according to the specific situation.

[0039] In addition, the terms "mounting", "setting", "provided with", "connection", "connected" should be understood broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication between two devices, elements or components. Those of ordinary skill in the art can understand the specific meaning of the above-mentioned terms in the present disclosure according to the specific situation.

[0040] In addition, the terms "first", "second", and the like are mainly used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "a plurality" is two or more.

[0041] The blade battery generally has a flat and long appearance structure, and the top cover needs to be welded at both ends of the blade battery along the length direction. The top cover is provided with a pole and a liquid injection port. The pole is used to conduct current between the battery and the external circuit, and the liquid injection port is used to inject electrolyte into the battery. Since the pole needs to conduct the external circuit, the liquid injection port needs to be sealed, so during the process of welding the top cover to the end of the battery, the top cover needs to be protected to prevent the smoke and flying sword generated by the welding environment from polluting and damaging the pole and the liquid injection port.

[0042] Before full welding of the top cover and the battery, the end of the top cover and the battery can be spot welded first. During full welding, the top cover protection plate needs to rotate synchronously with the top cover to ensure that the top cover protection plate always shields the pole and the liquid injection port during welding. Therefore, the rotation synchronization of the top cover protection plate and the battery will directly affect the welding effect of the top cover.

[0043] In addition, the relative position of the top cover after pre-welding relative to the battery also has a great influence on the welding effect. If the position of the top cover after spot welding is deviated, the welding scheme needs to be adjusted to correct the position of the top cover.

[0044] Based on the above, the present disclosure proposes a top cover welding device to solve the problem of poor welding effect of welding the top cover to the battery in the related art. Specifically, a sensor is configured in the top cover welding device to obtain the position information of the top cover after spot welding.

[0045] As shown in FIGS. 1-3, a structure schematic diagram of a top cover welding device 01 is shown, which includes a battery driving mechanism 10 for clamping and rotating the battery. The battery includes a first end face and a second end face opposite in the first direction, and the first end face is pre-fixed with a top cover 100.

[0046] The top cover welding device 01 includes a battery driving mechanism 10, which can include a clamp 101 capable of positioning and clamping the battery. The battery driving mechanism 10 can also include a motor connected with the clamp 101 and capable of driving the clamp 101 to rotate to drive the battery to rotate.

[0047] The battery extends along a first direction, which is the X direction shown in FIGS. 1 and 3, and the Z direction shown in FIGS. 1 and 3 is the height direction of the top cover welding device 01. A second direction, that is, the Y direction, is also shown in FIGS. 2 and 3, and the second direction is perpendicular to the first direction.

[0048] The battery has a first end face and a second end face at two ends along the first direction, and the top cover 100 can be pre-fixed on the first end face and the second end face of the battery by spot welding. The embodiments of the present disclosure take the top cover 100 on the first end face as an example for description, and the process of welding the top cover 100 on the second end face of the battery by the top cover welding device 01 is the same as the process of welding the top cover 100 on the first end face.

[0049] The top cover welding device 01 further comprises a follow-up positioning mechanism 20, which is arranged along the first direction and spaced apart from the battery driving mechanism 10, that is, the follow-up positioning mechanism 20 is located on one side of the first end face of the battery along the first direction.

[0050] The follow-up positioning mechanism 20 comprises a top cover protection plate 201, which can be closely abutted with the top cover 100, so that the top cover protection plate 201 can be synchronously rotated with the battery by friction.

[0051] As shown in FIG. 1, the follow-up positioning mechanism 20 further comprises a fixed support 202, and the top cover protection plate 201 is rotationally connected with the fixed support 202, so that when the motor mechanism drives the clamp 101 to rotate, the top cover 100 on the first end face of the battery will drive the top cover protection plate 201 to synchronously rotate. Since the top cover protection plate 201 is rotationally connected with the fixed support 202, the rotation driving source of the top cover protection plate 201 is the battery, so the rotation of the top cover protection plate 201 and the rotation of the battery must be synchronous. Compared with the scheme that the related art configures a set of servo system for the top cover protection plate 201, the follow-up positioning mechanism 20 in the embodiments of the present disclosure not only saves a servo system, but also ensures the synchronism of the rotation of the top cover protection plate 201 and the battery, so that the top cover protection plate 201 will not produce adverse effects such as friction and collision with the top cover 100 during the welding process.

[0052] The follow-up positioning mechanism 20 further comprises a sensor 203, which is arranged on the fixed support 202. The sensor 203 is used to detect the position information of the top cover 100, which can indicate the welding state of the top cover 100 after being spot-welded to the battery, such as the flatness of the top cover 100, the size of the weld between the top cover 100 and the battery, etc. The sensor 203 can be connected with a controller configured in the top cover welding device 01 to feed back the position information of the top cover 100 to the controller. The position information can include distance information and angle information between the top cover 100 and a certain reference point (such as the sensor 203 itself).

[0053] Specifically, the number of sensors 203 can be at least two, so as to perform multi-point detection on the top cover 100. The at least two sensors 203 obtain position information of different area points of the top cover 100, and the position information at each point can be compared to more accurately determine whether the top cover 100 is uneven, skewed or offset after spot welding.

[0054] For example, the detection ends of the at least two sensors 203 are flush along the second direction and face the top cover 100, each sensor 203 can obtain distance information between the sensor 203 and the top cover 100, and different sensors 203 are used to detect different areas of the top cover 100. If the distance information obtained by the at least two sensors 203 is different, it indicates that the top cover 100 is uneven, skewed or offset.

[0055] For example, the detection ends of the at least two sensors 203 can also have a spacing along the first direction, and the spacing can be a fixed value. The distance information obtained by each sensor 203 in combination with the spacing difference between the detection ends of the sensors 203 along the first direction can also determine whether the top cover 100 is uneven, skewed or offset.

[0056] Optionally, the sensors 203 can be fixed on the fixed support 202, so that the sensors 203 can obtain the position information of the top cover 100 without contacting the top cover 100. The sensors 203 can be selected from photoelectric sensors 203, vision sensors 203 or ultrasonic sensors 203.

[0057] Optionally, the sensors 203 can also be movably arranged on the fixed support 202, and the position information of the top cover 100 can be obtained by contacting the top cover 100. The sensors 203 can be selected from tolerance type position sensors 203 and displacement sensors 203.

[0058] Further, the top cover welding device 01 is also provided with a welding mechanism, which can weld along the circumference of the first end face of the battery to fully weld the top cover 100 and the first end face of the battery. The welding mechanism is also connected with the controller, and the controller can determine the welding parameters of the welding mechanism, such as the welding angle and the welding position, according to the position information of the top cover 100 obtained by the sensors 203, so as to adjust the welding scheme of the welding mechanism according to the position of the top cover 100, and thus adjust the welding state of the full welding of the top cover 100 to the battery.

[0059] For example, if the controller determines that the position offset of the top cover 100 after spot welding is relatively serious according to the position information fed back by the sensors 203, and the weld between the top cover 100 and the battery is too large to be compensated and corrected by full welding, the welding of the top cover 100 and the battery can be abandoned.

[0060] Therefore, the top cover welding device 01 provided by the embodiment of the present disclosure can protect the top cover 100 by the top cover protection plate 201 driven by the battery during the welding process, and the synchronization of the top cover protection plate 201 and the battery is high, thereby ensuring the welding effect of the top cover 100 and the battery. At the same time, at least two sensors 203 are arranged in the follow-up positioning mechanism 20, and the position information of the top cover 100 can be obtained by the at least two sensors 203, so that the controller of the top cover welding device 01 determines the welding state of the top cover 100 and adjusts the welding parameters of the welding mechanism according to the position information, thereby further improving the yield of the top cover 100 welded on the battery.

[0061] In order to further improve the detection accuracy of the sensor 203, in some embodiments, the sensor 203 is a contact sensor. Specifically, the sensor 203 can be a GT series sensor of the contact sensor. Compared with the non-contact photoelectric sensor 203, the visual sensor 203 and the like, the detection accuracy of the contact sensor 203 is higher. More importantly, in the welding scene, there are usually high temperature, smoke and splashing characteristics, and the contact sensor 203 is more suitable for the welding working condition compared with the photoelectric sensor 203 which needs to clean the working environment, and can maintain the detection accuracy and reliability.

[0062] As shown in FIGS. 4 and 5, the follow-up positioning mechanism 20 further comprises a pushing assembly 204 arranged on the fixed support 202, and the movable end of the pushing assembly 204 can be directly or indirectly connected to the sensor 203. The pushing assembly 204 can push the sensor 203 to reciprocate along the first direction to abut against or separate from the top cover 100, so that the sensor 203 completes the position detection of the top cover 100.

[0063] It can be understood that, since the top cover 100 needs to be kept in a rotating state during the welding process, the sensor 203 needs to detect the position of the top cover 100 before welding the top cover 100. The pushing assembly 204 pushes the sensor 203 to move along the first direction, so that the contact end 2031 of the sensor 203 can abut against the top cover 100. The contact end 2031 can be slightly displaced relative to the shell of the sensor 203 and elastically connected to the working part inside the shell. The slight displacement of the contact end 2031 can enable the working part of the sensor 203 to detect the position information of the top cover 100. After the detection is completed, the pushing assembly 204 pulls the sensor 203 back to the initial position, and the controller of the top cover welding device 01 controls the driving motor of the battery positioning mechanism to drive the clamp 101 to rotate, so as to avoid interference between the sensor 203 and the top cover 100, and to ensure the service life of the sensor 203.

[0064] In some embodiments, as shown in FIG. 6, the top cover protection plate 201 is provided with a first avoiding slot 2011 for avoiding the sensor 203. The first avoiding slot 2011 penetrates through the top cover protection plate 201 along the first direction. In this way, during the process that the pushing assembly 204 pushes the sensor 203 to approach the top cover 100 along the first direction, the contact end 2031 of the sensor 203 can pass out of the first avoiding slot 2011 and expose the top cover protection plate 201 to abut against the top cover 100.

[0065] The number of the first avoiding slots 2011 is consistent with the number of the sensors 203. When the servo positioning mechanism 20 is provided with multiple sensors 203, the first avoiding slots 2011 are also provided as multiple, and the first avoiding slots 2011 are located on the moving path of the sensors 203 along the first direction.

[0066] In order to further detect the flatness of the surface of the top cover 100, in some embodiments, at least two sensors 203 are respectively located on both sides of the top cover protection plate 201 along the second direction which is perpendicular to the first direction. For the convenience of description, at least two sensors 203 are taken as an example in the following embodiments.

[0067] As shown in FIG. 5 and FIG. 6, the two sensors 203 can be symmetrically arranged relative to the top cover protection plate 201 and respectively located on both sides of the top cover protection plate 201 along the second direction. In this way, the position information of the top cover 100 obtained by the sensors 203 located on both sides of the top cover 100 can be verified with each other. If the position information obtained by the two sensors 203 is basically consistent, it indicates that the flatness of the top cover 100 is good. If there is a significant difference between the position information obtained by the two sensors 203, the top cover 100 after spot welding may have local unevenness, offset, skew and other defects. In the case of serious defects, the welding of the top cover 100 may need to be directly abandoned.

[0068] In order to ensure the fit between the top cover protection plate 201 and the top cover 100, in some embodiments, the top cover protection plate 201 and the fixed support 202 are connected through the rotating shaft 205, and the top cover protection plate 201 is flexibly connected with the rotating shaft 205.

[0069] The top cover protection plate 201 is connected with the rotating shaft 205 which is arranged on the fixed support 202. It can be understood that the fixed support 202 provides structural support for the top cover protection plate 201, and because the top cover protection plate 201 is connected with the rotating shaft 205, the top cover protection plate 201 is allowed to rotate synchronously after being limited and matched with the top cover 100 in structure.

[0070] The top cover protection plate 201 is flexibly connected with the rotating shaft 205. In this way, the top cover protection plate 201 can be slightly adjusted in position relative to the rotating shaft 205 within a certain range, so that the top cover protection plate 201 can better adapt to the top cover 100 in different spot welding states, and the top cover protection plate 201 can realize self-adaptive cooperation when the top cover 100 is in different horizontal states.

[0071] As shown in FIG. 5, the follow-up positioning mechanism 20 further comprises a positioning assembly 206 arranged in the pushing assembly 204. When the pushing sensor 203 abuts against the top cover 100 in the first direction, the pushing assembly 204 can simultaneously push the positioning assembly 206 to abut against the top cover protection plate 201 and the top cover 100, so as to position the top cover protection plate 201 and the top cover 100 in the first direction.

[0072] It can be understood that, since the top cover protection plate 201 is flexibly connected with the rotating shaft 205, the top cover protection plate 201 can not be tightly fitted with the top cover 100. Therefore, the positioning assembly 206 is arranged in the follow-up positioning mechanism 20. The positioning assembly 206 is connected with the movable end of the pushing assembly 204. The pushing assembly 204 can push the positioning assembly 206 to move relative to the fixed support 202 in the first direction, so that at least part of the positioning assembly 206 abuts against the top cover protection plate 201. The positioning assembly 206 can exert pressure on the top cover protection plate 201 in the first direction, so that the top cover protection plate 201 is pressed against the top cover 100. The top cover protection plate 201 is provided with a matching groove for accommodating the pole on the top cover 100, so as to prevent the pole from being contaminated during welding.

[0073] Further, during the movement of the pushing assembly 204 in the first direction to push the positioning assembly 206, the positioning assembly 206 can not only abut against the top cover protection plate 201, but also abut against the top cover 100 itself. In this way, by positioning the top cover 100 through the positioning assembly 206, it can be further ensured that the top cover protection plate 201 is tightly pressed against the top cover 100.

[0074] It is worth noting that, by reasonably setting the positional relationship between the positioning assembly 206 and the sensor 203, it can be ensured that when the pushing assembly 204 pushes the sensor 203 to abut against and detect the position of the top cover 100, the positioning assembly 206 can also simultaneously push the positioning assembly 206 to abut against the top cover 100 and the top cover protection plate 201. In this way, only one pushing operation of the pushing assembly 204 is needed to simultaneously complete the operation of tightly pressing the top cover protection plate 201 against the top cover 100 and the detection operation of the sensor 203 on the position of the top cover 100, thereby improving the working efficiency of the top cover welding device 01.

[0075] In order to realize the driving of the sensor 203 and the positioning assembly 206 by the pushing assembly 204, in some embodiments, as shown in FIG. 5 and FIG. 6, the pushing assembly 204 comprises a linear slide rail 2041 arranged on the fixed support 202, a mounting member 2042 movably arranged on the linear slide rail 2041, the sensor 203 and the positioning assembly 206 arranged on the mounting member 2042, and a driving member 2043 arranged on the fixed support 202, the driving end of the driving member 2043 connected to the mounting member 2042.

[0076] The mounting member 2042 is movably arranged on the linear slide rail 2041, and the linear slide rail 2041 extends along the first direction to ensure that the mounting member 2042 can stably reciprocate along the first direction. The sensor 203 and the positioning assembly 206 are both arranged on the mounting member 2042, so that the sensor 203 and the positioning assembly 206 can also always reciprocate along the first direction to ensure the consistency of the movement of the sensor 203 and the positioning assembly 206.

[0077] The driving member 2043 is arranged on the fixed support 202 and connected to the mounting member 2042, so as to drive the mounting member 2042 and the sensor 203 and the positioning assembly 206 arranged on the mounting member 2042 to stably move along the first direction. Optionally, the driving member 2043 can be a driving cylinder, an electric push rod or a linear motor.

[0078] In order to ensure the consistency of the movement stroke of the sensor 203 and the positioning assembly 206 each time, in some embodiments, the following positioning mechanism 20 further comprises a limiting member 207 arranged on the fixed support 202, and the limiting member 207 can abut against the mounting member 2042 to limit the movement stroke of the mounting member 2042 along the first direction.

[0079] The limiting member 207 can be a limiting screw, which can be fixed on the fixed support 202. When the driving member 2043 pushes the mounting member 2042 to move along the first direction, the limiting member 207 can limit the maximum stroke of the mounting member 2042 to ensure the consistency of the stroke of the mounting member 2042 pushed out by the driving member 2043 each time.

[0080] By reasonably setting the fixed position of the limiting member 207, when the mounting member 2042 is limited by the limiting member 207, it can be ensured that the positioning assembly 206 can abut against the top cover protection plate 201 and position the top cover 100, and the contact end 2031 of the sensor 203 abuts against the top cover 100 to complete the detection of the position of the top cover 100.

[0081] In some embodiments, as shown in FIG. 5 and FIG. 6, the positioning assembly 206 comprises a top cover end face positioning plate 2061, which is arranged on the mounting member 2042 and used to abut against the end face of the top cover 100.

[0082] It should be noted that although the top cover 100 is covered by the top cover protection plate 201, the top cover protection plate 201 can not completely cover the top cover 100, and the top cover 100 can have at least a part of the surface not covered by the top cover protection plate 201. The top cover end face positioning plate 2061 can be used to abut against the part of the top cover 100 not covered by the top cover protection plate 201 to position the top cover 100.

[0083] The positioning member 2062 is also arranged on the mounting member 2042. Since the positioning member 2062 is used to abut against the side of the top cover protection plate 201 away from the top cover 100, the positioning member 2062 can have a smaller volume to reduce the space occupation of the follow-up positioning mechanism 20, so that the follow-up positioning mechanism 20 is more compact. Alternatively, the positioning member 2062 can be any one of a pin and a screw.

[0084] In the first direction, the positioning face of the top cover end face positioning plate 2061 is closer to the battery driving mechanism 10 than the positioning face of the positioning member 2062, so as to ensure that, under the pushing of the pushing assembly 204, the top cover end face positioning plate 2061 abuts against the top cover 100, and the positioning member 2062 abuts against the side of the top cover protection plate 201 away from the top cover 100.

[0085] Further, the contact end 2031 of the sensor 203 is closer to the battery driving mechanism 10 than the top cover end face positioning plate 2061. When the pushing assembly 204 drives the sensor 203 and the top cover end face positioning plate 2061 to move together, the contact end 2031 of the sensor 203 first contacts the top cover 100, and then the top cover end face positioning plate 2061 and other parts (elastically connected with the contact end 2031) of the sensor 203 continue to move in the first direction until the top cover end face positioning plate 2061 abuts against the top cover 100. Since the contact end 2031 of the sensor 203 is positioned by the top cover 100, the contact end 2031 is elastically connected with the working components in the sensor 203, so as to trigger the working components to output different detection data.

[0086] Further, in the second direction, the top cover end face positioning plate 2061 and the positioning member 2062 are mutually avoided, so as to ensure that the top cover end face positioning plate 2061 and the positioning member 2062 are mutually staggered in the second direction, so as to abut against the part of the top cover 100 not covered by the top cover protection plate 201 and the top cover protection plate 201 respectively.

[0087] Due to the limited space of the top cover 100 along the second direction, the top cover end face positioning plate 2061 and the top cover protection plate 201 need to be as close as possible along the second direction. In order to avoid the detection of the top cover end face positioning plate 2061 to the sensor 203 from interference, in some embodiments, the top cover end face positioning plate 2061 is formed with a second avoiding groove 2061a near the end of the top cover protection plate 201, and at least part of the sensor 203 is located in the second avoiding groove 2061a. In this way, the top cover end face positioning plate 2061 will not interfere with the sensor 203, so as to ensure that the sensor 203 can abut against the top cover 100.

[0088] In order to realize the flexible connection of the top cover protection plate 201 and the rotating shaft 205, in some embodiments, as shown in FIG. 5, the top cover protection plate 201 includes a body part 2012 for abutting against the top cover 100. The body part 2012 can be configured as a plate, and the matching groove and the first avoiding groove 2011 of the top cover protection plate 201 are formed in the body part 2012. Optionally, in order to ensure the structural strength and protection performance of the body part 2012, the body part 2012 can be made of alloy, ceramic or other materials.

[0089] The top cover protection plate 201 further includes a connecting part 2013 located on the side of the body part 2012 away from the battery positioning mechanism. The connecting part 2013 is rotationally connected with the rotating shaft 205, and the connecting part 2013 is connected with the body part 2012, so that the body part 2012 can be finely adjusted in position relative to the fixed support 202. In this way, even if the spot welding states of different top covers 100 are different, the body part 2012 can be ensured to cooperate with the top cover 100 with different spot welding states.

[0090] The connecting part 2013 can be provided with a positioning groove, and the positioning piece 2062 can abut against the groove bottom of the positioning groove through the positioning groove of the connecting part 2013. In this way, the body part 2012 can be ensured to have a fine adjustment space relative to the fixed support 202 to form a limiting cooperation with the top cover 100 with different spot welding states, and the positioning of the body part 2012 by the positioning piece 2062 can ensure that the body part 2012 is pressed against the top cover 100.

[0091] In some embodiments, the top cover protection plate 201 further includes a connecting piece 2014, and a first end of the connecting piece 2014 is fixedly connected with the body part 2012. The connecting part 2013 is further provided with a through hole, and a second end of the connecting part 2013 is arranged through the through hole. The second end of the connecting part 2013 forms a limiting part, and the cross-sectional area of the limiting part is larger than that of the through hole, so as to prevent the connecting piece 2014 from being pulled out of the connecting part 2013.

[0092] Further, the length of the connecting piece 2014 can be greater than the thickness of the connecting part 2013, so that a certain play gap is formed between the body part 2012 and the connecting part 2013, which can allow the body part 2012 to be finely adjusted in position relative to the fixed support 202.

[0093] In some embodiments, the top cover protection plate 201 further comprises an elastic piece 2015, which can be located in the play gap between the body part 2012 and the connecting part 2013. The elastic piece 2015 can buffer the buffering force when the body part 2012 is pressed against the top cover 100, and the deformation force of the elastic piece 2015 can further ensure that the body part 2012 is pressed against the top cover 100.

[0094] In order to realize the support of the mounting member 2042 to the positioning assembly 206 and the sensor 203, in some embodiments, as shown in FIG. 5, the mounting member 2042 comprises a mounting plate 2044 in sliding connection with the linear slide rail 2041, and a mounting block 2047 provided on the mounting plate 2044, and the sensor 203 and the positioning assembly 206 are respectively provided on the mounting block 2047, and the mounting block 2047 is located on the side of the mounting plate 2044 close to the battery driving mechanism 10.

[0095] The mounting plate 2044 and the linear slide rail 2041 are provided with the mounting block 2047, which is used to improve the installation reference of the sensor 203 and the positioning assembly 206, so as to ensure that the height of the sensor 203 and the positioning assembly 206 can abut against the top cover 100 and the top cover protection plate 201.

[0096] The mounting block 2047 is located on the side of the mounting plate 2044 close to the battery driving mechanism 10, which can further reduce the pushing stroke of the pushing assembly 204, thereby improving the working beat of the top cover welding device 01.

[0097] The driving end of the driving member 2043 is provided on the mounting plate 2044. In order to avoid interference between the mounting plate 2044 and the top cover protection plate 201 when the mounting plate 2044 moves in the first direction, in some embodiments, as shown in FIGS. 7 and 8, the mounting plate 2044 is provided with a clearance area 2045 communicating with the side surface of the mounting plate 2044 facing the battery driving mechanism 10.

[0098] The clearance area 2045 can be provided in the middle of the mounting plate 2044, and the clearance area 2045 communicates with the side of the mounting plate 2044 facing the battery end positioning mechanism, so that the mounting plate 2044 has a U-shaped structure.

[0099] Further, the follow-up positioning mechanism 20 further comprises a support assembly 208 connected with the rotating shaft 205, the support assembly 208 is arranged on the fixed support 202 and located in the clearance area 2045, and the mounting plate 2044 avoids the support assembly 208 when the driving member 2043 drives the mounting plate 2044 to slide in the first direction.

[0100] The support assembly 208 is arranged on the fixed support 202, and the support assembly 208 is used for providing structural support for the rotating shaft 205, and the rotating shaft 205 can rotate relative to the support assembly 208. The support assembly 208 and the rotating shaft 205 are both located in the clearance area 2045 of the mounting plate 2044, so that when the driving member 2043 drives the mounting plate 2044 to move in the first direction, the support assembly 208 and the rotating shaft 205 will not be interfered, and the stability of the top cover protection plate 201 following the battery is ensured.

[0101] In some embodiments, as shown in FIG. 5, the support assembly 208 further comprises a bearing seat arranged on the fixed support 202, the bearing seat comprises a support and a bearing arranged on the support. A bushing is sleeved on the rotating shaft 205, and the rotating shaft 205 is arranged on the bearing in the bearing seat through the bushing, so as to realize the rotary connection of the rotating shaft 205 relative to the bearing seat, and ensure the stability of the top cover protection plate 201 following the top cover 100.

[0102] In order to ensure the balance of the positioning and the assembly to the top cover 100 and the top cover protection plate 201, as shown in FIG. 5, in some embodiments, the mounting block 2047 is configured as two, and the two mounting blocks 2047 are located on both sides of the clearance area 2045 along the second direction respectively; the positioning assembly 206 is configured as two, and each positioning assembly 206 is arranged symmetrically along the center line of the top cover protection plate 201 along the second direction.

[0103] It can be understood that the mounting block 2047 is symmetrically arranged relative to the top cover protection plate 201, and a set of positioning members 2062 is arranged on each mounting block 2047, which improves the positioning accuracy of the positioning assembly 206 to the installation of the top cover 100 and the top cover protection plate 201. At the same time, the symmetrically arranged positioning assembly 206 ensures that the top cover protection plate 201 can maintain an ideal geometric shape when being limited to the top cover 100, avoids deformation or deviation of the top cover protection plate 201 due to uneven stress, and ensures the stability of the top cover protection plate 201 following the top cover 100.

[0104] In addition, each mounting block 2047 is also provided with a sensor 203, so that the two sensors 203 symmetrically relative to the center line of the top cover protection plate 201 can accurately obtain the flatness of the top cover 100.

[0105] To further ensure the symmetry of the two positioning assemblies 206, in some embodiments, the mounting plate 2044 further comprises a limiting slot 2046, and the slot of the limiting slot 2046 is communicated with the clearance 2045.

[0106] In the height direction of the top cover welding device 01, the limiting slot 2046 can extend in the first direction, and the slot of the limiting slot 2046 is communicated with the clearance 2045. The limiting slot 2046 can be located in the central region of the mounting plate 2044 in the second direction.

[0107] In the first direction, the limiting slot 2046 corresponds to the support assembly 208. In this way, when the driving member 2043 drives the mounting plate 2044 to slide in the first direction, at least part of the support assembly 208 is inserted into the limiting slot 2046.

[0108] It can be understood that the limiting slot 2046 is located in the center of the mounting plate 2044, and when the limiting slot 2046 is inserted into the support assembly 208, the limiting slot 2046 can regulate the support assembly 208 in the second direction to a certain extent, so as to ensure that the axis of the rotating shaft 205 and the rotation center of the top cover protection plate 201 are located on the center line of the mounting plate 2044 in the second direction. In this way, the symmetry of the two sliders relative to the rotation center of the top cover protection plate 201 can be further ensured, so as to ensure the symmetry of the two positioning assemblies 206 relative to the rotation center.

[0109] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, and not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A top cover welding device, comprising: a battery driving mechanism for clamping and rotating a battery, the battery comprising a first end face and a second end face opposite to each other in a first direction, and a top cover pre-fixed on the first end face; a follow-up positioning mechanism arranged in the first direction apart from the battery driving mechanism, the follow-up positioning mechanism comprising a fixed support and a top cover protection plate rotationally connected with the fixed support, the top cover protection plate abutting against the top cover and rotating synchronously with the top cover, the follow-up positioning mechanism further comprising at least two sensors arranged on the fixed support, the sensors being used to acquire position information of different positions of the top cover. 2.The top cover welding device according to claim 1, wherein: the sensors are contact sensors; the follow-up positioning mechanism further comprises a pushing assembly arranged on the fixed support, a movable end of the pushing assembly being connected with the sensors, the pushing assembly being capable of pushing the sensors to reciprocate in the first direction to abut against or separate from the top cover. 3.The top cover welding device according to claim 2, wherein: the top cover protection plate is provided with a first avoiding groove for avoiding at least part of the sensors, when the pushing assembly pushes the sensors to move in the first direction, the sensors extend into the first avoiding groove to abut against the top cover. 4.The top cover welding device according to any one of claims 1 to 3, wherein: the at least two sensors are respectively located on two sides of the top cover protection plate in a second direction, the second direction being perpendicular to the first direction. 5.The top cover welding device according to any one of claims 1 to 4, wherein: the top cover protection plate is connected with the fixed support through a rotating shaft, the top cover protection plate being flexibly connected with the rotating shaft; the follow-up positioning mechanism further comprises a positioning assembly arranged on the pushing assembly; when the pushing assembly pushes the sensors to abut against the top cover in the first direction, the pushing assembly is capable of simultaneously pushing the positioning assembly to abut against the top cover protection plate and the top cover to position the top cover protection plate and the top cover in the first direction.

6. The roof welding apparatus of claim 5, wherein, the pushing assembly comprises: a linear slide rail arranged on the fixed support, the linear slide rail extending in the first direction; a mounting member movably arranged on the linear slide rail, the sensors and the positioning assembly being arranged on the mounting member; a driving member arranged on the fixed support, a driving end of the driving member being connected with the mounting member.

7. The roof welding apparatus of claim 6, wherein, the follow-up positioning mechanism further comprises: a limiting member arranged on the fixed support, the limiting member being capable of abutting against the mounting member to limit a movement stroke of the mounting member in the first direction.

8. The roof welding apparatus of claim 6 or 7, wherein, the positioning assembly comprises: a top cover end face positioning plate arranged on the mounting member, the top cover end face positioning plate being used to abut against an end face of the top cover; a positioning member arranged on the mounting member, the positioning member being capable of abutting against a side of the top cover protection plate away from the top cover. The detection end of the sensor is positioned closer to the battery driving mechanism than the end face positioning plate of the top cover along the first direction; and the end face positioning plate of the top cover and the positioning member avoid each other along a second direction perpendicular to the first direction.

9. The top cover welding device of claim 8, wherein, The end face positioning plate of the top cover is formed with a second avoiding groove at an end close to the top cover protection plate, and at least part of the sensor is located in the second avoiding groove.

10. The roof welding apparatus of claim 8 or 9, wherein, The top cover protection plate comprises: A body portion for abutting against the top cover; A connecting portion rotationally connected with the rotating shaft, the connecting portion is connected with the body portion, and a positioning groove is arranged on a side of the connecting portion away from the body portion, and the positioning member moves along a first direction and is inserted into the positioning groove.

11. The roof welding apparatus of claim 10, wherein, The top cover protection plate further comprises: A connecting member, one end of the connecting member is connected to the body portion, the other end of the connecting member passes through the connecting portion and is movably connected with the connecting portion, and the body portion and the connecting portion have a movement gap therebetween; An elastic member located between the body portion and the connecting portion.

12. The top cover welding device of any one of claims 6 to 11, wherein, The mounting member comprises a mounting plate slidably connected with the linear slide rail, and a mounting block arranged on the mounting plate; The sensor and the positioning assembly are arranged on the mounting block, and the mounting block is located on a side of the mounting plate close to the battery driving mechanism.

13. The top cover welding device of claim 12, wherein, The driving end of the driving member is arranged on the mounting plate, and the mounting plate is arranged with an avoiding area communicated with a side surface of the mounting plate facing the battery driving mechanism; The follow-up positioning mechanism further comprises a supporting assembly connected with the rotating shaft, the supporting assembly is arranged on the fixed support and located in the avoiding area, and in the case that the driving member drives the mounting plate to slide along the first direction, the mounting plate avoids the supporting assembly.

14. The top cover welding device of claim 13, wherein, The mounting block is configured as two, and the two mounting blocks are respectively located on two sides of the avoiding area along a second direction; The positioning assembly is configured as two, and each positioning assembly is arranged symmetrically along a center line of the top cover protection plate along the second direction.

15. The top cover welding device of claim 13 or 14, wherein, The mounting plate further comprises a limiting groove, and a groove opening of the limiting groove is communicated with the avoiding area; Along the first direction, the limiting groove corresponds to the supporting assembly, and in the case that the driving member drives the mounting plate to slide along the first direction, at least part of the supporting assembly is inserted into the limiting groove.

Images