Top cover welding device

Abstract

The utility model discloses a top cover welding device which comprises a battery driving mechanism used for clamping a battery and driving the battery to rotate, the battery comprises a first end face and a second end face which are opposite in the first direction, and a top cover is pre-fixed to the first end face; the follow-up positioning mechanism and the battery driving mechanism are arranged in a spaced mode in the first direction, the follow-up positioning mechanism comprises a fixing support and a top cover protection plate rotationally connected with the fixing support, the top cover protection plate abuts against the top cover and synchronously rotates with the top cover, the follow-up positioning mechanism further comprises a sensor, the sensor is arranged on the fixing support, and the sensor is arranged on the fixing support. The sensor is used for acquiring position information of different positions of the top cover. The sensor is arranged in the follow-up positioning mechanism and can obtain the position information of the top cover, so that the top cover welding device can adjust the welding parameters of the welding mechanism according to the position information, and the yield of welding the top cover on the battery is further improved.

Description

Technical Field

[0001] This application relates to the technical field of battery processing, and particularly to a top cover welding device. Background Art

[0002] During the production process of a battery, there is a process of welding a top cover to the end face of the battery. In related technologies, a battery clamping tooling is usually used to position the battery and drive the battery and a pre-fixed top cover to rotate. In order to prevent the pole column and the liquid injection port on the top cover from being contaminated during the welding process, it is necessary to use a top cover protection plate to shield the top cover during the welding process, and this requires the top cover protection plate to rotate synchronously with the top cover.

[0003] For this reason, two servo systems need to be configured in the top cover welding device. One is used to drive the battery to rotate, and the other is used to drive the top cover protection plate to rotate to ensure that the top cover protection plate can always shield the top cover during the process of welding the top cover. However, it is difficult to ensure absolute synchronization of the two servo systems, and the installation bases of the two servo systems are also different. In addition, 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 top cover welding. Utility Model Content

[0004] The embodiments of this application disclose a top cover welding device, which can detect the position of the top cover during the process of welding the top cover and adjust the welding scheme according to the detection result, thereby improving the yield of top cover welding.

[0005] To achieve the above object, in a first aspect, the embodiments of this application disclose a top cover welding device, including: a battery driving mechanism, which is used to clamp the battery and drive the battery to rotate. The battery includes a first end face and a second end face opposite to each other in a first direction, and a top cover is pre-fixed on the first end face; a follow-up positioning mechanism, which is arranged at an interval with the battery driving mechanism in the first direction. The follow-up positioning mechanism includes a fixed bracket and a top cover protection plate rotatably connected to the fixed bracket. The top cover protection plate abuts against the top cover and rotates synchronously with the top cover. The follow-up positioning mechanism further includes at least two sensors, and the at least two sensors are arranged on the fixed bracket. The sensors are used to obtain the position information of different positions of the top cover.

[0006] In a possible implementation manner, the sensor is a contact sensor; the follow-up positioning mechanism further includes a pushing component arranged on the fixed bracket. The movable end of the pushing component is connected to the sensor, and the pushing component can push the sensor to reciprocate in the first direction to abut against the top cover or separate from the top cover.

[0007] In a possible implementation, a first avoidance groove is provided on the top cover protection plate. The first avoidance groove is used to avoid at least part of the sensor. When the pushing component pushes the sensor to move in the first direction, the sensor extends into the first avoidance groove to abut against the top cover.

[0008] In a possible implementation, at least two sensors are respectively located on both sides of the top cover protection plate along the second direction, and the second direction is perpendicular to the first direction.

[0009] In a possible implementation, the top cover protection plate is connected to the fixed bracket through a rotating shaft, and the top cover protection plate is flexibly connected to the rotating shaft; the follow-up positioning mechanism further includes a positioning component, and the positioning component is arranged on the pushing component; when the pushing component pushes the sensor to abut against the top cover in the first direction, the pushing component can simultaneously push the positioning component to abut against the top cover protection plate and the top cover, so as to position the top cover protection plate and the top cover in the first direction.

[0010] In a possible implementation, the pushing component includes: a linear slide rail arranged on the fixed bracket, and the linear slide rail extends along the first direction; a mounting member movably arranged on the linear slide rail, and the sensor and the positioning component are arranged on the mounting member; a driving member arranged on the fixed bracket, and the driving end of the driving member is connected to the mounting member.

[0011] In a possible implementation, the follow-up positioning mechanism further includes: a limiting member arranged on the fixed bracket, and the limiting member can abut against the mounting member to limit the moving stroke of the mounting member along the first direction.

[0012] In a possible implementation, the positioning component includes: a top cover end face positioning plate arranged on the mounting member, and the top cover end face positioning plate is used to abut against the end face of the top cover; a positioning member arranged on the mounting member, and the positioning member can abut against the side of the top cover protection plate facing 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 face positioning plate; along the second direction, the top cover end face positioning plate and the positioning member avoid each other, and the second direction is perpendicular to the first direction.

[0013] In a possible implementation, a second avoidance groove is formed at the end of the top cover end face positioning plate close to the top cover protection plate, and at least part of the sensor is located in the second avoidance groove.

[0014] In a possible implementation, when the top cover end face positioning plate abuts against the top cover, along the second direction, the top cover end face positioning plate is located on one side of the top cover protection plate.

[0015] In a possible implementation, the top cover protection plate includes: a body part for abutting against the top cover; a connecting part rotatably connected to the rotating shaft, and a positioning groove is arranged on the side of the connecting part facing away from the body part, and the positioning member can move along the first direction and insert into the positioning groove.

[0016] In a possible implementation, the top cover protection plate also includes: a connecting piece, one end of which is connected to the main body, the other end of which is passed through the connecting part and movably connected to the connecting part, and a movable gap is provided between the main body and the connecting part; and an elastic piece, which is located between the main body and the connecting part.

[0017] In one possible implementation, the mounting component includes a mounting plate slidably connected to the linear slide rail, and a mounting block disposed on the mounting plate; the sensor and the positioning assembly are respectively disposed on the mounting block, and the mounting block is located on a side of the mounting plate close to the battery drive mechanism.

[0018] In one possible implementation, the driving end of the driving member is arranged on a mounting plate, and the mounting plate is provided with a clearance area connected to the surface of the mounting plate facing the battery driving mechanism; the follow-up positioning mechanism also includes a support assembly connected to the rotating shaft, the support assembly is arranged on a fixed bracket and is located in the clearance area, and when the driving member drives the mounting plate to slide along the first direction, the mounting plate avoids the support assembly.

[0019] In a possible implementation, the support assembly further includes: a bearing seat, which is disposed on the fixed bracket; a bushing, which is sleeved on the rotating shaft, and the rotating shaft is disposed on the bearing seat through the bushing.

[0020] In a possible implementation, two mounting blocks are configured, and the two mounting blocks are respectively located on both sides of the air avoidance area along the second direction; two positioning components are configured, and each positioning component is symmetrically arranged along the center line of the top cover protection plate along the second direction.

[0021] In one possible implementation, the mounting plate also includes a limit groove, and the groove opening of the limit groove is connected to the air avoidance area; along the first direction, the limit groove corresponds to the support assembly, and when the driving member drives the mounting plate to slide along the first direction, at least part of the support assembly is inserted into the limit groove.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] The top cover welding device provided in the embodiment of the present application is provided with a top cover protection plate that can be driven to rotate by the battery in the follow-up positioning mechanism. During the welding process, the top cover protection plate protects the top cover, and the top cover protection plate and the battery rotate with high synchronization, thereby ensuring the welding effect between the top cover and the battery. At the same time, by configuring a sensor in the follow-up positioning mechanism, the sensor can obtain the position information of the top cover, so that the controller of the top cover welding device can adjust the welding parameters of the welding mechanism according to the position information, thereby further improving the yield rate of the top cover welding on the battery.

[0024] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings required for use in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0026] Figure 1 The front view of a top cover welding device provided for an embodiment of the present application;

[0027] Figure 2 The side view of a top cover welding device provided for an embodiment of the present application;

[0028] Figure 3 The top view of a top cover welding device provided for an embodiment of the present application;

[0029] Figure 4 The front view of a follow-up positioning mechanism in a top cover welding device provided for an embodiment of the present application;

[0030] Figure 5 The top view of a follow-up positioning mechanism in a top cover welding device provided for an embodiment of the present application;

[0031] Figure 6 The side view of a follow-up positioning mechanism in a top cover welding device provided for an embodiment of the present application;

[0032] Figure 7 The top view of a mounting plate in a top cover welding device provided for an embodiment of the present application;

[0033] Figure 8 The test view of a mounting plate in a top cover welding device provided for an embodiment of the present application.

[0034] Explanation of the reference numerals:

[0035] 100 - Top cover;

[0036] 01 - Top cover welding device;

[0037] 10 - Battery drive mechanism; 101 - Fixture 101;

[0038] 20 - Follow - up positioning mechanism; 201 - Top cover protection plate; 2011 - First avoidance groove; 2012 - Body part; 2013 - Connection part; 2014 - Connecting piece; 2015 - Elastic piece; 202 - Fixed bracket; 203 - Sensor; 2031 - Contact end 2031; 204 - Pushing component; 2041 - Linear slide rail; 2042 - Mounting member; 2043 - Driving part; 2044 - Mounting plate; 2045 - Clearance area; 2046 - Limiting groove; 2047 - Mounting block; 205 - Rotating shaft; 206 - Positioning component; 2061 - Top cover end face positioning plate; 2061a - Second avoidance groove; 2062 - Positioning piece; 207 - Limiting piece; 208 - Support component. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0040] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0041] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above - mentioned terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific situation.

[0042] In addition, the terms "installation", "setting", "provided with", "connection", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present application can be understood according to the specific situation.

[0043] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, components or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0044] Blade batteries usually have a flat and long appearance structure. At both ends of the blade battery along its length direction, top covers need to be welded. The top cover is provided with pole posts and liquid injection ports. The pole posts are used to conduct current between the battery and the external circuit, and the liquid injection ports are used to inject electrolyte into the battery. Since the pole posts need to conduct the external circuit and the liquid injection ports need to be sealed, 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 objects generated by the welding environment from contaminating and damaging the pole posts and the liquid injection ports.

[0045] Before full welding the top cover and the battery, the top cover and the end of the battery can be spot welded first for pre - fixing. 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 posts and the liquid injection ports during the welding process. Therefore, the rotational synchronism between the top - cover protection plate and the battery will directly affect the welding effect of the top cover.

[0046] In addition, the relative position of the top cover relative to the battery after pre - welding also has a great influence on the welding effect. If there is a deviation in the position of the top cover after spot welding, the welding scheme needs to be adjusted to correct the position of the top cover.

[0047] Based on the above, the present application 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, by configuring a sensor in the top - cover welding device to obtain the position information of the top cover after spot welding.

[0048] As Figures 1 to 3 shown, a structural schematic diagram of a top - cover welding device 01 is shown. The top - cover welding device 01 includes a battery driving mechanism 10. The battery driving mechanism 10 is used to clamp the battery and drive the battery to rotate. The battery includes a first end face and a second end face opposite to each other in a first direction. A top cover 100 is pre - fixed on the first end face.

[0049] The top - cover welding device 01 includes a battery driving mechanism 10. The battery driving mechanism 10 may include a fixture 101. The fixture 101 can position and clamp the battery. The battery driving mechanism 10 may also include a motor. The motor is connected to the fixture 101 and can drive the fixture 101 to rotate to drive the battery to rotate.

[0050] The battery extends along a first direction. The first direction is Figure 1 and Figure 3 the X direction shown, Figure 1 andFigure 3 The Z direction shown is the height direction of the top cover welding device 01. Figure 2 and Figure 3 The second direction, i.e., the Y direction, is also shown, and the second direction is perpendicular to the first direction.

[0051] Both ends of the battery in the first direction have a first end face and a second end face. A top cover 100 can be pre-fixed to the first end face and the second end face of the battery by spot welding. In the embodiment of the present application, the top cover welding device 01 takes the top cover 100 on the first end face of the battery as an example for description. 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 welding process of the top cover 100 on the first end face.

[0052] The top cover welding device 01 further includes a follow-up positioning mechanism 20. The follow-up positioning mechanism 20 is arranged at an interval from the battery driving mechanism 10 in the first direction, that is, the follow-up positioning mechanism 20 is located on one side of the first end face of the battery in the first direction.

[0053] The follow-up positioning mechanism 20 includes a top cover protection plate 201. The top cover protection plate 201 can be in close contact and cooperation with the top cover 100, so that the top cover protection plate 201 can rotate synchronously with the battery through friction.

[0054] As Figure 1 shown, the follow-up positioning mechanism 20 further includes a fixed bracket 202. The top cover protection plate 201 is rotatably connected to the fixed bracket 202. 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 rotate synchronously. Since the top cover protection plate 201 is rotatably connected to the fixed bracket 202 and the rotation driving source of the top cover protection plate 201 is the battery, the rotation of the top cover protection plate 201 and the rotation of the battery must have synchronism. Compared with the related technology of configuring a servo system for the top cover protection plate 201, the follow-up positioning mechanism 20 in the embodiment of the present application not only saves a servo system, but also ensures the synchronism of the rotation of the top cover protection plate 201 and the battery. Furthermore, during the welding process, the top cover protection plate 201 will not cause adverse effects such as friction and collision with the top cover 100.

[0055] The follow-up positioning mechanism 20 further includes a sensor 203. The sensor 203 is arranged on the fixed bracket 202. The sensor 203 is used to detect the position information of the top cover 100. This position information can indicate the welding state of the top cover 100 after spot welding to the battery, for example: 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 to the 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, angle information, etc. between the top cover 100 and a reference point (such as the sensor 203 itself).

[0056] Specifically, the number of sensors 203 can be at least two, so as to perform multi-point detection on the top cover 100. At least two sensors 203 obtain the position information of different area points of the top cover 100, and the flatness, skew or offset of the top cover 100 after spot welding can be judged more accurately by comparing the position information at each point.

[0057] Exemplarily, the detection ends of at least two sensors 203 are flush along the second direction and face the top cover 100. Each sensor 203 can obtain the distance information between the sensor and the top cover. Different sensors 203 are used to detect different areas of the top cover. If the distance information obtained by at least two sensors 203 is different, it indicates that the top cover 100 has unevenness, skew or offset.

[0058] Exemplarily, the detection ends of at least two sensors can also have a spacing along the first direction, and this spacing can be a fixed value. Combining the distance information obtained by each sensor with the spacing difference between the detection ends of the sensors along the first direction can also determine whether the top cover 100 has unevenness, skew or offset.

[0059] Optionally, the sensor 203 can be fixed on the fixed bracket 202. At this time, the sensor 203 can obtain the position information of the top cover 100 without contacting the top cover 100. The sensor 203 can be selected from an optoelectronic sensor 203, a vision sensor 203, an ultrasonic sensor 203, etc.

[0060] Optionally, the sensor 203 can also be movably arranged on the fixed bracket 202, and the position information of the top cover 100 is obtained by contacting the top cover 100. The sensor 203 can be selected from a tolerance position sensor 203, a displacement sensor 203, etc.

[0061] Further, a welding mechanism is also configured in the top cover welding device 01. The welding mechanism can perform welding along the circumferential direction of the first end face of the battery to perform full welding on the top cover 100 and the first end face of the battery. The welding mechanism is also connected to the controller. The controller can determine the welding parameters of the welding mechanism according to the position information of the top cover 100 obtained by the sensor 203, such as: welding angle, welding position, etc., so as to realize that the welding structure adjusts the welding plan according to the position of the top cover 100, and thus adjusts the welding state of the full welding of the top cover 100 to the battery.

[0062] Exemplarily, if the controller determines according to the position information fed back by the sensor 203 that the position offset of the top cover 100 after spot welding is relatively serious and the weld seam 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.

[0063] Thus, the top cover welding device 01 provided by the embodiments of the present application, by configuring a top cover protection plate 201 capable of being driven by a battery to rotate in the follow-up positioning mechanism 20, while the top cover protection plate 201 protects the top cover 100 during the welding process, the synchronization between the top cover protection plate 201 and the battery rotation is high, thereby ensuring the welding effect between the top cover 100 and the battery. At the same time, by configuring at least two sensors 203 in the follow-up positioning mechanism 20, the at least two sensors 203 can obtain the position information of the top cover 100, so that the controller of the top cover welding device 01 can determine the welding state of the top cover 100 through the position information and adjust the welding parameters of the welding mechanism, thereby further improving the yield rate of the top cover 100 welded on the battery.

[0064] 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 non-contact photoelectric sensors 203, vision sensors 203, etc., the detection accuracy of the contact sensor 203 is higher. More importantly, in the welding scenario, there are usually characteristics such as high temperature, dust, and spatter. The contact sensor 203 is more adaptable to the welding working conditions than photoelectric sensors 203 that require a clean working environment, etc., and can maintain the accuracy and reliability of detection.

[0065] As Figure 4 and Figure 5 As shown, the follow-up positioning mechanism 20 further includes a pushing component 204 disposed on the fixed bracket 202. The movable end of the pushing component 204 can be directly or indirectly connected to the sensor 203. The pushing component 204 can push the sensor 203 to reciprocate along the first direction to abut against the top cover 100 or separate from the top cover 100, so that the sensor 203 can complete the position detection of the top cover 100.

[0066] It can be understood that since the top cover 100 needs to maintain 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 component 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 make a slight displacement relative to the housing of the sensor 203 and is elastically connected to the working components inside the housing. The slight displacement of the contact end 2031 can enable the working components of the sensor 203 to perform detection to obtain the position information of the top cover 100. After the detection is completed, the pushing component 204 pulls the sensor 203 back to the initial position, and the controller of the top cover welding device 01 then controls the drive motor of the battery positioning mechanism to drive the fixture 101 to rotate to avoid interference between the sensor 203 and the top cover 100 and ensure the service life of the sensor 203.

[0067] In some embodiments, as Figure 6 shown, a first avoidance groove 2011 is provided on the top cover protection plate 201, and the first avoidance groove 2011 is used to avoid the sensor 203. Along the first direction, the first avoidance groove 2011 penetrates through the top cover protection plate 201. In this way, during the process that the pushing component 204 pushes the sensor 203 to approach the top cover 100 along the first direction, the contact end 2031 of the sensor 203 can penetrate out of the first avoidance groove 2011 and expose the top cover protection plate 201 to abut against the top cover 100.

[0068] The number of the first avoidance grooves 2011 is the same as the number of the sensors 203. When the follow-up positioning mechanism 20 is configured with a plurality of sensors 203, the first avoidance grooves 2011 are also configured to be multiple, and the first avoidance grooves 2011 are located on the moving path of the sensors 203 along the first direction.

[0069] In order to further detect the surface flatness 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, and the second direction is perpendicular to the first direction. For the convenience of description, at least two sensors 203 are taken as examples in the following embodiments for introduction.

[0070] As Figure 5 and Figure 6 shown, the two sensors 203 can be symmetrically arranged relative to the top cover protection plate 201 and are 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 mutually verified. If the position information obtained by the two sensors 203 is basically the same, it indicates that the flatness of the top cover 100 is good; if there are obvious differences in the position information obtained by the two sensors 203, there may be defects such as local unevenness, offset, and skew in the top cover 100 after spot welding. In the case of serious defects, it may be necessary to directly abandon the welding of the top cover 100.

[0071] In order to ensure the fitting degree between the top cover protection plate 201 and the top cover 100, in some embodiments, the top cover protection plate 201 is connected to the fixed bracket 202 through a rotating shaft 205, and the top cover protection plate 201 is flexibly connected to the rotating shaft 205.

[0072] The top cover protection plate 201 is connected to the rotating shaft 205, and the rotating shaft 205 is arranged on the fixed bracket 202. It can be understood that the fixed bracket 202 provides structural support for the top cover protection plate 201, and since the top cover protection plate 201 is connected to the rotating shaft 205, the top cover protection plate 201 is structurally allowed to rotate synchronously after being limitedly fitted with the top cover 100.

[0073] The top cover protection plate 201 is flexibly connected to the rotating shaft 205. In this way, the top cover protection plate 201 can perform position fine-tuning 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, enabling the top cover protection plate 201 to achieve adaptive cooperation when the top cover 100 is in different horizontal states.

[0074] As Figure 5 shown, the follow-up positioning mechanism 20 further includes a positioning component 206, and the positioning component 206 is arranged on the pushing component 204. When the pushing component 204 pushes the sensor 203 to abut against the top cover 100 in the first direction, the pushing component 204 can simultaneously push the positioning component 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.

[0075] It can be understood that since the top cover protection plate 201 is flexibly connected to the rotating shaft 205, the top cover protection plate 201 may not be able to form a tight fit with the top cover 100. For this reason, a positioning component 206 is configured in the follow-up positioning mechanism 20. The positioning component 206 is connected to the movable end of the pushing component 204. The pushing component 204 can push the positioning component 206 to move relative to the fixed bracket 202 in the first direction, so that at least part of the positioning component 206 abuts against the top cover protection plate 201. The positioning component 206 can apply a pressure in the first direction to the top cover protection plate 201, so that the top cover protection plate 201 presses the top cover 100. A mating groove is provided on the top cover protection plate 201 for accommodating the pole column on the top cover 100 to prevent the pole column from being contaminated during the welding process.

[0076] Furthermore, during the process of the pushing component 204 pushing the positioning component 206 to move in the first direction, the positioning component 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 component 206, it can be further ensured that the top cover protection plate 201 is pressed against the top cover 100.

[0077] It should be noted that by reasonably setting the positional relationship between the positioning component 206 and the sensor 203, it can be ensured that when the pushing component 204 pushes the sensor 203 to abut against and detect the position of the top cover 100, the positioning component 206 can also simultaneously push the positioning component 206 to abut against the top cover 100 and the top cover protection plate 201 at the same time. In this way, only one pushing operation of the pushing component 204 is required to simultaneously complete the operation of pressing the top cover protection plate 201 against the top cover 100 and the operation of the sensor 203 detecting the position of the top cover 100, improving the working efficiency of the top cover welding device 01.

[0078] In order to drive the sensor 203 and the positioning component 206 by the pushing component 204, in some embodiments, such as Figure 5 and Figure 6 shown, the pushing component 204 includes a linear slide rail 2041 disposed on the fixed bracket 202; a mounting member 2042, the mounting member 2042 is movably disposed on the linear slide rail 2041, and the sensor 203 and the positioning component 206 are disposed on the mounting member 2042; a driving member 2043 disposed on the fixed bracket 202, and the driving end of the driving member 2043 is connected to the mounting member 2042.

[0079] The mounting member 2042 is movably disposed 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. Both the sensor 203 and the positioning component 206 are disposed on the mounting member 2042, so the sensor 203 and the positioning component 206 can also always reciprocate along the first direction to ensure the movement consistency of the sensor 203 and the positioning component 206.

[0080] The driving member 2043 is disposed on the fixed bracket 202 and connected to the mounting member 2042, so as to be able to drive the mounting member 2042 and the sensor 203 and the positioning component 206 disposed 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, etc.

[0081] In order to ensure the consistency of the moving stroke of the sensor 203 and the positioning component 206 each time, in some embodiments, the follow-up positioning mechanism 20 further includes a limiting member 207 disposed on the fixed bracket 202, and the limiting member 207 can abut against the mounting member 2042 to limit the moving stroke of the mounting member 2042 along the first direction.

[0082] The limiting member 207 can be a limiting screw, and the limiting screw can be fixed on the fixed bracket 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 that the stroke of the mounting member 2042 pushed by the driving member 2043 each time is consistent.

[0083] By reasonably setting the fixing position of the limiting member 207, it can be ensured that when the mounting member 2042 and the limiting member 207 form a limit, the positioning component 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.

[0084] In some embodiments, such as Figure 5 and Figure 6As shown, the positioning component 206 includes a top cover end face positioning plate 2061, and the top cover end face positioning plate 2061 is disposed on the mounting member 2042. The top cover end face positioning plate 2061 is used to abut against the end face of the top cover 100.

[0085] It should be noted that although the top cover 100 is covered with a top cover protection plate 201 on the outside, the top cover protection plate 201 may not completely cover the top cover 100, and at least part of the surface of the top cover 100 may not be 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 that is not covered by the top cover protection plate 201 to position the top cover 100.

[0086] The positioning member 2062 is also disposed on the mounting member 2042. Since the positioning member 2062 is used to abut against the side of the top cover protection plate 201 facing away from the top cover 100, the positioning member 2062 can have a smaller volume to reduce the space occupied by the follow-up positioning mechanism 20, making the follow-up positioning mechanism 20 more compact. Optionally, the positioning member 2062 can be any one of a pin and a screw.

[0087] Along the first direction, the positioning surface of the top cover end face positioning plate 2061 is closer to the battery drive mechanism 10 than the positioning surface of the positioning member 2062, so as to ensure that under the push of the push component 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 facing away from the top cover 100.

[0088] Furthermore, the contact end 2031 of the sensor 203 is closer to the battery drive mechanism 10 than the top cover end face positioning plate 2061. When the push component 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 the other part of the sensor 203 (elastically connected to the contact end 2031) continue to move along 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 and the contact end 2031 is elastically connected to the working components in the sensor 203, the working components are triggered to output different detection data.

[0089] Furthermore, along the second direction, the top cover end face positioning plate 2061 and the positioning member 2062 avoid each other to ensure that the top cover end face positioning plate 2061 and the positioning member 2062 are staggered from each other along the second direction, so as to be able to abut against the part of the top cover 100 that is not covered by the top cover protection plate 201 and the top cover protection plate 201 respectively.

[0090] Since the space of the top cover 100 along the second direction is limited, the top cover end surface 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 top cover end surface positioning plate 2061 from interfering with the detection of the sensor 203, in some embodiments, the top cover end surface positioning plate 2061 is formed with a second avoidance groove 2061a at the end close to the top cover protection plate 201, and at least part of the sensor 203 is located in the second avoidance groove 2061a. In this way, the top cover end surface 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.

[0091] In order to achieve a flexible connection between the top cover protection plate 201 and the rotating shaft 205, in some embodiments, as Figure 5 As shown, the top cover protection plate 201 includes a main body 2012, and the main body 2012 is used to abut against the top cover 100. The main body 2012 can be constructed in a plate shape, and the matching groove and the first avoidance groove 2011 of the top cover protection plate 201 are both formed in the main body 2012. Optionally, in order to ensure the structural strength and protection performance of the main body 2012, the main body 2012 can be made of materials such as alloys and ceramics.

[0092] The top cover protection plate 201 further includes a connection portion 2013 located on a side of the main body 2012 away from the battery positioning mechanism. The connection portion 2013 is rotatably connected to the rotating shaft 205, and the connection portion 2013 is connected to the main body 2012, so that the main body 2012 can be finely adjusted relative to the fixed bracket 202. In this way, even if the spot welding states of different top covers 100 are different, it can be ensured that the main body 2012 can cooperate with the top covers 100 in different spot welding states.

[0093] The connection part 2013 may be provided with a positioning groove, and the positioning member 2062 can pass through the positioning groove of the connection part 2013 and abut against the groove bottom of the positioning groove. In this way, it can ensure that the main body 2012 has a fine adjustment space relative to the fixing bracket 202 to form a limited fit with the top cover 100 in different spot welding states, and the positioning member 2062 can position the main body 2012 to ensure that the main body 2012 is pressed tightly against the top cover 100.

[0094] In some embodiments, the top cover protection plate 201 further includes a connecting member 2014, and a first end of the connecting member 2014 is fixedly connected to the main body 2012. A through hole is further provided on the connecting portion 2013, and a second end of the connecting portion 2013 is passed through the through hole, and a limiting portion is formed at the second end of the connecting portion 2013, and the cross-sectional area of ​​the limiting portion is larger than the cross-sectional area of ​​the through hole, so as to prevent the connecting member 2014 from falling out of the connecting portion 2013.

[0095] Further, the length of the connecting member 2014 can be greater than the thickness of the connecting portion 2013, so that a certain movement gap can be formed between the main body portion 2012 and the connecting portion 2013, and this movement gap can allow the main body portion 2012 to finely adjust its position relative to the fixed bracket 202.

[0096] In some embodiments, the top cover protection plate 201 further includes an elastic member 2015. The elastic member 2015 can be located within the movement gap between the main body portion 2012 and the connecting portion 2013. The elastic member 2015 can buffer the buffering force when the main body portion 2012 presses against the top cover 100. At the same time, the deformation force of the elastic member 2015 can further ensure that the main body portion 2012 presses against the top cover 100.

[0097] In order to realize the support of the installation member 2042 for the positioning assembly 206 and the sensor 203, in some embodiments, as Figure 5 shown, the installation member 2042 includes a mounting plate 2044 slidably connected to the linear slide rail 2041, and a mounting block 2047 provided on the mounting plate 2044. The sensor 203 and the positioning assembly 206 are respectively arranged 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.

[0098] The mounting plate 2044 and the mounting block 2047 of the linear slide rail 2041 are arranged on the mounting plate 2044, which is used to improve the installation reference of the sensor 203 and the positioning assembly 206, so as to ensure that the heights of the sensor 203 and the positioning assembly 206 can abut against the top cover 100 and the top cover protection plate 201.

[0099] The mounting block 2047 is located on the side of the mounting plate 2044 close to the battery driving mechanism 10, which can also further reduce the pushing stroke of the pushing assembly 204, thereby improving the working rhythm of the top cover welding device 01.

[0100] The driving end of the driving member 2043 is arranged on the mounting plate 2044. In order to prevent the mounting plate 2044 from interfering with the top cover protection plate 201 when moving in the first direction, in some embodiments, as Figure 7 and Figure 8 shown, the mounting plate 2044 is provided with a clearance area 2045 communicating with the surface of the mounting plate 2044 facing the battery driving mechanism 10.

[0101] The clearance area 2045 can be arranged in the middle of the mounting plate 2044. The clearance area 2045 communicates with the side of the mounting plate 2044 facing the battery end face positioning mechanism, so that the mounting plate 2044 has a U-shaped structure.

[0102] Furthermore, the follow-up positioning mechanism 20 also includes a support assembly 208 connected to the rotating shaft 205. The support assembly 208 is arranged on the fixed bracket 202 and is located in the avoidance area 2045. When the driving member 2043 drives the mounting plate 2044 to slide along the first direction, the mounting plate 2044 avoids the support assembly 208.

[0103] The support assembly 208 is disposed on the fixed bracket 202, and the support assembly 208 is used to provide 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 avoidance area 2045 of the mounting plate 2044, so that when the driving member 2043 drives the mounting plate 2044 to move along the first direction, there will be no interference with the support assembly 208 and the rotating shaft 205, ensuring that the top cover protection plate 201 stably follows the battery.

[0104] In some embodiments, Figure 5 As shown, the support assembly 208 also includes a bearing seat, which is placed on the fixed bracket 202. The bearing seat includes a support and a bearing, and the bearing is arranged on the support. The 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 rotation connection of the rotating shaft 205 relative to the bearing seat, thereby ensuring the stability of the top cover protection plate 201 following the top cover 100.

[0105] In order to ensure the balance of positioning and assembly of the top cover 100 and the top cover protection plate 201, as Figure 5 As shown, in some embodiments, the mounting block 2047 is configured as two, and the two mounting blocks 2047 are respectively located on both sides of the air avoidance area 2045 along the second direction; the positioning components 206 are configured as two, and each positioning component 206 is symmetrically arranged along the center line of the top cover protection plate 201 along the second direction.

[0106] It can be understood that the mounting blocks 2047 are arranged symmetrically with respect to the top cover protection plate 201, and a set of positioning members 2062 are arranged on each mounting block 2047, which improves the positioning accuracy of the positioning assembly 206 for 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 it is limited to the top cover 100, avoids deformation or offset of the top cover protection plate 201 due to uneven force on the top cover protection plate 201, and ensures the stability of the top cover protection plate 201 following the top cover 100.

[0107] In addition, each mounting block 2047 is also configured with a sensor 203 to ensure that the two sensors 203 symmetrical with respect to the center line of the top cover protection plate 201 can accurately obtain the flatness of the top cover 100 .

[0108] In order to further ensure the symmetry of the two sets of positioning components 206, in some embodiments, the mounting plate 2044 further includes a limiting groove 2046, and the notch of the limiting groove 2046 communicates with the clearance area 2045.

[0109] Along the height direction of the top cover welding device 01, the limiting groove 2046 can extend along a first direction, and the notch of the limiting groove 2046 communicates with the clearance area 2045. The limiting groove 2046 can be located in the central area of the mounting plate 2044 along a second direction.

[0110] Along the first direction, the limiting groove 2046 corresponds to the support component 208. In this way, when the driving member 2043 drives the mounting plate 2044 to slide along the first direction, at least a part of the support component 208 is inserted into the limiting groove 2046.

[0111] It can be understood that the limiting groove 2046 is located at the center of the mounting plate 2044. When the limiting groove 2046 is inserted and matched with the support component 208, the limiting groove 2046 can regularize the support component 208 along the second direction 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 along 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, thereby ensuring the symmetry of the two positioning components 206 relative to the rotation center.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some 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 application.

Claims

1. A top cover welding device, characterized in that, include: 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 to each other along a first direction, and a top cover is pre-fixed on the first end face; A follow-up positioning mechanism, wherein the follow-up positioning mechanism and the battery drive mechanism are spaced apart along the first direction, wherein the follow-up positioning mechanism comprises a fixed bracket and a top cover protection plate rotatably connected to the fixed bracket, wherein the top cover protection plate abuts against the top cover and rotates synchronously with the top cover, and wherein the follow-up positioning mechanism further comprises at least two sensors, wherein the sensors are arranged on the fixed bracket, and at least two of the sensors are used to obtain position information of different positions of the top cover.

2. The top cover welding device according to claim 1, characterized in that: The sensor is a contact sensor; The follow-up positioning mechanism also includes a pushing component arranged on the fixed bracket, the movable end of the pushing component is connected to the sensor, and the pushing component can push the sensor to move back and forth along a first direction to abut against the top cover or separate from the top cover.

3. The top cover welding device according to claim 2, characterized in that: The top cover protection plate is provided with a first avoidance groove, and the first avoidance groove is used to avoid at least a part of the sensor. When the pushing component pushes the sensor to move along a first direction, the sensor extends into the first avoidance groove to abut against the top cover.

4. The top cover welding device according to claim 2, characterized in that: At least two of the 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.

5. The top cover welding device according to any one of claims 2 to 4, characterized in that: The top cover protection plate is connected to the fixed bracket via a rotating shaft, and the top cover protection plate is flexibly connected to the rotating shaft; The follow-up positioning mechanism further includes a positioning component, and the positioning component is arranged on the pushing component; When the pushing component pushes the sensor to abut against the top cover along a first direction, the pushing component can simultaneously push the positioning component 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.

6. The top cover welding device according to claim 5, characterized in that, The pushing component comprises: A linear slide rail is arranged on the fixed bracket, and the linear slide rail extends along a first direction; A mounting component, wherein the mounting component is movably disposed on the linear slide rail, and the sensor and the positioning assembly are disposed on the mounting component; A driving member is arranged on the fixing bracket, and a driving end of the driving member is connected to the mounting component.

7. The top cover welding device according to claim 6, characterized in that, The follow-up positioning mechanism also includes: A limiting member is arranged on the fixing bracket, and the limiting member can abut against the mounting component to limit the movement stroke of the mounting component along the first direction.

8. The top cover welding device according to claim 6, characterized in that, The positioning component comprises: A top cover end surface positioning plate, arranged on the mounting member, the top cover end surface positioning plate being used to abut against the end surface 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; Among them, along the first direction, the detection end of the sensor is closer to the battery drive 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.

9. The top cover welding device according to claim 8, characterized in that: A second avoidance groove is formed at the end of the top cover end surface positioning plate close to the top cover protection plate, and at least part of the sensor is located in the second avoidance groove.

10. The top cover welding device according to claim 8, characterized in that, The top cover protection plate comprises: A main body portion, the main body portion being used to abut against the top cover; The connecting part is rotatably connected to the rotating shaft, the connecting part is connected to the main body, a positioning groove is arranged on the side of the connecting part away from the main body, and the positioning member moves along the first direction and is inserted into the positioning groove.

11. The top cover welding device according to claim 10, characterized in that, The top cover protection plate also includes: A connecting member, one end of which is connected to the main body, the other end of which is passed through the connecting portion and movably connected to the connecting portion, and a movable gap is provided between the main body and the connecting portion; The elastic member is located between the main body and the connecting portion.

12. The top cover welding device according to claim 8, characterized in that: The mounting member comprises a mounting plate slidably connected to the linear slide rail, and a mounting block arranged on the mounting plate; The sensor and the positioning assembly are respectively 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 according to claim 12, characterized in that: The driving end of the driving member is arranged on the mounting plate, and the mounting plate is provided with a clearance area connected to a surface of the mounting plate on one side facing the battery driving mechanism; The follow-up positioning mechanism also includes a support assembly connected to the rotating shaft, the support assembly is arranged on the fixed bracket and located in the avoidance area, and when the driving member drives the mounting plate to slide along the first direction, the mounting plate avoids the support assembly.

14. The top cover welding device according to claim 13, characterized in that: The number of the mounting blocks is two, and the two mounting blocks are respectively located on two sides of the air avoidance area along the second direction; The positioning components are configured in two, and each positioning component is symmetrically arranged along the center line of the top cover protection plate along the second direction.

15. The top cover welding device according to claim 14, characterized in that: The mounting plate further comprises a limiting groove, the notch of which is connected to the air avoidance area; Along the first direction, the limiting groove corresponds to the supporting assembly, and when the driving member drives the mounting plate to slide along the first direction, at least a portion of the supporting assembly is inserted into the limiting groove.

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