Top cover pre-spot welding device and battery cell shell equipment

Abstract

The present invention discloses a top cover pre-spot welding device and a battery cell shell insertion device. The top cover pre-spot welding device includes: a base and a welding assembly, the base is defined with a work station for accommodating batteries, and the welding assembly includes at least one first spot welding part, at least three second spot welding parts, at least one third spot welding part, and multiple fourth spot welding parts; wherein, at least one first spot welding part is fixedly connected to the base, two of the second spot welding parts are fixedly connected to the base, and the remaining second spot welding parts can all be moved relative to the base in the width direction of the battery, the third spot welding part can be moved relative to the base in the length direction to abut the first spot welding part in the length direction of the battery, and each fourth spot welding part can be moved relative to the base in the width direction of the battery to abut the second spot welding parts in the width direction. The top cover pre-spot welding device of the present invention can ensure the accuracy of the position of each pre-spot welding and ensure the normal progress of subsequent welding.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a top cover pre-spot welding device and a battery core shell insertion device. Background Art

[0002] With the development of science and technology, the application of secondary batteries is becoming more and more extensive. Square batteries account for a large proportion of secondary batteries. During the production process of square batteries, the battery cells need to be placed in the battery shell, and then the top cover is welded to the shell. During the welding process of the top cover, the top cover needs to be pre-spot welded first, the top cover needs to be positioned on the shell, and then a complete welding is performed along the connection between the top cover and the shell. The top cover is connected to the shell before the battery can be used normally.

[0003] In the prior art, pre-spot welding is generally a right-angle positioning method, that is, the battery is placed on a workbench, positioned by two mutually perpendicular sides, and then the battery is pressed against the other two opposite sides to fix the battery, and then pre-spot welding is performed. However, the battery shell may be deformed during the processing and shell insertion process. After the shell is deformed, it is impossible to accurately pre-spot weld the deformed part, and the welding point may shift. It cannot be guaranteed that the pre-spot welding can be welded to the connection between the shell and the top cover. It may be welded to the shell or the battery cell, affecting subsequent operations. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a top cover pre-spot welding device that can ensure the precise position of each pre-spot welding and ensure the normal progress of subsequent welding.

[0005] The present invention also provides a battery cell shell insertion device using the top cover pre-spot welding device.

[0006] The top cover pre-spot welding device according to the first embodiment of the present invention includes:

[0007] a base, the base defining a station for accommodating the battery, the station having a first side and a second side perpendicular to each other, a third side spaced apart from the first side, and a fourth side spaced apart from the second side;

[0008] A welding assembly comprising at least one first spot welder disposed on the first side, at least three second spot welders, each of which is spaced apart along the length of the battery on the second side, at least one third spot welder disposed on the third side, and a plurality of fourth spot welders, each of which is spaced apart along the length of the battery on the fourth side;

[0009] Among them, at least one of the first spot welding parts is fixedly connected to the base, two of the second spot welding parts are fixedly connected to the base, and the remaining second spot welding parts are all movable relative to the base in the width direction of the battery, the third spot welding part is movable relative to the base in the length direction to support the battery, so that the battery abuts the first spot welding part in the length direction, and each of the fourth spot welding parts is movable relative to the base in the width direction of the battery to support the battery, so that the battery abuts each of the second spot welding parts in the width direction.

[0010] The top cover pre-spot welding device according to the embodiment of the present invention has at least the following beneficial effects:

[0011] During the pre-spot welding process of the battery, the top cover is pressed against the shell in which the battery cell has been placed, and pre-spot welding is performed at multiple positions at the connection between the shell and the top cover. The top cover is connected to the shell to ensure that the top cover will not fall off and is positioned to ensure that subsequent processes can proceed normally. During pre-spot welding, at least one first spot weld on the first side is fixedly connected to the base, and two of the second spot welds on the second side are fixedly connected to the base. The remaining second spot welds can be moved to adapt to the deformation of the shell. The battery is pressed tightly by the third and fourth spot welds to ensure that each spot weld can accurately abut against the connection between the shell and the top cover. The welding position of each spot weld is accurate to ensure that subsequent processes can proceed smoothly, thereby improving the battery yield after molding.

[0012] In other embodiments of the present invention, the top cover pre-spot welding device also includes a plurality of driving members, each of which is respectively connected to each of the fourth spot welding members and the third spot welding members to individually drive each of the fourth spot welding members to move along the width direction and support the battery, and individually drive the third driving member to move along the length direction and support the battery.

[0013] In other embodiments of the present invention, among the second spot welds, two of the second spot welds at both ends in the longitudinal direction are fixedly connected to the base.

[0014] In other embodiments of the present invention, the top cover pre-spot welding device also includes an elastic member, defining a second spot welding member fixedly connected to the base as a second fixed spot welding member, and the second spot welding member movable relative to the base as a second movable spot welding member, and each of the elastic members is arranged between the second movable spot welding member and the base to apply a force to move the second movable spot welding member and the base away from each other.

[0015] In other embodiments of the present invention, the number of the first spot welds and the third spot welds is the same, the number of the second spot welds and the fourth spot welds is the same, and each of the first spot welds and each of the third spot welds are arranged relative to each other in the length direction, and each of the second spot welds and each of the fourth spot welds are arranged relative to each other in the width direction.

[0016] In other embodiments of the present invention, the top cover pre-spot welding device further includes a reset mechanism, which is configured to move the battery along the direction from the first side toward the third side and along the direction from the second side toward the fourth side to move the battery to an initial position.

[0017] In other embodiments of the present invention, the reset mechanism includes a first reset cylinder and a second reset cylinder;

[0018] The first reset cylinder can drive the welding assembly to move along the first side toward the third side, and the second reset cylinder can drive the welding assembly to move along the second side toward the fourth side, so as to move the battery to the initial position.

[0019] In other embodiments of the present invention, the top cover pre-spot welding device also includes a clamp, which is arranged on one side of the base and can move relative to the base. The clamp also has a locking mechanism, which can support the top cover to limit the relative movement between the top cover and the shell, so that the battery can maintain a set posture and enter the work station.

[0020] In other embodiments of the present invention, the base further includes an avoidance groove, and the avoidance groove corresponds to the clamping claw to accommodate the clamping claw to clamp the battery and enter the work station.

[0021] A battery cell shell insertion device according to a second embodiment of the present invention includes:

[0022] The above-mentioned top cover pre-spot welding device.

[0023] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1 Schematic diagram of a top cover pre-spot welding device according to an embodiment of one aspect of the present invention;

[0026] Figure 2 This is a front view of a top cover pre-spot welding device according to an embodiment of one aspect of the present invention;

[0027] Figure 3 A top view of a top cover pre-spot welding device according to an embodiment of one aspect of the present invention;

[0028] Figure 4 A top view of a workstation in a top cover pre-spot welding device according to an embodiment of one aspect of the present invention;

[0029] Figure 5 for Figure 5 A magnified schematic diagram of point A in the middle;

[0030] Figure 6 This is an exploded schematic diagram of a workstation in an embodiment of one aspect of the present invention.

[0031] Reference numerals:

[0032] Base 100 , first side 110 , first spot weld 111 , second side 120 , second spot weld 121 , third side 130 , third spot weld 131 , fourth side 140 , fourth spot weld 141 , avoidance groove 150 ;

[0033] Driving member 200;

[0034] elastic member 300;

[0035] Reset mechanism 400;

[0036] Gripper 500. DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0039] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] The present invention proposes a top cover pre-spot welding device that can ensure the accuracy of the pre-spot welding position to improve the yield rate of the battery. In order to achieve the above purpose, the top cover pre-spot welding device proposed by the present invention includes a base and a plurality of spot welding parts. The base is defined with a rectangular work station. There are a plurality of spot welding parts on the four sides of the work station, wherein at least one first spot welding part on the first side and two spot welding parts on the second side are fixed, and the remaining second spot welding parts can be moved relative to the base. The third spot welding part on the third side and the fourth spot welding part on the fourth side can both be moved relative to the base to press the battery tightly, thereby ensuring that the welding position of each spot welding part is correct. The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0043] In some embodiments, reference Figures 1 to 6 The top cover pre-spot welding device includes a base 100 and a welding assembly. At least one workstation is defined on the base 100 (two workstations are provided in the illustrated embodiment). The workstation is used to accommodate battery processing. The workstation includes four sides, which are connected end to end to jointly define a rectangular workstation. For the convenience of description, we define them as a first side 110, a second side 120, a third side 130 and a fourth side 140, respectively. The first side 110 and the second side 120 are perpendicular to each other, the third side 130 and the first side 110 are spaced apart relative to each other and are perpendicular to the second side 120, and the fourth side 140 and the second side 120 are spaced apart relative to each other and are perpendicular to the first side 110 and the third side 130.

[0044] On the first side 110, at least one first spot welder 111 is provided (in the illustrated embodiment, there is one first spot welder 111, but not limited thereto) to correspond to the short side of the battery case, and at least three second spot welders 121 are provided on the second side 120 (in the illustrated embodiment, there are six second spot welders 121, but not limited thereto), and each second spot welder 121 is spaced apart along the length direction of the battery to correspond to the long side of the battery case. At least one third spot welder 131 is also provided on the third side 130 (in the illustrated embodiment, there is one third spot welder 131, but not limited thereto), and a plurality of fourth spot welders 141 are also provided on the fourth side 140 (in the illustrated embodiment, there are six fourth spot welders 141, but not limited thereto), and each fourth spot welder 141 is spaced apart along the length direction of the battery. That is, there are a total of multiple spot welding parts (a total of 14 in the illustrated embodiment) on the circumference of the battery shell, so that in the process of pre-spot welding between the battery shell and the top cover, there are multiple welding points, which can better position and fix the top cover on the shell, ensuring that subsequent comprehensive welding can be better carried out.

[0045] And among the multiple spot welds, at least one spot weld is fixedly connected to the base 100, two of the second spot welds 121 are fixedly connected to the base 100, and the remaining second spot welds 121 can move in the battery width direction relative to the base 100 to adapt to the deformation of the battery shell, that is, even if the long side of the battery shell corresponding to the second side 120 is deformed, during the positioning process of the battery, each second spot weld 121 can accurately abut the connection between the battery shell and the top cover, thereby ensuring the accuracy of the welding position, and at the same time, the third spot weld 131 can move along the length direction of the battery to abut the battery, so that the battery abuts against the first spot weld 111 in the length direction, and each fourth spot weld 141 can also move along the length direction of the battery to abut the battery, so that the battery abuts against the first spot weld 111 in the length direction, and each fourth spot weld 141 can also move along the length direction of the battery to abut the battery. The battery is moved in the width direction to abut the battery so that the battery abuts against each second spot welder 121 in the width direction. During the pre-spot welding process of the battery, the battery is placed in the work station, and then the third spot welder 131 and the fourth spot welder 141 are moved in two directions to move the battery to abut the first spot welder 111 and the second spot welder 121, so as to position the battery. In the circumferential direction of the battery, each spot welder accurately abuts the battery shell, and then pre-spot welding is performed to ensure that the welding point is the connection between the shell and the top cover, thereby avoiding damage to the battery cell by the welding laser, and the top cover can also be fixed on the shell. The welding position of each spot welder is accurate, which can ensure that the subsequent process can proceed smoothly, thereby improving the yield rate of the battery after forming.

[0046] In some embodiments, reference Figures 1 to 6The top cover pre-spot welding device further includes a plurality of driving members 200 (the form of the driving member 200 is not limited, and the driving member 200 in the illustrated embodiment is a cylinder), each driving member 200 is respectively connected to each third spot welding member 131 and the fourth spot welding member 141 to independently drive the movement of each third spot welding member 131 and the fourth spot welding member 141, so as to respectively abut the battery from two perpendicular directions during the pre-spot welding of the battery (the third spot welding member 131 abuts the battery along the third side 130 toward the first side 110, and the fourth spot welding member 141 abuts the battery along the fourth side 140 toward the second side 120), so as to move the battery to abut the first spot welding member 111 and the second spot welding member 111. Welding part 121, thereby clamping the battery in the work station. It should be noted that the moving direction of the third spot welding part 131 is the length direction of the battery, and the moving direction of the fourth spot welding part 141 is the width direction of the battery, and each spot welding part corresponds to a separate driving part 200, that is, the movement of each spot welding part is independent. It can be understood that the battery shell will inevitably undergo slight deformation during processing in other steps. Each spot welding part moves separately to support the battery shell, which can ensure that even if the battery shell is slightly deformed, each spot welding part can move to support the connection between the battery shell and the top cover, ensuring the accuracy of the welding point position and the normal progress of subsequent processes.

[0047] In some embodiments, among each second spot welder 121, the two second spot welders 121 at both ends in the length direction of the battery are fixedly connected to the base 100. It can be understood that in the process of clamping the battery, the third spot welder 131 and the fourth spot welder 141 are moved to abut the battery so that the battery abuts against the first spot welder 111 and the second spot welder 121. The battery is fixed by the fixed first spot welder 111 and the second spot welder 121. In the length direction of the battery, the two second spot welders 121 at both ends are fixedly set, which can ensure that when the fourth spot welder 141 and the third spot welder 131 move to abut the battery, the battery can be better positioned, and the battery is not prone to displacement and skew in the work station, thereby ensuring that the pre-spot welding between the battery shell and the top cover can be carried out smoothly.

[0048] In some embodiments, reference Figure 6The top cover pre-spot welding device also has an elastic member 300, and the number of the elastic members 300 corresponds to the number of the second spot welding members 121 that can move relative to the base 100. For the sake of convenience, we define the second spot welding members 121 fixedly connected to the base 100 as second fixed spot welding members, and the remaining second spot welding members 121 that can move relative to the base 100 as second movable spot welding members. Taking the illustrated embodiment as an example, the number of the second spot welding members 121 in the illustrated embodiment is six, of which two second spot welding members 121 are fixedly connected to the base 100 to position the battery, and the other four second spot welding members 121 can move relative to the base 100, that is, the number of the second movable spot welding members is four, then the number of the elastic members 300 is four, and each elastic member 300 is respectively arranged between the second movable spot welding member and the base 100, and applies a relatively distant force to the second movable spot welding member and the base 100. It can be understood that when no battery is placed in the work station, each elastic member 300 is at In the free state, the four second movable spot welders provided with elastic members 300 are in an extended state relative to the base 100, and it should be noted that, in the width direction of the battery, the four second movable spot welders will be closer to the fourth side 140 relative to the two fixed second fixed spot welders. After the battery is placed in the work station, the third spot welder 131 and the fourth spot welder 141 move to drive the battery to move. In the width direction of the battery, the long side of the battery close to the second side 120 will first contact the second movable spot welder provided with elastic members 300, and then continue to move, compressing the elastic member 300 until the long side of the battery abuts against the two fixed second fixed spot welders. At this time, each elastic member 300 is in a compressed state, and each second spot welder 121 abuts against the battery shell, thereby ensuring that even if the battery shell is slightly deformed, each second spot welder 121 can accurately abut against the battery shell, and the pre-welding point is accurate and without deviation, ensuring that the top cover is positioned on the shell and subsequent processes can proceed smoothly.

[0049] It should also be noted that, in the illustrated embodiment, the elastic member 300 is a spring. In actual applications, the form of the elastic member 300 is not limited. It can apply a force to move the second spot weld 121 and the base 100 away from each other, and can be compressed to allow the second spot weld 121 to rest against the battery housing. For example, in other embodiments, the elastic member 300 can be set as a cylinder.

[0050] In some embodiments, reference Figures 1 to 6, the number of the first spot welders 111 and the third spot welders 131 is the same, the number of the second spot welders 121 and the fourth spot welders 141 is the same, and in the length direction of the battery, the first spot welders 111 and the third spot welders 131 are relatively arranged, and each second spot welder 121 and each fourth spot welder 141 are relatively arranged. For the convenience of description, we take the illustrated embodiment as an example. In the illustrated embodiment, the number of the first spot welder 111 and the third spot welder 131 is one, and the second spot welder 121 and the fourth spot welder 141 are six. In the length direction, the first spot welder 111 and the third spot welder 131 are relatively arranged, and in the width direction, each second spot welder 121 and each fourth spot welder 141 corresponds one to one, thereby ensuring that the battery can be clamped from two directions in the length direction and width direction of the battery to prevent the battery from being skewed during positioning and pre-spot welding. The relative arrangement of each spot welder can also ensure that the battery is clamped to prevent the battery from detaching from the work station, thereby ensuring that the pre-spot welding of the battery is carried out smoothly.

[0051] In some embodiments, the pre-spot welding device also has a reset mechanism 400, which can drive the battery to reset to its initial position after the pre-spot welding of the battery is completed, so as to facilitate the collection and transportation of the battery. It can be understood that before pre-spot welding of the battery, the battery needs to be positioned and clamped. In this solution, the battery is clamped by moving the third spot welder 131 and the fourth spot welder 141. Then, during the positioning process of the battery, the battery will move slightly. After the pre-spot welding of the battery is completed, the top cover is positioned on the shell, and the battery needs to be transferred to proceed to the next step. After the battery is moved against the third spot welder 131 and the fourth spot welder 141 and then pre-spot welding is performed, it is no longer in the initial position, so a reset mechanism 400 is provided. After the pre-spot welding of the battery is completed, the battery is moved to its initial position, and then collected and transferred to proceed to the next step.

[0052] At the same time, it can be understood that after the battery enters the work station, the third spot welder 131 abuts the battery along the direction of the third side 130 toward the first side 110, so that the battery abuts the first spot welder 111, and each fourth spot welder 141 abuts the battery along the direction of the fourth side 140 toward the second side 120, so that the battery abuts each second spot welder 121. Then, during the resetting process, the resetting mechanism 400 needs to reset the battery to its initial position, and needs to move the battery along the direction of the first side 110 toward the third side 130 and the direction of the second side 120 toward the fourth side 140, that is, in the opposite direction of movement when the battery is clamped, so that the battery can be moved to the initial position for collection and transportation.

[0053] In some embodiments, the reset mechanism 400 includes a first reset cylinder and a second reset cylinder, wherein the first reset cylinder can drive the welding assembly to move along the first side 110 toward the third side 130, and the second reset cylinder can drive the welding assembly to move along the second side 120 toward the fourth side 140, so as to completely reset the battery to its initial position, and then collect the battery and transport it to the next process. It can be understood that the position of the battery when it is placed in the work station is the initial position, and the third spot welder 131 abuts the battery along the third side 130 toward the first side 110 so that the battery abuts the first spot welder 111, and each fourth spot welder 141 abuts the battery along the fourth side 140 toward the second side 120. The battery is held against each second spot welding part 121, so that the battery is clamped in the work station for pre-spot welding. The battery needs to be reset to its initial position when resetting. The welding assembly is driven by the first reset cylinder to move along the first side 110 toward the third side 130. The battery is held against the first spot welding part 111, and the battery is driven to move along the first side 110 toward the third side 130. The second reset cylinder drives the welding assembly to move along the second side 120 toward the fourth side 140. The battery is held against the second spot welding part 121, and the battery is driven to move along the second side 120 toward the fourth side 140, so that the battery returns to its initial position for collection and transportation to proceed to the next step.

[0054] In some embodiments, the top cover pre-spot welding device also includes a clamp 500, which is arranged on one side of the base 100 and can move relative to the base 100. The clamp 500 can clamp the battery and move the battery into the work station for pre-spot welding of the top cover. The clamp 500 is provided with a locking mechanism, which can limit the relative movement between the top cover and the shell. It can be understood that pre-spot welding is to position the top cover of the battery on the shell to ensure that the subsequent full welding of the top cover is carried out normally. Before pre-spot welding is carried out, the clamp 500 clamps the battery and moves the battery into the work station. It is necessary to adjust the relative position between the top cover and the shell to determine that the position of the top cover is correct. Then the locking mechanism on the clamp 500 locks the top cover, that is, limits the relative movement between the top cover and the shell, so that the battery maintains the set posture and enters the work station. Pre-spot welding can weld the top cover to the shell, and subsequent full welding can be carried out smoothly, and the yield rate of the battery can be further improved.

[0055] In some embodiments, an avoidance groove 150 is further provided on the base 100, and the avoidance groove 150 corresponds to the clamp 500. When the clamp 500 clamps the battery and enters the work station, the clamp 500 is located in the avoidance groove 150, that is, during the pre-spot welding process, the clamp 500 always keeps clamping the battery, and the locking mechanism also always limits the relative movement between the top cover and the shell, thereby ensuring that the battery can maintain a set posture before the pre-spot welding is completed, the shell and the top cover will not move relative to each other, the pre-spot welding can be carried out smoothly, and the top cover will not shift relative to the shell during the pre-spot welding.

[0056] According to the second aspect of the present invention, an embodiment discloses a battery cell shelling device, including the above-mentioned top cover pre-spot welding device. The formed battery cell is placed in the battery shell, the top cover is positioned by the top cover pre-spot welding device, and then full welding is performed to completely connect the top cover to the shell, thereby completing the battery cell shelling.

[0057] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. Top cover pre-spot welding device, used for pre-spot welding between battery shell and top cover, characterized in that: include: A base (100), the base (100) defining a station for accommodating the battery, the station having a first side (110) and a second side (120) perpendicular to each other, a third side (130) spaced apart from the first side (110), and a fourth side (140) spaced apart from the second side (120); A welding assembly, comprising at least one first spot welding component (111), disposed on the first side (110), at least three second spot welding components (121), each of the second spot welding components (121) being spaced apart along the length direction of the battery on the second side (120), at least one third spot welding component (131), disposed on the third side (130), and a plurality of fourth spot welding components (141), each of the fourth spot welding components (141) being spaced apart along the length direction on the fourth side (140); wherein at least one of the first spot welding parts (111) is fixedly connected to the base (100), two of the second spot welding parts (121) are fixedly connected to the base (100), and the remaining second spot welding parts (121) are all movable relative to the base (100) in the width direction of the battery, the third spot welding part (131) is movable relative to the base (100) in the length direction to abut against the battery, so that the battery abuts against the first spot welding part (111) in the length direction, and each of the fourth spot welding parts (141) is movable relative to the base (100) in the width direction of the battery to abut against the battery, so that the battery abuts against each of the second spot welding parts (121) in the width direction; The top cover pre-spot welding device further comprises a plurality of driving members (200), each of the driving members (200) being connected to each of the fourth spot welding members (141) and the third spot welding member (131), respectively, so as to independently drive each of the fourth spot welding members (141) to move along the width direction and abut against the battery, and independently drive the third spot welding member (131) to move along the length direction and abut against the battery; The top cover pre-spot welding device further includes an elastic member (300), wherein a second spot welding member (121) fixedly connected to the base (100) is defined as a second fixed spot welding member, and a second spot welding member (121) movable relative to the base (100) is defined as a second movable spot welding member, and each elastic member (300) is arranged between the second movable spot welding member and the base (100) to apply a force to the second movable spot welding member and the base (100) to move away from each other.

2. The top cover pre-spot welding device according to claim 1, characterized in that: Among the second spot welding parts (121), two of the second spot welding parts (121) at both ends in the longitudinal direction are fixedly connected to the base (100).

3. The top cover pre-spot welding device according to claim 1, characterized in that: The first spot welding parts (111) and the third spot welding parts (131) are the same in number, the second spot welding parts (121) and the fourth spot welding parts (141) are the same in number, and each of the first spot welding parts (111) and each of the third spot welding parts (131) are arranged relative to each other in the length direction, and each of the second spot welding parts (121) and each of the fourth spot welding parts (141) are arranged relative to each other in the width direction.

4. The top cover pre-spot welding device according to claim 1, characterized in that: The top cover pre-spot welding device further includes a reset mechanism (400), which is configured to be able to move the battery along the direction of the first side (110) toward the third side (130) and the direction of the second side (120) toward the fourth side (140) to move the battery to an initial position.

5. The top cover pre-spot welding device according to claim 4, characterized in that: The reset mechanism (400) comprises a first reset cylinder and a second reset cylinder; The first reset cylinder is capable of driving the welding assembly to move along the first side (110) toward the third side (130), and the second reset cylinder is capable of driving the welding assembly to move along the second side (120) toward the fourth side (140) to move the battery to the initial position.

6. The top cover pre-spot welding device according to claim 1, characterized in that: The top cover pre-spot welding device further comprises a clamp (500), wherein the clamp (500) is arranged on one side of the base (100) and is movable relative to the base (100), and the clamp (500) further comprises a locking mechanism, wherein the locking mechanism is capable of abutting against the top cover to limit relative movement between the top cover and the shell, so that the battery can maintain a set posture and enter the work station.

7. The top cover pre-spot welding device according to claim 6, characterized in that: The base (100) further comprises an avoidance groove (150), wherein the avoidance groove (150) corresponds to the clamping claw (500) to accommodate the clamping claw (500) to clamp the battery and enter the work station.

8. Battery cell shelling equipment, characterized in that: include: The top cover pre-spot welding device according to any one of claims 1 to 7.

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