A battery cover plate pin welding device and welding method

Abstract

The application provides a battery cover plate pin welding device and a welding method, and belongs to the technical field of new energy battery processing equipment. The battery cover plate pin welding device comprises a bottom plate, a positioning plate and a pin fixing frame. The bottom plate is provided with a cover plate positioning groove, the positioning plate is provided with a first pin positioning mechanism at both ends, the positioning plate cover is arranged on the cover plate positioning groove, the pin fixing frame is detachably arranged on both sides of the two ends of the cover plate positioning groove, and the side of the pin fixing frame facing the cover plate positioning groove is provided with a second pin positioning mechanism. By using the welding device and the welding method, the shaking problem in the welding process of the pin and the battery cover plate can be solved, and the stability and accuracy of the welding process are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy battery processing equipment, in particular to a battery cover plate pin welding device and a welding method. BACKGROUND

[0002] Now the electric vehicle has entered into the rapid development, but the charging time and the cruising range still are the pain points hindering the development of electric vehicles. Lithium ion power battery has become the preferred power source of new energy vehicles due to its high energy density, long cycle life, environmental friendliness and other characteristics. Among them, the aluminum shell square battery is a common packaging form of lithium ion power battery.

[0003] In the related art, the shell of the electric core in the square battery usually includes a lower shell and a cover plate, a pole is arranged on the cover plate, and the upper part of the lower shell is open. In the preparation of the square core, one end of the current collector connecting piece is welded with the pole on the cover plate, the other end of the current collector connecting piece is welded with the tab extending out of the roll core by ultrasonic welding, and finally the cover plate and the lower shell are closed. In order to reduce the height size of the whole square shell battery, the inside of the existing cover plate is usually provided with a pin integrally welded with the pole, the pin will extend into the lower shell from both sides of the roll core, and the pin will be connected with the side tab of the roll core from the side, so as to replace the traditional current collector arranged between the cover plate and the roll core.

[0004] In the related art, the cover plate and the pin are independent parts, and the corresponding welding needs to be carried out independently during processing. Since the pin is a bent L-shaped structure, one end of the pin is used for welding with the pole, and the other end of the pin is used for extending into the lower shell and welding with the roll core, and the bent section of the pin used for welding with the roll core has a certain height. In the process of moving the pin to the welding position and during the welding process, the pin is prone to shaking, which causes deviation of the welding position. In the subsequent assembly process, interference or scratching short circuit problems occur, which affect the product yield. SUMMARY

[0005] The present application provides a battery cover plate pin welding device and a welding method, which can solve the problem of shaking during welding of the pin and the battery cover plate, and improve the stability and accuracy of welding processing. The technical solution is as follows:

[0006] In a first aspect, the present application provides a battery cover plate pin welding device, comprising a bottom plate, a positioning plate and a pin fixing frame,

[0007] The bottom plate is provided with a cover plate positioning groove, the positioning plate is respectively provided with a first pin positioning mechanism at both ends, the positioning plate cover is arranged on the cover plate positioning groove, the pin fixing frame is detachably arranged at both sides of the cover plate positioning groove, the pin fixing frame is provided with a second pin positioning mechanism, and the second pin positioning mechanism is arranged opposite to the first pin positioning mechanism.

[0008] Optionally, the first pin positioning mechanism is a pin limiting groove with an opening facing the pin fixing frame, and both ends of the cover plate positioning groove are communicated with the outside through the pin limiting groove; and the second pin positioning mechanism is a longitudinal limiting groove with an opening facing the pin limiting groove.

[0009] Optionally, an arc groove is arranged at the connection of the groove wall of the pin limiting groove.

[0010] Optionally, the battery cover plate pin welding device further comprises a pressing cover, the pressing cover is fixedly arranged on the positioning plate, both ends of the pressing cover cover the pin limiting groove, and both ends of the pressing cover are provided with a welding through groove communicated with the pin limiting groove.

[0011] Optionally, a limiting boss is arranged at both ends of the pressing cover in a protruding manner, the limiting boss is communicated with the welding through groove, and the limiting boss is fitted and arranged in the pin limiting groove.

[0012] Optionally, a first positioning connecting piece is arranged on the bottom plate, a second positioning connecting piece matched with the first positioning connecting piece is arranged on the positioning plate, a third positioning connecting piece is arranged on the positioning plate, and a fourth positioning connecting piece matched with the third positioning connecting piece is arranged on the pressing cover.

[0013] Optionally, the first positioning connecting piece and the second positioning connecting piece, and the third positioning connecting piece and the fourth positioning connecting piece are all magnetically attracted pieces matched with each other.

[0014] Optionally, the distance between the pin fixing frame and the cover plate positioning groove is adjustable.

[0015] Optionally, square taking grooves are arranged at both sides of the cover plate positioning groove, one side of the square taking groove is located below the positioning plate, and the other side of the square taking groove is communicated with the outside.

[0016] In the second aspect, the embodiment of the present application further provides a welding method, which is suitable for the battery cover plate pin welding device of the first aspect, the pin comprises a first welding section and a second welding section perpendicular to each other, and the welding method comprises the following steps.

[0017] The battery cover plate is installed in the cover plate positioning groove on the bottom plate, and the inner side of the battery cover plate is arranged upwards;

[0018] The positioning plate cover is arranged on the bottom plate, so that the battery cover plate is press-fitted in the cover plate positioning groove;

[0019] The first welding section of the pin is placed on the battery cover plate from both ends of the positioning plate and is connected with the first pin positioning mechanism, so that the first welding section is attached to the pole column on the inner side of the battery cover plate;

[0020] The pin fixing frame is installed on both sides of the ends of the cover plate positioning groove, and the second welding section of the pin is positioned and supported by the second pin positioning mechanism;

[0021] The first welding section in the pin limiting groove and the pole column are welded.

[0022] The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

[0023] When the battery cover plate and the pin are welded, the battery cover plate is positioned and installed by the cover plate positioning groove, and is press-fitted by the positioning plate cover arranged thereon. Then, the first pin positioning mechanism at both ends of the positioning cover plate is used as a guide and a position limiter to correspondingly install the pin and the welding position of the battery cover plate. Finally, the pin is fixed in multiple directions in the horizontal direction by installing the pin fixing frame, so that the pin and the battery cover plate are stably connected during welding, the problem of shaking of the pin and the battery cover plate during welding is solved, and the stability and accuracy of welding processing are improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiment of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 is a perspective structural schematic view of the battery cover plate pin welding device provided by the embodiment of the application;

[0026] Figure 2 is a top view structural schematic view of the battery cover plate pin welding device provided by the embodiment of the application;

[0027] Figure 3is the front view structural schematic diagram of the battery cover plate pin welding device provided by the embodiment of the application;

[0028] Figure 4 is the assembly structure schematic diagram of the bottom plate and the pin fixing frame provided by the embodiment of the application;

[0029] Figure 5 is the three-dimensional structure schematic diagram of one side of the positioning plate provided by the embodiment of the application;

[0030] Figure 6 is the three-dimensional structure schematic diagram of the other side of the positioning plate provided by the embodiment of the application;

[0031] Figure 7 is the top view structure schematic diagram of the pressing plate provided by the embodiment of the application;

[0032] Figure 8 is the front view structure schematic diagram of the pressing plate provided by the embodiment of the application;

[0033] Figure 9 is the three-dimensional structure schematic diagram of the inner side of the cover plate provided by the embodiment of the application;

[0034] Figure 10 is the welding structure schematic diagram of the cover plate and the pin provided by the embodiment of the application;

[0035] Figure 11 is the flow chart of a welding method provided by the embodiment of the application.

[0036] In the drawings:

[0037] 1-bottom plate; 2-positioning plate; 2a-second square groove; 3-pin fixing frame; 4-pressing cover; 11-cover plate positioning groove; 11a-first square groove; 12-first positioning connecting piece; 13-positioning pin; 14-square taking groove; 15-bolt counterbore; 21-first pin positioning mechanism; 22-second positioning connecting piece; 23-third positioning connecting piece; 24-pin hole; 31-second pin positioning mechanism; 32-limiting plate; 41-welding through groove; 42-limiting boss; 43-fourth positioning connecting piece; 211-circular arc groove; 321-waist-shaped hole; m-cover plate; m1-pole; n-pin; n1-first welding section; n2-second welding section. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the application more clear, the embodiments of the application will be further described in detail below with reference to the drawings.

[0039] In the related art, the shell of the electric core in the square battery usually includes a lower shell and a cover plate, and a pole column is arranged on the cover plate, and the upper part of the lower shell is open. In the preparation of the square electric core, one end of the current collector connecting piece is welded with the pole column on the cover plate, and the other end of the current collector connecting piece is welded with the tab extending from the roll core by ultrasonic welding, and finally the cover plate and the lower shell are closed. In order to reduce the height size of the whole square shell battery, the existing inner side of the cover plate is usually provided with a pin integrally welded with the pole column, and the pin extends into the lower shell from both sides of the roll core and is connected with the side tab of the roll core from the side, so as to replace the traditional current collector arranged between the cover plate and the roll core.

[0040] In the related art, the cover plate and the pin are independent parts, and the corresponding welding needs to be carried out independently during processing. Since the pin is a bent L-shaped structure, one end of the pin is used for welding with the pole column, and the other end of the pin is used for extending into the lower shell and welding with the roll core, and the bent section of the pin for welding with the roll core has a certain height. In the process of moving the pin to the welding position and during the welding process, the pin is prone to shaking, which causes deviation of the welding position. In the subsequent assembly process, interference or scratching and short circuit problems occur, which affect the product yield.

[0041] Figure 1 FIG. 1 is a perspective view of a battery cover plate pin welding device according to an embodiment of the present application. Figure 2 FIG. 2 is a top view of a battery cover plate pin welding device according to an embodiment of the present application. Figure 3 FIG. 3 is a front view of a battery cover plate pin welding device according to an embodiment of the present application. Figure 4 FIG. 4 is an assembly structure diagram of a base plate and a pin fixing frame according to an embodiment of the present application. Figure 5 FIG. 5 is a perspective view of one side of a positioning plate according to an embodiment of the present application. Figure 6 FIG. 6 is a perspective view of the other side of a positioning plate according to an embodiment of the present application. Figure 7 FIG. 7 is a top view of a pressing plate according to an embodiment of the present application. Figure 8 FIG. 8 is a front view of a pressing plate according to an embodiment of the present application. Figures 1 to 8 As shown in FIG. 8, through practice, the present application provides a battery cover plate pin welding device, which includes a base plate 1, a positioning plate 2 and a pin fixing frame 3.

[0042] Among them, the base plate 1 is provided with a cover plate positioning groove 11, the two ends of the positioning plate 2 are respectively provided with a first pin positioning mechanism 21, and the positioning plate 2 is arranged on the cover plate positioning groove 11. The pin fixing frame 3 is detachably installed on the both sides of the two ends of the cover plate positioning groove 11, the pin fixing frame 3 is provided with a second pin positioning mechanism 31, and the second pin positioning mechanism 31 is oppositely arranged with the first pin positioning mechanism 21.

[0043] Specifically, in the embodiment of the present application, the bottom plate 1 is provided with a cover plate positioning groove 11 and a first positioning connecting piece 12, and the positioning plate 2 is provided with a first pin positioning mechanism 21 at each end, which is a pin limiting groove arranged towards the pin fixing frame 3. The positioning plate 2 is provided with a second positioning connecting piece 22 matched with the first positioning connecting piece 12. The positioning plate 2 is arranged on the bottom plate 1 and covers the cover plate positioning groove 11, and is fixedly connected with the bottom plate 1 through the first positioning connecting piece 12 and the second positioning connecting piece 22. The two ends of the cover plate positioning groove 11 are respectively communicated with the outside through the pin limiting groove, and the pin fixing frame 3 is detachably installed on the side of the two ends of the cover plate positioning groove 11, and the pin fixing frame 3 is provided with a second pin positioning mechanism 31 on the side facing the cover plate positioning groove 11, which is a longitudinal limiting groove opening towards the pin limiting groove, and the second pin positioning mechanism 31 is arranged opposite to the opening of the first pin positioning mechanism 21.

[0044] Figure 9 is a schematic diagram of the three-dimensional structure of the inner side of the cover plate provided by the embodiment of the present application. Figure 10 is a schematic diagram of the welding structure of the cover plate and the pin provided by the embodiment of the present application. As shown in Figures 9 to 10 , in the embodiment of the present application, the battery cover plate m is a rectangular cover plate structure of a square battery, and both ends in the length direction are provided with a pole m1 communicating the outer side and the inner side. The pin n to be welded with it includes a first welding section n1 and a second welding section n2 arranged perpendicular to each other, the first welding section n1 is relatively short, used for welding connection with the pole end on the inner side of the battery cover plate m, and the second welding section n2 is relatively long, bent to form an L-shaped structure with the first welding section n1, used for extending from the side of the internal roll core and connecting with the pole lug of the roll core after assembly.

[0045] In the welding of the battery cover plate m and the pin n by the battery cover plate pin welding device provided by the embodiment of the application, first, the battery cover plate m is installed in the cover plate positioning groove 11 on the base plate 1 in a posture with the inner side facing upwards, the cover plate positioning groove 11 is a rectangular groove matched with the battery cover plate m, and the pre-positioning of the battery cover plate m is realized. Then, the positioning plate 2 is covered on the base plate 1 and fixedly connected with the base plate 1 through the first positioning connecting piece 12 and the second positioning connecting piece 22, so as to press and fix the battery cover plate m in the cover plate positioning groove 11, avoiding the relative shaking of the battery cover plate m during welding. At this time, the first pin positioning mechanism 21 at both ends of the positioning plate 2 is just located above the to-be-welded position of the battery cover plate m, that is, above the pole column m1. The opening width of the first pin positioning mechanism 21 is set to be the same as the width of the first welding section n1. The first welding section n1 of the pin n can be inserted from the opening of the first pin positioning mechanism 21 at both ends of the positioning plate 2 and abut with the pole column m1 on the inner side of the battery cover plate m. At this time, the side wall of the first pin positioning mechanism 21 can limit and fix the side edges of the first welding section n1 in the horizontal direction, except the position connected with the second welding section n2. Finally, the pin fixing frame 3 is installed on both sides of the two ends of the cover plate positioning groove 11, and the second welding section n2 of the pin n is positioned and supported by the second pin positioning mechanism 31, so as to avoid the shaking of the second welding section n2 in the upright state due to its own weight during welding, thereby realizing the multi-directional limiting and fixing of the pin n and ensuring the stable butt joint of the pin n and the battery cover plate m. Then, the first welding section n1 in the pin limiting groove and the pole column m1 can be welded. After the welding of the two pins n and the battery cover plate m is completed, the positioning plate 2 and the pin fixing frame 3 are removed, and the welded pin n and the battery cover plate m are taken out together for the next round of welding processing.

[0046] In the welding of the battery cover plate m and the pin n by the battery cover plate pin welding device provided by the embodiment of the application, through the cover plate positioning groove 11, the battery cover plate m is positioned and installed and is press-fitted on the positioning plate 2. Then, the first pin positioning mechanism 21 at both ends of the positioning plate 2 is used as a guide and a limit to correspondingly install the to-be-welded positions of the pin n and the battery cover plate m. Finally, the pin fixing frame 3 is installed to realize the multi-directional limiting and fixing of the pin n in the horizontal direction, so as to ensure the stable butt joint of the pin n and the battery cover plate m during welding, solve the shaking problem of the pin and the battery cover plate during welding, and improve the stability and accuracy of the welding processing.

[0047] Exemplarily, in the embodiment of the present application, three first square grooves 11a are arranged on the bottom wall of the cover plate positioning groove 11 at intervals, for avoiding the protruding structure part on the outer side surface of the battery cover plate m. The second square groove 2a is arranged on the plate surface of the positioning plate 2 facing the cover plate positioning groove 11, for avoiding the protruding part on the inner side surface of the battery cover plate m except the pole m1, to avoid interference and improve the adaptability.

[0048] Exemplarily, in the embodiment of the present application, the edge of the bottom plate 1 is also uniformly and spacedly arranged with six bolt counterbores 15, and the whole welding device can be locked and fixed on the base of the welding equipment through the bolt counterbores 15.

[0049] Optionally, the distance between the pin fixing frame 3 and the cover plate positioning groove 11 is adjustable. Exemplarily, in the embodiment of the present application, the side opposite to the second pin positioning mechanism 31 of the pin fixing frame 3 is protrusively arranged with a limiting plate 32, and the limiting plate 32 is arranged with a waist-shaped hole 321. The waist-shaped hole 321 is arranged along the length direction of the cover plate positioning groove 11, and the bottom plate 1 is arranged with a threaded hole corresponding to the waist-shaped hole 321. When installing the pin fixing frame 3, the pin fixing frame 3 can be pre-positioned by screwing the bolt into the waist-shaped hole 321 and the threaded hole in turn, and then the relative position between the pin fixing frame 3 and the bottom plate 1 is adjusted towards the cover plate positioning groove 11 until the second pin positioning mechanism 31 contacts the second welding section n2, and then the pin fixing frame 3 is fixedly connected with the cover plate positioning groove by tightening the bolt. By adopting the adjustable distance between the pin fixing frame 3 and the cover plate positioning groove 11, it is convenient to use the pin fixing frame 3 to laterally contact and position the second welding section n2 of the pin n after the preliminary installation of the pin n is completed. Meanwhile, when the specifications of the pin n are different, corresponding to the two second welding sections n2 with different distances, by adjusting the distance between the pin fixing frame 3 and the cover plate positioning groove 11, the welding device can also be adaptively positioned and installed, improving the adaptability and practicality of the battery cover plate pin welding device.

[0050] Optionally, the battery cover plate pin welding device further comprises a pressing cover 4, the pressing cover 4 is fixedly arranged on the positioning plate 2, both ends of the pressing cover 4 cover the first pin positioning mechanism 21, and both ends of the pressing cover 4 are arranged with welding through grooves 41 communicating with the first pin positioning mechanism 21. Exemplarily, in the embodiment of the present application, after the butt joint of the pin n and the cover plate m is completed, the pressing cover 4 can be correspondingly arranged on the positioning plate 2, at this time, both ends of the pressing cover 4 will cover the part of the position where the first welding section n1 and the battery cover plate m contact, and the position to be welded is communicated with the outside through the welding through grooves 41. At this time, the worker can weld the first welding section n1 and the battery cover plate m through the opening of the welding through grooves 41, which ensures the accuracy of the welding position, reduces useless welding, and further improves the stability and accuracy of the welding process.

[0051] Optionally, the two ends of the cover 4 are provided with limiting bosses 42, and the welding through groove 41 is communicated with the limiting bosses 42, and the limiting bosses 42 are matched and installed in the first pin positioning mechanism 21. Illustratively, in the embodiment of the application, after the cover 4 is covered in place, the limiting bosses 42 at the two ends of the cover 4 are sunk into the two first pin positioning mechanisms 21, so that the first welding section n1 is pressed and fixed on the battery cover plate m, the first welding section n1 of the pin n is prevented from shaking in the vertical direction during the welding process, and the stability and accuracy of the welding process are further improved.

[0052] Optionally, the positioning plate 2 is provided with a third positioning connecting piece 23, and the cover 4 is provided with a fourth positioning connecting piece 43 matched with the third positioning connecting piece 23. Illustratively, in the embodiment of the application, the first positioning connecting piece 12 and the second positioning connecting piece 22, the third positioning connecting piece 23 and the fourth positioning connecting piece 43 are all magnetic attraction pieces matched with each other. When the battery cover plate pin welding device is assembled, the positioning plate 2 is covered in place on the bottom plate 1, and is magnetically attracted and fixed through the first positioning connecting piece 12 and the second positioning connecting piece 22. When the cover 4 is covered in place on the positioning plate 2, it is magnetically attracted and fixed through the third positioning connecting piece 23 and the fourth positioning connecting piece 43. The stability of the pressing of the battery cover plate m and the alignment of the welding position of the pin n is ensured, and relaxation is avoided, and the stability and accuracy of the welding process are further improved.

[0053] Optionally, the bottom plate 1 is provided with a positioning pin 13, and the positioning plate 2 is provided with a pin hole 24 matched with the positioning pin 13. Illustratively, in the embodiment of the application, when the positioning plate 2 is covered, the positioning plate 2 can be first aligned with the positioning pin 13 on the bottom plate 1 through the pin hole 24 and then pressed to complete the covering. After the covering is completed, the cooperation structure of the positioning pin 13 and the pin hole 24 can also limit the positioning plate 2 in the horizontal direction, so as to ensure the stability of the covering, and further improve the assembly stability of the battery cover plate pin welding device.

[0054] Optionally, the groove wall connection of the first pin positioning mechanism 21 is provided with a circular arc groove 211. Illustratively, in the embodiment of the application, the edge of the pin n is usually die-cut into a right angle structure, and after the first welding section n1 is inserted into the circular arc groove 211 and installed in place, the circular arc groove 211 at the groove wall connection of the pin limiting groove can avoid the right angle edge of the first welding section n1, so as to avoid direct contact and scratching deformation, affect the subsequent welding, and further improve the stability and accuracy of the welding process.

[0055] Optionally, square-shaped taking grooves 14 are arranged on both sides of the cover plate positioning groove 11, one side of the square-shaped taking grooves 14 is below the positioning plate 2, and the other side of the square-shaped taking grooves 14 is in communication with the outside. In the embodiment of the present application, for example, when the positioning plate 2 is arranged on the bottom plate 1, the side edges of the positioning plate 2 in the length direction will cover the side of the square-shaped taking grooves 14, and the square-shaped taking grooves 14 will extend to both sides along the direction perpendicular to the side wall of the cover plate positioning groove 11, and the other side is in communication with the outside. When the positioning plate 2 needs to be separated for cleaning after welding, the worker can insert his fingers into the square-shaped taking grooves 14 from the side in communication with the outside, and then pry the positioning plate 2 from the bottom of the side edge of the positioning plate 2, which is convenient, labor-saving, and improves the practicability of the battery cover plate pin welding device.

[0056] Figure 11 is a flowchart of a welding method provided by the embodiment of the present application. As shown in Figure 11 , the embodiment of the present application also provides a processing method for positioning and welding of a battery cover plate m and a pin n, which is suitable for a battery cover plate pin welding device as shown in Figures 1 to 8 , the pin n includes a first welding section n1 and a second welding section n2 perpendicular to each other, and the processing method includes:

[0057] S1, the battery cover plate m is arranged in the cover plate positioning groove 11 on the bottom plate 1, and the inner side of the battery cover plate m is arranged upward.

[0058] S2, the positioning plate 2 is arranged on the bottom plate 1 to press and fix the battery cover plate m in the cover plate positioning groove 11.

[0059] S3, the first welding section n1 of the pin n is placed on the battery cover plate m from both ends of the positioning plate 2 and connected with the first pin positioning mechanism 21, so that the first welding section n1 is attached to the pole column m1 on the inner side of the battery cover plate m.

[0060] S4, the pin fixing frame 3 is arranged on both sides of the cover plate positioning groove 11, and the second pin positioning mechanism 31 is used to position and support the second welding section n2 of the pin n.

[0061] S5, the first welding section n1 in the pin limiting groove and the pole column m1 are welded.

[0062] The battery cover plate pin welding device and the welding method can position and install the battery cover plate m through the cover plate positioning groove 11 and press and fix the cover plate 2 on the battery cover plate m when welding the battery cover plate m and the pin n. Then, the first pin positioning mechanism 21 at the two ends of the cover plate 2 is used as a guide and a position limiter to correspondingly install the pin n and the welding position of the battery cover plate m, and finally, the pin fixing frame 3 is installed to realize multi-directional position limiting and fixing of the pin n in the horizontal direction, so that the pin n and the battery cover plate m are stably connected during the welding process, the shaking problem of the pin and the battery cover plate during the welding process is solved, and the stability and accuracy of the welding process are improved.

[0063] Unless otherwise defined, technical terms or scientific terms used herein shall have the ordinary meanings as understood by one of ordinary skill in the art to which this application pertains. The terms "first", "second", and similar terms as used in the specification and claims of this application do not necessarily have an ordinal, sequential, or chronological significance. Rather, such terms are used merely to distinguish one element from another. Similarly, the terms "a" or "an" are not intended to mean "one and only one", but rather are intended to mean "one or more". The terms "including", "comprising", and similar terms are intended to mean that the elements or objects in the "including", "comprising", or similar recitations are not exhaustive, but rather are inclusive of other elements or objects not specifically recited. The term "connected" or "coupled" is intended to mean either a direct connection or an indirect connection between two or more elements, and can include the presence of one or more intervening elements.

[0064] The above description is only optional embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cover pin welding device, characterized in that, include: Base plate (1), positioning plate (2) and pin fixing bracket (3). The base plate (1) is provided with a cover plate positioning groove (11), and the two ends of the positioning plate (2) are respectively provided with a first pin positioning mechanism (21). The positioning plate (2) covers the cover plate positioning groove (11), and the pin fixing bracket (3) is detachably installed on both sides of the cover plate positioning groove (11). The pin fixing bracket (3) is provided with a second pin positioning mechanism (31), and the second pin positioning mechanism (31) is arranged opposite to the first pin positioning mechanism (21). The first pin positioning mechanism (21) is a pin limiting groove with its opening facing the pin fixing frame (3), and the two ends of the cover plate positioning groove (11) are respectively connected to the outside through the pin limiting groove; the second pin positioning mechanism (31) is a longitudinal limiting groove with its opening facing the pin limiting groove. The battery cover pin welding device also includes a pressure cover (4), which is fixedly mounted on the positioning plate (2). Both ends of the pressure cover (4) cover the pin limiting groove, and both ends of the pressure cover (4) are provided with welding through grooves (41) that communicate with the pin limiting groove.

2. The battery cover pin welding device according to claim 1, characterized in that, The pin limiting groove has an arc groove (211) at the groove wall connection.

3. The battery cover pin welding device according to claim 1, characterized in that, The pressure cap (4) has protruding limiting bosses (42) at both ends. The welding through groove (41) is connected to the limiting bosses (42). The limiting bosses (42) are fitted into the pin limiting groove.

4. The battery cover pin welding device according to claim 1, characterized in that, The base plate (1) is provided with a first positioning connector (12), the positioning plate (2) is provided with a second positioning connector (22) that matches the first positioning connector (12), the positioning plate (2) is provided with a third positioning connector (23), and the pressure cover (4) is provided with a fourth positioning connector (43) that matches the third positioning connector (23).

5. The battery cover pin welding device according to claim 4, characterized in that, The first positioning connector (12), the second positioning connector (22), the third positioning connector (23), and the fourth positioning connector (43) are all mutually matching magnetic components.

6. The battery cover pin welding apparatus according to any one of claims 1 to 5, characterized in that, The distance between the pin fixing bracket (3) and the cover plate positioning groove (11) is adjustable.

7. The battery cover pin welding apparatus according to any one of claims 1 to 5, characterized in that, The cover plate positioning groove (11) is provided with square retrieval slots (14) on both sides. One side of the square retrieval slot (14) is located below the positioning plate (2), and the other side of the square retrieval slot (14) is connected to the outside.

8. A welding method for positioning welding of a battery cover (m) and pins (n), applicable to the battery cover pin welding apparatus as described in any one of claims 1 to 7, characterized in that, The pin (n) includes a first soldering segment (n1) and a second soldering segment (n2) that are perpendicular to each other, and the soldering method includes: The battery cover (m) is installed in the cover positioning groove (11) on the base plate (1) so that the inner side of the battery cover (m) faces upward. The positioning plate (2) is placed on the base plate (1) to press and fix the battery cover plate (m) in the positioning groove (11) of the cover plate; The first welding segment (n1) of the pin (n) is placed on the battery cover (m) from both ends of the positioning plate (2) and connected with the first pin positioning mechanism (21) so that the first welding segment (n1) is in contact with the terminal post (m1) located on the inner side of the battery cover (m); The pin fixing bracket (3) is installed on both sides of the cover plate positioning groove (11), and the second pin positioning mechanism (31) is used to position and support the second soldering section (n2) of the pin (n); The first welding segment (n1) and the pole piece (m1) located in the pin limiting groove are welded together.

Images