Elastic pin and battery welding positioning mechanism

Abstract

The utility model relates to an elastic pin and a battery welding positioning mechanism. The elastic pin comprises a sliding sleeve, the positioning pin is elastically mounted in the sliding sleeve; and the elastic force adjusting piece is arranged in the sliding sleeve in an elastic force adjustable mode and abuts against one side of the positioning pin. The battery welding positioning mechanism comprises the elastic pin. When the elastic abutting piece is pressed downwards to abut against a battery roll core, self-locking of the elastic abutting piece is completed through the elastic pins on the two sides, after welding is completed, self-locking can be unlocked by rotating the elastic abutting piece, and therefore the elastic abutting piece is taken down, and a battery welded inside can be taken out conveniently; the whole structure is easy to operate, automatic locking and automatic unlocking can be achieved, taking-out is convenient, stability is better, and the welding efficiency of the battery shell and the battery roll core is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery welding, in particular to an elastic column pin and a battery welding positioning mechanism. Background Art

[0002] The wound battery is composed of multiple layers of positive and negative plates, a separator and an electrolyte. Its structure is different from that of the traditional lead-acid battery, and it is manufactured by winding. The positive and negative plates in the wound battery are wound with thin sheets of lead-acid electrode material.

[0003] Since wound batteries are manufactured in a winding manner, the electrode area can be increased within a limited space. Therefore, wound batteries have the advantages of large capacity and low energy consumption. Therefore, wound batteries are usually used in the field of new energy vehicles.

[0004] When processing and assembling wound batteries, the winding machine is required to first roll the thin sheet of lead-acid electrode material out of the battery core inside the battery, and then insert the battery core into the battery shell. The two are welded together using the penetration welding method, and then the electrolyte is injected into the battery shell, and finally packaged.

[0005] In the penetration welding of the battery, in order to ensure the reliable contact between the battery core and the battery shell, thereby avoiding the situation of welding disconnection, the battery shell and the battery core need to be placed in the welding jig in turn, and a pressing mechanism is installed on the other side of the welding jig to press the battery core (such as by pressing with a cylinder or by screwing). In this way, when taking and placing the battery products, the pressing mechanism needs to be disassembled and assembled, the operation steps are complicated, it is not convenient to take and place the internal battery, and it will also affect the welding efficiency of the battery. Utility Model Content

[0006] The utility model aims to provide an elastic column pin and a battery welding positioning mechanism, which solves the defects of the existing lithium battery that the battery is inconvenient to take and put during welding, and affects the battery welding efficiency.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: the utility model provides an elastic pin, which includes:

[0008] Sliding sleeve;

[0009] A positioning pin, wherein the positioning pin is elastically mounted in the sliding sleeve;

[0010] The elastic force adjusting piece is elastically adjustable and arranged in the sliding sleeve and abuts against one side of the positioning pin.

[0011] Optimally, the sliding sleeve includes a sliding sleeve body, a backing plate integrally connected to one end of the sliding sleeve body, a through hole penetrating the backing plate, and a limit block annularly arranged on the inner side wall of the sliding sleeve body.

[0012] Optimally, the locating pin includes a pin plate, a pin column integrally connected to one side of the pin plate and passing through a through hole, and a stop block integrally connected to the outside of the pin plate, and a concave-convex structure that is plugged into each other is formed between the stop block and the limit block to limit the rotation of the locating pin.

[0013] Optimally, the elastic force adjustment member includes a plug screwed on the other end of the sliding sleeve body and an adjustment spring arranged in the sliding sleeve body, and the adjustment spring is respectively arranged between the pin plate and the plug.

[0014] Optimally, the positioning pin also includes a pin ball integrally connected to a side of the pin column away from the pin plate and a pin groove provided in the pin ball.

[0015] The utility model also provides a battery welding positioning mechanism, comprising the elastic column pin as described above.

[0016] Optimally, the battery welding positioning mechanism also includes:

[0017] A shell assembly, the shell assembly comprising a jig shell and a through slot penetrating the jig shell, the battery shell being inserted into the through slot, and the battery coil being inserted into the battery shell;

[0018] A cover plate, the cover plate being fixed to one side of the jig shell;

[0019] An elastic pressing member, which is pressed on the other side of the jig shell and presses against the battery coil core;

[0020] The elastic pin is inserted in the fixture shell and is used for self-locking the elastic pressing piece.

[0021] Optimally, the shell assembly also includes a pressing groove opened on the other side of the jig shell and a pin hole opened on the inner wall of the pressing groove, the elastic pin is inserted in the pin hole, and the elastic pressing piece is pressed into the pressing groove.

[0022] Optimally, the elastic pressing member includes a rear cover pressed into the pressing groove, a bottom bracket pressed against the battery coil core, and a compression spring arranged between the rear cover and the bottom bracket.

[0023] Optimally, the elastic pressing member further comprises a bayonet arranged around the outer side of the rear cover and a clamping strip arranged between adjacent bayonet openings, and the positioning pin cooperates with the clamping strip to achieve self-locking of the elastic pressing member.

[0024] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0025] When the utility model presses the elastic pressing piece downward to press the battery core tightly, the elastic pins on both sides complete the self-locking of the elastic pressing piece. After welding is completed, the elastic pressing piece can be rotated to unlock the self-locking, so that the elastic pressing piece can be removed, and the internal welded battery can be easily taken out. The whole set of structure is easy to operate, and can realize automatic locking and automatic unlocking, which is convenient for removal, and has better stability, thereby improving the welding efficiency of the battery shell and the battery core.

[0026] Furthermore, the setting of the elastic force adjustment member can change the compression amount of the adjustment spring, thereby changing the elastic force of the adjustment spring, and realizing the adjustment of different self-locking forces;

[0027] Furthermore, a concave-convex structure that is plugged into each other is formed between the limit block and the stop block, thereby limiting the rotation of the positioning pin and facilitating the realization of the self-locking function;

[0028] Furthermore, the positioning groove can prevent the battery shell from shaking while positioning the battery shell in the vertical direction, thereby improving the effect of welding the battery shell and the battery core.

[0029] Furthermore, the compression spring is provided to elastically press the battery casing and the battery core that are inserted together, which can not only ensure the effect of welding the battery casing and the battery core to avoid disconnection, but also avoid indentations on the end surface of the battery core. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0031] Figure 1 It is an exploded view of the utility model;

[0032] Figure 2 It is a partial cross-sectional view of the utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the jig shell of the utility model;

[0034] Figure 4 This is a schematic structural diagram of the jig shell of the utility model from another angle;

[0035] Figure 5 This is a structural schematic diagram of the cover plate of the utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the rear cover of the utility model;

[0037] Figure 7This is a schematic structural diagram of the rear cover of the utility model from another angle;

[0038] Figure 8 It is a cross-sectional view of the elastic pin of the utility model;

[0039] Fig. 9 This is a front view of the sliding sleeve of the utility model;

[0040] Fig.10 This is a schematic diagram of the structure of the positioning pin of the utility model;

[0041] Fig.11 This is a cross-sectional view of the utility model after the positioning pin and the sliding sleeve are assembled together;

[0042] The reference numerals are described as follows:

[0043] 1. Fixture shell; 2. Through slot; 3. Heat dissipation hole; 4. Internal fixing hole; 5. Pressing slot; 6. Pillar pin hole; 7. Cover plate; 8. External fixing hole; 9. Positioning slot; 10. Welding hole; 11. Fastening bolt; 12. Battery shell; 13. Battery coil core; 14. Bottom bracket; 15. Spring slot; 16. Compression spring; 17. Back cover; 18. Bottom bracket slot; 19. Rotation pit; 20. Arc pit; 21. Bayonet; 22. Card strip; 23. Sleeve body; 24. Butt plate; 25. Guide part; 26. Through hole; 27. Limit block; 28. Pin plate; 29. ​​Pin column; 30. Pin ball; 31. Pin slot; 32. Butt block; 33. Adjustment spring; 34. Plug. DETAILED DESCRIPTION

[0044] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] like Figure 1 As shown, it is an exploded view of the battery welding positioning mechanism of the utility model, which is usually used for welding the battery coil core 13 and the battery shell 12. The welding positioning mechanism includes a shell assembly, a cover assembly, an elastic pressing member and an elastic pin.

[0048] like Figure 3 , 4 As shown, it is a structural schematic diagram of the shell assembly. During welding, the battery shell 12 is inserted into the shell assembly, and the battery roll core 13 is inserted into the battery shell. The axial positioning of the battery shell 12 is completed by the shell assembly. The shell assembly includes a jig shell 1, a through groove 2, a heat dissipation hole 3, an internal fixing hole 4, a pressing groove 5 and a pin hole 6.

[0049] The jig shell 1 is rectangular and made of an insulating material (such as bakelite). Because the battery core 13 is charged during welding, the jig shell 1 made of insulating material can avoid electric shock accidents. The through slot 2 runs through the jig shell 1, which facilitates the insertion of the battery shell 12 and the battery core 13 during welding. The jig shell 1 has a first side surface and a second side surface that are arranged opposite to each other. The through slot 2 runs through the first side surface and the second side surface of the jig shell 1 (at Figure 3 From the perspective of the jig shell 1, the upper surface of the jig shell 1 is the first side surface, and the lower surface of the jig shell 1 is the second side surface; when the jig shell 1 is turned over to Figure 4 From a viewing angle of , the left side surface of the jig shell 1 is the first side surface, and the right side surface of the jig shell 1 is the second side surface).

[0050] The pressing groove 5 is opened on the first side surface of the jig shell 1, and the diameter of the pressing groove 5 is larger than the diameter of the through groove 2. After the battery shell 12 and the battery roll core 13 are inserted into the through groove 2, the elastic pressing part is pressed into the pressing groove 5 to press the battery shell 12 and the battery roll core 13 tightly, thereby improving the welding effect of the two and avoiding contact failure after welding.

[0051] The inner fixing holes 4 are opened on the second side surface of the jig shell 1 and are located at the four corners of the jig shell 1. The inner fixing holes 4 are used in conjunction with the outer fixing holes 8 to fix the cover plate 7 and position the battery shell 12 and the battery roll core 13 inserted into the through groove 2.

[0052] The pin hole 6 penetrates the jig shell 1 in the radial direction and is close to the first side surface of the jig shell 1. Figure 3 , 4 As shown, the pin hole 6 passes through the pressing groove 5, and the elastic pin is inserted into the pin hole 6. After the elastic pressing piece is pressed into the pressing groove 5, the elastic pin completes the self-locking of the elastic pressing piece.

[0053] The heat dissipation holes 3 penetrate the outer wall of the fixture shell 1 and are used to discharge the heat generated by welding in time during welding to improve the welding effect.

[0054] The cover plate assembly is fixed on the second side surface of the jig shell 1 to position the battery housing 12 and the battery coil core 13 inserted into the through slot 2. Figure 5 The figure is a schematic diagram of the structure of the cover plate assembly, which includes a cover plate 7, an external fixing hole 8, a positioning groove 9, a welding hole 10 and a fastening bolt 11. The four corners of the cover plate 7 are provided with external fixing holes 8 (the hole diameters and positions are mutually corresponding) that match the internal fixing holes 4. The fastening bolts 11 are used to complete the fixing of the cover plate 7 and the fixture shell 1.

[0055] A positioning groove 9 is formed on the side of the cover plate 7 close to the jig shell 1 through a milling process. After the battery housing 12 is inserted from the first side of the jig shell 1, it will be against the positioning groove 9 of the cover plate 7, and the battery housing 12 is positioned vertically by the positioning groove 9. The diameter of the battery housing 12 is equal to the diameter of the positioning groove 9, which can prevent the battery housing 12 from shaking during welding, thereby improving the effect of welding the battery housing 12 and the battery core 13.

[0056] The welding hole 10 is formed at the bottom of the positioning groove 9 and passes through the cover plate 7 . The welding hole 10 is coaxially arranged with the positioning groove 9 to provide space for laser injection and welding during welding.

[0057] During actual welding, place the cover plate 7 against the second side of the jig shell 1, and adjust the position of the cover plate 7 until the outer fixing hole 8 is aligned with the inner fixing hole 4. Then, the cover plate 7 is fixed to the jig shell 1 by means of the fastening bolts 11, and a structure with one end open and the other end closed is formed (i.e., the first side of the jig shell 1 is open). The battery shell 12 to be welded is placed into the through groove 2 from the opening, and the positioning groove 9 is used to position the battery shell 12, and then the battery roll core 13 to be welded is inserted into the battery shell 12, and the preliminary preparation for welding is completed.

[0058] The elastic pressing member is pressed into the pressing groove 5 of the jig shell 1, and is used to elastically press the battery shell 12 and the battery core 13 inserted together, which can not only ensure the effect of welding the battery shell 12 and the battery core 13 to avoid disconnection, but also avoid pressing an indentation on the end surface of the battery core 13. The elastic pressing member includes a bottom bracket 14, a spring groove 15, a pressing spring 16, a rear cover 17 and a bottom bracket groove 18.

[0059] The bottom bracket 14 is placed in the pressing groove 5 of the jig shell 1 and abuts against the side of the battery core 13 away from the cover plate 7. A spring groove 15 is provided on the side of the bottom bracket 14 away from the battery core 13. As shown in FIG2 , the cross-section of the bottom bracket 14 and the spring groove 15 is in a “[” shape, and the opening of the “[” shape faces upward (i.e., the opening of the “[” shape is away from the battery core 13).

[0060] The compression spring 16 is arranged in the spring groove 15. Under the action of the back cover 17, the compression spring 16 is compressed and deformed. Under the action of the reverse force of the compression spring 16, the battery core 13 is tightly pressed into the battery shell 12, which can ensure the effect of welding the battery shell 12 and the battery core 13 and avoid disconnection; and the elastic pressure can also avoid pressing marks on the end surface of the battery core 13. The base 14 is made of insulating material (such as bakelite). Because the battery core 13 is charged during welding, the bakelite made of insulating material can avoid electric shock accidents.

[0061] like Figure 6 , 7 As shown, the rear cover 17 is pressed in from the pressing groove 5, and a base bracket groove 18 is provided on the side of the rear cover 17 close to the base bracket 14, and the two sides of the compression spring 16 are respectively fixed between the base bracket 14 and the rear cover 17. As the rear cover 17 is pressed in, the compression spring 16 is elastically deformed.

[0062] In order to realize the self-locking of the rear cover 17, the elastic pressing member further includes a bayonet 21 and a clamping strip 22. The bayonet 21 is arranged on the outer surface of the rear cover 17, and a clamping strip 22 is formed between adjacent bayonet 21 in the axial direction. The design of the bayonet 21 and the clamping strip 22 cooperates with the elastic pins on both sides of the jig shell 1 to complete the self-locking of the rear cover 17, and prevents the rear cover 17 from loosening when welding the battery shell 12 and the battery roll core 13, thereby affecting the welding effect.

[0063] To facilitate the opening of the rear cover 17 after self-locking, the elastic pressing member further includes a rotation pit 19 and an arc pit 20. There are at least two groups of rotation pits 19 and they are opened on the side of the rear cover 17 away from the battery roll core 13, and there are at least two groups of arc pits 20 and they are opened on the side of the rear cover 17 away from the battery roll core 13. The arc pits 20 on the rear cover 17 can be conveniently rotated manually, and the rotation pits 19 can be used for mechanical automatic rotation to release the self-locking of the elastic pin on the rear cover 17, so as to facilitate opening the rear cover 17 and removing the welded finished product.

[0064] The elastic pin is inserted into the pin hole 6. When the elastic pressing member is inserted into the pressing groove 5, the rear cover 17 is self-locked by the elastic pin. After the welding is completed, the rear cover 17 is screwed to release the self-locking of the rear cover 17. Figure 8 As shown, the elastic pin includes a sliding sleeve, a positioning pin and an elastic force adjustment member.

[0065] like Figure 8 , 9 As shown in FIG. 1 , the sleeve includes a sleeve body 23, a stop plate 24, a guide portion 25, a through hole 26 and a stop block 27. The sleeve body 23 is a hollow annular tube having a first end face and a second end face oppositely disposed. Figure 8From the perspective of , the left end face of the sleeve body 23 is the first end face, and the right end face of the sleeve body 23 is the second end face. When the sleeve is inserted into the pin hole 6, the inner end face of the sleeve body 23 is the first end face, and the outer end face of the sleeve body 23 is the second end face.

[0066] The abutment plate 24 is integrally connected to the first end surface of the sleeve body 23, and an inclined guide portion 25 is provided between the abutment plate 24 and the sleeve body 23. When the sleeve body 23 is inserted from the outside to the inside, the guide portion 25 facilitates the insertion of the sleeve body 23. When the rear cover 17 is self-locking, the abutment plate 24 is used to resist the elastically extended positioning pin.

[0067] The through hole 26 penetrates the abutment plate 24 and is coaxially arranged with the sleeve body 23 . When the rear cover 17 is self-locked, the pin 29 passes through the through hole 26 from the sleeve body 23 and is locked on the outer side of the rear cover 17 .

[0068] On the inner wall of the sleeve body 23 close to the abutment plate 24, there are multiple sets of limit blocks 27 arranged in a ring, which cooperate with the abutment blocks 32 on the locating pin to prevent the locating pin from rotating in the sleeve, thereby causing the loss of the self-locking function (a concave-convex structure that is plugged into each other is formed between the limit block 27 and the abutment block 32, thereby realizing the anti-rotation function of the locating pin).

[0069] The positioning pin is inserted into the sliding sleeve body 23 to complete the self-locking of the rear cover 17. Fig.10 As shown, the positioning pin includes a pin plate 28, a pin column 29, a pin ball 30, a pin groove 31 and a stop block 32. The pin plate 28 is inserted into the sleeve body 23, and the stop block 32 is integrally connected to the outer side of the pin plate 28 and cooperates with the limit block 27. The limit block 27 and the stop block 32 form a mutually plugged concave-convex structure, thereby realizing the anti-rotation function of the positioning pin.

[0070] The pin 29 is integrally connected to one side of the pin plate 28 and is inserted into the through hole 26. The pin ball 30 is integrally connected to one end of the pin 29 away from the pin plate 28 and is hemispherical. Figure 2 As shown, after the rear cover 17 is pressed downward into the pressing groove 5, it will gradually contact the arc-shaped outer peripheral surface of the pin ball 30, thereby pushing the positioning pin outward. When the rear cover 17 is pressed into the appropriate position, the positioning pin pops out until the pin groove 31 is stuck on the clamping strip 22 of the rear cover 17, completing the self-locking of the rear cover 17.

[0071] like Fig.11 As shown, since the limit block 27 and the stop block 32 form a concave-convex structure that is plugged into each other, the anti-rotation function of the positioning pin is realized. Therefore, when the rear cover 17 is pressed downward, the positioning pin will not rotate, ensuring that the pin groove 31 is smoothly inserted into the card strip 22 to complete self-locking. Otherwise, the rotation of the positioning pin will cause the pin groove 31 to rotate. At this time, the pin groove 31 cannot be smoothly inserted into the card strip 22, and the self-locking function is lost.

[0072] The elastic force adjustment member includes an adjustment spring 33 and a plug 34 to realize the elastic expansion and contraction of the positioning pin, thereby cooperating with the elastic pressure member to complete self-locking and unlocking. The adjustment spring 33 is arranged in the sleeve body 23, and an internal thread is arranged on the inner side wall of the sleeve body 23 close to the second side surface, and the plug 34 is screwed in from the second side surface of the sleeve body 23.

[0073] The two sides of the adjusting spring 33 are respectively pressed between the pin plate 28 and the plug 34. After the rear cover 17 is pressed downward into the pressing groove 5, it will gradually contact the arc-shaped outer peripheral surface of the pin ball 30, thereby pushing the positioning pin outward until the adjusting spring 33 is compressed and deformed; when the rear cover 17 is pressed into a suitable position, the positioning pin is popped out under the resetting action of the adjusting spring 33, until the pin groove 31 is stuck on the clamping strip 22 of the rear cover 17, completing the self-locking of the rear cover 17.

[0074] By adjusting the screwing depth of the plug 34 , the compression amount of the adjustment spring 33 can be changed, thereby changing the elastic force of the adjustment spring 33 to achieve the adjustment of different self-locking forces.

[0075] The working principle of the battery welding positioning mechanism of the utility model is as follows:

[0076] During actual welding, the cover plate 7 is pressed against the second side surface of the jig shell 1, and the position of the cover plate 7 is adjusted until the outer fixing hole 8 is aligned with the inner fixing hole 4, and then the cover plate 7 and the jig shell 1 are fixed by tightening the bolts 11, at which time a structure with one end open and the other end closed is formed (i.e., the first side surface of the jig shell 1 is open), and at the same time, the elastic pin is inserted into the pin hole 6;

[0077] The battery shell 12 to be welded is placed into the through groove 2 from the opening, and the battery shell 12 is positioned by the positioning groove 9, and then the battery coil core 13 to be welded is inserted into the battery shell 12 to complete the preliminary preparation work for welding;

[0078] After the elastic pressing member is pressed downward into the pressing groove 5, the rear cover 17 will gradually contact the arc-shaped outer peripheral surface of the pin ball 30, thereby pushing the positioning pin outward until the adjustment spring 33 is compressed and deformed; when the rear cover 17 is pressed into a suitable position, the positioning pin is ejected under the reset action of the adjustment spring 33 until the pin groove 31 is stuck on the clamping strip 22 of the rear cover 17, completing the self-locking of the rear cover 17;

[0079] The elastic pressing member is used to elastically press the battery shell 12 and the battery core 13 inserted together, which can not only ensure the effect of welding the battery shell 12 and the battery core 13 to avoid disconnection, but also avoid pressing an indentation on the end surface of the battery core 13;

[0080] After the battery shell 12 and the battery roll core 13 are welded through the welding hole 10, the back cover 17 is rotated more than 20° and the back cover 17 will pop out automatically, so that the welded battery product can be taken out (during the rotation process, the positioning pin will also be pushed outward until the adjustment spring 33 is compressed and deformed. When the pin groove 31 and the clamping strip 22 are offset, the back cover 17 can be taken out of the jig shell 1 due to the lack of restriction).

[0081] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An elastic pin, characterized in that it include: Sliding sleeve; A positioning pin, wherein the positioning pin is elastically mounted in the sliding sleeve; An elastic force adjusting member, wherein the elastic force adjusting member is elastically adjustable and arranged in the sliding sleeve and abuts against one side of the positioning pin; The sliding sleeve comprises a sliding sleeve body (23), a stop plate (24) integrally connected to one end of the sliding sleeve body (23), a through hole (26) penetrating the stop plate (24), and a limit block (27) arranged on the inner side wall of the sliding sleeve body (23); The positioning pin comprises a pin plate (28), a pin column (29) integrally connected to one side of the pin plate (28) and penetrating the through hole (26), and a stop block (32) integrally connected to the outer side of the pin plate (28); a concave-convex structure that is plugged into each other is formed between the stop block (32) and the limiting block (27) to limit the rotation of the positioning pin.

2. An elastic pin according to claim 1, characterized in that: The elastic force adjustment member comprises a plug (34) screwed on the other end of the sliding sleeve body (23) and an adjustment spring (33) arranged in the sliding sleeve body (23), and the adjustment spring (33) is respectively arranged between the pin plate (28) and the plug (34).

3. The elastic pin according to claim 1, characterized in that: The positioning pin also includes a pin ball (30) integrally connected to a side of the pin column (29) away from the pin plate (28) and a pin groove (31) provided in the pin ball (30).

4. A battery welding positioning mechanism, the battery comprising a battery shell (12) and a battery winding core (13) inserted into each other, characterized in that: It comprises the elastic pin as described in any one of claims 1-3.

5. A battery welding positioning mechanism according to claim 4, characterized in that: It also includes: A shell assembly, the shell assembly comprising a jig shell (1) and a through slot (2) penetrating the jig shell (1), the battery shell (12) being inserted into the through slot (2), and the battery coil core (13) being inserted into the battery shell (12); A cover plate (7), wherein the cover plate (7) is fixed on one side of the jig shell (1); An elastic pressing piece, the elastic pressing piece being pressed onto the other side of the jig shell (1) and pressing against the battery coil core (13); The elastic pin is inserted into the fixture shell (1) and is used for self-locking the elastic pressing piece.

6. A battery welding positioning mechanism according to claim 5, characterized in that: The housing assembly further comprises a pressing groove (5) provided on the other side of the jig shell (1) and a pin hole (6) provided on the inner wall of the pressing groove (5); the elastic pin is inserted into the pin hole (6), and the elastic pressing member is pressed into the pressing groove (5).

7. A battery welding positioning mechanism according to claim 6, characterized in that: The elastic pressing member comprises a rear cover (17) pressed into the pressing groove (5), a base (14) pressed against the battery coil core (13), and a pressing spring (16) arranged between the rear cover (17) and the base (14).

8. A battery welding positioning mechanism according to claim 7, characterized in that: The elastic pressing member further comprises a bayonet (21) arranged around the outside of the rear cover (17) and a clamping strip (22) arranged between adjacent bayonet (21), and the positioning pin cooperates with the clamping strip (22) to achieve self-locking of the elastic pressing member.

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