Battery welding tension test fixture

Abstract

The utility model relates to the technical field of battery detection equipment, in particular to a battery welding tension test fixture. The battery welding tension test fixture comprises a first clamping structure and a second clamping structure, the first clamping structure can fill a cover plate and a tab in a first direction and limit and fix the cover plate and the tab in a second direction, and the second clamping structure and the first clamping structure are oppositely arranged in the second direction. The second clamping structure comprises a containing shell and two clamping pieces arranged oppositely, the containing shell is provided with a first containing cavity, the end, close to the first clamping structure in the second direction, of the first containing cavity is provided with a first opening communicated with the outside, and the two clamping pieces arranged oppositely are contained in the first containing cavity; a clamping space is formed between the two oppositely-arranged clamping pieces, the roll core stretches into the clamping space along the first opening, the two clamping pieces can move oppositely or oppositely, the first direction is perpendicular to the second direction, the measurement difficulty of the welding tension is reduced, and the measurement efficiency of the welding tension is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection equipment technical field especially relates to battery welding tension test fixture. BACKGROUND

[0002] As Figure 1 Shown, battery 2000 includes roll core 2300, tab 2200 and cover plate 2100, cover plate 2100 and tab 2200 are fixed together through the mode of laser welding.The welding strength between tab 2200 and cover plate 2100 determines the safety performance of battery 2000.The welding tension between tab 2200 and cover plate 2100 is the key index of judging whether the welding strength is qualified.

[0003] In the related art, for the welding tension test between tab 2200 and cover plate 2100, after tab 2200 and cover plate 2100 are welded together, first, tab 2200 is cut off from roll core 2300, then cover plate 2100 is clamped on the specially-made fixing fixture, the free end formed by clamping and fixing tab 2200 after cutting is clamped by the jaw of tension tester, tab 2200 is pulled by tension tester to measure the welding tension.But the above-mentioned measurement mode of welding tension needs to cut tab 2200 from roll core 2300 first.Cutting tab 2200 from roll core 2300 not only wastes time, but also easily damages the welding point between tab 2200 and cover plate 2100, which affects the normal measurement of subsequent welding tension.In addition, due to the compact structure of battery 2000, the size of exposed tab 2200 is very small, when clamping and fixing tab 2200 by the jaw of tension tester, the jaw is easy to pull off tab 2200, and the clamping and fixing of jaw and tab 2200 need to be repeated, which further reduces the measurement efficiency.

[0004] Therefore, it is urgent to invent battery welding tension test fixture to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing battery welding tension test fixture to realize the clamping and fixing of tab and cover plate in different specifications of battery separately, reduce the measurement difficulty of welding tension, and improve the measurement efficiency and measurement accuracy of welding tension.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] The battery welding tension test fixture comprises:

[0008] The first clamping structure can clamp and fix the cover plate and the tab along the first direction and limit the cover plate and the tab along the second direction; and

[0009] A second clamping structure is disposed opposite to the first clamping structure along the second direction, and includes a receiving shell and two clamping members disposed opposite to each other. The receiving shell has a first receiving cavity, and an opening of the first receiving cavity near one end of the first receiving cavity along the second direction is open to the outside. The two clamping members are disposed in the first receiving cavity, and a clamping space is formed between the two clamping members. The winding core extends into the clamping space along the opening. The two clamping members can move towards or away from each other, and the first direction is perpendicular to the second direction.

[0010] As an option, the second clamping structure further includes:

[0011] A driving member is disposed in the receiving shell along the direction opposite to the two clamping members, and the output end of the driving member penetrates through the penetrating hole and abuts against the clamping member. The driving member can move along the direction opposite to the two clamping members, so that the two clamping members move towards each other.

[0012] As an option, the second clamping structure has two driving members, and each clamping member is disposed corresponding to one driving member.

[0013] As an option, the clamping member is provided with an abutting groove at one end of the clamping member away from the other clamping member along the direction opposite to the two clamping members. The abutting groove is inserted and fixed with the output end of the driving member.

[0014] As an option, the driving member includes:

[0015] A screwing part; and

[0016] A penetrating part extending along the direction opposite to the two clamping members. One end of the penetrating part is connected with the screwing part. The outer peripheral wall of the penetrating part is provided with external threads. The penetrating hole is provided with internal threads matched with the external threads. The screwing part is configured to drive the penetrating part to rotate along the axial direction of the penetrating part.

[0017] As an option, the driving member further includes:

[0018] An elastic buffer part is disposed at one end of the penetrating part away from the screwing part, and the elastic buffer part is inserted and fixed with the abutting groove.

[0019] As an option, the first clamping structure has a clamping through hole extending along a first direction, a second opening extending along the first direction is formed in the hole wall along a second direction of the clamping through hole, a third direction dimension of the clamping through hole is greater than or equal to a radial dimension of the cover plate, a third direction dimension of the second opening is less than the radial dimension of the cover plate, and the first direction, the second direction and the third direction are perpendicular to each other in space.

[0020] As an option, the first clamping structure is provided with a first docking groove extending along the second direction away from one end of the second opening along the second direction, a first fixing hole is arranged on the side wall of the first docking groove along the first direction and / or the third direction, the first fixing hole is in communication with the docking groove, the first clamping structure further comprises a first fixing member, the output end of the traction mechanism is provided with a first locking hole, in the state that the output end of the traction mechanism extends into the first docking groove, the first fixing hole is coaxially communicated with the first locking hole, and the first fixing member is locked and fixed with the first fixing hole and the first locking hole in sequence.

[0021] As an option, two opposite end faces of the clamping member are respectively provided with clamping grooves, and two clamping grooves jointly form a matching cavity which is matched with the outer peripheral wall of the winding core along the second direction.

[0022] As an option, the second clamping structure further comprises:

[0023] The elastic member extends along the opposite direction of the two clamping members, one end of the elastic member is connected with the cavity wall of the first accommodating cavity, and the other end of the elastic member is connected with the clamping member.

[0024] The utility model discloses beneficial effects:

[0025] The battery welding tension test clamp provided by the utility model has the advantages that the cover plate and the tab are filled along the first direction in the first clamping structure, and the cover plate and the tab are limitingly fixed along the second direction, clamping and fixing of the cover plate and the tab are realized, the second clamping structure is arranged opposite to the first clamping structure along the second direction, the first containing cavity for containing two oppositely arranged clamping pieces is arranged in the containing shell in the second clamping structure, and the first open mouth in communication with the outside is arranged at the end of the first containing cavity close to the first clamping structure along the second direction, the roll core is stretched into the clamping space formed by the two oppositely arranged clamping pieces along the first open mouth, the clamping and fixing of the roll core by the two oppositely arranged clamping pieces can be realized by the opposite movement and the opposite movement of the two clamping pieces, and then the separate clamping and fixing of the cover plate and the roll core are realized, when the welding tension between the cover plate and the tab needs to be measured, the first clamping structure and the second clamping structure only need to be pulled along the second direction, the tab does not need to be cut off from the roll core, the measurement difficulty of the welding tension is reduced, the measurement efficiency of the welding tension is improved, and the measurement precision of the welding tension is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structure schematic view of the battery provided by the utility model embodiment one;

[0027] Figure 2 is a structure schematic view of the first clamping structure provided by the utility model embodiment one;

[0028] Figure 3 is a cross section schematic view of the first clamping structure provided by the utility model embodiment one;

[0029] Figure 4 is a structure schematic view of the second clamping structure provided by the utility model embodiment one;

[0030] Figure 5 is a structure schematic view of the containing shell provided by the utility model embodiment one;

[0031] Figure 6 is a cross section schematic view of the containing shell provided by the utility model embodiment one;

[0032] Figure 7 is a structure schematic view of the clamping piece provided by the utility model embodiment one;

[0033] Figure 8 is a structure schematic view of the driving piece provided by the utility model embodiment one;

[0034] Figure 9 is a cross section schematic view of the second clamping structure provided by the utility model embodiment two.

[0035] In the drawing:

[0036] 100, first clamping structure; 110, clamping through hole; 111, second opening; 120, first butt groove; 130, first fixing hole;

[0037] 200, second clamping structure; 210, clamping piece; 211, clamping groove; 212, abutting groove; 220, accommodating shell; 221, first accommodating cavity; 2211, first opening; 222, through hole; 223, second butt groove; 224, second fixing hole; 230, driving piece; 231, through part; 232, screwing part; 233, elastic buffering part; 240, elastic piece;

[0038] 2000, battery; 2100, cover plate; 2200, tab; 2300, winding core. DETAILED DESCRIPTION

[0039] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model will be further explained below in combination with the drawings and through specific embodiments.

[0040] In the description of the utility model, unless there is definite provision and limitation, the terms "connection", "connecting", "fixing" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements or interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0041] In the utility model, unless there is definite provision and limitation, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper side" and "upper surface" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "lower", "lower side" and "lower surface" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0043] Embodiment one

[0044] As shown in Figure 1 The battery 2000 includes a winding core 2300, a tab 2200, and a cover plate 2100, and the cover plate 2100 and the tab 2200 are fixed together by laser welding. The welding tension between the tab 2200 and the cover plate 2100 is a key indicator for determining whether the welding strength is qualified. For the test of the welding tension between the tab 2200 and the cover plate 2100, after the tab 2200 and the cover plate 2100 are welded together, the tab 2200 and the winding core 2300 are first cut off, then the cover plate 2100 is clamped on a special fixture, the free end formed after the tab 2200 is cut is clamped and fixed by the clamping jaw of the tension tester, and the tab 2200 is pulled by the tension tester to measure the welding tension. However, the above-mentioned welding tension measurement method needs to cut the tab 2200 from the winding core 2300 of the battery 2000 first. Cutting the tab 2200 from the winding core 2300 not only wastes time, but also easily damages the welding point between the tab 2200 and the cover plate 2100, affecting the normal measurement of the subsequent welding tension. In addition, due to the compact structure of the battery 2000, the size of the exposed tab 2200 is very small, and when the clamping jaw of the tension tester clamps and fixes the tab 2200, the clamping jaw is easy to pull off the tab 2200, and the clamping and fixing of the clamping jaw and the tab 2200 need to be repeated, which further reduces the measurement efficiency.

[0045] In order to solve the above-mentioned problems, as shown in Figures 2 to 6As shown, the embodiment provides a battery welding tensile test fixture. The battery welding tensile test fixture comprises a first clamping structure 100 and a second clamping structure 200, wherein the first clamping structure 100 is capable of loading the cover plate 2100 and the tab 2200 along a first direction and limiting the cover plate 2100 and the tab 2200 along a second direction, the second clamping structure 200 is oppositely arranged with the first clamping structure 100 along the second direction, the second clamping structure 200 comprises a containing shell 220 and two oppositely arranged clamping pieces 210, the containing shell 220 has a first containing cavity 221, the first containing cavity 221 is provided with a first opening 2211 communicated with the outside at one end close to the first clamping structure 100 along the second direction, the two oppositely arranged clamping pieces 210 are contained in the first containing cavity 221, and a clamping space is formed between the two oppositely arranged clamping pieces 210, the roll core 2300 extends into the clamping space along the first opening 2211, and the two oppositely arranged clamping pieces 210 are capable of moving towards each other or moving away from each other, the first direction and the second direction are perpendicular to each other in space.

[0046] The battery welding tensile test fixture loads the cover plate 2100 and the tab 2200 along the first direction in the first clamping structure 100 and limits the cover plate 2100 and the tab 2200 along the second direction, thereby achieving clamping and fixing of the cover plate 2100 and the tab 2200, oppositely arranging the second clamping structure 200 with the first clamping structure 100 along the second direction, arranging the first containing cavity 221 for containing the two oppositely arranged clamping pieces 210 in the containing shell 220 of the second clamping structure 200, and arranging the first opening 2211 communicated with the outside at one end of the first containing cavity 221 close to the first clamping structure 100 along the second direction, so that the roll core 2300 extends into the clamping space formed by the two oppositely arranged clamping pieces 210 along the first opening 2211, in combination with the moving towards each other and the moving away from each other of the two oppositely arranged clamping pieces 210, the clamping and fixing of the roll core 2300 by the two oppositely arranged clamping pieces 210 can be achieved, thereby achieving separate clamping and fixing of the cover plate 2100 and the roll core 2300, when the welding tensile force between the cover plate 2100 and the tab 2200 needs to be measured, only the first clamping structure 100 and the second clamping structure 200 need to be pulled along the second direction, without the need to cut the tab 2200 from the roll core 2300, which not only reduces the measurement difficulty of the welding tensile force, improves the measurement efficiency of the welding tensile force, but also improves the measurement accuracy of the welding tensile force. Understandably, the structural strength between the tab 2200 and the roll core 2300 is much greater than the welding strength between the tab 2200 and the cover plate 2100, so the welding tensile test between the tab 2200 and the cover plate 2100 is performed without cutting the tab 2200 and the roll core 2300, and the cover plate 2100 and the tab 2200 always break first.

[0047] Specifically, as Figure 2 andFigure 3 As shown, the first clamping structure 100 has a clamping through hole 110 extending along a first direction, the clamping through hole 110 is provided with a second opening 111 extending along the first direction on the hole wall along a second direction, the size of the clamping through hole 110 along a third direction is greater than or equal to the radial size of the cover plate 2100, the size of the second opening 111 along the third direction is less than the radial size of the cover plate 2100, and the first direction, the second direction and the third direction are perpendicular to each other in space. When it is needed to load the cover plate 2100 and the tab 2200 on the first clamping structure 100, first, the cover plate 2100 and the tab 2200 are respectively aligned with the clamping through hole 110 and the second opening 111 along the first direction, and the cover plate 2100 and the tab 2200 are driven to move relative to the clamping through hole 110 and the second opening 111 along the first direction, so that the cover plate 2100 enters the clamping through hole 110 and the tab 2200 enters the second opening 111, to complete the loading of the cover plate 2100 and the tab 2200 on the first clamping structure 100 along the first direction.

[0048] It should be noted that in the embodiment, the radial size of the cover plate 2100 is 40mm, the size of the clamping through hole 110 along the third direction is 45mm, and the size of the second opening 111 along the third direction is 10mm, when the cover plate 2100 and the tab 2200 are loaded on the first clamping structure 100 along the first direction, the cover plate 2100 is clamped and fixed in the clamping through hole 110 along the second direction. In other embodiments, the size of the clamping through hole 110 along the third direction and the size of the second opening 111 along the third direction can be adaptively adjusted according to the specific radial size of the cover plate 2100, and the embodiment is not limited specifically.

[0049] In addition, in the embodiment, the first direction is the front-back direction, the second direction is the up-down direction, and the third direction is the left-right direction. In other embodiments, the specific directions of the first direction, the second direction and the third direction can be adaptively adjusted according to actual needs, as long as the first direction, the second direction and the third direction are perpendicular to each other in space.

[0050] After the clamping and positioning of the cover plate 2100 and the tab 2200 by the first clamping structure 100 is completed, the first clamping structure 100 needs to be pulled by the traction mechanism in the second direction. To improve the docking efficiency of the traction mechanism and the first clamping structure 100, the first clamping structure 100 is provided with a first docking groove 120 extending in the second direction at an end thereof away from the second opening 111 in the second direction. The first docking groove 120 is provided with a first fixing hole 130 on the side wall thereof in the first direction and / or the third direction. The first fixing hole 130 is in communication with the first docking groove 120. The first clamping structure 100 further comprises a first fixing member. The output end of the traction mechanism is provided with a first locking hole. In the state that the output end of the traction mechanism extends into the first docking groove 120, the first fixing hole 130 is coaxially communicated with the first locking hole. The first fixing member is locked and fixed with the first fixing hole 130 and the first locking hole in sequence. By providing the first docking groove 120 at the end of the first clamping structure 100 away from the second opening 111 in the second direction, and providing the first fixing hole 130 on the side wall of the first docking groove 120 in the first direction, when the output end of the traction mechanism extends into the first docking groove 120, the first fixing hole 130 is coaxially communicated with the first locking hole on the output end of the traction mechanism, and the first fixing member in the first clamping structure 100 is locked and fixed with the first fixing hole 130 and the first locking hole in sequence, so as to complete the rapid assembly and docking of the traction mechanism and the first clamping structure 100. It should be noted that in the present embodiment, the first fixing member is a bolt, the first fixing hole 130 and the first locking hole are threaded holes, and the bolt is threadedly fixed with the first fixing hole 130 and the first locking hole in sequence.

[0051] In other embodiments, a plurality of first fixing holes 130 can be provided on the side wall of the first docking groove 120 in the first direction, and a plurality of first locking holes can be provided on the output end of the traction mechanism, so that each first fixing hole 130 is correspondingly provided with a first locking hole and a first fixing member. The present embodiment is not limited in particular.

[0052] In addition, in other embodiments, the first fixing hole 130 can be provided on the side wall of the first docking groove 120 in the third direction, or the first fixing hole 130 can be provided on the side wall of the first docking groove 120 in the first direction and the third direction at the same time, so that each first fixing hole 130 is correspondingly provided with a first locking hole and a first fixing member.

[0053] As an optional solution, as Figure 4 , Figure 5 and Figure 6As shown, the second clamping structure 200 further comprises a driving member 230, wherein the accommodating shell 220 is provided with a through hole 222 in the direction opposite to the two clamping members 210, the output end of the driving member 230 penetrates through the through hole 222 and abuts against the clamping member 210, and the driving member 230 is movable in the direction opposite to the two clamping members 210 to move the two clamping members 210 towards each other. When the second clamping structure 200 is needed to clamp and fix the roll core 2300, first, the two oppositely arranged clamping members 210 are separated from each other, then the roll core 2300 is put into the clamping space between the two clamping members 210 along the first opening 2211, and then the driving member 230 is driven to move the two clamping members 210 towards each other after the output end of the driving member 230 penetrates into the first accommodating cavity 221 from the outside of the accommodating shell 220 through the through hole 222 and abuts against one clamping member 210, so as to clamp and fix the roll core 2300 in the clamping space.

[0054] In order to improve the abutting stability of the driving member 230 and the clamping member 210, as shown in Figure 7 As shown, the clamping member 210 is provided with an abutting groove 212 at one end thereof in the direction opposite to the other clamping member 210, and the output end of the driving member 230 is inserted and fixed in the abutting groove 212. After the output end of the driving member 230 penetrates into the first accommodating cavity 221 through the through hole 222, the output end of the driving member 230 is inserted and fixed in the abutting groove 212 on the clamping member 210, which solves the problem of deviation of the abutting between the output end of the driving member 230 and the clamping member 210, and ensures the driving accuracy of the driving member 230 to the clamping member 210.

[0055] As an optional solution, as shown in Figure 7 As shown, the two clamping members 210 are respectively provided with clamping grooves 211 at the two opposite ends thereof, and the two clamping grooves 211 jointly form a matching cavity which is matched with the outer peripheral wall of the roll core 2300 in the second direction, so as to further improve the clamping and fixing effect of the roll core 2300. It should be noted that in the embodiment, the roll core 2300 is in a cylindrical shape, and therefore the clamping groove 211 is an arc-shaped groove matched with the outer peripheral wall of the roll core 2300.

[0056] In combination with Figure 8The specific structure of the driving member 230 is described as follows. The driving member 230 comprises a screwing portion 232 and a penetrating portion 231. The penetrating portion 231 extends in the direction opposite to the two clamping members 210. One end of the penetrating portion 231 is connected to the screwing portion 232. The outer circumferential wall of the penetrating portion 231 is provided with external threads. The penetrating hole 222 is provided with internal threads matched with the external threads. The screwing portion 232 is configured to drive the penetrating portion 231 to rotate along the axial direction of the penetrating portion 231. By providing the external threads on the outer circumferential wall of the penetrating portion 231 along the axial direction and providing the internal threads matched with the external threads on the penetrating hole 222, when it is needed to drive the driving member 230 to abut against the clamping member 210 and drive the two clamping members 210 to clamp and fix the winding core 2300, the screwing portion 232 is operated to rotate around the axial direction of the penetrating portion 231, which drives the penetrating portion 231 to rotate around the axial direction of the penetrating portion 231. In combination with the thread matching of the external threads and the internal threads, the penetrating portion 231 can move in the direction opposite to the two clamping members 210, thereby inserting and fixing the penetrating portion 231 in the abutting groove 212 in the clamping member 210 and driving the two clamping members 210 to move towards each other.

[0057] In addition, the thread matching between the penetrating portion 231 and the penetrating hole 222 can not only improve the movement accuracy of the penetrating portion 231, but also realize the automatic locking of the penetrating portion 231 and the penetrating hole 222 along the axial direction of the penetrating portion 231, thereby ensuring the clamping effect of the two clamping members 210 on the winding core 2300. It should be noted that in the embodiment, the screwing portion 232 is a straight rod, and the axial direction of the screwing portion 232 is perpendicular to the axial direction of the penetrating portion 231, so as to facilitate the gripping of the screwing portion 232.

[0058] In an optional solution, the driving member 230 further comprises an elastic buffer portion 233. The elastic buffer portion 233 is arranged at one end of the penetrating portion 231 away from the screwing portion 232 and is inserted and fixed in the abutting groove 212. By arranging the elastic buffer portion 233 at one end of the penetrating portion 231 away from the screwing portion 232, when the penetrating portion 231 is inserted and fixed in the abutting groove 212 in the clamping member 210, the elastic buffer portion 233 can be clamped between the penetrating portion 231 and the groove wall of the abutting groove 212, thereby avoiding the direct contact between the penetrating portion 231 and the groove wall of the abutting groove 212 and improving the protection of the penetrating portion 231 and the abutting groove 212. It should be noted that in the embodiment, the elastic buffer portion 233 is made of rubber material. The rubber material has good elasticity, toughness and wear resistance and has a long service life. In other embodiments, the elastic buffer portion 233 can also be made of sponge, cotton or other elastic materials, and the embodiment is not limited in a specific manner.

[0059] In the embodiment, as shown in Figure 4As shown, the second clamping structure 200 has two driving members 230, and each clamping member 210 is arranged in correspondence with one driving member 230, so that the two clamping members 210 can move relative to the accommodating shell 220, and the two clamping members 210 can be coaxially arranged with the first opening 2211 in the accommodating shell 220, which can improve the clamping aesthetics of the roll core 2300 on the second clamping structure 200.

[0060] When the welding tension test of the cover plate 2100 and the tab 2200 is performed, the first clamping structure 100 and the second clamping structure 200 need to be connected by the traction mechanism after the cover plate 2100 and the tab 2200 are clamped and fixed by the first clamping structure 100 and the roll core 2300 is clamped and fixed by the second clamping structure 200. In order to improve the docking efficiency of the traction mechanism and the second clamping structure 200, as shown in the figure, Figure 3 As shown, the accommodating shell 220 is provided with a second docking groove 223 extending in the second direction at one end away from the first opening 2211, and the side wall of the second docking groove 223 along the first direction or the third direction is provided with a second fixing hole 224 in communication. The output end of the traction mechanism is provided with a second locking hole, and the second clamping structure 200 further comprises a second fixing member. When the output end of the traction mechanism extends into the second docking groove 223, the second fixing hole 224 and the second locking hole are coaxially communicated, and the second fixing member is locked and fixed with the second fixing hole 224 and the second locking hole in sequence. It should be noted that in this embodiment, the second fixing hole 224 is arranged on the side wall of the second docking groove 223 along the first direction, the second fixing member is a bolt, and the second fixing hole 224 and the second locking hole are both threaded holes. The bolt is threadedly fixed with the second fixing hole 224 and the second locking hole in sequence.

[0061] In other embodiments, a plurality of second fixing holes 224 can be arranged on the side wall of the second docking groove 223 along the first direction or the third direction. It is only necessary to ensure that each second fixing hole 224 is arranged in correspondence with one second locking hole and one second fixing member. This embodiment is not limited in particular.

[0062] Embodiment Two

[0063] The embodiment provides a battery welding tension test clamp. The specific structure of the battery welding tension test clamp provided in the embodiment is basically the same as that of embodiment one. The battery welding tension test clamp provided in the embodiment is different from that of embodiment one in that the structure for driving the two clamping members 210 to move towards each other is different.

[0064] Specifically, as shown in the figure, Figure 9As shown, the second clamping structure 200 provided by the embodiment does not include the driving member 230 provided in the first embodiment, and the second clamping structure 200 provided by the embodiment includes an elastic member 240, wherein the elastic member 240 extends in the opposite direction of the two clamping members 210, one end of the elastic member 240 is connected with the cavity wall of the first accommodating cavity 221, and the other end of the elastic member 240 is connected with the groove wall of the abutting groove 212 in the clamping member 210. By arranging the elastic member 240 extending in the opposite direction of the clamping member 210 between the abutting groove 212 and the first accommodating cavity 221, the two clamping members 210 can be driven to move oppositely by the elastic member 240, and the driving step of the clamping member 210 is further simplified.

[0065] It should be noted that in the embodiment, the elastic member 240 is always in a compressed state, and the initial state of the two clamping members 210 is the state of abutting each other. When it is needed to clamp and fix the roll core 2300, the two clamping members 210 need to be driven to move away from each other first, at this time, the elastic member 240 is compressed again, after a certain clamping space is formed between the two clamping members 210, the roll core 2300 is placed in the clamping space, then the two clamping members 210 are loosened, the elastic member 240 is reset under the action of its own elasticity, so as to drive the two clamping members 210 to move towards each other, and then clamp and fix the roll core 2300 located in the clamping space, so as to further simplify the clamping step of the roll core 2300. It should be noted that in the embodiment, the elastic member 240 is a spring. The spring structure is simple and convenient to disassemble and assemble. In other embodiments, the elastic member 240 can also be other elastic structures, and the embodiment is not limited specifically.

[0066] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A battery weld pull test fixture characterized by, The utility model relates to a kind of battery tab clamping structure, including: First clamping structure (100) can be filled along first direction cover plate (2100) with tab (2200) and limit fixing the cover plate (2100) with the tab (2200) along second direction;And Second clamping structure (200) is oppositely arranged with the first clamping structure (100) along the second direction, and the second clamping structure (200) includes accommodating shell (220) and oppositely arranged two clamping pieces (210), the accommodating shell (220) has first accommodating cavity (221), and the first accommodating cavity (221) is opened with first opening (2211) that is communicated with outside in one end close to the first clamping structure (100) along the second direction, and oppositely arranged two clamping pieces (210) are accommodated in the first accommodating cavity (221), and clamping space is formed between oppositely arranged two clamping pieces (210), and roll core (2300) extends into the clamping space along the first opening (2211), and two clamping pieces (210) can move towards each other or move away from each other, and the first direction and the second direction are perpendicular to each other.

2. The battery weld pull test fixture of claim 1, wherein, The second clamping structure (200) further includes: Driving member (230), the accommodating shell (220) is provided with through hole (222) along the direction opposite to two clamping pieces (210), the output end of the driving member (230) passes through the through hole (222) and is abutted with the clamping piece (210), and the driving member (230) can be moved along the direction opposite to two clamping pieces (210) to make two clamping pieces (210) move towards each other.

3. The battery weld pull test fixture of claim 2, wherein, Two driving members (230) are arranged in the second clamping structure (200), and each clamping piece (210) is correspondingly arranged with a driving member (230).

4. The battery weld pull test fixture of claim 2, wherein, The clamping piece (210) is provided with abutment groove (212) in one end away from another clamping piece (210) along the direction opposite to two clamping pieces (210), and the abutment groove (212) is inserted and fixed with the output end of the driving member (230).

5. The battery weld pull test fixture of claim 4, wherein, The driving member (230) includes: Screw part (232);And Through part (231), the through part (231) extends along the direction opposite to two clamping pieces (210), one end of the through part (231) is connected with the screw part (232), and the outer peripheral wall of the through part (231) is provided with external thread, the through hole (222) is provided with internal thread matched with the external thread, and the screw part (232) is configured to drive the through part (231) to rotate along the axial direction of the through part (231).

6. The battery weld pull test fixture of claim 5, wherein, The driving member (230) further includes: Elastic buffer part (233), arranged in one end of the through part (231) away from the screw part (232), and the elastic buffer part (233) is inserted and fixed with the abutment groove (212).

7. The battery weld pull test fixture of any one of claims 1-6, wherein, The first clamping structure (100) has a clamping through hole (110) extending along a first direction, the clamping through hole (110) is provided with a second opening (111) extending along the first direction on the hole wall along a second direction, the size of the clamping through hole (110) along a third direction is greater than or equal to the radial size of the cover plate (2100), the size of the second opening (111) along the third direction is less than the radial size of the cover plate (2100), and the first direction, the second direction and the third direction are perpendicular to each other in space.

8. The battery weld pull test fixture of claim 7, wherein, The first clamping structure (100) is provided with a first butt joint groove (120) extending along the second direction away from one end of the second opening (111) along the second direction, the first butt joint groove (120) is provided with a first fixing hole (130) on the side wall along the first direction and / or the third direction, the first fixing hole (130) is communicated with the butt joint groove (120), the first clamping structure (100) further comprises a first fixing member, the output end of the traction mechanism is provided with a first locking hole, in the state that the output end of the traction mechanism extends into the first butt joint groove (120), the first fixing hole (130) is coaxially communicated with the first locking hole, and the first fixing member is locked and fixed with the first fixing hole (130) and the first locking hole in sequence.

9. The battery weld pull test fixture of any one of claims 1-6, wherein, The opposite two end faces of the two clamping members (210) are respectively provided with clamping grooves (211), and the two clamping grooves (211) jointly enclose a matching cavity, the matching cavity is matched with the outer peripheral wall of the core (2300) along the second direction.

10. The battery weld pull test fixture of any one of claims 1-6, wherein, The second clamping structure (200) further comprises: An elastic member (240) extends along the opposite direction of the two clamping members (210), one end of the elastic member (240) is connected with the cavity wall of the first accommodating cavity (221), and the other end of the elastic member (240) is connected with the clamping member (210).

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