Chip welding tool

Abstract

The utility model relates to a chip welding tool which comprises a base and a chip clamping mechanism. When the chip is welded, the cylindrical battery can be placed in the accommodating cavity of the base, and then the chip clamping mechanism is mounted on the base, so that the cylindrical battery is positioned by the pressing plate. Then, the positive pole piece and the negative pole piece are inserted along the first sliding groove and the second sliding groove respectively until the positive pole piece and the negative pole piece slide to the avoiding structure and abut against the welding position of the cylindrical battery. And at the moment, the positive pole piece and the negative pole piece can be respectively welded at the corresponding welding positions of the cylindrical battery by welding through the avoiding structure. Due to the fact that the elastic pressing and holding assembly can press and hold the positive pole piece and the negative pole piece in the first sliding groove and the second sliding groove, the relative positions of the positive pole piece and the negative pole piece and the cylindrical battery in the containing cavity are kept stable, the positive pole piece and the negative pole piece are not prone to dislocation or separation from the cylindrical battery in the welding process, and the piece welding effect can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a bar welding tool. Background Art

[0002] Cylindrical batteries need to undergo electrical performance testing during the development process, and before being sent for testing, tabs need to be welded to the positive (pole) and negative (shell) electrodes of the battery. At present, the conventional practice is to first perform adhesive insulation treatment on the battery to be tested, then use tape to bond and fix the positive and negative tabs, and finally weld the tabs. Due to the smooth surface of the tabs, the bonded positive and negative tabs are easily separated from the pole or shell during the welding process, resulting in cold soldering or even desoldering. Utility Model Content

[0003] Based on this, it is necessary to provide a bar welding tool that can improve the bar welding effect in order to solve the above problems.

[0004] A bar welding tool, comprising:

[0005] A base having a receiving cavity for receiving a cylindrical battery; and

[0006] The clamping mechanism of the battery sheet includes a pressing plate and an elastic pressing component. The pressing plate is detachably mounted on the base and presses the cylindrical battery in the accommodating cavity. The pressing plate is formed with a avoiding structure for exposing the welding position of the cylindrical battery. The elastic pressing component is mounted on a side of the pressing plate facing away from the accommodating cavity, and forms a first slide groove and a second slide groove extending to the avoiding structure between the pressing plate and the elastic pressing component.

[0007] Among them, the positive electrode tab and the negative electrode tab can slide along the first slide groove and the second slide groove to the avoidance structure and abut against the welding position of the cylindrical battery, and the elastic pressing component can generate an elastic pre-tightening force to press the positive electrode tab and the negative electrode tab into the first slide groove and the second slide groove respectively.

[0008] In one embodiment, the base includes a bottom plate and two columns, a circular pit is formed on the surface of the bottom plate, a semicircular groove is formed on one side of each column, the two columns are detachably mounted on the bottom plate relative to each other, and the accommodating cavity is formed between the circular pit and the two semicircular grooves.

[0009] In one embodiment, the avoidance structure includes a first avoidance groove exposing the pole of the cylindrical battery and a second avoidance groove exposing the shell of the cylindrical battery, the first slide groove and the second slide groove extend to the first avoidance groove and the second avoidance groove respectively, and a partition is formed on the surface of the pressure plate facing away from the accommodating cavity, and the partition is located between the first avoidance groove and the second avoidance groove, and the positive electrode tab and the negative electrode tab can slide along the first slide groove and the second slide groove until they abut against the partition.

[0010] In one embodiment, the positive electrode tab and the negative electrode tab squeeze the elastic pressing component while passing through the first slide groove and the second slide groove, and the elastic pressing component generates an elastic pre-tightening force that presses the positive electrode tab and the negative electrode tab into the first slide groove and the second slide groove, respectively.

[0011] In one embodiment, the elastic pressing assembly includes a tab fixing block, an elastic member and a supporting member. The tab fixing block is installed on the side of the pressure plate facing away from the accommodating cavity, and forms the first slide groove and the second slide groove between the tab fixing block and the pressure plate. The supporting member is at least partially located in the first slide groove and the second slide groove. The positive tab and the negative tab squeeze the supporting member and force the elastic member to undergo elastic deformation in the process of passing through the first slide groove and the second slide groove, so as to generate an elastic pre-tightening force to press the positive tab and the negative tab in the first slide groove and the second slide groove, respectively.

[0012] In one embodiment, the elastic pressing assembly also includes a spring plate, which is installed on the side of the bar fixing block facing away from the pressure plate, and the bar fixing block is provided with a ball hole extending through the thickness direction, and the supporting member is configured as a ball and accommodated in the ball hole, and the elastic member is configured as a spring, one end of the spring abuts against the spring plate, and the other end abuts against the ball and causes the ball portion to extend out of the ball hole close to the pressure plate.

[0013] In one embodiment, at least two ball holes are formed in the area corresponding to the first slide groove of the bar fixing block, and at least two ball holes are formed in the area corresponding to the second slide groove of the bar fixing block, and the ball is disposed in each ball hole.

[0014] In one embodiment, a mounting hole is formed on a side of the spring plate facing the bar fixing block, a positioning column is disposed in the mounting hole, and one end of the spring is received in the mounting hole and sleeved on the positioning column.

[0015] In one embodiment, the middle parts of the bar fixing block and the spring plate are disconnected to expose the avoidance structure.

[0016] In one embodiment, two of the bar clamping mechanisms are provided, the two bar clamping mechanisms are arranged opposite to each other, and the avoidance structures, the first sliding grooves and the second sliding grooves of the two bar clamping mechanisms are connected to each other.

[0017] The above-mentioned bar-piece welding tool can first place the cylindrical battery in the accommodating cavity when performing bar-piece welding, and then install the bar-piece clamping mechanism on the base so that the pressure plate can position the cylindrical battery. Then, insert the positive bar piece and the negative bar piece along the first slide groove and the second slide groove respectively, until the positive bar piece and the negative bar piece slide to the avoidance structure and abut against the welding position of the cylindrical battery. At this time, the positive bar piece and the negative bar piece can be welded to the corresponding welding positions of the cylindrical battery by welding through the avoidance structure. Since the elastic pressing component can press the positive bar piece and the negative bar piece in the first slide groove and the second slide groove, thereby maintaining a stable relative position with the cylindrical battery in the accommodating cavity, the positive bar piece and the negative bar piece are not easy to be misplaced or separated from the cylindrical battery during the welding process, thereby effectively improving the effect of bar piece welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the assembly of the bar welding tool in a preferred embodiment of the utility model;

[0020] Figure 2 for Figure 1 The exploded view of the bar welding tooling shown;

[0021] Figure 3 for Figure 1 The structural schematic diagram of the bar clamping mechanism in the bar welding tool shown;

[0022] Figure 4 for Figure 3 The schematic diagram of the structure of the pressure plate in the clamping mechanism of the bar is shown;

[0023] Figure 5 for Figure 4 A schematic diagram of the structure on the back of the pressing plate shown;

[0024] Figure 6 for Figure 4 A front view of the pressure plate shown;

[0025] Figure 7 for Figure 1A top view of the bar welding tool shown;

[0026] Figure 8 for Figure 7 The cross-sectional view of the bar welding tool along AA is shown;

[0027] Fig. 9 for Figure 8 The enlarged schematic diagram of the local C in the bar welding tooling shown;

[0028] Fig.10 for Figure 8 The enlarged schematic diagram of the local D in the welding tooling of the bar piece is shown;

[0029] Fig.11 for Figure 7 The cross-sectional view of the bar welding tool along BB is shown;

[0030] Fig.12 for Fig.11 The enlarged schematic diagram of the local E in the bar welding tooling is shown. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0037] See also Figure 1 and Figure 2 The bar welding tool 10 in the preferred embodiment of the present invention includes a base 100 and a bar clamping mechanism 200 .

[0038] The base 100 is formed with a receiving cavity (not shown), the shape of which matches the outer contour of the cylindrical battery 20 and is also roughly cylindrical. When welding the tabs, the cylindrical battery 20 to be welded can be placed in the receiving cavity first, and the pole of the cylindrical battery 20 placed in the receiving cavity faces upward. The inner diameter of the receiving cavity is slightly larger than the outer diameter of the cylindrical battery 20, so that the cylindrical battery 20 can be smoothly taken in and out, and can play a good role in limiting the position of the cylindrical battery 20.

[0039] In this embodiment, the base 100 includes a bottom plate 110 and two columns 120. A circular pit 111 is formed on the surface of the bottom plate 110. A semicircular groove 121 is formed on one side of each column 120. The two columns 120 are detachably installed relative to the bottom plate 110, and a receiving cavity is formed between the circular pit 111 and the two semicircular grooves 121.

[0040] The circular pit 111 is used to place and position the cylindrical battery 20. The semicircular grooves 121 of the two columns 120 are arranged facing each other, so as to cooperate to form a circular hole that limits the large surface of the cylindrical battery 20. The column 120 and the bottom plate 110 can be detachably connected by screws. When necessary, the column 120 can be separated from the bottom plate 110, so as to facilitate the cleaning of the paired accommodating cavities and the removal and placement of the cylindrical batteries 20.

[0041] Obviously, in other embodiments, the integrally formed accommodating cavity may also be directly formed on the integrally formed base 100 by punching holes or the like.

[0042] Please also read Figure 3 , Figure 4 and Figure 5 The clamping mechanism 200 includes a pressing plate 210 and an elastic holding assembly 220. The pressing plate 210 is detachably mounted on the base 100 and holds the cylindrical battery 20 in the receiving cavity. Specifically, the pressing plate 210 can be fastened to the end surface of the column 120 by bolts. A limiting recess 212 is formed on the side of the pressing plate 210 facing the receiving cavity, and the limiting recess 212 is adapted to the pole end of the cylindrical battery 20, thereby limiting the cylindrical battery 20 in the receiving cavity along the circumference thereof.

[0043] The pressure plate 210 is formed with an avoidance structure 211, which exposes the welding position of the cylindrical battery 20. The avoidance structure 211 is generally a groove or hole structure that penetrates the pressure plate 210 in the thickness direction. The welding position of the cylindrical battery 20 refers to the preset area of ​​the pole and the shell. Specifically in the present embodiment, the avoidance structure 211 includes a first avoidance groove 2111 that exposes the pole of the cylindrical battery 20 and a second avoidance groove 2112 that exposes the shell of the cylindrical battery 20. Since the pole is generally located at the center of the end face of the cylindrical battery 20, the first avoidance groove 2111 is usually arranged concentrically with the limiting pit 212.

[0044] The elastic holding component 220 is installed on the side of the pressing plate 210 facing away from the accommodating cavity, and forms a first slide groove (not shown) and a second slide groove (not shown) extending to the avoidance structure 211 between the pressing plate 210. At least one side opening of the first slide groove and the second slide groove is located at the outer edge of the pressing plate 210, so the positive electrode tab 30 and the negative electrode tab 40 can be inserted into the first slide groove and the second slide groove respectively. Further, the positive electrode tab 30 and the negative electrode tab 40 can slide along the first slide groove and the second slide groove to the avoidance structure 211 and abut against the welding position of the cylindrical battery 20. Specifically, the first slide groove and the second slide groove extend to the first avoidance groove 2111 and the second avoidance groove 2112 respectively, and the positive electrode tab 30 and the negative electrode tab 40 can slide to the first avoidance groove 2111 and the second avoidance groove 2112 respectively, and abut against the pole and shell of the cylindrical battery 20 respectively.

[0045] Please also read Figure 6 , the surface of the pressure plate 210 facing the elastic pressing component 220 forms a first sinking platform 213 and a second sinking platform 214, and the first sinking platform 213 and the second sinking platform 214 cooperate with the elastic pressing component 220 to form a first slide groove and a second slide groove respectively. Moreover, in order to enable the positive electrode tab 30 and the negative electrode tab 40 to slide along the first slide groove and the second slide groove respectively to abut against the pole and the shell of the cylindrical battery 20, the surface of the first sinking platform 213 is roughly flush with the pole, and the surface of the second sinking platform 214 is roughly flush with the shell. Since the height of the pole of the cylindrical battery 20 is greater than the height of the shell, the height of the first sinking platform 213 is greater than the height of the second sinking platform 214, that is, the sinking depth of the second sinking platform 214 is greater than the first sinking platform 213.

[0046] In this embodiment, a partition 215 is formed on the surface of the pressure plate 210 facing away from the accommodating cavity, and the partition 215 is located between the first avoidance groove 2111 and the second avoidance groove 2112, and the positive electrode bar 30 and the negative electrode bar 40 can slide along the first slide groove and the second slide groove until they abut against the partition 215.

[0047] The separator 215 can be integrally formed with other parts of the pressing plate 210, or can be welded to the pressing plate 210. The separator 215 plays a role of isolation between the first avoidance groove 2111 and the second avoidance groove 2112. When the positive electrode bar 30 and the negative electrode bar 40 slide along the first slide groove and the second slide groove to the first avoidance groove 2111 and the second avoidance groove 2112 respectively, the separator 215 can prevent the positive electrode bar 30 from contacting the negative electrode bar 40, thereby avoiding a short circuit.

[0048] Please also read Figure 7 , Figure 8 , Fig. 9 and Fig.10, when the positive electrode tab 30 and the negative electrode tab 40 are respectively in contact with the pole and the shell, the positive electrode tab 30 and the negative electrode tab 40 can be welded to the pole and the shell of the cylindrical battery 20 respectively by performing welding operation through the avoidance structure 211. Moreover, the elastic pressing component 220 can generate an elastic pre-tightening force to press the positive electrode tab 30 and the negative electrode tab 40 in the first slide groove and the second slide groove respectively. Therefore, the positive electrode tab 30 and the negative electrode tab 40 can maintain a stable relative position with the cylindrical battery 20 in the accommodating cavity. Therefore, it is not easy to be misplaced or separated from the cylindrical battery 20 during the welding process. Moreover, under the action of the pre-tightening force, the positive electrode tab 30 and the negative electrode tab 40 can also fit tightly with the welding position of the cylindrical battery 20, thereby effectively avoiding the occurrence of cold welding and other phenomena, and ensuring the welding yield.

[0049] In this embodiment, two bar clamping mechanisms 200 are provided, and the two bar clamping mechanisms 200 are arranged opposite to each other, and the avoidance structures 211, the first slide groove and the second slide groove of the two bar clamping mechanisms 200 are connected to each other. Specifically, the avoidance structure 211, the first slide groove and the second slide groove of each bar clamping mechanism 200 are semi-closed structures, and the first slide groove and the second slide groove are both formed with openings on the side (perpendicular to the extension direction).

[0050] After the avoidance structures 211, the first slide grooves and the second slide grooves of the two bar clamping mechanisms 200 are connected to each other, the two avoidance structures 211 form a closed structure, and the lateral openings of the two first slide grooves and the two second slide grooves are connected to form a whole. In this way, the cylindrical battery 20, the positive bar 30 and the negative bar 40 can play a better limiting role.

[0051] After welding is completed, the two tab clamping mechanisms 200 can be removed and separated from the base 100. At this time, the positive tab 30 and the negative tab 40 can be moved out from the side of the first chute and the second chute, respectively, so that the cylindrical battery 20 that has been welded can be easily removed from the tab welding tool 10.

[0052] In this embodiment, the positive electrode tab 30 and the negative electrode tab 40 squeeze the elastic holding component 220 in the process of passing through the first slide groove and the second slide groove, and the elastic holding component 220 generates an elastic pre-tightening force that presses the positive electrode tab 30 and the negative electrode tab 40 in the first slide groove and the second slide groove respectively.

[0053] That is to say, the positive electrode tab 30 and the negative electrode tab 40 are subjected to the pre-tightening force applied by the elastic pressing component 220 when passing through the first slide groove and the second slide groove. Therefore, the positive electrode tab 30 and the negative electrode tab 40 can be automatically pressed after contacting the welding position of the cylindrical battery 20, without the need for manual operation of the elastic pressing component 220, thereby improving the convenience of operation.

[0054] Please refer again Figure 3In this embodiment, the elastic holding assembly 220 includes a flap fixing block 221, an elastic member 222 and a holding member 223. The flap fixing block 221 is installed on the side of the pressing plate 210 facing away from the accommodating cavity, and forms a first slide groove and a second slide groove with the pressing plate 210. The flap fixing block 221 can be installed on the base 100 together with the pressing plate 210 by bolts. The flap fixing block 221 cooperates with the pressing plate 210 to play a good role in limiting the flap.

[0055] Furthermore, the abutting member 223 is at least partially located in the first chute and the second chute, and the positive electrode bar sheet 30 and the negative electrode bar sheet 40 squeeze the abutting member 223 and force the elastic member 222 to undergo elastic deformation in the process of passing through the first chute and the second chute, so as to generate an elastic preload force that presses the positive electrode bar sheet 30 and the negative electrode bar sheet 40 in the first chute and the second chute, respectively. The number of the abutting members 223 is at least two, and the first chute and the second chute each correspond to at least one abutting member 223. The distance between the abutting member 223 and the pressing plate 210 is less than the thickness of the positive electrode bar sheet 30 and the negative electrode bar sheet 40, so the positive electrode bar sheet 30 and the negative electrode bar sheet 40 will squeeze the abutting member 223 in the process of passing through the first chute and the second chute, and cause the elastic member 222 to generate an elastic preload force.

[0056] Furthermore, in this embodiment, the elastic pressing assembly 220 further includes a spring plate 224, which is mounted on the side of the bar fixing block 221 facing away from the pressing plate 210. The bar fixing block 221 is provided with a ball hole 2211 penetrating in the thickness direction, the abutting member 223 is configured as a ball and received in the ball hole 2211, and the elastic member 222 is configured as a spring, one end of the spring abuts against the spring plate 224, and the other end abuts against the ball so that the ball part extends out of the ball hole 2211 near the pressing plate 210.

[0057] The diameter of the ball hole 2211 at one end close to the pressure plate 210 is smaller than the diameter of the ball, so the ball can be confined in the ball hole 2211 and can be partially extended from the ball hole 2211. When the positive bar 30 passes through the first slide groove, the positive bar 30 squeezes the ball to retreat to the ball hole 2211 and forces the spring to compress, and the preload force generated by the spring compression acts on the positive bar 30 through the ball. As the positive bar 30 continues to be inserted, the ball can roll along the surface of the positive bar 30, thereby effectively reducing the friction between the positive bar 30 and the abutment 223, thereby avoiding damage to the positive bar 30 and preventing it from getting stuck. The process of inserting the negative bar 40 along the second slide groove is the same and will not be repeated here.

[0058] Furthermore, in this embodiment, at least two ball holes 2211 are opened in the area corresponding to the first slide groove of the bar fixing block 221, and at least two ball holes 2211 are opened in the area corresponding to the second slide groove of the bar fixing block 221, and a ball is arranged in each ball hole 2211.

[0059] Specifically, at least two ball holes 2211 corresponding to the first slide groove extend along the extension direction of the first slide groove, and at least two ball holes 2211 corresponding to the second slide groove extend along the extension direction of the second slide groove. It can be seen that when the positive electrode bar sheet 30 and the negative electrode bar sheet 40 are respectively inserted into the first slide groove and the second slide groove, they can be respectively subjected to the pre-tightening force applied by at least two balls, so the pressing effect on the positive electrode bar sheet 30 and the negative electrode bar sheet 40 is better.

[0060] Please also read Fig.11 and Fig.12 In this embodiment, a mounting hole 2241 is provided on the side of the spring plate 224 facing the bar fixing block 221, and a positioning column 2242 is provided in the mounting hole 2241. One end of the spring is received in the mounting hole 2241 and sleeved on the positioning column 2242. The mounting hole 2241 can receive and position the spring, and the positioning column 2242 can also support and position the spring. In this way, the spring between the ball and the spring plate 224 is not easily misaligned, and the reliability of the elastic holding assembly 220 can be ensured.

[0061] In addition, in this embodiment, the middle parts of the bar fixing block 221 and the spring plate 224 are disconnected to expose the avoidance structure 211. Specifically, the bar fixing block 221 and the spring plate 224 are divided into two parts, one part of the bar fixing block 221 cooperates with the pressing plate 210 to form a first slide groove, and the other part cooperates with the pressing plate 210 to form a second slide groove. Since the avoidance structure 211 is exposed, the bar fixing block 221 and the spring plate 224 will not block the welding position of the cylindrical battery 20, thereby facilitating the welding operation.

[0062] It should be noted that in other embodiments, the bar fixing block 221 and the spring plate 224 may be an integrally formed structure, and the avoidance structure 211 may be exposed by opening a hole or a groove in a region corresponding to the avoidance structure 211 .

[0063] The above-mentioned bar welding tool 10 can first place the cylindrical battery 20 in the accommodating cavity when performing bar welding, and then install the bar clamping mechanism 200 on the base 100, so that the pressure plate 210 can position the cylindrical battery 20. Then, the positive bar 30 and the negative bar 40 are inserted along the first slide groove and the second slide groove respectively, until the positive bar 30 and the negative bar 40 slide to the avoidance structure 211 and abut against the welding position of the cylindrical battery 20. At this time, the positive bar 30 and the negative bar 40 can be welded to the corresponding welding positions of the cylindrical battery 20 through the avoidance structure 211. Since the elastic pressing component 220 can press the positive electrode tab 30 and the negative electrode tab 40 in the first slide groove and the second slide groove, thereby maintaining a stable relative position with the cylindrical battery 20 in the accommodating cavity, the positive electrode tab 30 and the negative electrode tab 40 are not easily misaligned or separated from the cylindrical battery 20 during the welding process, thereby effectively improving the tab welding effect.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A bar welding tool, characterized in that: include: A base having a receiving cavity for receiving a cylindrical battery; and The clamping mechanism of the battery sheet includes a pressing plate and an elastic pressing component. The pressing plate is detachably mounted on the base and presses the cylindrical battery in the accommodating cavity. The pressing plate is formed with a avoiding structure for exposing the welding position of the cylindrical battery. The elastic pressing component is mounted on a side of the pressing plate facing away from the accommodating cavity, and forms a first slide groove and a second slide groove extending to the avoiding structure between the pressing plate and the elastic pressing component. Among them, the positive electrode tab and the negative electrode tab can slide along the first slide groove and the second slide groove to the avoidance structure and abut against the welding position of the cylindrical battery, and the elastic pressing component can generate an elastic pre-tightening force to press the positive electrode tab and the negative electrode tab into the first slide groove and the second slide groove respectively.

2. The bar welding tool according to claim 1, characterized in that: The base includes a bottom plate and two columns. A circular pit is formed on the surface of the bottom plate. A semicircular groove is formed on one side of each column. The two columns are detachably installed relative to the bottom plate, and the accommodating cavity is formed between the circular pit and the two semicircular grooves.

3. The bar welding tool according to claim 1, characterized in that: The avoidance structure includes a first avoidance groove exposing the pole of the cylindrical battery and a second avoidance groove exposing the shell of the cylindrical battery, the first slide groove and the second slide groove extend to the first avoidance groove and the second avoidance groove respectively, and a partition is formed on the surface of the pressure plate facing away from the accommodating cavity, and the partition is located between the first avoidance groove and the second avoidance groove, and the positive electrode tab and the negative electrode tab can slide along the first slide groove and the second slide groove until they abut against the partition.

4. The bar welding tool according to claim 1, characterized in that: The positive electrode tab and the negative electrode tab squeeze the elastic holding component in the process of passing through the first slide groove and the second slide groove, and the elastic holding component generates an elastic pre-tightening force to hold the positive electrode tab and the negative electrode tab in the first slide groove and the second slide groove respectively.

5. The bar welding tool according to claim 4, characterized in that: The elastic pressing assembly includes a tab fixing block, an elastic member and a resisting member. The tab fixing block is installed on the side of the pressure plate facing away from the accommodating cavity, and forms the first slide groove and the second slide groove between the tab fixing block and the pressure plate. The resisting member is at least partially located in the first slide groove and the second slide groove. The positive tab and the negative tab squeeze the resisting member and force the elastic member to undergo elastic deformation in the process of passing through the first slide groove and the second slide groove, so as to generate an elastic pre-tightening force to press the positive tab and the negative tab in the first slide groove and the second slide groove respectively.

6. The bar welding tool according to claim 5, characterized in that: The elastic pressing assembly also includes a spring plate, which is installed on the side of the bar fixing block facing away from the pressure plate. The bar fixing block is provided with a ball hole penetrating in the thickness direction. The abutting member is configured as a ball and accommodated in the ball hole. The elastic member is configured as a spring, one end of the spring abuts against the spring plate, and the other end abuts against the ball and causes the ball portion to extend out of the ball hole close to one end of the pressure plate.

7. The bar welding tool according to claim 6, characterized in that: At least two ball holes are formed in the area of ​​the bar fixing block corresponding to the first slide groove, and at least two ball holes are formed in the area of ​​the bar fixing block corresponding to the second slide groove, and the ball is arranged in each ball hole.

8. The bar welding tool according to claim 6, characterized in that: A mounting hole is formed on one side of the spring plate facing the bar fixing block, a positioning column is arranged in the mounting hole, and one end of the spring is received in the mounting hole and sleeved on the positioning column.

9. The bar welding tool according to claim 6, characterized in that: The middle parts of the bar fixing block and the spring plate are disconnected to expose the avoidance structure.

10. The bar welding tool according to any one of claims 1 to 9, characterized in that: Two of the bar clamping mechanisms are provided, and the two bar clamping mechanisms are arranged opposite to each other, and the avoidance structures, the first sliding grooves, and the second sliding grooves of the two bar clamping mechanisms are connected to each other.

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