A lithium battery tab clamping mechanism

Abstract

The present invention discloses a lithium battery tab clamping mechanism, comprising a base, a first clamping portion and a second clamping portion pivotally mounted on the base, and a current metal sheet and a voltage metal sheet respectively provided on the first clamping portion and the second clamping portion; the voltage metal sheet is composed of a plurality of sheets, the base is provided with a first pivoting portion and a second pivoting portion arranged opposite to each other, a rotating shaft is provided between the first pivoting portion and the second pivoting portion, the middle portion of the first clamping portion and the middle portion of the second clamping portion are pivotally mounted on the rotating shaft, the rotating shaft is provided with an elastic member that drives the front end of the first clamping portion and the front end of the second clamping portion to fit together or move away from each other; the side walls of the first clamping portion and the second clamping portion further extend horizontally with a first opening pin and a second opening pin respectively provided with a staggered arrangement based on the rotating shaft. Through the cooperation of the first opening pin and the second opening pin, the limiting mechanism and the guide structure, the force on both sides of the tab can be evenly distributed.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery formation equipment, and in particular to a lithium battery tab clamping mechanism. Background Art

[0002] Current lithium battery formation equipment uses a tab clamping mechanism, particularly for batteries with dual tabs. The tab clamping mechanism typically uses a one-to-eight-iron-plate clamping mechanism. This approach doesn't allow for single-point control of battery formation, makes it impossible to record formation data for each battery, and doesn't guarantee consistent clamping force for each tab. It also makes it impossible to track battery data later. Furthermore, the two-wire system (which only detects current input) prevents accurate battery information collection and compromises battery formation quality. Furthermore, inconsistent clamping force can easily cause indentations on one side of the tab, impacting subsequent processing and welding processes. In severe cases, it can even lead to short circuits in the lithium battery. Summary of the Invention

[0003] The main purpose of the present invention is to propose a lithium battery tab clamping mechanism, which aims to improve the shortcomings of the existing lithium battery clamping mechanism, so that the clamping mechanism can evenly apply force to both ends of the tab, reduce damage to the tab, and accurately obtain the formation data of the lithium battery to ensure product tracking.

[0004] To achieve the above-mentioned object, the present invention provides a lithium battery tab clamping mechanism, comprising a base, a first clamping portion and a second clamping portion pivotally mounted on the base, and a current metal sheet and a voltage metal sheet respectively provided on the first clamping portion and the second clamping portion;

[0005] The voltage metal sheet is composed of a plurality of sheets, the base is provided with a first pivot portion and a second pivot portion arranged opposite to each other, a rotating shaft is provided between the first pivot portion and the second pivot portion, the middle portion of the first clamping portion and the middle portion of the second clamping portion are pivotally mounted on the rotating shaft, and the rotating shaft is provided with an elastic member that drives the front end of the first clamping portion and the front end of the second clamping portion to fit together or move away from each other;

[0006] The base is also provided with a guide structure and a limiting structure. The guide structure is used for the first clamping part and the second clamping part to swing along a predetermined direction. The limiting structure is used to limit the swing amplitude of the first clamping part and the second clamping part. The side walls of the first clamping part and the second clamping part are also horizontally extended with a first opening pin and a second opening pin staggered with the rotating shaft as the base point.

[0007] When the technical solution of the present invention is actually used, the elastic part applies the same elastic force to the first clamping part and the second clamping part through the rotating shaft. At the same time, the first clamping part and the second clamping part are blocked by the limiting structure, so that the front end of the first clamping part and the front end of the second clamping part are in the reference axial position, so that the clamping force is the same, avoiding the problem of uneven clamping force on both sides of the pole ear; at the same time, through the cooperation of the guide structure and the first opening pin and the second opening pin, the first clamping part and the second clamping part are opened more smoothly. During actual opening, the corresponding opening equipment directly pulls or pushes the first opening pin and the second opening pin, so that rapid opening can be achieved, avoiding the problem of hooking the pole ear, and the opening is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A three-dimensional diagram of the present invention (viewing angle 1);

[0009] Figure 2 A three-dimensional diagram of the present invention (viewing angle 2);

[0010] Figure 3 It is a cross-sectional view of the present invention;

[0011] Figure 4 This is an exploded view of the present invention.

[0012] In the figure, 1 is the base, 11 is the main body, 12 is the side plate, 101 is the first blocking part, 102 is the second blocking part, 21 is the first clamping part, 22 is the second clamping part, 211 is the mounting part, 3 is the guide groove, 41 is the first clamping pin, 42 is the second clamping pin, 51 is the hook, 52 is the positioning column, 61 is the current metal sheet, 62 is the voltage metal sheet, 71 is the first clamping slot, 72 is the second clamping slot, 81 is the first connecting slot, 82 is the second connecting slot, 9 is the rotating shaft, 91 is the elastic member, and 100 is the axis. DETAILED DESCRIPTION

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0014] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0015] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0016] like Figures 1 to 4 As shown, a lithium battery tab clamping mechanism includes a base 1, a first clamping portion 21 and a second clamping portion 22 pivotally mounted on the base 1, and a current metal sheet 61 and a voltage metal sheet 62 respectively provided on the first clamping portion 21 and the second clamping portion 22;

[0017] The voltage metal sheet 62 is composed of multiple sheets (which can realize the detection of multiple data), and the base 1 is provided with a first pivot portion and a second pivot portion arranged opposite to each other. A rotating shaft 9 is provided between the first pivot portion and the second pivot portion. The middle part of the first clamping portion 21 and the middle part of the second clamping portion 22 are pivotally mounted on the rotating shaft 9. The rotating shaft 9 is provided with an elastic member 91 for driving the front end of the first clamping portion 21 and the front end of the second clamping portion 22 to fit together or move away from each other. The elastic member 91 can be defined according to the actual situation of the clamping device, that is, the elastic member 91 can make the first clamping portion 21 and the second clamping portion 22 fit together, then the clamping device overcomes the pressure of the elastic member 91 and loosens the tab; when the elastic member 91 makes the first clamping portion 21 and the second clamping portion 22 fit together, the opposite is true;

[0018] The base 1 is also provided with a guide structure and a limiting structure. The guide structure is used for the first clamping part 21 and the second clamping part 22 to swing along a predetermined direction, and the limiting structure is used to limit the swing amplitude of the first clamping part 21 and the second clamping part 22. The side walls of the first clamping part 21 and the second clamping part 22 are also horizontally extended with a first opening pin 41 and a second opening pin 42 staggered with the rotating shaft 9 as the base point.

[0019] During actual use, the elastic member 91 applies the same elastic force to the first clamping part 21 and the second clamping part 22 through the rotating shaft 9. At the same time, the first clamping part 21 and the second clamping part 22 are blocked by the limiting structure, so that the front end of the first clamping part 21 and the front end of the second clamping part 22 are at the reference axis 100 position, so that the clamping force is the same, avoiding the problem of uneven clamping force on both sides of the pole ear; at the same time, through the cooperation of the guide structure and the first opening pin 41 and the second opening pin 42, the first clamping part 21 and the second clamping part 22 are opened more smoothly. During actual opening, the corresponding opening device directly pulls or pushes the first opening pin 41 and the second opening pin 42, so that rapid opening can be achieved, avoiding the problem of hooking the pole ear, and the opening is more stable.

[0020] Of course, in a specific embodiment, the first opening clamp pin 41 and the second opening clamp pin 42 can also be respectively set integrally with the first clamping part 21 and the second clamping part 22, for example, a protrusion can be set. Of course, it can also be set on one side of the rotating shaft 9, which is also possible, but in a preferred embodiment, the staggered setting makes the opening smoother, and can reduce the hooking of the pole ear and make the force more uniform.

[0021] In a specific embodiment of the present invention, the base 1 includes a main body 11 and side panels 12 extending from both sides of the main body 11 , the rotating shaft 9 is disposed between the two side panels 12 , and the first pivot portion and the second pivot portion are respectively disposed on the two side panels 12 .

[0022] Specifically, the upper and lower sides of the two side plates 12 are respectively provided with a first stop 101 and a second stop 102, which are used to limit the swing amplitude of the rear end of the first clamping portion 21 and the rear end of the second clamping portion 22, respectively. This is the limiting structure. Alternatively, the limiting structure may be implemented by providing the first stop 101 and the second stop 102 on the upper and lower sides of the guide slot 3, and providing the first and second clamping pins 41 and 42 on the first and second pivoting portions, respectively, to slide along the length direction of the guide slot 3 and abut against the upper and lower ends of the guide slot 3.

[0023] One side plate 12 is provided with a guide groove 3 , and the guide groove 3 is matched with the first clamping pin 41 , and the first clamping pin 41 can slide along the length direction of the guide groove 3 .

[0024] In one embodiment, the guide groove 3 is provided with a first clamping pin 41 that slides along the length direction of the guide groove 3 and plays a role of limiting, that is, the guide structure.

[0025] In a specific embodiment of the present invention, opposing hooks 51 are provided on the upper and lower sides of the rear wall of the main body 11, with a positioning post 52 provided between the two hooks 51. The cooperation between the hooks 51 and the positioning post 52 facilitates the clamping mechanism to be fixed to the formation device, and makes installation and removal more convenient, allowing for quick replacement and improving formation efficiency.

[0026] Specifically, the walls at the front ends of the first clamping portion 21 and the second clamping portion 22 are arranged in a trapezoidal shape, and the current metal sheet 61 and the voltage metal sheet 62 are also arranged in a trapezoidal shape. This improves the toughness of the metal sheets and prevents fatigue or damage to the metal sheets caused by repeated insertion and removal.

[0027] In a specific embodiment of the present invention, the front end of the first clamping portion 21 and the front end of the second clamping portion 22 are respectively provided with a first clamping groove 71 and a second clamping groove 72. The current metal sheet 61 and the voltage metal sheet 62 are respectively clamped in the first clamping groove 71 and the second clamping groove 72. This ensures that the current metal sheet 61 and the voltage metal sheet 62 are stably installed.

[0028] Furthermore, the first clamping portion 21 and the second clamping portion 22 are respectively provided with a first connecting groove 81 and a second connecting groove 82 at the rear end of the current metal sheet 61 and the rear end of the voltage metal sheet 62. The rear end of the current metal sheet 61 and the voltage metal sheet 62 pass through the first connecting groove 81 and the second connecting groove 82 respectively. The setting of the connecting groove facilitates the installation and fixation of the metal sheets.

[0029] In a specific embodiment of the present invention, the length of the first clamping portion 21 is greater than the length of the second clamping portion 22 .

[0030] Specifically, a mounting portion 211 is provided at the rear end of the first clamping portion 21 , and the first clamping pin 41 is detachably provided on the mounting portion 211 .

[0031] During the actual installation process, the current metal sheet 61 and the voltage metal sheet 62 are first installed on the first clamping part 21 and the second clamping part 22 respectively, and the first clamping part 21 and the second clamping part 22 are respectively placed between the two side plates 12, and then the elastic part 91 is placed between the first clamping part 21 and the second clamping part 22, and then the rotating shaft 9 is passed through the first clamping part 21, the second clamping part 22 and the elastic part 91 in turn, thereby achieving the mutual approach of the two and the preliminary installation, and then the first opening clamp pin 41 and the second opening clamp pin 42 are respectively installed on the first clamping part 21 and the second clamping part 22, and then the base 1 is fixed on the forming machine.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A lithium battery tab clamping mechanism, characterized in that: It comprises a base, a first clamping portion and a second clamping portion pivotally mounted on the base, and a current metal sheet and a voltage metal sheet respectively provided on the first clamping portion and the second clamping portion; The voltage metal sheet is composed of a plurality of sheets, the base is provided with a first pivot portion and a second pivot portion arranged opposite to each other, a rotating shaft is provided between the first pivot portion and the second pivot portion, the middle portion of the first clamping portion and the middle portion of the second clamping portion are pivotally mounted on the rotating shaft, and the rotating shaft is provided with an elastic member that drives the front end of the first clamping portion and the front end of the second clamping portion to fit together or move away from each other; The base is further provided with a guide structure and a limiting structure, wherein the guide structure is used to swing the first clamping part and the second clamping part in a predetermined direction, and the limiting structure is used to limit the swing amplitude of the first clamping part and the second clamping part. The side walls of the first clamping part and the second clamping part further extend horizontally with a first opening pin and a second opening pin respectively arranged in a staggered manner with the rotation axis as a base point; The base includes a main body and side plates extending from both sides of the main body, the rotating shaft is arranged between the two side plates, and the first pivot portion and the second pivot portion are respectively arranged on the two side plates; The upper and lower sides of the two side plates are respectively provided with a first stopper and a second stopper, and the first stopper and the second stopper are used to limit the swing amplitude of the rear end of the first clamping part and the rear end of the second clamping part respectively; One side plate is provided with a guide groove, the guide groove and the first clamping pin are matched, and the first clamping pin can slide along the length direction of the guide groove; The upper and lower sides of the rear wall of the main body are provided with oppositely arranged hooks, and a positioning column is provided between the two hooks.

2. The lithium battery tab clamping mechanism according to claim 1, wherein: The wall surfaces opposite to the front ends of the first clamping portion and the second clamping portion are distributed in a trapezoidal shape, and the current metal sheet and the voltage metal sheet are also in a trapezoidal shape.

3. The lithium battery tab clamping mechanism according to claim 2, wherein: The front end of the first clamping portion and the front end of the second clamping portion are opposite to each other and are respectively provided with a first clamping slot and a second clamping slot, and the current metal sheet and the voltage metal sheet are respectively clamped in the first clamping slot and the second clamping slot.

4. The lithium battery tab clamping mechanism according to claim 2, wherein: The first clamping portion and the second clamping portion are respectively provided with a first connecting groove and a second connecting groove at the rear end of the current metal sheet and the rear end of the voltage metal sheet, and the rear end of the current metal sheet and the voltage metal sheet pass through the first connecting groove and the second connecting groove respectively.

5. The lithium battery tab clamping mechanism according to claim 2, wherein: The length of the first clamping portion is greater than the length of the second clamping portion.

6. The lithium battery tab clamping mechanism according to claim 1, wherein: A mounting portion is provided at the rear end of the first clamping portion, and the first clamping pin is detachably provided on the mounting portion.

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