Soft package battery cell double-side tab pressurization formation clamp

Abstract

The utility model relates to lithium battery manufacturing equipment technical field discloses a kind of soft package electric core double-side tab pressurization formation clamps, including clamping body, mounting mechanism, clamping mechanism and mechanism block, and the placement groove is set in the upper end middle part of clamping body, mechanism block is slidably connected in the inside of placement groove, mounting mechanism is set in the inside of clamping body, and mounting mechanism includes rotator, telescopic rod one and clamping bar, guide slot, rotation groove and clamping groove are set in the lower end middle part of mechanism block, clamping bar is slidably connected in guide slot and is cooperated in rotation groove and the inside of clamping groove to realize rotary locking, clamping mechanism is set in the inside of mechanism block, and clamping mechanism includes telescopic rod two, clamping block and rubber block, and rubber strip is equipped outside clamping block.The utility model is rotated by the rotary buckle cooperation of mounting mechanism and mechanism block, solve the problem of difficult disassembly maintenance after clamping mechanism is fixed, realize flexible clamping by rubber block, avoid rigid damage, realize dynamic sealing using rubber strip, effectively block impurity intrusion.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing equipment technology, and in particular to a pressure formation fixture for double-sided tabs of soft-pack battery cells. Background Technology

[0002] In the production and manufacturing process of soft-pack lithium-ion batteries, the formation process is a key step in activating the performance of the cells. In order to ensure the safety of the formation process and the stability of electrical performance testing, a special formation fixture is required to position and clamp the soft-pack cells. To ensure the stability of the clamping, the existing formation fixtures use bolt locking and welding to directly fix the clamping module to the base of the production line.

[0003] However, this traditional rigid connection method has revealed serious shortcomings in actual production and maintenance. Due to the complex environment of the formation workshop and the extremely high frequency of equipment operation, the moving parts inside the clamping module will inevitably wear and malfunction after long-term use. When it is necessary to repair and replace the damaged clamping module, the fixed connection structure makes the disassembly process extremely cumbersome. Maintenance personnel need to spend a lot of time removing bolts and damaging welding points to remove the clamping module. This not only increases the maintenance cost of the equipment, but also causes the entire formation production line to be shut down for a long time, which seriously reduces production efficiency. In addition, the existing clamps mostly use the method of direct pressure of metal blocks when clamping the cells. This rigid contact will cause indentations or even puncture the outer packaging film on the surface of the soft-pack cell, which will lead to an increase in the scrap rate of the cells.

[0004] Therefore, this utility model proposes a pressure forming fixture for double-sided tabs of soft-pack battery cells to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems in the existing technology, the use of bolts or welding for fixing the clamping module in the formation jigs of soft-pack battery cells has led to cumbersome, time-consuming and labor-intensive disassembly and maintenance after damage. In addition, the use of rigid metal contact in existing jigs has caused physical indentation or damage to the surface of soft-pack battery cells. The present invention aims to provide a double-sided tab pressure formation jig for soft-pack battery cells with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a pressure forming fixture for double-sided tabs of soft-pack battery cells, comprising: a fixture body, an installation mechanism, a clamping mechanism, and a mechanism block. A placement groove is formed in the middle of the upper end of the fixture body. The mechanism block is slidably connected to the inside of the placement groove. A space for placing the battery cell is formed in the middle of the inner side of the fixture body. The installation mechanism is disposed on the left and right ends inside the fixture body. The installation mechanism includes a position groove formed on the lower outer side of the placement groove. A rotator is fixedly connected to the bottom end of the position groove. A connecting block is fixedly connected to the upper end of the rotator. A telescopic rod is fixedly connected to the upper end of the connecting block. A locking rod is fixedly connected to the upper end of the telescopic rod. A guide is formed in the middle of the lower end of the mechanism block. The guide groove has a rotating groove at its upper end and a card slot at its lower outer end. A carding rod is slidably connected to the guide groove and engages with the rotating groove and the card slot. A clamping mechanism is located inside the mechanism block. The clamping mechanism includes a second position groove inside the mechanism block, a second telescopic rod fixedly connected inside the second position groove, a sliding groove connected to one side of the outer end of the second position groove, a clamping block fixedly connected to the output end of the second telescopic rod, a clamping block slidably connected to the sliding groove, a rubber groove on the outer side of the clamping block, a rubber strip fixedly connected inside the rubber groove, and a rubber block fixedly connected to the side of the clamping block facing the battery cell.

[0007] Preferably, in order to achieve simultaneous clamping of the battery cell on both sides and facilitate maintenance, the placement slot is disposed at the left and right ends inside the clamping body, and the mechanism block is disposed at the left and right ends inside the placement slot, and the mechanism block is fixed and disassembled with the clamping body through the mounting mechanism.

[0008] Preferably, in order to ensure smooth movement of the clamping block and prevent impurities from entering, a sliding groove is opened on one side of the outer end of the second position groove, the clamping block is slidably connected to the inside of the sliding groove, and rubber grooves are opened at both ends of the outer side of the clamping block. A rubber strip is fixed inside the rubber groove, and the outer surface of the rubber strip abuts against the inner wall of the sliding groove.

[0009] Preferably, in order to clarify the clamping direction of the battery cell, a space for accommodating the battery cell is formed in the middle of the inner side of the clamping body, the second position groove is opened at the front and rear ends inside the clamping body, and the clamping block is driven by the second telescopic rod to move along the slide groove toward the battery cell.

[0010] Preferably, in order to ensure the reliability of the locking structure of the mechanism block, the cross-sectional shape of the locking rod is adapted to the cross-sectional shape of the guide groove, the locking rod is set to a T-shape, and the inner diameter of the rotating groove is larger than the maximum outer diameter of the locking rod, and the cross-sectional shape of the locking groove is adapted to the cross-sectional shape of the locking rod.

[0011] Preferably, in order to provide precise and controllable driving force, the rotator is a servo motor or a stepper motor, and both the first telescopic rod and the second telescopic rod are electric push rods or cylinders.

[0012] Preferably, in order to avoid the clamp causing hard damage to the battery cell, the rubber block is made of a flexible rubber material that is resistant to acid and alkali corrosion, and the surface of the rubber block facing the middle of the clamp is set as a plane.

[0013] Preferably, the mechanism block is provided with a clamping mechanism, which consists of the second position groove, the sliding groove, the second telescopic rod, the clamping block, the rubber block, the rubber groove and the rubber strip.

[0014] This utility model has the following beneficial effects: 1. This utility model, by setting a rotating buckle structure that cooperates with the installation mechanism and the mechanism block, uses a telescopic rod to drive the clamping rod into the guide groove at the bottom of the mechanism block. With the help of a rotator, the clamping rod rotates in the rotating groove and is pulled back to lock in the groove. This solves the problem in the prior art that the clamping mechanism is difficult to disassemble after being fixed, which leads to inconvenience in maintenance and replacement. It achieves the effect of quick positioning and installation of the mechanism block and stable locking, while improving the maintenance efficiency of the equipment.

[0015] 2. This utility model solves the problem of physical scratches or squeezing damage to the surface of soft-pack battery cells caused by direct clamping with rigid materials in the prior art by setting a clamping block driven by a telescopic rod and a rubber block at the front end in the clamping mechanism, and utilizing the elastic deformation characteristics of the rubber block to directly contact the battery cell. It achieves the effect of flexible buffer clamping of the battery cell and effectively protects the appearance integrity of the battery cell.

[0016] 3. This utility model solves the problem in the prior art that dust or impurities in the chemical formation environment enter the mechanism through the sliding gap and affect the normal operation of the drive components by opening a rubber groove on the side of the clamping block and embedding a rubber strip, so that the outer surface of the rubber strip is always in close contact with the inner wall of the groove. This achieves the effect of forming a dynamic seal during the clamping action, preventing impurities from entering and extending the service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a perspective view of a pressure forming fixture for double-sided tabs of a soft-pack battery cell proposed in this utility model. Figure 2 This is a cross-sectional view of the mounting mechanism of a pressure forming clamp for double-sided tabs of a soft-pack battery cell proposed in this utility model; Figure 3 This is a partial structural diagram of the mounting mechanism for a pressure forming clamp for double-sided tabs of a soft-pack battery cell proposed in this utility model. Figure 4This is a cross-sectional view of the clamping mechanism of a pressure forming fixture for double-sided tabs of a soft-pack battery cell proposed in this utility model.

[0018] Legend: 1. Clamping body; 2. Installation mechanism; 201. Mechanism block; 202. Guide groove; 203. Rotating groove; 204. Card slot; 205. Position slot one; 206. Rotator; 207. Connecting block; 208. Telescopic rod one; 209. Card rod; 3. Clamping mechanism; 301. Position slot two; 302. Sliding groove; 303. Telescopic rod two; 304. Clamping block; 305. Rubber block; 306. Rubber groove; 307. Rubber strip; 4. Placement groove; 5. Battery cell body. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Please refer to Figures 1 to 4 This utility model provides a pressure forming fixture for double-sided tabs of a soft-pack battery cell, which aims to solve the problems of difficult disassembly of the clamping structure after it is fixed, which leads to maintenance difficulties, as well as the problem of physical damage to the surface of the soft-pack battery cell caused by traditional rigid fixtures.

[0021] Please refer to Figures 1 to 4 The main structure of a pressure formation fixture for double-sided tabs of a soft-pack battery cell includes a fixture body 1, a mechanism block 201 slidably connected to the middle of the upper end of the fixture body 1, an installation mechanism 2 disposed at the left and right ends inside the fixture body 1, and a clamping mechanism 3 disposed inside the mechanism block 201. The fixture body 1 serves as the basic support component of the overall device. A placement groove 4 is opened in the middle of the upper end of the fixture body 1. The placement groove 4 extends horizontally and provides installation positioning and sliding guide space for the mechanism block 201. The mechanism block 201 is slidably connected to the inside of the placement groove 4. A space for accommodating the battery cell body 5 is formed in the middle of the inner side of the fixture body 1. The battery cell body 5 is placed in the space to wait for formation processing. The installation mechanism 2 is used to detachably lock the mechanism block 201 onto the fixture body 1. The clamping mechanism 3 is used to flexibly clamp and fix the battery cell body 5.

[0022] Specifically, to achieve quick connection and disassembly between the mechanism block 201 and the clamping body 1, the mounting mechanism 2 is located at the bottom inside the clamping body 1. A position slot 205 is formed on the lower outer side of the placement groove 4. The position slot 205 is used to accommodate the driving component of the mounting mechanism 2. A rotator 206 is fixedly connected to the bottom inside the position slot 205. The rotator 206 serves as a rotation drive source. A connecting block 207 is fixedly connected to the output end of the rotator 206. The connecting block 207 is used to transmit torque. A telescopic rod 208 is fixedly connected to the upper end of the connecting block 207. As a longitudinal drive source, telescopic rod 208 is fixedly connected to a locking rod 209 at its upper end. The locking rod 209 is used to perform a locking action. In cooperation with this, a guide groove 202 is opened in the middle of the lower end of the mechanism block 201. The upper end of the guide groove 202 is connected to the rotating groove 203, and the lower end of the rotating groove 203 is connected to the locking groove 204. The guide groove 202, the rotating groove 203, and the locking groove 204 are interconnected and together form the movement trajectory channel of the locking rod 209. The locking rod 209 can slide in the guide groove 202 and cooperate with the rotating groove 203 and the locking groove 204.

[0023] Please refer to Figure 2 and Figure 3 The mounting mechanism 2, as the active component for the locking action, is located inside the position slot 205 of the clamping body 1. The position slot 205 is located on the lower left and right sides of the outer side of the placement slot 4. The rotator 206 is fixedly connected to the bottom of the position slot 205. The rotator 206 uses a servo motor or stepper motor to provide precise rotation angle control. The connecting block 207 is fixedly connected to the end of the output shaft of the rotator 206. The connecting block 207 is used to transmit the rotational motion generated by the rotator 206 upward. The telescopic rod 208 is fixedly connected to the upper end of the connecting block 207. The telescopic rod 208 uses an electric push rod or cylinder to provide vertical lifting power. The locking rod 209 is fixedly connected to the top of the telescopic rod 208. The locking rod 209 is T-shaped and is a key component that directly performs the locking action.

[0024] Please refer to Figure 1 , Figure 2 and Figure 3To facilitate the locking logic of the locking lever 209, a dedicated mating groove is provided in the lower middle part of the mechanism block 201. A guide groove 202 is located on the bottom surface of the mechanism block 201 and extends upwards. The cross-sectional shape of the guide groove 202 matches the cross-sectional shape of the locking lever 209 to allow it to slide smoothly in. A rotating groove 203 is located at the top of the guide groove 202 and communicates with it. The inner diameter of the rotating groove 203 is larger than the maximum outer diameter of the locking lever 209. The rotating groove 203 provides space for the locking lever 209 to rotate horizontally within the mechanism block 201. A locking slot 204 is located at the lower outer side of the rotating groove 203 and communicates with it. The shape of the locking slot 204 matches the locking lever 209. The locking slot 204 is used to accommodate and restrict the locking lever 209 in the locked state. In the assembled or locked state, the mounting mechanism 2 and the mechanism block 201 form a tight locking engagement. When the mechanism block 201 moves along the placement... When the slot 4 slides to the predetermined installation position, the opening of the guide slot 202 is vertically aligned with the locking rod 209. The telescopic rod 208 drives the locking rod 209 to extend upward and slide into the guide slot 202 until the locking rod 209 is completely inside the rotating slot 203. Then, the rotator 206 drives the connecting block 207 to rotate the telescopic rod 208 and the locking rod 209 as a whole, so that the locking rod 209 rotates in the rotating slot 203 to an angle that is offset from the guide slot 202. Then, the telescopic rod 208 retracts in the opposite direction, causing the locking rod 209 to move downward and embed into the slot 204. The upper surface of the locking rod 209 presses tightly against the bottom surface of the slot 204, thereby firmly pulling the mechanism block 201 downward and locking it in the placement slot 4 of the clamp body 1. This rotating snap-fit ​​connection structure not only ensures the positional stability of the mechanism block 201 during operation, but also allows for quick disassembly and maintenance through reverse operation.

[0025] Please refer to Figure 1 and Figure 4 Telescopic rod 303 is fixedly connected inside position groove 301. Telescopic rod 303 is powered by an electric push rod or a cylinder. Slide groove 302 is opened on one side of the outer end of position groove 301 and communicates with position groove 301. Slide groove 302 extends horizontally toward the center of clamp body 1. Clamping block 304 is slidably connected inside slide groove 302. The output end of telescopic rod 303 is fixedly connected to the outer side of clamping block 304. Telescopic rod 303 is used to drive clamping block 304 to make reciprocating linear motion in slide groove 302. Rubber block 305 is fixedly connected to the side of clamping block 304 facing the battery cell 5. Rubber block 305 is made of soft rubber material with elastic buffering properties. Rubber block 305 is used as a direct contact element to flexibly press the battery cell 5. The elastic deformation of rubber block 305 avoids the clamping block 304 from directly and rigidly squeezing the battery cell 5 and causing physical damage.

[0026] As a further preferred embodiment, in order to improve the protective performance of the clamping mechanism 3 and extend the service life of the telescopic rod 303, a rubber groove 306 is formed at the upper and lower ends of the outer side of the clamping block 304. The rubber groove 306 extends along the sliding direction of the clamping block 304. A rubber strip 307 is fixedly connected inside the rubber groove 306. The outer surface of the rubber strip 307 protrudes from the surface of the clamping block 304 and keeps in close contact with the inner wall of the slide groove 302. The rubber strip 307 always fills the gap between the clamping block 304 and the slide groove 302 during the sliding process of the clamping block 304. The rubber strip 307 forms a dynamic sealing structure to prevent external dust or splashes during the formation process from entering the interior of the position groove 301, thereby effectively protecting the telescopic rod 303 from the influence of impurities.

[0027] Working principle: When clamping mechanism 3 needs to be installed, to avoid the situation where it cannot be replaced or repaired after being fixed, the operator activates the installation mechanism 2 installed at the left and right ends inside the clamping body 1. The mechanism block 201 slides along the placement groove 4. When the mechanism block 201 reaches the designated position so that the guide groove 202 is aligned with the clamping rod 209, the telescopic rod 208 is activated. The telescopic rod 208 drives the clamping rod 209 to slide up along the guide groove 202 and enter the rotating groove 203. Then the rotator 206 is activated. The rotator 206 connects to the connecting block 207 and the telescopic rod 208. 08 drives the clamping rod 209 to rotate in the rotating groove 203 until the clamping rod 209 is misaligned with the guide groove 202. Then, the telescopic rod 208 is activated to retract in the opposite direction. The clamping rod 209 slides along the clamping groove 204 and is tightly engaged inside the clamping groove 204. Through the above actions, the purpose of determining the installation position of the mechanism block 201 is achieved, which avoids uncertainty in the installation position and also avoids instability during clamping. The installation mechanism 2 completes the purpose of installing the clamping mechanism 3, which avoids the inability to replace and maintain the clamping mechanism 3 after it is fixed. When it is necessary to clamp the battery cell 5, in order to avoid damage to the battery cell 5 caused by rigid clamping, the clamping mechanism 3 installed inside the mechanism block 201 is activated, the battery cell 5 is placed in the middle of the inner side of the clamping body 1, and the telescopic rod 2 303 is activated. The telescopic rod 2 303 pushes the clamping block 304 to slide in the slide groove 302 towards the battery cell 5. The clamping block 304 drives the front rubber block 305 to press against the surface of the battery cell 5. By utilizing the soft characteristics of the rubber block 305, the purpose of flexibly clamping the battery cell 5 is achieved, thus avoiding damage to the battery cell 5. During the movement of the clamping block 304 in performing the clamping action, in order to prevent external impurities from entering the internal structure, the clamping block 304 drives the rubber strip 307 fixed in the rubber groove 306 to move synchronously. The outer surface of the rubber strip 307 is always in close contact with the inner wall surface of the slide groove 302. By utilizing the sealing characteristics of the rubber strip 307, the purpose of sealing the inside of the clamping mechanism 3 is achieved, thus preventing impurities from entering the inside of the clamping mechanism 3 and affecting the normal use of the telescopic rod 303.

Claims

1. A pressure forming fixture for double-sided tabs of a pouch cell, comprising: The clamping body (1), the mounting mechanism (2), the clamping mechanism (3), and the mechanism block (201); The feature is that a placement groove (4) is opened in the middle of the upper end of the clamping body (1), the mechanism block (201) is slidably connected to the inside of the placement groove (4), a space for placing the battery cell (5) is formed in the middle of the inner side of the clamping body (1), the mounting mechanism (2) is set in the left and right ends inside the clamping body (1), the mounting mechanism (2) includes a position groove (205) opened on the lower side outside the placement groove (4), the bottom end of the position groove (205) is fixedly connected to a rotator (206), and the upper end of the rotator (206) is... A fixed connection block (207) is provided, and a telescopic rod (208) is fixedly connected to the upper end of the connection block (207). A locking rod (209) is fixedly connected to the upper end of the telescopic rod (208). A guide groove (202) is opened in the middle of the lower end of the mechanism block (201). A rotating groove (203) is opened in the upper end of the guide groove (202). A locking groove (204) is opened in the lower end of the outer side of the rotating groove (203). The locking rod (209) is slidably connected to the inside of the guide groove (202) and cooperates with the inside of the rotating groove (203) and the locking groove (204).

2. The pressure forming fixture for double-sided tabs of a soft-pack battery cell according to claim 1, characterized in that, The clamping mechanism (3) is located inside the mechanism block (201). The clamping mechanism (3) includes a position groove (301) opened inside the mechanism block (201). A telescopic rod (303) is fixedly connected inside the position groove (301). A sliding groove (302) is opened on one side of the outer end of the position groove (301). A clamping block (304) is fixedly connected to the output end of the telescopic rod (303). The clamping block (304) is slidably connected inside the sliding groove (302). A rubber groove (306) is opened on the outer side of the clamping block (304). A rubber strip (307) is fixedly connected inside the rubber groove (306). A rubber block (305) is fixedly connected to the side of the clamping block (304) facing the battery cell (5).

3. The pressure forming fixture for double-sided tabs of a soft-pack battery cell according to claim 1, characterized in that, The placement slot (4) is located at the left and right ends inside the clamping body (1), and the mechanism block (201) is located at the left and right ends inside the placement slot (4). The mechanism block (201) is fixed and disassembled with the clamping body (1) through the installation mechanism (2).

4. The pressure forming fixture for double-sided tabs of a soft-pack battery cell according to claim 1, characterized in that, The cross-sectional shape of the guide groove (202) is adapted to the cross-sectional shape of the clamp rod (209), the inner diameter of the rotating groove (203) is larger than the maximum outer diameter of the clamp rod (209), and the cross-sectional shape of the clamp groove (204) is adapted to the cross-sectional shape of the clamp rod (209).

5. The pressure forming fixture for double-sided tabs of a soft-pack battery cell according to claim 1, characterized in that, When the mechanism block (201) slides along the placement groove (4) to the designated position, the locking rod (209) aligns with the guide groove (202), the telescopic rod (208) drives the locking rod (209) to slide along the guide groove (202), the rotator (206) drives the locking rod (209) to rotate in the rotating groove (203), and the telescopic rod (208) drives the locking rod (209) to engage in the locking groove (204) to fix the mechanism block (201).

6. The pressure forming fixture for double-sided tabs of a soft-pack battery cell according to claim 2, characterized in that, The second position slot (301) is located inside the front and rear ends of the mechanism block (201). The clamping block (304) moves back and forth along the slide groove (302) under the drive of the second telescopic rod (303), thereby driving the rubber block (305) to flexibly clamp the battery cell (5).

7. A pressure forming fixture for double-sided tabs of a soft-pack battery cell according to claim 2, characterized in that, The outer surface of the rubber strip (307) is tightly attached to the inner wall of the groove (302). The rubber strip (307) is used to seal the inside of the clamping mechanism (3) to prevent impurities from entering the position groove (301) and affecting the operation of the telescopic rod (303).

8. A pressure forming fixture for double-sided tabs of a soft-pack battery cell according to claim 1, characterized in that, The rotator (206) is a servo motor or a stepper motor, and the connecting block (207) is used to transmit the torque generated by the rotator (206) to the telescopic rod (208).

9. A pressure forming fixture for double-sided tabs of a soft-pack battery cell according to claim 2, characterized in that, Both the first telescopic rod (208) and the second telescopic rod (303) are electric push rods or cylinders. The first telescopic rod (208) is used to drive the clamping rod (209) to rise and fall, and the second telescopic rod (303) is used to drive the clamping block (304) to move horizontally.

10. A pressure forming fixture for double-sided tabs of a soft-pack battery cell according to claim 2, characterized in that, The rubber block (305) is made of flexible rubber and is used to prevent the clamping block (304) from causing rigid damage to the battery cell (5).

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