In-situ synchronous processing device for battery cell

Abstract

The utility model discloses an in-situ synchronous processing device for a battery cell, which belongs to the technical field of battery production equipment and comprises a hot pressing platform and a welding platform, and the hot pressing platform and the welding platform are adjacently arranged and form a working plane of the battery cell to be processed; a liftable pressing plate is arranged above the hot pressing platform, and the pressing plate and the hot pressing platform can abut against each other so as to press a body of a to-be-processed battery cell; a liftable welding head is arranged above the welding platform, and the welding head is matched with the welding platform to weld a tab of a battery cell to be processed; the welding device further comprises a first driving mechanism, and the first driving mechanism enables the pressing plate and the welding head to synchronously move close to or away from the working plane. According to the utility model, through the integrated design, two working procedures of battery cell hot pressing and tab ultrasonic welding are completed on one device, so that the number of times of battery cell transfer is effectively reduced, the damage risk in the transfer process is reduced, and the production efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production equipment technical field, concretely relates to a kind of battery cell in situ synchronous processing device. BACKGROUND

[0002] Lithium-ion battery is a kind of rechargeable battery, mainly relies on lithium ion to move between positive and negative pole and carries out charging and discharging.Lithium battery has the advantages of high energy density, small footprint, long cycle life, etc., and has been widely used in power battery, energy storage battery and consumer battery fields.

[0003] In the production process of lithium battery, the manufacturing of battery cell is one of the core links, and its quality directly determines the overall performance of the battery.In the traditional battery cell production process, the manufacturing of battery cell often involves multiple independent processes, such as glueing, battery cell cold and hot pressing, tab pre-welding and final welding, etc.The separate execution of these processes not only increases the complexity of the production process, but also brings many adverse factors.Specifically, after cold and hot pressing treatment, the battery cell needs to be transported to the welding workbench for tab welding, which not only consumes time and effort, but also increases the risk of damage to the battery cell during transportation due to collision or friction, especially for solid-state batteries without diaphragm, the gluing operation after lamination is more likely to directly damage the battery cell and affect the battery performance.

[0004] In addition, the independent execution of each process also leads to low production efficiency.Frequent material transfer, transportation and repositioning not only consumes a lot of time and labor, but also limits the overall production capacity of the production line, making it difficult to meet the growing demand for battery products in the market.At the same time, this decentralized production method also occupies more production space, increases the operating cost of the enterprise, and is not conducive to the long-term development and competitiveness of the enterprise.

[0005] In view of the above technical background and existing problems, it is necessary to design a battery cell in situ synchronous processing device to realize the combination of hot pressing and tab welding, which plays an important role in optimizing the battery cell production process, improving production efficiency and reducing production cost. INVENTION CONTENTS

[0006] In view of the above problems existing in the prior art, the utility model provides a battery cell in situ synchronous processing device, which is a combination device that can realize the combination of battery cell hot pressing and tab welding without moving the battery cell, to solve the problems of increased risk of battery cell transportation and collision in the existing battery cell manufacturing process and low production efficiency.In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The application discloses an in-situ synchronous processing device for an electric core, which comprises a hot-pressing platform and a welding platform, wherein the hot-pressing platform and the welding platform are arranged adjacently and form a working plane of the electric core to be processed; a liftable pressing plate is arranged above the hot-pressing platform, the pressing plate and the hot-pressing platform can abut against each other to press the body of the electric core to be processed; a liftable welding head is arranged above the welding platform, the welding head cooperates with the welding platform to weld the tab of the electric core to be processed; a first driving mechanism is further arranged, the first driving mechanism enables the pressing plate and the welding head to generate synchronous movement close to or away from the working plane, when the pressing plate and the hot-pressing platform hot-press and fix the electric core, the welding head cooperates with the welding platform to synchronously complete the welding of the tab.

[0008] Further, the hot-pressing platform is provided with an avoiding area, the avoiding area is a groove arranged on the hot-pressing platform, and the groove extends along a first direction.

[0009] Further, the groove penetrates the thickness direction of the hot-pressing platform; the hot-pressing platform is arranged in a liftable mode, a protruding block is further fixed outside the groove of the hot-pressing platform, and the protruding block is inserted into the groove when the hot-pressing platform moves to a predetermined position, so that the plane for placing the electric core is formed.

[0010] Further, a second driving mechanism is further arranged, the second driving mechanism enables the hot-pressing platform to generate lifting movement.

[0011] Further, the welding platform is fixedly connected with the hot-pressing platform, and the upper surfaces of the welding platform and the hot-pressing platform are flush.

[0012] Further, when the hot-pressing platform moves to a predetermined position, the upper surface of the welding platform is flush with the upper surface of the protruding block.

[0013] Further, the number of the welding heads is two, and the distance between the two welding heads is adjustable.

[0014] Further, a transmission mechanism is further arranged, the transmission mechanism is in transmission connection with the two welding heads.

[0015] Further, the transmission mechanism is a screw rod.

[0016] Further, the first driving mechanism and / or the second driving mechanism is one of a pneumatic cylinder, an electric push rod and a hydraulic cylinder.

[0017] The application has the following beneficial effects:

[0018] 1. The utility model provides an in-situ synchronous processing device for battery cells. Through integrated design, it completes the two processes of battery cell hot pressing and tab ultrasonic welding on one device, thereby effectively reducing the number of battery cell transfers, lowering the risk of damage during the transfer process, and significantly improving production efficiency, providing strong support for the large-scale and efficient production of lithium-ion batteries.

[0019] 2. This utility model provides an in-situ synchronous processing device for battery cells. It can directly fix the battery cells through hot pressing and simultaneously complete the ultrasonic welding of the tabs. This process eliminates the need for the additional step of post-lamination gluing, thus simplifying the production process. This solution is also suitable for diaphragm-less solid-state batteries, avoiding damage to the battery cells caused by post-lamination gluing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Fig. 1 This is a schematic structural diagram of a battery cell in-situ synchronous processing device provided by the present invention from a front perspective;

[0021] Fig. 2 This is a structural schematic diagram of a battery cell in-situ synchronous processing device provided by the present invention from the back view;

[0022] Fig. 3 This is a structural diagram of the welding platform and welding head provided by the utility model;

[0023] In the accompanying drawings: 1. base; 2. hot pressing platform; 3. welding platform; 4. pressing plate; 5. welding head; 6. first driving mechanism; 7. second driving mechanism; 11. protrusion; 21. groove. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0025] Example 1:

[0026] See attached Figs. 1-3 This embodiment provides a battery cell in-situ synchronous processing device, which aims to achieve rapid hot pressing of battery cells and precise welding of tabs, thereby improving production efficiency. Fig. 1As shown, the hot pressing platform 2 mainly includes a hot pressing platform 2, a welding platform 3, a liftable pressure plate 4, a liftable welding head 5, and a first drive mechanism 6. The hot pressing platform 2 and the welding platform 3 can be respectively arranged above the base 1, adjacent to each other and forming a working plane for the battery cell to be processed. A liftable pressure plate 4 controlled by the first drive mechanism 6 is located above the hot pressing platform 2. When lowered, the pressure plate 4 can closely cooperate with the hot pressing platform 2 to evenly compress the body of the battery cell to be processed placed on the hot pressing platform 2. The pressure plate 4 can be a pressure plate 4 structure used for hot pressing. The welding platform 3 is located on one side of the hot pressing platform 2. Above it, a liftable welding head 5 is located, also controlled by the first drive mechanism 6. When lowered, the welding head 5 can cooperate with the welding platform 3 to weld the tabs of the battery cell to be processed. The welding head 5 can be an ultrasonic welding head 5.

[0027] The first drive mechanism 6 causes the pressing plate 4 and the welding head 5 to produce synchronous movement close to or away from the working plane. When the pressing plate 4 and the hot pressing platform 2 are hot-pressing and fixing the battery cell, the welding head 5 cooperates with the welding platform 3 to synchronously complete the welding of the tabs, so that the body compression of the battery cell to be processed and the welding of the tabs are completed synchronously. In order to achieve the synchronous completion of the compression of the battery cell to be processed and the welding of the tabs, the first drive mechanism 6 in this embodiment can adopt a cylinder with dual output shafts, one output shaft is connected to the pressing plate 4, and the other output shaft is connected to the welding head 5, to ensure that the two can be raised and lowered synchronously. When the cylinder is started, the pressing plate 4 and the welding head 5 descend at the same time. While the pressing plate 4 presses the battery cell, the welding head 5 completes the welding of the tabs, which greatly improves production efficiency and the synchronization of operations. In this embodiment, the first drive mechanism 6 can also adopt a cylinder with a single output shaft, the output shaft is connected to the pressing plate 4, and the welding head 5 is connected to the pressing plate 4. When the cylinder is started, it drives the pressing plate 4 and the welding head 5 to move simultaneously.

[0028] The utility model provides an in-situ synchronous processing device for battery cells. Through integrated design, it completes two processes of battery cell hot pressing and tab ultrasonic welding on one device, thereby effectively reducing the number of battery cell transfers, lowering the risk of damage during the transfer process, and significantly improving production efficiency, providing strong support for the large-scale and efficient production of lithium-ion batteries.

[0029] Example 2:

[0030] See attached Figs. 1-3 On the basis of the first embodiment, the present embodiment further optimizes the device to improve the convenience of its operation. Specifically, an avoidance area is provided on the hot pressing platform 2, and the avoidance area is used for the gripper of the manipulator to pass through to clamp or place the battery cell. Fig. 2 As shown, the avoidance area can be a groove 21 opened on the hot pressing platform 2, and the groove 21 extends along the first direction, wherein, as shown in FIG. Fig. 1As shown, the first direction is the Y direction.

[0031] In one of the embodiments of the present application, the groove 21 runs through the thickness direction of the hot pressing platform 2, and a protrusion 11 that matches the groove 21 is fixed on the base 1. The protrusion 11 is inserted into the groove 21 when the hot pressing platform 2 moves to a predetermined position, and together form a flat and stable battery cell placement plane. In addition, the hot pressing platform 2 is designed to be liftable, and the hot pressing platform 2 can be lifted and lowered by the second drive mechanism 7. The second drive mechanism 7 can also use a cylinder, and its output shaft is connected and fixed to the side wall of the hot pressing platform 2, and the height of the hot pressing platform 2 can be adjusted as needed. It can be understood that in this embodiment, the specific structure of the first drive mechanism 6 and the second drive mechanism 7 is not limited. The first drive mechanism 6 and the second drive mechanism 7 can be implemented using existing technologies. The first drive mechanism 6 and / or the second drive mechanism 7 can also be one of a cylinder, an electric push rod or a hydraulic cylinder.

[0032] In the initial state, the height of the hot pressing platform 2 can be adjusted to be higher than the bump 11, that is, the bump 11 is not fully inserted into the groove 21, so that there is a position in the groove 21 for the robot to insert, which can facilitate the robot for clamping the battery cell to insert into the groove 21 and place the battery cell on the hot pressing platform 2. Before hot pressing, the height of the hot pressing platform 2 can be adjusted by the second driving mechanism 7, and the hot pressing platform 2 is lowered so that the bump 11 is inserted into the groove 21. The upper surface of the bump 11 is flush with the upper surface of the hot pressing platform 2, together forming a flat and stable battery cell placement surface, ensuring the hot pressing effect.

[0033] To achieve simultaneous cell compression and tab welding, in this embodiment, the welding head 5 is fixedly connected to the pressure plate 4, and the welding platform 3 is fixedly connected to the hot pressing platform 2, with their upper surfaces remaining flush. This design not only simplifies the structure but also ensures that the first drive mechanism 6 drives the pressure plate 4 and welding head 5 to move synchronously, and the second drive mechanism 7 drives the hot pressing platform 2 and welding platform 3 to move synchronously, allowing cell compression and tab welding to proceed simultaneously.

[0034] In one embodiment of the present application, another structural solution is also provided, in which the welding head 5 is still fixedly connected to the pressure plate 4, but the welding platform 3 is no longer fixedly connected to the hot pressing platform 2, but is directly fixed to the base 1. When the hot pressing platform 2 moves to a predetermined position, the upper surface of the welding platform 3 remains flush with the upper surface of the protrusion 11. When the hot pressing platform 2 descends under the action of the second driving mechanism 7, the protrusion 11 is inserted into the groove 21 to form a flat and stable battery cell placement plane; at this time, the height of the hot pressing platform 2 is exactly the same as that of the welding platform 3, ensuring that when the first driving mechanism 6 drives the pressure plate 4 and the welding head 5 to move synchronously, the battery cell compression and the tab welding are carried out simultaneously.

[0035] Example 3:

[0036] See attached Figs. 1-3 Based on the second embodiment, the present embodiment is different from the second embodiment in that the welding platform 3 can be set to be integrally formed, the number of welding heads 5 is set to two, and the distance between the two welding heads 5 can be adjusted to accommodate different sizes of battery cells and tabs. Fig. 3 As shown, specifically, the two welding heads 5 are connected via a transmission mechanism. For example, the transmission mechanism can be a screw, and the transmission mechanism is threadedly connected to the welding heads 5 .

[0037] The workflow is:

[0038] After lamination, the battery cells to be processed are transferred to the hot pressing platform 2 by a manipulator. The manipulator is embedded in the groove 21 of the lower pressure plate 4 of the hot pressing platform 2. After the battery cells are placed on the hot pressing platform 2, the manipulator is taken out. The pressure plate 4 descends so that the bumps 11 fill the position of the groove 21 on the hot pressing platform 2 to ensure that the pressing surface of the hot pressing platform 2 is flat. At this time, the battery cells are initially placed on the hot pressing platform 2, and the tabs are initially placed on the welding platform 3. The transmission mechanism is then used to adjust the positions of the two welding heads 5 so that they correspond to the welding positions of the two tabs. After adjustment, the pressure plate 4 and the welding head 5 move downward to start hot pressing and hi-pot testing, and perform ultrasonic welding of the tabs. After hot pressing, the PVDF on the pole piece softens under the action of temperature and pressure, bonding the positive and negative pole pieces, and fixing the battery cells.

[0039] Through the above embodiments, the in-situ synchronous processing device for battery cells provided by the present invention realizes the synchronous hot pressing of battery cells and welding of tabs, thereby improving production efficiency and ensuring welding quality.

[0040] 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 to 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0041] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0042] In the description of the present invention, “plurality” means two or more.

[0043] In the description of the utility model, the first feature is "above" or "below" the second feature, which can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0044] In the description of the utility model, the first feature is "above", "upper" and "upper" of the second feature, which includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height.

[0045] In the description of the utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A battery cell in-situ synchronous processing device, characterized by: The invention comprises a hot pressing platform (2) and a welding platform (3), wherein the hot pressing platform (2) and the welding platform (3) are arranged adjacent to each other and form a working plane for the battery cell to be processed; a liftable pressing plate (4) is provided above the hot pressing platform (2), and the pressing plate (4) and the hot pressing platform (2) can abut against each other to press the body of the battery cell to be processed; a liftable welding head (5) is provided above the welding platform (3), and the welding head (5) cooperates with the welding platform (3) to weld the tabs of the battery cell to be processed; and the invention also comprises a first driving mechanism (6), wherein the first driving mechanism (6) causes the pressing plate (4) and the welding head (5) to generate synchronous movement toward or away from the working plane, and when the pressing plate (4) and the hot pressing platform (2) hot press and fix the battery cell, the welding head (5) cooperates with the welding platform (3) to synchronously complete the welding of the tabs.

2. The battery cell in-situ synchronous processing device according to claim 1, characterized in that: An escape zone is provided on the hot pressing platform (2), the escape zone being a groove (21) opened on the hot pressing platform (2), and the groove (21) extends along a first direction.

3. The battery cell in-situ synchronous processing device according to claim 2, characterized in that: The groove (21) runs through the thickness direction of the hot pressing platform (2); the hot pressing platform (2) can be raised and lowered, and a protrusion (11) is fixed outside the groove of the hot pressing platform (2); the protrusion (11) is inserted into the groove (21) when the hot pressing platform (2) moves to a predetermined position, so as to form a plane for placing the battery core.

4. The battery cell in-situ synchronous processing device according to claim 3, characterized in that: It also includes a second driving mechanism (7), which enables the hot pressing platform (2) to generate a lifting movement.

5. The battery cell in-situ synchronous processing device according to claim 1, characterized in that: The welding platform (3) is fixedly connected to the hot pressing platform (2), and the welding platform (3) is flush with the upper surface of the hot pressing platform (2).

6. The battery cell in-situ synchronous processing device according to claim 3, characterized in that: When the hot pressing platform (2) moves to a predetermined position, the welding platform (3) is flush with the upper surface of the bump (11).

7. The battery cell in-situ synchronous processing device according to claim 1, characterized in that: The number of the welding heads (5) is set to two, and the distance between the two welding heads (5) is adjustable.

8. The battery cell in-situ synchronous processing device according to claim 7, characterized in that: It also comprises a transmission mechanism, which is in transmission connection with the two welding heads (5).

9. The battery cell in-situ synchronous processing device according to claim 8, characterized in that: The transmission mechanism is a screw.

10. The battery cell in-situ synchronous processing device according to claim 4, characterized in that: The first driving mechanism (6) and / or the second driving mechanism (7) is one of a pneumatic cylinder, an electric push rod or a hydraulic cylinder.

Images