A cell heat sealer

Abstract

The application discloses an electric core heat sealing edge device, which comprises a base, a first driving mechanism and a heat sealing edge mechanism. The base is movably arranged on an external frame along a first horizontal direction. The heat sealing edge mechanism is arranged on the base and is used for implementing heat sealing edge on the electric core conveyed by a conveying mechanism. The conveying mechanism is used for conveying materials along the first horizontal direction. The materials comprise a bottom film and a plurality of electric cores. The plurality of electric cores are arranged on the upper surface of the bottom film along the first horizontal direction. The driving end of the first driving mechanism is connected with the base. The first driving mechanism is used for driving the base to move reciprocally along the first horizontal direction. In the process of implementing heat sealing edge on the electric core by the heat sealing edge mechanism, the first driving mechanism drives the base to convey forward synchronously with the materials. The electric core heat sealing edge device realizes the effects of continuously conveying the materials and implementing heat sealing edge on the electric core following the materials. The heat sealing edge efficiency of the electric core is improved under the premise of guaranteeing the heat sealing edge effect of the electric core.

Description

Technical Field

[0001] This application belongs to the field of new energy battery processing equipment technology, and in particular relates to a cell heat sealing device. Background Technology

[0002] In the processing of new energy batteries (such as lithium batteries, zinc batteries, etc., which are composed of multiple cells), a heat sealing device is needed to heat and seal the outer edge of the cell in order to encapsulate the cell.

[0003] Heat sealing devices typically include an upper heat-pressing assembly and a lower heat-pressing assembly. These assemblies can be close to or far apart. A conveying assembly transports the battery cell to be heat-sealed between the upper and lower heat-pressing assemblies. The upper and lower heat-pressing assemblies then approach and close together to heat and seal the battery cell between them. However, to ensure effective heat sealing, existing heat sealing devices require the upper and lower heat-pressing assemblies to remain closed for a certain period. During this time, the battery cell's transport movement must stop, leading to the conveying assembly needing to periodically stop and start, resulting in low heat sealing efficiency. Utility Model Content

[0004] The purpose of this application is to provide a cell heat sealing device to solve the problem of low heat sealing efficiency in existing cell heat sealing devices.

[0005] To achieve this objective, the following technical solution is adopted in this application:

[0006] This application discloses a cell heat sealing device, which includes a base, a first driving mechanism, and a heat sealing mechanism, wherein:

[0007] The base is reciprocally mounted on the external frame in a first horizontal direction. The heat sealing mechanism is mounted on the base and is configured to heat seal the battery cells conveyed by the conveying mechanism. The conveying mechanism is configured to convey materials in the first horizontal direction. The materials include a bottom film and multiple battery cells, which are spaced apart on the upper surface of the bottom film in the first horizontal direction.

[0008] The drive end of the first drive mechanism is connected to the base. The first drive mechanism is configured to drive the base to reciprocate along the first horizontal direction. During the heat sealing process of the heat sealing mechanism for the battery cell, the first drive mechanism drives the base to move forward synchronously with the material.

[0009] The battery cell heat sealing device proposed in this application, during the heat sealing process of the battery cell, uses a first drive mechanism to drive the base to move forward synchronously with the material, so that the heat sealing mechanism remains relatively stationary with the material conveyed by the conveying mechanism. After the heat sealing mechanism completes the heat sealing, the first drive mechanism drives the base to move backward, so as to bring the heat sealing mechanism back to the initial position and perform heat sealing on the next batch of battery cells. Compared with the existing heat sealing device, which requires the conveying mechanism to start and stop frequently, the conveying mechanism does not need to stop conveying, realizing the effect of continuous material conveying and heat sealing the battery cell by following the material. While ensuring the heat sealing effect of the battery cell, the heat sealing efficiency of the battery cell is improved.

[0010] Optionally, the heat-sealing mechanism includes an upper heat-sealing assembly and a lower heat-sealing assembly, with the upper heat-sealing assembly positioned above the lower heat-sealing assembly. Material passes between the upper and lower heat-sealing assemblies, wherein:

[0011] The upper heat sealing assembly includes a mounting plate, a second drive mechanism, an upper lifting plate, and an upper heat sealing part. The mounting plate is fixedly installed above the base, and the upper lifting plate is movably installed below the mounting plate. The fixed end of the second drive mechanism is installed on the mounting plate, and the drive end of the second drive mechanism is connected to the upper lifting plate. The second drive mechanism is configured to drive the upper lifting plate to move up and down. The upper heat sealing part is located on the bottom surface of the upper lifting plate.

[0012] The lower heat sealing assembly includes a third drive mechanism, a lower lifting plate, and a lower heat sealing part. The lower lifting plate is movably mounted on the base, the lower heat sealing part is mounted on the top surface of the lower lifting plate, the fixed end of the third drive mechanism is mounted on the base, and the driving end of the third drive mechanism is connected to the lower lifting plate. The third drive mechanism is configured to drive the lower lifting plate to move up and down.

[0013] The second drive mechanism drives the upper lifting plate to descend and the third drive mechanism drives the lower lifting plate to rise, so as to bring the upper heat sealing part and the lower heat sealing part together. Through the cooperation of the upper heat sealing part and the lower heat sealing part, the battery cell on the material is heat-sealed.

[0014] The upper heat sealing part is driven to rise and fall by the cooperation of the second drive mechanism, the upper lifting plate and the upper heat sealing part, and the lower heat sealing part is driven to rise and fall by the cooperation of the third drive mechanism, the lower lifting plate and the lower heat sealing part. Then, the upper heat sealing part and the lower heat sealing part work together to heat seal the battery cells on the material, providing a heat sealing mechanism with simple structure and stable and reliable operation.

[0015] Optionally, the upper heat-sealing section includes a first upper heat-pressing unit and an upper pressing unit arranged side by side along a first horizontal direction, and the lower heat-sealing section includes a lower pressing unit and a first lower heat-pressing unit arranged side by side along a first horizontal direction, wherein:

[0016] The first upper hot pressing unit is set up in correspondence with the lower pressing unit. The first upper hot pressing unit is configured to cooperate with the lower pressing unit to perform hot pressing on the outer edge of the upper surface of the cell.

[0017] The upper pressing unit is set up in correspondence with the first lower hot pressing unit. The first lower hot pressing unit is configured to cooperate with the upper pressing unit to perform hot pressing on the outer edge of the lower surface of the cell.

[0018] By cooperating with the first upper hot pressing unit and the lower pressing unit, hot pressing is achieved on the outer edge of the upper surface of the battery cell; by cooperating with the upper pressing unit and the first lower hot pressing unit, hot pressing is achieved on the outer edge of the lower surface of the battery cell, thereby achieving heat sealing of the outer edge of the battery cell; a step-by-step method for heat sealing the battery cell is provided, avoiding damage to the battery cell caused by excessively high temperature at the same position due to simultaneous heating on both sides during the heat sealing process.

[0019] Optionally, the first upper hot pressing unit includes a first upper heating plate and at least one first hot pressing frame. The first hot pressing frame protrudes from the bottom surface of the first upper heating plate. Each first hot pressing frame corresponds to one battery cell. An upper cavity for avoiding the battery cell is formed inside the first hot pressing frame. The first upper heating plate is configured to heat the first hot pressing frame. The upper pressing unit includes an upper pad and at least one upper pressing frame. The upper pressing frame protrudes from the bottom surface of the upper pad. Each upper pressing frame corresponds to one battery cell. An upper cavity for avoiding the battery cell is formed inside the upper pressing frame. The bottom surfaces of the first hot pressing frame and the upper pressing frame are on the same horizontal plane.

[0020] The first lower hot pressing unit includes a first lower heating plate and at least one second hot pressing frame. The second hot pressing frame protrudes from the top surface of the first lower heating plate. Each second hot pressing frame corresponds to one battery cell. A lower cavity for avoiding the battery cell is formed inside the second hot pressing frame. The first lower heating plate is configured to heat the second hot pressing frame. The lower pressing unit includes a lower pad and at least one lower pressing frame. The lower pressing frame protrudes from the top surface of the lower pad. Each lower pressing frame corresponds to one battery cell. A lower cavity for avoiding the battery cell is formed inside the lower pressing frame. The bottom surfaces of the second hot pressing frame and the lower pressing frame are on the same horizontal plane.

[0021] The first hot-pressing frame is configured to cooperate with the lower pressing frame to perform hot pressing on the outer edge of the upper surface of the battery cell; the second hot-pressing frame is configured to cooperate with the upper pressing frame to perform hot pressing on the outer edge of the lower surface of the battery cell.

[0022] When the upper and lower heat-sealing parts are closed, the lower pressing frame supports the outer edge of the lower surface of the battery cell, and the first heat-sealing frame presses against the outer edge of the upper surface of the battery cell, thereby pressing the outer edge of the battery cell onto the lower pressing frame. The first upper heating plate heats the first heat-sealing frame, thereby hot-pressing the outer edge of the upper surface of the battery cell. The second heat-sealing frame supports the outer edge of the lower surface of the battery cell, and the upper pressing frame presses against the outer edge of the upper surface of the battery cell, thereby pressing the outer edge of the battery cell onto the second heat-sealing frame. The first lower heating plate heats the second heat-sealing frame, thereby hot-pressing the outer edge of the lower surface of the battery cell. This provides an upper and lower heat-sealing part with a simple structure, easy implementation, and good heat-pressing effect.

[0023] Optionally, the first hot-pressing frame, the upper pressing frame, the second hot-pressing frame, and the lower pressing frame have the same structure. The heating end of the first hot-pressing frame is set to correspond to the four adjacent outer edges of the battery cell, or the heating end of the first hot-pressing frame is set to correspond to the three adjacent outer edges of the battery cell.

[0024] By setting up the first hot-pressing frame, the upper pressing frame, the second hot-pressing frame, and the lower pressing frame, the cell hot-sealing device can meet the two different hot-sealing process requirements of the cell, namely, it can meet the requirements of hot-sealing the four sides of the cell and hot-sealing the three sides of the cell.

[0025] Optionally, an upper elastic pressing component extending downwards is provided in the upper cavity, and a lower elastic pressing component extending upwards is provided in the lower cavity. The upper elastic pressing component is configured to press the upper surface of the battery cell before heat sealing the edge, and the lower elastic pressing component is configured to press the lower surface of the battery cell before heat sealing the edge.

[0026] By setting an upper elastic clamping component extending from the upper cavity in the upper cavity and a lower elastic clamping component extending from the lower cavity in the lower cavity, the battery cell can be clamped by the cooperation of the upper and lower elastic clamping components before heat sealing, thereby preventing the battery cell from shifting during the heat sealing process and improving the accuracy of heat sealing.

[0027] Optionally, the upper heat sealing part includes a second upper heating plate and at least one third hot pressing frame. The third hot pressing frame protrudes from the bottom surface of the second upper heating plate. Each third hot pressing frame corresponds to a battery cell. An upper cavity for avoiding the battery cell is formed inside the third hot pressing frame. The second upper heating plate is configured to heat the third hot pressing frame.

[0028] The lower heat sealing section includes a second lower heating plate and at least one fourth hot pressing frame. The fourth hot pressing frame protrudes from the top surface of the second lower heating plate. Each fourth hot pressing frame corresponds to a third hot pressing frame. The fourth hot pressing frame is adapted to the third hot pressing frame. A lower cavity for avoiding the battery cell is formed inside the fourth hot pressing frame. The second lower heating plate is configured to heat the fourth hot pressing frame.

[0029] The first hot-pressing frame is configured to hot-press the outer edge of the upper surface of the battery cell, and the second hot-pressing frame is configured to hot-press the outer edge of the lower surface of the battery cell while the first hot-pressing frame hot-presses the battery cell, thereby hot-sealing the battery cell.

[0030] When the upper and lower heat-sealing parts are closed, the fourth heat-sealing frame supports the outer edge of the lower surface of the battery cell, and the third heat-sealing frame presses on the outer edge of the upper surface of the battery cell, thereby pressing the outer edge of the battery cell tightly onto the fourth heat-sealing frame. The second upper heating plate and the second lower heating plate simultaneously heat the third and fourth heat-sealing frames. The heat sealing of the outer edges of the upper and lower surfaces of the battery cell can be completed in one operation, improving the heat sealing efficiency of the battery cell.

[0031] Optionally, a number of guide posts are provided between the mounting plate and the base. The upper end of the guide post is fixedly connected to the mounting plate, and the lower end of the guide post is fixedly connected to the base. A number of guide sleeves are provided on both the upper and lower lifting plates, and each guide sleeve corresponds to one guide post. The upper and lower lifting plates are both vertically and vertically inserted through the corresponding number of guide posts via the guide sleeves.

[0032] By setting guide columns and guide sleeves, the lifting and lowering of the upper and lower lifting plates are guided, thus improving the stability of the lifting and lowering of the upper and lower lifting plates.

[0033] Optionally, the cell heat sealing device further includes a first limiting component and a second limiting component, wherein:

[0034] The first limiting component is disposed between the base and the upper lifting plate, and the first limiting component is configured to limit the descent stroke of the upper lifting plate;

[0035] The second limiting component is disposed between the mounting plate and the lower lifting plate, and is configured to limit the upward stroke of the lower lifting plate.

[0036] By setting the first limiting component, the downward stroke of the upper lifting plate is limited; by setting the second limiting component, the upward stroke of the lower lifting plate is limited, thereby achieving precise control of pressure during heat sealing and avoiding damage to the battery cell due to excessive pressure or affecting the heat sealing effect due to insufficient pressure.

[0037] Optionally, the cell heat sealing device further includes a guide support extending along a first horizontal direction, the guide support being disposed on the tab-facing side of the cell, and the guide support being configured to guide and support the tab of the cell.

[0038] By setting up guide supports, the tabs of the battery cell are guided and supported, preventing the tabs from bending during the heat sealing process. Attached Figure Description

[0039] Figure 1 This is a first-view perspective three-dimensional structural schematic diagram of the cell heat sealing device provided in the embodiments of this application;

[0040] Figure 2 This is a second-view perspective three-dimensional structural schematic diagram of the cell heat sealing device provided in the embodiments of this application;

[0041] Figure 3 This is a three-dimensional structural schematic diagram of the upper heat sealing assembly of the cell heat sealing edge device provided in the embodiments of this application;

[0042] Figure 4 This is a three-dimensional structural diagram of the lower heat-sealing component of the cell heat-sealing edge device provided in the embodiments of this application.

[0043] Figures 1 to 4 The following reference numerals are included:

[0044] Base 10;

[0045] First drive mechanism 20: linear module 21, guide assembly 22, linear guide rail 220, slider 221;

[0046] Heat sealing mechanism 30: upper heat sealing assembly 31, mounting plate 310, second drive mechanism 311, upper lifting plate 312, upper heat sealing part 313, first upper heating plate 3130, first heat pressing frame 3131, upper pad 3132, upper pressing frame 3133, lower heat sealing assembly 32, third drive mechanism 320, lower lifting plate 321, lower heat sealing part 322, first lower heating plate 3220, second heat pressing frame 3221, lower pad 3222, lower pressing frame 3223, upper cavity 33, lower cavity 34, heat insulation plate 35;

[0047] Upper elastic clamping assembly 40, lower elastic clamping assembly 41, guide post 42, guide sleeve 43, first upper limit rod 44, first lower limit rod 45, second upper limit rod 46, second lower limit rod 47, guide support member 48. Detailed Implementation

[0048] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] In the processing of new energy batteries (such as lithium batteries and zinc batteries, which are composed of multiple cells), a heat-sealing device is needed to heat and seal the outer edges of the cells to encapsulate them. A heat-sealing device typically includes an upper heat-pressing assembly and a lower heat-pressing assembly. These assemblies can be close to or far apart. A conveying assembly transports the cell to be heat-sealed between the upper and lower heat-pressing assemblies, which then approach and close to heat and seal the cell between them. However, to ensure effective heat sealing, existing heat-sealing devices require the upper and lower heat-pressing assemblies to remain closed for a certain period. During this time, the cell's transport must stop, leading to periodic stopping and starting of the conveying assembly, resulting in low heat-sealing efficiency.

[0050] Therefore, this application proposes a cell heat sealing device; please refer to [link / reference]. Figure 1 and Figure 2 As shown, the cell heat sealing device proposed in this application embodiment includes a base 10, a first driving mechanism 20, and a heat sealing mechanism 30. The base 10 can be driven along a first horizontal direction ( Figure 1 The heat sealing mechanism 30 is mounted on the base 10 and is reciprocatingly mounted on the external frame in the X direction. The heat sealing mechanism 30 is mounted on the base 10 and is configured to heat seal the battery cells conveyed by the conveying mechanism (not shown in the figure). The conveying mechanism is configured to convey materials along the first horizontal direction. The materials include a bottom film and multiple battery cells. The multiple battery cells are spaced apart on the upper surface of the bottom film along the first horizontal direction. The drive end of the first drive mechanism 20 is connected to the base 10 and is configured to drive the base 10 to reciprocate along the first horizontal direction. During the heat sealing process of the battery cells by the heat sealing mechanism 30, the first drive mechanism 20 drives the base 10 to move forward synchronously with the materials.

[0051] Specifically, the conveying mechanism adopts two sets of conveying rollers, which are spaced apart along the first horizontal direction. The base 10 is located between the two sets of conveying rollers. Each set of conveying rollers includes a rotatable upper conveying roller and a lower conveying roller. There is a conveying gap between the upper conveying roller and the lower conveying roller for material to pass through. Through the cooperation of the upper conveying roller and the lower conveying roller, the material is conveyed forward.

[0052] Specifically, the first drive mechanism 20 includes a linear module 21 and a guide assembly 22, wherein: the linear module 21 is a ball screw type linear module, and the screw nut of the linear module 21 is fixedly connected to the base 10; the guide assembly 22 is disposed between the base 10 and the external frame to improve the stability of the base 10 moving along the first horizontal direction. The guide assembly 22 includes a linear guide rail 220 and a slider 221. The linear guide rail 220 is fixedly laid on the external frame extending along the first horizontal direction, and the slider 221 is slidably fitted on the linear guide rail 220 and fixedly connected to the base 10.

[0053] In the process of heat sealing the battery cells by the heat sealing mechanism 30, the battery cell heat sealing device proposed in this application uses the first drive mechanism 20 to drive the base 10 to follow the material and convey it forward synchronously. This keeps the heat sealing mechanism 30 relatively stationary with the material conveyed by the conveying mechanism. After the heat sealing mechanism 30 completes the heat sealing, the first drive mechanism 20 drives the base 10 to move backward, so as to bring the heat sealing mechanism 30 back to the initial position and perform heat sealing on the next batch of battery cells. Compared with the existing heat sealing device, which requires the conveying mechanism to start and stop frequently, the conveying mechanism does not need to stop conveying. This achieves the effect of continuous material conveying and heat sealing the battery cells by following the material. While ensuring the heat sealing effect of the battery cells, the heat sealing efficiency of the battery cells is improved.

[0054] In one embodiment, the heat sealing mechanism 30 includes an upper heat sealing assembly 31 and a lower heat sealing assembly 32. The upper heat sealing assembly 31 is disposed above the lower heat sealing assembly 32, and the material passes between the upper heat sealing assembly 31 and the lower heat sealing assembly 32. The upper heat sealing assembly 31 includes a mounting plate 310, a second drive mechanism 311, an upper lifting plate 312, and an upper heat sealing part 313. The mounting plate 310 is fixedly mounted above the base 10, and the upper lifting plate 312 is movably mounted below the mounting plate 310. The fixed end of the second drive mechanism 311 is mounted on the mounting plate 310, and the drive end of the second drive mechanism 311 is connected to the upper lifting plate 312. The second drive mechanism 311 is configured to drive the upper lifting plate 312 to move up and down. The upper heat sealing part 313 is disposed on the upper lifting plate 310. The bottom surface of 12; the lower heat sealing assembly 32 includes a third drive mechanism 320, a lower lifting plate 321 and a lower heat sealing part 322. The lower lifting plate 321 is movably mounted on the base 10, and the lower heat sealing part 322 is mounted on the top surface of the lower lifting plate 321. The fixed end of the third drive mechanism 320 is mounted on the base 10, and the drive end of the third drive mechanism 320 is connected to the lower lifting plate 321. The third drive mechanism 320 is configured to drive the lower lifting plate 321 to rise and fall. The second drive mechanism 311 drives the upper lifting plate 312 to fall and the third drive mechanism 320 drives the lower lifting plate 321 to rise, so as to drive the upper heat sealing part 313 and the lower heat sealing part 322 to close together. The upper heat sealing part 313 and the lower heat sealing part 322 cooperate to heat seal the edge of the battery cell on the material.

[0055] Specifically, the second drive mechanism 311 includes at least one first cylinder, which is vertically fixed on the mounting plate 310, with the piston rod of the first cylinder facing downward and connected to the upper lifting plate 312; the third drive mechanism 320 includes at least one second cylinder, which is vertically fixed on the base 10, with the piston rod of the second cylinder facing upward and connected to the lower lifting plate 321.

[0056] As can be seen, the upper heat-sealing part 313 is driven to rise and fall through the cooperation of the second driving mechanism 311, the upper lifting plate 312, and the upper heat-sealing part 313; the lower heat-sealing part 322 is driven to rise and fall through the cooperation of the third driving mechanism 320, the lower lifting plate 321, and the lower heat-sealing part 322; and the upper heat-sealing part 313 and the lower heat-sealing part 322 work together to heat-seal the battery cells on the material, providing a simple and stable heat-sealing mechanism 30. Figure 2 As shown, in one embodiment, two second drive mechanisms 311 are provided. When the length of the material being hot-pressed simultaneously is relatively long or the number of materials being hot-pressed simultaneously is large, the cooperation of multiple second drive mechanisms 311 can ensure the pressing effect of each material in each area. Optionally, the second drive mechanism 311 is a cylinder or a motor.

[0057] In one embodiment, the upper heat-sealing part 313 includes a first upper heat-pressing unit and an upper pressing unit arranged side by side along a first horizontal direction, and the lower heat-sealing part 322 includes a lower pressing unit and a first lower heat-pressing unit arranged side by side along a first horizontal direction. The first upper heat-pressing unit and the lower pressing unit are arranged correspondingly. The first upper heat-pressing unit is configured to cooperate with the lower pressing unit to perform heat pressing on the outer edge of the upper surface of the battery cell. The upper pressing unit and the first lower heat-pressing unit are arranged correspondingly. The first lower heat-pressing unit is configured to cooperate with the upper pressing unit to perform heat pressing on the outer edge of the lower surface of the battery cell.

[0058] As can be seen, the cooperation of the first upper hot pressing unit and the lower pressing unit realizes the hot pressing of the outer edge of the upper surface of the battery cell; the cooperation of the upper pressing unit and the first lower hot pressing unit realizes the hot pressing of the outer edge of the lower surface of the battery cell, thereby realizing the hot sealing of the outer edge of the battery cell; a step-by-step hot sealing method for the battery cell is provided, avoiding damage to the battery cell caused by excessively high temperature at the same position of the battery cell due to simultaneous heating on both sides during the hot sealing process.

[0059] Please see Figure 3 and Figure 4As shown, in one embodiment, the first upper hot pressing unit includes a first upper heating plate 3130 and at least one first hot pressing frame 3131. The first hot pressing frame 3131 protrudes from the bottom surface of the first upper heating plate 3130. Each first hot pressing frame 3131 corresponds to one battery cell. An upper cavity 33 for avoiding the battery cell is formed within the first hot pressing frame 3131. The first upper heating plate 3130 is configured to heat the first hot pressing frame 3131. The upper pressing unit includes an upper pad 3132 and at least one upper pressing frame 3133. The upper pressing frame 3133 protrudes from the bottom surface of the upper pad 3132. Each upper pressing frame 3133 corresponds to one battery cell. An upper cavity 33 for avoiding the battery cell is formed within the upper pressing frame 3133. The bottom surfaces of the first hot pressing frame 3131 and the upper pressing frame 3133 are on the same horizontal plane. The first lower hot pressing unit includes a first lower heating plate 3220 and at least one second hot pressing frame 322. 1. A second hot-pressing frame 3221 protrudes from the top surface of the first lower heating plate 3220. Each second hot-pressing frame 3221 corresponds to one battery cell. A lower cavity 34 is formed within the second hot-pressing frame 3221 to avoid the battery cell. The first lower heating plate 3220 is configured to heat the second hot-pressing frame 3221. The lower pressing unit includes a lower pad 3222 and at least one lower pressing frame 3223. The lower pressing frame 3223 protrudes from the top surface of the lower pad 3222. In this configuration, each lower pressing frame 3223 corresponds to one battery cell. A lower cavity 34 is formed within the lower pressing frame 3223 to allow the battery cell to pass. The bottom surfaces of the second hot pressing frame 3221 and the lower pressing frame 3223 are on the same horizontal plane. The first hot pressing frame 3131 is configured to cooperate with the lower pressing frame 3223 to perform hot pressing on the outer edge of the upper surface of the battery cell. The second hot pressing frame 3221 is configured to cooperate with the upper pressing frame 3133 to perform hot pressing on the outer edge of the lower surface of the battery cell.

[0060] Specifically, four of each of the first hot-pressing frame 3131, upper pressing frame 3133, lower pressing frame 3223, and second hot-pressing frame 3221 are provided, enabling the cell heat-sealing device to heat-seal eight cells at a time, thus improving the efficiency of heat-sealing. In one embodiment, during the continuous feeding of cells, the first hot-pressing frame 3131 and upper pressing frame 3133 work together to heat-seal the upper surface of four cells. The heat-sealing mechanism then moves back to the position of four cells. Then, the first hot-pressing frame 3131 and upper pressing frame 3133 work together to heat-seal the upper surface of the next group of four cells. Simultaneously, the lower pressing frame 3223 and second hot-pressing frame 3221 work together to heat-seal the lower surface of the four cells that have already undergone upper surface heat-sealing, ultimately achieving double-sided heat sealing of the cells.

[0061] Specifically, heat insulation plates 35 are installed between the first upper heating plate 3130 and the upper lifting plate 312, and between the first lower heating plate 3220 and the lower lifting plate 321.

[0062] Specifically, both the first upper heating plate 3130 and the first lower heating plate 3220 are electrically heated, and the heating element used for electric heating can be either an electric heating tube or an electric heating ceramic plate.

[0063] As can be seen, when the upper heat-sealing part 313 and the lower heat-sealing part 322 are closed, the lower pressing frame 3223 supports the outer edge of the lower surface of the battery cell, and the first hot pressing frame 3131 presses on the outer edge of the upper surface of the battery cell, thereby pressing the outer edge of the battery cell onto the lower pressing frame 3223. The first hot pressing frame 3131 is heated by the first upper heating plate 3130, thereby hot-pressing the outer edge of the upper surface of the battery cell. The second hot pressing frame 3221 supports the outer edge of the lower surface of the battery cell, and the upper pressing frame 3133 presses on the outer edge of the upper surface of the battery cell, thereby pressing the outer edge of the battery cell onto the second hot pressing frame 3221. The second hot pressing frame 3221 is heated by the first lower heating plate 3220, thereby hot-pressing the outer edge of the lower surface of the battery cell. This provides an upper heat-sealing part 313 and a lower heat-sealing part 322 with a simple structure, easy implementation, and good hot-pressing effect. Optionally, the side of the first hot-pressing frame 3131 and the second hot-pressing frame 3221 that contacts the battery cell is made of an elastic heat-insulating material, such as heat-resistant rubber.

[0064] In one implementation, the first hot-pressing frame 3131, the upper pressing frame 3133, the second hot-pressing frame 3221, and the lower pressing frame 3223 have the same structure. The heating end of the first hot-pressing frame 3131 is arranged corresponding to the four adjacent outer edges of the battery cell, or the heating end of the first hot-pressing frame 3131 is arranged corresponding to the three adjacent outer edges of the battery cell.

[0065] By configuring the first hot-pressing frame 3131, the upper pressing frame 3133, the second hot-pressing frame 3221, and the lower pressing frame 3223, the battery cell heat sealing device can meet the requirements of two different heat sealing processes for the battery cell. It can meet the requirements of heat sealing the four sides of the battery cell, as well as the requirements of heat sealing the three sides of the battery cell. Of course, the shapes of the first hot-pressing frame 3131, the upper pressing frame 3133, the second hot-pressing frame 3221, and the lower pressing frame 3223 can be adjusted according to the actual process requirements and the shape of the material to be heat-pressed. Here, we will not impose any restrictions on the specific shapes of the first hot-pressing frame 3131, the upper pressing frame 3133, the second hot-pressing frame 3221, and the lower pressing frame 3223.

[0066] In one embodiment, an upper elastic pressing assembly 40 extending downward from the upper cavity 33 is provided inside the upper cavity 33, and a lower elastic pressing assembly 41 extending upward from the lower cavity 34 is provided inside the lower cavity 34. The upper elastic pressing assembly 40 is configured to press the upper surface of the battery cell before heat sealing the edge of the battery cell, and the lower elastic pressing assembly 41 is configured to press the lower surface of the battery cell before heat sealing the edge of the battery cell.

[0067] Specifically, the upper elastic pressing assembly 40 includes an upper pressing rod and an upper elastic element. The upper end of the upper elastic element is fixedly installed on the upper lifting plate 312, and the lower end of the upper elastic element is installed on the upper end of the upper pressing rod. The lower end of the upper pressing rod extends out of the upper cavity 33. The upper pad 3132, the first upper heating plate 3130, and the heat insulation plate 35 are provided with through holes for the upper pressing rod to pass through. The lower elastic pressing assembly 41 includes a lower pressing rod and a lower elastic element. The lower end of the lower elastic element is fixedly installed on the lower lifting plate 321, and the upper end of the lower elastic element is installed on the lower end of the lower pressing rod. The lower end of the lower pressing rod extends out of the lower cavity 34. The lower pad 3222, the first lower heating plate 3220, and the heat insulation plate 35 are provided with through holes for the lower pressing rod to pass through.

[0068] Specifically, both the upper and lower elastic components are springs.

[0069] As can be seen, by providing an upper elastic pressing component 40 extending out of the upper cavity 33 in the upper cavity 33 and a lower elastic pressing component 41 extending out of the lower cavity 34 in the lower cavity 34, the upper and lower surfaces of the battery cell can be pressed together by the cooperation of the upper elastic pressing component 40 and the lower elastic pressing component 41 before the battery cell is heat-sealed, thereby preventing the battery cell from shifting during the heat-sealing process and improving the accuracy of the heat-sealing.

[0070] In one embodiment, the upper heat-sealing part 313 includes a second upper heating plate and at least one third heat-pressing frame. The third heat-pressing frame protrudes from the bottom surface of the second upper heating plate, and each third heat-pressing frame corresponds to one battery cell. An upper cavity 33 for avoiding the battery cell is formed within the third heat-pressing frame. The second upper heating plate is configured to heat the third heat-pressing frame. The lower heat-sealing part 322 includes a second lower heating plate and at least one fourth heat-pressing frame. The fourth heat-pressing frame protrudes from the top surface of the second lower heating plate, and each fourth heat-pressing frame corresponds to one third heat-pressing frame. The fourth heat-pressing frame is adapted to the third heat-pressing frame. A lower cavity 34 for avoiding the battery cell is formed within the fourth heat-pressing frame. The second lower heating plate is configured to heat the fourth heat-pressing frame. The first heat-pressing frame is configured to heat-press the outer edge of the upper surface of the battery cell. The second heat-pressing frame is configured to heat-press the outer edge of the lower surface of the battery cell when the first heat-pressing frame heat-presses the battery cell, thereby heat-sealing the battery cell.

[0071] As can be seen, when the upper heat-sealing part 313 and the lower heat-sealing part 322 are closed, the fourth heat-sealing frame supports the outer edge of the lower surface of the battery cell, and the third heat-sealing frame presses on the outer edge of the upper surface of the battery cell, thereby pressing the outer edge of the battery cell tightly onto the fourth heat-sealing frame. The second upper heating plate and the second lower heating plate simultaneously heat the third heat-sealing frame and the fourth heat-sealing frame. The heat sealing of the outer edges of the upper and lower surfaces of the battery cell can be completed in one operation, which improves the heat sealing efficiency of the battery cell.

[0072] Please see Figure 2As shown, in one embodiment, a plurality of guide posts 42 are provided between the mounting plate 310 and the base 10. The upper end of the guide post 42 is fixedly connected to the mounting plate 310, and the lower end of the guide post 42 is fixedly connected to the base 10. A plurality of guide sleeves 43 are provided on both the upper lifting plate 312 and the lower lifting plate 321. Each guide sleeve 43 corresponds to one guide post 42. The upper lifting plate 312 and the lower lifting plate 321 are both vertically and vertically inserted through the plurality of guide sleeves 43 onto the corresponding plurality of guide posts 42.

[0073] Specifically, both the mounting plate 310 and the base 10 are square structures, and four guide posts 42 are provided, which are installed at the four corners of the mounting plate 310.

[0074] It can be seen that by setting the guide column 42 and the guide sleeve 43, the lifting and lowering of the upper lifting plate 312 and the lower lifting plate 321 are guided, thereby improving the stability of the lifting and lowering of the upper lifting plate 312 and the lower lifting plate 321.

[0075] Please see Figures 1 to 4 As shown, in one embodiment, the cell heat sealing device further includes a first limiting component and a second limiting component. The first limiting component is disposed between the base 10 and the upper lifting plate 312, and is configured to limit the downward stroke of the upper lifting plate 312. The second limiting component is disposed between the mounting plate 310 and the lower lifting plate 321, and is configured to limit the upward stroke of the lower lifting plate 321.

[0076] Specifically, the first limiting component includes a first upper limiting rod 44 and a first lower limiting rod 45. The first upper limiting rod 44 is vertically installed on the bottom surface of the upper lifting plate 312, and the first lower limiting rod 45 is vertically installed on the top surface of the base 10. The first upper limiting rod 44 and the first lower limiting rod 45 correspond to each other in the vertical direction. The second limiting component includes a second upper limiting rod 46 and a second lower limiting rod 47. The second upper limiting rod 46 is vertically installed on the bottom surface of the mounting plate 310, and the second lower limiting rod 47 is vertically installed on the top surface of the lower lifting plate 321. The second upper limiting rod 46 and the second lower limiting rod 47 correspond to each other in the vertical direction.

[0077] Specifically, the installation height of at least one of the first upper limit rod 44 and the first lower limit rod 45 is adjustable to adjust the descent stroke of the upper lifting plate 312; the installation height of at least one of the second upper limit rod 46 and the second lower limit rod 47 is adjustable to adjust the ascending stroke of the lower lifting plate 321.

[0078] As can be seen, by setting the first limiting component, the downward stroke of the upper lifting plate 312 is limited; by setting the second limiting component, the upward stroke of the lower lifting plate 321 is limited, thereby achieving precise control of the pressure during heat sealing, avoiding damage to the battery cell due to excessive pressure or affecting the heat sealing effect due to insufficient pressure.

[0079] In one embodiment, the cell heat sealing device further includes a guide support 48 extending along a first horizontal direction. The guide support 48 is disposed on the tab-facing side of the cell and is configured to guide and support the tab of the cell.

[0080] Specifically, the guide support 48 is a guide plate installed at a preset height, and the guide plate has a support surface for guiding and supporting the tabs of the battery cell.

[0081] As can be seen, by setting the guide support 48, the electrode tabs of the battery cell are guided and supported, thus avoiding bending of the electrode tabs during the heat sealing process.

[0082] The basic working principle of the cell heat sealing device proposed in this application is as follows:

[0083] S1, the conveying mechanism transports the material to the heat sealing mechanism 30;

[0084] S2, the first drive mechanism 20 drives the base 10 to move forward synchronously with the material, while the upper heat sealing part 313 and the lower heat sealing part 322 of the heat sealing mechanism 30 close together to heat seal the battery cell.

[0085] S3, after the heat sealing mechanism 30 completes the heat sealing of the batch of battery cells, the upper heat sealing part 313 and the lower heat sealing part 322 of the heat sealing mechanism 30 separate, and the first drive mechanism 20 drives the base 10 to move backward to drive the heat sealing mechanism 30 back to the initial position to perform heat sealing on the next batch of battery cells.

[0086] The cell heat sealing device proposed in this application has the following advantages:

[0087] 1) It achieves continuous material conveying and heat sealing of the battery cell by following the material, thereby improving the heat sealing efficiency of the battery cell while ensuring the heat sealing effect.

[0088] 2) It can perform heat sealing on the battery cells in stages, avoiding damage to the battery cells due to excessive temperature during the heat sealing process;

[0089] 3) It can press the upper and lower surfaces of the battery cell before heat sealing the edges, preventing the battery cell from shifting during the heat sealing process and improving the accuracy of heat sealing;

[0090] 4) It achieves precise control of pressure during heat sealing, avoiding damage to the battery cell due to excessive pressure or affecting the heat sealing effect due to insufficient pressure.

[0091] 5) It can guide and support the tabs of the battery cell during the heat sealing process, preventing the tabs from bending during the heat sealing process.

[0092] The above embodiments merely illustrate the basic principles and characteristics of this application. This application is not limited to the above examples. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A battery cell heat sealing device, characterized in that, The cell heat sealing device includes a base, a first drive mechanism, and a heat sealing mechanism, wherein: The base is reciprocally mounted on the external frame along a first horizontal direction. The heat sealing mechanism is mounted on the base and configured to heat seal the battery cells conveyed by the conveying mechanism. The conveying mechanism is configured to convey materials along the first horizontal direction. The materials include a bottom film and a plurality of battery cells, which are spaced apart on the upper surface of the bottom film along the first horizontal direction. The drive end of the first drive mechanism is connected to the base. The first drive mechanism is configured to drive the base to reciprocate along the first horizontal direction. During the heat sealing process of the heat sealing mechanism, the first drive mechanism drives the base to follow the material and convey it forward synchronously.

2. The cell heat sealing device according to claim 1, characterized in that, The heat-sealing mechanism includes an upper heat-sealing assembly and a lower heat-sealing assembly. The upper heat-sealing assembly is disposed above the lower heat-sealing assembly, and the material passes between the upper heat-sealing assembly and the lower heat-sealing assembly, wherein: The upper heat sealing assembly includes a mounting plate, a second drive mechanism, an upper lifting plate, and an upper heat sealing part. The mounting plate is fixedly installed above the base, and the upper lifting plate is movably installed below the mounting plate. The fixed end of the second drive mechanism is installed on the mounting plate, and the drive end of the second drive mechanism is connected to the upper lifting plate. The second drive mechanism is configured to drive the upper lifting plate to move up and down. The upper heat sealing part is disposed on the bottom surface of the upper lifting plate. The lower heat sealing assembly includes a third drive mechanism, a lower lifting plate, and a lower heat sealing part. The lower lifting plate is movably mounted on the base, and the lower heat sealing part is mounted on the top surface of the lower lifting plate. The fixed end of the third drive mechanism is mounted on the base, and the driving end of the third drive mechanism is connected to the lower lifting plate. The third drive mechanism is configured to drive the lower lifting plate to move up and down. The second driving mechanism drives the upper lifting plate to descend and the third driving mechanism drives the lower lifting plate to rise, so as to drive the upper heat sealing part and the lower heat sealing part to close together, and to heat seal the edge of the battery cell on the material through the cooperation of the upper heat sealing part and the lower heat sealing part.

3. The cell heat sealing device according to claim 2, characterized in that, The upper heat-sealing section includes a first upper heat-pressing unit and an upper pressing unit arranged side-by-side along the first horizontal direction, and the lower heat-sealing section includes a lower pressing unit and a first lower heat-pressing unit arranged side-by-side along the first horizontal direction, wherein: The first upper hot-pressing unit is correspondingly arranged with the lower pressing unit, and the first upper hot-pressing unit is configured to cooperate with the lower pressing unit to perform hot pressing on the outer edge of the upper surface of the battery cell; The upper pressing unit is configured to correspond to the first lower hot pressing unit, and the first lower hot pressing unit is configured to cooperate with the upper pressing unit to perform hot pressing on the outer edge of the lower surface of the battery cell.

4. The cell heat sealing device according to claim 3, characterized in that, The first upper hot pressing unit includes a first upper heating plate and at least one first hot pressing frame. The first hot pressing frame protrudes from the bottom surface of the first upper heating plate. Each first hot pressing frame corresponds to one of the battery cells. An upper cavity is formed within the first hot pressing frame to avoid the battery cells. The first upper heating plate is configured to heat the first hot pressing frame. The upper pressing unit includes an upper pad and at least one upper pressing frame. The upper pressing frame protrudes from the bottom surface of the upper pad. Each upper pressing frame corresponds to one of the battery cells. An upper cavity is formed within the upper pressing frame to avoid the battery cells. The bottom surfaces of the first hot pressing frame and the upper pressing frame are on the same horizontal plane. The first lower hot pressing unit includes a first lower heating plate and at least one second hot pressing frame. The second hot pressing frame protrudes from the top surface of the first lower heating plate. Each second hot pressing frame corresponds to one of the battery cells. A lower cavity is formed within the second hot pressing frame to avoid the battery cells. The first lower heating plate is configured to heat the second hot pressing frame. The lower pressing unit includes a lower pad and at least one lower pressing frame. The lower pressing frame protrudes from the top surface of the lower pad. Each lower pressing frame corresponds to one of the battery cells. A lower cavity is formed within the lower pressing frame to avoid the battery cells. The bottom surfaces of the second hot pressing frame and the lower pressing frame are on the same horizontal plane. The first hot-pressing frame is configured to cooperate with the lower pressing frame to perform hot pressing on the outer edge of the upper surface of the battery cell; the second hot-pressing frame is configured to cooperate with the upper pressing frame to perform hot pressing on the outer edge of the lower surface of the battery cell.

5. The cell heat sealing device according to claim 4, characterized in that, The first hot-pressing frame, the upper pressing frame, the second hot-pressing frame, and the lower pressing frame have the same structure. The heating end of the first hot-pressing frame is arranged corresponding to the four adjacent outer edges of the battery cell, or the heating end of the first hot-pressing frame is arranged corresponding to the three adjacent outer edges of the battery cell.

6. The cell heat sealing device according to claim 4, characterized in that, The upper cavity is provided with an upper elastic pressing assembly extending downward from the upper cavity, and the lower cavity is provided with a lower elastic pressing assembly extending upward from the lower cavity. The upper elastic pressing assembly is configured to press the upper surface of the battery cell before heat sealing the edge of the battery cell, and the lower elastic pressing assembly is configured to press the lower surface of the battery cell before heat sealing the edge of the battery cell.

7. The cell heat sealing device according to claim 4, characterized in that, The upper heat sealing part includes a second upper heating plate and at least one third heat pressing frame. The third heat pressing frame protrudes from the bottom surface of the second upper heating plate. Each third heat pressing frame corresponds to one battery cell. An upper cavity is formed inside the third heat pressing frame to avoid the battery cell. The second upper heating plate is configured to heat the third heat pressing frame. The lower heat-sealing part includes a second lower heating plate and at least one fourth heat-pressing frame. The fourth heat-pressing frame protrudes from the top surface of the second lower heating plate. Each fourth heat-pressing frame corresponds to a third heat-pressing frame. The fourth heat-pressing frame is adapted to the third heat-pressing frame. A lower cavity for avoiding the battery cell is formed inside the fourth heat-pressing frame. The second lower heating plate is configured to heat the fourth heat-pressing frame. The first hot-pressing frame is configured to hot-press the outer edge of the upper surface of the battery cell, and the second hot-pressing frame is configured to hot-press the outer edge of the lower surface of the battery cell while the first hot-pressing frame hot-presses the battery cell, thereby hot-sealing the battery cell.

8. The cell heat sealing device according to claim 2, characterized in that, A plurality of guide posts are provided between the mounting plate and the base. The upper end of the guide post is fixedly connected to the mounting plate, and the lower end of the guide post is fixedly connected to the base. A plurality of guide sleeves are provided on both the upper lifting plate and the lower lifting plate. Each guide sleeve corresponds to one guide post. The upper lifting plate and the lower lifting plate are both vertically and vertically mounted on the corresponding plurality of guide posts through the plurality of guide sleeves.

9. The cell heat sealing device according to claim 2, characterized in that, The cell heat sealing device further includes a first limiting component and a second limiting component, wherein: The first limiting component is disposed between the base and the upper lifting plate, and the first limiting component is configured to limit the descent stroke of the upper lifting plate; The second limiting component is disposed between the mounting plate and the lower lifting plate, and the second limiting component is configured to limit the upward stroke of the lower lifting plate.

10. The cell heat sealing device according to claim 1, characterized in that, The cell heat sealing device further includes a guide support extending along the first horizontal direction. The guide support is disposed on the tab-facing side of the cell and is configured to guide and support the tab of the cell.

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