Battery cell hot-pressing device and system for preventing deformation of tabs
By using a fixture and hot-pressing module to fix the tabs in the cell hot-pressing device, the problem of tab deformation was solved, the pass rate of cylindrical cells and battery production efficiency were improved, and the battery manufacturing cost was reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG LYRIC ROBOT INTELLIGENT AUTOMATION CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-21
AI Technical Summary
Existing cell hot-pressing mechanisms are prone to causing electrode deformation when hot-pressing cylindrical cells, leading to a decrease in the yield of cylindrical cells and an increase in battery manufacturing costs.
A cell hot pressing device for preventing electrode tab deformation is adopted, including a jig, a fixing module and a hot pressing module. The electrode tab is fixed by the pressure block of the fixing module, and the hot pressing head of the hot pressing module is used to hot press both ends of the cell body to ensure that the electrode tab is always fixed by the pressure block and avoids deformation.
This reduces the risk of electrode deformation during the hot pressing process of cylindrical cells, improves the yield rate of cylindrical cells, reduces battery manufacturing costs, and improves the efficiency and space utilization of cell hot pressing.
Smart Images
Figure CN224153370U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery manufacturing technology, and in particular to a cell hot pressing device and system for preventing electrode deformation. Background Technology
[0002] A battery is a power supply component that converts chemical energy into electrical energy. Its smallest energy conversion unit is the cell, meaning a battery is composed of one or more cells. Typically, a cylindrical cell includes a positive electrode, a negative electrode, a separator, and two tabs. The positive and negative electrodes are opposite each other, and the separator is located between the positive and negative electrodes to isolate them and prevent short circuits. The two tabs are led out from the positive and negative electrodes respectively and exposed to the outside, serving to conduct current and connect to an external circuit.
[0003] In related technologies, battery manufacturing requires the use of a cell hot-pressing mechanism to hot-press cylindrical cells. This eliminates air bubbles or gaps between the positive electrode, negative electrode, and separator, and ensures a tighter fit, thereby increasing the energy density and structural stability of the cylindrical cell. However, existing cell hot-pressing mechanisms are prone to deforming the tabs during the hot-pressing process, which reduces the yield rate of cylindrical cells and may even render them unusable, increasing battery manufacturing costs. Utility Model Content
[0004] This application provides a cell hot pressing device and system for preventing electrode deformation, aiming to solve the problem that electrode deformation is easily caused when the cell hot pressing mechanism performs hot pressing on cylindrical cells in related technologies.
[0005] To address the aforementioned drawbacks in related technologies, this application provides a cell hot-pressing device for preventing electrode deformation, used to hot-press cylindrical cells. The cylindrical cell includes a cell body, and an electrode is provided on one end face of the cell body, adjacent to the edge and extending along the axial direction of the cell body. Specifically, the cell hot-pressing device includes a jig, a fixing module with a pressure block, and two hot-pressing modules with hot-pressing heads. The two hot-pressing modules are located on opposite sides of the jig, and the fixing module is located above the jig. The jig is used to fix the cell body; the fixing module is used to drive the pressure block to move toward the electrode and make the end of the electrode away from the cell body abut against the pressure block; the two hot-pressing modules are used to drive the two hot-pressing heads to move toward the cell body and make the two hot-pressing heads press the opposite ends of the cell body.
[0006] In some implementations, the cell hot pressing device also includes a control module that is communicatively connected to the fixing module and the hot pressing module. The control module is used to control the operation of the fixing module and the hot pressing module.
[0007] In some implementation schemes, the fixing module includes, in addition to the pressure block, a first displacement component that is communicatively connected to the control module. The pressure block is disposed on the first displacement component, which is used to drive the pressure block to move in space. The hot pressing module includes, in addition to the hot pressing head, a second displacement component and a hot pressing component that are communicatively connected to the control module. The hot pressing head is located in the hot pressing component, and the hot pressing component is disposed on the second displacement component, which is used to drive the hot pressing component to move in space.
[0008] In some implementations, the hot pressing assembly also includes a heater and a temperature detector, which are respectively communicatively connected to the control module. Specifically, the heater is used to heat the hot pressing head; the temperature detector is used to detect the temperature data of the hot pressing head in real time; the control module is used to determine whether the temperature data is within a preset temperature range, and if it is not within the preset temperature range, it controls the heater to adjust the heating amount of the hot pressing head so that the temperature data is within the preset temperature range.
[0009] In some implementations, the cell hot pressing device also includes an alarm module that is communicatively connected to the control module. Specifically, the alarm module is used to send an alarm to the outside world upon startup; the control module is also used to determine whether the difference between the temperature data and the upper limit value is greater than a first preset threshold when the temperature data exceeds the upper limit value of a preset temperature range, and to control the alarm module to start when the difference is greater than the first preset threshold value; or to determine whether the difference between the lower limit value and the temperature data is greater than a second preset threshold value when the temperature data is lower than the lower limit value of a preset temperature range, and to control the alarm module to start when the difference is greater than the second preset threshold value.
[0010] In some implementations, the cell hot-pressing device further includes a third displacement component and a barcode scanning module, both communicatively connected to the control module. The third displacement component is located above the fixture, and the barcode scanning module is mounted on the third displacement component. An information code is affixed to the electrode tab, storing the cell information of the cylindrical battery cell. Specifically, the third displacement component drives the barcode scanning module to move towards the electrode tab; the barcode scanning module scans the information code and parses the cell information; the control module also determines whether the cell information matches preset cell information, and stores the cell information if they match.
[0011] In some implementations, the cell hot pressing device also includes an illumination module mounted on the barcode scanning module and communicatively connected to the control module. The illumination module is used to emit illumination light, and the direction of the illumination light emission is consistent with the orientation of the lens in the barcode scanning module.
[0012] In some implementations, the clamping block has an inclined surface for the end of the tab away from the main body of the battery cell to abut against, and the angle between the inclined surface and the axis of the main body of the battery cell is an obtuse angle.
[0013] In some implementation schemes, each hot pressing module has multiple hot pressing heads spaced apart from each other in a preset direction; the fixture is provided with multiple fixing slots spaced apart from each other in a preset direction, and each fixing slot is used to place a battery cell body.
[0014] The second aspect of this application provides a cell hot pressing system to prevent electrode deformation. The cell hot pressing system includes a material conveying device and the cell hot pressing device provided in the first aspect of this application. The material conveying device is adjacent to the cell hot pressing device. The cell hot pressing device is used to hot press the cylindrical cell. The material conveying device is used to transport the cylindrical cell to a fixture in the cell hot pressing device or to remove the cylindrical cell from the fixture.
[0015] The hot-pressing device for battery cells provided in the first aspect of this application comprises a fixture, a fixing module (with a pressure block), and two hot-pressing modules (with hot-pressing heads). The two hot-pressing modules are located on opposite sides of the fixture, and the fixing module is located above the fixture. In practical applications, the cylindrical battery cell to be hot-pressed can be fixed on the fixture, and the fixing module can be controlled to drive the pressure block to move towards the tab of the cylindrical battery cell until the end of the tab furthest from the battery cell body abuts against the pressure block to fix the tab. Then, the two hot-pressing modules can be controlled to drive the two hot-pressing heads to move towards the cylindrical battery cell, thereby using the hot-pressing heads of the two hot-pressing modules to squeeze the opposite ends of the cylindrical battery cell, thus achieving hot pressing of the cylindrical battery cell. Therefore, in this application, during the hot pressing of the cylindrical battery cell, the tab is fixed by the pressure block from beginning to end, thereby reducing the risk of tab deformation during the hot pressing process, improving the yield rate of the cylindrical battery cell, preventing the cylindrical battery cell from becoming scrap due to tab deformation, and ultimately reducing the manufacturing cost of the battery.
[0016] The cell hot pressing system provided in the second aspect of this application includes the cell hot pressing device provided in the first aspect of this application, and therefore possesses all the advantages of the cell hot pressing device. Attached Figure Description
[0017] To more clearly illustrate the related technologies or the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the related technologies or the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application, and not all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of the battery cell hot pressing device provided in the embodiments of this application;
[0019] Figure 2 Provided for the embodiments of this application Figure 1 A magnified view of a portion of point A in the middle.
[0020] The markings shown in the above figures represent:
[0021] 1-Frame, 2-Jig, 3-Fixing module, 4-Hot pressing module, 5-Control module, 6-Third displacement component, 7-Scanning module, 8-Lighting module, 31-Pressure block, 32-First displacement component, 311-Inclined surface, 41-Hot pressing component, 42-Second displacement component, 411-Hot pressing head, 412-Heater, 413-Temperature detector. Detailed Implementation
[0022] In related technologies, during battery manufacturing, a cell hot-pressing mechanism is typically used to hot-press cylindrical cells to eliminate air bubbles or gaps between the positive electrode, negative electrode, and separator, and to make them fit together more tightly, thereby improving the energy density of the cylindrical cell and enhancing its structural stability. However, existing cell hot-pressing mechanisms easily cause tab deformation during the hot-pressing of cylindrical cells, reducing the yield rate of cylindrical cells and increasing battery manufacturing costs. In view of this, this application proposes a cell hot-pressing device and system to prevent tab deformation in the embodiments below, in order to solve the above-mentioned drawbacks existing in related technologies.
[0023] To make the objectives, technical solutions, and advantages of this application more apparent and understandable, this application will be clearly and completely described below in conjunction with its embodiments and corresponding drawings. Throughout, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. It should be understood that the embodiments of this application described below are only for explaining this application and are not intended to limit this application. That is, all other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.
[0024] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the battery cell hot pressing device. Figure 2 yes Figure 1A partial enlarged view at point A. This embodiment provides a cell hot-pressing device to prevent electrode tab deformation, used for hot-pressing cylindrical cells. The cylindrical cell includes a cylindrical cell body, which consists of a positive electrode, a negative electrode, and a diaphragm located between the positive and negative electrodes. An electrode tab is provided on one end face of the cell body, adjacent to the edge and extending axially along the cell body. The end of the electrode tab adjacent to the cell body is inserted into the cell body and electrically connected to the positive electrode and / or the negative electrode. Specifically, the cell hot-pressing device includes a frame 1, a fixture 2, a fixing module 3 with a pressure block 31, and two hot-pressing modules 4 with hot-pressing heads 411. The fixture 2, fixing module 3, and hot-pressing modules 4 are all mounted on the frame 1. The two hot-pressing modules 4 are located on opposite sides of the fixture 2, and the fixing module 3 is located above the fixture 2. In this embodiment, the jig 2 is used to fix the battery cell body; the fixing module 3 is used to drive the pressure block 31 to move toward the tab and make the end of the tab away from the battery cell body abut against the pressure block 31; the two hot pressing modules 4 are used to drive the two hot pressing heads 411 to move toward the battery cell body respectively and make the two hot pressing heads 411 press the opposite ends of the battery cell body respectively.
[0025] Furthermore, in addition to the pressure block 31, the fixing module 3 also includes a first displacement component 32. The pressure block 31 is disposed on the first displacement component 32, and the first displacement component 32 can drive the pressure block 31 to move in space, so that the end of the electrode away from the main body of the battery cell abuts against the pressure block 31, thereby fixing the electrode. In addition to the hot pressing head 411, the hot pressing module 4 also includes a second displacement component 42 and a hot pressing component 41. The hot pressing head 411 is located in the hot pressing component 41 (i.e., the hot pressing head 411 is a component of the hot pressing component 41), and the hot pressing component 41 is disposed on the second displacement component 42. The second displacement component 42 can drive the hot pressing component 41 (equivalent to driving the hot pressing head 411) to move in space, so that the two hot pressing heads 411 of the two hot pressing components 41 respectively press the opposite ends of the main body of the battery cell, thereby achieving hot pressing of the cylindrical battery cell.
[0026] In other words, the hot pressing process of the cylindrical battery cell is as follows: First, the cylindrical battery cell is fixed on the fixture 2, and the first displacement component 32 is controlled to drive the pressure block 31 to move towards the tab of the cylindrical battery cell until the end of the tab away from the battery cell body abuts against the pressure block 31 to fix the tab. Then, the two second displacement components 42 are controlled to drive the two hot pressing components 41 to move towards the cylindrical battery cell, so that the hot pressing heads 411 of the two hot pressing components 41 respectively press the opposite ends of the cylindrical battery cell, thereby realizing the hot pressing of the cylindrical battery cell. Preferably, the pressure block 31 in this embodiment is a wedge-shaped block, that is, the pressure block 31 has an inclined surface 311 for the end of the tab away from the main body of the cell to abut. The angle between the inclined surface 311 and the axis of the main body of the cell is an obtuse angle, which means that the inclined surface 311 is not inclined towards the tab, but inclined away from the tab. This can prevent the tab of the cylindrical cell from shifting downward, and can also provide guidance for the hot pressing head 411 in the hot pressing assembly 41 to squeeze the end of the main body of the cell, thereby optimizing the fixing effect of the tab.
[0027] In this embodiment, the battery cell hot pressing device is an automated hot pressing device. It also includes a control module 5 that is communicatively connected to the fixed module 3 and the hot pressing module 4. Specifically, the second displacement component 42, the first displacement component 32, and the two hot pressing components 41 are communicatively connected to the control module 5. The control module 5 controls the operation of the fixed module 3 and the hot pressing module 4, that is, it controls the operation of the second displacement component 42, the first displacement component 32, and the two hot pressing components 41. However, this is not the only option; the operation of the third displacement component 6, the barcode scanning module 7, the lighting module 8, etc., mentioned below, is also controlled by the control module 5. Furthermore, it should be noted that the control module 5 can be located anywhere, as long as it can control the operation of the fixed module 3, the hot pressing module 4, etc., such as on the rack 1 or on the ground adjacent to the rack 1. The specific location can be chosen according to actual needs, and this embodiment does not impose a unique limitation. It should also be noted that the control module 5 can be any device commonly used in the field that has control and data processing and analysis functions, such as a small computer, a microcontroller, an industrial control computer (IPC), a programmable logic controller (PLC), and a distributed control system (DCS). The specific choice can be made according to actual needs, and this embodiment does not limit it to a single one.
[0028] In this embodiment, taking the second displacement component 42 as an example, it can drive the corresponding hot pressing component 41 to move in at least one of the x-axis, y-axis, and z-axis directions, and can even drive the corresponding hot pressing component 41 to rotate around at least one of the x-axis, y-axis, and z-axis coordinate axes. The specific design can be tailored to actual needs, and this embodiment does not impose a unique limitation on this; of course, the other displacement components described in this application are also like this. It should be noted that each displacement component in this application mainly includes two parts: a power part and a transmission part. The power part includes, for example, an electric motor, a cylinder, or a hydraulic cylinder, while the transmission part includes, for example, a slide rail slider, a slide groove slider, a gear rack, a worm gear, or a lead screw nut. These are relatively mature technologies in the field, so this embodiment will not describe them in detail.
[0029] In this embodiment, the fixture 2 can fix one or more cylindrical battery cells, and the hot pressing assembly 41 can have one or more hot pressing heads 411. When the hot pressing assembly 41 has multiple hot pressing heads 411 and multiple cylindrical battery cells are fixed on the fixture 2, there is a one-to-one correspondence between the multiple hot pressing heads 411 in the hot pressing assembly 41 and the multiple cylindrical battery cells fixed on the fixture 2. It can be understood that the more cylindrical battery cells that can be fixed on the fixture 2 (i.e., the more hot pressing heads 411 in the hot pressing assembly 41), the more cylindrical battery cells can be hot-pressed simultaneously, thus realizing batch hot pressing of cylindrical battery cells and improving the battery production efficiency. Based on this, in this embodiment, each hot pressing module 4 has multiple hot pressing heads 411 spaced apart from each other in a preset direction (such as the x-axis direction), and the fixture 2 is provided with multiple fixing slots (not shown) spaced apart from each other in a preset direction. Each fixing slot is used to place a battery cell body.
[0030] As can be seen from the above, in this embodiment, the tabs are fixed by the pressure block 31 throughout the hot pressing process of the cylindrical battery cell, thereby reducing the risk of tab deformation during the hot pressing process, improving the yield rate of the cylindrical battery cell, and preventing the cylindrical battery cell from becoming scrap due to tab deformation, ultimately reducing the manufacturing cost of the battery. Furthermore, the battery cell hot pressing device in this embodiment has a compact structure, high space utilization, and simultaneously hot presses both ends of the battery cell body, resulting in higher hot pressing efficiency.
[0031] In some embodiments, please refer to Figure 1 and Figure 2In addition to the hot pressing head 411, the hot pressing assembly 41 also has a heater 412 and a temperature detector 413, which are respectively communicatively connected to the control module 5. Specifically, the heater 412 is used to heat the hot pressing head 411; the temperature detector 413 is used to detect the temperature data of the hot pressing head 411 in real time; the control module 5 is used to determine whether the temperature data is within the preset temperature range, and when the temperature data is not within the preset temperature range, it controls the heater 412 to adjust the heating amount of the hot pressing head 411, so that the temperature data is within the preset temperature range. It is understandable that when the cylindrical battery cell is hot-pressed by the hot-pressing assembly 41, the hot-pressing head 411 of the hot-pressing assembly 41 needs to be heated, which is achieved by the heater 412 inside the hot-pressing assembly 41. During the hot-pressing process, the temperature of the hot-pressing head 411 needs to meet certain requirements, that is, the temperature of the hot-pressing head 411 should be within the preset temperature range. If the temperature of the hot-pressing head 411 is not within the preset temperature range, the hot-pressing effect will be reduced, and it may even lead to hot-pressing failure. Therefore, this application sets a temperature detector 413 in the hot-pressing assembly 41 so as to detect the temperature data of the hot-pressing head 411 in real time and transmit it to the control module 5. When the temperature data is not within the preset temperature range, the control module 5 can control the heater 412 to adjust the heating amount of the hot-pressing head 411, so as to achieve the purpose of the temperature data always being within the preset temperature range, thereby ensuring the hot-pressing effect of the cylindrical battery cell.
[0032] It should be noted that the heater 412 of this application can be any device with heating function commonly used in the art, such as heating tubes, electric heating films, ceramic heating elements, semiconductor heating devices, infrared heating devices, and electromagnetic induction heating devices, etc. The specific choice can be made according to actual needs, and this application does not impose a unique limitation on it. It should also be noted that the temperature detector 413 of this application can be any device with temperature detection function commonly used in the art, such as wireless temperature sensors, infrared temperature sensors, fiber optic temperature sensors, temperature sensing heads (thermocouples, resistance temperature detectors), integrated temperature chips (MAX6675), etc. The specific choice can be made according to actual needs, and this application does not impose a unique limitation on it.
[0033] As at least one embodiment, the cell hot pressing device, in addition to the structure described above, also includes an alarm module mounted on the frame 1 and communicatively connected to the control module 5. Specifically, the alarm module is used to send an alarm to the outside world upon startup. The alarm method can be any method commonly used in the art, such as sound, light, or a combination of both. Simultaneously, the control module 5 can also send alarm information to terminals such as mobile phones, tablets, and smart wearable devices held by staff to remind them. The specific design can be tailored to actual needs, and this application does not impose a unique limitation. The control module 5 is also used to determine whether the difference between the temperature data and the upper limit value is greater than a first preset threshold when the temperature data exceeds the upper limit of a preset temperature range, and to control the alarm module to start when it is greater than the first preset threshold; or to determine whether the difference between the lower limit value and the temperature data is greater than a second preset threshold when the temperature data is lower than the lower limit value of a preset temperature range, and to control the alarm module to start when it is greater than the second preset threshold.
[0034] Understandably, during the hot pressing process of cylindrical battery cells, if the temperature data of the hot pressing head 411 is not within the preset temperature range and is far from the preset temperature range, it indicates that the hot pressing assembly 41 has malfunctioned. Since the hot pressing assembly 41 is easily damaged when operating in an abnormal state, this application will use an alarm module to alert the staff when the hot pressing assembly 41 malfunctions. Specifically, if the control module 5 determines that the temperature data exceeds the upper limit of the preset temperature range and the difference between the temperature data and the upper limit is large (i.e., greater than the first preset threshold), it means that the temperature of the hot pressing head 411 is too high. At this time, the control module 5 will control the alarm module to sound an alarm to alert the staff. If the control module 5 determines that the temperature data is below the lower limit of the preset temperature range and the difference between the lower limit and the temperature data is large (i.e., greater than the second preset threshold), it means that the temperature of the hot pressing head 411 is too low. At this time, the control module 5 will also control the alarm module to sound an alarm to alert the staff.
[0035] In some embodiments, the tabs of the cylindrical battery cell are provided with information codes that store cell information such as model, specifications, production batch, production date, and production equipment number. Based on this, please refer to... Figure 1 and Figure 2In addition to the structure described above, the battery cell hot pressing device also includes a third displacement component 6 and a barcode scanning module 7, which are communicatively connected to the control module 5. The third displacement component 6 is mounted on the frame 1 and located above the fixture 2, and the barcode scanning module 7 is mounted on the third displacement component 6. Specifically, the third displacement component 6 drives the barcode scanning module 7 to move toward the electrode tab; the barcode scanning module 7 scans the information code on the electrode tab and parses the corresponding battery cell information; the control module 5 also determines whether the battery cell information parsed by the barcode scanning module 7 is the same as the preset battery cell information, and stores the battery cell information if they are the same. It should be noted that when the battery cell information parsed by the barcode scanning module 7 is different from the preset battery cell information, it indicates that the cylindrical battery cell currently fixed on the fixture 2 is not the cylindrical battery cell that needs to be hot-pressed, that is, the cylindrical battery cell has been misused or mixed. It should also be noted that the information code on the tab can be any information code commonly used in the field that has information storage function and can be scanned, such as QR code, barcode, PDF417 code, Data Matrix code, MaxiCode code, Aztec code, Hanxin code, etc. The specific code can be selected according to actual needs, and this application does not impose a unique limitation on it. Preferably, before the scanning module 7 scans the information code on the tab, the tab is fixed by the pressure block 31, so as to ensure the stability of the tab during the scanning process.
[0036] Understandably, the information code on the tab contains a lot of important information about the cylindrical cell. After scanning the code, this information is recorded and linked to other data in the battery manufacturing process. If a quality problem occurs later or performance traceability is required, the production source and parameters of the relevant cylindrical cell can be quickly and accurately retrieved. This helps in analyzing the cause of the problem and taking corresponding improvement measures, and also facilitates battery recall management. Scanning the information code can confirm the identity and relevant information of the cylindrical cell, ensuring that the correct cylindrical cell is used in the hot pressing process. This avoids situations such as misuse or mixing of cylindrical cells due to human error or other reasons, ensuring the accuracy of the production process and the consistency of product quality. In addition, the scanning of the information code can also be linked with the control module 5. The control module 5 can automatically adjust the hot pressing parameters (such as hot pressing time, temperature of the hot pressing head 411, etc.) based on the information obtained from the scan, ensuring that cylindrical cells of different models or specifications receive appropriate hot pressing treatment.
[0037] As at least one embodiment, the cell hot-pressing device, in addition to the structure described above, also includes an illumination module 8 disposed on the scanning module 7 and communicatively connected to the control module 5. The illumination module 8 is used to emit illumination light, and the emission direction of the illumination light needs to be consistent with the orientation of the lens in the scanning module 7. This ensures that when the third displacement component 6 moves the scanning module 7 to the scanning position, the illumination light emitted by the illumination module 8 can completely and accurately illuminate the information code on the tab. It is understood that the color and material of the tab itself may result in a low reflectivity of its surface to light or a low contrast with the surrounding environment, making it difficult for the scanning module 7 to accurately identify the information code on it. Therefore, this application provides an illumination module 8 on the scanning module 7. The illumination module 8 can provide sufficient and uniform light, which can increase the contrast between the tab and the background, making it easier for the scanning module 7 to capture the pattern and details of the information code, thereby improving the success rate and accuracy of scanning. It should be noted that the lighting module 8 can use any light source commonly used in the field, such as LED light source, halogen light source, laser light source, etc. The specific choice can be made according to actual needs, and this application does not make a unique limitation in this regard.
[0038] In addition to the cell hot-pressing device described above, this embodiment provides a cell hot-pressing system to prevent electrode deformation, including a material conveying device and the cell hot-pressing device described above. The material conveying device is adjacent to the cell hot-pressing device. The cell hot-pressing device is used to hot-press cylindrical cells, and the material conveying device is used to transport the cylindrical cells to the fixture 2 in the cell hot-pressing device or to remove the cylindrical cells from the fixture 2. In this embodiment, the material conveying device mainly undertakes the function of loading and unloading. The material conveying device first transports the cylindrical cells to the fixture 2 in the cell hot-pressing device for fixing, so that the cell hot-pressing device can hot-press the cylindrical cells on the fixture 2. After the cylindrical cells on the fixture 2 are hot-pressed, the material conveying device removes the hot-pressed cylindrical cells from the fixture 2 and transports them to a designated location.
[0039] In some embodiments, the cell hot pressing system, in addition to the structure described above, also includes a loading tray (for storing unpressed cylindrical cells) and a unloading tray (for storing pressed cylindrical cells). The loading tray and unloading tray can be located in any position, such as on the frame 1, the machine platform mentioned below, or the ground adjacent to the frame 1 / machine platform. The specific location can be selected according to actual needs, and this application does not impose a unique limitation. The material conveying device includes a machine platform, a fourth displacement component, and a clamping module. The machine platform is adjacent to the frame 1 in the cell hot pressing device. The fourth displacement component is located on the machine platform, and the clamping module is located on the fourth displacement component. Specifically, the clamping module is used to clamp the cylindrical cells; the fourth displacement component is used to drive the clamping module to move towards or away from the fixture 2. In other words, in practical applications, the fourth displacement component first drives the clamping module to move to the loading tray to clamp the cylindrical battery cells in the loading tray. Then, the fourth displacement component drives the clamping module to move to the fixture 2 in the battery cell hot pressing device and releases the cylindrical battery cells to place them on the fixture 2. After the battery cell hot pressing device completes the hot pressing of the cylindrical battery cells on the fixture 2, the clamping module clamps the cylindrical battery cells on the fixture 2 and transports them to the unloading tray for storage via the fourth displacement component. This cycle is repeated until all the cylindrical battery cells have been hot-pressed. Preferably, the clamping module includes a robotic arm, which is used to clamp both the loading and unloading of the cylindrical battery cells; or, the clamping module includes two robotic arms, one for clamping the loading and the other for unloading the cylindrical battery cells.
[0040] The above embodiments are merely preferred implementations of this application and are not the only limitations on the battery cell hot pressing device and system. Those skilled in the art can flexibly customize these embodiments based on actual application scenarios. It is understood that the above embodiments of this application utilize a fixture 2, a fixing module 3 (with a pressure block 31), and two hot pressing modules 4 (with hot pressing heads 411). The two hot pressing modules 4 are located on opposite sides of the fixture 2, and the fixing module 3 is located above the fixture 2. In practical applications, the cylindrical battery cell to be hot-pressed can be fixed on the fixture 2, and the fixing module 3 can be controlled to drive the pressure block 31 to move towards the tab of the cylindrical battery cell until the end of the tab furthest from the battery cell body abuts against the pressure block 31 to fix the tab. Then, the two hot pressing modules 4 can be controlled to drive the two hot pressing heads 411 to move towards the cylindrical battery cell, thereby using the hot pressing heads 411 of the two hot pressing modules 4 to press the opposite ends of the cylindrical battery cell, thus achieving hot pressing of the cylindrical battery cell. Therefore, it can be seen that in this application, when the cylindrical battery cell is hot-pressed, the tab is fixed by the pressure block 31 from beginning to end, thereby reducing the risk of tab deformation during the hot-pressing process of the cylindrical battery cell, improving the pass rate of the cylindrical battery cell, effectively preventing the cylindrical battery cell from becoming scrap due to tab deformation, and ultimately reducing the manufacturing cost of the battery.
[0041] It should be noted that the several embodiments shown above in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in the textual description of this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply such an actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements may include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus; and, without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0042] Furthermore, those skilled in the art can implement or use this application by practicing the several embodiments shown above. Various modifications to the embodiments shown above will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments not shown without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the several embodiments shown above, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A tab deformation preventing cell heat press device for heat pressing a cylindrical cell, the cylindrical cell including a cell main body, a tab provided on an end surface of one end of the cell main body, the tab being adjacent to an edge and extending in an axial direction of the cell main body, characterized by, The fixture includes a jig, a fixing module with a pressure block, and two hot pressing modules with hot pressing heads. The two hot pressing modules are located on opposite sides of the jig, and the fixing module is located above the jig. The fixture is used to fix the battery cell body; The fixing module is used to drive the pressure block to move toward the electrode tab, and to make the end of the electrode tab away from the cell body abut against the pressure block; The two hot pressing modules are used to drive the two hot pressing heads to move toward the battery cell body, and to make the two hot pressing heads press the opposite ends of the battery cell body respectively.
2. The cell hot press apparatus of claim 1, wherein, It also includes a control module that is communicatively connected to the fixing module and the hot pressing module, the control module being used to control the operation of the fixing module and the hot pressing module.
3. The cell hot press apparatus of claim 2, wherein, The fixing module further includes a first displacement component that is communicatively connected to the control module. The pressure block is disposed on the first displacement component, and the first displacement component is used to drive the pressure block to move in space. The hot pressing module further includes a second displacement component and a hot pressing component that are communicatively connected to the control module. The hot pressing head is located in the hot pressing component, and the hot pressing component is disposed on the second displacement component. The second displacement component is used to drive the hot pressing component to move in space.
4. The cell hot press apparatus of claim 3, wherein, The hot-pressing assembly further includes a heater and a temperature detector, which are respectively communicatively connected to the control module, wherein: The heater is used to heat the hot press head; The temperature detector is used to detect the temperature data of the hot press head in real time; The control module is used to determine whether the temperature data is within a preset temperature range, and when it is not within the preset temperature range, to control the heater to adjust the heating amount of the hot press head so that the temperature data is within the preset temperature range.
5. The cell hot press apparatus of claim 4, wherein, It also includes an alarm module that is communicatively connected to the control module, wherein: The alarm module is used to send an alarm to the outside world when it is started. The control module is further configured to: when the temperature data exceeds the upper limit of the preset temperature range, determine whether the difference between the temperature data and the upper limit is greater than a first preset threshold, and control the alarm module to start when it is greater than the first preset threshold; when the temperature data is lower than the lower limit of the preset temperature range, determine whether the difference between the lower limit and the temperature data is greater than a second preset threshold, and control the alarm module to start when it is greater than the second preset threshold.
6. The cell heat press apparatus of claim 2, wherein, It also includes a third displacement component and a barcode scanning module, which are respectively communicatively connected to the control module. The third displacement component is located above the fixture, and the barcode scanning module is disposed on the third displacement component. An information code is provided on the electrode tab, and the information code stores the cell information of the cylindrical battery cell, wherein: The third displacement component is used to drive the scanning module to move toward the tab; The scanning module is used to scan the information code and parse out the battery cell information; The control module is also used to determine whether the cell information is the same as the preset cell information, and to store the cell information if they are the same.
7. The cell heat press apparatus of claim 6, wherein, It also includes an illumination module disposed on the scanning module and communicatively connected to the control module. The illumination module is used to emit illumination light, and the emission direction of the illumination light is consistent with the orientation of the lens in the scanning module.
8. The cell hot pressing device according to claim 1, characterized in that, The pressure block has an inclined surface for the end of the electrode away from the cell body to abut against, and the angle between the inclined surface and the axis of the cell body is an obtuse angle.
9. The cell heat press apparatus of claim 1, wherein, Each of the hot pressing modules has a plurality of hot pressing heads spaced apart from each other in a preset direction; The fixture is provided with a plurality of fixing slots spaced apart from each other in the preset direction, and each fixing slot is used to place one of the battery cell bodies.
10. A cell hot-press system for preventing tab deformation, the system comprising: The device includes an adjacent conveying device and a cell hot pressing device as described in any one of claims 1 to 9, wherein the cell hot pressing device is used to hot press a cylindrical cell, and the conveying device is used to transport the cylindrical cell to a fixture in the cell hot pressing device or to remove the cylindrical cell from the fixture.