Battery cell hot pressing device and hot press
By using a floating plate and elastic element heating and cooling module in the cell hot pressing device, the problem of adhesion between the core and the hot pressing plate after hot pressing is solved, ensuring core safety and improving production efficiency.
Patent Information
- Application Number
- CN202520059811.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-10
AI Technical Summary
In the manufacturing process of square aluminum-cased lithium batteries, the problem of the core sticking to the hot pressing plate after hot pressing prevents the robotic arm from unloading the material, resulting in core damage and reduced battery safety performance.
The device employs a cell hot pressing mechanism that includes a heating plate and a floating plate. The floating plate is supported by elastic elements and equipped with heating and cooling modules to achieve rapid heating and cooling, thus preventing the core from sticking together under high temperature and high pressure.
This effectively prevents the core from sticking to the hot press plate, improves the safety performance and production efficiency of the core, reduces equipment failure rate, and increases product yield.
Smart Images
Figure CN223785148U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of batteries, in particular to a battery cell hot pressing device and a hot press. BACKGROUND
[0002] In the manufacturing process of square aluminum shell lithium batteries, in order to improve the volume energy density of the battery, the winding core needs to be hot pressed after winding is completed. The winding core is shaped to ensure that the winding core shape is fixed, and the thickness of the winding core is reduced to facilitate shell insertion.
[0003] In the related art, a hot press adopts upper and lower hot pressing plates to hot press the winding core. Since the sealing property of the winding core and the hot pressing plate is good, under the high-temperature and high-pressure environment of hot pressing, a negative pressure difference is formed between the winding core surface and the hot pressing plate, so that the two are bonded together. After hot pressing is completed, the winding core unloading manipulator cannot unload the winding core, which causes the equipment to alarm and malfunction. At the same time, the winding core is bonded to the hot pressing plate, and the winding core unloading manipulator pulls the winding core, which causes the winding core to be damaged, the separator and the pole piece of the winding core are damaged, and in the later charging and discharging process, the battery has the risks of short circuit, self-discharge and the like, which reduces the quality of the winding core and affects the safety performance of the battery.
[0004] Therefore, it is necessary to provide a battery cell hot pressing device and a hot press, which break the micro-negative pressure formed by the winding core and the hot pressing plate during hot pressing, and ensure that the winding core and the hot pressing plate are not bonded after hot pressing is completed. SUMMARY
[0005] Embodiments of the application provide a battery cell hot pressing device and a hot press to solve the problem of winding core bonding to the hot pressing plate surface in the related art.
[0006] In a first aspect, embodiments of the application provide a battery cell hot pressing device, comprising:
[0007] a plate unit comprising a heating plate and a floating plate, the heating plate being provided with an elastic element for floatingly supporting the floating plate;
[0008] a temperature adjusting unit comprising a heating module arranged on the floating plate and used for heating the floating plate, and a refrigeration module arranged on the floating plate and used for cooling the floating plate.
[0009] In the first aspect, in some embodiments, the floating plate and the heating plate are parallel to each other, a guide block is fixedly connected to one side of the floating plate close to the heating plate, and one end of the guide block away from the floating plate extends to the inside of the heating plate and is vertically and slidingly connected with the heating plate.
[0010] In some embodiments of the first aspect, the heating plate is provided with a cavity and a limiting shell in the cavity, the guide block extends to the limiting shell from one end of the floating plate and is in sliding connection with the limiting shell, and the guide block is provided with a stopper to prevent the guide block from being separated from the limiting shell.
[0011] In some embodiments of the first aspect, the elastic element is installed in the limiting shell, and the upper end of the elastic element is fixedly connected to the bottom of the guide block.
[0012] In some embodiments of the first aspect, the guide block is provided with a cavity with an opening facing the bottom surface of the floating plate, and the temperature adjusting unit is arranged on the bottom surface of the floating plate and in the cavity.
[0013] In some embodiments of the first aspect, the heating module is any one of a heating resistor, a heating sheet and an electric heating wire.
[0014] In some embodiments of the first aspect, the refrigeration module is any one of a thermoelectric refrigerator, a refrigeration heat exchanger and a semiconductor refrigeration sheet.
[0015] In some embodiments of the first aspect, the material of the floating plate is any one or more of alumina ceramic, zirconia ceramic and silicon nitride ceramic.
[0016] In some embodiments of the first aspect, the device further comprises a pressing plate above the floating plate and a driving member for driving the pressing plate to move close to or away from the floating plate.
[0017] The second aspect provides a hot press, comprising:
[0018] The hot press device for the battery cell.
[0019] The technical scheme provided by the present application has the following beneficial effects:
[0020] The device for hot pressing battery cells and the hot press provided by the embodiments of the present application have the following beneficial effects: the plate unit comprises a heating plate and a floating plate, the heating plate is provided with an elastic element for floatingly supporting the floating plate, the temperature adjusting unit comprises a heating module arranged on the floating plate and used for heating the floating plate, and a refrigeration module arranged on the floating plate and used for cooling the floating plate.
[0021] Therefore, the elastic element deforms after the floating plate is pressed, the floating plate can contact the heating plate, the heating module can directly heat the floating plate, the floating plate is heated in cooperation with the heating plate, the floating plate can quickly reach the required temperature of hot-pressing the core, and the core is successfully hot-pressed and shaped; in addition, after the hot-pressing is completed, the elastic element resets to separate the floating plate from the heating plate, the floating plate is quickly cooled by the refrigeration module, the core surface is prevented from being adhered to the floating plate due to a negative pressure difference caused by high temperature and high pressure, and therefore the problem that the core is adhered to the surface of the hot-pressing plate after hot-pressing is effectively solved. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.
[0023] Figure 1 FIG. 1 is a structural schematic diagram of a hot-pressing device according to an embodiment of the present application;
[0024] Figure 2 FIG. 2 is a connection schematic diagram of a guide block and a limiting shell according to an embodiment of the present application;
[0025] Figure 3 FIG. 3 is a structural schematic diagram of a hot-pressing device from another perspective according to an embodiment of the present application.
[0026] In the drawings, the components represented by the numbers are listed as follows:
[0027] 1, heating plate; 2, floating plate; 3, elastic element; 4, heating module; 5, refrigeration module; 6, guide block; 7, limiting shell; 8, stop block. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.
[0029] The embodiments of the present application provide an electric core hot-pressing device and a hot-pressing machine to solve the problem that the core is adhered to the surface of the hot-pressing plate after hot-pressing in the related art.
[0030] Referring to Figures 1 to 3 The first aspect of the embodiments of the present application provides an electric core hot-pressing device, which comprises:
[0031] a plate unit comprising a heating plate 1 and a floating plate 2, the heating plate 1 is provided with elastic elements 3 for floatingly supporting the floating plate 2;
[0032] a temperature adjusting unit comprising a heating module 4 arranged on the floating plate 2 and used for heating the floating plate 2, and a refrigeration module 5 arranged on the floating plate 2 and used for cooling the floating plate 2.
[0033] The heat pressing device of the embodiment of the application is provided with the heating plate 1 and the floating plate 2. Since the elastic elements 3 for floatingly supporting the floating plate 2 are mounted on the heating plate 1, the position of the floating plate 2 is higher than that of the heating plate 1 and the floating plate 2 can be kept spaced from the heating plate 1 in the pressure-free state. When the winding core is placed on the floating plate 2 for heat pressing, the floating plate 2 is pressed to extrude the elastic elements 3, so that the bottom surface of the floating plate 2 can be attached to the top surface of the heating plate 1, and the heat generated by the heating plate 1 can be transmitted to the floating plate 2 to meet the temperature required by the winding core for heat pressing.
[0034] Further, the heating module 4 and the refrigeration module 5 are arranged on the floating plate 2. The heating module 4 can directly heat the floating plate 2, and the heating plate 1 contacts and heats the floating plate 2, so that the floating plate 2 can quickly reach the temperature required for heat pressing the winding core. The refrigeration module 5 can quickly cool the floating plate 2. Specifically, after the winding core on the floating plate 2 is heat pressed, the elastic elements 3 drive the floating plate 2 to reset upward and separate from the heating plate 1, so that the heating module 4 stops working and the heat supply to the floating plate 2 is blocked.
[0035] Then, the refrigeration module 5 is used to lower the floating plate 2 to the set temperature, so that the unloading mechanical hand can conveniently clamp the winding core from the floating plate 2 and place it in the unloading tray. That is, the device of the application can ensure that the floating plate 2 in contact with the surface of the winding core after heat pressing can be quickly cooled, and the winding core will not be adhered to the floating plate 2 due to the negative pressure difference formed on the surface of the winding core caused by high temperature and high pressure, thereby effectively solving the problem of the winding core adhered to the surface of the heat pressing plate after heat pressing.
[0036] For example, the elastic elements 3 in the embodiment can be springs arranged in the heating plate 1. One end of the elastic elements 3 extends out of the heating plate 1 and is connected to the floating plate 2. The spring is contracted into the heating plate 1 under pressure, which does not affect the contact between the bottom surface of the floating plate 2 and the top surface of the heating plate 1. In some other embodiments, the elastic elements 3 can be elastic rods. The elastic rods are fixedly connected to the side walls of the floating plate 2 and the heating plate 1 at two ends, respectively. When the floating plate 2 is pressed, the elastic rods are bent to deform to enable the bottom surface of the floating plate 2 to contact the top surface of the heating plate 1.
[0037] In the first aspect, in some optional embodiments, referring to Figures 1 to 3As shown, the application provides an electric core hot pressing device, the floating plate 2 and the heating plate 1 of the electric core hot pressing device are parallel to each other, the side close to the heating plate 1 of the floating plate 2 is fixedly connected with a guide block 6, and the end away from the floating plate 2 of the guide block 6 extends to the inside of the heating plate 1 and is vertically and slidingly connected with the heating plate 1.
[0038] The floating plate 2 and the heating plate 1 of the application are parallel to each other, and the length and width dimensions of the floating plate 2 and the heating plate 1 are the same, which facilitates the heat transfer after the top surface of the heating plate 1 contacts the bottom surface of the floating plate 2. Further, the guide block 6 is fixedly installed on the floating plate 2, the guide block 6 extends to the inside of the heating plate 1 and is vertically and slidingly connected with the heating plate 1, which plays a role of guiding and limiting the floating plate 2, and ensures that the floating plate 2 can vertically move downward and be attached to the top surface of the heating plate 1. It should be noted that the heating plate 1 of the present embodiment has a certain thickness, and the guide block 6 can be slid to the inside of the heating plate 1, so that the top surface of the heating plate 1 can contact the bottom surface of the floating plate 2.
[0039] In some optional embodiments of the first aspect, referring to Figures 1 to 3 As shown, the application provides an electric core hot pressing device, the heating plate 1 of the electric core hot pressing device is provided with a cavity (not shown in the figure) and a limiting shell 7 located in the cavity, the end away from the floating plate 2 of the guide block 6 extends to the inside of the limiting shell 7 and is slidingly connected with the limiting shell 7, and the guide block 6 is provided with a stop block 8 for preventing the guide block 6 from separating from the limiting shell 7.
[0040] The heating plate 1 of the application has a cavity, the limiting shell 7 is fixedly installed in the cavity, the guide block 6 is slidingly connected with the limiting shell 7, and the guide block 6 is fixedly connected with the stop block 8, which can prevent the guide block 6 from separating from the limiting shell 7, limit the activity range of the guide block 6, and further limit the activity range of the floating plate 2.
[0041] In some optional embodiments of the first aspect, referring to Figures 1 to 3 As shown, the application provides an electric core hot pressing device, the elastic element 3 of the electric core hot pressing device is installed in the limiting shell 7, and the upper end of the elastic element 3 is fixedly connected with the bottom of the guide block 6.
[0042] The elastic element 3 of the application is installed in the limiting shell 7 and directly elastically supports the guide block 6, and after the elastic element 3 is deformed under pressure, it does not affect the contact between the bottom surface of the floating plate 2 and the top surface of the heating plate 1. In the present embodiment, the elastic element 3 is a spring, in order to ensure the stability of the floating plate 2, a plurality of limiting shells 7 and a plurality of guide blocks 6 matched with the plurality of limiting shells 7 are provided, the plurality of limiting shells 7 are arrayed and each internally installed with a spring for elastically supporting the guide block 6.
[0043] In some optional embodiments of the first aspect, referring to Figures 1 to 3As shown, the application provides an electric core hot pressing device, the guiding block 6 is provided with a cavity (not shown in the figure) with an opening facing the bottom surface of the floating plate 2, and the temperature adjusting unit is arranged on the bottom surface of the floating plate 2 and located in the cavity.
[0044] The cavity with an opening facing the bottom surface of the floating plate 2 is arranged in the guiding block 6, and the temperature adjusting unit is arranged on the bottom surface of the floating plate 2 and located in the cavity, which ingeniously utilizes the space in the guiding block 6 to arrange the temperature adjusting unit, does not affect the contact and heat transfer between the top surface of the heating plate 1 and the bottom surface of the floating plate 2, and effectively protects the temperature adjusting unit from being extruded and collided.
[0045] In the first aspect, in some optional embodiments, referring to Figures 1 to 3 As shown, the application provides an electric core hot pressing device, the heating module 4 of the electric core hot pressing device is any one of a heating resistor, a heating sheet and an electric heating wire.
[0046] The heating module 4 of the application is any one of a heating resistor, a heating sheet and an electric heating wire, which can all generate heat and quickly heat the floating plate 2 through the contact installation mode. For example, the heating resistor can adopt a metal heating body, a ceramic heating body or a PTC heating body.
[0047] In the first aspect, in some optional embodiments, referring to Figures 1 to 3 As shown, the application provides an electric core hot pressing device, the refrigeration module 5 of the electric core hot pressing device is any one of a thermoelectric refrigerator, a refrigeration heat exchanger and a semiconductor refrigeration sheet.
[0048] The refrigeration module 5 of the application is any one of a thermoelectric refrigerator, a refrigeration heat exchanger and a semiconductor refrigeration sheet, which can all absorb heat and quickly cool the floating plate 2 through the contact installation mode. For example, the thermoelectric refrigerator can adopt a semiconductor refrigerator, and the refrigeration heat exchanger can adopt a small-sized plate heat exchanger.
[0049] In the first aspect, in some optional embodiments, referring to Figures 1 to 3 As shown, the application provides an electric core hot pressing device, the material of the floating plate 2 of the electric core hot pressing device is any one or more of alumina ceramic, zirconia ceramic and silicon nitride ceramic.
[0050] The material of the floating plate 2 in the embodiment of the application is any one or more of alumina ceramic, zirconia ceramic and silicon nitride ceramic. The alumina ceramic, the zirconia ceramic and the silicon nitride ceramic all have good heat transfer performance and excellent insulation performance, meeting the insulation environment of the core hot pressing. Meanwhile, the alumina ceramic, the zirconia ceramic and the silicon nitride ceramic can all be made into plate parts to serve as the floating plate 2, ensuring that heat can be quickly transferred on the floating plate 2 during the heating and cooling process, so as to improve the core hot pressing efficiency.
[0051] In the first aspect, in some optional embodiments, referring to Figures 1 to 3 The embodiment of the application provides an electric core hot pressing device, and the electric core hot pressing device further comprises a pressing plate (not shown in the figure) located above the floating plate 2 and a driving member (not shown in the figure) for driving the pressing plate to approach or move away from the floating plate 2.
[0052] The embodiment of the application further comprises the pressing plate above the floating plate 2 and the driving member for driving the pressing plate to approach or move away from the floating plate 2, and the driving member and the pressing plate cooperate to extrude the core on the floating plate 2, so as to provide the required pressure during the core hot pressing.
[0053] For example, the driving member in the embodiment adopts a booster cylinder. During the core hot pressing and shaping process, the booster cylinder receives a downward pressing signal at the same time, and the heating module 4 on the floating plate 2 starts heating to heat the floating plate 2. After the booster cylinder drives the pressing plate to complete the downward pressing and shaping of the core, a lifting signal is sent to the booster cylinder, and at the same time, the refrigeration module 5 on the floating plate 2 starts working and the heating module 4 stops working, so that the refrigeration module 5 cools the floating plate 2. After the floating plate 2 is cooled to a set temperature, the unloading mechanical arm clamps the core on the floating plate 2 and places the core in the unloading tray.
[0054] In the first aspect, in some optional embodiments, referring to Figures 1 to 3 Figures 1 to 3 The second aspect of the embodiment of the application provides a hot pressing machine, which comprises:
[0055] The electric core hot pressing device of any one of the above embodiments.
[0056] The hot pressing machine of the embodiment of the application adopts the electric core hot pressing device of any one of the above embodiments, so that the floating plate 2 in contact with the surface of the core after the hot pressing is cooled quickly, and the surface of the core is not adhered to the floating plate 2 due to the negative pressure difference caused by high temperature and high pressure, effectively solving the problem of the core adhering to the plate surface after the hot pressing.
[0057] In addition, through structure optimization, the damage of the surface diaphragm and the pole piece of the core caused by the core adhering to the plate after the hot pressing is avoided, the safety performance of the core is improved, the product competitiveness is enhanced, and the yield of the production line is improved. The problem of the unloading mechanical arm device alarm failure caused by the core adhering to the plate during the hot pressing process is also avoided, the production efficiency is improved, and the equipment failure rate is reduced.
[0058] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0059] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.
[0060] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.
Claims
1. A battery cell hot pressing device, characterized in that, The device comprises: a plate unit, which comprises a heating plate (1) and a floating plate (2), and elastic elements (3) are arranged on the heating plate (1) for floatingly supporting the floating plate (2); a temperature adjusting unit, which comprises a heating module (4) arranged on the floating plate (2) and used for heating the floating plate (2), and a refrigeration module (5) arranged on the floating plate (2) and used for cooling the floating plate (2).
2. The device according to claim 1, wherein: the floating plate (2) and the heating plate (1) are parallel to each other, and a guide block (6) is fixedly connected to one side of the floating plate (2) close to the heating plate (1), and one end of the guide block (6) away from the floating plate (2) extends into the interior of the heating plate (1) and is in sliding connection with the heating plate (1) perpendicularly.
3. The device according to claim 2, wherein: the heating plate (1) is provided with a cavity and a limiting shell (7) located in the cavity, one end of the guide block (6) away from the floating plate (2) extends into the limiting shell (7) and is in sliding connection with the limiting shell (7), and a stop block (8) is arranged on the guide block (6) to prevent the guide block (6) from disengaging from the limiting shell (7).
4. The device according to claim 3, wherein: the elastic elements (3) are installed in the limiting shell (7), and the upper ends of the elastic elements (3) are fixedly connected to the bottom of the guide block (6).
5. The device according to claim 2, wherein: the guide block (6) is provided with a cavity with an opening facing the bottom surface of the floating plate (2), and the temperature adjusting unit is arranged on the bottom surface of the floating plate (2) and located in the cavity.
6. The device according to claim 1, wherein: the heating module (4) is any one of a heating resistor, a heating sheet and an electric heating wire.
7. The device according to claim 1, wherein: the refrigeration module (5) is any one of a thermoelectric refrigerator, a refrigeration heat exchanger and a semiconductor refrigeration sheet.
8. The device according to claim 1, wherein: the material of the floating plate (2) is any one of alumina ceramic, zirconia ceramic and silicon nitride ceramic.
9. The device according to claim 1, further comprising a pressing plate located above the floating plate (2) and a driving member for driving the pressing plate to approach or move away from the floating plate (2). The device comprises:
10. A hot press characterized in that, the device for pressing an electric core according to any one of claims 1 to 9.