Battery hot-pressing device and battery hot-pressing processing system

Abstract

The utility model belongs to the technical field of battery production, and particularly relates to a battery hot-pressing device which comprises a heat preservation frame, a hot-pressing device and a hot-pressing device, the plurality of hot pressing plates are correspondingly mounted in the accommodating areas; the plurality of heating plates are correspondingly mounted in the accommodating areas and are positioned below the hot pressing plate; wherein the plurality of heating plates are used for realizing different heating temperatures; the battery hot-pressing device has the beneficial effects that the partition heating of the battery hot-pressing device can be realized, the hot-pressing plates in different accommodating areas are heated according to the size of a battery cell needing to be subjected to hot-pressing processing, and the energy consumption is reduced by reducing the heating area, so that the effects of saving the cost and improving the economic benefit are achieved. In addition, the heat insulation plates are arranged to separate the accommodating areas, so that the heat loss in the accommodating areas can be effectively prevented, and the temperature rise in the battery cell is accelerated.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and particularly relates to a battery hot pressing device and a battery hot pressing processing system. Background Art

[0002] At present, in the preparation process of batteries, the battery cells made of positive electrode sheets, negative electrode sheets and separators by winding or laminating are usually in a fluffy state and need to be hot pressed. The purpose of the hot pressing process is to heat the binder in the battery cell, so that the positive and negative electrode sheets and the separator are bonded together under the combined action of temperature and pressure, and the distance between each layer of electrode sheets is kept highly consistent, thereby solving the problem of battery cell deformation caused by the expansion of the negative electrode after charging and effectively improving the chemical performance of secondary batteries.

[0003] The working principle of a battery hot pressing device is usually to heat a hot pressing plate to a set temperature by using a heating plate, and then place the battery cell on the hot pressing plate and apply pressure to achieve the hot pressing effect. In the prior art, most battery hot pressing devices heat the entire heating plate during operation, so that the battery hot pressing device can be compatible with battery cells of different sizes. However, during the production and preparation of small-sized battery cells, heating the entire heating plate easily causes large energy consumption waste and high production costs. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery hot pressing device and a battery hot pressing processing system for solving the above problems in view of the existing technical problems.

[0005] In view of this, the utility model provides a battery hot pressing device, including:

[0006] A heat preservation frame, the heat preservation frame includes a plurality of heat insulation plates, and the heat insulation plates divide the inside of the heat preservation frame along the first direction X into a plurality of accommodation areas;

[0007] A plurality of hot pressing plates, and the plurality of hot pressing plates are correspondingly installed in each accommodation area;

[0008] A plurality of heating plates, and the plurality of heating plates are correspondingly installed in each accommodation area and are located below the hot pressing plates;

[0009] Wherein, the plurality of heating plates are used to achieve different heating temperatures.

[0010] Further, the plurality of heat insulation plates are integrally formed with the heat preservation frame or detachably and fixedly connected.

[0011] Further, the heating plate is an electric heating plate.

[0012] Further, the heating plate includes:

[0013] A power supply terminal, and the power supply terminal is used for electrically connecting with an external heating power supply;

[0014] Among them, a heating power supply through hole communicating with the power supply terminal is provided on the heat preservation frame.

[0015] Furthermore, the hot pressing plate includes:

[0016] A temperature sensor for measuring the hot pressing temperature in real time;

[0017] Among them, a wiring hole communicating with the temperature sensor is provided on the heat preservation frame.

[0018] Furthermore, the temperature sensor includes a monitoring temperature sensor and a control temperature sensor.

[0019] Furthermore, the hot pressing plate further includes:

[0020] A gas transmission channel provided on the hot pressing plate and communicating with the end face of the hot pressing plate for contacting and extruding the battery cell;

[0021] Among them, an air inlet through hole communicating with the gas transmission channel is provided on the heat preservation frame.

[0022] Furthermore, the gas transmission channel includes:

[0023] A groove provided on the end face of the hot pressing plate away from the battery cell;

[0024] A plurality of air blowing holes are all provided on the end face of the hot pressing plate for contacting and extruding the battery cell and communicating with the groove.

[0025] A battery hot pressing processing system includes the battery hot pressing device of any one of the above, and further includes:

[0026] A power supply module for supplying power to the battery hot pressing processing system;

[0027] A host computer for reading the temperature information of the battery hot pressing device, setting the target temperature, controlling the heating on and off, and recording faults;

[0028] A temperature control module communicatively connected to the host computer for analyzing and processing the temperature of the heating plate;

[0029] A temperature acquisition module communicatively connected to the temperature control module for acquiring the temperature information of each temperature sensor and feeding it back to the temperature control module.

[0030] Furthermore, it further includes:

[0031] A solid state relay module connected to a power supply, communicatively connected to the temperature control module, and used for controlling the power supply for the heating of the hot pressing plate.

[0032] The beneficial effects of the present utility model are:

[0033] It can achieve zoned heating of the battery hot pressing device. According to the size of the battery cell to be hot pressed, the hot pressing plates in different accommodation areas are heated, and the energy consumption is reduced by reducing the heating area, so as to achieve the effect of cost saving and improved economic benefits. In addition, by setting heat insulation plates to separate each accommodation area, the heat loss in the accommodation area can be effectively prevented, thus accelerating the temperature rise inside the battery cell. Description of the Drawings

[0034] Figure 1 is an exploded structural view of the battery hot pressing device in the present utility model;

[0035] Figure 2 is a working flow chart of the battery hot pressing processing system in the present utility model;

[0036] The markings in the figure are shown as:

[0037] 1. Heat preservation frame; 2. Heat insulation plate; 3. Hot pressing plate; 4. Heating plate; 5. Power supply terminal; 6. Temperature sensor; 7. Air delivery channel; X. First direction. Specific Embodiments

[0038] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of each part shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] Embodiment 1:

[0041] This embodiment provides a battery hot pressing device, including:

[0042] Heat preservation frame 1, the heat preservation frame 1 includes several heat insulation boards 2, and the heat insulation boards 2 divide the inside of the heat preservation frame 1 along the first direction X into several accommodation areas;

[0043] Several hot pressing plates 3, and several hot pressing plates 3 are correspondingly installed in each accommodation area;

[0044] Several heating plates 4, and several heating plates 4 are correspondingly installed in each accommodation area and are located below the hot pressing plates 3;

[0045] Among them, several heating plates 4 are used to achieve different heating temperatures.

[0046] Furthermore, multiple heat insulation boards 2 are integrally formed with the heat preservation frame 1 or detachably and fixedly connected.

[0047] Furthermore, the heating plate 4 is an electric heating plate 4.

[0048] In this technical solution, both the heat preservation frame 1 and the heat insulation boards 2 are made of heat preservation materials. The number of heat insulation boards 2 can be multiple. The multiple heat insulation boards 2 divide the inside of the heat preservation frame 1 into multiple accommodation areas along the first direction X. The multiple heat insulation boards 2 are integrally formed with the heat preservation frame 1 or detachably and fixedly connected. The sizes of each accommodation area can be equal or unequal. Then, heating plates 4 with appropriate sizes are installed in each accommodation area. The heating plates 4 are internally provided with electric heating wires, and the electric heating wires are electrically connected to an external heating power supply. Then, hot pressing plates 3 with appropriate sizes are installed above the heating plates 4 and are located within the accommodation areas, so that the heat generated by the heating plates 4 can be transferred to the hot pressing plates 3.

[0049] When this battery hot pressing device works, according to the size of the battery cell to be hot pressed, the battery cell is placed on a plane composed of a single hot pressing plate 3 or multiple hot pressing plates 3. Then, according to the area of the hot pressing plate 3 covered by the battery cell, the external heating power supply is started to heat the heating plates 4 corresponding to the covered area, so that the hot pressing plates 3 in the covered area reach the specified temperature. Then, an external pressing device is driven to press the battery cell, so that the positive and negative electrode plates and the separator are bonded into one body under the combined action of temperature and pressure, and the hot pressing effect of the battery cell is achieved.

[0050] In summary, through this structural design, zoned heating of the battery hot pressing device can be realized. According to the size of the battery cell to be hot pressed, the hot pressing plates 3 in different accommodation areas are heated, and the energy consumption is reduced by reducing the heating area, so as to achieve the effects of cost saving and economic benefit improvement. In addition, by arranging heat insulation boards 2 to separate each accommodation area, the heat loss in the accommodation area can be effectively prevented, thereby accelerating the temperature rise inside the battery cell.

[0051] Embodiment 2:

[0052] This embodiment provides a battery hot pressing device, which, in addition to including the technical solutions of the above embodiments, further has the following technical features.

[0053] Further, the heating plate 4 includes:

[0054] A power supply terminal 5, which is used for electrically connecting with an external heating power supply;

[0055] Among them, a heating power supply through hole communicating with the power supply terminal 5 is provided on the heat preservation frame 1.

[0056] In this technical solution, a plurality of heating power supply through holes are opened on the side wall of the heat preservation frame 1. The plurality of heating power supply through holes are respectively communicated with each accommodating area, and the power supply terminals 5 of each heating plate 4 pass through the heating power supply through holes to be electrically connected with the external heating power supply.

[0057] Embodiment 3:

[0058] This embodiment provides a battery hot pressing device, which, in addition to including the technical solutions of the above embodiments, further has the following technical features.

[0059] Further, the hot pressing plate 3 includes:

[0060] A temperature sensor 6, which is used for measuring the hot pressing temperature in real time;

[0061] Among them, a wiring hole communicating with the temperature sensor 6 is provided on the heat preservation frame 1.

[0062] Further, the temperature sensor 6 includes a monitoring temperature sensor and a control temperature sensor.

[0063] A plurality of wiring holes are also opened on the side wall of the heat preservation frame 1. The plurality of wiring holes are also respectively communicated with each accommodating area. The temperature measuring probe of the temperature sensor 6 is connected to the hot pressing plate 3, and the temperature sensor 6 is electrically connected to an external control system through the wiring hole. The temperature sensor 6 includes a monitoring temperature sensor and a control temperature sensor. The monitoring temperature sensor is used for measuring and recording the temperature in real time, providing temperature data for monitoring and analysis; the control temperature sensor is used for feeding back the temperature data to the control system, and the control system automatically adjusts according to the temperature data to keep the temperature within a preset range.

[0064] Embodiment 4:

[0065] This embodiment provides a battery hot pressing device, which, in addition to including the technical solutions of the above embodiments, further has the following technical features.

[0066] Further, the hot pressing plate 3 further includes:

[0067] A gas transmission channel 7 is provided on the hot pressing plate 3 and is communicated with the end face of the hot pressing plate 3 for contacting and extruding the battery cell.

[0068] Among them, an air intake through hole communicated with the gas transmission channel 7 is provided on the heat preservation frame 1.

[0069] In this technical solution, an external hair dryer is communicated with the gas transmission channel 7 on the hot pressing plate 3 through the air intake through hole. The hair dryer is turned on to blow air into the gas transmission channel 7, and then the air flow is output from the end face of the hot pressing plate 3 for contacting and extruding the battery cell through the gas transmission channel 7, so as to blow air on the battery cell during hot pressing, effectively preventing the battery cell from adhering to the hot pressing plate 3 during the hot pressing process.

[0070] Embodiment 5:

[0071] This embodiment provides a battery hot pressing device, which, in addition to including the technical solution of the above embodiment, further has the following technical features.

[0072] Further, the gas transmission channel 7 includes:

[0073] A groove is provided on the end face of the hot pressing plate 3 away from the battery cell;

[0074] A plurality of air blowing holes are provided on the end face of the hot pressing plate 3 for contacting and extruding the battery cell, and are communicated with the groove.

[0075] In this technical solution, as Figure 1 shown, a groove is opened on the end face of the hot pressing plate 3 in contact with the heating plate 4, and a plurality of air blowing holes are opened at the bottom of the groove. The air blowing holes penetrate through the hot pressing plate 3. When the hot pressing plate 3 is installed above the heating plate 4, an air ventilation pipeline for gas flow is formed between the groove of the hot pressing plate 3 and the heating plate 4. Then, the gas transported by the hair dryer into the air ventilation pipeline will be output from the end face of the hot pressing plate 3 for contacting and extruding the battery cell through each air blowing hole, so as to blow air on the battery cell during hot pressing. The structural design of the gas transmission channel 7 realizes the function of blowing air on the battery cell, and at the same time has a simple structure, is convenient for production and processing, and has high practicability.

[0076] Embodiment 6:

[0077] This embodiment provides a battery hot pressing processing system, which includes a battery hot pressing device according to any one of the above Embodiments 1-5, and further includes:

[0078] A power supply module for supplying power to the battery hot pressing processing system;

[0079] An upper computer for reading the temperature information of the battery hot pressing device, setting the target temperature, controlling the heating on and off, and recording faults;

[0080] The temperature control module is communicatively connected to the host computer and is used for analyzing and processing the temperature of the heating plate 4;

[0081] The temperature acquisition module is communicatively connected to the temperature control module and is used for acquiring the temperature information of each temperature sensor 6 and feeding it back to the temperature control module.

[0082] In this technical solution, taking the number of accommodation areas of the battery hot pressing device as three as an example for illustration, as Figure 2 shown, the power supply module supplies power to the battery hot pressing processing system. The temperature control module is connected to the host computer and the temperature acquisition module through an RS485 communication line. During the process of cell hot pressing, first, according to the type and size of the cell to be hot pressed, the host computer controls one or more of the first heating plate, the second heating plate, or the third heating plate to start heating. Then, the temperature acquisition module feeds back the temperature information of the corresponding control temperature sensor and the monitoring temperature sensor to the temperature control module (the first heating plate corresponds to the first control temperature sensor and the first monitoring temperature sensor, the second heating plate corresponds to the second control temperature sensor and the second monitoring temperature sensor, and the third heating plate corresponds to the third control temperature sensor and the third monitoring temperature sensor). After analyzing and processing the temperature information, the temperature control module feeds it back to the host computer. If the temperature of the hot pressing plate 3 reaches the target temperature set by the host computer, the host computer controls the heating plate 4 to stop heating, and the hot pressing work is completed.

[0083] Furthermore, it further includes:

[0084] The solid-state relay module is connected to a power supply, communicatively connected to the temperature control module, and is used for controlling the power supply for the heating of the hot pressing plate 3.

[0085] The solid-state relay module is connected to the temperature control module through a gray cable. The solid-state relay module correspondingly turns on or off the heating circuits of the heating plates 4 in each accommodation area. By setting the solid-state relay module, when the heating plate 4 undergoes severe working conditions (such as circuit overload, overcurrent, overvoltage, etc.) during the heating process, the solid-state relay module can disconnect the heating circuit of the heating plate 4 to stop the heating plate 4 from heating, thus playing a protective role.

[0086] The embodiments of the present application have been described above with reference to the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A battery hot pressing device, characterized in that, Comprising: A heat preservation frame (1), the heat preservation frame (1) comprising a plurality of heat insulation plates (2), and the heat insulation plates (2) dividing the interior of the heat preservation frame (1) along a first direction (X) into a plurality of accommodation areas; A plurality of hot pressing plates (3), the plurality of hot pressing plates (3) being correspondingly installed in each accommodation area; A plurality of heating plates (4), the plurality of heating plates (4) being correspondingly installed in each accommodation area and located below the hot pressing plates (3); Wherein, the plurality of heating plates (4) are used to achieve different heating temperatures.

2. The battery hot pressing device according to claim 1, wherein The plurality of heat insulation plates (2) are integrally formed with or detachably and fixedly connected to the heat preservation frame (1).

3. The battery hot pressing device according to claim 1, characterized in that, The heating plate (4) is an electric heating plate (4).

4. The battery hot pressing device according to claim 3, characterized in that, The heating plate (4) comprises: A power supply terminal (5), the power supply terminal (5) being used for electrically connecting with an external heating power supply; Wherein, a heating power supply through hole communicating with the power supply terminal (5) is provided on the heat preservation frame (1).

5. The battery hot pressing device according to claim 1, wherein The hot pressing plate (3) comprises: A temperature sensor (6), the temperature sensor (6) being used for measuring the hot pressing temperature in real time; Wherein, a wiring hole communicating with the temperature sensor (6) is provided on the heat preservation frame (1).

6. The battery hot pressing device according to claim 5, characterized in that, The temperature sensor (6) comprises a monitoring temperature sensor and a control temperature sensor.

7. The battery hot pressing device according to claim 1, characterized in that, The hot pressing plate (3) further comprises: An air delivery channel (7), the air delivery channel (7) being arranged on the hot pressing plate (3) and communicating with an end face of the hot pressing plate (3) for contacting and extruding the battery cell; Wherein, an air inlet through hole communicating with the air delivery channel (7) is provided on the heat preservation frame (1).

8. The battery hot pressing device according to claim 7, wherein, The air delivery channel (7) comprises: A groove, the groove being arranged on an end face of the hot pressing plate (3) away from the battery cell; A plurality of air blowing holes, the plurality of air blowing holes being all arranged on an end face of the hot pressing plate (3) for contacting and extruding the battery cell and communicating with the groove.

9. A battery hot pressing processing system, characterized in that, Comprising the battery hot pressing device according to any one of the above claims 1-8, further comprising: A power supply module, the power supply module being used for supplying power to the battery hot pressing processing system; An upper computer, the upper computer being used for reading temperature information of the battery hot pressing device, setting a target temperature, turning on and off heating, and recording faults; A temperature control module, the temperature control module being communicatively connected with the upper computer and used for analyzing and processing the temperature of the heating plate (4); A temperature acquisition module, the temperature acquisition module being communicatively connected with the temperature control module and used for acquiring temperature information of each temperature sensor (6) and feeding it back to the temperature control module.

10. The battery hot pressing processing system according to claim 9, characterized in that, Further comprising: A solid state relay module, the solid state relay module being connected to a power supply, communicatively connected with the temperature control module, and used for controlling the power supply for heating of the hot pressing plate (3).

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