Heat-sealing head mechanism, heat-sealing device and processing system

Abstract

A heat-sealing head mechanism, a heat-sealing device, and a processing system. The heat-sealing head mechanism comprises: a heating assembly, which comprises a switching module and a heating element, wherein the heating element is connected to an external power source by means of the switching module; a temperature control assembly, which comprises a temperature controller and a first temperature sensor connected to an input terminal of the temperature controller, wherein the first temperature sensor is connected to a first temperature acquisition point on the heating element, and an output terminal of the temperature controller is connected to the switching module; and a control assembly, which comprises a controller and a second temperature sensor connected to an input terminal of the controller, wherein the second temperature sensor is connected to a second temperature acquisition point on the heating body, and an output terminal of the controller is connected to the switching module. When the temperature of the heating element exceeds a certain value, the switching module is controlled by the temperature controller or the controller to disconnect the heating body from the external power source, such that the occurrence of the over-temperature of the heating element in the heat-sealing head mechanism can be reduced, thereby improving the reliability of the heat-sealing device.

Description

Heat sealing head mechanism, heat sealing device and processing system

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202421904591.0, filed on August 7, 2024, entitled “Heat sealing head mechanism, heat sealing device and processing system,” the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of batteries, and in particular to a heat sealing head mechanism, a heat sealing device and a processing system. BACKGROUND

[0004] In the production and manufacturing process of soft package battery cells, a heat sealing device is needed to heat seal the soft package battery cells. In related technologies, the battery cell is mainly packaged by an aluminum plastic film. After the aluminum plastic film is punched to form a groove, the battery cell is placed in the groove, and then the aluminum plastic film is folded to complete the packaging of the battery cell. Then the battery cell is packaged by the heat sealing device.

[0005] The heat sealing device includes a heat sealing head mechanism. When the battery cell is packaged by the heat sealing device, the heating body in the heat sealing head mechanism is needed to heat the aluminum plastic film. However, in the current heat sealing process, the possibility of overheating of the heating body is not considered, which may cause the heat sealing device to be damaged due to overheating of the heating body.

[0006] Therefore, how to reduce the overheating of the heating body and improve the reliability of the heat sealing device has become a difficult problem in the industry.

[0007] SUMMARY

[0008] The present application provides a heat sealing head mechanism, a heat sealing device and a processing system, which can reduce the overheating of the heating body in the heat sealing head mechanism and improve the reliability of the heat sealing device.

[0009] In a first aspect, the application provides a heat sealing head mechanism, comprising: a heating assembly comprising a switch module and a heating body, the heating body being connected to an external power source through the switch module; a temperature control assembly comprising a temperature controller and a first temperature sensor connected to an input end of the temperature controller, the first temperature sensor being connected to a first temperature collection point on the heating body, an output end of the temperature controller being connected to the switch module; a control assembly comprising a controller and a second temperature sensor connected to an input end of the controller, the second temperature sensor being connected to a second temperature collection point on the heating body, an output end of the controller being connected to the switch module; wherein the temperature controller acquires a first temperature at the first temperature collection point collected by the first temperature sensor, controls the on duration or off duration of the switch module according to the first temperature, so as to control the working duration or stop duration of the heating body, and controls the switch module to disconnect the connection between the heating body and the external power source in the case that the first temperature exceeds a first temperature threshold; the controller acquires a second temperature at the second temperature collection point collected by the second temperature sensor, and controls the switch module to disconnect the connection between the heating body and the external power source in the case that the second temperature exceeds a second temperature threshold.

[0010] The technical scheme of the embodiment of the application provides a heat sealing head mechanism capable of realizing over-temperature protection, the temperature controller or the controller controls the switch module to disconnect the connection between the heating body and the external power source when the temperature of the heating body exceeds a certain value, so as to reduce the temperature of the heating body and reduce the occurrence of over-temperature of the heating body, realize over-temperature protection of the heat sealing head mechanism, and improve the reliability of the heat sealing device.

[0011] In a possible implementation manner, the switch module comprises a contactless switch and a circuit breaker assembly; an input end of the contactless switch is connected to the external power source through the circuit breaker assembly, and an output end of the contactless switch is connected to the heating body; a first output end of the temperature controller is connected to a control end of the contactless switch, and a second output end of the temperature controller is connected to the circuit breaker assembly; the control assembly comprises an electrical switching device connected to a first output end of the controller, the electrical switching device being connected in series on a connection line between the first output end of the temperature controller and the control end of the contactless switch; wherein the temperature controller outputs a control instruction to the contactless switch according to the first temperature, so as to control the on duration or off duration of the contactless switch, and the temperature controller outputs a control instruction to the circuit breaker assembly in the case that the first temperature is greater than the first temperature threshold, so as to control the circuit breaker assembly to disconnect, so that the connection between the heating body and the external power source is disconnected; the controller outputs a control instruction to the electrical switching device in the case that the second temperature exceeds the second temperature threshold, so as to control the electrical switching device to disconnect the connection between the contactless switch and the temperature controller, so that the connection between the heating body and the external power source is disconnected.

[0012] By the technical scheme of the implementation mode, the temperature of the heat generating body can be controlled through the temperature controller by connecting the temperature controller with the non-contact switch in the switch module, and the controller is connected with the circuit breaker assembly through the electrical switching device and the non-contact switch, so that when the connection between the heat generating body and the external power supply cannot be disconnected through the temperature controller, the electrical switching device can still be controlled to be disconnected through the controller to disconnect the connection between the heat generating body and the external power supply, thereby effectively reducing the occurrence of the heat generating body over-temperature condition and improving the reliability of the heat sealing head mechanism.

[0013] In a possible implementation mode, the non-contact switch includes at least one of the following: a solid-state relay, a thyristor.

[0014] In a possible implementation mode, the switch module further includes a main contactor; the main contactor is arranged between the input end of the non-contact switch and the circuit breaker assembly; the second output end of the controller is connected with the main contactor; and after the controller controls the electrical switching device to disconnect the connection between the non-contact switch and the temperature controller, the controller continues to acquire the second temperature at the second temperature acquisition point collected by the second temperature sensor, and sends a control instruction to the main contactor to control the main contactor to be disconnected when the second temperature exceeds a third temperature threshold.

[0015] By the technical scheme of the implementation mode, the temperature of the heat generating body can be controlled through the temperature controller by connecting the temperature controller with the non-contact switch in the switch module, and the controller is connected with the circuit breaker assembly through the electrical switching device and the non-contact switch, so that when the connection between the heat generating body and the external power supply cannot be disconnected through the temperature controller, the electrical switching device can still be controlled to be disconnected through the controller to disconnect the connection between the heat generating body and the external power supply, thereby effectively reducing the occurrence of the heat generating body over-temperature condition and improving the reliability of the heat sealing head mechanism.

[0016] In a possible implementation mode, the first temperature sensor is further connected with the input end of the controller; and the controller sends a control instruction to the main contactor to control the main contactor to be disconnected when the difference between the first temperature and the second temperature exceeds a fourth temperature threshold.

[0017] By the technical scheme of the implementation mode, the temperature of the heat generating body can be controlled through the temperature controller by connecting the temperature controller with the non-contact switch in the switch module, and the controller is connected with the circuit breaker assembly through the electrical switching device and the non-contact switch, so that when the connection between the heat generating body and the external power supply cannot be disconnected through the temperature controller, the electrical switching device can still be controlled to be disconnected through the controller to disconnect the connection between the heat generating body and the external power supply, thereby effectively reducing the occurrence of the heat generating body over-temperature condition and improving the reliability of the heat sealing head mechanism.

[0018] In a possible implementation, the third output of the controller is connected with the circuit breaker assembly; wherein, after the controller controls the main contactor to be disconnected, the controller continues to acquire the second temperature at the second temperature acquisition point acquired by the second temperature sensor, and sends a control instruction to the circuit breaker assembly to control the circuit breaker assembly to be disconnected when the second temperature exceeds the fifth temperature threshold.

[0019] By the technical scheme of the implementation, the circuit breaker assembly is connected with the controller, so that when the main contactor cannot disconnect the connection between the heat generating body and the external power supply, the controller can still control the circuit breaker assembly to be disconnected to disconnect the connection between the heat generating body and the external power supply, thereby effectively reducing the occurrence of the heat generating body overtemperature and improving the reliability of the heat sealing head mechanism.

[0020] In a possible implementation, the circuit breaker assembly comprises a circuit breaker and a release mechanically connected with the circuit breaker; the second output of the temperature controller and the third output of the controller are connected with the release respectively; wherein, the controller or the temperature controller controls the release to be tripped to make the circuit breaker assembly be disconnected.

[0021] In a possible implementation, the number of the second temperature acquisition points and the number of the second temperature sensors are both plural, different second temperature sensors are connected with different second temperature acquisition points; the control assembly further comprises a temperature collector, the plural second temperature sensors are connected with the controller through the temperature collector; wherein, the temperature collector converts the second temperatures acquired by the plural second temperature sensors into digital signals and transmits the digital signals to the controller.

[0022] By the technical scheme of the implementation, the plural second temperature sensors are arranged to acquire the second temperature, which can improve the accuracy of the second temperature, and the temperature collector 134 is arranged to transmit the plural second temperatures acquired by the plural second temperature sensors 132 to the controller 131 after the plural second temperatures are processed, so that the controller 131 can acquire more accurate second temperature.

[0023] In a second aspect, the application provides a heat sealing device, comprising a first heat sealing head and a second heat sealing head arranged oppositely, and each of the first heat sealing head and the second heat sealing head comprises the heat sealing head mechanism of the first aspect.

[0024] In a third aspect, the application provides a processing system, comprising the heat sealing device of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Features, advantages, and technical effects of the exemplary embodiments of the application will be described below with reference to the accompanying drawings.

[0026] FIG. 1 is a schematic view of a heat sealing head mechanism according to some embodiments of the application;

[0027] Figure 2 is a schematic diagram of another heat sealing head mechanism according to some embodiments of this application;

[0028] Figure 3 is a schematic diagram of another heat sealing head mechanism according to some embodiments of this application;

[0029] Figure 4 is a schematic diagram of another heat sealing head mechanism according to some embodiments of this application;

[0030] Figure 5 is a schematic diagram of another heat sealing head mechanism according to some embodiments of this application;

[0031] Figure 6 is a schematic diagram of another heat sealing head mechanism according to some embodiments of this application;

[0032] Figure 7 is a schematic diagram of another heat sealing head mechanism according to some embodiments of this application;

[0033] Figure 8 is a schematic diagram of a heat sealing device according to some embodiments of this application.

[0034] Icons: 11-Heating assembly; 111-Switch module; 1111-Contactless switch; 1112-Circuit breaker assembly; 11121-Circuit breaker; 11122-Trip unit; 1113-Main contactor; 112-Heating element; 12-Temperature control assembly; 121-Temperature controller; 122-First temperature sensor; 13-Control assembly; 131-Controller; 132-Second temperature sensor; 133-Electrical switching device; 134-Temperature data acquisition unit; 20-External power supply; 31-First heat seal head; 32-Second heat seal head.

[0035] The accompanying drawings are not necessarily drawn to scale. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in the application have the same meanings as those commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The description and drawings are to be regarded as illustrative in nature and embodiments of the application will be readily apparent to those skilled in the art, and various changes and modifications can be applied to the embodiment without departing from the scope of the application. The following description is exemplary of the preferred embodiments only and is not intended to limit the scope, applicability or configuration of the application in any way. Various changes to the shape, size and configuration of the preferred embodiments are possible and are encompassed by the scope of the application. The terms "comprise", "comprising", "comprises", "include", "including", "includes", "contain", "containing", "contains", "characterized by" and "characterised by" as used herein are used in their broadest and most general sense, and are not intended to limit the scope of the application. The terms "first", "second", "third", etc. as used in the description and the claims are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are not intended to limit the scope of the application.

[0038] Reference throughout this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive.

[0039] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication of two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the application can be understood according to the specific circumstances.

[0040] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0041] "Multiple" appearing in the application means more than two (including two).

[0042] In the application, the battery cell can include, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery or a magnesium ion battery, etc. The battery cell includes, but is not limited to, a cylinder, a flat body, a cuboid or other shapes, etc. The battery cell generally includes cylindrical battery cells, square battery cells and soft package battery cells, etc. in the form of packaging.

[0043] In the process of heat sealing the battery cell, the aluminum plastic film needs to be heated above its melting point by the heat sealing device, so that the film material changes from solid to liquid. In the molten state of the film material, by applying pressure to the film material, the molten film material is tightly combined. Under the action of heat and pressure, the thermoplastic polymer material melts and adheres to each other. When cooled, these materials change back to solid state, forming strong adhesion, thereby achieving effective heat sealing. In general, the heat sealing of the aluminum plastic film is a multi-step operation involving physical and chemical processes, in which the application of heat and pressure is a key factor, and by precisely controlling these factors, the quality and reliability of heat sealing can be improved.

[0044] In the heat sealing device, the heating of the aluminum plastic film is mainly realized by the heating body in the heat sealing head mechanism. However, during the heating process, the heating body may overheat, that is, the temperature of the heating body may exceed the set upper limit. The overheating of the heating body will damage the parts of the heat sealing device, especially the heating body, resulting in reduced reliability of the heat sealing device.

[0045] Therefore, in order to reduce the overheating of the heating body and improve the reliability of the heat sealing device, the embodiments of the present application provide a heat sealing head mechanism, a heat sealing device and a processing system. By setting a control component in the heat sealing head mechanism to protect the heating body from overheating, the overheating of the heating body is reduced, and the reliability of the heat sealing device is improved.

[0046] First, the heat sealing head mechanism provided by the embodiments of the present application will be introduced.

[0047] Referring to FIG. 1, it is a schematic diagram of a heat sealing head mechanism provided by the embodiments of the present application, as shown in FIG. 1, the heat sealing head mechanism at least includes: a heating assembly 11, a temperature control assembly 12 and a control assembly 13.

[0048] The heating assembly 11 is mainly used for heating the aluminum plastic film and the like, the temperature control assembly 12 is mainly used for adjusting the temperature of the heating assembly 11, and when the heating assembly 11 overheats, the heating assembly 11 is controlled to stop heating, thereby playing a first layer of protection, and the control assembly 13 is mainly used for controlling the heating assembly 11 to stop heating when the heating assembly 11 overheats, thereby playing a second layer of protection.

[0049] As shown in FIG. 1, the heating assembly 11 includes a switch module 111 and a heating body 112, wherein the heating body 112 is connected with the external power supply 20 through the switch module 111.

[0050] The temperature control component 12 includes a temperature controller 121 and a first temperature sensor 122 connected to an input end of the temperature controller 121. The first temperature sensor 122 is connected to a first temperature collection point on the heating body 112, and is configured to collect a first temperature at the first temperature collection point and feed back the first temperature to the temperature controller 121. An output end of the temperature controller 121 is connected to the switch module 111 in the heating component 11, and the temperature controller 121 is configured to adjust a conduction duration or a disconnection duration of the switch module 111 according to the first temperature, so as to control a working duration or a stopping duration of the heating body 112, so that the temperature of the heating body 112 reaches a specified temperature, and the temperature controller 121 is further configured to control the switch module 111 to disconnect the connection between the heating body 112 and the external power supply 20 when the first temperature is greater than a first temperature threshold, so as to realize over-temperature protection of the heating body 112. The first temperature threshold can be set according to actual conditions.

[0051] The control component 13 includes a controller 131 and a second temperature sensor 132 connected to an input end of the controller 131. The second temperature sensor 132 is connected to a second temperature collection point on the heating body 112, and is configured to collect a second temperature at the second temperature collection point and feed back the second temperature to the controller 131. An output end of the controller 131 is connected to the switch module 111 in the heating component 11, and the controller 131 is configured to control the switch module 111 to disconnect the connection between the heating body 112 and the external power supply when the second temperature exceeds a second temperature threshold, so as to realize over-temperature protection of the heating body 112. The second temperature threshold can be set according to actual conditions.

[0052] As shown in FIG. 1, the first temperature collection point and the second temperature collection point are located at different positions on the heating body 112, so that the first temperature sensor 122 and the second temperature sensor 132 can collect temperature data at multiple positions on the heating body 112 in real time, so as to establish effective temperature monitoring of the heating body 112 during the whole heating process. For example, as shown in FIG. 2, the first temperature collection point 1121 is located at a middle position of the heating body 112, and the second temperature collection point 1122 is located at other positions except the middle position. Since the temperatures at different positions on the heating body 112 at the same time can be different, the first temperature and the second temperature collected at the same time can be different, and the first temperature threshold and the second temperature threshold can also be different.

[0053] From the above, the over-temperature protection of the heat-generating body 112 can be realized by the temperature control assembly 12 and the control assembly 13. The temperature control assembly 12 protects the heat-generating body 112 based on the first temperature and the first temperature threshold, and the control assembly 13 protects the heat-generating body 112 based on the second temperature and the second temperature threshold. In this way, the multi-layer over-temperature protection mechanism of the heat-generating body 112 can be realized by the temperature control assembly 12 and the control assembly 13. When one of the over-temperature protection mechanisms fails, the other over-temperature protection mechanism can still effectively cut off the connection between the heat-generating body 112 and the external power supply 20, thereby reducing the occurrence of heat-generating body over-temperature phenomenon, and improving the reliability of the heat sealing head mechanism.

[0054] As shown in FIG. 1, the heating assembly 11 and the temperature control assembly 12 form a first heating circuit, and the heating assembly 11 and the control assembly 13 form a second heating circuit. The working principle of the heat sealing head mechanism is as follows: the external power supply 20 supplies power to the heat-generating body 112 through the switch module 111, and the heat-generating body 112 converts the electrical energy into heat energy to realize heating. In the heating process, the first heating circuit and the second heating circuit run in parallel. The first temperature sensor 122 in the first heating circuit collects the first temperature at the first temperature collection point of the heat-generating body 112, and the temperature controller 121 controls the on duration or off duration of the switch module 111 according to the first temperature, so as to control the working duration or stopping duration of the heat-generating body 112, so that the heat-generating body 112 reaches the specified temperature. The temperature controller 121 also compares the first temperature with the first temperature threshold, and determines that the heat-generating body 112 is over-temperature when the first temperature is greater than the first temperature threshold, and then controls the switch module 111 to disconnect the connection between the heat-generating body 112 and the external power supply 20, so that the heat-generating body 112 stops heating because it cannot receive electrical energy, thereby achieving the first layer of protection. The second temperature sensor 132 in the second heating circuit collects the second temperature at the second temperature collection point of the heat-generating body 112, and the controller 131 compares the second temperature with the second temperature threshold, and determines that the heat-generating body 112 is over-temperature when the second temperature is greater than the second temperature threshold, and then controls the switch module 111 to disconnect the connection between the heat-generating body 112 and the external power supply 20, so that the heat-generating body 112 stops heating because it cannot receive electrical energy, thereby achieving the second layer of protection.

[0055] In some embodiments, the heat generator 112 includes, but is not limited to, an electric heating element in a tubular, block, strip, sheet, etc. structure, the electric heating element refers to a heating element capable of converting electrical energy into heat energy, so that by controlling the on duration or off duration of the switch module 111, the working duration or stop duration of the heat generator 112 can be controlled. For example, the heat generator 112 can be a tubular electric heating element with a metal tube as a shell, a spiral electric heating alloy wire uniformly distributed along the central axis of the tube, and the space filled with compacted magnesium oxide sand with good insulation and heat conduction performance, and the tube opening is sealed with silica gel.

[0056] In some embodiments, as shown in FIG. 2, the switch module 111 includes a contactless switch 1111 and a circuit breaker assembly 1112.

[0057] The input end of the contactless switch 1111 is connected with the external power supply 20 through the circuit breaker assembly 1112, and the output end of the contactless switch 1111 is connected with the heat generator 112.

[0058] The first output end of the temperature controller 121 is connected with the control end of the contactless switch 1111, and the second output end of the temperature controller 121 is connected with the circuit breaker assembly 1112.

[0059] The control assembly 13 includes an electrical switching device 133 connected with the first output end of the controller 131, and the electrical switching device 133 is connected in series on the connection line between the temperature controller 121 and the control end of the contactless switch 1111.

[0060] The contactless switch 1111 includes, but is not limited to, thyristor, solid-state relay, etc.

[0061] The circuit breaker assembly 1112 includes, but is not limited to, a trip circuit breaker composed of a trip device and a circuit breaker, and other circuit breaker structures.

[0062] The electrical switching device 133 includes, but is not limited to, a relay, a contactor, and other devices for opening and closing a circuit.

[0063] Wherein, the temperature controller 121 performs PID (proportional-integral-derivative) control on the contactless switch 1111 according to the first temperature, and outputs a control instruction for controlling the on duration or off duration of the contactless switch 1111 to the contactless switch 1111, so as to control the on duration or off duration of the contactless switch 1111, so that the heat generator 112 reaches the specified temperature. Wherein, the PID control algorithm used by the temperature controller 121 can be set according to the actual situation.

[0064] When the first temperature is greater than the first temperature threshold, the temperature controller 121 outputs a control command to the circuit breaker assembly 1112 to control the circuit breaker assembly 1112 to disconnect, thereby disconnecting the connection between the heating element 112 and the external power supply 20, so that the heating element 112 can no longer receive the electrical energy provided by the external power supply 20, and thus stops heating.

[0065] When the second temperature exceeds the second temperature threshold, the controller 131 outputs a control command to the electrical switching device 133 to disconnect the electrical switching device 133. This disconnects the connection between the contactless switch 1111 and the thermostat 121, thus disconnecting the heating element 112 from the external power supply 20. By cutting off the connection between the contactless switch 1111 and the thermostat 121, the first heating circuit consisting of the heating component 11 and the temperature control component 12 is broken. This prevents the contactless switch 1111 from receiving the control command sent by the thermostat 121, thus preventing it from providing power to the heating element 112 and reducing its temperature.

[0066] Considering that in practical applications, the thermostat 121 may fail to control the circuit breaker assembly 1112 to disconnect due to reasons such as damage to the thermostat 121 or damage to the connection between the circuit breaker assembly 1112 and the thermostat 121, the heating element 112 may still be at risk of overheating even after the thermostat 121 controls the circuit breaker assembly 1112 to disconnect. In this embodiment, by setting an electrical switching device 133 between the thermostat 121 and the contactless switch 1111, and connecting the electrical switching device 133 to the output terminal of the controller 131, the connection between the heating element 112 and the external power supply 20 can still be disconnected by controlling the electrical switching device 133 when the thermostat 121 cannot disconnect the connection between the heating element 112 and the external power supply 20. This effectively reduces the occurrence of overheating of the heating element and improves the reliability of the heat sealing head mechanism.

[0067] In some embodiments, as shown in FIG3, the switch module 111 may include a main contactor 1113 in addition to the contactless switch 1111 and the circuit breaker assembly 1112.

[0068] The main contactor 1113 is located between the contactless switch 1111 and the circuit breaker assembly 1112.

[0069] The second output terminal of the controller 131 is connected to the main contactor 1113.

[0070] The main contactor 1113 includes, but is not limited to, electromagnetic contactors, pneumatic contactors, and hydraulic contactors.

[0071] Wherein, the controller 131 continues to acquire the second temperature at the second temperature acquisition point collected by the second temperature sensor 132 after controlling the electrical switching device 133 to disconnect the connection between the non-contact switch 1111 and the temperature controller 121, and controls the main contactor 1113 to be disconnected in the case that the second temperature exceeds a third temperature threshold. Wherein, the third temperature threshold can be set according to actual conditions, and the third temperature threshold can be the same as or different from the second temperature threshold.

[0072] In view of the fact that in actual application process, the connection between the heating body 112 and the external power supply 20 may be unable to be disconnected through the electrical switching device 133 due to damage of the non-contact switch 1111, damage of the electrical switching device 133, etc., resulting in that the heating body 112 still has the risk of over-temperature after the controller 131 controls the electrical switching device 133 to disconnect the connection between the non-contact switch 1111 and the temperature controller 121, and in the embodiment, the main contactor 1113 is arranged and connected with the output end of the controller 131, so that when the connection between the heating body 112 and the external power supply 20 cannot be disconnected through the electrical switching device 133, the connection between the heating body 112 and the external power supply 20 can still be disconnected by controlling the main contactor 1113 to be disconnected, thereby effectively reducing the occurrence of the heating body over-temperature and improving the reliability of the heat sealing head mechanism.

[0073] In some embodiments, as shown in FIG. 4, the first temperature sensor 122 can be connected with the input end of the controller 131 in addition to being connected with the temperature controller 121, so that the controller 131 can also acquire the first temperature at the first acquisition point collected by the first temperature sensor 122.

[0074] Based on this, the controller 131 can acquire the first temperature at the same time of acquiring the second temperature, and calculate the difference between the first temperature and the second temperature, and control the main contactor 1113 to be disconnected in the case that the absolute value of the difference between the first temperature and the second temperature is greater than a fourth temperature threshold.

[0075] Because the first temperature and the second temperature are temperatures at different positions on the heat-generating body 112, in actual applications, when the heat-generating body 112 is normally working, there may be a difference in temperature at different positions, but the difference will not be too large, and if there is a large difference in temperature at different positions on the heat-generating body 112, for example, the absolute value of the difference between the first temperature and the second temperature is greater than the fourth temperature threshold, it means that the heat-generating body 112 may be damaged, resulting in uneven heating. In this embodiment, by connecting the first temperature sensor 122 and the second temperature sensor 132 to the controller 131, the controller 131 can monitor the temperature at multiple positions on the heat-generating body 112, so as to timely discover the problem of uneven heating of the heat-generating body 112, and when it is determined that the heat-generating body 112 may have the problem of uneven heating, the connection between the heat-generating body 112 and the external power supply 20 is cut off in time by controlling the main contactor 1113 to be disconnected, so as to stop the heat-generating body 112 from working, thereby reducing further damage to the heat-generating body 112.

[0076] In some embodiments, as shown in FIG. 5, in addition to being connected to the electrical switching device 133 through the first output end and being connected to the main contactor 1113 through the second output end, the third output end of the controller 131 can also be connected to the circuit breaker assembly 1112.

[0077] In this embodiment, after the controller 131 controls the main contactor 1113 to be disconnected, the controller 131 continues to acquire the second temperature at the second temperature acquisition point collected by the second temperature sensor 132, and controls the circuit breaker assembly 1112 to be disconnected in the case that the second temperature exceeds the fifth temperature threshold. The fifth temperature threshold can be set according to actual conditions, and the fifth temperature threshold can be the same as or different from the second temperature threshold or the third position threshold.

[0078] In actual applications, the connection between the heat-generating body 112 and the external power supply 20 may not be able to be disconnected through the main contactor 1113 due to reasons such as contact adhesion of the main contactor 1113, resulting in the risk of overheating of the heat-generating body 112 after the controller 131 controls the main contactor 1113 to be disconnected. In this embodiment, by connecting the circuit breaker assembly 1112 to the output end of the controller 131, when the connection between the heat-generating body 112 and the external power supply 20 cannot be disconnected through the main contactor 1113, the controller 131 can still control the circuit breaker assembly 1112 to be disconnected to disconnect the connection between the heat-generating body 112 and the external power supply 20, thereby effectively reducing the occurrence of overheating of the heat-generating body and improving the reliability of the heat sealing head mechanism.

[0079] In some embodiments, as shown in FIG. 6, the circuit breaker assembly 1112 can be a release circuit breaker including a circuit breaker 11121 and a release 11122 mechanically connected to the circuit breaker 11121.

[0080] The second output end of the temperature controller 121 and the third output end of the controller 131 are connected with the tripping device 11122 respectively.

[0081] The controller 131 or the temperature controller 121 controls the tripping device 11122 to trip to disconnect the circuit breaker assembly 1112.

[0082] Here, the tripping device 11122 is set to make the circuit breaker assembly 1112 have the advantages of high sensitivity, accurate action, etc., and is basically not affected by the ambient temperature.

[0083] In some embodiments, the number of second temperature collection points and the number of second temperature sensors 132 can be multiple, and different second temperature sensors 132 are connected with different second temperature collection points, so as to collect the second temperature at multiple second temperature collection points by multiple second temperature sensors 132.

[0084] Correspondingly, in addition to the second temperature sensor 132, the control assembly 13 can also include a temperature collector 134, and the multiple second temperature sensors 132 are connected with the controller 131 through the temperature collector 134.

[0085] The temperature collector 134 converts the second temperature collected by the multiple second temperature sensors 132 into a digital signal and transmits it to the controller 131.

[0086] In this way, by setting multiple second temperature sensors to collect the second temperature, the accuracy of the second temperature can be improved, and by setting the temperature collector 134, the multiple second temperatures collected by the multiple second temperature sensors 132 can be processed and transmitted to the controller 131, so that the controller 131 obtains more accurate second temperature.

[0087] For example, as shown in FIG. 7, the heating body 112 includes one first temperature collection point and two second temperature collection points, the first temperature collection point is located at the middle position of the heating body 112, and the two second temperature collection points are located on both sides of the first temperature collection point. The control assembly 13 includes two second temperature sensors 132, the two second temperature sensors 132 are connected with the two second temperature collection points one by one, the two second temperature sensors 132 are connected with the input end of the temperature collector 134, and the output end of the temperature collector 134 is connected with the controller 131. The temperature collector 134 can simultaneously collect the second temperature collected by the two second temperature sensors 132, process and transmit the two second temperatures to the controller 131.

[0088] In some embodiments, the controller 131 can include a programmable logic controller (PLC), and the controller 131 can include a plurality of PLC remote stations, different PLC remote stations can control different devices or components, for example, the controller 131 can include a first PLC remote station and a second PLC remote station, wherein the first PLC remote station is used to control the electrical switching device 133, and the second PLC controller is used to control the circuit breaker assembly 1112.

[0089] In this way, remote control of the heat sealing head mechanism can be achieved.

[0090] Based on the heat sealing head mechanism provided in the above embodiments, the embodiments of the present application further provide a heat sealing device.

[0091] Referring to FIG. 8, FIG. 8 is a structural schematic view of a heat sealing device according to an embodiment of the present application. As shown in FIG. 8, the heat sealing device includes a first heat sealing head 31 and a second heat sealing head 32 arranged oppositely, and the first heat sealing head 31 and the second heat sealing head 32 each include the heat sealing head mechanism in the above embodiments.

[0092] The first heat sealing head 31 and the second heat sealing head 32 are structures for heating and extruding the aluminum-plastic film, and the structures of the first heat sealing head 31 and the second heat sealing head 32 can be the same or different. In FIG. 3, only the case where the structures of the first heat sealing head 31 and the second heat sealing head 32 are different is taken as an example.

[0093] In actual application, the first heat sealing head 31 and the second heat sealing head 32 in the heat sealing device 30 can move towards each other, so as to extrude and heat the aluminum-plastic film placed between the first heat sealing head 31 and the second heat sealing head 32, thereby realizing heat sealing of the aluminum-plastic film.

[0094] Another embodiment of the present application further provides a processing system, which includes the heat sealing device in the above embodiments. The processing system can be used for producing and processing soft package battery monomers, and the heat sealing device is used for heat sealing the soft package battery monomers in the production and processing process.

[0095] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent substitutions can be made to the components thereof, especially, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heat sealing head mechanism, comprising: a heating assembly comprising a switch module and a heating body, the heating body being connected with an external power source through the switch module; a temperature control assembly comprising a temperature controller and a first temperature sensor connected with an input end of the temperature controller, the first temperature sensor being connected with a first temperature collection point on the heating body, an output end of the temperature controller being connected with the switch module; a control assembly comprising a controller and a second temperature sensor connected with an input end of the controller, the second temperature sensor being connected with a second temperature collection point on the heating body, an output end of the controller being connected with the switch module; wherein the temperature controller acquires a first temperature at the first temperature collection point collected by the first temperature sensor, controls a conduction duration or a disconnection duration of the switch module according to the first temperature, so as to control a working duration or a stop duration of the heating body, and controls the switch module to disconnect the connection between the heating body and the external power source in a case that the first temperature exceeds a first temperature threshold; the controller acquires a second temperature at the second temperature collection point collected by the second temperature sensor, and controls the switch module to disconnect the connection between the heating body and the external power source in a case that the second temperature exceeds a second temperature threshold.

2. The hot head mechanism of claim 1, wherein, the switch module comprises a contactless switch and a circuit breaker assembly; an input end of the contactless switch is connected with the external power source through the circuit breaker assembly, and an output end of the contactless switch is connected with the heating body; a first output end of the temperature controller is connected with a control end of the contactless switch, and a second output end of the temperature controller is connected with the circuit breaker assembly; the control assembly comprises an electrical switching device connected with a first output end of the controller, the electrical switching device being connected in series on a connection line between the first output end of the temperature controller and the control end of the contactless switch; wherein the temperature controller outputs a control instruction to the contactless switch according to the first temperature, so as to control a conduction duration or a disconnection duration of the contactless switch, and the temperature controller outputs a control instruction to the circuit breaker assembly in a case that the first temperature is greater than the first temperature threshold, so as to control the circuit breaker assembly to disconnect, so that the connection between the heating body and the external power source is disconnected; the controller outputs a control instruction to the electrical switching device in a case that the second temperature exceeds the second temperature threshold, so as to control the electrical switching device to disconnect the connection between the contactless switch and the temperature controller, so that the connection between the heating body and the external power source is disconnected.

3. The hot head mechanism of claim 2, wherein, the contactless switch comprises at least one of: a solid state relay, a thyristor.

4. The hot seal head mechanism of claim 2 or 3, wherein, the switch module further comprises a main contactor; the main contactor is arranged between an input end of the contactless switch and the circuit breaker assembly; a second output end of the controller is connected with the main contactor. The controller continues to acquire the second temperature at the second temperature acquisition point collected by the second temperature sensor after controlling the electrical switching device to disconnect the connection between the non-contact switch and the temperature controller, and sends a control instruction to the main contactor to control the main contactor to disconnect when the second temperature exceeds a third temperature threshold.

5. The hot head mechanism of claim 4, wherein, The first temperature sensor is also connected to the input of the controller. The controller sends a control instruction to the main contactor to control the main contactor to disconnect when the difference between the first temperature and the second temperature exceeds a fourth temperature threshold.

6. The heat sealing head mechanism according to claim 4 or 5, wherein The third output of the controller is connected to the circuit breaker assembly. The controller continues to acquire the second temperature at the second temperature acquisition point collected by the second temperature sensor after controlling the main contactor to disconnect, and sends a control instruction to the circuit breaker assembly to control the circuit breaker assembly to disconnect when the second temperature exceeds a fifth temperature threshold. The circuit breaker assembly includes a circuit breaker and a release mechanically connected to the circuit breaker.

7. The hot head mechanism of claim 6, wherein, The second output of the temperature controller and the third output of the controller are respectively connected to the release. The controller or the temperature controller controls the release to release the circuit breaker assembly. The number of second temperature acquisition points and the number of second temperature sensors are both multiple, and different second temperature sensors are connected to different second temperature acquisition points.

8. The hot head mechanism of any of claims 1-7, wherein, The control assembly further includes a temperature collector, and multiple second temperature sensors are connected to the controller through the temperature collector. The temperature collector converts the second temperature collected by multiple second temperature sensors into a digital signal and transmits it to the controller.

9. A heat sealing device comprising oppositely arranged first and second heat sealing heads, and each of the first and second heat sealing heads comprises the heat sealing head mechanism according to any one of claims 1-8.

10. A processing system comprising the heat sealing device according to claim 9. ​

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