Multifunctional AC / DC integrated power supply device

Abstract

The invention is applicable to the technical field of mobile power supply equipment, and relates to a multifunctional alternating current and direct current integrated power supply device, which comprises a charging module, an energy storage module, a power supply module provided with multiple types of power supply interfaces and a device protection module for line protection, the energy storage module is respectively connected with the charging module and the power supply module, and the device protection module is connected with the power supply module. The device protection module comprises a signal comparison unit, a display unit and a control unit which are connected in sequence, the display unit performs early warning indication according to an output signal of the signal comparison unit, and the control unit performs power supply control on the device according to the output signal of the signal comparison unit. Diversified requirements of working equipment with different voltage requirements on power supply interfaces can be met, the compatibility and universality of power supply use are improved, the working efficiency is improved, the power supply device and external equipment can be protected by cutting off in time when power supply is abnormal through the integrated device protection module, and safe and stable operation of the power supply and the equipment is ensured.

Description

Technical Field

[0001] The present invention is applicable to the technical field of mobile power supply equipment, and in particular relates to a multifunctional AC / DC integrated power supply device. Background Art

[0002] The power inverter is a power electronic device that uses modulation technology to control the magnitude and direction of DC voltage to achieve the conversion of DC power into AC power. It can convert the power supply voltage into a three-phase AC voltage output. When performing outdoor tasks in power grid scenarios, a variety of maintenance and construction equipment are usually used. Different equipment corresponds to different voltage requirements and safe power supply requirements, so more requirements are also put forward for outdoor mobile power supplies.

[0003] In this regard, the prior art provided by the application number CN202310178242.9, the invention name of which is a mobile power supply device for outdoor maintenance of a distribution automation switch, provides a technical solution including: a box body, which is used to protect the internal electronic components; a rectifier module, which is used to rectify the external input AC power to form DC power; a storage module, which is charged and stored by the rectifier module; an inverter module, which is used to invert the storage module into AC power output, and the inverter module is divided into multiple output channels through an air switch; a terminal block, which is connected to the output channel and transmits power to the load side and power side of the automation switch. It can be seen that although the air switch is divided into multiple output channels, it is divided into two channels through the air switch, one for powering the power supply side of the automation switch and the other for powering the load side. If multiple outdoor tasks need to be carried out at the same time, due to the single output port on the load side, it is still necessary to carry multiple power supply devices to meet different voltage requirements. For example, in field operations, construction sites or other harsh working environments, it is necessary to use CT transformer comprehensive testers, high-voltage test operation boxes, resistance testers and other testing equipment at the same time. It not only increases the user's carrying burden but also reduces work efficiency. In addition, when the power supply equipment is working in the field, it will inevitably be affected by complex environmental factors such as changeable weather, high temperature and high humidity weather. These external factors are combined with the characteristics of the power supply itself to continuously supply power to various working equipment, which often leads to abnormal phenomena such as overheating and short circuit. If not discovered in time, it may not only damage the power supply equipment itself, but also cause potential safety problems to the working equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the work efficiency is low due to the single mobile power output port required by working equipment with different voltage requirements in outdoor working scenes, and the line safety is low due to environmental factors and the continuous multi-load power supply of the power supply itself. A multifunctional AC / DC integrated power supply device is proposed. The power supply module integrating multiple types of power supply interfaces can ensure that the power supply device provides multiple types of power outputs to the outside, and can meet the diversified requirements of working equipment with different voltage requirements for power supply interfaces when working outdoors, thereby improving the compatibility and versatility of power supply use. In addition, multiple types of power supply interfaces can be provided to power different working equipment at the same time, and multiple devices can work synchronously to improve work efficiency. The device protection module is integrated in the power supply device to ensure that the device has a line protection function, and the parameters such as the electrical signal in the power supply line are monitored in real time through the signal comparison unit. When a line abnormality is detected, the display unit will immediately give an early warning indication based on the output signal of the signal comparison unit so as to take timely measures. At the same time, the control unit will control the power supply of the device according to the output signal of the signal comparison unit, cut off the abnormal line, and prevent the fault from expanding, thereby protecting the safe and stable operation of the entire power supply device.

[0005] In the first aspect, a technical solution provided by the present invention is: a multifunctional AC / DC integrated power supply device, including a charging module and an energy storage module, the device also includes a power supply module provided with multiple types of power supply interfaces for external power supply and a device protection module for line protection of the device, the energy storage module is respectively connected to the charging module and the power supply module, and the device protection module is connected to the power supply module, wherein the device protection module includes a signal comparison unit, a display unit and a control unit, the signal comparison unit is connected to the display unit, the display unit is connected to the control unit, the display unit performs an early warning indication according to the output signal of the signal comparison unit, and the control unit controls the power supply of the device according to the output signal of the signal comparison unit.

[0006] Furthermore, the signal comparison unit includes a first comparison subunit and a second comparison subunit, the input end of the first comparison subunit obtains a first type of comparison signal, the output end of the first comparison subunit is connected to the input end of the display unit, the input end of the second comparison subunit obtains a second type of comparison signal, and the output end of the second comparison subunit is connected to the input end of the display unit.

[0007] Further, the display unit includes a first display subunit, a second display subunit and a third display subunit, the output end of the first comparison subunit is connected to the input end of the first display subunit, the output end of the second comparison subunit is connected to the input end of the second display subunit, the input end of the third display subunit inputs an IGBT overcurrent signal, and the output ends of the first display subunit, the second display subunit and the third display subunit are connected to the first signal input end of the control unit.

[0008] Further, the control unit includes a first resistor, a second resistor and an SR trigger, the first end of the first resistor is connected to the second signal input end of the SR trigger, the second end of the first resistor is grounded, the first end of the second resistor is connected to the first signal input end of the SR trigger, the second end of the second resistor is grounded, the second signal end of the SR trigger inputs a reset signal, the first signal input end inputs an output signal of the first comparison subunit or the second comparison subunit, the output end of the SR trigger makes a judgment based on the signals input by the first signal end and the second signal end, and outputs a power switch on / off control signal.

[0009] Furthermore, the first display subunit includes a first light-emitting diode, the second display subunit includes a second photodiode, and the third display subunit includes a third photodiode. The anode of the first light-emitting diode is connected to the output end of the first comparison subunit, the anode of the second photodiode is connected to the output end of the second comparison subunit, the anode of the third photodiode is connected to the IGBT tube, and the cathodes of the first light-emitting diode, the second photodiode and the third photodiode are connected to the first signal input end of the SR trigger.

[0010] Furthermore, the first type of comparison signal includes an AC output voltage and an AC output current of the power supply module, and the AC output voltage and the AC output current are respectively input through different input terminals of the first comparison subunit.

[0011] Furthermore, the second type of comparison signal includes the line temperature of the device, the AC power failure signal of the power supply module and the DC voltage signal of the power supply module, and the line temperature, AC power failure signal and DC voltage signal are respectively input through different input ends of the second comparison subunit.

[0012] Furthermore, the power supply module includes an AC220V power interface, an AC380V power interface, a DC110V power interface and a DC48V power interface.

[0013] Furthermore, the charging module performs charging by a constant current and constant voltage charging method based on a preset voltage range.

[0014] Furthermore, the device also includes an information display and switching module, which includes a display screen and a plurality of switching control keys, and the display information of the display screen is switched by controlling the switching control keys.

[0015] The beneficial effects achieved by the present invention are as follows: the power supply module integrating multiple types of power supply interfaces can ensure that the power supply device provides multiple types of power outputs to the outside, and can meet the diverse needs of working equipment with different voltage requirements for power supply interfaces when working outside, thereby improving the compatibility and versatility of power supply use, and providing multiple types of power supply interfaces can simultaneously power different working equipment, and simultaneously perform multiple devices work, thereby improving work efficiency; integrating a device protection module in the power supply device can ensure that the device has a line protection function, and real-time monitoring of parameters such as electrical signals in the power supply line is performed through a signal comparison unit. When a line abnormality is detected, the display unit will immediately give a warning indication based on the output signal of the signal comparison unit so that timely measures can be taken. At the same time, the control unit will control the power supply of the device according to the output signal of the signal comparison unit, cut off the abnormal line, and prevent the fault from expanding, thereby protecting the safe and stable operation of the entire power supply device.

[0016] The above invention content is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts.

[0018] Figure 1 It is a schematic diagram of the module structure of a multifunctional AC / DC integrated power supply device provided by an embodiment of the present invention; Figure 2 is a charging circuit diagram of a constant current and constant voltage charging method provided by an embodiment of the present invention; Figure 3 is a circuit diagram of a device protection module provided by an embodiment of the present invention; Among them, 1. charging module, 2. energy storage module, 3. power supply module, 4. device protection module, 41. signal comparison unit, 411. first comparison subunit, 412. second comparison subunit, 42. display unit, 43. control unit. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the drawings; the process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0021] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. It should also be understood that in various embodiments of the present invention, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0022] It should be understood that in the present invention, "plurality" refers to two or more than two. "And / or" is merely a variable relationship that describes associated objects, indicating that three relationships may exist. For example, and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated with each other are in an "or" relationship. "Contains A, B and C", "Contains A, B, C" means that A, B, and C are all included, "Contains A, B or C" means that one of A, B, and C is included, and "Contains A, B and / or C" means that any one, any two, or any three of A, B, and C are included.

[0023] It should be understood that in the present invention, "B corresponding to A", "B corresponding to A", "A corresponds to B" or "B corresponds to A" means that B is associated with A and B can be determined based on A. Determining B based on A does not mean determining B based only on A, but B can also be determined based on A and / or other information. A and B match when the similarity between A and B is greater than or equal to a preset threshold.

[0024] Embodiment 1 Please refer to Figure 1 , Figure 1 It is a schematic diagram of the module structure of a multifunctional AC / DC integrated power supply device provided by an embodiment of the present invention. A multifunctional AC / DC integrated power supply device includes a charging module 1 and an energy storage module 2. The device also includes a power supply module 3 provided with multiple types of power supply interfaces for external power supply and a device protection module 4 for line protection of the device. The energy storage module 2 is connected to the charging module 1 and the power supply module 3 respectively, and the device protection module 4 is connected to the power supply module 3. The device protection module 4 includes a signal comparison unit 41, a display unit 42 and a control unit 43. The signal comparison unit 41 is connected to the display unit 42, and the display unit 42 is connected to the control unit 43. The display unit 42 performs an early warning indication according to the output signal of the signal comparison unit 41, and the control unit 43 controls the power supply of the device according to the output signal of the signal comparison unit 41.

[0025] A multifunctional AC / DC integrated power supply device provided in an embodiment of the present invention is suitable for scenarios where outdoor work needs to provide power for working equipment with different voltage requirements, including but not limited to line inspection and maintenance in distribution networks, substation operation and commissioning, emergency repair and restoration of power grid facilities and equipment, etc.

[0026] Among them, combined Figure 2 As shown, the charging module 1 can be charged by a constant current and constant voltage charging method based on a preset voltage range. In this embodiment, the preset voltage range can be between 2.0V and 5.5V, and of course it can also be other voltage ranges. The charging circuit of the charging module 1 can be charged based on a constant current and constant voltage charging method. The first stage of constant current and constant voltage charging is charged with a constant current; when the voltage reaches a predetermined value, it enters the second stage for constant voltage charging, at which time the current gradually decreases; when the charging current reaches zero, the battery is fully charged. The charging circuit can be controlled by a single-chip microcomputer as a processor.

[0027] Among them, the above-mentioned energy storage module 2 can use lithium batteries, and the lithium batteries used can be selected according to the power of various tools that are often needed to be carried for field work, including determining the battery power of the lithium battery according to the rated power of the loop resistance tester, CT transformer comprehensive tester, multi-frequency induction withstand voltage tester, high-voltage test operation box, PT transformer tester, etc. before determining the lithium battery, so as to provide a stable voltage for various tools to work simultaneously or individually. In this application, the battery power of the lithium battery is set at 48V / 30Ah, 1800W. The charging and use time of the lithium battery provided in this application is shown in Table 1 below: Table 1 Lithium battery charging and use schedule Combined with Table 1 above, the lithium battery provided in this application has a sufficiently long service life and is very stable after multiple tests. The power supply efficiency is basically above 95%, and it can provide a stable power supply voltage for various tools.

[0028] More specifically, for the single-chip microcomputer in the charging module 1, its main frequency processing speed is 32MHz, the program storage is 128kb, and the data storage is 24kb. In order to ensure the performance of the single-chip microcomputer, the single-chip microcomputer is subjected to a response test, divided into 6 groups and tested for stability 20 times respectively, and the average response speed of each group is calculated as shown in Table 2 below: Table 2 MCU response speed test table Serial number Response speed / ms Serial number Response speed / ms 1 9.2 4 10.0 2 9.9 5 8.9 3 8.8 6 9.5 As shown in Table 2 above, the response speeds of the six tests are all less than or equal to 10ms, which means that the response speed of the microcontroller is fast.

[0029] More specifically, as shown in Table 3, before charging by the constant current and constant voltage charging method, the charging voltage stability was tested 20 times in 10 groups, and the voltage stability of the charging process was analyzed by calculating the average error of each group. Through multiple test results analysis, it can be seen that the average error of the voltage stability of the constant current and constant voltage charging method is 1.02, that is, the voltage stability rate is basically 2%, which meets the preset voltage range of 5V. Therefore, the charging module 1 provided in this embodiment is charged by the constant current and constant voltage charging method, and the voltage stability during the charging process is high. Table 3 Charging voltage stability test table Group stability Group stability 1 2％ 6 2.1％ 2 1.8％ 7 2％ 3 2.1％ 8 1.9％ 4 2％ 9 2.2％ 5 2.2％ 10 2.1％

[0030] More specifically, the types of power interfaces in the power supply module 3 including multiple types of power interfaces can be determined by collecting the types of power sources required in various engineering works. Considering that the line voltage from the power grid to the user is 380V, a large number of test instruments use 220V AC power, 10kV circuit breaker unlocking and DC 110V required as emergency DC power supply, and DC 48V as emergency power supply for distribution automation, the power supply device provided in this embodiment includes AC220V power interface, AC380V power interface, DC110V power interface and DC48V power interface. Among them, considering the rated output power of the power supply device and the large number of test instruments, 4 AC 220V output ports can be set.

[0031] More specifically, the power supply module 3 also includes a DC-AC inverter, which is a device for converting a DC voltage (or current) into an AC voltage (or current). The DC-AC inverter first receives input from a DC power supply, that is, charges the power supply device, and then adjusts and controls the input DC power to ensure that its voltage and frequency meet the requirements of AC power, and converts the adjusted DC power into AC power through the inverter circuit. Finally, the output AC power needs to be filtered to eliminate noise and harmonics to ensure the stability of current and voltage. Among them, the inverter circuit is usually composed of a group of transistors or field effect transistors. As a possible implementation method, the DC-AC inverter can use a pure sine wave inverter. The pure sine wave inverter uses SPWM technology, and its output waveform is a complete sine wave with low distortion, low noise, complete protection functions, high overall efficiency, and a pure sine wave inverter has multiple protection functions such as overvoltage protection, undervoltage protection, overload protection, overheating protection, short circuit protection, and reverse connection protection, thereby ensuring the stable operation of the system. In this embodiment, after testing, the power supply module 3 using a pure sine wave inverter has an average conversion efficiency between 97.1% and 98.2%. More specifically, the power supply module 3 also includes a DC-DC converter, which can be a switching regulated power supply converter. After testing, the conversion efficiency of the power supply voltage converter is ≥95%. It should be noted that the charging module 1 and the power supply module 3 can both include a rectifier circuit to achieve rectification to output a stable voltage.

[0032] Combination Figure 3As shown, in order to protect the device during the power supply process, a device protection module 4 is also provided in the power supply device. The device protection module 4 is connected to the output end of the power supply module 3, and is used to collect the output voltage or output current of the power supply module 3, and is used to detect whether the output voltage or output current of the power supply module 3 exceeds the threshold. Among them, the signal comparison unit 41 in the device protection module 4 is used to compare the acquired voltage, current, and temperature, and generate an output signal through comparison. The output signal can be represented in binary form, for example: the output is 0, indicating that the collected line voltage, current or temperature does not exceed the set threshold; the output is 1, indicating that the line voltage, current or temperature exceeds the corresponding set threshold. The above-mentioned display unit 42 can be lit or not according to the output value of the output signal of the signal comparison unit 41. Based on the display unit 42, the specific situation of the current judgment and detection item can be timely understood. The output signal generated by the signal comparison unit 41 will be transmitted to the control unit 43 after passing through the display unit 42. The control unit 43 can control the output result according to the received signal. The output end of the control unit 43 can be connected to a control switch. When the control result output by the control unit 43 is to cut off the power supply, the control switch can automatically cut off the power supply according to the output result of the control unit 43, thereby realizing power supply protection of the power supply device, and also realizing protection of the working equipment.

[0033] In an embodiment of the present invention, multiple types of output ports are provided in the power supply device based on scene requirements, which is conducive to powering devices with different voltage requirements simultaneously or separately. By providing output ports that meet multiple voltage requirements, not only can the equipment carried when going out be reduced, but also devices with different voltage requirements can be powered at the same time, and synchronous work can be enabled, which is conducive to improving work efficiency. By setting up a device protection module 4 to protect the power supply process, not only can the comparison result be quickly obtained through the display unit 42 to achieve early warning indication, but also the control unit 43 can control the power supply according to the output signal of the signal comparison unit 41, so that in the case of abnormal power supply, the power switch can be cut off in time to protect the device and external equipment and avoid damage.

[0034] Optionally, combined Figure 3 As shown, the signal comparison unit 41 includes a first comparison subunit 411 and a second comparison subunit 412. The input end of the first comparison subunit 411 obtains a first type of comparison signal, and the output end of the first comparison subunit 411 is connected to the input end of the display unit 42. The input end of the second comparison subunit 412 obtains a second type of comparison signal, and the output end of the second comparison subunit 412 is connected to the input end of the display unit 42.

[0035] Specifically, in the process of power supply through the power supply module 3, in order to ensure the safety and stability of power supply, it is necessary to monitor various parameters in the power supply process, so as to promptly discover and control abnormal conditions that occur during the power supply process, among which abnormal conditions include AC output overvoltage, AC output undervoltage, AC output overcurrent, line overtemperature, AC power loss, DC overvoltage, etc.

[0036] More specifically, the first type of comparison signal includes the AC output voltage and the AC output current of the power supply module 3, and the AC output voltage and the AC output current are respectively input through different input terminals of the first comparison subunit 411. The second type of comparison signal includes the line temperature of the device, the AC power failure signal of the power supply module 3 and the DC voltage signal of the power supply module 3, and the line temperature, the AC power failure signal and the DC voltage signal are respectively input through different input terminals of the second comparison subunit 412. As a possible implementation, the input terminals corresponding to the voltage comparison in the first comparison subunit 411 and the second comparison subunit 412 can be connected to the voltage output terminal of the power supply module 3 to collect the output voltage; the current can be converted into the output current by an ammeter or by connecting a resistor of a corresponding size in series to the voltage output terminal of the power supply module 3; the temperature can be converted by connecting a temperature sensor in series to the input terminal corresponding to the temperature detection, and the temperature sensor includes but is not limited to a thermistor, a thermocouple, a thermal resistor, etc.

[0037] More specifically, the first comparison subunit 411 may be integrated with a voltage comparator, a current comparator, etc. The first comparison subunit 411 may be used to perform AC output overvoltage detection, AC output overcurrent detection, and AC output undervoltage detection. When the voltage comparator in the first comparison subunit 411 collects the AC output voltage, the AC output voltage may be compared with the set AC output voltage threshold range. If it does not meet the AC output voltage threshold range, it indicates that the AC voltage output is overvoltage or undervoltage, and a high-level signal is generated accordingly. The high-level signal is input into the display unit 42 and the control unit 43 through the output end of the first comparison subunit 411 to perform corresponding actions respectively; if it meets the AC output voltage threshold range, it indicates that the AC output voltage is not overvoltage or undervoltage, and a low-level signal is generated accordingly, and the power supply is normal in this case. Similarly, if the output current is detected, the AC output current can be compared with the set AC output current threshold range. If it does not meet the AC output current threshold range, it means that the AC output current is overcurrent, and a high-level signal is generated accordingly. The high-level signal is input into the display unit 42 and the control unit 43 through the output end of the first comparison subunit 411 to perform corresponding actions respectively; if it meets the AC output current threshold range, it means that the AC output current is not overcurrent, and a low-level signal is generated accordingly. In this case, power supply is normal.

[0038] The second comparison subunit 412 can also be integrated with a voltage comparator, a current comparator, a temperature comparator, etc. The second comparison subunit 412 can be used to detect over-temperature, AC power failure, and DC over-voltage of the circuit of the power supply module 3. When the voltage comparator in the second comparison subunit 412 collects the DC output voltage of the power supply module 3, the DC output voltage can be compared with the set DC output voltage threshold. If it exceeds the DC output voltage threshold, it means that the DC voltage output is over-voltage, and a high-level signal is generated accordingly. The high-level signal is input into the display unit 42 and the control unit 43 through the output end of the second comparison subunit 412 to perform corresponding actions respectively; if it is lower than the DC output voltage threshold range, it means that the DC output voltage is not over-voltage, and a low-level signal is generated accordingly, and the power supply is normal in this case. Similarly, when the voltage comparator in the second comparison subunit 412 performs AC power failure detection, if it is determined that the AC power supply voltage of the power supply module 3 is 0V or very small, it means that the AC power is lost, and a high-level signal can be output accordingly. Similarly, for the temperature comparator, the collected temperature value can be compared with the set temperature range to determine whether it is working within the temperature safety operating range. If it does not meet the temperature safety operating range, a high-level signal is output, and if it meets the temperature safety operating range, a low-level signal is output.

[0039] It should be noted that, since the first comparison subunit 411 and the second comparison subunit 412 can respectively perform multiple detection functions, the first comparison subunit 411 and the second comparison subunit 412 can be represented by an OR gate, that is, the first comparison subunit 411 includes multiple comparators, and the AC output voltage overvoltage, overcurrent or undervoltage detection can be synchronously performed by the corresponding comparators. In the synchronous AC output voltage overvoltage, overcurrent or undervoltage detection, as long as any one of them does not meet the corresponding set threshold range or threshold, the output signal is a high-level signal. Similarly, the second comparison subunit 412 also includes multiple comparators, and the line overtemperature detection, AC power failure detection, and DC overvoltage detection can also be synchronously performed by the corresponding comparators. In the synchronous line overtemperature detection, AC power failure detection, and DC overvoltage detection, as long as any one of them does not meet the corresponding set threshold range or threshold, the output signal of the second comparison subunit 412 is a high-level signal.

[0040] In the embodiment of the present invention, a first comparison subunit 411 and a second comparison subunit 412 are respectively provided, and different types of tests are performed on the power supply module 3 through the first comparison subunit 411 and the second comparison subunit 412, and the first comparison subunit 411 and the second comparison subunit 412 can synchronously perform multiple types of device protection tests to realize overload, overheating, overvoltage / undervoltage and other detection of the power supply module 3 line, and timely and accurately control the switching state of the power supply module 3, which is conducive to ensuring the safety and stability of power supply.

[0041] Optionally, combined Figure 3 As shown, the display unit 42 includes a first display subunit, a second display subunit and a third display subunit, the output end of the first comparison subunit 411 is connected to the input end of the first display subunit, the output end of the second comparison subunit 412 is connected to the input end of the second display subunit, the input end of the third display subunit inputs an IGBT overcurrent signal, and the output ends of the first display subunit, the second display subunit and the third display subunit are connected to the first signal input end of the control unit 43.

[0042] Specifically, the first display subunit, the second display subunit and the third display subunit respectively include light-emitting diodes, the light-emitting diode of the first display subunit is D1, the light-emitting diode of the second display subunit is D2, and the light-emitting diode of the third display subunit is D3. The positive electrode of the light-emitting diode D1 receives the output signal of the first comparison subunit 411, and can make an early warning indication or no display according to the output signal, for example: the output signal is 1, the light-emitting diode D1 is lit, and a warning indication is made; the output signal is 0, the light-emitting diode D1 is not lit, and the power supply module 3 is powered normally. The positive electrode of the light-emitting diode D2 is connected to the output end of the second comparison subunit 412, and the display is made or not according to the output signal of the second comparison subunit 412. The positive electrode of the light-emitting diode D3 is used to access the IGBT overcurrent signal of the IGBT tube (insulated gate bipolar transistor) of the inverter in the power supply module 3, and indicate the overcurrent state of the IGBT tube based on the IGBT overcurrent signal. The cathodes of the light-emitting diodes D1, D2, and D3 are all connected to the first signal input terminal of the control unit 43, and are used to input the output signal of the first comparison unit or the second comparison unit into the control unit 43, so that the control unit 43 generates a control signal for controlling the power switch according to the received signal. When it is determined that the line has overvoltage, overcurrent, undervoltage, overtemperature, loss of pressure, etc., the switch is promptly controlled to cut off the power supply, thereby protecting the power supply device and external working equipment and avoiding damage, thereby improving the power supply reliability of the power supply device.

[0043] Optionally, the control unit 43 includes a first resistor, a second resistor and an SR trigger, the first end of the first resistor is connected to the second signal input end of the SR trigger, the second end of the first resistor is grounded, the first end of the second resistor is connected to the first signal input end of the SR trigger, the second end of the second resistor is grounded, the second signal end of the SR trigger inputs a reset signal, the first signal input end inputs an output signal of the first comparison subunit 411 or the second comparison subunit 412, the output end of the SR trigger makes a judgment based on the signals input by the first signal end and the second signal end, and outputs a power switch on / off control signal.

[0044] Combination Figure 3As shown, the first resistor is R1, the second resistor is R2, the first signal input terminal of the SR trigger is S terminal, the second signal input terminal is R terminal, and the output terminal is Q terminal. In this embodiment, the S terminal is used to receive the output signal of the first comparison subunit 411 or the second comparison subunit 412, and the R terminal is used to input the reset signal. When both the S terminal and the R terminal are low level, the SR trigger is in a stable state, and the output result of the output terminal Q will not change. At this time, the power supply is normal; when the input of either the S terminal or the R terminal is a high level signal, the SR trigger will respond and generate an output. If the S terminal is a high level signal and the R terminal is a low level, the Q terminal outputs a high level signal, the power switch is disconnected, and the power supply is cut off (STOP), and the protection function is executed; if the S terminal is a low level and the R terminal is a high level signal, the Q terminal outputs a low level and performs a reset action. Among them, a first resistor R1 is connected to the ground at the R end, and a second resistor R2 is connected to the ground at the S end. The first resistor R1 and the second resistor R2 are used as pull-down resistors to ensure that the S end and the R end of the SR trigger are always 0 when the power switch is located between the two power storages, which is used to eliminate the bounce of the mechanical switch. Among them, when different types of monitoring are performed simultaneously by the first comparison unit and the second comparison unit, the SR trigger will make judgments on the input signals in sequence according to the timing of the signal received by the S end.

[0045] In the embodiment of the present invention, by using the SR trigger as the controller of the power switch, not only is the structure simple and easy to implement, but the SR trigger also has a memory function and can store code information, which is more suitable for the use scenario of controlling the on and off of the power switch. When the input signal at the S end and the R end disappears, the trigger will maintain the state before the signal disappears, thereby ensuring the stability and reliability of the power switch. Secondly, the SR trigger has two stable states, which can be flipped from one stable state to another stable state under the trigger of an external signal, which is conducive to flexibly controlling the on and off of the power switch as needed and realizing precise control of the switch.

[0046] Optionally, the device further includes an information display and switching module, which includes a display screen and a plurality of switching control keys, and the display information of the display screen is switched by controlling the switching control keys.

[0047] Specifically, an information display and switching module can be set in the device, and various information can be displayed on the display screen, so that the staff can obtain various status information of the device at any time, and the display content on the display screen can be switched by switching control keys. Of course, the display screen can be an LCD touch screen to achieve touch control.

[0048] It should be noted that a multifunctional AC / DC integrated power supply device includes a box, and each module is built into the box and protected by the box. As a possible implementation, multiple universal wheels can be evenly arranged at the bottom of the box to facilitate dragging and labor saving during outdoor work, for example, a universal wheel is arranged at each of the four corner points at the bottom of the box.

[0049] In the embodiment of the present invention, by integrating the charging module 1 and the energy storage module 2, the storage and replenishment of electric energy are realized, and the stable supply of power is ensured. Whether it is direct current or alternating current, it can be efficiently converted and stored to meet the power requirements of different devices, and the flexibility and convenience of power use are improved. The power supply module 3 with multiple types of power supply interfaces can ensure that the power supply device provides multiple types of power output to the outside, and can meet the diverse needs of different working devices for power supply interfaces when working outside; and multiple types of output ports are provided in the power supply device based on scene requirements, which is conducive to powering devices with different voltage requirements at the same time or separately, which not only reduces the trouble of users needing to carry multiple different power adapters, improves the compatibility and versatility of power use, and simultaneously powers devices with different voltage requirements, starts synchronous work, and is conducive to improving work efficiency. The setting of the device protection module 4 can ensure that the device has a powerful line protection function. The current, voltage and other parameters in the power supply line are monitored in real time through the signal comparison unit 41. When overload, overheating, overvoltage / undervoltage and other conditions are found, the display unit 42 will immediately give a warning indication to remind the user to take timely measures. At the same time, the control unit 43 will control the power supply of the device according to the output signal of the signal comparison unit 41, cut off the abnormal line, prevent the fault from expanding, thereby protecting the safe and stable operation of the entire power supply device.

[0050] The specific implementation described above is a preferred implementation of a multifunctional AC / DC integrated power supply device of the present invention, and is not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation. All equivalent changes made in accordance with the shape and structure of the present invention are within the protection scope of the present invention.

Claims

1. A multifunctional AC / DC integrated power supply device, comprising a charging module and an energy storage module, characterized in that: The device also includes a power supply module provided with multiple types of power supply interfaces for external power supply and a device protection module for line protection of the device. The energy storage module is respectively connected to the charging module and the power supply module, and the device protection module is connected to the power supply module. The device protection module includes a signal comparison unit, a display unit and a control unit. The signal comparison unit is connected to the display unit, and the display unit is connected to the control unit. The display unit performs an early warning indication according to the output signal of the signal comparison unit, and the control unit controls the power supply of the device according to the output signal of the signal comparison unit.

2. A multifunctional AC / DC integrated power supply device as claimed in claim 1, characterized in that: The signal comparison unit includes a first comparison subunit and a second comparison subunit. The input end of the first comparison subunit obtains a first type of comparison signal, and the output end of the first comparison subunit is connected to the input end of the display unit. The input end of the second comparison subunit obtains a second type of comparison signal, and the output end of the second comparison subunit is connected to the input end of the display unit.

3. A multifunctional AC / DC integrated power supply device as claimed in claim 2, characterized in that: The display unit includes a first display subunit, a second display subunit and a third display subunit, the output end of the first comparison subunit is connected to the input end of the first display subunit, the output end of the second comparison subunit is connected to the input end of the second display subunit, the input end of the third display subunit inputs an IGBT overcurrent signal, and the output ends of the first display subunit, the second display subunit and the third display subunit are connected to the first signal input end of the control unit.

4. A multifunctional AC / DC integrated power supply device as claimed in claim 3, characterized in that: The control unit includes a first resistor, a second resistor and an SR trigger, the first end of the first resistor is connected to the second signal input end of the SR trigger, the second end of the first resistor is grounded, the first end of the second resistor is connected to the first signal input end of the SR trigger, the second end of the second resistor is grounded, the second signal end of the SR trigger inputs a reset signal, the first signal input end inputs an output signal of the first comparison subunit or the second comparison subunit, the output end of the SR trigger makes a judgment based on the signals input by the first signal end and the second signal end, and outputs a power switch on / off control signal.

5. A multifunctional AC / DC integrated power supply device as claimed in claim 4, characterized in that: The first display subunit includes a first light-emitting diode, the second display subunit includes a second photodiode, and the third display subunit includes a third photodiode. The anode of the first light-emitting diode is connected to the output end of the first comparison subunit, the anode of the second photodiode is connected to the output end of the second comparison subunit, the anode of the third photodiode is connected to the IGBT tube, and the cathodes of the first light-emitting diode, the second photodiode and the third photodiode are connected to the first signal input end of the SR trigger.

6. A multifunctional AC / DC integrated power supply device as claimed in claim 2, characterized in that: The first type of comparison signal includes an AC output voltage and an AC output current of the power supply module, and the AC output voltage and the AC output current are respectively input through different input terminals of the first comparison subunit.

7. A multifunctional AC / DC integrated power supply device as claimed in claim 2, characterized in that: The second type of comparison signal includes the line temperature of the device, the AC power failure signal of the power supply module and the DC voltage signal of the power supply module. The line temperature, AC power failure signal and DC voltage signal are respectively input through different input ends of the second comparison subunit.

8. A multifunctional AC / DC integrated power supply device as claimed in claim 1, characterized in that: The power supply module includes an AC220V power interface, an AC380V power interface, a DC110V power interface and a DC48V power interface.

9. A multifunctional AC / DC integrated power supply device as claimed in claim 1, characterized in that: The charging module performs charging by a constant current and constant voltage charging method based on a preset voltage range.

10. A multifunctional AC / DC integrated power supply device as claimed in any one of claims 1 to 9, characterized in that: The device also includes an information display and switching module, which includes a display screen and a plurality of switching control keys, and the display information of the display screen is switched by controlling the switching control keys.

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