An elevator emergency rescue device charging protection system

Abstract

The utility model relates to an elevator emergency rescue device charging protection system, it includes: switch control module is used for realizing charge -discharge switching and protection switching, simultaneously under abnormal working condition, receives MCU control module and points to break switch control module, cuts off the connection of battery and load, protects the battery, current detection module is used for realizing charging current, discharge current two -way detection, MCU control module is used for each module detection signal, judges the working condition according to preset threshold value, battery module is used for storing electric energy, provides +12V rescue power supply for load module under non mains mode and provides electric energy for rescue module, rescue module is used for under no mains state, to the battery voltage is boosted, wherein, switch control module input terminal series connection external power supply and elevator system +12V load, switch control module output end one way connects battery module. According to the elevator emergency rescue device charging protection system of the utility model, remove the redundant circuit, and the installation size is small.

Description

Technical Field

[0001] This utility model relates to the field of elevator emergency rescue technology, and more specifically, to a charging protection system for an elevator emergency rescue device. Background Technology

[0002] like Figures 3a-3b As shown, the circuit architecture of a traditional elevator emergency rescue device integrates a charging circuit module, a rescue circuit module, a switch module, a current detection module, a battery module, and an MCU control module. It also has two operating modes: mains power mode and non-mains power mode. In mains power mode: K1 is closed and K2 is open, charging the battery through the charging circuit module. When the battery is fully charged, K1 is closed. In non-mains power mode: K1 is open and K2 is closed, and the charging circuit does not operate. The battery module provides +12V power to loads (intercoms, emergency lights, etc.).

[0003] As shown in the block diagram of a traditional elevator rescue device, the device mainly consists of a charging circuit module and a rescue circuit module. When operating in mains power mode and with switch module K1 closed (mains charging mode), the battery current and load current are detected separately. This results in redundant design and a large installation size. However, if the charging module circuit of the emergency rescue device in the current solution shown in Figure 3 is simply removed, leaving only the rescue module circuit (i.e., removing K1 from the switch module, the load current detection part of the current detection module, and the charging circuit module), the external elevator +12V power supply is connected in series with the battery terminal through switch module K2. When rescue device K2 is closed (rescue device in charging mode), if the elevator system +12V load experiences an overload or short circuit, the original elevator system's load current loop will have two current flow branches (with the battery and the elevator system +12V power supply jointly powering the load). This will inevitably reduce the elevator system +12V power supply response protection speed, and may even prevent the original system's +12V fault protection from being triggered.

[0004] Therefore, there is an urgent need to develop a brand-new elevator emergency rescue device charging protection system that can reduce the system load, reduce the installation size, and realize the charging protection function of the elevator emergency rescue device. Summary of the Invention

[0005] The technical problem this invention aims to solve is the redundant design and large installation size of existing elevator emergency rescue devices.

[0006] To solve the above-mentioned technical problems, this utility model provides a charging protection system for an elevator emergency rescue device, comprising: a switch control module for realizing charging / discharging switching and protection switching, wherein the switch control module closes to enter charging mode when the power level is below a limit or the battery voltage is below a limit; simultaneously, under abnormal operating conditions, the switch control module is disconnected upon receiving a command from the MCU control module, cutting off the connection between the battery and the load to protect the battery; a current detection module for realizing bidirectional detection of charging current and discharging current; wherein a reference level offset unit sets a reference point, and a value above the reference point is determined to indicate battery charging (current flowing out of battery point A), and a value below the reference point is determined to indicate battery discharging (current flowing into point A); when the load voltage is too low, the detection circuit shuts down due to insufficient power supply and outputs a zero voltage signal to the MCU control module; the MCU control module... The system is used to detect signals from each module and determine the operating condition based on preset thresholds. During medium and weak overloads, it controls the switching control module by comparing the load voltage with the battery voltage. During short circuits or severe overloads, it receives a zero-voltage signal from the current detection module, triggers an interrupt, and immediately outputs a command to disconnect the switching control module. The battery module stores electrical energy and provides +12V emergency power to the load module and the emergency module in non-mains power mode. It also feeds back the battery voltage to the MCU control module through a voltage detection unit. The emergency module boosts the battery voltage to provide power to the emergency load in the absence of mains power. The switching control module has input and output terminals. The input terminal is connected in series with an external power supply and the elevator system's +12V load, while one output terminal is connected to the battery module.

[0007] According to an embodiment of this utility model, the current detection module may have two current sampling circuits, one for sampling the current between the battery module and the switch control module, and the other for sampling the total current of the load module. Both circuits are completed by the same sampling circuit. In addition, the power supply terminal of the current detection module is connected to the +12V load output terminal; the signal output terminal is connected to the MCU control module.

[0008] According to an embodiment of the present invention, the MCU control module may include a signal input terminal and a control output terminal, wherein the signal input terminal of the MCU control module is connected to the output terminal of the current detection module, the output terminal of the battery voltage detection unit, and the output terminal of the load voltage detection unit; the control output terminal is connected to the output terminal of the switch control module and the output terminal of the rescue module.

[0009] According to an embodiment of the present invention, the battery module may have an input terminal and an output terminal. The input terminal of the battery module is connected to the output terminal of the switch control module to form a mains power charging mode. The output terminal of the battery module is connected to the rescue module and is also connected to the current sampling terminal of the current detection module.

[0010] According to an embodiment of the present invention, the rescue module may have an input terminal and an output terminal, wherein the input terminal of the rescue module is connected to the output terminal of the battery module, and the output terminal of the rescue module is connected to the rescue load.

[0011] According to an embodiment of this utility model, the input control terminal of the rescue module can be started or stopped by the MCU control module.

[0012] According to the embodiments of this utility model, the specifications of the switch control module can conform to GB / T 14714-2008.

[0013] According to an embodiment of this utility model, the model of the MCU control module is EBK1002B; wherein the control chip is an STM32F030 type.

[0014] According to an embodiment of this utility model, the battery module can be a 12V / 7AH lead-acid battery.

[0015] According to an embodiment of this utility model, the battery module can also be selected as a 12V / 9AH lead-acid battery.

[0016] Compared with the prior art, the technical solution provided by the embodiments of this utility model can achieve at least the following beneficial effects:

[0017] According to the elevator emergency rescue device charging protection system of this utility model, a brand-new connection method is realized. The system's +12V power supply is used as the power supply for the battery detection circuit, which can reduce the extreme situation of instantaneous over-discharge of the battery due to instantaneous low output voltage. By closing K1, the voltage difference between the system's +12V and the battery can be detected simultaneously to determine whether the switch control module is stuck. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0019] Figures 1a-1b This is a schematic diagram of the charging protection system of the elevator emergency rescue device according to the present invention;

[0020] Figure 2 This illustrates the weak overload condition handling process in the charging mode of the elevator emergency rescue device according to this utility model.

[0021] Figures 3a-3b This is a schematic diagram of the connection method of elevator emergency rescue device in existing technology. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0024] Figures 1a-1b This is a schematic diagram of the charging protection system of the elevator emergency rescue device according to the present invention.

[0025] like Figures 1a-1b As shown, the elevator emergency rescue device charging protection system includes: a switch control module, a current detection module, an MCU control module, a battery module, and a rescue module.

[0026] The switch control module is used to realize charging and discharging switching and protection switching. When the power is lower than the limit or the battery voltage is lower than the limit, the switch control module closes to enter the charging mode. At the same time, under abnormal operating conditions, the switch control module is disconnected from the load by receiving the instruction from the MCU control module, thus protecting the battery.

[0027] The current detection module is used to realize bidirectional detection of charging current and discharging current; the reference level offset unit sets a reference point. When the value is higher than the reference point, it is determined that the battery is charging (current flows out of the battery at point A), and when the value is lower than the reference point, it is determined that the battery is discharging (current flows into point A); when the load voltage is too low, the detection circuit shuts down due to insufficient power supply and outputs a zero voltage signal to the MCU control module.

[0028] The MCU control module is used to detect signals from each module and determine the operating conditions based on preset thresholds. During medium and weak overloads, it controls the switching control module to turn on or off by comparing the load voltage with the battery voltage. During short circuits or severe overloads, it receives a zero-voltage signal from the current detection module, triggers an interrupt, and immediately outputs a command to disconnect the switching control module.

[0029] The battery module is used to store electrical energy, providing +12V emergency power to the load module and power to the emergency module in non-mains power mode; and feeding back the battery terminal voltage to the MCU control module through the voltage detection unit.

[0030] The rescue module is used to boost the battery voltage in the absence of mains power, so as to provide power to the rescue load.

[0031] The switch control module has an input terminal and an output terminal. The input terminal of the switch control module is connected in series with the external power supply and the +12V load of the elevator system, and one output terminal of the switch control module is connected to the battery module.

[0032] According to one or more embodiments of the present invention, the current detection module has two current sampling circuits, one for sampling the current between the battery module and the switch control module, and the other for sampling the total current of the load module. Both circuits are completed by the same sampling circuit. In addition, the power supply terminal of the current detection module is connected to the +12V load output terminal; the signal output terminal is connected to the MCU control module.

[0033] According to one or more embodiments of the present invention, the MCU control module has a signal input terminal and a control output terminal, wherein the MCU control module signal input terminal is connected to the output terminal of the current detection module, the output terminal of the battery voltage detection unit, and the output terminal of the load voltage detection unit; the control output terminal is connected to the output terminal of the switch control module and the output terminal of the rescue module.

[0034] According to one or more embodiments of the present invention, the battery module has an input terminal and an output terminal. The input terminal of the battery module is connected to the output terminal of the switch control module to form a mains power mode charging. The output terminal of the battery module is connected to the rescue module and is also connected to the current sampling terminal of the current detection module.

[0035] According to one or more embodiments of the present invention, the rescue module has an input terminal and an output terminal, wherein the input terminal of the rescue module is connected to the output terminal of the battery module, and the output terminal of the rescue module is connected to the rescue load.

[0036] According to one or more embodiments of this utility model, the rescue module input control terminal is started or stopped by the MCU control module.

[0037] According to one or more embodiments of this utility model, the specifications of the switch control module conform to GB / T 14714-2008.

[0038] According to one or more embodiments of this utility model, the model of the MCU control module is EBK1002B; wherein the control chip is an STM32F030 type.

[0039] According to one or more embodiments of the present invention, the battery module is a 12V / 7AH lead-acid battery.

[0040] According to one or more embodiments of the present invention, the battery module may be selected as a 12V / 9AH lead-acid battery.

[0041] According to the elevator emergency rescue device charging protection system of this utility model, a brand-new connection method is realized. The system's +12V power supply is used as the power supply for the battery detection circuit, which can reduce the extreme situation of instantaneous over-discharge of the battery due to instantaneous low output voltage. By closing K1, the voltage difference between the system's +12V and the battery can be detected simultaneously to determine whether the switch control module is stuck.

[0042] Depend on Figure 1b and Figure 3b As can be seen from the comparison, this utility model eliminates the +12V circuit, reducing the system load, redundancy, and installation size.

[0043] Figure 2 This illustrates the weak overload handling process in the charging mode of the elevator emergency rescue device according to this utility model.

[0044] like Figure 2 As shown, in order to quickly determine the current system load voltage +12V overload / short circuit faults when K1 is closed (when the battery is charging), during use.

[0045] The current detection circuit needs to offset the detection reference point by a certain level (described in the circuit below). A level higher than this indicates the battery is charging (current flows out of point A), while a level lower indicates the battery is discharging (current flows into point A), thus enabling charge / discharge status determination. The following logic is used for logic protection via the MCU module.

[0046] Mains power mode operation: K1 is closed, and the elevator +12V power supply external power supply charges the battery module through K1; the current detection module samples the current in real time. If the detected value is higher than the reference point, it is determined that the battery is in the charging state. The MCU control module continuously monitors the battery current. When the charging current is lower than the threshold, it means that the battery is fully charged. The MCU sends an output command to disconnect K1.

[0047] Handling of weak overload conditions: When the load voltage drops due to overload, and the load voltage is slightly lower than the battery voltage, the bidirectional current detection module detects that the current is lower than the reference (determining that the battery is discharging), and the MCU immediately controls K1 to disconnect; after the MCU detects that "load voltage ≥ battery voltage + 0.3V" and stabilizes for 5 seconds, K1 is closed again to resume charging.

[0048] Short circuit / severe overload handling: If a short circuit occurs in the load module, the load voltage drops rapidly. The current detection module shuts down because the supply voltage is lower than the operating threshold and outputs a zero voltage signal. Since the zero voltage signal represents the maximum current, this state directly triggers the interrupt program without additional logic judgment. It immediately outputs a command to disconnect K1, cuts off the connection between the battery and the load, and avoids instantaneous over-discharge of the battery.

[0049] Non-mains power operation: With K1 closed, the battery module provides +12V to the load module and power to the rescue module through K1. The current detection module continuously monitors the battery discharge current and implements overcurrent protection for the rescue module.

[0050] K1 Adhesion Detection: Since there will inevitably be a voltage difference after the +12V load voltage of the elevator system is disconnected from the battery voltage, if the sampling unit detects that the voltage difference between the K1 input and output is lower than the threshold within a specified time after the MCU control module outputs the K1 disconnect command, it is determined that the current relay is still in the conducting state (adhesion fault), and an alarm protection is immediately triggered.

[0051] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. A charging protection system for an elevator emergency rescue device, characterized in that, include: The switch control module is used to realize charging / discharging switching and protection switching. When the power level or battery voltage is lower than the limit, the switch control module is closed to enter charging mode. At the same time, under abnormal operating conditions, the switch control module is disconnected upon receiving a command from the MCU control module to cut off the connection between the battery and the load and protect the battery. The current detection module is used to realize bidirectional detection of charging current and discharging current; the reference level offset unit sets a reference point, and the battery is determined to be charging when the current is higher than the reference point and to be discharging when the current is lower than the reference point; when the load voltage is too low, the detection circuit shuts down due to insufficient power supply and outputs a zero voltage signal to the MCU control module. The MCU control module is used to detect signals from each module and determine the operating conditions based on preset thresholds. During medium and weak overloads, it controls the switching control module to turn on or off by comparing the load voltage with the battery voltage. During short circuits or severe overloads, it receives a zero-voltage signal from the current detection module, triggers an interrupt, and immediately outputs a command to disconnect the switching control module. The battery module stores electrical energy, provides +12V emergency power to the load module and power to the emergency module in non-mains power mode, and feeds back the battery terminal voltage to the MCU control module through the voltage detection unit; The rescue module is used to boost the battery voltage in the absence of mains power, providing power to the rescue load. The switch control module has an input terminal and an output terminal. The input terminal of the switch control module is connected in series with the external power supply and the +12V load of the elevator system, and one output terminal of the switch control module is connected to the battery module.

2. The elevator emergency rescue device charging protection system as described in claim 1, characterized in that, The current detection module has two current sampling circuits: one for sampling the current between the battery module and the switch control module, and the other for sampling the total current of the load module. Both circuits are completed by the same sampling circuit. In addition, the power supply terminal of the current detection module is connected to the +12V load output terminal; the signal output terminal is connected to the MCU control module.

3. The elevator emergency rescue device charging protection system as described in claim 2, characterized in that, The MCU control module includes a signal input terminal and a control output terminal. The signal input terminal of the MCU control module is connected to the output terminal of the current detection module, the output terminal of the battery voltage detection unit, and the output terminal of the load voltage detection unit. The control output terminal is connected to the output terminal of the switch control module and the output terminal of the rescue module.

4. The elevator emergency rescue device charging protection system as described in claim 3, characterized in that, The battery module has an input terminal and an output terminal. The input terminal of the battery module is connected to the output terminal of the switch control module to form a mains power charging mode. The output terminal of the battery module is connected to the rescue module and is also connected to the current sampling terminal of the current detection module.

5. The elevator emergency rescue device charging protection system as described in claim 4, characterized in that, The rescue module has an input terminal and an output terminal. The input terminal of the rescue module is connected to the output terminal of the battery module, and the output terminal of the rescue module is connected to the rescue load.

6. The elevator emergency rescue device charging protection system as described in claim 5, characterized in that, The rescue module's input control terminal is started or stopped by the MCU control module.

7. The elevator emergency rescue device charging protection system as described in claim 1, characterized in that, The specifications of the switch control module conform to GB / T 14714-2008.

8. The elevator emergency rescue device charging protection system as described in claim 1, characterized in that, The model number of the MCU control module is EBK1002B.

9. The elevator emergency rescue device charging protection system as described in claim 1, characterized in that, The battery module is a 12V / 7AH lead-acid battery.

10. The elevator emergency rescue device charging protection system as described in claim 1, characterized in that, The battery module is a 12V / 9AH lead-acid battery.

Images