A single lithium battery emergency boost power supply circuit for a window cleaning machine and a window cleaning machine

Abstract

The utility model provides a single section lithium battery emergency boost power supply circuit and window cleaning machine for window cleaning machine, single section lithium battery emergency boost power supply circuit includes battery port for storing electric energy or output direct current, power management circuit is connected with battery port for carrying out charge management and discharge control to battery, power input module is connected with power management circuit for providing electric energy for battery or power management circuit, boost circuit is connected with battery port for carrying out boost to direct current of battery output, boost output module is connected with boost circuit for output direct current output voltage after boost circuit processing, the utility model discloses through adopting single section lithium battery cooperation boost circuit realizes emergency power supply, and the battery adopts detachable design and is convenient for user maintenance replacement, meets dangerous goods transportation certification requirement simultaneously, has the advantages such as improving battery replaceability, simplifying transportation certification process and improving emergency power supply reliability.

Description

Technical Field

[0001] This utility model relates to the field of window cleaning machine technology, specifically to an emergency boost power supply circuit for a single lithium battery used in window cleaning machines. Background Technology

[0002] With the increasing number of high-rise buildings in cities and the growing demand for cleaner living environments from families, window cleaning robots, as intelligent and automated window cleaning equipment, are gradually gaining widespread application in both residential and commercial sectors. These robots adhere firmly to the glass surface through negative pressure adsorption or magnetic attraction, and, driven by a control system, perform path planning, automatic wiping, and boundary recognition, greatly improving the safety and efficiency of window cleaning operations.

[0003] However, most window cleaning robots on the market currently integrate backup batteries for emergency power to prevent the device from falling due to power outages, disconnections, or loose connections during cleaning. However, these backup batteries are mostly non-removable, which not only limits their charging control, safety protection, and lifespan management, but also increases the operational burden on companies because lithium batteries are classified as dangerous goods in export trade, requiring specialized certification for transportation, packaging, and customs clearance. Furthermore, users cannot replace or maintain the batteries themselves; when the batteries age or are damaged, the entire machine must be disassembled or returned to the factory for repair, severely impacting ease of use and product sustainability. Utility Model Content

[0004] The purpose of this invention is to provide a single-cell lithium battery emergency boost power supply circuit and a window cleaning machine, which has the advantages of improving battery replaceability, simplifying transportation certification process and improving emergency power supply reliability.

[0005] On the one hand, this utility model provides an emergency boost power supply circuit for a single lithium battery used in window cleaning machines, comprising:

[0006] The battery port is used to store electrical energy or output direct current.

[0007] The power management circuit is electrically connected to the battery port and is used for battery charging management and discharge control.

[0008] The power input module is electrically connected to the power management circuit and is used to provide power to the battery or the power management circuit.

[0009] The boost circuit is electrically connected to the battery port and is used to boost the DC power output from the battery.

[0010] The boost output module is electrically connected to the boost circuit and is used to output the DC output voltage processed by the boost circuit.

[0011] Furthermore, the boost circuit includes a boost control unit, an energy storage unit, an enable filter unit, an output filter unit, and a voltage feedback unit. The boost control unit is electrically connected to the energy storage unit, the enable filter unit, the output filter unit, and the voltage feedback unit, respectively. The enable filter unit is electrically connected to the energy storage unit, and the energy storage unit is electrically connected to the output filter unit.

[0012] Furthermore, the boost control unit includes a boost chip U1, resistors R2, R3, R6, and R7, capacitors C1, C2, C4, C5, and C10. The VCC pin of the boost chip U1 is grounded through capacitor C4, the COMP pin of the boost chip U1 is grounded through capacitor C1 and resistor R2, capacitor C1 and resistor R2 are connected in series, capacitor C2 is connected across capacitor C1 and resistor R2, the ILIL pin of the boost chip U1 is grounded through resistor R3, the SS / EMI pins of the boost chip U1 are grounded through capacitor C10 and resistor R7 respectively, and the SW pin of the boost chip U1 is grounded through capacitor C5 and resistor R6.

[0013] Furthermore, the energy storage unit includes an inductor L1, a diode D1, a diode D2, and a diode D3. One end of the inductor L1 is connected to the filter unit, and the other end is connected to the SW pin of the boost chip U1, the anode of diode D1, the anode of diode D2, and the anode of diode D3. The cathodes of diode D1, diode D2, and diode D3 are connected to the output filter unit.

[0014] Furthermore, the output filter unit includes capacitors C11, C12, C13, C14, C15, C16, C17, and C18, resistors R8, R9, and R11. One end of capacitor C11 is connected to one end of capacitors C12, C13, C14, and C15, one end of resistor R11, the output terminal VOUT, the cathodes of diodes D1, D2, and D3, and the other end of capacitor C11 is connected to the other end of capacitors C12 and C13, as well as ground. The other ends of capacitors C13 and C15 are grounded. The other end of resistor R11 is grounded through capacitor C16. One end of resistor R8 is connected to the anodes of diodes D1, D2, and D3, and the other end of resistor R8 is grounded through capacitor C17. One end of resistor R9 is connected to the anodes of diodes D1, D2, and D3, and the other end of resistor R9 is grounded through capacitor C18.

[0015] Furthermore, the enable filter unit includes capacitors C6, C7, C8, and C9, and resistor R12. One end of resistor R12 is connected to the EN pin of the boost chip U1, and the other end of resistor R12 is connected to the PVIN output port, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, one end of capacitor C9, and inductor L1. The other ends of capacitors C6, C7, C8, and C9 are grounded.

[0016] Furthermore, the voltage feedback unit includes a capacitor C3, a resistor R1, a resistor R4, and a resistor R5. One end of the capacitor C3 is grounded, and the other end is connected to the output terminal VOUT of the boost chip U1 and one end of the resistor R4. The other end of the resistor R4 is connected to one end of the resistor R5. The other end of the resistor R5 is connected to one end of the resistor R1 and the F pin of the boost chip U1. The other end of the resistor R1 is grounded.

[0017] Furthermore, the power management circuit includes a power management chip U2 and its peripheral circuitry. The peripheral circuitry includes a switching transistor Q1, capacitors C19, C20, C21, and C22, resistors R14, R15, R16, and R17, diodes D4 and D5, and an inductor L2. Switch Q1 is a PNP transistor. The base of switch Q1 is connected to the BAT pin of the power management chip U2. The collector of switch Q1 is connected to the anode of diode D5. The emitter of switch Q1 is connected to the power input module and one end of capacitor C21. The other end of capacitor C21 is grounded. The cathode of diode D5 is connected to the diode... The cathode of diode D4 is connected to one end of inductor L2. The anode of diode D4 is grounded. The other end of inductor L2 is connected to the FB pin of power management chip U2 and one end of resistor R17. The other end of resistor R17 is grounded through capacitor C22 and connected to the COMP pin, PVIN port, and one end of resistor R15 of power management chip U2. The other end of resistor R15 is connected to the SEL pin of power management chip U2 and one end of resistor R16. The other end of resistor R16 is grounded. The NTC pin of power management chip U2 is grounded through resistor R14 and capacitor C20. The PVCC pin of power management chip U2 is connected to the power input module through capacitor C19.

[0018] Furthermore, the boost converter chip U1 is model number HT7179, and the power management chip U2 is model number CN3765.

[0019] On the other hand, this utility model also provides a window cleaning machine, including a window cleaning machine body and a circuit board disposed in the window cleaning machine body, the circuit board including the above-mentioned emergency boost power supply circuit for a single lithium battery for the window cleaning machine.

[0020] As can be seen from the above, the single-cell lithium battery emergency boost power supply circuit and window cleaning machine provided in this application achieve emergency power supply by using a single-cell lithium battery in conjunction with a boost circuit. The battery adopts a detachable design to facilitate user maintenance and replacement, and at the same time meets the dangerous goods transportation certification requirements. It has the advantages of improving battery replaceability, simplifying the transportation certification process, and improving the reliability of emergency power supply. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Fig. 1 This is a circuit block diagram of the first embodiment of the present invention;

[0023] Fig. 2 This is the circuit diagram of the boost circuit of this utility model;

[0024] Fig. 3 This is the circuit diagram of the power management circuit of this utility model.

[0025] Figure label:

[0026] 100. Battery port; 200. Power management circuit; 300. Power input module;

[0027] 400. Boost circuit; 410. Boost control unit; 420. Energy storage unit; 430. Enable filter unit; 440. Output filter unit; 450. Voltage feedback unit;

[0028] 500, Boost Output Module. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0031] 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 embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] In existing technologies, window cleaning robots are typically equipped with non-removable backup batteries to cope with emergency power outages. This design makes battery maintenance difficult, as users cannot replace aging batteries themselves and the entire machine must be returned for repair. Furthermore, non-removable lithium batteries must meet hazardous materials certification requirements during transportation, increasing operating costs for businesses.

[0034] To address the aforementioned issues and the pain points of difficult backup battery maintenance and transportation limitations in traditional window cleaning robots, the design team began exploring modular power supply solutions. By analyzing the functional requirements of the battery system, they discovered the urgent need for a detachable single-cell lithium battery structure, while also retaining an emergency boost function to ensure the device's adhesion during power outages. After repeated verification of the power supply topology, they ultimately decided to design the energy storage unit 420, power management, and boost function separately, forming an independent power supply module.

[0035] Therefore, refer to Figs. 1-3 This application proposes an emergency power supply system comprising a battery, a power management circuit 200, a power input module 300, a boost circuit 400, and a boost output module 500. The battery, acting as an independent energy storage unit 420, stores electrical energy. The power management circuit 200 connects to the battery and controls the charging and discharging process. The power input module 300 provides external power input to the system. The boost circuit 400 boosts the voltage output from the battery, and the boost output module 500 delivers the processed electrical energy to the load.

[0036] The battery port 100 refers to a removable single-cell lithium-ion battery, specifically using 18650 or 21700 cells, serving as an independent energy storage unit 420 to provide basic power to the system. The power management circuit 200 is an integrated circuit with charge / discharge protection, monitoring battery voltage and current parameters to provide overcharge and over-discharge protection, ensuring battery safety. The power input module 300 is a charging interface with reverse connection protection, receiving external power input via a Type-C or Micro USB port. The boost circuit 400 is a DC-DC converter based on switching power supply principles, boosting the 3.7V lithium battery voltage to over 12V to meet the voltage requirements of the window cleaning machine's adsorption motor. The boost output module 500 is a voltage output terminal with filtering functionality, using an LC filter network to eliminate switching noise and provide a stable DC power supply.

[0037] Specifically, the battery is connected to the power management circuit 200 via a detachable interface and is charged by the power input module 300 under normal operating conditions. When an external power interruption is detected, the power management circuit 200 controls the battery to discharge to the boost circuit 400. After the boost circuit 400 boosts the battery output voltage to the device's operating voltage, the voltage is filtered by the boost output module 500 to form a stable DC power supply, which continuously powers the window cleaning machine's adsorption mechanism.

[0038] Compared to existing technologies, traditional solutions use non-removable battery packs and lack independent boost modules, leading to difficult system maintenance and an inability to flexibly adapt to devices with different voltages. This solution, through modular design, allows for individual battery removal and replacement, and separates the boost circuit 400 from the power management function, reducing transportation certification difficulties and improving voltage adaptability for emergency power supply.

[0039] Through the above technical solution, this application effectively solves the maintenance problem caused by the non-removable backup battery of the window cleaning robot and simplifies the lithium battery transportation certification process. The design of a single battery with an independent boost circuit 400 ensures reliable emergency power supply while allowing battery replacement to be completed without professional tools, significantly improving product maintainability.

[0040] This application further proposes a boost circuit 400 including a boost control unit 410, an energy storage unit 420, an enable filter unit 430, an output filter unit 440, and a voltage feedback unit 450. The boost control unit 410 is electrically connected to the energy storage unit 420, the enable filter unit 430, the output filter unit 440, and the voltage feedback unit 450, respectively. The enable filter unit 430 is electrically connected to the energy storage unit 420, and the energy storage unit 420 is electrically connected to the output filter unit 440.

[0041] The boost control unit 410 is the core module used to regulate the charging and discharging sequence of the energy storage unit 420 and the output voltage amplitude. It can be implemented using an integrated circuit chip in conjunction with an external resistor-capacitor network, dynamically adjusting the switching frequency by receiving monitoring signals from the voltage feedback unit 450. The energy storage unit 420 is a component used to temporarily store electrical energy and release it during the boost process. It can be implemented using a combination of inductors and diodes, achieving charge storage and directional transfer through magnetic energy conversion. The enable filter unit 430 is a circuit used to eliminate high-frequency interference from the input signal and control the boost start / stop state. It can be implemented using an RC filter network, suppressing voltage fluctuations through a multi-stage capacitor parallel structure. The output filter unit 440 is a circuit used to smooth the DC voltage ripple after boosting. It can be implemented using a multi-stage LC filter network, absorbing high-frequency harmonics through a combination of distributed capacitors and resistors. The voltage feedback unit 450 is a circuit used to sample the output voltage and form a closed-loop control. It can be implemented using a resistor divider network and a compensation capacitor combination, achieving output voltage regulation through real-time voltage sampling.

[0042] Specifically, the boost control unit 410 coordinates the collaborative operation of each unit through electrical connections. When the battery outputs voltage, the enable filter unit 430 first filters out high-frequency noise from the input power and then delivers the filtered power to the energy storage unit 420. The energy storage unit 420, driven by the switching signal from the boost control unit 410, performs periodic charging and discharging to boost the input voltage to the target value. The output filter unit 440 performs multi-stage filtering on the boosted pulsating voltage, while the voltage feedback unit 450 monitors the output voltage value in real time and feeds the sampled signal back to the boost control unit 410 through a resistor network to form a closed-loop regulation. This modular architecture, through the precise division of labor among the functional units, ensures the stability and response speed of the boost process.

[0043] This application further proposes a boost control unit 410 including a boost chip U1, resistors R2, R3, R6, and R7, capacitors C1, C2, C4, C5, and C10. The VCC pin of the boost chip U1 is grounded through capacitor C4, the COMP pin of the boost chip U1 is grounded through capacitor C1 and resistor R2, capacitor C1 and resistor R2 are connected in series, capacitor C2 is connected across capacitor C1 and resistor R2, the ILIL pin of the boost chip U1 is grounded through resistor R3, the SS / EMI pins of the boost chip U1 are grounded through capacitor C10 and resistor R7 respectively, and the SW pin of the boost chip U1 is grounded through capacitor C5 and resistor R6.

[0044] Among them, the boost chip U1 refers to the integrated circuit used to control the DC boost process. Specifically, it can be implemented using a chip with the model number HT7179. It receives power through the VCC pin and outputs the boosted pulse signal through the SW pin.

[0045] Among them, capacitor C4 refers to the filter capacitor used for power supply decoupling, which can be implemented using a ceramic capacitor to eliminate power supply noise on the VCC pin.

[0046] Among them, capacitor C1 and resistor R2 refer to the series network used for loop compensation, which can be implemented using an RC series structure to adjust the stability of the feedback loop of the boost chip.

[0047] Among them, capacitor C2 refers to the filter capacitor connected across the compensation network. Specifically, it can be implemented using a surface-mount capacitor with low equivalent series resistance to suppress the impact of high-frequency interference on the compensation network.

[0048] Among them, resistor R3 refers to the sampling resistor used for current detection. Specifically, it can be implemented using a precision metal film resistor, which is used to convert the load current signal into a voltage signal for chip processing.

[0049] Among them, capacitor C10 and resistor R7 refer to the parallel network used for soft start and electromagnetic interference suppression. Specifically, it can be implemented using an RC parallel structure to control the speed of the boost start process and reduce switching noise.

[0050] Among them, capacitor C5 and resistor R6 refer to the damping network used to absorb the peaks of the switching node. Specifically, it can be implemented using an RC series structure to suppress the voltage oscillations generated by the SW pin during switching.

[0051] Specifically, the boost chip U1 adjusts the frequency response characteristics of its internal error amplifier through an RC compensation network connected to the COMP pin, ensuring stability during the boost process under different load conditions. Capacitor C4 filters the power supply to the VCC pin, preventing power fluctuations from affecting chip operation. Capacitor C2, connected across the compensation network, further filters out high-frequency noise, preventing false triggering of the chip's protection mechanism. Resistor R3 converts the output current into a voltage signal, which is fed back to the chip via the ILIL pin to achieve overcurrent protection. The RC network connected to the SS / EMI pin controls the voltage ramp-up slope during boost startup, avoiding current surges and reducing high-frequency switching noise interference to external circuits. The RC damping network connected to the SW pin absorbs high-frequency oscillations at the switching node, reducing electromagnetic radiation and power device losses.

[0052] In one embodiment, the energy storage unit 420 includes an inductor L1, a diode D1, a diode D2, and a diode D3. One end of the inductor L1 is connected to a filter unit, and the other end is connected to the SW pin of the boost chip U1, the anode of diode D1, the anode of diode D2, and the anode of diode D3. The cathodes of diodes D1, D2, and D3 are connected to the output filter unit 440.

[0053] In this design, inductor L1 is a magnetic component used to store and release electromagnetic energy. It can be implemented using a coil wound with a ferrite core, achieving voltage conversion through periodic charging and discharging during the boost process. Diodes D1, D2, and D3 are semiconductor devices with unidirectional conductivity, specifically implemented using Schottky diodes. Their parallel connection creates a low-impedance path during the discharge phase of energy storage unit 420, while simultaneously suppressing the impact of reverse current on the boost chip. The diode anodes are connected in parallel to the end of inductor L1, and their cathodes are connected to the output filter unit 440, forming a multi-path energy transfer structure that reduces the conduction loss of a single diode.

[0054] Specifically, during the operation of the boost circuit 400, inductor L1 receives pulse voltage signals through the SW pin of the boost chip U1 and is periodically magnetized. When the SW pin outputs a high level, inductor L1 stores energy; when the SW pin switches to a low level, inductor L1 releases energy and transfers it to the output filter unit 440 through three diodes connected in parallel. The three diodes are connected in parallel topology, which can distribute the conduction current in high-current scenarios and avoid damage from overheating of individual components. The cathodes of the diodes are all connected to the input terminal of the output filter unit 440, so that the boost current output by the energy storage unit 420 is collected to the filter capacitor through multiple paths, reducing the impact of line voltage drop on the stability of the output voltage.

[0055] In one embodiment, the output filter unit 440 includes capacitors C11, C12, C13, C14, C15, C16, C17, and C18, and resistors R8, R9, and R11. One end of capacitor C11 is connected to one end of capacitors C12, C13, C14, C15, and R11, the output terminal VOUT, the cathodes of diodes D1, D2, and D3, and the other end of capacitor C11 is connected to the other end of capacitors C12 and C13 and ground. The other ends of capacitors C13 and C15 are grounded. The other end of resistor R11 is grounded through capacitor C16. One end of resistor R8 is connected to the anodes of diodes D1, D2, and D3, and the other end of resistor R8 is grounded through capacitor C17. One end of resistor R9 is connected to the anodes of diodes D1, D2, and D3, and the other end of resistor R9 is grounded through capacitor C18.

[0056] The output filter unit 440 refers to the circuit structure used to smooth the high-frequency pulsating voltage output of the boost circuit 400. Specifically, it can be implemented using a combination of multi-stage parallel capacitors and voltage-dividing resistors, filtering out ripple interference in specific frequency bands through capacitors of different capacitance values. Resistors R8 and R9 are damping components used to adjust voltage fluctuations at the switching nodes of the boost circuit 400. These can be implemented using metal film resistors, reducing electromagnetic interference by absorbing high-frequency oscillation energy. Resistor R11 is the output voltage sampling feedback component, for example, a surface-mount resistor with a 1% accuracy, used to construct the closed-loop control reference for the boost circuit 400.

[0057] Specifically, after the pulsating DC voltage output by the boost circuit 400 is rectified by diodes D1 to D3, it undergoes initial high-frequency ripple filtering by a multi-stage filter network composed of capacitors C11 to C15. The large-capacity electrolytic capacitor C11 absorbs low-frequency fluctuations, while the small-capacity ceramic capacitors C12 to C15 are connected in parallel to filter out high-frequency noise. Resistor R8 and capacitor C17, and resistor R9 and capacitor C18, respectively form RC filter branches to further attenuate the switching spike voltage generated by the diodes' on / off states. Resistor R11 and capacitor C16 constitute a feedback signal filter network, filtering out the AC component in the output voltage sampling signal before sending it to the boost control chip for voltage regulation.

[0058] In one embodiment, the enable filter unit 430 includes capacitors C6, C7, C8, and C9, and resistor R12. One end of resistor R12 is connected to the EN pin of the boost chip U1, and the other end of resistor R12 is connected to the PVIN output port, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, one end of capacitor C9, and inductor L1. The other ends of capacitors C6, C7, C8, and C9 are grounded.

[0059] In this circuit, resistor R12 is a component connected in series in the enable signal path of the boost chip for current limiting and voltage division. It can be implemented using a metal film resistor or a carbon film resistor. In the circuit, it is used to adjust the input impedance of the enable signal and suppress high-frequency interference. Capacitors C6, C7, C8, and C9 are filter components connected in parallel between the power input terminal and ground. They can be implemented using ceramic capacitors or aluminum electrolytic capacitors. The multi-stage filter network formed by their combination can cover a wide frequency range of noise suppression, eliminating the influence of voltage fluctuations and switching noise at the power input terminal on the enable control of the boost chip. Inductor L1 is an energy storage component, specifically implemented using a ferrite core wire-wound inductor. It, together with the capacitors, forms an LC filter structure to further filter out high-frequency interference signals.

[0060] Specifically, when the EN pin of the boost chip U1 receives an enable signal from the power management circuit 200, resistor R12 limits the current of this signal to prevent overcurrent surges from damaging the chip. The power supply voltage input at the PVIN port is filtered for high-frequency noise by a parallel filter network composed of capacitors C6-C9. Simultaneously, inductor L1 works in conjunction with the filter capacitors to suppress transient voltage spikes generated by the switching circuit. This structure eliminates interference signals on the power path through multi-stage filtering, ensuring the stability of the boost chip's enable control signal and preventing abnormal startup or shutdown of the boost circuit 400 due to noise-triggered malfunctions.

[0061] In one embodiment, the voltage feedback unit 450 includes a capacitor C3, a resistor R1, a resistor R4, and a resistor R5. One end of the capacitor C3 is grounded, and the other end is connected to the output terminal VOUT of the boost chip U1 and one end of the resistor R4. The other end of the resistor R4 is connected to one end of the resistor R5. The other end of the resistor R5 is connected to one end of the resistor R1 and the F pin of the boost chip U1. The other end of the resistor R1 is grounded.

[0062] In this circuit, capacitor C3 is a filter capacitor used to remove high-frequency noise from the output voltage. It can be implemented using a ceramic capacitor or an electrolytic capacitor, and its ground terminal forms a filter loop with the output terminal of the boost chip. Resistors R4 and R5 are feedback resistors that form the voltage divider network. They can be implemented using precision surface-mount resistors or metal film resistors. By adjusting the ratio of their resistance values, the output voltage is fed back to the control terminal of the boost chip proportionally. Resistor R1 is a pull-down resistor, which can be implemented using a fixed-value surface-mount resistor, used to establish a reference potential in the feedback loop.

[0063] Specifically, when the boost circuit 400 is running, the output voltage is filtered at high frequency by capacitor C3 and then enters the voltage divider network. Resistors R4 and R5 are connected in series to divide the voltage, generating a feedback voltage signal. This signal is compared with the internal reference voltage of the boost chip, and the output voltage is controlled in a closed-loop manner by adjusting the duty cycle. Resistor R1 pulls the feedback node down to ground potential to prevent signal drift from causing control failure. For example, when the output voltage fluctuates due to load changes, the voltage divider network detects this in real time and feeds it back to the boost chip. The chip then adjusts the switching frequency accordingly, restoring the output voltage to the set value.

[0064] In one embodiment, the power management circuit 200 includes a power management chip U2 and its peripheral circuitry. The peripheral circuitry includes a switching transistor Q1, capacitors C19, C20, C21, and C22, resistors R14, R15, R16, and R17, diodes D4 and D5, and an inductor L2. Switch Q1 is a PNP transistor. The base of switch Q1 is connected to the BAT pin of the power management chip U2. The collector of switch Q1 is connected to the anode of diode D5. The emitter of switch Q1 is connected to the power input module 300 and one end of capacitor C21. The other end of capacitor C21 is grounded. The cathode of diode D5 is connected to… Connect the cathode of diode D4 to one end of inductor L2. The anode of diode D4 is grounded. The other end of inductor L2 is connected to the FB pin of power management chip U2 and one end of resistor R17. The other end of resistor R17 is grounded through capacitor C22 and connected to the COMP pin, PVIN port, and one end of resistor R15 of power management chip U2. The other end of resistor R15 is connected to the SEL pin of power management chip U2 and one end of resistor R16. The other end of resistor R16 is grounded. The NTC pin of power management chip U2 is grounded through resistor R14 and capacitor C20. The PVCC pin of power management chip U2 is connected to power input module 300 through capacitor C19.

[0065] Among them, the power management chip U2 refers to the integrated circuit used to realize the charging management and discharging control of lithium battery. Specifically, it can be implemented using the CN3765 chip. Through its peripheral circuit and cooperation with the battery and power input module 300, it completes the functions of voltage regulation, current monitoring and charging and discharging protection.

[0066] The switching transistor Q1 refers to a transistor device used to control the charging and discharging path. Specifically, it can be implemented using a PNP type transistor. The base signal controls the conduction state between the collector and emitter, thereby adjusting the connection between the battery and the external circuit.

[0067] Peripheral circuits refer to auxiliary circuit modules designed around the power management chip, specifically including components such as filter capacitors, voltage divider resistors, freewheeling diodes, and energy storage inductors, used to realize input filtering, voltage feedback, temperature detection, and energy buffering functions.

[0068] Specifically, the power management chip outputs a control signal to the base of the switching transistor Q1 via the BAT pin, adjusting the connection state between the battery and the power input module 300. When the battery needs charging, the switching transistor is turned on, and the external power supply is filtered by capacitor C21 before charging the battery. When the battery is discharging, the switching transistor is turned off, and the battery energy is output through the boost circuit 400. Inductor L2 and diodes D4 and D5 form a freewheeling circuit to suppress voltage spikes when the switching transistor operates. Capacitor C22 and resistor R17 form a feedback network to stabilize the output voltage. Resistors R15 and R16 set the chip's operating mode, and capacitor C20 and resistor R14 work together to monitor the temperature and prevent the battery from overheating. Capacitor C19 filters the chip's power supply terminal to ensure the stability of the control signal.

[0069] This application further specifies that the boost chip U1 is model number HT7179 and the power management chip U2 is model number CN3765.

[0070] The HT7179 refers to a high-efficiency boost DC-DC converter chip that supports a wide input voltage range. It can be implemented using a single-chip solution with integrated multi-level protection and a built-in switching transistor. In the circuit, it is responsible for boosting the low voltage output from a single lithium battery to the operating voltage required by the window cleaning machine drive system. The CN3765 refers to a power management chip that supports multi-mode charging management. It can be implemented using an integrated circuit with charging / discharging status monitoring, temperature protection, and equalization control functions. In the circuit, it is responsible for safe charging control and discharge path management of the lithium battery.

[0071] Specifically, by selecting the HT7179 as the boost converter chip, this circuit can quickly initiate a boost operation when the lithium battery voltage drops to a critical value, stabilizing the output voltage within the DC level range required for the window cleaning machine to operate. This ensures that the equipment can maintain basic functions even in the event of a sudden power outage or mains power failure. Meanwhile, the CN3765 chip dynamically adjusts the charging and discharging current thresholds by monitoring the battery's state of charge and temperature parameters in real time, preventing battery performance degradation or safety hazards caused by overcharging, over-discharging, or overheating. It also allows users to independently replace the battery via an external interface without disassembling the circuit board.

[0072] In some specific implementations, the enable pin of the HT7179 can control the start and stop of the boost function through an external signal, and the resistance value of the voltage divider configured on its feedback pin can be adjusted according to the target output voltage; the charging mode selection pin of the CN3765 can be connected to resistors of different values ​​to adapt to different types of single-cell batteries such as lithium iron phosphate or ternary lithium.

[0073] This application further proposes a window cleaning machine, including a window cleaning machine body and a circuit board disposed within the window cleaning machine body. The circuit board includes a single-cell lithium battery emergency boost power supply circuit for the window cleaning machine.

[0074] The window cleaning robot body refers to the shell that carries the mechanical structure and moving parts of the window cleaning robot. It is the main device used to realize the functions of adsorption, movement, and wiping. Specifically, it can be made of lightweight alloy or engineering plastic frame, and its internal space design must meet the requirements of circuit board installation. The circuit board refers to the printed circuit board that integrates the power supply circuit and control system. Specifically, it can be made of multi-layer copper-clad board combined with surface mount technology. Its layout must be compatible with the electrical connection requirements of lithium battery and boost circuit 400. The single-cell lithium battery emergency boost power supply circuit is an emergency power supply system composed of a single lithium-ion battery, a power management module, and a boost module. Specifically, voltage conversion is achieved through the coordinated work of boost chip, energy storage inductor, and filter capacitor. This circuit automatically switches to boost mode when power is lost to maintain the window cleaning robot's adsorption and movement functions.

[0075] Specifically, the window cleaning machine's circuit board integrates a single-cell lithium battery power supply system. When the external power supply is abnormally disconnected, the power management circuit 200 initiates discharge control, and the boost circuit 400 boosts the low voltage output from the lithium battery to the voltage level required for the window cleaning machine to operate. During the boost process, the energy storage unit 420 stores electrical energy and eliminates voltage ripple through the filtering unit. The voltage feedback unit 450 monitors the output voltage in real time and adjusts the boost amplitude to ensure power supply stability. The power input module 300 works in conjunction with the power management chip, automatically switching to charging mode when the external power supply is restored, while simultaneously providing overcharge and over-discharge protection for the battery.

[0076] Compared to existing technologies, most window cleaning robots use non-removable multi-cell battery packs as backup power, which are subject to hazardous materials control restrictions during transportation, and battery maintenance requires complete disassembly of the entire machine. This solution reduces transportation risks through a single-cell lithium battery design, and allows users to replace batteries independently through a detachable structure, avoiding complete machine repair due to battery failure. Furthermore, the integrated power management circuit 200 and boost circuit 400 simplify system complexity and reduce circuit board space requirements.

[0077] Through the above technical solution, this application solves the problems of poor transportation compliance and difficult user maintenance caused by the non-removable spare battery of the window cleaning machine. The single lithium battery meets the exemption standards for low-capacity hazardous materials, simplifying the transportation process; the modular design of the circuit board makes battery replacement convenient, allowing users to complete maintenance without professional tools. The boost power supply circuit provides a stable output driving voltage in emergencies, ensuring the window cleaning machine continues to adhere and avoiding the risk of falling.

[0078] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A single-cell lithium battery emergency boost power supply circuit for a window cleaning machine, characterized in that, include: Battery port (100) is used to store electrical energy or output DC power; A power management circuit (200) is electrically connected to the battery port (100) and is used to perform charging management and discharging control on the battery port (100). A power input module (300) is electrically connected to the power management circuit (200) and is used to provide power to the battery port (100) or the power management circuit (200); A boost circuit (400) is electrically connected to the battery port (100) and is used to boost the DC power output from the battery port (100); A boost output module (500) is electrically connected to the boost circuit (400) and is used to output the DC output voltage processed by the boost circuit (400).

2. The emergency boost power supply circuit for a single lithium battery used in a window cleaning machine according to claim 1, characterized in that, The boost circuit (400) includes a boost control unit (410), an energy storage unit (420), an enable filter unit (430), an output filter unit (440), and a voltage feedback unit (450). The boost control unit (410) is electrically connected to the energy storage unit (420), the enable filter unit (430), the output filter unit (440), and the voltage feedback unit (450), respectively. The enable filter unit (430) is electrically connected to the energy storage unit (420), and the energy storage unit (420) is electrically connected to the output filter unit (440).

3. The emergency boost power supply circuit for a single lithium battery used in a window cleaning machine according to claim 2, characterized in that, The boost control unit (410) includes a boost chip U1, resistors R2, R3, R6, and R7, capacitors C1, C2, C4, C5, and C10. The VCC pin of the boost chip U1 is grounded through capacitor C4. The COMP pin of the boost chip U1 is grounded through capacitor C1 and resistor R2. Capacitor C1 and resistor R2 are connected in series. Capacitor C2 is connected across capacitor C1 and resistor R2. The ILIL pin of the boost chip U1 is grounded through resistor R3. The SS / EMI pins of the boost chip U1 are grounded through capacitor C10 and resistor R7. The SW pin of the boost chip U1 is grounded through capacitor C5 and resistor R6.

4. The emergency boost power supply circuit for a single lithium battery used in a window cleaning machine according to claim 3, characterized in that, The energy storage unit (420) includes an inductor L1, a diode D1, a diode D2, and a diode D3. One end of the inductor L1 is connected to the filter unit, and the other end is connected to the SW pin of the boost chip U1, the anode of the diode D1, the anode of the diode D2, and the anode of the diode D3. The cathodes of the diodes D1, D2, and D3 are connected to the output filter unit (440).

5. The emergency boost power supply circuit for a single lithium battery used in a window cleaning machine according to claim 4, characterized in that, The output filtering unit (440) includes capacitors C11, C12, C13, C14, C15, C16, C17, and C18, resistors R8, R9, and R11. One end of capacitor C11 is connected to one end of capacitors C12, C13, C14, and C15, one end of resistor R11, the output terminal VOUT, the cathodes of diodes D1, D2, and D3, and the other end is connected to the other end of capacitor C12. The other end of capacitor C13 and the ground terminal are connected. The other end of capacitor C13 and the other end of capacitor C15 are grounded. The other end of resistor R11 is grounded through capacitor C16. One end of resistor R8 is connected to the anodes of diodes D1, D2, and D3. The other end of resistor R8 is grounded through capacitor C17. One end of resistor R9 is connected to the anodes of diodes D1, D2, and D3. The other end of resistor R9 is grounded through capacitor C18.

6. The emergency boost power supply circuit for a single lithium battery used in a window cleaning machine according to claim 5, characterized in that, The enable filter unit (430) includes capacitors C6, C7, C8, and C9, and resistor R12. One end of resistor R12 is connected to the EN pin of the boost chip U1, and the other end of resistor R12 is connected to the PVIN output port, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, one end of capacitor C9, and inductor L1. The other ends of capacitors C6, C7, C8, and C9 are grounded.

7. The emergency boost power supply circuit for a single lithium battery used in a window cleaning machine according to claim 6, characterized in that, The voltage feedback unit (450) includes a capacitor C3, a resistor R1, a resistor R4 and a resistor R5. One end of the capacitor C3 is grounded, and the other end is connected to the output terminal VOUT of the boost chip U1 and one end of the resistor R4. The other end of the resistor R4 is connected to one end of the resistor R5. The other end of the resistor R5 is connected to one end of the resistor R1 and the F pin of the boost chip U1. The other end of the resistor R1 is grounded.

8. The emergency boost power supply circuit for a single lithium battery used in a window cleaning machine according to claim 7, characterized in that, The power management circuit (200) includes a power management chip U2 and its peripheral circuits. The peripheral circuits include a switching transistor Q1, capacitors C19, C20, C21, and C22, resistors R14, R15, R16, and R17, diodes D4 and D5, and an inductor L2. The switching transistor Q1 is a PNP transistor. The base of the switching transistor Q1 is connected to the BAT pin of the power management chip U2. The collector of the switching transistor Q1 is connected to the anode of the diode D5. The emitter of the switching transistor Q1 is connected to the power input module (300) and one end of the capacitor C21. The other end of the capacitor C21 is grounded. The cathode of the diode D5 is connected to the diode D4. The cathode and one end of the inductor L2 are connected, the anode of the diode D4 is grounded, the other end of the inductor L2 is connected to the FB pin of the power management chip U2 and one end of the resistor R17, the other end of the resistor R17 is grounded through the capacitor C22, and connected to the COMP pin, PVIN port and one end of the resistor R15 of the power management chip U2, the other end of the resistor R15 is connected to the SEL pin of the power management chip U2 and one end of the resistor R16, the other end of the resistor R16 is grounded, the NTC pin of the power management chip U2 is grounded through the resistor R14 and the capacitor C20, and the PVCC pin of the power management chip U2 is connected to the power input module (300) through the capacitor C19.

9. The emergency boost power supply circuit for a single lithium battery used in a window cleaning machine according to claim 8, characterized in that, The boost chip U1 is model HT7179, and the power management chip U2 is model CN3765.

10. A window cleaning machine, comprising a window cleaning machine body and a circuit board disposed within the window cleaning machine body, the circuit board comprising a single-cell lithium battery emergency boost power supply circuit for a window cleaning machine as described in any one of claims 1 to 9.

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