Power supply link of low-power-consumption parking lock and low-power-consumption parking lock

Abstract

The utility model discloses a power supply link of a low-power-consumption parking lock. The power supply link comprises a power supply interface used for receiving an external power supply; the battery module is connected with the power supply interface and is used for storing electric energy of an external power supply and supplying power to the low-power-consumption parking space lock under the condition of no external power supply; the core power supply module is connected with the power interface and the battery module and is used for directly supplying power to a main control circuit of the low-power-consumption parking lock; and the non-core power supply module is connected with the power interface and the battery module and is used for supplying power to the functional circuit of the low-power-consumption parking lock according to the control of the main control circuit of the low-power-consumption parking lock. Operation power consumption of the parking space lock can be reduced, long-time operation of the parking space lock is facilitated, battery charging and replacing frequency is reduced, and operation cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle parking space management, and particularly relates to a power supply link of a low-power parking space lock. Background Art

[0002] In today's society, parking lot management and control are becoming more sophisticated. As a leading product for parking management, parking locks are also becoming more diverse in their use cases. In recent years, automatic parking locks have gradually replaced manual parking locks. The electronic control circuits of automatic parking locks require power. To reduce the complex wiring work in scenarios where parking lock wiring is inconvenient and provide flexibility and convenience, some parking locks use solar power. Solar panels are integrated into the parking locks, allowing them to charge in sunlight, making them suitable for outdoor or sunny areas. However, they are not suitable for underground parking lots or locations with a lot of smoke and dust. A low-power parking lock power supply link solution is needed to reduce the functionality of the parking lock and increase its battery life. Utility Model Content

[0003] The purpose of the present invention is to address the defects and shortcomings of the existing technology and provide a low-power parking lock power supply link to reduce the operating power consumption of the parking lock, facilitate the long-term operation of the parking lock, and reduce operating costs.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A power supply link for a low-power parking lock, comprising:

[0006] Power interface, used to receive external power;

[0007] A battery module connected to the power interface, used to store electrical energy from an external power source and to power the low-power parking lock when no external power source is available;

[0008] The core power supply module is connected to the power interface and the battery module to directly power the main control circuit of the low-power parking lock;

[0009] The non-core power supply module is connected to the power interface and the battery module, and is used to supply power to the functional circuit of the low-power parking lock according to the control of the main control circuit of the low-power parking lock.

[0010] Optionally, the core power supply module is also used to power the FLASH storage circuit and RTC clock circuit of the low-power parking lock.

[0011] Optionally, the functional circuit of the low-power parking lock includes one or more of an ultrasonic circuit, a position detection circuit, a Bluetooth remote control circuit, a 433MHz remote control circuit and a motor drive circuit; the non-core power supply module includes multiple power supply control units, which are respectively used to control the power supply of each functional circuit of the low-power parking lock.

[0012] Optionally, the power supply control unit includes a first switching tube, a second switching tube, a third switching tube, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor. The source of the first switching tube serves as a positive power input terminal to receive a front-end power input and is grounded through the first capacitor. The first resistor and the second capacitor are connected in parallel between the source and the gate of the first switching tube. The gate of the first switching tube is connected to the drain of the second switching tube via the second resistor. The gate of the first switching tube is connected to the gate of the third switching tube via the third resistor. The drain of the first switching tube serves as a positive power output terminal to provide power to the back end and is connected to the drain of the third switching tube via the fourth resistor. The fourth capacitor and the fifth capacitor are connected in parallel between the drain of the first switching tube and ground. The gate of the second switching tube is connected to a control terminal of a main control circuit of a low-power parking lock via the fifth resistor. The source of the second switching tube is grounded. The sixth resistor and the third capacitor are connected in parallel between the gate and the source of the second switching tube. The source of the third switching tube is grounded. The first switching tube is a PMOS tube, and the second and third switching tubes are both NMOS tubes.

[0013] Optionally, the power supply control unit further includes a step-down circuit connected to the drain of the first switching tube.

[0014] Optionally, the step-down circuit includes a step-down chip, an inductor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a sixth capacitor and a seventh capacitor. The input end of the step-down chip is connected to the upper power supply input end, the voltage between the upper power supply input end and the ground is divided by the seventh resistor and the eighth resistor and input to the enable end of the step-down chip, the sixth capacitor is connected in parallel between the bootstrap end and the switch end of the step-down chip, the switch end of the step-down chip is connected to the first end of the inductor, the second end of the inductor serves as the output end, the voltage between the output end and the ground is divided by the ninth resistor and the tenth resistor and input to the feedback end of the step-down chip, and a seventh capacitor is provided in parallel between the output end and the feedback end of the step-down chip.

[0015] Optionally, the battery module includes a battery power detection unit, which is used to detect the power level of the battery in the battery module and transmit the power level to the main control circuit of the low-power parking lock.

[0016] A low-power parking lock comprises a main control circuit, a functional module and a power supply link of the low-power parking lock as described in any one of the above items.

[0017] After adopting the above technical solution, the beneficial effects of the utility model are:

[0018] Since the power supply link of the low-power parking lock is equipped with a non-core power supply module, during the sleep period of the control chip, a control signal can be sent to the non-core power supply module to cut off the power supply to the functional circuit of the low-power parking lock, which can reduce the operating power consumption of the parking lock, facilitate the long-term operation of the parking lock, and reduce operating costs.

[0019] Since the non-core power supply module is equipped with a power supply control unit, when a high-level signal is input to the control terminal PW_EN of the main control circuit of the low-power parking lock, the second switch tube Q2 is turned on, the voltage difference between the source and the gate of the first switch tube Q1 is higher than the turn-on voltage, the first switch tube Q1 is turned on, and power can be supplied to other functional modules of the low-power parking lock through the power supply control unit. At this time, the voltage difference between the gate and the source of the third switch tube Q3 is not enough to reach the turn-on voltage, and the third switch tube Q3 is turned off; the first capacitor C1, the second capacitor C2, and the third capacitor C3 in the circuit are used to filter out interference, the fourth capacitor C4 and the fifth capacitor C5 are used to stabilize the voltage, and the first resistor R1, the second resistor R2, the third resistor R3, the fifth resistor R5 and the sixth resistor R6 are used to establish the turn-on voltage of each switch tube and limit the current in the branch; when the low-power parking lock When a low-level signal is input to the control terminal PW_EN of the main control circuit, the second switch tube Q2 is turned off, and the gates of the first switch tube Q1 and the third switch tube Q3 are both at a high level. The first switch tube Q1 is turned off, and the power supply control unit stops supplying power to other functional modules of the low-power parking lock. At this time, the third switch tube Q3 is turned on, and the charges in the fourth capacitor C4 and the fifth capacitor C5 can be quickly discharged through the fourth resistor R4, so that the functional modules connected to the back end quickly lose power and enter the shutdown state, thereby reducing the overall power consumption of the parking lock. When the parking lock is in standby mode, the current consumed is only at the microampere level. The power on and off links on each module of the parking lock can reasonably cut off the power supply of the module when the module is in standby mode, retaining the power supply of the main control part. When the main control is in sleep mode, it can also reduce its own power consumption, thereby achieving the purpose of low-power design of the equipment.

[0020] Since the battery module is equipped with a battery power detection unit, the control chip of the main control circuit of the low-power parking lock can obtain the battery power by detecting the battery voltage, and then further report it to the control platform; when the battery power of the device drops to a critical value, the device can report a low battery signal to inform the manager to replace the battery or charge it in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 Schematic diagram of the power supply link structure of a low-power parking lock and its connection with other circuits of the low-power parking lock in some embodiments;

[0023] Figure 2 Schematic diagram of the power supply link structure of a low-power parking lock and its connection with other circuits of the low-power parking lock in some embodiments;

[0024] Figure 3 is a schematic diagram of the circuit principle of a power supply control unit in some embodiments;

[0025] Figure 4 is a schematic diagram of the structure of a power supply control unit in some embodiments;

[0026] Figure 5 is a schematic diagram of a circuit principle of a step-down circuit in some embodiments;

[0027] Figure 6 The figure is a schematic diagram of the circuit principle of the battery power detection unit in some embodiments.

[0028] Description of reference numerals:

[0029] 100. Power supply link of low-power parking lock; 110. Power interface; 120. Battery module; 130. Core power supply module; 140. Non-core power supply module; 141. First power supply control unit; 142. Second power supply control unit; 143. Third power supply control unit; 144. Fourth power supply control unit; 145. Fifth power supply control unit; 210. Main control circuit; 220. Functional circuit; 221. Ultrasonic circuit; 222. Position detection circuit; 223. Bluetooth remote control circuit; 224. 433MHz remote control circuit; 225. Motor drive circuit; 230. Storage circuit; 240. RTC clock circuit. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below with reference to the accompanying drawings.

[0031] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0032] This embodiment relates to a power supply link for a low-power parking lock, which is applied to the power supply of the parking lock. It can reduce the operating power consumption of the parking lock, facilitate long-term operation of the parking lock, reduce the frequency of battery charging and replacement, and reduce operating costs.

[0033] Reference Figure 1 As shown, the power supply link 100 of the low-power parking lock includes a power interface 110 , a battery module 120 , a core power supply module 130 and a non-core power supply module 140 .

[0034] The power interface 110 is used to receive an external power source, which may be a DC power source, a DC power source from a solar panel, or other renewable energy sources.

[0035] The battery module 120 is connected to the power interface 100 and is used to store energy from an external power source and to power the low-power parking lock when no external power source is available. The battery module 120 contains a rechargeable battery, which can be a lithium-ion battery, a lithium iron phosphate battery, a lead-acid battery, or a nickel-cadmium battery.

[0036] The core power supply module 130 connects to the power interface 110 and the battery module 120 and is used to directly power the low-power parking lock's main control circuit 210. The low-power parking lock's main control circuit 210 is the control core of the low-power parking lock and includes a control chip and peripheral circuits, which are powered by the core power supply module 130. The core power supply module 130 includes a DC / DC converter unit that converts external power to a voltage suitable for the main control circuit 210.

[0037] In some embodiments, the core power supply module 130 also powers the FLASH storage circuit 230 and the RTC clock circuit 240 in the control circuit of the low-power parking lock. The FLASH storage circuit 230 provides program storage for the main control circuit 210, and the RTC clock circuit 240 provides power for the scheduled sleep and wake-up timing of the main control circuit 210. These two circuits also need to maintain power, so they are powered by the core power supply module 130.

[0038] The non-core power supply module 140 is connected to the power interface 110 and the battery module 120 , and is used to supply power to the functional circuit 220 of the low-power parking lock according to the control of the main control circuit 210 of the low-power parking lock.

[0039] To reduce operating power consumption, the control chip of the main control circuit 210 can set its own sleep and wake-up times, or it can be scheduled by the RTC clock circuit 240. During the sleep period, the control chip can send a control signal to the non-core power supply module 140 to cut off power to the low-power parking lock functional circuit 220.

[0040] Reference Figure 2The functional circuit 220 of the low-power parking lock includes one or more of an ultrasonic circuit 221, a position detection circuit 222, a Bluetooth remote control circuit 223, a 433MHz remote control circuit 224, and a motor drive circuit 225. The non-core power supply module includes multiple power supply control units, each of which is used to control the power supply of each functional circuit of the low-power parking lock. As an example, Figure 2 In the figure, the first power supply control unit 141 supplies power to the ultrasonic circuit 221, the second power supply control unit 142 supplies power to the position detection circuit 222, the third power supply control unit 143 supplies power to the Bluetooth remote control circuit 223, the fourth power supply control unit 144 supplies power to the 433MHz remote control circuit 224, and the fifth power supply control unit 145 supplies power to the motor drive circuit 225.

[0041] Reference Figure 3 The power supply control unit in the non-core power supply module 140 includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5. The source of the first switch tube Q1 serves as the positive power input terminal VCC_SYS to receive the front-end power input and is grounded through the first capacitor C1. A first resistor R1 and a second capacitor C2 are connected in parallel between the source and gate of the first switch tube Q1. The gate of the first switch tube Q1 is connected to the drain of the second switch tube Q2 through the second resistor R2. The gate of the first switch tube Q1 is connected to the drain of the second switch tube Q2. The gate of the first switching tube Q1 is connected to the gate of the third switching tube Q3 through a third resistor R3. The drain of the first switching tube Q1 serves as the positive power supply output terminal VCC_USS to provide power to the back end and is connected to the drain of the third switching tube Q3 through a fourth resistor R4. A fourth capacitor C4 and a fifth capacitor C5 are connected in parallel between the drain of the first switching tube Q1 and ground. The gate of the second switching tube Q2 is connected to the main control circuit control terminal PW_EN of the low-power parking lock through a fifth resistor R5. The source of the second switching tube Q2 is grounded. A sixth resistor R6 and a third capacitor C3 are connected in parallel between the gate and source of the second switching tube Q2. The source of the third switching tube Q3 is grounded. The first switching tube Q1 is a PMOS tube, and the second switching tube Q2 and the third switching tube Q3 are both NMOS tubes.

[0042] When a high-level signal is input to the control terminal PW_EN of the low-power parking lock's main control circuit, the second switch Q2 turns on. The voltage difference between the source and gate of the first switch Q1 exceeds the turn-on voltage, turning on the first switch Q1 and enabling power to be supplied to other functional modules of the low-power parking lock via the power control unit. At this point, the voltage difference between the gate and source of the third switch Q3 is insufficient to reach the turn-on voltage, turning off the third switch Q3. The first, second, and third capacitors C1, C2, and C3 in the circuit filter out interference, the fourth and fifth capacitors C4 and C5 provide voltage regulation, and the first, second, third, third, and sixth resistors R1, R2, R3, R5, and R6 establish the turn-on voltages of each switch and limit the current in the branch circuit.

[0043] When a low-level signal is input to the control terminal PW_EN of the main control circuit of the low-power parking lock, the second switch tube Q2 is turned off, the gates of the first switch tube Q1 and the third switch tube Q3 are both at a high level, the first switch tube Q1 is turned off, and the power supply control unit stops supplying power to other functional modules of the low-power parking lock. At this time, the third switch tube Q3 is turned on, and the charges in the fourth capacitor C4 and the fifth capacitor C5 can be quickly discharged through the fourth resistor R4, causing the functional modules connected to the back end to quickly lose power and enter the shutdown state, thereby reducing the overall power consumption of the parking lock.

[0044] When the parking lock is in standby mode, the current consumed is only at the microampere level. The power-on and power-off links on each module of the parking lock can reasonably cut off the power supply of the module when the module is in standby mode, while retaining the power supply of the main control part. When the main control is in sleep mode, it can also reduce its own power consumption, achieving the purpose of low-power design of the equipment.

[0045] Reference Figure 4 The power supply control unit further includes a step-down circuit connected to the drain of the first switch tube Q1. The step-down circuit adjusts the external power supply to a voltage suitable for each functional circuit.

[0046] Reference Figure 5The buck circuit includes a buck chip U1, an inductor L1, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a sixth capacitor C6, and a seventh capacitor C7. The input terminal VIN of the buck chip U1 is connected to the upper power supply input terminal VCC_USS. The voltage between the upper power supply input terminal VCC_USS and ground is divided by the seventh resistor R7 and the eighth resistor R8, and the voltage is input to the enable terminal EN of the buck chip U1. The sixth capacitor C6 is connected in parallel between the bootstrap terminal BST and the switch terminal SW of the buck chip U1. The switch terminal SW of the buck chip U1 is connected to the first terminal of the inductor L1. The second terminal of the inductor L1 serves as the output terminal VCC_OUT. The voltage between the output terminal VCC_OUT and ground is divided by the ninth resistor R9 and the tenth resistor R10, and the voltage is input to the feedback terminal FB of the buck chip U1. A seventh capacitor C7 is connected in parallel between the output terminal VCC_OUT and the feedback terminal FB of the buck chip U1.

[0047] The model of the step-down chip U1 may be BL8033, or other models of chips with similar functions.

[0048] The battery module 120 includes a battery power detection unit for detecting the power level of the batteries in the battery module and transmitting the detected power level to the main control circuit 210 of the low-power parking lock.

[0049] For example, refer to Figure 6 The battery power detection unit includes an eleventh resistor R11 and a twelfth resistor R12. The eleventh resistor R11 and the twelfth resistor R12 are connected between the positive terminal VBAT of the battery and the ground to form a voltage divider, and are connected to the battery voltage detection terminal BAT_TDST of the main control circuit 210 of the low-power parking lock. The battery voltage detection terminal BAT_TDST can be connected to the control chip through an A / D converter, or directly connected to the A / D conversion port of the control chip. The control chip can obtain the battery power through the detected battery voltage and further report it to the control platform; when the battery power of the device drops to a critical value, the device can report a low battery signal to inform the administrator to replace the battery or charge it in time.

[0050] This embodiment also relates to a low-power parking lock, which includes a main control circuit, a functional module, and a power supply link of the low-power parking lock involved in the above embodiment.

[0051] This utility model discloses a low-power power supply link for a parking lock. Currently, low-power design for parking locks is crucial for improving their efficiency and reliability, especially when they require long-term operation and battery power. This plays a crucial role in extending the service life and charging and battery replacement cycles of parking locks. This utility model utilizes an effective power management system to maximize battery life and reduce external power consumption. The module's intelligent sleep mode effectively reduces device power consumption, and combined with circuit thermal resistance management, achieves the desired low-power design.

[0052] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A power supply link for a low-power parking lock, characterized in that: include: Power interface, used to receive external power; A battery module connected to the power interface, used to store electrical energy from an external power source and to power the low-power parking lock when no external power source is available; The core power supply module is connected to the power interface and the battery module to directly power the main control circuit of the low-power parking lock; The non-core power supply module is connected to the power interface and the battery module, and is used to supply power to the functional circuit of the low-power parking lock according to the control of the main control circuit of the low-power parking lock.

2. A power supply link for a low-power parking lock according to claim 1, characterized in that: The core power supply module is also used to supply power to the FLASH storage circuit and RTC clock circuit of the low-power parking lock.

3. A power supply link for a low-power parking lock according to claim 1, characterized in that: The functional circuits of the low-power parking lock include one or more of an ultrasonic circuit, a position detection circuit, a Bluetooth remote control circuit, a 433MHz remote control circuit, and a motor drive circuit; the non-core power supply module includes multiple power supply control units, which are used to control the power supply of each functional circuit of the low-power parking lock.

4. A power supply link for a low-power parking lock according to claim 3, characterized in that: The power supply control unit includes a first switching transistor, a second switching transistor, a third switching transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor. The source of the first switching transistor serves as a positive power input terminal to receive a front-end power input and is grounded through the first capacitor. The first resistor and the second capacitor are connected in parallel between the source and the gate of the first switching transistor. The gate of the first switching transistor is connected to the drain of the second switching transistor via the second resistor. The gate of the first switching transistor is connected to the gate of the third switching transistor via the third resistor. The drain of the first switching transistor serves as a positive power output terminal to provide power to the back-end and is connected to the drain of the third switching transistor via the fourth resistor. The fourth capacitor and the fifth capacitor are connected in parallel between the drain of the first switching transistor and ground. The gate of the second switching transistor is connected to a control terminal of a main control circuit of a low-power parking lock via the fifth resistor. The source of the second switching transistor is grounded. The sixth resistor and the third capacitor are connected in parallel between the gate and the source of the second switching transistor. The source of the third switching transistor is grounded. The first switching transistor is a PMOS transistor, and both the second and third switching transistors are NMOS transistors.

5. A power supply link for a low-power parking lock according to claim 4, characterized in that: The power supply control unit further includes a step-down circuit connected to the drain of the first switch tube.

6. A power supply link for a low-power parking lock according to claim 5, characterized in that: The step-down circuit includes a step-down chip, an inductor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a sixth capacitor, and a seventh capacitor. The input end of the step-down chip is connected to the upper power supply input end, the voltage between the upper power supply input end and the ground is divided by the seventh resistor and the eighth resistor and input to the enable end of the step-down chip, the sixth capacitor is connected in parallel between the bootstrap end and the switch end of the step-down chip, the switch end of the step-down chip is connected to the first end of the inductor, the second end of the inductor serves as the output end, the voltage between the output end and the ground is divided by the ninth resistor and the tenth resistor and input to the feedback end of the step-down chip, and a seventh capacitor is connected in parallel between the output end and the feedback end of the step-down chip.

7. A power supply link for a low-power parking lock according to claim 1, characterized in that: The battery module includes a battery power detection unit for detecting the power level of the battery in the battery module and transmitting the power level to the main control circuit of the low-power parking lock.

8. A low-power parking lock, characterized in that: The invention comprises a main control circuit, a functional module and a power supply link of a low-power parking lock according to any one of claims 1 to 7.

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