CN-121996024-A - Clock circuit, electronic equipment and energy management system

CN121996024ACN 121996024 ACN121996024 ACN 121996024ACN-121996024-A

Abstract

The embodiment of the application provides a clock circuit, electronic equipment and an energy management system, wherein a first power supply voltage signal provided by a power supply circuit can charge an energy storage circuit, the voltage value exceeds the working voltage applied by a communication bus, so that the power supply time of the energy storage circuit to a clock generation circuit is prolonged after the clock circuit is powered down, the standby time of the clock circuit is prolonged, and a voltage conversion circuit is further arranged to adjust the power supply voltage of the clock generation circuit or the voltage value of an output clock signal, so that the signal level of communication between controllers electrically connected with the clock circuit can be accurately identified when the clock circuit works normally, and reliable communication is ensured.

Inventors

LI LIANG
XIE RONGSHENG
ZHANG HAIJUN

Assignees

维谛技术有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (11)

1. A clock circuit, comprising: the power supply circuit is used for outputting a first power supply voltage signal when the clock circuit is powered on; the power end of the energy storage circuit is electrically connected with the output end of the power supply circuit and is used for charging based on the first power supply voltage signal; The voltage conversion circuit is coupled with the power supply circuit and is used for controlling the voltage value of the first end of the voltage conversion circuit to be in the working clamping voltage range when the clock circuit is powered on; The communication end of the clock generation circuit is electrically connected with the controller through a communication bus and is used for timing after the power-on of the power supply end of the clock generation circuit; When the power-on voltage of the power supply end is in the working clamp voltage range, the high level of a communication signal transmitted between the clock generating circuit and the controller is in the working voltage range of the communication bus application, and the voltage value of the first power supply voltage signal is larger than the working voltage; the power supply end of the energy storage circuit is coupled with the first end of the voltage conversion circuit and is used for supplying power to the clock generation circuit when an external power supply of the clock circuit is powered off.
2. The clock circuit of claim 1, wherein the power supply circuit comprises a first diode and a second current limiting resistor; The anode of the first diode is electrically connected with the output end of the second power supply circuit, and the cathode of the first diode is electrically connected with the power supply end of the energy storage circuit through the second current limiting resistor; or the anode of the first diode is electrically connected with the output end of the second power supply circuit through the second current limiting resistor, and the cathode of the first diode is electrically connected with the power supply end of the energy storage circuit; The second power supply circuit is used for outputting a second power supply voltage signal; The first diode is used for being conducted when the second power supply circuit is electrified, so that the second power supply voltage signal is obtained, and the first power supply voltage signal is output; the first diode is also used for being reversely cut off when the second power supply circuit is powered down.
3. A clock circuit as claimed in claim 1 or 2, wherein the voltage conversion circuit comprises a controllable switching device; the first end of the controllable switch device is electrically connected with the power end of the first power circuit, and the second end of the controllable switch device is used as the first end of the voltage conversion circuit; The controllable switching device is used for controlling the voltage value of the second end of the controllable switching device to be smaller than or equal to the maximum value of the working clamping voltage range based on the voltage value of the third power supply voltage signal provided by the first power supply circuit when the second end of the controllable switching device obtains the first power supply voltage signal.
4. A clock circuit as claimed in claim 3, wherein the controllable switching device is further configured to output an operating voltage signal when the third supply voltage signal is obtained at a first terminal thereof and the first supply voltage signal is not obtained at a second terminal thereof, the operating voltage signal having a voltage value that is a minimum value of the operating clamp voltage range.
5. The clock circuit of claim 4, wherein the clock circuit comprises a first resistor; the second end of the controllable switch device is electrically connected with the second end of the first resistor, and the first end of the first resistor is electrically connected with the power supply end of the energy storage circuit; the first resistor is used for not outputting a first power supply voltage signal obtained from the first end of the first resistor from the second end of the first resistor when the voltage value of the first end of the first resistor is smaller than that of the second end of the first resistor; and transmitting the working voltage signal to the energy storage circuit to charge the energy storage circuit.
6. The clock circuit of claim 5, wherein the controllable switching device comprises a relay, an optical MOS, or an optical coupler device; The controllable switch device is also provided with a third end and a fourth end, the third end of the controllable switch device is electrically connected with the second power supply circuit, the fourth end of the controllable switch device is grounded, and when the controllable switch device is used for obtaining a second power supply voltage signal from the third end of the controllable switch device, the third end of the controllable switch device is conducted with the fourth end of the controllable switch device so as to control the first end of the controllable switch device and the second end of the controllable switch device to be conducted.
7. The clock circuit of claim 6, wherein when the controllable switching device comprises an optocoupler device, the first and second ends of the controllable switching device have unidirectional conductivity; The voltage conversion circuit further comprises a second diode; the anode of the second diode is electrically connected with the first end of the controllable switching device, the cathode of the second diode is electrically connected with the second end of the controllable switching device, and the second diode is used for limiting the voltage value of the first end of the controllable switching device to be larger than the voltage value of the second end of the controllable switching device.
8. The clock circuit of claim 1 or 2, wherein the clock circuit further comprises a filter circuit; The first end of the filter circuit is electrically connected with the power end of the energy storage circuit and the first end of the voltage conversion circuit, and the second end of the filter circuit is electrically connected with the power supply end of the clock generation circuit and is used for filtering noise of power supply electric signals of the clock generation circuit.
9. A clock circuit, comprising: the power supply circuit is used for outputting a first power supply voltage signal when the clock circuit is powered on; The power end of the energy storage circuit is electrically connected with the output end of the power supply circuit, and the energy storage circuit is used for charging based on the first power supply voltage signal when the first power supply voltage signal is obtained; Discharging when the first power supply voltage signal is not obtained; the power supply end of the clock generation circuit is electrically connected with the output end of the power supply circuit and is used for timing after the power supply end of the clock generation circuit is electrified; The input end of the voltage conversion circuit is electrically connected with the output end of the clock generation circuit, the output end of the voltage conversion circuit is electrically connected with the controller through a communication bus, and the voltage conversion circuit is used for carrying out level conversion on a first communication signal output by the clock generation circuit and outputting a second communication signal to the controller; the high level of the second communication signal is in the working voltage range of the communication bus application, and the working voltage of the communication bus application is smaller than the voltage value of the first power supply voltage signal.
10. An electronic device comprising a clock circuit as claimed in any one of claims 1-8 or a clock circuit as claimed in claim 9.
11. An energy management system comprising the electronic device of claim 10.

Description

Clock circuit, electronic equipment and energy management system Technical Field The embodiment of the application relates to the technical field of power electronics, in particular to a clock circuit, electronic equipment and an energy management system. Background The clock circuit is a circuit for generating and providing accurate and stable clock signals, and is an important circuit structure for ensuring that an energy management system accurately operates and communicates according to a preset sequence and time. In order to prevent the requirement that the clock circuit still can maintain timing after the main power supply of the circuit is powered down, the standby time needs to be set for the clock circuit, and the standby time can be set for the battery in the clock circuit, but the replacement of the disposable battery is unfavorable for maintenance, and the rechargeable battery has high cost and complex charge and discharge management, so that the super capacitor is generally arranged in the clock circuit to store the electric energy for maintaining the standby time, and the super capacitor is used for maintaining the timing operation of the clock circuit after the clock circuit is powered down. How to increase the standby time of a clock circuit including a supercapacitor is an important issue for research. Disclosure of Invention The application provides a clock circuit, electronic equipment and an energy management system, which are used for solving the technical problems. In a first aspect, an embodiment of the present application provides a clock circuit, including: the power supply circuit is used for outputting a first power supply voltage signal when the clock circuit is powered on; the power end of the energy storage circuit is electrically connected with the output end of the power supply circuit and is used for charging based on the first power supply voltage signal; The voltage conversion circuit is coupled with the power supply circuit and is used for controlling the voltage value of the first end of the voltage conversion circuit to be in the working clamping voltage range when the clock circuit is powered on; The communication end of the clock generation circuit is electrically connected with the controller through a communication bus and is used for timing after the power-on of the power supply end of the clock generation circuit; When the power-on voltage of the power supply end is in the working clamp voltage range, the high level of a communication signal transmitted between the clock generating circuit and the controller is in the working voltage range of the communication bus application, and the voltage value of the first power supply voltage signal is larger than the working voltage; the power supply end of the energy storage circuit is coupled with the first end of the voltage conversion circuit and is used for supplying power to the clock generation circuit when an external power supply of the clock circuit is powered off. In the technical scheme, when the clock circuit is electrified, the voltage value of the first end of the voltage conversion circuit is controlled to be in the working clamp voltage range, the clock generation circuit can ensure that the clock generation circuit can normally communicate with the controller based on the voltage value operation of the first end of the voltage conversion circuit, the generated communication signal can be accurately transmitted on the communication bus, the power supply circuit outputs a first power supply voltage signal when the clock circuit is electrified, the energy storage circuit can be charged, the voltage value of the first power supply voltage signal is larger than the voltage value of the working voltage signal, the maximum voltage value of the energy storage circuit is increased, the energy storage electric quantity is improved, the energy storage circuit releases stored energy after the clock circuit is powered down, the timing of the clock circuit can be maintained, and the standby time of the clock circuit is prolonged. Optionally, the power supply circuit includes a first diode and a second current limiting resistor; The anode of the first diode is electrically connected with the output end of the second power supply circuit, and the cathode of the first diode is electrically connected with the power supply end of the energy storage circuit through the second current limiting resistor; or the anode of the first diode is electrically connected with the output end of the second power supply circuit through the second current limiting resistor, and the cathode of the first diode is electrically connected with the power supply end of the energy storage circuit; The second power supply circuit is used for outputting a second power supply voltage signal; The first diode is used for being conducted when the second power supply circuit is electrified, so that the second power supply voltage signal is obtained, and th