Power supply control device and pump
By combining a CAN communication module, a central control module, and a voltage input module, the pump can quickly switch between low-power and normal operating states, solving the problems of complex pump structure and high power consumption in existing technologies, simplifying pump design, and reducing power loss.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI SHINHOO CANNED MOTOR PUMP CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-24
AI Technical Summary
Existing pumps have high power consumption and complex structure when not in operation, making it difficult to achieve fast wake-up and low-power state switching.
By combining a CAN communication module, a central control module, and a voltage input module, and using an anti-reverse switch unit and a CAN power supply switch unit, the system enables rapid switching between low-power and normal operating states, thereby reducing power loss.
It achieves low power consumption and fast wake-up function for the pump in standby mode, simplifies the pump's structural design, and reduces power loss.
Smart Images
Figure CN224555494U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pump technology, and in particular to a power supply control device and a pump. Background Technology
[0002] In the prior art, in order to achieve low power consumption when the pump is not working and to quickly wake up the pump when it needs to work, an external switching device is often added to the power input port of the pump for control. However, adding an external switching device makes the pump structure complex. Utility Model Content
[0003] One objective of this invention is to provide a power supply control device to simplify the pump structure.
[0004] To achieve the above objectives, the first aspect of this utility model provides a power supply control device, including a CAN communication module, a central control module, and a voltage input module;
[0005] The CAN communication module is signal-connected to the central control module and is used to connect to external devices, converting the control signals sent by the external devices and transmitting them to the central control module.
[0006] The voltage input module includes a reverse protection switch unit and a CAN power supply switch unit. The input terminal of the reverse protection switch unit is used to connect to an external power supply, the output terminal of the reverse protection switch unit is connected to the central control module, and the output terminal of the reverse protection switch unit is connected to the CAN communication module through the CAN power supply switch unit.
[0007] The central control module is signal-connected to the CAN power supply switch unit and is used to control the CAN power supply switch unit to be turned on, so that the power supply control device enters normal working state or to control the CAN power supply switch unit to be turned off, so that the power supply control device enters low power consumption state.
[0008] The central control module is signal-connected to the anti-reverse switch unit so that the anti-reverse switch unit is in a low current transmission state or a high current transmission state. When the anti-reverse switch unit is in the low current transmission state, the maximum current transmitted is less than the maximum current transmitted when the anti-reverse switch unit is in the high current transmission state.
[0009] Another objective of this invention is to provide a pump with a simple structure.
[0010] To achieve this objective, the second aspect of this utility model adopts the following technical solution:
[0011] A pump includes a motor and the aforementioned power supply control device connected to the motor.
[0012] As can be seen from the above, the technical solution provided by this utility model, when the CAN communication module receives the control signal (low power signal) sent by the external device, converts the level of the control signal (low power signal) and transmits it to the central control module; after the central control module receives the low power signal, the central control module itself enters the low power mode. At the same time, the central control module controls the CAN power supply switch unit to disconnect, the voltage input module is no longer the CAN communication module, the CAN communication module enters the low power mode, and the power supply control device is in a standby low power state.
[0013] The central control module controls the anti-reverse switch unit to enter a low-current transmission state, allowing only a small current to pass through the entire power supply control device, resulting in low power loss and further reduction of power loss in the entire power supply control device.
[0014] When the power supply control device is in a low-power standby state, the external power supply can provide a small current to the central control module through the reverse protection switch unit. This allows the central control module to provide a small current to the CAN communication module, enabling the CAN communication module to receive external control signals even in low-power mode. Specifically, in this embodiment, the central control module provides a milliamp-level current to the CAN communication module in the low-power state.
[0015] When the CAN communication module receives a control signal (wake-up signal) from an external device, it performs a level conversion on the control signal (wake-up signal) and transmits it to the central control module. Upon receiving the signal from the CAN communication module, the central control module controls the CAN power supply switch to turn on, enabling the power supply control device to supply power to the CAN communication module normally. Both the central control module and the CAN communication module then enter normal operating mode, completing the switch from low-power state to normal operating state.
[0016] The control signals may also include motor start and stop signals. After the CAN communication module receives the motor start or stop signal, it transmits it to the central control module. The central control module controls the anti-reverse switch unit to enter the high current transmission state (corresponding to the start signal), so that the power supply control device can supply a larger current to the motor, or the anti-reverse switch unit to enter the low current transmission state (corresponding to the stop signal), so that the power supply control device can supply a smaller current and reduce the power loss of the power supply control device.
[0017] The power supply control device provided in this embodiment is compatible with low power consumption and CAN wake-up functions, and can realize the rapid switching between the low power consumption state and the normal operation state of the pump in standby mode. Attached Figure Description
[0018] Figure 1This is a topology diagram of the power supply control device provided in this embodiment of the utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the central control module provided in this embodiment of the utility model;
[0020] Figure 3 This is a schematic diagram of the CAN communication module structure provided in this embodiment of the utility model;
[0021] Figure 4 This is a structural schematic diagram of the voltage input module provided in an embodiment of the present invention.
[0022] In the picture:
[0023] 100. First filtering unit; 200. Reverse protection switch unit; 300. CAN power supply switch unit; 400. Voltage conversion unit; 500. Second filtering unit;
[0024] J2, positive terminal of input voltage; J1, negative terminal of input voltage; VM, connector; Q1, first MOSFET; E1, first electrolytic capacitor; E2, second electrolytic capacitor; D1, first diode; D2, second diode; D14, fourteenth diode; D15, fifteenth diode;
[0025] C8, eighth capacitor; R4, fourth resistor; R11, eleventh resistor; Q5, fifth transistor; L1, first inductor; C6, sixth capacitor; C7, seventh capacitor; TVS1, first transient voltage suppressor diode; U2, power supply chip; C50, fiftieth capacitor; C51, fifty-first capacitor; C52, fifty-second capacitor; C53, fifty-third capacitor; VBW, first signal input terminal; DVCC12, second signal input terminal; D10, tenth diode; Q12, twelfth transistor; R43, forty-third resistor; R44, forty-fourth resistor; R42, forty-second resistor; R41, forty-first resistor; Q11, eleventh MOSFET;
[0026] J4, fourth signal input terminal; J5, fifth signal input terminal; D12, second transient voltage suppression diode; L8, common mode inductor; U5, CAN chip. Detailed Implementation
[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.
[0028] This utility model defines certain directional terms. Unless otherwise stated, the directional terms used, such as "up", "down", "left", "right", "inner", and "outer", are used for ease of understanding and therefore do not constitute a limitation on the scope of protection of this utility model.
[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] This embodiment provides a power supply control device for controlling a water pump to quickly switch between a low-power state and a normal operating state, thus simplifying the pump's structure. The power supply control device provided in this embodiment can be used in vehicles, etc., but is not limited to these applications.
[0032] like Figure 1 As shown, the power supply control device provided in this embodiment includes a CAN communication module, a central control module, and a voltage input module.
[0033] The CAN communication module is signal-connected to the central control module and is used to connect to external devices, transmitting control signals from these devices to the central control module after level conversion. For example, the control signals may include a low-power signal and a wake-up signal. The external device can be a host computer. Upon receiving the low-power signal, the power supply control device enters a low-power state, where both the CAN communication module and the central control module consume less power. Upon receiving the wake-up signal, the power supply control device enters a normal operating state, where both the CAN communication module and the central control module operate normally, but power consumption is higher than in the low-power state.
[0034] The voltage input module includes a reverse protection switch unit 200 and a CAN power supply switch unit 300. The input terminal of the reverse protection switch unit 200 is used to connect to an external power supply to power the power supply control device.
[0035] The output of the reverse protection switch unit 200 is electrically connected to the CAN communication module via the CAN power supply switch unit 300. The central control module is signal-connected to the CAN power supply switch unit 300 and is used to control the CAN power supply switch unit 300 to turn on, enabling the power supply control device to enter normal operation, or to control the CAN power supply switch unit 300 to turn off, enabling the power supply control device to enter a low-power state. That is, when the power supply control device enters a low-power state, the CAN power supply switch unit 300 is turned off, and the voltage input module no longer supplies power to the CAN communication module.
[0036] The output of the reverse protection switch unit 200 is connected to the central control module for power supply, thus providing power to the central control module in both low-power and normal operating states. That is, because the central control module is directly connected to the output of the reverse protection switch unit 200 instead of through the CAN power supply switch unit 300, even when the CAN power supply switch unit 300 is disconnected in low-power mode, the external power supply can still power the central control module through the reverse protection switch unit 200.
[0037] The central control module is signal-connected to the reverse-current protection switch unit 200 to enable the reverse-current protection switch unit 200 to operate in either a low-current or high-current transmission state. The maximum current transmitted by the reverse-current protection switch unit 200 in the low-current transmission state is less than the maximum current transmitted in the high-current transmission state. Specifically, when the power supply control device is in a low-power state, the reverse-current protection switch unit 200 operates in a low-current transmission state. When the power supply control device is in normal operating condition, the reverse-current protection switch unit 200 operates in either a low-current or high-current transmission state. When the power supply control device is in normal operating condition and needs to supply power to high-power equipment such as connected motors, the reverse-current protection switch unit 200 operates in a high-current transmission state.
[0038] When the CAN communication module receives a control signal (low-power signal) sent by an external device, it performs a level conversion on the control signal (low-power signal) and transmits it to the central control module. After receiving the low-power signal, the central control module enters a low-power mode. At the same time, the central control module controls the CAN power supply switch unit 300 to disconnect, the voltage input module is no longer the CAN communication module, the CAN communication module enters a low-power mode, and the power supply control device is in a standby low-power state.
[0039] After receiving the low-power signal, the central control module controls the anti-reverse switch unit 200 to enter the low-current transmission state. Only a small current is allowed to pass through the entire power supply control device, resulting in low power loss and further reduction of power loss.
[0040] When the power supply control device is in a low-power standby state, the external power supply can provide a small current to the central control module through the reverse protection switch unit 200. This allows the central control module to provide a small current to the CAN communication module, enabling the CAN communication module to receive external control signals even in low-power mode. Specifically, in this embodiment, in the low-power state, the central control module provides a milliamp-level current to the CAN communication module.
[0041] When the CAN communication module receives a control signal (wake-up signal) from an external device, it performs a level conversion on the control signal (wake-up signal) and transmits it to the central control module. Upon receiving the signal from the CAN communication module, the central control module controls the CAN power supply switch unit 300 to turn on, enabling the power supply control device to supply power to the CAN communication module normally. The central control module and the CAN communication module then enter normal operating mode, completing the switch from low-power state to normal operating state.
[0042] Control signals can also include motor start / stop signals. After receiving the motor start or stop signal, the CAN communication module transmits it to the central control module. Alternatively, the motor start or stop signal can be transmitted directly to the central control module without going through the CAN communication module. Upon receiving the start signal, the central control module controls the reverse-current protection switch 200 to enter a high-current transmission state, allowing the power supply control device to deliver a larger current to the motor. Upon receiving the stop signal, the central control module controls the reverse-current protection switch 200 to enter a low-current transmission state, allowing the power supply control device to deliver only a smaller current, thus reducing power loss in the power supply control device.
[0043] The power supply control device provided in this embodiment is compatible with low power consumption and CAN wake-up functions, and can quickly switch the pump between low power consumption and normal operation states in standby mode. It eliminates the need for external switching devices (to control the pump to enter low power consumption or normal operation states), thus simplifying the pump's structure.
[0044] like Figure 2As shown, exemplarily, the central control module includes an MCU, optionally a model FU6866Q. Pin 12 of the MCU is connected to the CAN communication module to power it in a low-power state. Pin 10 of the MCU is connected to the output of the reverse protection switch unit 200 to power the MCU and the CAN communication module in both normal and low-power states. Pins 3, 6, and 9 of the MCU are connected to the control terminal of the reverse protection switch unit 200 to control it to enter either a low-current or high-current power supply state. Pin 44 of the MCU is connected to the control terminal of the CAN power supply switch unit 300 to control it to open or close.
[0045] like Figure 3 As shown, the CAN communication module includes a CAN chip U5 and a signal input unit. The signal input unit includes a fourth signal input terminal J4 and a fifth signal input terminal J5. The CAN chip U5 can be a SIT1042. The fourth and fifth signal input terminals J4 and J5 are used to receive control signals, i.e., they are connected to external devices.
[0046] The CAN chip U5 includes a CAN signal input terminal (pins 6 and 7 of the CAN chip U5), a CAN signal output terminal (pins 1 and 4 of the CAN chip U5), a constant power input terminal (pin 3 of the CAN chip U5), and a low power input terminal (pin 5 of the CAN chip U5).
[0047] The CAN signal input terminal is connected to the signal input unit so that the CAN chip U5 can receive control signals. Specifically, pin 7 of the CAN chip U5 is connected to the fourth signal input terminal J4, and pin 6 of the CAN chip U5 is connected to the fifth signal input terminal J5.
[0048] The CAN signal output terminal is connected to the signal input terminal of the central control module. Specifically, pin 1 of CAN chip U5 is connected to pin 46 of the MCU, and pin 4 of CAN chip U5 is connected to pin 47 of the MCU to transmit control signals to the MCU.
[0049] The constant power input terminal is connected to the output terminal of the voltage conversion unit 400 of the voltage input module (described in detail below) to supply power to the CAN chip U5 under normal operating conditions. Specifically, the voltage conversion unit 400 is connected to pin 3 of the CAN chip U5.
[0050] The low-power input terminal is connected to the voltage output terminal of the central control module. Specifically, pin 12 of the MCU is connected to pin 5 of the CAN chip U5, thereby supplying power to the CAN chip U5 in low-power mode. In low-power mode, the current between pin 12 of the MCU and pin 5 of the CAN chip U5 is in the milliamp level, meaning that the current transmitted by the voltage input module is also in the milliamp level. Therefore, the power consumption of the power supply control device is very small.
[0051] In low-power mode, the central control module supplies power to the CAN chip U5, ensuring that the CAN chip U5 can receive control signals from external devices in real time. In normal operation mode, the voltage conversion unit 400 supplies power to the CAN chip U5, ensuring that the CAN chip U5 can receive control signals from external devices in real time. Therefore, whether in low-power mode or normal operation mode, the CAN chip U5 can realize real-time signal interaction between the power supply control device and external devices.
[0052] The signal input unit also includes a signal voltage regulator subunit, one end of which is connected to the fourth signal input terminal J4, and the other end is connected to the fifth signal input terminal J5. Specifically, the signal voltage regulator subunit may include a second transient voltage suppression diode D12, which can protect the CAN chip U5 from voltage spikes introduced by the fourth signal input terminal J4 and the fifth signal input terminal J5.
[0053] Optionally, the signal input unit further includes a third filtering unit, which is connected to the CAN chip U5, the fourth signal input terminal J4, and the fifth signal input terminal J5. Specifically, the third filtering unit includes a common-mode inductor L8 to perform filtering. The common-mode inductor L8 is connected to pins 7 and 6 of the CAN chip U5, as well as the fourth signal input terminal J4 and the fifth signal input terminal J5. Optionally, a signal voltage regulation subunit is located between the third filtering unit and the signal input terminals (the fourth signal input terminal J4 and the fifth signal input terminal J5).
[0054] like Figure 4 As shown, the voltage input module includes a positive input voltage terminal J2 and a negative input voltage terminal J1. The positive input voltage terminal J2 is used to connect to the positive terminal of an external power supply, and the negative input voltage terminal J1 is used to connect to the negative terminal of an external power supply. The input terminal of the reverse protection switch unit 200 is connected to the positive input voltage terminal J2.
[0055] The voltage input module also includes a voltage conversion unit 400. The output terminal of the CAN power supply switch unit 300 is connected to the input terminal of the voltage conversion unit 400. The output terminal of the voltage conversion unit 400 is connected to the CAN communication module. The voltage conversion unit 400 is used for level conversion. For example, the input terminal of the voltage conversion unit 400 receives a 12V voltage, and the output terminal of the voltage conversion unit 400 outputs a 5V voltage.
[0056] The reverse protection switch unit 200 includes a first MOSFET Q1 and a first switch control subunit. The first switch control subunit is used to control the on / off state of the first MOSFET Q1, and the central control module controls the on / off state of the first MOSFET Q1 through the first switch control subunit.
[0057] The source of the first MOSFET Q1 is connected to the positive terminal of the external power supply. Specifically, the first MOSFET Q1 is connected to the positive terminal of the external power supply through the positive terminal J2 of the input voltage. The first MOSFET Q1 is an N-channel MOSFET. The first MOSFET Q1 serves to prevent the voltage input module from being connected to the positive and negative terminals of the external power supply in reverse.
[0058] The drain of the first MOSFET Q1 is electrically connected to the input terminal of the voltage conversion unit 400 and the central control module. The gate of the first MOSFET Q1 is connected to the first switch control subunit, which is signal-connected to the central control module. The central control module controls the switching on and off of the first MOSFET Q1 through the first switch control subunit. When the first MOSFET Q1 is turned on, the reverse protection switch unit 200 is in a high-current transmission state, and a large current can pass between the source and drain of the first MOSFET Q1. When the first MOSFET Q1 is turned off, the reverse protection switch unit 200 is in a low-current transmission state, and at this time, the equivalent diode inside the first MOSFET Q1 allows a smaller current to pass between the source and drain of the first MOSFET Q1.
[0059] For example, the first switch control subunit includes a first diode D1, a second diode D2, an eighth capacitor C8, a fourth resistor R4, an eleventh resistor R11, and a fifth transistor Q5.
[0060] Specifically, the anode of the first diode D1 is connected to the central control module. More specifically, the first switch control subunit may also include a first signal input terminal VBW. The anode of the first diode D1 is connected to pin 9 of the MCU through the first signal input terminal VBW, thereby allowing the MCU to send a signal to the first switch control subunit. The cathode of the first diode D1 is connected to one end of the fourth resistor R4 and one end of the eighth capacitor C8, respectively. The other end of the fourth resistor R4 is connected to the collector of the fifth transistor Q5 and the gate of the first MOSFET Q1. The other end of the eighth capacitor C8 is connected to the base of the fifth transistor Q5. One end of the eleventh resistor R11 is connected to the base of the fifth transistor Q5, and the other end is connected to the negative terminal of the external power supply through the negative input voltage terminal J1. The emitter of the fifth transistor Q5 is connected to the anode of the second diode D2, and the collector of the fifth transistor Q5 is connected to the gate of the first MOSFET Q1. The cathode of the second diode D2 is connected to the source of the first MOSFET Q1.
[0061] Optionally, the first switch control subunit may further include a fourteenth diode D14. The anode of the fourteenth diode D14 is connected to pin 6 of the MCU, and the cathode is connected to one end of the fourth resistor R4 and one end of the eighth capacitor C8, respectively. The fourteenth diode D14 serves as a redundant component to prevent the first diode D1 from failing.
[0062] Optionally, the first switch control subunit may further include a fifteenth diode D15. The anode of the fifteenth diode D15 is connected to pin 3 of the MCU, and the cathode is connected to one end of the fourth resistor R4 and one end of the eighth capacitor C8, respectively. The fifteenth diode D15 serves as a redundant component to prevent the first diode D1 and the fourteenth diode D14 from failing.
[0063] It is understandable that the input terminal of the anti-reverse switch unit 200 is the source of the first MOSFET Q1, the output terminal is the drain of the first MOSFET Q1, and the control terminal is the anode of the first diode D1, the anode of the fourteenth diode D14, or the anode of the fifteenth diode D15.
[0064] For example, the CAN power supply switching unit 300 includes an eleventh MOSFET Q11 and a second switch control subunit. The second switch control subunit is used to control the on / off state of the eleventh MOSFET Q11, and the central control module controls the on / off state of the eleventh MOSFET Q11 through the second switch control subunit. The eleventh MOSFET Q11 is a P-channel MOSFET.
[0065] Specifically, the source of the eleventh MOSFET Q11 is connected to the output terminal of the reverse protection switch unit 200, and more specifically, the source of the eleventh MOSFET Q11 is connected to the drain of the first MOSFET D1. The drain of the eleventh MOSFET Q11 is connected to the input terminal of the voltage converter 400, and the gate of the eleventh MOSFET Q11 is connected to the second switch control subunit.
[0066] The second switch control subunit includes the second signal input terminal DVCC12, the tenth diode D10, the twelfth transistor Q12, the forty-third resistor R43, the forty-fourth resistor R44, the forty-second resistor R42, and the forty-first resistor R41.
[0067] Specifically, the second signal input terminal DVCC12 is connected to pin 44 of the MCU; the anode of the tenth diode D10 is connected to the second signal input terminal DVCC12, and the cathode is connected to one end of the forty-third resistor R43; the other end of the forty-third resistor R43 is connected to one end of the forty-fourth resistor R44 and the base of the twelfth transistor Q12; the other end of the forty-fourth resistor R44 and the emitter of the twelfth transistor Q12 are grounded; the collector of the twelfth transistor Q12 is connected to one end of the forty-second resistor R42; the other end of the forty-second resistor R42 is connected to one end of the forty-first resistor R41 and the gate of the eleventh MOSFET Q11; and the source of the eleventh MOSFET Q11 is connected to the other end of the forty-first resistor R41.
[0068] It is understandable that the input terminal of the CAN power supply switch unit 300 is the source of the eleventh MOSFET Q11, the output terminal is the drain of the eleventh MOSFET Q11, and the control terminal is the anode of the tenth diode D10.
[0069] Specifically, the voltage conversion unit 400 includes a power supply chip U2, which can be model JWQ7843-50SOTH#TR. Pin 1 of the power supply chip U2 is connected to the output terminal of the CAN power supply switch unit 300, and pin 3 of the power supply chip U2 is connected to the CAN communication module. More specifically, pin 1 of the power supply chip U2 is connected to the drain of the eleventh MOSFET Q11, and pin 3 of the power supply chip U2 is connected to pin 3 of the CAN chip U5 to supply power to the CAN chip U5. Pins 2 and 3 of the power supply chip U2 are both grounded.
[0070] The voltage conversion unit 400 may also include a 51st capacitor C51, a 50th capacitor C50, a 52nd capacitor C52, and a 53rd capacitor C53. Pin 1 of the power chip U2 is connected to one end of both the 50th capacitor C50 and the 51st capacitor C51, and pin 3 of the power chip U2 is connected to one end of both the 53rd capacitor C53 and the 52nd capacitor C52. The 50th capacitor C50, the 51st capacitor C51, the 53rd capacitor C53, and the 54th capacitor are all grounded.
[0071] A connector VM is provided between the input terminal of the CAN power supply switch unit 300 and the output terminal of the reverse protection switch unit 200. The central control module is connected to the connector VM, thereby supplying power to the central control module through the connector VM. Specifically, the connector VM is connected to pin 10 of the MCU.
[0072] The voltage input module may also include a first filter unit 100, which is connected between the positive and negative terminals of the external power supply. Specifically, the first filter unit 100 is connected to the positive terminal of the external power supply through the positive terminal J2 of the input voltage and to the negative terminal of the external power supply through the negative terminal J1 of the input voltage.
[0073] For example, the first filter unit 100 includes at least one capacitor and a first inductor L1. One end of the capacitor is connected to the positive terminal J2 of the input voltage, and the other end is connected to the negative terminal J1 of the input voltage. One end of the first inductor L1 is connected to the positive terminal J2 of the input voltage, and the other end is connected to the reverse protection switch unit 200. Specifically, the other end of the first inductor L1 is connected to the source of the first MOSFET Q1. Preferably, the first filter unit 100 has two capacitors, including a sixth capacitor C6 and a seventh capacitor C7.
[0074] Optionally, the first filter unit 100 may further include a first transient voltage suppression diode TVS1, wherein the anode of the first transient voltage suppression diode TVS1 is connected to the negative terminal J1 of the input voltage, and the cathode is connected to the positive terminal J2 of the input voltage.
[0075] The voltage input module also includes a second filter unit 500, which is connected between the positive and negative terminals of the external power supply and is located between the reverse protection switch unit 200 and the voltage conversion unit 400.
[0076] For example, the second filter unit 500 includes an electrolytic capacitor bank. The positive terminal of the electrolytic capacitor bank is connected to the drain of the first MOSFET Q1 and the input terminal of the CAN power supply switch unit 300, respectively, and the negative terminal of the electrolytic capacitor bank is connected to the negative terminal J1 of the input voltage.
[0077] Optionally, the electrolytic capacitor bank includes a first electrolytic capacitor E1 and a second electrolytic capacitor E2 connected in parallel. The number of electrolytic capacitors is not limited to this; it can be less than two or more, depending on the design requirements.
[0078] When the power supply control device is in a low-power state, the MCU continuously supplies power to the CAN chip U5. When an external device inputs a wake-up signal to the fourth signal input terminal J4 and the fifth signal input terminal J5, the wake-up signal undergoes level conversion through the CAN chip U5 and is transmitted to the central control module (MCU) through the CAN chip U5. The central control module inputs a control signal to the second signal input terminal DVCC12 to control the eleventh MOSFET Q11 to conduct. The voltage input module supplies power to the central control module through the connector VM, and the voltage input module supplies power to the CAN chip U5 through pin 3 of the power chip U2. The central control module and the CAN communication module work normally.
[0079] When high-power electrical equipment such as motors connected to the power supply control device consumes electricity, the central control module inputs a control signal to the first signal input terminal VBW, and the first MOSFET Q1 is turned on, so that the voltage input module can deliver a large current. The voltage input module supplies power to high-power electrical equipment such as motors through the connector VM.
[0080] When an external device inputs a low-power signal to the fourth signal input terminal J4 and the fifth signal input terminal J5, the low-power signal undergoes level conversion through the CAN chip U5 and is transmitted to the central control module (MCU) through the CAN chip U5. The central control module inputs control signals to the first signal input terminal VBW and the second signal input terminal DVCC12. The first MOSFET Q1 is turned off and the eleventh MOSFET Q11 is turned off. The voltage input module no longer supplies power to the CAN communication module, and the power supply control device enters a low-power state.
[0081] like Figure 1 As shown, this embodiment also provides a pump, which includes a motor and the aforementioned power supply control device. The power supply control device is connected to the motor to supply power to the motor. This embodiment provides a pump capable of quickly switching between a low-power standby state and a normal operating state.
[0082] like Figure 1 and combined Figure 4 The pump also includes a three-phase full-bridge MOS circuit. The input terminal of the three-phase full-bridge MOS circuit is connected to connector VM, and the output terminal is connected to the motor, thereby supplying power to both the three-phase full-bridge MOS circuit and the motor through connector VM. The three-phase full-bridge MOS circuit is existing technology and will not be described in detail here.
[0083] Although the present invention has been described in detail above with general descriptions, specific embodiments, and experiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. A power supply control device, characterized in that, Includes a CAN communication module, a central control module, and a voltage input module; The CAN communication module is signal-connected to the central control module and is used to connect to external devices, converting the control signals sent by the external devices and transmitting them to the central control module. The voltage input module includes a reverse protection switch unit (200) and a CAN power supply switch unit (300). The input terminal of the reverse protection switch unit (200) is used to connect to an external power supply. The output terminal of the reverse protection switch unit (200) is connected to the central control module for power transmission. The output terminal of the reverse protection switch unit (200) is connected to the CAN communication module for power transmission through the CAN power supply switch unit (300). The central control module is signal-connected to the CAN power supply switch unit (300) and is used to control the CAN power supply switch unit (300) to be turned on, so that the power supply control device enters normal working state or to control the CAN power supply switch unit (300) to be turned off, so that the power supply control device enters low power consumption state. The central control module is signal-connected to the anti-reverse switch unit (200) so that the anti-reverse switch unit (200) is in a low current transmission state or a high current transmission state. The maximum current transmitted by the anti-reverse switch unit (200) when it is in the low current transmission state is less than the maximum current transmitted by the anti-reverse switch unit (200) when it is in the high current transmission state.
2. The power supply control device according to claim 1, characterized in that, The voltage input module further includes a voltage conversion unit (400), the output terminal of the CAN power supply switch unit (300) is connected to the input terminal of the voltage conversion unit (400), and the output terminal of the voltage conversion unit (400) is connected to the CAN communication module for power transmission.
3. The power supply control device according to claim 2, characterized in that, The anti-reverse switch unit (200) includes a first MOSFET (Q1) and a first switch control subunit; The source of the first MOSFET (Q1) is connected to the positive terminal of the external power supply. The drain of the first MOSFET (Q1) is electrically connected to the input terminal of the voltage conversion unit (400) and the central control module. The gate of the first MOSFET (Q1) is connected to the first switch control subunit. The first switch control subunit is signal-connected to the central control module. The central control module controls the switching on and off of the first MOSFET (Q1) through the first switch control subunit.
4. The power supply control device according to claim 3, characterized in that, The first switch control subunit includes a first diode (D1), a second diode (D2), an eighth capacitor (C8), a fourth resistor (R4), an eleventh resistor (R11), and a fifth transistor (Q5); The anode of the first diode (D1) is connected to the central control module, and the cathode of the first diode (D1) is connected to one end of the fourth resistor (R4) and one end of the eighth capacitor (C8), respectively. The other end of the fourth resistor (R4) is connected to the collector of the fifth transistor (Q5) and the gate of the first MOSFET (Q1). The other end of the eighth capacitor (C8) is connected to the base of the fifth transistor (Q5). One end of the eleventh resistor (R11) is connected to the base of the fifth transistor (Q5), and the other end is connected to the negative terminal of the external power supply. The emitter of the fifth transistor (Q5) is connected to the anode of the second diode (D2), and the collector of the fifth transistor (Q5) is connected to the gate of the first MOSFET (Q1). The cathode of the second diode (D2) is connected to the source of the first MOSFET (Q1).
5. The power supply control device according to claim 2, characterized in that, The voltage input module further includes a first filter unit (100), which is connected between the positive and negative terminals of the external power supply and is connected to the input terminal of the anti-reverse switch unit (200).
6. The power supply control device according to claim 5, characterized in that, The voltage input module further includes a second filtering unit (500), which is connected between the positive and negative terminals of the external power supply and is located between the anti-reverse switch unit (200) and the voltage conversion unit (400).
7. The power supply control device according to claim 3, characterized in that, The CAN communication module includes a CAN chip (U5) and a signal input unit, the signal input unit including a fourth signal input terminal (J4) and a fifth signal input terminal (J5); The CAN chip (U5) includes a CAN signal input terminal, a CAN signal output terminal, a constant power input terminal, and a low power input terminal; the CAN signal input terminal is connected to the signal input unit; the CAN signal output terminal is connected to the signal input terminal of the central control module; the low power input terminal is connected to the voltage output terminal of the central control module; and the constant power input terminal is connected to the output terminal of the voltage conversion unit (400).
8. The power supply control device according to claim 7, characterized in that, The signal input unit further includes a signal voltage regulator subunit, one end of which is connected to the fourth signal input terminal (J4), and the other end is connected to the fifth signal input terminal (J5); and / or The signal input unit further includes a third filtering unit connected to the CAN chip (U5), as well as the fourth signal input terminal (J4) and the fifth signal input terminal (J5).
9. A pump, characterized in that, The device includes a motor and a power supply control device according to any one of claims 1-8 connected to the motor.
10. The pump according to claim 9, characterized in that, The power supply control device also includes a three-phase full-bridge MOS circuit, the input terminal of which is connected to the output terminal of the anti-reverse switch unit (200), and the output terminal of which is connected to the motor.