Water power equipment and charging circuit thereof

Abstract

The utility model provides an overwater power device and a charging circuit thereof, the charging circuit comprises a charging interface, a switch circuit and a master control circuit, during charging, the switch circuit is triggered to be conducted and charges a battery module in the overwater power device, the master control circuit communicates with the battery module and obtains the charging state of the battery module, and the charging interface is connected with the master control circuit. When the charging interface and the charger are disconnected or the battery module is not charged in a full-charge state, the main control circuit controls the switching circuit to be switched off, the charging interface is not electrified, the electrochemical corrosion problem cannot occur between the charging interface and seawater, and the charging interface of the charging circuit is protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of water power equipment, and in particular relates to water power equipment and a charging circuit thereof. Background Art

[0002] Water power equipment refers to a device with a power device that can move in the corresponding waters for rescue, transportation, etc. For example, a powered life buoy can be remotely controlled to reach the location of the person who has fallen into the water for rescue.

[0003] The water power equipment generally includes a driving component and a battery module for supplying power to the driving component, and a charging circuit for charging the battery module, wherein the charging circuit is provided with a charging interface.

[0004] Since water power equipment is used in water areas, there is a risk of the charging interface coming into contact with water. In particular, when the charging interface is energized, there is an electrochemical corrosion problem between the positive and negative terminals of the charging interface and the water in the water area. Utility Model Content

[0005] The utility model aims to provide a charging circuit for water power equipment, aiming to solve the problem of electrochemical corrosion of the charging interface of the charging circuit of traditional water power equipment.

[0006] The first aspect of the embodiment of the utility model provides a charging circuit for a water power device, comprising:

[0007] Charging port, used to connect the charger;

[0008] A switch circuit is connected to the charging interface and a battery module of the water power equipment, wherein the switch circuit is triggered to turn on when the charging interface is powered on, and is triggered to turn off by a shutdown signal;

[0009] A main control circuit is connected to the battery module and the switch circuit. The main control circuit is used to communicate with the battery module and obtain the charging status of the battery module, and trigger the output of the shutdown signal when the battery module is not charged.

[0010] Optionally, the switch circuit includes:

[0011] A relay, wherein the contacts of the relay are connected between the charging interface and the battery module;

[0012] A relay drive circuit, wherein the relay drive circuit is respectively connected to the charging interface, the main control circuit and the coil of the relay. When the charging interface is powered on, the relay drive circuit triggers the coil of the relay to be energized and closes the contacts of the relay, and is triggered by the shutdown signal to cut off the output power signal to the coil of the relay.

[0013] Optionally, the charging interface includes a positive terminal and a negative terminal, and the relay includes a first relay and a second relay;

[0014] The first end of the contact of the first relay is connected to the positive terminal, the first end of the contact of the second relay is connected to the negative terminal, the second end of the contact of the first relay and the second end of the contact of the second relay constitute the output end of the switching circuit, and the coil of the first relay and the coil of the second relay are respectively connected to the relay driving circuit.

[0015] Optionally, the relay drive circuit includes an electronic switch tube, a first diode, a second diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a capacitor and an optical coupler;

[0016] The first end of the electronic switch tube, the first end of the first resistor, the collector of the optocoupler, and the first end of the contact of the first relay are connected to the positive terminal; the control end of the electronic switch tube, the second end of the first resistor, the first end of the second resistor and the emitter of the optocoupler are connected; the second end of the second resistor, the anode of the first diode, the anode of the second diode, the first end of the coil of the first relay, the first end of the coil of the second relay, and the first end of the contact of the second relay are connected to the negative terminal; the second end of the electronic switch tube, the first end of the third resistor and the first end of the capacitor are connected; the second end of the third resistor, the second end of the capacitor, the cathode of the first diode, the cathode of the second diode, the second end of the coil of the first relay, and the second end of the coil of the second relay are connected; the anode of the optocoupler is connected to the positive power supply end, the cathode of the optocoupler is connected to the fourth resistor, and the second end of the fourth resistor is connected to the main control circuit.

[0017] Optionally, the contacts of the first relay include a first moving contact, a first stationary contact and a second stationary contact, and the contacts of the second relay include a second moving contact, a third stationary contact and a fourth stationary contact;

[0018] The first moving contact constitutes a first end of a contact of the first relay, the first static contact constitutes a second end of a contact of the first relay, the second moving contact constitutes a first end of a contact of the second relay, and the third static contact constitutes a second end of a contact of the first relay;

[0019] The switch circuit further includes a fifth resistor;

[0020] The fifth resistor is connected between the second stationary contact and the fourth stationary contact.

[0021] Optionally, the battery module includes a battery and a battery management circuit, and the battery management circuit is connected to the switch circuit and the battery respectively;

[0022] The main control circuit comprises:

[0023] A communication circuit connected to the battery management circuit;

[0024] A main controller is connected to the switch circuit and the communication circuit. The main controller is used to communicate with the battery management circuit through the communication circuit, obtain the charging status of the battery, and trigger the output of the shutdown signal to the switch circuit when the battery is not charged.

[0025] Optionally, the charging circuit of the water power equipment further includes:

[0026] The power conversion circuit is connected to the main control circuit and the battery module, and is used to convert the power signal output by the battery module into working power and output it to the main control circuit.

[0027] Optionally, the power conversion circuit includes a DC / DC conversion chip, a power input end of the DC / DC conversion chip is connected to the battery module, and a power output end of the DC / DC conversion chip is connected to the main control circuit.

[0028] Optionally, the positive terminal and the negative terminal are metal probes.

[0029] A second aspect of the embodiment of the utility model provides a water power device, including a battery module and a charging circuit for the water power device as described above;

[0030] The battery module is connected to the charging circuit of the water power equipment.

[0031] Compared with the prior art, the beneficial effects of the embodiments of the utility model are as follows: the charging circuit of the above-mentioned water power equipment includes a charging interface, a switch circuit and a main control circuit. During charging, the switch circuit is triggered to be turned on, and the battery module in the water power equipment is charged. The main control circuit communicates with the battery module and obtains the charging status of the battery module. When the charging interface is disconnected from the charger or the battery module is fully charged but not charged, the main control circuit controls the switch circuit to be turned off, the charging interface is not energized, and electrochemical corrosion problems will not occur between the charging interface and seawater, thereby protecting the charging interface of the charging circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the first structure of the water power equipment provided by the embodiment of the utility model;

[0033] Figure 2 A second structural schematic diagram of the water power equipment provided by the embodiment of the utility model;

[0034] Figure 3 A circuit diagram of a switch circuit provided in an embodiment of the utility model;

[0035] Figure 4 A third structural schematic diagram of the water power equipment provided by the embodiment of the utility model;

[0036] Figure 5 A fourth structural schematic diagram of the water power equipment provided by the embodiment of the utility model;

[0037] Figure 6 A fifth structural schematic diagram of the water power equipment provided by the embodiment of the utility model;

[0038] Figure 7 A schematic diagram of the structure of a charger and a charging interface provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] The first aspect of an embodiment of the utility model proposes a charging circuit 110 of a water power device 100, and the charging circuit 110 is used to charge a battery module 120 in the water power device 100. The battery module 120 includes a battery 122 and a battery management circuit 121 connected to the battery 122. The battery management circuit 121 is used to manage the charging and discharging of the battery 122 to output the corresponding driving power to the driving parts in the water power device 100, and to feedback the charging status of the battery 122 to the corresponding control module, so as to realize the status monitoring of the battery 122.

[0042] The charging interface 10 generally includes a positive terminal and a negative terminal, and the positive terminal and the negative terminal are generally made of metal, such as a contact, a probe, etc. When the charging interface 10 is charged, and because it is in contact with seawater during use, the positive terminal of the charging interface 10 is corroded by the seawater because of the positive charge, while the negative terminal is protected because of the negative charge.

[0043] In order to prevent the charging circuit 110 from being corroded when the charging interface 10 is charged and in contact with water in the water area when the charging circuit 110 is not charged, the charging interface 10 may be abnormal. Figure 1 As shown, in this embodiment, the charging circuit 110 includes:

[0044] A charging interface 10, used for connecting a charger 200;

[0045] The switch circuit 20 is connected to the charging interface 10 and the battery module 120 of the water power equipment 100. The switch circuit 20 is triggered to turn on when the charging interface 10 is powered on, and is triggered to turn off by a shutdown signal;

[0046] The main control circuit 30 is connected to the battery module 120 and the switch circuit 20. The main control circuit 30 is used to communicate with the battery module 120 and obtain the charging status of the battery module 120, and trigger an output shutdown signal when the battery module 120 is not charged.

[0047] In this embodiment, during normal charging, the charging interface 10 is connected to the charger 200, the charger 200 outputs charging power to the charging interface 10, the charging interface 10 is powered on and outputs charging power to the input end of the switching circuit 20, the switching circuit 20 is triggered to turn on, the charging power is output to the battery module 120, and the battery module 120 is charged.

[0048] At the same time, the main control circuit 30 communicates with the battery management circuit 121 of the battery module 120 and obtains the charging status of the battery 122. When the charger 200 is disconnected from the charging interface 10, or the battery 122 is fully charged, the battery 122 stops charging, that is, when the battery 122 is in an uncharged state, the main control circuit 30 outputs a shutdown signal to the switch circuit 20, the switch circuit 20 is turned off, the connection between the charging interface 10 and the battery module 120 is disconnected, and the charging interface 10 is not charged. Therefore, when the water power equipment 100 is in use, even if it comes into contact with seawater, the positive terminal will not be corroded because the positive terminal and the negative terminal are not charged, thereby realizing the anti-corrosion protection of the charging interface 10 and improving the corrosion resistance of the charging interface 10.

[0049] The switch circuit 20 may adopt a switch device with controlled on / off, such as one or more of a relay 21, a triode, a MOS tube, etc., and the specific structure is not limited.

[0050] like Figure 2 As shown, in order to improve the isolation performance of the power supply signal, in an optional embodiment, the switch circuit 20 includes:

[0051] Relay 21, the contacts of the relay 21 are connected between the charging interface 10 and the battery module 120;

[0052] The relay drive circuit 22 is connected to the charging interface 10, the main control circuit 30 and the coil of the relay 21 respectively. When the charging interface 10 is powered on, the relay drive circuit 22 triggers the coil of the relay 21 to energize, and attracts the contacts of the relay 21, and is triggered by the shutdown signal to cut off the output power signal to the coil of the relay 21.

[0053] In this embodiment, during normal charging, the charging interface 10 is connected to the charger 200, and the charger 200 outputs charging power to the charging interface 10. The charging interface 10 is powered on and outputs charging power to the first end of the contact of the relay 21 and to the relay drive circuit 22. The second end of the contact of the relay 21 is connected to the battery module 120. When receiving the charging power, the relay drive circuit 22 triggers the output power signal to the coil of the relay 21. The coil of the relay 21 is energized and the contact of the relay 21 is attracted. The relay 21 is turned on, and the charging power is output to the battery module 120 through the relay 21, and the battery module 120 is charged.

[0054] At the same time, the main control circuit 30 communicates with the battery management circuit 121 of the battery module 120 and obtains the charging status of the battery 122. When the charger 200 is disconnected from the charging interface 10, or the battery 122 is fully charged, the battery 122 stops charging, that is, when the battery 122 is in an uncharged state, the main control circuit 30 outputs a shutdown signal to the relay drive circuit 22, and the relay drive circuit 22 stops outputting a power signal to the coil of the relay 21. The contacts of the relay 21 are not attracted, the relay 21 is turned off, the charging interface 10 is disconnected from the battery module 120, and the charging interface 10 is not powered. Therefore, when the water power equipment 100 is in use, even if it comes into contact with seawater, since the positive terminal and the negative terminal are not powered, the positive terminal will not be corroded, thereby realizing the anti-corrosion protection of the charging interface 10 and improving the corrosion resistance of the charging interface 10.

[0055] Among them, one or more relays 21 can be set between the positive terminal, the negative terminal and the battery module 120. In an optional embodiment, as Figure 3 As shown, the charging interface 10 includes a positive terminal and a negative terminal, and the relay 21 includes a first relay K1 and a second relay K2;

[0056] The first end of the contact of the first relay K1 is connected to the positive terminal, the first end of the contact of the second relay K2 is connected to the negative terminal, the second end of the contact of the first relay K1 and the second end of the contact of the second relay K2 constitute the output end of the switching circuit 20, and the coil of the first relay K1 and the coil of the second relay K2 are respectively connected to the relay drive circuit 22.

[0057] In this embodiment, J0 is a charging interface 10 , which includes a positive terminal and a negative terminal packaged together. The first relay K1 is arranged between the positive terminal and the battery module, and the second relay K2 is arranged between the negative terminal and the battery module 120 .

[0058] During normal charging, the charging interface 10 is connected to the charger 200, and the charger 200 outputs charging power to the charging interface 10. The charging interface 10 is powered on and outputs charging power to the first ends of the contacts of the first relay K1 and the second relay K2 and to the relay drive circuit 22. The second ends of the contacts of the first relay K1 and the second relay K2 are connected to the battery module 120. When receiving the charging power, the relay drive circuit 22 triggers the output power signal to the coils of the first relay K1 and the second relay K2, and the first relay K1 and the second relay K2 are energized and the contacts of the first relay K1 and the second relay K2 are attracted. The first relay K1 and the second relay K2 are turned on, and the charging power is output to the battery module 120 through the first relay K1 and the second relay K2, and the battery module 120 is charged.

[0059] At the same time, the main control circuit 30 communicates with the battery management circuit 121 of the battery module 120 and obtains the charging status of the battery 122. When the charger 200 is disconnected from the charging interface 10, or the battery 122 is fully charged, the battery 122 stops charging, that is, when the battery 122 is in an uncharged state, the main control circuit 30 outputs a shutdown signal to the relay drive circuit 22, and the relay drive circuit 22 stops outputting a power signal to the coils of the first relay K1 and the second relay K2. The contacts of the first relay K1 and the second relay K2 are not attracted, the first relay K1 and the second relay K2 are turned off, the charging interface 10 is disconnected from the battery module 120, and the charging interface 10 is not charged. Therefore, when the water power equipment 100 is in use, even if it comes into contact with seawater, since the positive terminal and the negative terminal are not charged, the positive terminal will not be corroded, thereby realizing the anti-corrosion protection of the charging interface 10 and improving the corrosion resistance of the charging interface 10.

[0060] By using the first relay K1 and the second relay K2 to be respectively arranged between the positive terminal, the negative terminal and the battery module 120 , the electrical isolation impedance during shutdown is improved, and the power isolation between the charging interface 10 and the battery module 120 is enhanced.

[0061] The relay drive circuit 22 can use a corresponding coil power supply circuit, such as Figure 3 As shown, in an optional embodiment, the relay driving circuit 22 includes an electronic switch tube Q1, a first diode D1, a second diode D2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a capacitor C1 and an optical coupler U1;

[0062] The first end of the electronic switch tube Q1, the first end of the first resistor R1, the collector of the optocoupler U1, and the first end of the contact of the first relay K1 are connected to the positive terminal; the control end of the electronic switch tube Q1, the second end of the first resistor R1, the first end of the second resistor R2 and the emitter of the optocoupler U1 are connected; the second end of the second resistor R2, the anode of the first diode D1, the anode of the second diode D2, the first end of the coil of the first relay K1, the first end of the coil of the second relay K2, and the first end of the contact of the second relay K2 are connected to the negative terminal; the second end of the electronic switch tube Q1, the first end of the third resistor R3 and the first end of the capacitor C1 are connected; the second end of the third resistor R3, the second end of the capacitor C1, the cathode of the first diode D1, the cathode of the second diode D2, the second end of the coil of the first relay K1, and the second end of the coil of the second relay K2 are connected; the anode of the optocoupler U1 is connected to the positive power supply terminal; the cathode of the optocoupler U1 is connected to the fourth resistor R4; and the second end of the fourth resistor R4 is connected to the main control circuit 30.

[0063] In this embodiment, during normal charging, the charging interface 10 is connected to the charger 200, and the charger 200 outputs charging power to the charging interface 10. The charging interface 10 is powered on and outputs charging power to the first end of the contact of the relay 21 and to the electronic switch tube Q1. The electronic switch tube Q1 is triggered to turn on, and both ends of the coil of the first relay K1 and the coil of the second relay K2 are powered on. The first relay K1 and the second relay K2 attract corresponding contacts, and the first relay K1 and the second relay K2 are turned on. The charging power is output to the battery module 120 through the relay 21, and the battery module 120 is charged.

[0064] At the same time, the main control circuit 30 communicates with the battery management circuit 121 of the battery module 120 and obtains the charging status of the battery 122. When the charger 200 and the charging interface 10 are in a connected charging state, the main control circuit 30 outputs a conduction signal, the optocoupler U1 is turned off, and the electronic switch tube Q1 continues to maintain the conduction state.

[0065] When the charger 200 is disconnected from the charging interface 10, or the battery 122 is fully charged, the battery 122 stops charging, that is, when the battery 122 is in an uncharged state, the main control circuit 30 outputs a shutdown signal to the optocoupler U1, the optocoupler U1 is turned on, and the second resistor R2 is short-circuited, the electronic switch tube Q1 is turned off, the coils of the first relay K1 and the second relay K2 are powered off, the contacts of the first relay K1 and the second relay K2 are turned off, and the output of charging power to the battery module 120 is stopped, the charging interface 10 is disconnected from the battery module 120, and the charging interface 10 is not charged. Therefore, when the water power equipment 100 is in use, even if it comes into contact with seawater, since the positive terminal and the negative terminal are not charged, the positive terminal will not be corroded, thereby realizing the anti-corrosion protection of the charging interface 10 and improving the corrosion resistance of the charging interface 10.

[0066] Based on the on-off level of the electronic switch tube Q1, in an optional embodiment, the electronic switch tube Q1 is a PMOS tube, the source of the PMOS tube constitutes the first end of the electronic switch tube Q1, the drain of the PMOS tube constitutes the second end of the electronic switch tube Q1, and the gate of the PMOS tube constitutes the control end of the electronic switch tube Q1.

[0067] When the charger 200 is connected to the charging interface 10, the gate voltage of the PMOS tube is less than the source voltage, the PMOS tube is turned on, and when the optocoupler U1 is turned on, the second resistor R2 is short-circuited, the gate voltage of the PMOS tube is equal to the source voltage, and the PMOS tube is turned off.

[0068] The positive terminal and the negative terminal can select corresponding contact points, probes and other structures, such as Figure 7 As shown, optionally, the positive terminal and the negative terminal are metal probes.

[0069] Among them, Figure 7 As shown, 1 is the charging interface 10 of the charging circuit 110, 2 is the charging interface 10 of the charger 200; 3 is the waterproof rubber plug of the charging interface 10, 4 is the positive terminal and the negative resistor of the charging interface 10, 5 is the round head plum self-tapping screw, 6 is the flange nut, 7 is the O-type waterproof ring, 8 is the power cord of the charger 200, 9 is the female connector of the power cord, and 11 is the plastic base of the water power equipment 100.

[0070] The charging interface 10 also includes a waterproof rubber plug. The plastic base is integrally formed with the water power equipment 100. The waterproof rubber plug is used to make the charging interface 10 waterproof and prevent the metal probe from contacting water.

[0071] Furthermore, in order to prevent the residual charge from affecting the working characteristics of the charging interface 10 or the charging module, in an optional embodiment, as Figure 3As shown, the contacts of the first relay K1 include a first moving contact, a first stationary contact and a second stationary contact, and the contacts of the second relay K2 include a second moving contact, a third stationary contact and a fourth stationary contact;

[0072] The first moving contact constitutes a first end of a contact of the first relay K1, the first stationary contact constitutes a second end of the contact of the first relay K1, the second moving contact constitutes a first end of a contact of the second relay K2, and the third stationary contact constitutes a second end of the contact of the first relay K1;

[0073] The switch circuit 20 further includes a fifth resistor R5;

[0074] The fifth resistor R5 is connected between the second stationary contact and the fourth stationary contact.

[0075] In this embodiment, during normal charging, the charging interface 10 is connected to the charger 200, and the charger 200 outputs charging power to the charging interface 10. The charging interface 10 is powered on and outputs charging power to the first moving contact of the first relay K1 and the second moving contact of the second relay K2, as well as to the electronic switch tube Q1. The electronic switch tube Q1 is triggered to be turned on, and both ends of the coil of the first relay K1 and the coil of the second relay K2 are powered on, and the first moving contact and the first static contact of the first relay K1 are attracted, and the second moving contact and the third static contact of the second relay K2 are attracted. The first static contact of the first relay K1 and the third static contact of the second relay K2 constitute the output end of the relay 21 and are connected to the battery module 120. The first relay K1 and the second relay K2 are turned on, and the charging power is output to the battery module 120 through the relay 21, and the battery module 120 is charged.

[0076] At the same time, the main control circuit 30 communicates with the battery management circuit 121 of the battery module 120 and obtains the charging status of the battery 122. When the charger 200 and the charging interface 10 are in a connected charging state, the main control circuit 30 outputs a conduction signal, the optocoupler U1 is turned off, and the electronic switch tube Q1 continues to maintain the conduction state.

[0077] When the charger 200 is disconnected from the charging interface 10, or the battery 122 is fully charged, the battery 122 stops charging, that is, when the battery 122 is in an uncharged state, the main control circuit 30 outputs a shutdown signal to the optocoupler U1, the optocoupler U1 is turned on, and the second resistor R2 is short-circuited, the electronic switch tube Q1 is turned off, the coils of the first relay K1 and the second relay K2 are powered off, the first moving contact of the first relay K1 is disconnected from the first static contact, and the first moving contact and the second static contact are connected, and the second moving contact of the second relay K2 is disconnected from the third static contact. The second moving contact is connected to the fourth static contact, the output of charging power to the battery module 120 is stopped, the charging interface 10 is disconnected from the battery module 120, and the residual charge on the charging interface 10 is discharged through the second static contact, the fifth resistor R5 and the fourth static contact. The charging interface 10 is not charged. Therefore, when the water power equipment 100 is in use, even if it comes into contact with seawater, the positive terminal will not be corroded because the positive terminal and the negative terminal are not charged, thereby realizing the anti-corrosion protection of the charging interface 10 and improving the corrosion resistance of the charging interface 10.

[0078] The battery management circuit 121 is also connected to the switch circuit 20. The battery management circuit 121 obtains charging power through the switch circuit 20. In order to obtain the charging state of the battery 122, in an optional embodiment, Figure 4 As shown, the main control circuit 30 includes:

[0079] The communication circuit 31 is connected to the battery management circuit 121;

[0080] The main controller 32 is connected to the switch circuit 20 and the communication circuit 31. The main controller 32 is used to communicate with the battery management circuit 121 through the communication circuit 31, obtain the charging status of the battery 122, and trigger the output shutdown signal to the switch circuit 20 when the battery 122 is not charged.

[0081] In this embodiment, the main controller 32 establishes communication with the battery management circuit 121 through the communication circuit 31, and obtains the charging status of the battery 122 in real time. When the charger 200 and the charging interface 10 are in a connected charging state, the main controller 32 outputs a conduction signal, and the switch circuit 20 continues to maintain the conduction state.

[0082] When the charger 200 is disconnected from the charging interface 10, or the battery 122 is fully charged, the battery 122 stops charging, that is, when the battery 122 is in an uncharged state, the main controller 32 outputs a shutdown signal to the switch circuit 20 after learning the current charging state of the battery 122, the switch circuit 20 is turned off, the connection between the charging interface 10 and the battery module 120 is disconnected, and the charging interface 10 is not charged. Therefore, when the water power equipment 100 is in use, even if it comes into contact with seawater, the positive terminal will not be corroded because the positive terminal and the negative terminal are not charged, thereby realizing the anti-corrosion protection of the charging interface 10 and improving the corrosion resistance of the charging interface 10.

[0083] The main controller 32 may adopt a corresponding controller structure, such as a processor such as an MCU, a single-chip microcomputer, or a CPU.

[0084] Different types of communication circuits 31 can be set according to different types of battery management circuits 121. The communication circuit 31 can be a wired communication module such as an RS485 module, an RS232 module, or a wireless communication module, etc. The specific structure is not limited.

[0085] Furthermore, in order to ensure that the main control circuit 30 operates reliably under different charging conditions, the main control circuit 30 is powered by the battery module 120. Figure 5 As shown, in an optional embodiment, the charging circuit 110 of the water power equipment 100 further includes:

[0086] The power conversion circuit 40 is connected to the main control circuit 30 and the battery module 120 . The power conversion circuit 40 is used to convert the power signal output by the battery module 120 into working power and output it to the main control circuit 30 .

[0087] In this embodiment, the power conversion circuit 40 is connected to the battery management circuit 121, obtains a power signal from the battery management circuit 121, and converts the power signal into working power and outputs it to the main control circuit 30, wherein the main controller 32 and the communication circuit 31 can obtain working power from the power conversion circuit 40 at the same time, or the main controller 32 obtains power from the power conversion circuit 40, and the communication circuit 31 obtains power from the main controller 32, and the specific power acquisition method is not limited.

[0088] The power conversion circuit 40 can adopt corresponding conversion circuits, conversion chips, etc. In an optional embodiment, the power conversion circuit 40 includes a DC / DC conversion chip, the power input end of the DC / DC conversion chip is connected to the battery module 120, and the power output end of the DC / DC conversion chip is connected to the main control circuit 30.

[0089] At the same time, according to the power acquisition method of the main controller 32 and the communication circuit 31, one or more DC / DC conversion chips can be set. When multiple DC / DC conversion chips are set, the multiple DC / DC conversion chips can be connected in series or separately set, so as to output working power of different voltage sizes to the main controller 32 and / or the communication circuit 31.

[0090] In order to realize the normal communication of the main control circuit 30, Figure 6 As shown, in an optional embodiment, the main control circuit 30 further includes a crystal oscillator 33 , which is connected to the main controller 32 , and is used to provide a clock signal to the main controller 32 .

[0091] Compared with the prior art, the embodiments of the utility model have the following beneficial effects: the charging circuit 110 of the above-mentioned water power equipment 100 includes a charging interface 10, a switch circuit 20 and a main control circuit 30. During charging, the switch circuit 20 is triggered to conduct and charges the battery module 120 in the water power equipment 100. The main control circuit 30 communicates with the battery module 120 and obtains the charging status of the battery module 120. When the charging interface 10 is disconnected from the charger 200 or the battery module 120 is fully charged but not charged, the main control circuit 30 controls the switch circuit 20 to turn off, the charging interface 10 is not charged, and no electrochemical corrosion occurs between the charging interface 10 and the seawater, thereby protecting the charging interface 10 of the charging circuit 110.

[0092] The utility model also provides a water power device 100, which includes a battery module 120 and a charging circuit 110 of the water power device 100. The specific structure of the charging circuit 110 of the water power device 100 refers to the above embodiment. Since the water power device 100 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the battery module 120 is connected to the charging circuit 110 of the water power device 100.

[0093] The charging circuit 110 is used to charge the battery module 120 in the water power equipment 100. The battery module 120 includes a battery 122 and a battery management circuit 121 connected to the battery 122. The battery management circuit 121 is used to manage the charging and discharging of the battery 122 to output the corresponding driving power to the driving parts in the water power equipment 100, and to feedback the charging status of the battery 122 to the corresponding control module to realize status monitoring of the battery 122.

[0094] The water power equipment 100 also includes a driving component, and the battery module 120 provides power for the driving component.

[0095] Among them, the water power equipment 100 includes but is not limited to a powered life buoy, and can also be a water power equipment 100 such as an unmanned boat, wherein the powered life buoy also includes a life buoy body, a propeller, and a driving component for driving the corresponding propeller to rotate, and the battery module 120 supplies power to the driving component.

[0096] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A charging circuit (110) of a water power device (100), characterized in that: include: A charging interface (10), used for connecting to a charger (200); A switch circuit (20) is connected to the charging interface (10) and a battery module (120) of the water power equipment (100), the switch circuit (20) being triggered to turn on when the charging interface (10) is powered on, and being triggered to turn off by a shutdown signal; A main control circuit (30) is connected to the battery module (120) and the switch circuit (20), and the main control circuit (30) is used to communicate with the battery module (120) and obtain the charging state of the battery module (120), and trigger the output of the shutdown signal when the battery module (120) is not charged.

2. The charging circuit (110) of the water power equipment (100) according to claim 1, characterized in that: The switch circuit (20) comprises: A relay (21), wherein a contact of the relay (21) is connected between the charging interface (10) and the battery module (120); A relay drive circuit (22), the relay drive circuit (22) being connected to the charging interface (10), the main control circuit (30) and the coil of the relay (21) respectively; the relay drive circuit (22) triggers the coil of the relay (21) to be energized when the charging interface (10) is powered on, and attracts the contacts of the relay (21); and is triggered by the shutdown signal to cut off the output power signal to the coil of the relay (21).

3. The charging circuit (110) of the water power equipment (100) according to claim 2, characterized in that: The charging interface (10) comprises a positive terminal and a negative terminal, and the relay (21) comprises a first relay (K1) and a second relay (K2); The first end of the contact of the first relay (K1) is connected to the positive terminal, the first end of the contact of the second relay (K2) is connected to the negative terminal, the second end of the contact of the first relay (K1) and the second end of the contact of the second relay (K2) constitute the output end of the switch circuit (20), and the coil of the first relay (K1) and the coil of the second relay (K2) are respectively connected to the relay drive circuit (22).

4. The charging circuit (110) of the water power equipment (100) according to claim 3, characterized in that: The relay drive circuit (22) comprises an electronic switch tube (Q1), a first diode (D1), a second diode (D2), a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a capacitor (C1) and an optical coupler (U1); The first end of the electronic switch tube (Q1), the first end of the first resistor (R1), the collector of the optocoupler (U1), and the first end of the contact of the first relay (K1) are connected to the positive terminal; the control end of the electronic switch tube (Q1), the second end of the first resistor (R1), the first end of the second resistor (R2) and the emitter of the optocoupler (U1) are connected; the second end of the second resistor (R2), the anode of the first diode (D1), the anode of the second diode (D2), the first end of the coil of the first relay (K1), the first end of the coil of the second relay (K2), and the contact of the second relay (K2) are connected to the positive terminal; The first end of the point is connected to the negative terminal, the second end of the electronic switch tube (Q1), the first end of the third resistor (R3) and the first end of the capacitor (C1) are connected, the second end of the third resistor (R3), the second end of the capacitor (C1), the cathode of the first diode (D1), the cathode of the second diode (D2), the second end of the coil of the first relay (K1), and the second end of the coil of the second relay (K2) are connected, the anode of the optical coupler (U1) is connected to the positive power supply terminal, the cathode of the optical coupler (U1) is connected to the fourth resistor (R4), and the second end of the fourth resistor (R4) is connected to the main control circuit (30).

5. The charging circuit (110) of the water power equipment (100) according to claim 3, characterized in that: The contacts of the first relay (K1) include a first moving contact, a first stationary contact and a second stationary contact, and the contacts of the second relay (K2) include a second moving contact, a third stationary contact and a fourth stationary contact; The first moving contact constitutes a first end of a contact of the first relay (K1), the first stationary contact constitutes a second end of a contact of the first relay (K1), the second moving contact constitutes a first end of a contact of the second relay (K2), and the third stationary contact constitutes a second end of a contact of the first relay (K1); The switch circuit (20) further includes a fifth resistor (R5); The fifth resistor (R5) is connected between the second stationary contact and the fourth stationary contact.

6. The charging circuit (110) of the water power equipment (100) according to claim 1, characterized in that: The battery module (120) comprises a battery (122) and a battery management circuit (121), wherein the battery management circuit is connected to the switch circuit (20) and the battery (122) respectively; The main control circuit (30) comprises: A communication circuit (31) connected to the battery management circuit (121); A main controller (32) is connected to the switch circuit (20) and the communication circuit (31), and the main controller (32) is used to communicate with the battery management circuit (121) through the communication circuit (31), obtain the charging status of the battery (122), and trigger the output of the shutdown signal to the switch circuit (20) when the battery (122) is not charged.

7. The charging circuit (110) of the water power equipment (100) according to claim 1, characterized in that: The charging circuit (110) of the water power equipment (100) further comprises: A power conversion circuit (40) is connected to the main control circuit (30) and the battery module (120), and the power conversion circuit (40) is used to convert a power signal output by the battery module (120) into a working power supply and output the power supply to the main control circuit (30).

8. The charging circuit (110) of the water power equipment (100) according to claim 7, characterized in that: The power conversion circuit (40) comprises a DC / DC conversion chip, the power input end of the DC / DC conversion chip is connected to the battery module (120), and the power output end of the DC / DC conversion chip is connected to the main control circuit (30).

9. The charging circuit (110) of the water power equipment (100) according to claim 3, characterized in that: The positive terminal and the negative terminal are metal probes.

10. A water power equipment (100), characterized in that: A charging circuit (110) comprising a battery module (120) and a water power device (100) according to any one of claims 1 to 9; The battery module (120) is connected to the charging circuit (110) of the water power equipment (100).

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