CN216774289U

CN216774289U - Outboard engine system

Info

Publication number: CN216774289U
Application number: CN202123043311.0U
Authority: CN
Inventors: 高辉
Original assignee: Shenzhen Bote Power Technology Co ltd
Current assignee: Shenzhen Bote Power Technology Co ltd
Priority date: 2021-12-04
Filing date: 2021-12-04
Publication date: 2022-06-17
Anticipated expiration: 2031-12-04

Abstract

An outboard engine system comprises an outboard engine battery reverse connection preventing circuit, wherein the reverse connection preventing circuit is arranged in a driver; the driver is connected with the motor, the battery module and the communication module, the battery module provides power for the outboard engine driving circuit, the communication module is connected with the driver and the operation module, the operation module controls the motor to operate through the communication module and the driver, and the communication module is in communication connection with the battery module and monitors and manages the operation condition of the battery module; the circuit for preventing the reverse connection of the battery comprises a battery terminal VBAT + and BGND, an NMOS tube Q1 controlled by a switch, and voltage divider resistors R1 and R2; the capacitor C1 is connected with the divider resistor R2 in parallel; a TVS tube between the source electrode and the grid electrode of the NMOS tube Q1; and the battery terminal VBAT + is connected with the positive electrode of the outboard engine driving circuit. The technical scheme of the utility model has the advantages of reverse connection prevention of the electric control system, prevention of damage of an outboard engine system caused by reverse connection of the battery, simple structure, low cost and obvious economic benefit.

Description

Outboard engine system

Technical Field

The utility model belongs to the field of electric outboard engines, and particularly discloses an outboard engine system.

Background

A propulsion engine in which an outboard engine is mounted on the outside of a hull (side) is usually suspended on the outside of a transom, and is also called an outboard engine. Outboard engines are classified into fuel oil type and electric outboard engines according to energy sources. The electric outboard engine is driven by energy supplied by an energy storage battery, has the characteristics of lightness, convenience, low noise and the like, and in the using process of a client, the client needs to link the power line of the battery and the outboard engine by himself, so that the condition that the positive electrode and the negative electrode are connected reversely exists, and the circuit is burnt to damage the engine. In the traditional reverse connection prevention mode, an NMOS plus isolation power supply and an NMOS plus optocoupler or PMOS scheme are used at the positive electrode, so that the cost is high, or the realization is difficult during large current.

Disclosure of Invention

In view of the above problems, it is an object of the present invention to provide an outboard engine system having a battery reverse connection preventing circuit at a low cost.

An outboard engine system includes an outboard engine battery reverse connection preventing circuit; the outboard engine battery reverse connection preventing circuit is arranged in the driver; the driver is connected with the motor, the battery module and the communication module, the battery module provides power for the outboard engine driving circuit, the communication module is connected with the driver and the operation module, the operation module controls the motor to operate through the communication module and the driver, and the communication module is in communication connection with the battery module and monitors and manages the operation condition of the battery module;

the outboard engine battery reverse connection preventing circuit comprises battery terminals VBAT +, BGND, an NMOS tube Q1 controlled by a switch, and voltage dividing resistors R1 and R2; the drain electrode of the NMOS tube Q1 is electrically connected with a battery terminal BGND, and the source electrode of the NMOS tube Q1 is connected with the negative electrode of the outboard engine driving circuit; the voltage dividing resistors R1 and R2 form a series voltage dividing circuit, one end of the voltage dividing circuit is connected with a battery terminal VBAT +, the other end of the voltage dividing circuit is connected with a source electrode of an NMOS tube Q1, and a grid electrode of the NMOS tube Q1 is connected with a series point of the voltage dividing resistors R1 and R2; the capacitor C1 is used for adjusting the switching time, and the capacitor C1 is connected with the voltage dividing resistor R2 in parallel; the transient diode TVS is connected between the source electrode and the grid electrode of the NMOS transistor Q1 in parallel; and the battery terminal VBAT + is connected with the positive electrode of the outboard engine driving circuit.

The further technical scheme of the utility model is as follows: the display module is connected with the communication module, displays the electric quantity and temperature information of the battery, and displays the running speed of the motor and the outboard engine alarm information.

The further technical scheme of the utility model is as follows: the driver comprises an outboard engine driving circuit and a battery reverse connection preventing circuit, the battery reverse connection preventing circuit is connected with the battery module, and when the battery power supply is connected reversely, the driver does not work and sends out warning information.

The further technical scheme of the utility model is as follows: when the communication module collects that only 20% of the electric energy of the battery module is left, the communication module sends out timely charging information; and when the residual battery capacity is only 10%, sending out alarm information.

The utility model has the positive effects that: according to the technical scheme, the reverse connection prevention of the electric control system can be realized only by using one NMOS tube and two common resistors to form the voltage division circuit, the damage of the outboard engine system caused by the reverse connection of the battery is prevented, a power supply or an optical coupler does not need to be isolated, and the electric control system is simple in structure, low in cost and obvious in economic benefit. A TVS tube or a voltage stabilizing diode is adopted, the NMOS tube can be effectively prevented from being damaged by overvoltage, a capacitor is connected between a grid electrode and a drain electrode of the NMOS tube in parallel, the starting time of the NMOS tube is controlled, and the damage of the NMOS tube just receiving pulse voltage impact can be effectively prevented.

The utility model will be further described with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic diagram of the circuit of the present invention.

Fig. 2 is a block diagram of the outboard engine system of the present invention.

Q1: NMOS tube, 1: NMOS transistor gate, 2: drain of NMOS tube, 3: NMOS transistor source electrodes, T1, T2, T3 and T4 voltage test points, R1 and R2 divider resistors, a C1 capacitor and a D1 voltage stabilizing diode.

Detailed Description

The present invention will be described in detail by way of specific examples in order to enable those skilled in the art to better understand the technical solutions of the present invention. It should be understood, however, that the detailed description is provided for a better understanding of the utility model only and that they should not be taken as limiting the utility model. In describing the present invention, it is to be understood that the terminology used is for the purpose of description only and is not intended to be indicative or implied of relative importance.

A battery reverse connection preventing circuit for an outboard engine comprises battery terminals VBAT +, BGND, an NMOS transistor Q1 controlled by a switch, voltage dividing resistors R1 and R2, and a capacitor C1 for adjusting the switching time; the drain 2 of the NMOS tube Q1 is electrically connected with a battery terminal BGND, and the source 3 of the NMOS tube Q1 is connected with the negative electrode of the outboard engine driving circuit; the voltage dividing resistors R1 and R2 form a series voltage dividing circuit, one end of the voltage dividing circuit is connected with a battery terminal VBAT +, the other end of the voltage dividing circuit is connected with a source electrode 3 of an NMOS tube Q1, and a grid electrode 1 of the NMOS tube Q1 is connected with a series point of the voltage dividing resistors R1 and R2; the capacitor C1 is connected with a voltage dividing resistor R2 in parallel; and the battery terminal VBAT + is connected with the positive electrode of the outboard engine driving circuit.

The NMOS tube Q1 is used for the control of the main loop switch, the conduction of the NMOS tube Q1 means that the battery is connected correctly, and the non-conduction means that the polarity of the battery is connected reversely; the voltage dividing resistor R1 and the voltage dividing resistor R2 are connected in series and used for controlling the switch of the MOS tube; the capacitor C1 is used for adjusting the switching time, and the voltage stabilizing diode D1 is used for preventing the MOS tube from being damaged by overvoltage. The NMOS tube Q1 is provided with a parasitic diode, the anode of the parasitic diode is connected with the source electrode of the NMOS tube Q1, and the cathode of the parasitic diode is connected with the drain electrode of the NMOS tube Q1.

The outboard engine system is an outboard engine electric control system and comprises a motor, a driver, a communication module and an operation module. The driver is connected with the motor to drive the motor to work, the battery module is connected with the driver to provide electric energy for the outboard engine system, the communication module is connected with the driver to control the motor to operate and operate, the operation module is connected with the communication module to provide a control instruction, and the communication module is connected with the battery module to monitor and manage the operation condition of the battery module. The communication module is communicated with the driver, the operation module and the battery module by CAN, the communication module is provided with a central processing unit for analyzing and calculating information, the communication module collects electric energy information of the battery module and receives a control instruction of the operation module, calculates the collected information and the received instruction and outputs control information to the driver, and the driver controls the running state of the motor, such as starting, stopping, accelerating, decelerating or steering, according to the control information. If the communication module collects that the electric energy of the battery module is only 20%, the communication module sends out timely charging information, and if the residual electric quantity is only 10%, the communication module sends out warning information. The communication module also collects the temperature of the battery module and sends out alarm information when the temperature exceeds a set threshold value. The driver comprises an outboard engine driving circuit and a battery reverse connection preventing circuit, the battery reverse connection preventing circuit is connected with the battery module, and when the battery power supply is connected reversely, the driver does not work and sends out warning information. The CAN chip selects SIT1050T, the central processing unit selects STM32F103 of ST company, the maximum working frequency is 72MHZ, and the FLASH storage space selects 512K. The outboard engine system further comprises a display module, wherein the display module is connected with the communication module, displays the electric quantity and temperature information of the battery, and displays the running speed of the motor and the warning information of the outboard engine. The display screen adopts JLX12896G-950-P (with character library), dot matrix: 128 × 96, external dimension: 59 × 61.7 × 4.9mm, window size: 54.2 × 42.5mm, display color: the white bottom black words/blue bottom white words can be selected.

When the positive and negative electrode lines of the battery are normally connected, namely VBAT + is connected with the positive electrode, BGND is connected with the negative electrode, when the power supply is turned on (connected), the NMOS tube Q1 is closed, and the main loop forms a loop through a parasitic diode of Q1. Meanwhile, two ends of the capacitor C1 are charged through the voltage-dividing resistor R1, when the voltage reaches the Q1 turn-on voltage (generally 3-5V), the Q1 is turned on, the whole loop forms a path, and the outboard motor system works normally. The continuous conducting state of the NMOS tube Q1 is maintained by voltage division of two resistors R1 and R2 to generate a forward voltage of 10-15V at a point T2 (relative to the voltage at a point T3). When the positive and negative lines of the battery are connected reversely, namely VBAT + is connected with the negative electrode, BGND is connected with the positive electrode, when the power supply is turned on (connected), the NMOS tube Q1 is closed, and the main loop has no current (the parasitic diode Q1 is cut off reversely). The voltage at the point T1 is lower than the voltages at the points T2 and T3, and because the zener diode D1 is in forward conduction, the voltage at the point T2 relative to the voltage at the point T3 is only 0.7V at most, and the NMOS transistor Q1 is cut off. The function that the main circuit has no current when the reverse connection is realized.

A voltage stabilizing diode D1 is connected in parallel at two ends of the voltage dividing resistor R2, the anode of the voltage stabilizing diode D1 is connected with the source of the NMOS tube Q1, and the cathode is connected with the grid of the NMOS tube Q1. The voltage stabilizing diode D1 selects a 15V voltage stabilizing tube, when VBAT + voltage is too high, if no D1 exists, the voltage at the point T2 may exceed 20V, so that the NMOS tube Q1 of the main loop can be damaged, and after the voltage stabilizing diode D1(15V voltage stabilizing diode) is added, the voltage at the point T2 can be maintained at the highest point of 15V or so. Even if the normal partial voltage of R1 and R2 exceeds 15V, the voltage at the point T2 is clamped to be about 15V by D1, and the voltage at the point T2 is not too high to exceed 20V, so that Q1 is damaged.

The transient diode TVS is further included, and the TVS tube is connected between the source electrode and the grid electrode of the NMOS tube Q1 in parallel. When the VBAT + voltage is too high, if there is no TVS transistor, the voltage at T2 may exceed 20V, which may damage the main loop NMOS Q1, and after adding the TVS diode (15VTVS transistor), the voltage at T2 will be maintained at the highest point of 15V. Even if the normal partial voltage of R1 and R2 exceeds 15V, the voltage at the point T2 is clamped at about 15V by the TVS tube, so that the voltage at the point T2 is not too high to exceed 20V, and the Q1 is not damaged.

In order to prevent the outboard engine driving circuit from being damaged by overcurrent, the outboard engine driving circuit also comprises a fuse; and a fuse is connected in series between the battery terminal VBAT + and the positive electrode of the outboard engine driving circuit.

Due to the existence of the anti-reverse circuit, when the power line is reversely connected, any damage and influence on an outboard motor system can not be caused, and the system can not work normally at the moment. And after the positive polarity and the negative polarity are linked according to a normal sequence, the system works normally.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the utility model without departing from the spirit and scope of the utility model, which is to be covered by the claims. The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An outboard engine system characterized by: comprises an outboard engine battery reverse connection preventing circuit; the outboard engine battery reverse connection preventing circuit is arranged in the driver; the driver is connected with the motor, the battery module and the communication module, the battery module provides power for the outboard engine driving circuit, the communication module is connected with the driver and the operation module, the operation module controls the motor to operate through the communication module and the driver, and the communication module is in communication connection with the battery module and monitors and manages the operation condition of the battery module;

2. The outboard engine system of claim 1, wherein: the display module is connected with the communication module, displays the electric quantity and temperature information of the battery, and displays the running speed of the motor and the outboard engine alarm information.

3. The outboard engine system of claim 1, wherein: the driver comprises an outboard engine driving circuit and a battery reverse connection preventing circuit, the battery reverse connection preventing circuit is connected with the battery module, and when the battery power supply is connected reversely, the driver does not work and sends out warning information.

4. The outboard engine system of claim 1, wherein: when the communication module collects that only 20% of the electric energy of the battery module is left, the communication module sends out timely charging information; and when the residual battery capacity is only 10%, sending out alarm information.