CN109742841B

CN109742841B - Unmanned ship double-battery power supply circuit

Info

Publication number: CN109742841B
Application number: CN201910051080.6A
Authority: CN
Inventors: 赵博; 何飞龙; 李勇; 查锐; 高地振; 李杭; 曹义山; 刘吉
Original assignee: Shanghai Huace Navigation Technology Ltd
Current assignee: Shanghai Huace Navigation Technology Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2022-11-22
Anticipated expiration: 2039-01-17
Also published as: CN109742841A

Abstract

The invention provides a double-battery power supply circuit for an unmanned ship, which comprises two power supply circuits arranged in a mirror image manner, wherein when batteries are switched on in two paths, if the voltage of one of the two paths of batteries is higher than that of the other path of batteries, the MOS (metal oxide semiconductor) tube with higher voltage is switched on, and the system is powered by the MOS tube with higher voltage; if the voltage of one battery is equal to that of the other battery, the two MOS tubes are opened, and the two MOS tubes supply power to the system at the same time.

Description

Unmanned ship double-battery power supply circuit

Technical Field

The invention relates to the field of unmanned ship power supply systems, in particular to a double-battery power supply circuit for an unmanned ship.

Background

The power supply of unmanned ship products in actual use is a basic and important design consideration. In consideration of the actual operation scene of the unmanned ship, the unmanned ship mostly uses batteries for power supply at present, so that the situation of long-time continuous operation must be considered, and the problem of battery capacity is faced, the small-capacity batteries obviously cannot meet the requirement of long-time operation, but the large-capacity batteries have larger volume and larger weight, the manufacturing process is more troublesome, and the unmanned ship also faces larger potential safety hazard.

Disclosure of Invention

In order to overcome the defects, the invention provides the unmanned ship double-battery power supply circuit, the double-battery power supply circuit realizes power supply for the unmanned ship product through two batteries, the double batteries supply power independently or together under different conditions, the time length of outdoor continuous operation can be effectively prolonged, and meanwhile, unreasonable high-capacity batteries are avoided.

The invention provides a double-battery power supply circuit for an unmanned ship, which comprises two power supply circuits arranged in a mirror image manner, wherein when batteries are switched on in two paths, if the voltage of one of the two paths of batteries is higher than that of the other path of batteries, the MOS (metal oxide semiconductor) tube with higher voltage is switched on, and the system is powered by the MOS tube with higher voltage; if the voltage of one battery is equal to that of the other battery, the two MOS tubes are opened, and the two MOS tubes simultaneously supply power to the system.

In the circuit, each path is a single battery power supply circuit, before the battery is switched on, the MOS tube is in a closed state, when the battery is just switched on, each point on an R3 line is equal in pressure, and GND is VCC _ BAT at the moment; the MOS body diode is conducted in the presence of the MOS body diode, the GND is slightly higher than the GND _ BAT at the moment, and the differential pressure is the voltage drop of the diode; GND and GND _ BAT are respectively the positive and negative input ends of the comparator LM393, after comparison and amplification, the output is pulled up to high level, the MOS tube is conducted, at the moment, GND is slightly higher than GND _ BAT, the differential pressure is Vds, and the MOS tube is always conducted after passing through the comparator.

In the above circuit, if another battery is connected, when the voltage of the battery is higher than that of the first battery, the equivalent voltage is pulled up from the zero point to the voltage difference between the two, and due to the presence of the comparator, the MOS transistor of the first battery is turned off, and the MOS transistor in the channel of the second battery is turned on, so that the channel of the second battery is always on; on the contrary, if the voltage is lower than the voltage of the first path of battery, the first path of MOS is always in a conducting state; when the battery voltages are equal, the voltage difference of the two paths of GND _ BAT is extremely small, and the two paths of MOS tubes are both started to supply power for the rear-stage load together.

The invention provides a double-battery power supply circuit of an unmanned ship, which has the following beneficial effects: the double-battery power supply circuit can use a single battery for power supply, and can also use two batteries simultaneously. When the voltage of one battery is higher than that of the other battery, the high-voltage battery supplies power to the unmanned ship system; when the voltage difference of the two batteries is small, the two batteries jointly supply power to the unmanned ship system. Therefore, the continuous working time of the product is prolonged under the condition of not increasing the energy storage capacity of the single battery.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic diagram of a dual battery power supply circuit of the present invention.

Fig. 2 is a partial detailed schematic diagram of a single cell according to the present invention.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.

Referring to fig. 1-2, the dual-battery power supply circuit for the unmanned ship provided by the invention comprises two power supply circuits arranged in a mirror image manner, wherein when batteries are connected in two paths, if the voltage of one of the two paths of batteries is higher than that of the other path of batteries, the MOS (metal oxide semiconductor) tube with the higher voltage is opened, and the path supplies power to a system; if the voltage of one of the batteries is equal to that of the other battery, the two MOS tubes are both opened, the two MOS tubes simultaneously supply power to the system, each MOS tube is a single battery power supply circuit, the MOS tubes are in a closed state before the batteries are switched on, when the batteries are just switched on, each point on an R3 line is equal in pressure, and the GND is VCC _ BAT; the MOS body diode is conducted in the presence of the MOS body diode, the GND is slightly higher than the GND _ BAT at the moment, and the differential pressure is the voltage drop of the diode; GND and GND _ BAT are respectively the positive and negative input ends of the comparator LM393, after comparison and amplification, the output is pulled up to a high level, the MOS tube is conducted, at the moment, GND is slightly higher than GND _ BAT, the differential pressure is Vds, the MOS tube is always conducted after the comparator, if another battery is connected, when the voltage of the battery is higher than that of the first circuit, the equivalent voltage is pulled up to the differential pressure of the first circuit and the second circuit from a zero point, due to the existence of the comparator, the first circuit of the MOS tube is closed, and the MOS tube in the channel of the second circuit is in an open state, so that the second circuit of the high-voltage battery is always conducted; on the contrary, if the voltage is lower than the voltage of the first path of battery, the first path of MOS is always in a conducting state; when the battery voltages are equal, the voltage difference of the two paths of GND _ BAT is extremely small, the two paths of MOS tubes are both opened, and the two paths of MOS tubes jointly supply power for the rear-stage load.

A specific example is provided below

Embodiment 1, with reference to fig. 1 and fig. 2, the dual-battery power supply circuit board is basically composed of two mirrored paths, and as shown in fig. 1, when the two paths are both connected by a battery, if one of the battery voltages is higher than the other battery voltage, the MOS transistor with the higher voltage is turned on, and the MOS transistor supplies power to the system; if the voltage of one battery is equal to that of the other battery, the two MOS tubes are both opened, and the two MOS tubes simultaneously supply power to the system. J4 and J7 are power input interfaces of the rear-stage load circuit, the power supply source is two paths of batteries, and the number of the load interfaces is reduced according to specific conditions.

Each path is a single battery power supply circuit, and a detailed schematic diagram of the design circuit can refer to fig. 2.

Before the battery is switched on, the MOS tube is in a closed state, so that when the battery is just switched on, each point on an R3 line is in equal pressure, and the GND is VCC _ BAT;

because the MOS body diode exists, the MOS body diode is conducted, the GND is slightly higher than the GND _ BAT at the moment, and the differential pressure is the voltage drop of the diode;

GND and GND _ BAT are respectively the positive and negative input ends of the comparator LM393, after comparison and amplification, the output is pulled up to high level, the MOS tube is conducted, at the moment, GND is slightly higher than GND _ BAT, the voltage difference is Vds, obviously, the MOS tube is always conducted after passing through the comparator, and therefore the power can be supplied all the time.

If a second path of batteries is connected, when the voltage of the second path of batteries is higher than that of the first path of batteries, the equivalent voltage at the position 1 is pulled up to the voltage difference between the zero position and the first path of batteries, and due to the existence of the comparator, the MOS tube of the first path is closed, and the MOS tube in the channel of the second path of batteries is in an open state, so that the second path of high-voltage battery is always conducted; on the contrary, if the voltage is lower than the voltage of the first path of battery, the first path of MOS is always in a conducting state; when the battery voltages are equal, the voltage difference of the two paths of GND _ BAT is extremely small, the two paths of MOS tubes are both opened, and the two paths of MOS tubes jointly supply power for the rear-stage load. The working principle of the dual-battery power supply circuit is as above.

Because the voltage can reduce when the battery discharges, so this circuit can the discharge of balanced battery automatically when two batteries work simultaneously, and the battery discharge current that the capacity is high promptly will be bigger. Therefore, the circuit can automatically balance batteries with different capacities and batteries with different electric quantities for parallel use. The circuit can be expanded to multiple paths, and balanced power supply of a plurality of batteries is realized. The double-battery power supply circuit can be supplied with power by a single battery, and can also simultaneously use two batteries. When the voltage of one battery is higher than that of the other battery, the high-voltage battery supplies power to the unmanned ship system; when the voltage difference of the two batteries is small, the two batteries jointly supply power to the unmanned ship system. Therefore, the continuous working time of the product is prolonged under the condition of not increasing the energy storage capacity of the monocell; the circuit can be used for various underwater test sonar systems such as a single-beam depth sounder, a multi-beam depth sounder, an ADCP (acoustic Doppler current profiler) and other modules which are possibly adapted on an unmanned ship, and supplies power to corresponding systems, so that the continuous working time of the whole system is prolonged; under the condition that the energy storage capacity of a single battery is not increased, the multiple batteries are used for carrying out balanced power supply on the load system at the same time, and the working time of the whole system is greatly prolonged.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in which devices and structures not described in detail are understood to be implemented in a manner that is conventional in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention, unless the technical essence of the present invention is not departed from the content of the technical solution of the present invention.

Claims

1. A double-battery power supply circuit for an unmanned ship comprises two power supply circuits arranged in a mirror image mode, and is characterized in that when batteries are connected in two paths, if the voltage of one path of battery is higher than that of the other path of battery, the MOS tube with the higher voltage is opened to supply power to a system; if the voltage of one of the two paths of batteries is equal to that of the other path of batteries, the two paths of MOS tubes are both opened, the two paths of MOS tubes simultaneously supply power to the system, each path is a single battery power supply circuit, the MOS tubes are in a closed state before the batteries are switched on, when the batteries are just switched on, each point on a resistor R3 line is in equal pressure, and the GND is VCC _ BAT at the moment; the MOS body diode is conducted in the presence of the MOS body diode, the GND is slightly higher than the GND _ BAT at the moment, and the differential pressure is the voltage drop of the diode; GND and GND _ BAT are respectively the positive and negative input ends of the comparator LM393, after comparison and amplification, the output is pulled up to a high level, the MOS tube is conducted, at the moment, GND is slightly higher than GND _ BAT, the differential pressure is Vds, the MOS tube is always conducted after the comparator, if another battery is connected, when the voltage of the battery is higher than that of the first circuit, the equivalent voltage is pulled up to the differential pressure of the first circuit and the second circuit from a zero point, due to the existence of the comparator, the first circuit of the MOS tube is closed, and the MOS tube in the channel of the second circuit is in an open state, so that the second circuit of the high-voltage battery is always conducted; on the contrary, if the voltage is lower than the voltage of the first path of battery, the first path of MOS is always in a conducting state; when the battery voltages are equal, the voltage difference of the two paths of GND _ BAT is extremely small, the two paths of MOS tubes are both opened, and the two paths of MOS tubes jointly supply power for the rear-stage load.