CN217388537U

CN217388537U - New energy ship power supply system based on unidirectional boosting DCDC semi-active structure

Info

Publication number: CN217388537U
Application number: CN202220404390.9U
Authority: CN
Inventors: 肖杨; 刘俊
Original assignee: Wuhan Onion Cloud Network Technology Co ltd
Current assignee: Wuhan Onion Cloud Network Technology Co ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-09-06
Anticipated expiration: 2032-02-25

Abstract

The utility model discloses a new forms of energy boats and ships electrical power generating system based on one-way DCDC that steps up semi-initiative structure, include: providing a super capacitor of a first direct power source for the new energy ship; the lithium ion battery is used for providing a second direct power source for the new energy ship; when the voltage of the super capacitor is lower than that of the lithium ion battery system, the super capacitor is supplemented with electric energy by the unidirectional boosting DCDC, the input end of the unidirectional boosting DCDC is electrically connected with the lithium ion battery, and the output end of the unidirectional boosting DCDC is electrically connected with the super capacitor; and the anti-reverse diode is respectively connected with the anode of the lithium ion battery and the anode of the super capacitor. The utility model discloses not only protected lithium ion battery, but also satisfied the high-power output of new forms of energy boats and ships short-term.

Description

New energy ship power supply system based on unidirectional boosting DCDC semi-active structure

Technical Field

The utility model relates to a new forms of energy boats and ships electrical power generating system based on one-way DCDC semi-initiative structure that steps up.

Background

With the introduction of the dual carbon goal, more and more consumers prefer to use new energy powered products, and the marine industry is no exception.

At present, no matter new energy ships mainly powered by fuel cells or purely electric new energy ships, power supplies generally have no way to be provided with lithium batteries. In general, in terms of selection of lithium batteries, a customer can select an energy type battery or a power type battery according to the use condition, and compared with the energy type battery, the power type battery can output larger capacity in a short time, so that good dynamic property is provided for ships. However, this solution has several disadvantages:

1, the energy type battery is generally difficult to meet the requirement of high-power output of a ship, although the power type battery can output large current in a short time, the output current is not large enough if special working conditions are met;

2, frequent high-power discharge causes irreversible damage to the power battery;

the price of the battery of the power type is too high 3.

SUMMERY OF THE UTILITY MODEL

The utility model provides a new forms of energy boats and ships electrical power generating system based on one-way DCDC semi-initiative structure that steps up, the utility model discloses not only protect lithium ion battery, but also satisfied the short-term high-power output of new forms of energy boats and ships.

New forms of energy boats and ships electrical power generating system based on semi-active structure of one-way step-up DCDC includes:

providing a super capacitor of a first direct power source for the new energy ship;

the lithium ion battery is used for providing a second direct power source for the new energy ship;

when the voltage of the super capacitor is lower than that of the lithium ion battery system, the super capacitor is supplemented with electric energy by the unidirectional boosting DCDC, the input end of the unidirectional boosting DCDC is electrically connected with the lithium ion battery, and the output end of the unidirectional boosting DCDC is electrically connected with the super capacitor;

and the anti-reverse diode is respectively connected with the anode of the lithium ion battery and the anode of the super capacitor.

Under a few conditions, when the discharge capacity of the super capacitor is large, the lithium ion battery can directly provide power for the new energy ship through the anti-reverse diode, so that the short-time high-power output of the new energy ship is met, and the safety of the lithium ion battery system is protected. This structure is charged for super capacitor by lithium ion battery system through the DCDC that steps up, and the guarantee super capacitor is regular electric power sufficient.

The utility model has the advantages that:

1. high-power discharge is supported, and the dynamic property of the ship is good;

2. the lithium battery system is protected by one more layer, so that the service life of the lithium battery system can be prolonged as much as possible;

3. the overall cost is low.

Drawings

FIG. 1 is a block diagram of a new energy ship power supply system based on a unidirectional boost DCDC semi-active structure;

fig. 2 is a schematic circuit diagram of a unidirectional boost DCDC.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings 1 to 2 and the embodiments.

The utility model discloses a new forms of energy boats and ships electrical power generating system based on one-way DCDC semi-initiative structure that steps up, include: providing a super capacitor of a first direct power source for the new energy ship; the lithium ion battery is used for providing a second direct power source for the new energy ship; when the voltage of the super capacitor is lower than that of the lithium ion battery system, the super capacitor is supplemented with electric energy by the unidirectional boosting DCDC, the input end of the unidirectional boosting DCDC is electrically connected with the lithium ion battery, and the output end of the unidirectional boosting DCDC is electrically connected with the super capacitor; and the anti-reverse diode is respectively connected with the anode of the lithium ion battery and the anode of the super capacitor.

The super capacitor is the first direct power source of the new energy ship. In a conventional capacitor, charges are forced to move in an electric field, and when a medium is present between conductors, the movement of the charges is blocked, so that the charges are accumulated on the conductors, and accumulated and stored charges are stored, and the amount of the stored charges is called as capacitance. The principle of the super capacitor is that excessive charges with opposite signs appear on the surface of a metal electrode inserted into an electrolyte solution and on two sides of the liquid level, so that a potential difference is generated between phases. Then, if two electrodes are inserted into the electrolyte at the same time and a voltage less than the decomposition voltage of the electrolyte solution is applied therebetween, positive and negative ions in the electrolyte rapidly move to both electrodes under the action of the electric field and form compact charge layers, i.e., electric double layers, on the surfaces of the two upper electrodes, respectively, which form electric double layers similar to the polarization charges generated by the dielectric in the conventional capacitor under the action of the electric field, thereby generating a capacitance effect, the compact electric double layers being similar to a flat capacitor, but have a larger capacity than the conventional capacitor because the compact electric layer spacing is much smaller than the distance between the charge layers of the conventional capacitor. Supercapacitors do not have conventional dielectrics but are separated using insulators. The insulating layer allows positive and negative ions in the electrolyte to pass through. The electrolyte itself is not capable of conducting electrons. Therefore, no leakage occurs in the capacitor (electrons do not flow from one electrode to the other) after the charging is completed. When discharging, electrons on the electrodes flow from one pole to the other through an external circuit. The result is a significant reduction in the adsorption of ions from the electrode to the electrolyte. So that the positive and negative ions in the electrolyte are uniformly distributed again. Based on the working principle, the super capacitor has the advantages of long service life, low cost per cycle, good reversibility, high charging and discharging efficiency, very low internal resistance, high cycle efficiency (more than 95%), high output power, high power density, generally adopts neutral electrolyte with low corrosivity or no corrosivity, and improves the safety of use and storage. Therefore, when the super capacitor is used as the first direct power source, the new energy ship powered by the super capacitor can output high power instantly, has good operation and control capability, and does not worry about irreversible damage to the power source.

The lithium ion battery is a second direct power source of the new energy ship, and after the electric quantity of the super capacitor is released, if the new energy ship needs continuous power operation, the lithium ion battery system preferentially provides power for the new energy ship under the monitoring of the power management system, and charges the super capacitor under the condition that the output capacity is rich until the super capacitor is fully charged. The management strategy has the advantages of ensuring the output of the lithium ion battery system to be continuous and stable, and being beneficial to the use safety of the battery and the prolonging of the service life of the battery.

The unidirectional boost DCDC comprises an energy storage capacitor C1 and at least a first boost circuit, wherein the first boost circuit comprises a first energy storage inductor L1, a first voltage-stabilizing tube Q2 and a first switch tube Q6, one end of the first energy storage inductor L1 is connected with the positive terminal of the lithium ion battery, the other end of the first energy storage inductor L1 is connected with one end of a first voltage-stabilizing tube Q2, the other end of the first voltage-stabilizing tube Q2 is connected with one end of the energy storage capacitor C1, the other end of the energy storage capacitor C1 is connected with the positive terminal of the lithium ion battery, one end of the first switch tube Q6 is connected with the other end of the first energy storage inductor L1, and the other end of the first switch tube Q6 is connected with the negative terminal of the lithium ion battery.

The unidirectional boosting DCDC further comprises a second boosting circuit, the second boosting circuit comprises a second energy storage inductor L2, a second voltage-stabilizing tube Q3 and a second switch tube Q5, one end of the second energy storage inductor L2 is connected with the positive end of the lithium ion battery, the other end of the second energy storage inductor L2 is connected with one end of a second voltage-stabilizing tube Q3, the other end of the second voltage-stabilizing tube Q3 is connected with one end of an energy storage capacitor C1, one end of the second switch tube Q5 is connected with the other end of a second energy storage inductor L2, and the other end of the second switch tube Q5 is connected with the negative end of the lithium ion battery.

The unidirectional boosting DCDC further comprises a third boosting circuit, wherein the third boosting circuit comprises a third energy storage inductor L3, a third voltage-stabilizing tube Q1 and a third switching tube Q4, one end of the third energy storage inductor L3 is connected with the positive electrode end of the lithium ion battery, the other end of the third energy storage inductor L3 is connected with one end of a third voltage-stabilizing tube Q1, the other end of the third voltage-stabilizing tube Q1 is connected with one end of an energy storage capacitor C1, one end of the third switching tube Q4 is connected with the other end of a third energy storage inductor L3, and the other end of the third switching tube Q4 is connected with the negative electrode end of the lithium ion battery.

The unidirectional boost DCDC further comprises a fuse F and a switch S1, wherein one end of the fuse F is connected with one end of the energy storage capacitor C1, the other end of the fuse F is connected with the switch S1, and the other end of the switch S1 is connected with the other end of the energy storage capacitor C1.

One-way DCDC that steps up is the core of the utility model. When the voltage of the super capacitor is lower or obviously lower than that of the lithium ion battery system, the unidirectional boost DCDC supplements the electric energy for the super capacitor through the circuit shown in FIG. 2. Because the charging current is relatively large in the process, three equivalent booster circuits are preferentially used for shunting the one-way boosting DCDC to ensure the charging efficiency and the equipment safety.

Since the three equivalent voltage boosting circuits are identical, the first voltage boosting circuit is taken as an example to explain the working process. When the first switch tube Q6 is turned on, the first voltage regulator tube Q2 and subsequent circuits are in a short circuit state, the lithium ion battery charges the first energy storage inductor L1, when the first switch tube Q6 is turned off, the first energy storage inductor L1 forms a potential in the same direction as the lithium ion battery system, the two potentials are superposed to form more voltage to supply power to the energy storage capacitor C1 and an external load, and the reason why the voltage of the circuit can rise is also the root cause. Therefore, in the process of switching on and off the first switch tube Q6, the second switch tube Q5 and the third switch tube Q4, the first energy storage inductor L1, the second energy storage inductor L2 and the third energy storage inductor L3 raise the voltage of the lithium ion battery system to the charging voltage level of the super capacitor, and the super capacitor is charged together with the energy storage capacitor C1.

The anti-reverse diode is used as a one-way conduction device and has the function of only allowing the lithium battery to charge the super capacitor and not operating the super capacitor to charge the lithium battery. Therefore, the system is ensured to continuously have high power output capability, and the lithium ion battery system can avoid frequent charging and discharging so as to prolong the service life of the lithium ion battery system.

Claims

1. New forms of energy boats and ships electrical power generating system based on semi-active structure of one-way step-up DCDC, its characterized in that includes:

2. The new energy marine power supply system based on the semi-active structure of the unidirectional boost DCDC according to claim 1, wherein the unidirectional boost DCDC comprises an energy storage capacitor (C1) and at least a first boost circuit, the first boost circuit comprising:

the lithium ion battery energy storage circuit comprises a first energy storage inductor (L1), a first voltage-stabilizing tube (Q2) and a first switch tube (Q6), wherein one end of the first energy storage inductor (L1) is connected with the positive end of a lithium ion battery, the other end of the first energy storage inductor (L1) is connected with one end of a first voltage-stabilizing tube (Q2), the other end of the first voltage-stabilizing tube (Q2) is connected with one end of an energy storage capacitor (C1), the other end of the energy storage capacitor (C1) is connected with the positive end of the lithium ion battery, one end of the first switch tube (Q6) is connected with the other end of the first energy storage inductor (L1), and the other end of the first switch tube (Q6) is connected with the negative end of the lithium ion battery.

3. The new energy ship power supply system based on the unidirectional boost DCDC semi-active structure of claim 2, characterized in that the unidirectional boost DCDC further comprises a second boost circuit, the second boost circuit comprising:

the lithium ion battery comprises a second energy storage inductor (L2), a second voltage-stabilizing tube (Q3) and a second switch tube (Q5), wherein one end of the second energy storage inductor (L2) is connected with the positive electrode end of the lithium ion battery, the other end of the second energy storage inductor (L2) is connected with one end of the second voltage-stabilizing tube (Q3), the other end of the second voltage-stabilizing tube (Q3) is connected with one end of an energy storage capacitor (C1), one end of the second switch tube (Q5) is connected with the other end of the second energy storage inductor (L2), and the other end of the second switch tube (Q5) is connected with the negative electrode end of the lithium ion battery.

4. The new energy ship power supply system based on the one-way boost DCDC semi-active structure of claim 2 or 3, characterized in that the one-way boost DCDC further comprises a third boost circuit, the third boost circuit comprises:

the lithium ion battery comprises a third energy storage inductor (L3), a third voltage-stabilizing tube (Q1) and a third switching tube (Q4), wherein one end of the third energy storage inductor (L3) is connected with the positive electrode end of the lithium ion battery, the other end of the third energy storage inductor (L3) is connected with one end of the third voltage-stabilizing tube (Q1), the other end of the third voltage-stabilizing tube (Q1) is connected with one end of an energy storage capacitor (C1), one end of the third switching tube (Q4) is connected with the other end of the third energy storage inductor (L3), and the other end of the third switching tube (Q4) is connected with the negative electrode end of the lithium ion battery.

5. The new energy ship power supply system based on the semi-active structure of the unidirectional boost DCDC of claim 2, wherein the unidirectional boost DCDC further comprises a fuse (F) and a switch (S1), one end of the fuse (F) is connected with one end of the energy storage capacitor (C1), the other end of the fuse (F) is connected with the switch (S1), and the other end of the switch (S1) is connected with the other end of the energy storage capacitor (C1).