Pure electric ship heat energy recovery system

Abstract

The utility model discloses a heat energy recovery system of a pure electric ship. The pure electric ship comprises a BMS and an upper computer, and the BMS controls a battery pack; the heat energy recovery system is provided with a hot water storage box and a cabin signal acquisition box; the hot water storage tank is connected with the cabin signal acquisition box through a plurality of signal circuits; the cabin signal acquisition box is connected with the upper computer through a signal circuit; and the hot water storage tank is respectively communicated with the battery pack and a crew living and working area of the pure electric ship through water outlet pipelines. By the adoption of the technical scheme, the hot water storage tank is used for conducting feedback on the area, needing heat energy, of the whole ship, the battery using efficiency is greatly improved, heat energy recycling is achieved, the production cost is reduced, and economic benefits are improved; heat energy of the propulsion motor is stored, a battery pack is preheated before the electric ship operates, and harm caused by the too low temperature of a ship electric power system is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of ship transportation, and relates to energy management technology for ship power systems. More specifically, the present invention relates to a heat recovery system for a pure electric ship. Background Art

[0002] Purely electric vessels are primarily used on inland waterways and offshore waterways, primarily in the subtropical and warm zones. These temperature zones experience significant seasonal fluctuations and large diurnal temperature differences. Existing diesel-engined vessels primarily rely on boilers for heating, mitigating the effects of low temperatures.

[0003] The ship's electric propulsion system generates a large amount of heat energy when in operation. The existing technology uses water glycol as a cooling medium to cool the propulsion motor through a cooling water system. The electric propulsion motor generates a large amount of heat energy when working. In universal ship design, the output temperature of the cooling water system will reach about 60°C, and the flow rate will be relatively high.

[0004] The problems and defects of the prior art are:

[0005] Existing pure electric ships have a high degree of automation and a complete power system, but they do not fully consider the losses and impacts of low temperatures on the ship's power system.

[0006] The cooling water systems in traditional ships, after absorbing heat energy, mostly exchange it with river water, causing a huge loss of heat energy and further reducing battery efficiency.

[0007] The existing battery packs mainly rely on lithium batteries. According to the theory of physical chemistry, the discharge process of the battery pack is a spontaneous process and an entropy increase change. At room temperature, molecular movement can better enter a disordered state, and the lithium battery has higher working efficiency. However, on inland river routes in winter, the lithium battery pack is in a low temperature environment, the discharge process is more difficult and will reduce the working efficiency of the lithium battery.

[0008] Using keywords such as "ship; electric; thermal energy; recovery; control" to search existing public technical literature, the following search results were obtained:

[0009] 1. Chinese patent document: "A propulsion motor speed control method for a ship power switching system", patent (application) number: 202410750178.1; the technical solution described therein is:

[0010] "A propulsion motor speed control method for a ship power switching system integrates solar power generation, wind power generation, and hydropower generation to form a comprehensive clean energy supply unit. Operators monitor the propulsion motor status through a user interface. The power supply and voltage are adjusted during operation to achieve stepless speed regulation of the propulsion motor. Closed-loop control is implemented using current and speed feedback. A safety protection unit ensures safe and reliable operation of the propulsion motor speed control. A cooling protection unit maintains the propulsion motor temperature within a safe range. When the ship needs to slow down or stop, a combination of regenerative braking and dynamic braking is used to achieve energy recovery."

[0011] The technical effects recorded are:

[0012] "By integrating solar power generation, wind power generation and hydropower generation to form a comprehensive clean energy supply unit, the proportion of various energy sources can be flexibly adjusted according to actual conditions to ensure stable operation of the propulsion motor."

[0013] 2. Chinese patent document: "A combined cooling, heating and power system based on an ammonia energy ship", patent (application) number: 202020244738.3; the technical solution described therein is:

[0014] The combined cooling, heating, and power (CCHP) system for ammonia-based ships includes a hydrogen production system, a ship power supply system, and a heat and cold energy recovery and heat exchange circulation system. The hydrogen production system includes a ship-mounted liquid ammonia storage tank, a flow control valve group, a vaporizer, a pressure control valve group, a filter drier, an ammonia preheater, an electric heater, an ammonia catalytic decomposition hydrogen separation unit, a hydrogen purifier, a hydrogen cooler, and a hydrogen pressure and flow control valve group, which are connected in sequence. The ship power supply system includes a hydrogen-air fuel cell, an electric motor propeller, and a battery. The heat and cold energy recovery and heat exchange circulation system includes a waste heat boiler and a refrigerant pump. The waste heat boiler is used to generate saturated steam to supply the heat needs of the ship's auxiliary engines and passenger cabins. The refrigerant pump is used to cool the ship's equipment and meet the ship's related cooling needs.

[0015] The technical effects recorded are:

[0016] "Solve the problem of separating hydrogen production and storage technology, which causes massive energy consumption."

[0017] However, the technical solutions recorded in the above-mentioned technical documents and the existing publicly applied related technical solutions have not been able to solve the problems and defects existing in the existing technology, such as "full recovery and utilization of heat energy" and "loss and impact caused by low temperature on the ship's power system". Utility Model Content

[0018] The utility model provides a pure electric ship heat energy recovery system, the purpose of which is to realize the recovery and utilization of heat energy.

[0019] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0020] The utility model discloses a heat recovery system for a pure electric ship, wherein the pure electric ship includes a BMS and a host computer, wherein the BMS controls the battery pack; the heat recovery system is provided with a hot water storage tank and an engine room signal acquisition box; the hot water storage tank is connected to the engine room signal acquisition box via multiple signal circuits; the engine room signal acquisition box is connected to the host computer via a control signal circuit; the hot water storage tank is connected to the battery pack and the living and working areas of the crew of the pure electric ship respectively through water outlet pipes.

[0021] The BMS is connected to the host computer via a battery status signal circuit, and the BMS provides battery pack status information to the host computer via the signal circuit.

[0022] A water tank inlet temperature sensor is provided on the water inlet pipe of the hot water storage tank; the water tank inlet temperature sensor is connected to the cabin signal acquisition box via a water tank inlet temperature signal circuit.

[0023] A water tank inlet flow rate sensor is provided on the water inlet pipe of the hot water storage tank; the water tank inlet flow rate sensor is connected to the cabin signal acquisition box through a water tank inlet flow rate signal circuit.

[0024] A water tank water inlet electro-hydraulic control valve is provided on the water inlet pipe of the hot water storage tank; the water tank water inlet electro-hydraulic control valve is connected to the cabin signal acquisition box through a water tank water inlet control signal circuit.

[0025] A liquid level sensor is provided inside the hot water storage tank; the liquid level sensor is connected to the cabin signal acquisition box through a water tank liquid level signal circuit.

[0026] A water tank temperature sensor is arranged inside the hot water storage tank; the water tank temperature sensor is connected to the cabin signal acquisition box through a water tank temperature signal circuit.

[0027] A battery pack water flow electro-hydraulic control valve is provided on the water outlet pipe from the hot water storage tank to the battery pack; the battery pack water flow electro-hydraulic control valve is connected to the cabin signal acquisition box through the battery pack water flow control signal circuit.

[0028] A cabin water flow electro-hydraulic control valve is provided on the outlet pipe from the hot water storage tank to the crew's living and working areas; the cabin water flow electro-hydraulic control valve is connected to the engine room signal acquisition box through a cabin water flow control signal circuit.

[0029] The heat energy recovery system is provided with a system master valve switch button; the system master valve switch button is connected to the cabin signal acquisition box through a master valve control signal circuit.

[0030] The utility model adopts the above technical solution, and "feeds back" to the areas of the entire ship that need heat energy through the hot water storage tank, which greatly improves the efficiency of battery use, realizes the recycling of heat energy, reduces production costs, and improves economic benefits; stores the heat energy of the propulsion motor, preheats the battery pack before the electric ship is operated, and redirects the heat energy transmission without damaging the electric energy; avoids the damage caused by the excessively low temperature of the ship's power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The contents shown in the accompanying drawings and the symbols in the drawings are briefly described as follows:

[0032] Figure 1 It is a structural diagram of the utility model;

[0033] Figure 2 This is the signal transmission route map of the present invention.

[0034] The following are marked in the figure:

[0035] 1. Hot water storage tank, 2. Engine room signal acquisition box, 3. Host computer, 4. System main valve switch button, 5. BMS, 6. Water tank inlet temperature sensor, 7. Water tank inlet flow rate sensor, 8. Liquid level sensor, 9. Water tank temperature sensor, 10. Water tank inlet electro-hydraulic control valve, 11. Battery pack water flow electro-hydraulic control valve, 12. Cabin water flow electro-hydraulic control valve. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0037] like Figure 1 The structure of the utility model shown in FIG. Figure 2 The signal transmission relationship of the present invention is shown as follows. The present invention is a heat recovery system for a pure electric ship. The pure electric ship includes a BMS5 (battery management system) and a host computer 3. The BMS5 controls the working state of the battery pack.

[0038] In order to solve the problems existing in the prior art and overcome its defects and realize the invention purpose of heat energy recovery and utilization, the technical solution adopted by the utility model is as follows:

[0039] like Figure 1As shown, the heat recovery system of a pure electric ship of the present invention is provided with a hot water storage tank 1 and a cabin signal acquisition box 2; the hot water storage tank 1 is connected to the cabin signal acquisition box 2 through multiple signal circuits; the cabin signal acquisition box 2 is connected to the host computer 3 through a control signal circuit; the hot water storage tank 1 is connected to the battery pack and the living and working areas of the crew of the pure electric ship through water outlet pipes.

[0040] The utility model adds a pipe outlet to the cooling water system and sets a plurality of sensors (including temperature sensors, flow rate sensors and liquid level sensors) at the control position, which are passed into the hot water storage tank 1 and connected to the ship areas that need heat energy under low temperature conditions, such as the crew room and container battery pack, to recover and utilize heat energy, reduce production costs and improve economic benefits; with the help of the hot water storage tank 1, "feedback" is carried out to the areas of the entire ship that need heat energy, greatly improving the battery utilization efficiency and achieving cost reduction and efficiency improvement; the heat energy transmission is redirected and the electric energy is not damaged; through the above technical solution, the heat energy of the propulsion motor is stored, and the battery pack is preheated before the electric ship is operated.

[0041] The BMS 5 is connected to the host computer 3 via a battery status signal circuit. The BMS 5 provides battery pack status information to the host computer 3 via the signal circuit. The host computer 3 determines the heat recovery method and specific parameters based on the battery pack status information transmitted by the BMS 5.

[0042] A water tank inlet temperature sensor 6 is provided on the water inlet pipe of the hot water storage tank 1 ; the water tank inlet temperature sensor 6 is connected to the cabin signal acquisition box 2 via a water tank inlet temperature signal circuit.

[0043] The water tank inlet temperature sensor 6 obtains a temperature signal on the water inlet pipe of the hot water storage tank 1 .

[0044] A water tank temperature sensor 9 is provided inside the hot water storage tank 1 ; the water tank temperature sensor 9 is connected to the engine room signal acquisition box 2 via a water tank temperature signal circuit.

[0045] The water tank temperature sensor 9 obtains a temperature signal inside the hot water storage tank 1 .

[0046] Water tank inlet temperature sensor 6 and water tank temperature sensor 9: measuring the cooling water temperature is the first instruction for the host computer 3 to determine whether the water tank inlet electro-hydraulic control valve 10 can be switched on or off.

[0047] A liquid level sensor 8 is provided inside the hot water storage tank 1 ; the liquid level sensor 8 is connected to the engine room signal acquisition box 2 via a water tank liquid level signal circuit.

[0048] The liquid level sensor 8 is used to determine whether the hot water storage tank 1 is full of stored liquid. It is the second instruction for the host computer 3 to determine whether the water tank water inlet electro-hydraulic control valve 10 is switched on or off.

[0049] A water tank inlet flow rate sensor 7 is provided on the water inlet pipe of the hot water storage tank 1; the water tank inlet flow rate sensor 7 is connected to the cabin signal acquisition box 2 via a water tank inlet flow rate signal circuit.

[0050] The water tank inlet flow rate sensor 7 is used to determine the cooling water flow rate.

[0051] A water tank water inlet electro-hydraulic control valve 10 is provided on the water inlet pipe of the hot water storage tank 1; the water tank water inlet electro-hydraulic control valve 10 is connected to the cabin signal acquisition box 2 through a water tank water inlet control signal circuit.

[0052] When the two instructions above determine that the water tank water inlet electro-hydraulic control valve 10 is open, the host computer 3 determines the opening degree of the water tank water inlet electro-hydraulic control valve 10 through the water tank water inlet flow rate sensor 7. The water tank water inlet electro-hydraulic control valve 10 is an opening type electro-hydraulic control valve, and the opening degree of the water tank water inlet electro-hydraulic control valve 10 is controlled according to the judgment.

[0053] A battery pack water flow electro-hydraulic control valve 11 is provided on the water outlet pipe from the hot water storage tank 1 to the battery pack; the battery pack water flow electro-hydraulic control valve 11 is connected to the cabin signal acquisition box 2 via a battery pack water flow control signal circuit.

[0054] A cabin water flow electro-hydraulic control valve 12 is provided on the outlet pipe from the hot water storage tank 1 to the crew's living and working areas; the cabin water flow electro-hydraulic control valve 12 is connected to the engine room signal acquisition box 2 via a cabin water flow control signal circuit.

[0055] The battery pack water flow electro-hydraulic control valve 11 and the cabin water flow electro-hydraulic control valve 12 are both switch-type electro-hydraulic control valves, whose valve cores have two positions of open and closed, respectively achieving the purpose of supplying heat energy to the battery pack and the crew's living and working areas.

[0056] The heat energy recovery system is provided with a system master valve switch button 4; the system master valve switch button 4 is connected to the cabin signal acquisition box 2 through a master valve control signal circuit.

[0057] The operation of the entire system is started or shut down through the system master valve switch button 4 and the host computer 3, and the overall control of each control valve of the heat recovery system is performed.

[0058] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A heat recovery system for a pure electric ship, comprising a BMS (5) and a host computer (3), wherein the BMS (5) controls a battery pack, and is characterized in that: The heat energy recovery system is provided with a hot water storage tank (1) and a cabin signal acquisition box (2); the hot water storage tank (1) is connected to the cabin signal acquisition box (2) via a plurality of signal circuits; the cabin signal acquisition box (2) is connected to a host computer (3) via a control signal circuit; the hot water storage tank (1) is connected to a battery pack and a living and working area of ​​a crew of a pure electric vessel via a water outlet pipe.

2. The heat recovery system for a pure electric ship according to claim 1, characterized in that: The BMS (5) is connected to the host computer (3) via a battery status signal circuit, and the BMS (5) provides battery pack status information to the host computer (3) via the signal circuit.

3. The heat recovery system for a pure electric ship according to claim 1, characterized in that: A water tank inlet temperature sensor (6) is provided on the water inlet pipe of the hot water storage tank (1); the water tank inlet temperature sensor (6) is connected to the engine room signal acquisition box (2) via a water tank inlet temperature signal circuit.

4. The heat recovery system for a pure electric ship according to claim 1, characterized in that: A water tank inlet flow rate sensor (7) is provided on the water inlet pipe of the hot water storage tank (1); the water tank inlet flow rate sensor (7) is connected to the cabin signal acquisition box (2) via a water tank inlet flow rate signal circuit.

5. The heat recovery system for a pure electric ship according to claim 1, characterized in that: A water tank water inlet electro-hydraulic control valve (10) is provided on the water inlet pipe of the hot water storage tank (1); the water tank water inlet electro-hydraulic control valve (10) is connected to the cabin signal acquisition box (2) via a water tank water inlet control signal circuit.

6. The heat recovery system for a pure electric ship according to claim 1, characterized in that: A liquid level sensor (8) is provided inside the hot water storage tank (1); the liquid level sensor (8) is connected to the engine room signal acquisition box (2) via a water tank liquid level signal circuit.

7. The heat recovery system for a pure electric ship according to claim 1, characterized in that: A water tank temperature sensor (9) is provided inside the hot water storage tank (1); the water tank temperature sensor (9) is connected to the engine room signal acquisition box (2) via a water tank temperature signal circuit.

8. The heat recovery system for a pure electric ship according to claim 1, characterized in that: A battery pack water flow electro-hydraulic control valve (11) is provided on a water outlet pipe from the hot water storage tank (1) to the battery pack; the battery pack water flow electro-hydraulic control valve (11) is connected to a cabin signal acquisition box (2) via a battery pack water flow control signal circuit.

9. The heat recovery system for a pure electric ship according to claim 1, characterized in that: A cabin water flow electro-hydraulic control valve (12) is provided on the water outlet pipe from the hot water storage tank (1) to the crew's living and working areas; the cabin water flow electro-hydraulic control valve (12) is connected to the engine room signal acquisition box (2) via a cabin water flow control signal circuit.

10. The pure electric ship heat recovery system according to claim 1, characterized in that: The heat energy recovery system is provided with a system master valve switch button (4); the system master valve switch button (4) is connected to the cabin signal acquisition box (2) via a master valve control signal circuit.

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