Waterproof air-cooled heat dissipation marine power battery pack and heat dissipation control method thereof

Abstract

The invention discloses a waterproof air-cooled heat dissipation marine power battery pack and a heat dissipation control method thereof, and relates to the technical field of battery equipment. The device comprises a sealing shell, wherein a storage battery is arranged in the sealing shell; a cooling assembly is arranged in the sealing shell and comprises a fixing shell installed in the sealing shell and heat exchange pipes installed on the two sides of the fixing shell. Through the synergistic effect of the cooling assembly and the air cooling assembly, the problem that the marine power battery pack is low in heat dissipation efficiency in a closed environment is effectively solved, cooling liquid circularly flows in the heat exchange pipe and is matched with the heat conduction silica gel sheet to directly absorb heat generated by the storage battery, efficient liquid cooling heat dissipation is achieved, and the service life of the marine power battery pack is prolonged. Flowing cooling liquid drives turbine blades to drive exhaust fan blades to rotate, forced air cooling is formed, the heat exchange area is increased through heat dissipation fins, the heat dissipation efficiency is further improved, stable operation can still be achieved under the ship vibration and damp working conditions, the service life of a battery is remarkably prolonged, and safety is improved.

Description

Technical Field

[0001] This invention belongs to the field of battery equipment technology, and in particular relates to a waterproof, air-cooled marine power battery pack and its heat dissipation control method. Background Technology

[0002] Marine power battery packs are the core power source for ship electrification, primarily using lithium iron phosphate and ternary lithium batteries, which possess high energy density, long cycle life, and safe and stable characteristics. They integrate a BMS (Battery Management System) for overcharge / discharge protection, temperature monitoring, and equalization control, adapting to the complex operating conditions of ships. Compared to traditional fuel oil, they can reduce carbon emissions by over 90% and noise by 70%, making them suitable for inland river cruise ships, port tugboats, and near-shore cargo ships.

[0003] A Chinese patent application (or patent) with publication number CN111490204B discloses a marine power battery power supply cabinet, including a cabinet body and multiple drawers for installing power battery packs. The bottom of the cabinet body is provided with a mounting base for mounting and fixing to the hull deck. The cabinet body is provided with multiple mounting cavities, each of which is spaced vertically along the height of the cabinet body. Each mounting cavity is provided with a slide rail, and the bottom of each drawer is provided with a roller that slides and engages with the slide rail.

[0004] However, the above-mentioned device still has the following problems during implementation: When batteries are assembled inside a casing, during long-term charging and discharging, the internal resistance of the cells generates heat and the chemical reactions release heat, continuously releasing a large amount of heat. Because the casing is relatively enclosed, the heat is difficult to dissipate quickly and tends to accumulate inside, causing the battery pack temperature to gradually rise. If the temperature rise becomes uncontrolled, it will not only accelerate cell aging and reduce cycle life, but may also trigger thermal runaway, threatening the safety of the ship's propulsion.

[0005] To address these issues, we provide a waterproof, air-cooled marine power battery pack and its heat dissipation control method. Summary of the Invention

[0006] The purpose of this invention is to provide a waterproof, air-cooled marine power battery pack and its heat dissipation control method. By coordinating the structure of the cooling component, the air-cooling component and the heat exchange component, the invention solves the problem in the prior art where the battery pack casing is relatively enclosed and heat is difficult to dissipate quickly.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0008] This invention relates to a waterproof, air-cooled marine power battery pack and its heat dissipation control method, comprising a sealed shell containing a battery; a cooling assembly inside the sealed shell, the cooling assembly including a fixed shell installed inside the sealed shell, heat exchange tubes installed on both sides of the fixed shell, an inlet pipe and an outlet pipe installed inside the fixed shell, a first branch pipe connected to one end of the inlet pipe, and a second branch pipe connected to one end of the outlet pipe, the cooling assembly circulating coolant into the heat exchange tubes; and a fan is provided at the top of the sealed shell. The cooling assembly includes a top shell mounted on the top of the sealed housing, an exhaust shell mounted inside the top shell, a rotating shaft movably connected inside the exhaust shell, exhaust fan blades mounted on the surface of the rotating shaft, and heat dissipation fins mounted inside the top shell. The cooling assembly accelerates the dissipation of heat from the battery. A heat exchange assembly is provided on one side of the sealed housing. The heat exchange assembly includes a micro pump located on one side of the sealed housing, a drain pipe connected to the outlet of the micro pump, a circulation pipe connected to the inlet of the micro pump, and a heat exchanger connected to the other end of the circulation pipe.

[0009] The present invention is further configured such that the air-cooled assembly includes a support shell installed inside the water inlet pipe, turbine blades disposed inside the support shell, the other end of the rotating shaft passing through the support shell and fixedly connected to the turbine blades, and the heat exchanger and the water outlet pipe being connected by a pipe.

[0010] The present invention is further configured such that the bottom of the heat dissipation fins extends into the interior of the sealing shell, and air inlets are provided on both sides of the exhaust shell.

[0011] The present invention is further configured such that a filter screen is provided on both sides of the heat dissipation fins, and both sides of the filter screen are fixedly connected to the inner wall of the top shell.

[0012] The present invention is further configured such that both ends of the first water distribution pipe are connected to heat exchange pipes, and both ends of the second water distribution pipe are connected to heat exchange pipes, forming a circulating water circuit.

[0013] The present invention is further configured such that a thermally conductive silicone sheet is fixedly connected inside the heat exchange tube, and one side of the thermally conductive silicone sheet is in contact with the battery.

[0014] The invention is further configured such that an isolation plate is fixedly connected inside the heat exchange tube for diverting the coolant.

[0015] The present invention is further configured such that a temperature sensor is fixedly connected inside the sealed shell, and the temperature sensor is electrically connected to an external PLC controller.

[0016] The present invention is further configured such that a dust-proof mesh is fixedly connected inside the exhaust shell, and reinforcing rods are fixedly connected to both sides of the sealing shell.

[0017] A method for controlling the heat dissipation of a waterproof, air-cooled marine power battery pack includes the following steps; S1: When the battery is working, the temperature sensor detects the battery's operating temperature. When the temperature sensor detects that the battery temperature is higher than the set value, the external PLC controller receives the signal from the temperature sensor and simultaneously starts the micro pump and heat exchanger. The heat exchanger cools the internal coolant, and the micro pump draws out the coolant from the heat exchanger and injects it into the water inlet pipe. S2: The coolant entering the inlet pipe passes through the first water distribution pipe, which groups the coolant into two sets of heat exchange tubes. The thermally conductive silicone pads contact the surface of the battery to conduct heat from the battery. The coolant flowing inside the heat exchange tubes carries away the conducted heat, improving the cooling effect on the battery. The heat exchange tubes have a bent design, which allows for circulating heat conduction inside the battery pack. The coolant that carries away heat is introduced into the outlet pipe through the heat exchange tubes, and then discharged back into the heat exchanger through the second water distribution pipe, the outlet pipe, and the circulation pipe. The heat exchanger then cools the coolant, achieving the effect of circulating cooling. S3: When the coolant flows through the inlet pipe and the support housing, the flowing coolant can drive the turbine blades to rotate. The turbine blades, together with the rotating shaft, drive the exhaust fan blades to rotate. The exhaust fan blades drive the airflow, drawing in external air through the top housing and air inlet. The heat dissipation fins are installed inside the top housing, with the bottom of the heat dissipation fins extending into the sealed housing. They can absorb the heat generated by the battery and increase the heat dissipation area through the heat dissipation fins. The flowing air carries away the heat from the heat dissipation fins, further improving the heat dissipation effect.

[0018] The present invention has the following beneficial effects: Through the synergistic effect of the cooling component and the air-cooling component, the present invention effectively solves the problem of low heat dissipation efficiency of marine power battery packs in a closed environment. The coolant circulates in the heat exchange tube and directly absorbs the heat generated by the battery with the help of the thermally conductive silicone sheet, so as to achieve efficient liquid cooling. The flowing coolant drives the turbine blades to drive the exhaust fan blades to rotate, forming forced air cooling. The heat exchange area is increased by the heat dissipation fins, which further improves the heat dissipation efficiency. It can still operate stably under ship vibration and humid conditions, significantly extending battery life and improving safety. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0020] Figure 1 A perspective view of a waterproof, air-cooled marine power battery pack and its heat dissipation control method.

[0021] Figure 2 This is a cross-sectional view of the sealed shell in a waterproof, air-cooled marine power battery pack and its heat dissipation control method.

[0022] Figure 3 This is a cross-sectional view of the top shell of a waterproof, air-cooled marine power battery pack and its heat dissipation control method.

[0023] Figure 4 This is a cross-sectional view of the fixed shell in a waterproof, air-cooled marine power battery pack and its heat dissipation control method.

[0024] Figure 5 This is a cross-sectional view of the support shell in a waterproof, air-cooled marine power battery pack and its heat dissipation control method.

[0025] Figure 6 This is a schematic diagram showing the connection of the heat exchange pipe, the first water distribution pipe, and the second water distribution pipe in a waterproof, air-cooled marine power battery pack and its heat dissipation control method.

[0026] Figure 7 This is a cross-sectional view of the heat exchange tubes in a waterproof, air-cooled marine power battery pack and its heat dissipation control method.

[0027] In the attached diagram: 1. Sealed shell; 2. Battery; 3. Cooling assembly; 301. Fixed shell; 302. Heat exchange tube; 303. Water inlet pipe; 304. Water outlet pipe; 305. First water distribution pipe; 306. Second water distribution pipe; 4. Air-cooled assembly; 401. Top shell; 402. Exhaust shell; 403. Rotating shaft; 404. Exhaust fan blade; 405. Heat dissipation fins; 5. Heat exchange assembly; 501. Micro pump; 502. Drain pipe; 503. Circulation pipe; 504. Heat exchanger; 406. Support shell; 407. Turbine blade; 6. Air inlet; 7. Filter screen; 8. Thermally conductive silicone sheet; 9. Isolation plate; 10. Temperature sensor; 11. Dust filter; 12. Reinforcing rod. Detailed Implementation

[0028] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments. Example

[0029] Please see Figures 1-7This invention relates to a waterproof, air-cooled marine power battery pack and its heat dissipation control method, comprising a sealed shell 1, inside which a battery 2 is installed; a cooling assembly 3 is installed inside the sealed shell 1, the cooling assembly 3 including a fixed shell 301 installed inside the sealed shell 1, heat exchange pipes 302 installed on both sides of the fixed shell 301, an inlet pipe 303 and an outlet pipe 304 installed inside the fixed shell 301, a first branch pipe 305 connected to one end of the inlet pipe 303, and a second branch pipe 306 connected to one end of the outlet pipe 304, through which coolant is circulated into the heat exchange pipes 302; an air-cooling assembly 4 is installed on the top of the sealed shell 1. Component 4 includes a top shell 401 installed on the top of the sealed shell 1, an exhaust shell 402 installed inside the top shell 401, a rotating shaft 403 movably connected inside the exhaust shell 402, an exhaust fan blade 404 installed on the surface of the rotating shaft 403, and heat dissipation fins 405 installed inside the top shell 401. The heat dissipation of the battery 2 is accelerated by the air-cooling component 4. A heat exchange component 5 is provided on one side of the sealed shell 1. The heat exchange component 5 includes a micro pump 501 provided on one side of the sealed shell 1, a drain pipe 502 connected to the outlet of the micro pump 501, a circulation pipe 503 connected to the inlet of the micro pump 501, and a heat exchanger 504 connected to the other end of the circulation pipe 503.

[0030] Specifically: the sealing shell 1 can effectively isolate external moisture and dust intrusion, ensuring the safe and stable operation of the battery 2 in the humid environment of the ship. The heat exchange tube 302 adopts a bent arrangement, which can tightly surround the battery 2, increasing the contact area and thus efficiently conducting heat. The inlet pipe 303 and the outlet pipe 304 form the main path for coolant flow. Together with the first branch pipe 305 and the second branch pipe 306, the coolant is divided and merged, so that the cooling is evenly covered by multiple branches of the heat exchange tube 302, avoiding local overheating. The top shell 401 provides the installation base for the upper heat dissipation structure. Its internal cavity guides the airflow. The exhaust shell 402 accommodates the rotating shaft 403 and the fan blades, ensuring the stability of the fan during operation. The rotating shaft 403 connects the turbine blades 407 and the exhaust fan blades 404 to realize power transmission. When the exhaust fan blades 404 rotate, they generate forced airflow, accelerating the discharge of internal heat to the outside. Example

[0031] Please see Figures 1-7Based on Embodiment 1, the air-cooled assembly 4 further includes a support shell 406 installed inside the water inlet pipe 303, a turbine blade 407 disposed inside the support shell 406, the other end of the rotating shaft 403 passing through the support shell 406 and fixedly connected to the turbine blade 407, the heat exchanger 504 and the water outlet pipe 304 being connected by a pipe, the bottom of the heat dissipation fins 405 passing through the sealed shell 1, air inlets 6 being provided on both sides of the exhaust shell 402, filters 7 being provided on both sides of the heat dissipation fins 405, the filters 7 being fixedly connected to the inner wall of the top shell 401 on both sides, the first water distribution pipe 305 being connected to the heat exchange pipe 302 at both ends, and the second water distribution pipe 306 being connected to the heat exchange pipe 302 at both ends, forming a circulating water circuit.

[0032] Specifically: The bottom of the heat dissipation fins 405 extends into the interior of the sealed shell 1, directly absorbing the heat generated by the battery 2, and enhancing the air heat exchange efficiency through its large-area fin structure. The micro pump 501 provides power for the coolant circulation, ensuring the coolant continues to flow in the system. The drain pipe 502 and the circulation pipe 503 form a closed loop, allowing the coolant to be fully cooled in the heat exchanger 504 before re-entering the battery 2. The heat exchanger 504 cools the returning high-temperature coolant, maintaining the coolant at a low temperature and ensuring continuous heat dissipation. The support shell 406 houses turbine blades 407, which use the kinetic energy of the coolant flow to drive the blades to rotate, enabling the exhaust fan blades 404 to work without additional power, thus achieving energy recovery. Example

[0033] Please see Figures 1-7 Based on Embodiments 1 and 2, a thermally conductive silicone sheet 8 is fixedly connected inside the heat exchange tube 302, one side of which is in contact with the battery 2. An isolation plate 9 is fixedly connected inside the heat exchange tube 302 for diverting coolant. A temperature sensor 10 is fixedly connected inside the sealing shell 1 and is electrically connected to an external PLC controller. A dust filter 11 is fixedly connected inside the exhaust shell 402. Reinforcing rods 12 are fixedly connected to both sides of the sealing shell 1.

[0034] Specifically: the through-hole design at the bottom of the heat dissipation fins 405 allows heat to be directly conducted to the fin surface, combined with the air inlet 6 to introduce external air, forming convection cooling; the filter screen 7 can block debris from entering the air duct and keep the heat dissipation channel clean; the first water distribution pipe 305 and the second water distribution pipe 306 are connected to the heat exchange pipe 302 to form a complete circulating water circuit, improving cooling efficiency; the thermally conductive silicone sheet 8 is filled between the heat exchange pipe 302 and the battery 2 to enhance heat conduction efficiency and reduce contact thermal resistance; the isolation plate 9 divides the coolant inside the heat exchange pipe 302 to avoid flow dead zones and improve heat exchange uniformity; the temperature sensor 10 monitors the temperature of the battery 2 in real time and automatically starts and stops the heat dissipation system through the PLC controller to achieve intelligent temperature control; the dust filter 11 prevents dust accumulation from affecting heat dissipation; and the reinforcing rod 12 enhances the overall structural strength of the sealing shell 1 and adapts to the vibration and impact during ship navigation.

[0035] The working principle of this invention is as follows: When the storage battery 2 is working, the temperature sensor 10 detects the working temperature of the storage battery 2. When the temperature sensor 10 detects that the temperature of the storage battery 2 is higher than the set value, the external PLC controller receives the signal from the temperature sensor 10 and simultaneously starts the micro pump 501 and the heat exchanger 504. The heat exchanger 504 cools the internal coolant, and the micro pump 501 draws out the coolant in the heat exchanger 504 and injects it into the water inlet pipe 303. The coolant entering the inlet pipe 303 passes through the first branch pipe 305, and is then grouped and discharged into two sets of heat exchange pipes 302. The thermally conductive silicone pads 8 are in contact with the surface of the battery 2 to conduct heat from the battery 2. The coolant flowing inside the heat exchange pipes 302 carries away the conducted heat, improving the cooling effect on the battery 2. The heat exchange pipes 302 are designed with bends to circulate and conduct heat inside the battery 2. The coolant that carries away heat is introduced through the heat exchange pipes 302 into the outlet pipe 304, and then discharged again into the heat exchanger 504 through the second branch pipe 306, the outlet pipe 304, and the circulation pipe 503, where it is cooled down, achieving the effect of circulating cooling. When the coolant flows through the inlet pipe 303 and the support shell 406, the flowing coolant can drive the turbine blades 407 to rotate. The turbine blades 407, together with the rotating shaft 403, drive the exhaust fan blades 404 to rotate. The exhaust fan blades 404 drive the airflow, drawing in external air through the top shell 401 and the air inlet 6. The heat dissipation fins 405 are installed inside the top shell 401, with the bottom of the heat dissipation fins 405 penetrating into the sealed shell 1. They can absorb the heat generated by the battery 2 and increase the heat dissipation area through the heat dissipation fins 405. The heat dissipation effect is further improved by the flowing air carrying away the heat from the heat dissipation fins 405.

[0036] The preferred embodiments of the present invention disclosed above are only for the purpose of illustrating the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation described herein. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention.

Claims

1. A waterproof, air-cooled marine power battery pack, comprising a sealed casing (1), characterized in that: A storage battery (2) is installed inside the sealed housing (1); The sealed shell (1) is provided with a cooling assembly (3). The cooling assembly (3) includes a fixed shell (301) installed inside the sealed shell (1), heat exchange tubes (302) installed on both sides of the fixed shell (301), an inlet pipe (303) and an outlet pipe (304) installed inside the fixed shell (301), a first branch pipe (305) connected to one end of the inlet pipe (303), and a second branch pipe (306) connected to one end of the outlet pipe (304). The cooling liquid is circulated into the heat exchange tubes (302) through the cooling assembly (3). The top of the sealed shell (1) is provided with a wind-cooling assembly (4). The wind-cooling assembly (4) includes a top shell (401) installed on the top of the sealed shell (1), an exhaust shell (402) installed inside the top shell (401), a rotating shaft (403) movably connected inside the exhaust shell (402), an exhaust fan blade (404) installed on the surface of the rotating shaft (403), and heat dissipation fins (405) installed inside the top shell (401). The wind-cooling assembly (4) accelerates the dissipation of heat from the battery (2). A heat exchange assembly (5) is provided on one side of the sealing shell (1). The heat exchange assembly (5) includes a micro pump (501) provided on one side of the sealing shell (1), a drain pipe (502) connected to the outlet of the micro pump (501), a circulation pipe (503) connected to the inlet of the micro pump (501), and a heat exchanger (504) connected to the other end of the circulation pipe (503).

2. The waterproof, air-cooled marine power battery pack according to claim 1, characterized in that: The air-cooled assembly (4) also includes a support shell (406) installed inside the water inlet pipe (303), a turbine blade (407) disposed inside the support shell (406), the other end of the rotating shaft (403) passing through the support shell (406) and fixedly connected to the turbine blade (407), and the heat exchanger (504) and the water outlet pipe (304) are connected by a pipe.

3. The waterproof, air-cooled marine power battery pack according to claim 1, characterized in that: The bottom of the heat dissipation fins (405) extends into the interior of the sealing shell (1), and air inlets (6) are provided on both sides of the exhaust shell (402).

4. The waterproof, air-cooled marine power battery pack according to claim 1, characterized in that: The heat dissipation fins (405) are provided with filters (7) on both sides, and the filters (7) are fixedly connected to the inner wall of the top shell (401) on both sides.

5. The waterproof, air-cooled marine power battery pack according to claim 1, characterized in that: Both ends of the first water distribution pipe (305) are connected to the heat exchange pipe (302), and both ends of the second water distribution pipe (306) are connected to the heat exchange pipe (302), forming a circulating water circuit.

6. The waterproof, air-cooled marine power battery pack according to claim 1, characterized in that: A thermally conductive silicone pad (8) is fixedly connected inside the heat exchange tube (302), and one side of the thermally conductive silicone pad (8) is in contact with the battery (2).

7. The waterproof, air-cooled marine power battery pack according to claim 1, characterized in that: An isolation plate (9) is fixedly connected inside the heat exchange tube (302) for diverting the coolant.

8. The waterproof, air-cooled marine power battery pack according to claim 1, characterized in that: A temperature sensor (10) is fixedly connected inside the sealed housing (1), and the temperature sensor (10) is electrically connected to an external PLC controller.

9. The waterproof, air-cooled marine power battery pack according to claim 1, characterized in that: The exhaust shell (402) is fixedly connected to a dustproof net (11), and the sealing shell (1) is fixedly connected to both sides with reinforcing rods (12).

10. A method for controlling the heat dissipation of a waterproof, air-cooled marine power battery pack, based on the waterproof, air-cooled marine power battery pack according to any one of claims 1-9, characterized in that, Includes the following steps; S1: When the battery (2) is working, the working temperature of the battery (2) is detected by the temperature sensor (10). When the temperature sensor (10) detects that the temperature of the battery (2) is higher than the set value, the external PLC controller receives the signal from the temperature sensor (10) and starts the micro pump (501) and heat exchanger (504) simultaneously. The heat exchanger (504) cools down the internal coolant. The micro pump (501) draws out the coolant in the heat exchanger (504) and injects it into the water inlet pipe (303). S2: The coolant entering the inlet pipe (303) passes through the first branch pipe (305) and is discharged into two sets of heat exchange pipes (302) in groups. The thermally conductive silicone sheet (8) contacts the surface of the battery (2) to conduct heat from the battery (2). The coolant flowing inside the heat exchange pipe (302) carries away the conducted heat, improving the cooling effect on the battery (2). The heat exchange pipe (302) is designed with bends, which can circulate and conduct heat inside the battery (2) group. The coolant that carries away heat is introduced into the outlet pipe (304) through the heat exchange pipe (302), and then discharged back into the heat exchanger (504) through the second branch pipe (306), the outlet pipe (304) and the circulation pipe (503). The heat exchanger (504) cools the water and achieves the effect of circulating cooling. S3: When the coolant flows through the inlet pipe (303) and the support shell (406), the flowing coolant can drive the turbine blades (407) to rotate. The turbine blades (407) and the rotating shaft (403) drive the exhaust fan blades (404) to rotate. The exhaust fan blades (404) drive the air flow and draw in external air through the top shell (401) and the air inlet (6). The heat dissipation fins (405) are installed inside the top shell (401). The bottom of the heat dissipation fins (405) extends into the sealed shell (1). They can absorb the heat generated by the battery (2) and increase the heat dissipation area through the heat dissipation fins (405). The heat dissipation fins (405) are carried away by the flowing air, which further improves the heat dissipation effect.

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