Marine lithium ion battery pack

Abstract

The utility model relates to a marine lithium ion battery pack, which is used for placing a battery module and comprises a box cover, a front output plate and a liquid cooling plate, the box cover is of a semi-enclosed shell structure, the front end face and the lower end face of the box cover are both open, and the edges of the periphery of the opening of the front end face of the box cover are both provided with inward first flanges. The front output plate is installed on the inner side of the front end face of the box cover, the front end face of the front output plate is connected with the rear end face of the first flange, a port used for external output and communication is formed in the front output plate, and the liquid cooling plate is located at the opening of the lower end face of the box cover. The utility model solves the technical problems that the existing battery pack structure is insufficient in the aspects of structural strength, integration level, insulating property and thermal management efficiency.

Description

Technical Field

[0001] This utility model relates to a marine lithium-ion battery pack. Background Technology

[0002] With the continuous advancement of ship electrification, lithium-ion batteries, as a green and efficient energy storage method, have been widely used in various electric ship systems. As a comprehensive carrier integrating battery modules, thermal management, electrical connections, and safety protection, the structural design and thermal, electrical, and mechanical properties of lithium-ion battery packs directly affect the stability and safety of the entire ship's power system.

[0003] In existing technologies, battery packs typically employ a box-like structure to house the battery modules and incorporate a liquid cooling system for thermal management, preventing overheating or performance degradation. The liquid cooling plate is usually made of aluminum to balance thermal conductivity and lightweight requirements, but its impact resistance is relatively weak. To withstand the mechanical impacts of the complex operating environment of ships, additional steel protective plates are usually required to provide bottom structural protection. However, this structural form often requires additional installation steps, increasing assembly complexity and structural weight.

[0004] To improve insulation performance and safety, the surface of liquid cooling plates is generally covered with an insulating film, and thermally conductive gel is filled between the module and the cooling plate to enhance heat conduction efficiency. However, the uniformity of the distribution and adhesion of the thermally conductive gel directly affects its heat dissipation effect, and it is prone to falling off under long-term operation or vibration, posing a potential reliability risk.

[0005] Furthermore, existing battery pack structures often employ an independent output interface layout, which is not conducive to interface integration and maintenance. In practical marine applications, higher requirements are placed on sealing performance, electromagnetic compatibility, and corrosion resistance. Existing structures still have room for improvement in areas such as centralized front-end interface arrangement, system integration, and structural sealing.

[0006] Therefore, there is an urgent need to propose a marine lithium-ion battery pack structure with high structural strength, high integration, excellent insulation performance, and reliable thermal management efficiency to meet the comprehensive requirements of marine power systems for high safety, high reliability, and convenient maintenance. Utility Model Content:

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a marine lithium-ion battery pack.

[0008] A marine lithium-ion battery pack for housing battery modules includes a cover, a front output plate, and a liquid cooling plate. The cover is a semi-enclosed shell structure with open front and lower surfaces. The edges of the open front surface of the cover are provided with inward-facing first flanges. The front output plate is installed inside the front surface of the cover, and the front surface of the front output plate is connected to the rear surface of the first flange. The front output plate is provided with ports for external output and communication. The liquid cooling plate is located at the open lower surface of the cover.

[0009] Furthermore, the lower end face of the box cover has outward-facing second flanges around its opening, and the upper end face of the liquid cooling plate is connected to the lower end face of the second flanges.

[0010] Furthermore, the lower end face of the liquid cooling plate is connected to the protective plate, which covers the entire lower end face of the liquid cooling plate.

[0011] Furthermore, the protective plate is made of steel.

[0012] Furthermore, the battery module is positioned above the liquid cooling plate, and thermally conductive gel is filled between the liquid cooling plate and the battery module.

[0013] Furthermore, an insulating film is provided on the upper surface of the liquid cooling plate.

[0014] Furthermore, the battery module is equipped with voltage and temperature sensors, which are connected to the front output board via wires.

[0015] Furthermore, the lid is made of metal, and Mylar film is attached to the lid portion within the range of the conductor's movement.

[0016] Furthermore, the battery modules are connected by copper busbars, and the outside of the copper busbars is covered with insulating heat-shrink tubing.

[0017] Furthermore, silicone foam is provided between the front output plate and the first flange, and between the liquid cooling plate and the second flange.

[0018] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0019] The cover features a semi-enclosed shell structure, with open front and bottom for easy installation and maintenance of the battery modules and liquid cooling plate. The front output plate and liquid cooling plate are secured with a flanged structure, improving the stability and sealing of the component installation.

[0020] A liquid cooling plate is incorporated to effectively improve heat dissipation during battery operation and extend battery life. Thermally conductive gel is filled between the liquid cooling plate and the battery module to enhance heat conduction efficiency and ensure the battery module operates within a safe temperature range.

[0021] The liquid cooling plate is fitted with a protective plate at the bottom, made of steel, which has strong mechanical strength and impact resistance, making it suitable for complex marine environments. The protective plate can completely cover the liquid cooling plate, protecting the internal cooling system from external damage.

[0022] The battery module is equipped with voltage and temperature sensors to monitor battery operating status in real time, improving system safety. The sensors connect to the front output board for convenient centralized data transmission and management.

[0023] The battery modules are connected by copper busbars, which have excellent conductivity, and are also equipped with insulating heat-shrink tubing to enhance insulation protection.

[0024] An insulating film is installed on the liquid cooling plate to prevent direct contact with the battery module and thus short circuits. Mylar sheets are attached to the metal wiring area of ​​the cover to effectively prevent cable wear or short circuit risks.

[0025] Silicone foam is installed between the front output board and the flange, and between the liquid cooling plate and the flange, providing good cushioning, dustproofing and sealing functions, thus improving the overall reliability of the system. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the battery pack;

[0027] Figure 2 This is a schematic diagram of the box lid;

[0028] In the diagram, 1 is the cover, 2 is the front output plate, 3 is the liquid cooling plate, 4 is the first flange, and 5 is the second flange. Detailed Implementation

[0029] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0030] A marine lithium-ion battery pack for housing battery modules includes a cover 1, a front output plate 2, and a liquid cooling plate 3. The cover 1 is a semi-enclosed shell structure with open front and lower surfaces. The edges of the open front surface of the cover 1 are provided with inward-facing first flanges 4. The front output plate 2 is installed inside the front surface of the cover 1, and the front surface of the front output plate 2 is connected to the rear surface of the first flanges 4. The front output plate 2 is provided with ports for external output and communication. The liquid cooling plate 3 is located at the open lower surface of the cover 1.

[0031] In this embodiment, the cover 1, as the main load-bearing structure of the lithium-ion battery pack, is designed as a semi-enclosed structure, facilitating component installation and maintenance through its open front and bottom ends. The first flange 4 extends inward to form a boundary, aiding in the positioning and fixation of the front output board 2. The front output board 2 integrates multiple ports for power output and data communication. The liquid cooling plate 3 is installed at the opening at the bottom of the cover 1, undertaking the task of battery heat dissipation and maintaining the battery within its optimal operating temperature range.

[0032] In one possible implementation, the edges around the opening on the lower end face of the box cover 1 are provided with outward-facing second flanges 5, and the upper end face of the liquid cooling plate 3 is connected to the lower end face of the second flanges 5.

[0033] In this embodiment, the second flange 5 extends outward to provide an interface for mounting the liquid cooling plate 3. The upper surface of the liquid cooling plate 3 is in contact with the lower surface of the second flange 5 to form a reliable mounting structure, which is beneficial for the stable installation of the heat dissipation components and the improvement of heat conduction performance.

[0034] In one possible implementation, the lower end face of the liquid cooling plate 3 is connected to a protective plate, which covers the entire lower end face of the liquid cooling plate 3. This implementation provides an additional protective layer for the liquid cooling plate 3 by covering its lower end face with the protective plate, preventing mechanical impact or external environmental influences and maintaining the stability of the cooling system.

[0035] In one possible implementation, the protective plate is made of steel. This implementation, by using steel as the protective plate, effectively improves impact resistance and weather resistance, meeting the dual requirements of structural strength and corrosion resistance in marine environments.

[0036] In one possible implementation, the battery module is positioned above the liquid cooling plate 3, with thermally conductive gel filling the space between the liquid cooling plate 3 and the battery module. This structural design allows the heat generated by the battery module to be transferred to the liquid cooling plate 3 via the thermally conductive gel, thereby achieving efficient heat dissipation control. The thermally conductive gel filling the space between the two helps to improve contact thermal conductivity and reduce thermal resistance.

[0037] In one possible implementation, an insulating film is provided on the upper surface of the liquid cooling plate 3. This implementation, by adding an insulating film between the liquid cooling plate 3 and the battery module, blocks possible electrical paths, ensures electrical safety, and provides electrical isolation protection in the heat dissipation structure.

[0038] In one possible implementation, the battery module is equipped with voltage and temperature sensors, which are connected to the front output board 2 via wires. This structure enables real-time monitoring of the battery's operating status by incorporating voltage and temperature sensors on the battery module. The collected signals are transmitted to the battery management system or control unit via wires connected to the front output board 2.

[0039] In one possible implementation, the cover 1 is made of metal, and Mylar sheets are adhered to the portion of the cover 1 within the range of the conductor movement. Specifically, the voltage, temperature, and other data acquisition probes of the battery module are led to the front-end BMU via a wiring harness. Mylar sheets are adhered to all locations along the path of the wiring harness where it may come into contact with metal to prevent potential insulation risks. In this implementation, the cover 1 uses metal to provide structural strength, and Mylar sheets are adhered to the surface of the conductor movement area to prevent insulation wear, thereby improving the electrical safety and structural reliability of the system.

[0040] In one possible implementation, the battery modules are connected by copper busbars, the outside of which is covered with an insulating heat-shrink tubing.

[0041] In one possible implementation, silicone foam is provided between the front output plate 2 and the first flange 4, and between the liquid cooling plate 3 and the second flange 5, for sealing purposes.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A marine lithium-ion battery pack, characterized by, The device is used to house battery modules and includes a cover, a front output plate, and a liquid cooling plate. The cover is a semi-enclosed shell structure with open front and lower surfaces. The edges of the open front surface of the cover are provided with inward-facing first flanges. The front output plate is installed inside the front surface of the cover, and the front surface of the front output plate is connected to the rear surface of the first flange. The front output plate is provided with ports for external output and communication. The liquid cooling plate is located at the open lower surface of the cover.

2. The marine lithium-ion battery pack according to claim 1, characterized in that, The lower end face of the box cover has outward-facing second flanges around its opening, and the upper end face of the liquid cooling plate is connected to the lower end face of the second flanges.

3. The marine lithium-ion battery pack of claim 2, wherein, The lower end face of the liquid cooling plate is connected to the protective plate, which covers the entire lower end face of the liquid cooling plate.

4. The marine lithium-ion battery pack of claim 3, wherein, The protective plate is made of steel.

5. The marine lithium-ion battery pack of claim 2, wherein, The battery module is positioned above the liquid cooling plate, and thermally conductive gel is filled between the liquid cooling plate and the battery module.

6. The marine lithium-ion battery pack of claim 5, wherein, An insulating film is provided on the upper surface of the liquid cooling plate.

7. The marine lithium-ion battery pack of claim 1, wherein, The battery module is equipped with voltage and temperature sensors, which are connected to the front output board via wires.

8. The marine lithium-ion battery pack of claim 7, wherein, The box lid is made of metal, and Mylar film is attached to the lid portion within the range of the wire movement.

9. The marine lithium-ion battery pack of claim 1, wherein, The battery modules are connected by copper busbars, which are covered with insulating heat-shrink tubing.

10. The marine lithium-ion battery pack of claim 2, wherein, Silicone foam is provided between the front output board and the first flange, and between the liquid cooling plate and the second flange.

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