Box body structure for underwater voltage-withstanding charge-discharge battery and use method of box body structure

Abstract

The invention relates to a box body structure for an underwater voltage-withstanding charging and discharging battery and a use method thereof, the box body structure comprises a battery box body, a fixed plate is arranged in the battery box body, a plurality of parallel vertical pull rods are arranged at the bottom of the fixed plate, a positioning block is arranged at the bottom of each vertical pull rod, and stacked battery modules are arranged in the battery box body; a compensation film is mounted at an opening in the top surface of the battery box body through a fastener, a flange pressing plate is mounted on the top surface of the compensation film, a protective cover is mounted on the top surface of the flange pressing plate, and a switch valve communicated with a pressure relief hole in the middle of the compensation film is mounted in the middle of the protective cover; a protruding block is arranged on the outer side of the battery box body, a four-core watertight connector interface and an eight-core watertight connector interface are installed on the two sides of the protruding block respectively, and an oil filling valve is installed on the portion, below the protruding block, of the battery box body, so that the underwater long-time operation function of the underwater platform is achieved, and the working efficiency of the underwater platform is improved; and meanwhile, various application limitations of various underwater platforms caused by the problem of energy supply underwater are also reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater platform support equipment, in particular to a box structure for underwater pressure-resistant charging and discharging batteries and a use method thereof. Background Art

[0002] At present, with the increasing emphasis on deep-sea exploration and development, underwater platform technology has also made great progress. Battery technology, as the core energy source, directly restricts the endurance and operation capabilities of underwater platforms, and has become a research hotspot for the development of deep-sea technology.

[0003] With the continuous development of underwater platform technology, the functional requirements of underwater platforms are constantly increasing, which directly leads to an increase in the equipment in the pressure cabin of the underwater platform. Since the underwater equipment is limited by external water pressure and pressure-resistant material technology, the design space of its pressure cabin is limited. Therefore, in order to meet the various functional requirements of the underwater platform and ensure the layout space of non-pressure-resistant equipment, there is a need to arrange the battery system outboard of the underwater platform.

[0004] The underwater platform power system in the existing technology needs to surface and return to the mother ship for maintenance after a short period of deep-sea operation, and the battery system can only supply energy for a maximum of 24 hours. The underwater platform secondary power supply device and the rapid deployment power module require a single deep-sea operation that lasts for a long time or in units of years, requiring the battery system to have long-term maintenance-free performance in the deep sea and a low self-discharge rate.

[0005] For underwater platforms, the factors that affect their functions and long-term operation mainly include the following aspects:

[0006] 1. The power supply system cannot withstand underwater high pressure, so the power supply system needs to be arranged in the pressure cabin shell, which occupies the layout space of other functional equipment, resulting in the underwater platform being unable to achieve certain operating conditions;

[0007] Second, the power system cannot be charged under high pressure underwater, which means that the underwater platform needs to frequently surface back to the mother ship for energy replenishment, and cannot achieve the function of long-term operation. Therefore, it can be seen that the reasonable design of the underwater pressure-resistant battery box can ensure that the underwater energy system can achieve energy replenishment under pressure-resistant environment, which can effectively increase the operation time of the underwater platform, ensure the operation function of the underwater platform, improve its operation efficiency, and reduce the equipment loss caused by frequent surface replenishment. Summary of the invention

[0008] In view of the situation that the pressure cabin space of the underwater platform in the above-mentioned existing production technology is limited and frequent surfacing for energy replenishment cannot realize long-term underwater operation, the applicant provides a box structure for underwater pressure-resistant charging and discharging batteries and a method of using the same, in combination with the functional requirements of the equipment. The box for underwater pressure-resistant charging and discharging batteries has a modular design, a reasonable structure, wet pressure resistance and the ability to realize charging and discharging. As a part of the energy system of the underwater platform, it can withstand specific pressure, complete the charging and discharging energy replenishment function, realize the underwater platform's long-term underwater operation function, improve the working efficiency of the underwater platform, and also reduce various application restrictions of various underwater platforms caused by energy replenishment problems underwater.

[0009] The technical solution adopted by the present invention is as follows:

[0010] A box structure for underwater pressure-resistant charging and discharging batteries comprises a battery box, wherein a fixing plate is arranged inside the battery box, a plurality of parallel vertical pull rods are arranged at the bottom of the fixing plate, a positioning block is arranged at the bottom of each vertical pull rod, stacked battery modules are arranged inside the battery box, the bottom of the battery module is fixed by the positioning block, and the top of the battery module is fixed by the fixing plate; a compensation film is installed at the top opening of the battery box by fasteners, a flange pressure plate is installed on the top surface of the compensation film, a protective cover is installed on the top surface of the flange pressure plate, and a switch valve connected to the middle pressure relief hole of the compensation film is installed in the middle of the protective cover; a protrusion is arranged on the outside of the battery box, a four-core watertight connector interface and an eight-core watertight connector interface are installed on both sides of the protrusion respectively, and a refueling valve is installed on the battery box below the protrusion.

[0011] Its further technical solution is:

[0012] The top surface of the fixing plate is provided with a plurality of connecting pieces, and the connecting pieces are fixed to the inner wall surface of the battery box.

[0013] The connecting piece has a trapezoidal structure.

[0014] The fixing plates are connected into a frame form by a plurality of thin rods.

[0015] The battery box is an integrated structure, and the top surface of the battery box is provided with an opening.

[0016] External fixing blocks are respectively installed below the two sides of the exterior of the battery box.

[0017] A method for using a box structure for an underwater pressure-resistant charging and discharging battery, comprising the following steps:

[0018] Step 1: Battery installation;

[0019] First, place the battery module at the bottom of the battery box, with one corner of the bottom of the battery module in contact with the positioning block. The battery module routing direction is toward the four-core watertight connector interface, and the vertical direction is kept parallel to the battery box wall or vertical pull rod. Similarly, the box is filled with battery modules. The internal space of the battery box close to the four-core watertight connector interface should be reserved for the cable interface and the control system of the battery module. A fixing plate is installed on the upper side of the battery module to fix the battery module in the vertical direction.

[0020] Step 2: Fill with oil;

[0021] After installing the battery module inside the battery box, install the compensation film on the top surface of the battery box, then install the flange pressure plate on the top surface of the compensation film, and finally install the protective cover on the flange pressure plate and the compensation film; after the installation is completed, inject protective oil into the battery box through the refueling valve;

[0022] Step 3: Battery charging and discharging;

[0023] After the battery box is filled with oil, it is connected to a dedicated battery charger through a four-core watertight connector interface or an eight-core watertight connector interface. After setting the charging strategy on the dedicated charger, the battery module can be charged through the dedicated charger. After charging is completed, it is connected to the underwater platform power load through a four-core watertight connector interface or an eight-core watertight connector interface to meet the power requirements of the underwater platform operation.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention has a compact and reasonable structure and is easy to operate. Through the mutual cooperation of components such as the switch valve, compensation membrane, protective cover, flange pressure plate, watertight joint, battery box, refueling valve, fixing plate, vertical pull rod, positioning block, etc., an oil-filled pressure-resistant compensation structure is adopted, and long-term charging and discharging can be completed under specific underwater pressure, thereby avoiding frequent floating of the underwater platform to replenish energy. In addition, protective oil immersion protection is adopted, and multi-level battery thermal runaway heat suppression can be achieved in multiple dimensions of battery cells, battery modules, and battery packs. Electrode energy isolation, cell energy isolation, and module external energy isolation are achieved from bottom to top, thereby improving the charging and discharging safety of the battery in the box, effectively improving the energy replenishment efficiency of underwater equipment, and shortening the replenishment time.

[0026] At the same time, the present invention also has the following advantages:

[0027] 1. Use underwater pressure-resistant charging and discharging battery boxes to avoid the underwater platform from frequently floating up for energy replenishment, which greatly improves the energy replenishment efficiency of the underwater platform, greatly shortens the energy replenishment time of the underwater platform, effectively avoids the equipment loss that may be caused by the underwater platform frequently floating up for energy replenishment, and reduces the cost of use.

[0028] 2. Using a box for underwater pressure-resistant charging and discharging batteries, protective oil can be filled into the box, which can achieve multi-level battery thermal runaway heat suppression in multiple dimensions of battery cells, battery modules, and battery packs, and achieve electrode energy isolation, cell energy isolation, and module external energy isolation from bottom to top, greatly improving the safety of underwater platforms during energy replenishment and use.

[0029] 3. The box for underwater pressure-resistant charging and discharging batteries can adjust the internal pressure level and is suitable for underwater platform power systems at different depths.

[0030] 4. The box for underwater pressure-resistant charging and discharging batteries adopts an oil-filled pressure-resistant compensation structure, which can withstand a certain level of pressure. It can be used as an outboard device of the underwater platform, does not occupy the precious pressure-resistant space of the underwater platform, saves space for other functional equipment, and meets the multifunctional requirements of the underwater platform.

[0031] 5. The box structure of the underwater pressure-resistant charging and discharging battery is simple and has good maintainability. After the compensation film is removed, the management system and the battery module can be taken out for observation, which effectively improves the overall maintainability of the underwater platform.

[0032] 6. The box for underwater pressure-resistant charging and discharging batteries is made of 316L stainless steel, which has good seawater corrosion resistance and mechanical environment adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the present invention.

[0034] Figure 2 It is a structural schematic diagram of another viewing angle of the present invention.

[0035] Figure 3 It is an exploded view of the present invention.

[0036] Figure 4 It is a schematic diagram of the structure of the present invention (battery box is omitted).

[0037] Among them: 1. Switch valve; 2. Protective cover; 3. Flange pressure plate; 4. Compensation membrane; 5. Four-core watertight connector interface; 6. Eight-core watertight connector interface; 7. Battery box; 8. Refueling valve; 9. Fixing plate; 10. Vertical pull rod; 11. Positioning block; 12. External fixing block; 13. Battery module. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0039] like Figure 1-Figure 4As shown, the box structure for underwater pressure-resistant charging and discharging batteries in this embodiment includes a battery box 7, a fixing plate 9 is arranged inside the battery box 7, a plurality of parallel vertical pull rods 10 are arranged at the bottom of the fixing plate 9, a positioning block 11 is arranged at the bottom of each vertical pull rod 10, and stacked battery modules 13 are arranged inside the battery box 7, the bottom of the battery module 13 is fixed by the positioning block 11, and the top of the battery module 13 is fixed by the fixing plate 9; a compensation membrane 4 is installed at the opening of the top surface of the battery box 7 through fasteners, a flange pressure plate 3 is installed on the top surface of the compensation membrane 4, a protective cover 2 is installed on the top surface of the flange pressure plate 3, and a switch valve 1 connected to the middle pressure relief hole of the compensation membrane 4 is installed in the middle of the protective cover 2; a protrusion is arranged on the outside of the battery box 7, a four-core watertight connector interface 5 and an eight-core watertight connector interface 6 are installed on both sides of the protrusion, and a refueling valve 8 is installed on the battery box 7 below the protrusion.

[0040] A plurality of connectors are disposed on the top surface of the fixing plate 9 , and the connectors are fixed to the inner wall surface of the battery box 7 .

[0041] The connecting piece has a trapezoidal structure.

[0042] The fixing plate 9 is connected into a frame form by a plurality of thin rods.

[0043] The battery box 7 is an integrated structure, and the top surface of the battery box 7 is provided with an opening.

[0044] External fixing blocks 12 are respectively installed at the lower sides of the battery box 7 .

[0045] The specific structure and function of the box structure for underwater pressure-resistant charging and discharging batteries described in the present invention are as follows:

[0046] It is mainly composed of a switch valve 1, a compensation membrane 4, a protective cover 2, a flange pressure plate 3, a watertight joint, a battery box 7, a refueling valve 8 and other components. Its main function is to adopt an oil-filled pressure-resistant compensation structure, which can withstand the water pressure brought by the deep-sea environment and provide the battery with a normal pressure environment required for normal work. It also has a watertight connector interface, which can be connected to the load and the charging and discharging motor through the watertight connector to realize the normal charging and discharging function of the battery, avoid frequent floating of the underwater platform, ensure the energy supply of the underwater platform in the underwater pressure-resistant environment, and improve the energy supply efficiency.

[0047] Specific role of each component:

[0048] Among them, the switch valve 1 is connected to the pressure relief hole in the middle of the compensation membrane 4, which is used for gas discharge during the oil filling process and pressure relief after a failure occurs.

[0049] Among them, the protective cover 2 is located above the flange pressing plate 3 and is connected to the flange pressing plate 3 to prevent the compensation film 4 from being physically damaged by the outside.

[0050] Among them, the flange pressure plate 3 is located above the compensation membrane 4, contacts with the compensation membrane 4, and is fastened to the mounting interface on the upper side of the battery box 7 by physical means, so as to press the compensation membrane 4 and maintain the sealing.

[0051] Among them, the compensation membrane 4 directly serves as the upper cover of the battery box 7, is connected to the flange pressure plate 3 on the upper side, and is connected to the battery box 7 on the lower side. It utilizes the high compression modulus of the hydraulic oil to quickly generate an internal pressure equal to the external pressure with a small volume compression, so that the internal and external pressures instantly reach a dynamic balance.

[0052] Among them, the four-core watertight connector interface 5 is located on the convex block on the front side of the battery box 7, connected to the battery box 7, and is used to realize the power transmission (four-core) of the battery module 13.

[0053] Among them, the eight-core watertight connector interface 6 is located on the convex block on the front of the battery box 7, connected to the battery box 7, and is used to realize the power transmission (eight-core) of the battery module 13.

[0054] Among them, the battery box body 7 - the upper opening is in contact with the compensation film 4, and is fastened to the mounting interface of the flange pressure plate 3 by physical means. The interior is used to place rechargeable secondary batteries, and the main body is welded into shape.

[0055] Among them, the refueling valve 8 is located on the lower side of the outer box body. Protective oil is injected into the box body through the refueling valve 8 to achieve the oil filling pressure compensation effect, and the internal batteries are immersed in the protective oil to achieve the heat suppression effect of preventing multi-level battery thermal runaway.

[0056] The fixing plate 9 is located inside the battery box 7 at a certain distance from the bottom and is connected to the battery box 7 to fix the battery module 13 in the vertical direction.

[0057] The vertical pull rod 10 is connected to the fixing plate 9 and the positioning block 11 to fix the battery module 13 in the horizontal direction.

[0058] The positioning block 11 is located at the bottom of the battery box 7 and is connected to the battery box 7 to position and fix the battery module 13 inside the battery box 7 .

[0059] The main function of the present invention is to realize the safe charging and discharging of the battery under a certain pressure underwater, effectively improving the energy replenishment safety of the underwater platform, shortening the energy replenishment time, improving the energy replenishment efficiency of the underwater platform, and reducing the loss of various equipment caused by frequent surfacing for energy replenishment.

[0060] In actual work, the specific usage is as follows:

[0061] (I) Battery installation:

[0062] When installing the battery, first place the battery module 13 at the bottom of the battery box 7, with one corner of the bottom of the battery module 13 in contact with the positioning block 11, and the wiring direction of the battery module 13 is toward the four-core watertight connector interface 5, and the vertical direction is kept parallel to the box wall of the battery box 7 or the vertical pull rod 10, and so on until the inside of the box is fully installed with battery modules 13, wherein the internal space of the battery box 7 near the four-core watertight connector interface 5 should be reserved for the cable interface and the battery module 13 control system. Install the fixing plate 9 on the upper side of the battery module 13 to fix the battery module 13 in the vertical direction.

[0063] (ii) Oil filling:

[0064] After the battery module 13 is installed inside the battery box 7, the compensation film 4 is installed on the upper side of the battery box 7, and then the flange pressing plate 3 is installed, and finally the protective cover 2 is installed on the flange pressing plate 3 and the compensation film 4. After the installation is completed, protective oil is injected into the battery box 7 through the refueling valve 8.

[0065] (III) Battery charging and discharging:

[0066] After the oil filling process of the battery box 7 is completed, it is connected to the dedicated battery charger through the four-core watertight connector interface 5 or the eight-core watertight connector interface 6. After the charging strategy is set on the dedicated charger, the battery module 13 can be charged through the dedicated charger. After charging is completed, it is connected to the underwater platform power load through the four-core watertight connector interface 5 or the eight-core watertight connector interface 6 to meet the power demand of the underwater platform operation.

[0067] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A box structure for underwater pressure-resistant charging and discharging batteries, characterized in that: The invention comprises a battery box (7), wherein a fixing plate (9) is arranged inside the battery box (7), a plurality of parallel vertical pull rods (10) are arranged at the bottom of the fixing plate (9), a positioning block (11) is arranged at the bottom of each vertical pull rod (10), and stacked battery modules (13) are arranged inside the battery box (7), the bottom of the battery module (13) is fixed by the positioning block (11), and the top of the battery module (13) is fixed by the fixing plate (9); the top surface of the battery box (7) A compensation membrane (4) is installed at the opening through fasteners, a flange pressure plate (3) is installed on the top surface of the compensation membrane (4), a protective cover (2) is installed on the top surface of the flange pressure plate (3), and a switch valve (1) connected to the middle pressure relief hole of the compensation membrane (4) is installed in the middle of the protective cover (2); a convex block is arranged on the outer side of the battery box (7), and a four-core watertight connector interface (5) and an eight-core watertight connector interface (6) are respectively installed on both sides of the convex block, and a refueling valve (8) is installed on the battery box (7) below the convex block.

2. A box structure for underwater pressure-resistant charging and discharging batteries as claimed in claim 1, characterized in that: The top surface of the fixing plate (9) is provided with a plurality of connecting pieces, and the connecting pieces are fixed to the inner wall surface of the battery box (7).

3. A box structure for underwater pressure-resistant charging and discharging batteries as claimed in claim 2, characterized in that: The connecting piece has a trapezoidal structure.

4. A box structure for underwater pressure-resistant charging and discharging batteries as claimed in claim 2, characterized in that: The fixing plate (9) is connected into a frame form by a plurality of thin rods.

5. A box structure for underwater pressure-resistant charging and discharging batteries as claimed in claim 1, characterized in that: The battery box (7) is an integrated structure, and the top surface of the battery box (7) is provided with an opening.

6. A box structure for underwater pressure-resistant charging and discharging batteries as claimed in claim 1, characterized in that: External fixing blocks (12) are respectively installed below the two sides of the exterior of the battery box (7).

7. A method for using the box structure for underwater pressure-resistant charging and discharging batteries according to claim 1, characterized in that: The steps are as follows: Step 1: Battery installation; First, place the battery module (13) at the bottom of the battery box (7), with one corner of the bottom of the battery module (13) in contact with the positioning block (11), and the wiring direction of the battery module (13) is toward the four-core watertight connector interface (5), and the vertical direction is kept parallel to the box wall of the battery box (7) or the vertical pull rod (10), and the box is filled with battery modules (13) in this way, wherein the internal space of the battery box (7) near the four-core watertight connector interface (5) should be reserved for the cable interface and the control system of the battery module (13), and a fixing plate (9) is installed on the upper side of the battery module (13) to fix the battery module (13) in the vertical direction; Step 2: Fill with oil; After the battery module (13) is installed inside the battery box (7), the compensation film (4) is installed on the top surface of the battery box (7), and then the compensation film (4) is installed on the flange pressure plate (3), and finally the protective cover (2) is installed on the flange pressure plate (3) and the compensation film (4); after the installation is completed, protective oil is injected into the battery box (7) through the refueling valve (8); Step 3: Battery charging and discharging; After the oil filling process of the battery box (7) is completed, it is connected to a dedicated battery charger via a four-core watertight connector interface (5) or an eight-core watertight connector interface (6). After the charging strategy is set on the dedicated charger, the battery module (13) can be charged via the dedicated charger. After the charging is completed, it is connected to the underwater platform power load via the four-core watertight connector interface (5) or the eight-core watertight connector interface (6) to meet the power demand of the underwater platform operation.

Images