Pressure compensated pressure-resistant battery and compensation method for deep-sea oil-filled cable connection

Abstract

Deep sea oil-filled cable connected pressure compensation pressure battery and compensation method, including a plurality of parallel arranged pressure battery module, the structure of a single pressure battery module is: including battery unit, its outside is provided with battery module pressure shell, insulation oil cavity is formed between the outer wall of battery unit and the inner wall of battery module pressure shell, insulation oil is injected in the insulation oil cavity, the compensation oil bag is installed in one end of the battery module pressure shell and communicates with the insulation oil cavity, the other end of the battery module pressure shell is connected with the oil-filled cable flange connector through bolt, the adjacent two pressure battery modules are connected by cable, the outside of the cable is provided with rubber hose, the energy supply of deep sea submersible at any depth is realized and the pressure compensation self-balancing is realized, the specific energy of the battery pack is improved, the deep sea submersible can carry more energy under the same conditions, the endurance and operation ability of the deep sea submersible are improved, and the pressure bearing reliability is high, and the battery safety is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deep-sea pressure-resistant battery modules, in particular to a deep-sea oil-filled cable-connected pressure-compensated pressure-resistant battery pack and a compensation method, mainly used in underwater power supply and distribution equipment. BACKGROUND

[0002] At present, with the increasing emphasis on deep-sea exploration and development, deep-sea submersible technology has made great progress. As the core energy, battery technology directly restricts the endurance and operation ability of deep-sea submersible, and has become a research hotspot in the development of deep-sea technology.

[0003] The conventional underwater pressure-resistant battery pack is arranged inside the pressure-resistant structure container. With the increase of underwater depth, the weight of the pressure-resistant structure increases, which greatly reduces the mass specific energy density of the pressure-resistant battery pack. In the prior art, the internal battery modules of the oil-filled pressure-resistant self-balancing battery pack are connected through a water-tight connector and a water-tight cable. The battery modules need to balance the pressure change inside and outside the battery through a pressure compensation device, which needs to occupy a certain space. SUMMARY

[0004] The applicant provides a deep-sea oil-filled cable-connected pressure-compensated pressure-resistant battery pack and a compensation method to solve the above problems in the prior art, so as to provide energy for deep-sea submersibles of any depth and realize pressure compensation and self-balancing. The mass specific energy of the battery pack is greatly improved, so that the deep-sea submersible can carry more energy under the same conditions, improve its endurance and operation ability, and has high pressure-bearing reliability and high battery safety.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A deep-sea oil-filled cable-connected pressure-compensated pressure-resistant battery pack, comprising a plurality of pressure-resistant battery modules arranged side by side, wherein the structure of a single pressure-resistant battery module comprises: a battery unit, a battery module pressure-resistant shell arranged outside the battery unit, an insulating oil cavity formed between the outside of the battery unit and the inner wall of the battery module pressure-resistant shell, insulating oil injected into the insulating oil cavity, an oil injection port arranged above the battery module pressure-resistant shell, the insulating oil injected into the oil injection port, a compensation oil bag installed at one end of the battery module pressure-resistant shell and communicating with the insulating oil cavity, and a oil-filled cable flange connector installed at the other end of the battery module pressure-resistant shell through bolts, two adjacent pressure-resistant battery modules connected through a cable, the outside of the cable provided with a rubber hose, the head of the cable of the last pressure-resistant battery module connected with a water-tight connection socket, and the water-tight connection socket connected with a power-consuming device.

[0007] As a further improvement of the above technical scheme:

[0008] A battery module management unit and an internal pressure sensor are further arranged on the battery unit.

[0009] An external pressure sensor electrically connected to the battery module management unit is arranged outside the battery module pressure-resistant housing.

[0010] The oil-filled cable flange connector is connected to the battery module pressure-resistant housing through a rubber O-ring.

[0011] The oil-filled cable flange connector is connected to the rubber hose through a sealing ring and a clamp.

[0012] A plurality of parallel and spaced inner concave circular arc grooves are formed on the oil-filled cable flange connector, and a sealing ring is clamped in the inner concave circular arc grooves.

[0013] The opening size of the inner concave circular arc groove is less than or equal to the cross-sectional size of the sealing ring.

[0014] A compensation method for connecting a pressure-compensated pressure-resistant battery pack to an oil-filled cable for deep-sea use, comprising the following operation steps:

[0015] S1: preparation, assembling each pressure-resistant battery module;

[0016] S2: open the oil injection port of each pressure-resistant battery module and inject oil;

[0017] S3: after oil injection, the battery module pressure-resistant housing, the compensation oil bag and the rubber hose are filled with insulating oil and are in communication with each other;

[0018] S4: close each oil injection port;

[0019] S5: connect the watertight connector socket on the last pressure-resistant battery module to the power supply terminal; the external switch signal passes through the watertight connector socket to supply power to the battery module management unit of the battery pack to monitor the state of the battery;

[0020] S6: when the external pressure of the self-balancing battery pack increases, the compensation oil bag and the rubber hose are compressed to balance the internal and external pressures of the battery module pressure-resistant housing, and the internal and external pressure values of the battery module are monitored in real time by the internal and external pressure sensors; S7: when the internal and external pressure difference exceeds the rated pressure value, the external pressure increase needs to be stopped, and after the internal and external pressure values are consistent, the submersion or pressure test can be performed.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. The oil-filled pressure-resistant battery module is connected by oil-filled cable, and the oil-filled cable is used to replace the traditional water-tight cable, thereby greatly facilitating the connection between voltage modules, and the pressure balance inside and outside the pressure-resistant battery is realized by the characteristics of the oil-filled cable rubber hose and the compensation oil bag, the size of the compensation oil bag is greatly reduced, the mass energy density of the battery pack is greatly improved, and the endurance and operation capacity of the deep-sea submersible are greatly improved under the same arrangement space and load capacity.

[0023] 2. The battery cells inside the pressure-resistant battery module can be combined in series and parallel by single battery cells, and the battery pack of any voltage and energy can be flexibly formed.

[0024] 3. The pressure-resistant battery module is internally and externally provided with a pressure sensor, the external pressure and internal pressure of the pressure-resistant battery module can be monitored in real time through the sensor, the damage of the pressure-resistant shell of the battery module caused by excessive internal and external pressure difference is prevented, and the underwater depth is monitored.

[0025] 4. The battery module management unit is arranged inside the pressure-resistant battery module, the voltage, temperature and current of the battery cells inside the battery pack can be monitored in real time, the insulation and heat dissipation characteristics of the battery pack can be greatly improved by filling the insulating oil, and the safety and reliability of the battery pack are improved.

[0026] 5. The pressure compensation and compensation response caused by the pressure-resistant depth and diving speed of the battery can be adapted by changing the length and diameter of the rubber hose and the size and number of the compensation oil bag. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic view of the present application.

[0028] Figure 2 It is a partial view of the present application.

[0029] Figure 3 It is Figure 2 the partial enlarged view of A part.

[0030] 1, battery cell; 2, battery module pressure-resistant shell; 3, oil inlet; 4, insulating oil; 5, bolt; 6, rubber O-ring; 7, oil-filled cable flange connector; 8, clamp; 9, rubber hose; 10, cable; 11, battery module management unit; 12, internal pressure sensor; 13, inner concave circular arc groove; 14, sealing ring; 15, external pressure sensor; 16, compensation oil bag; 17, water-tight connection socket. DETAILED DESCRIPTION

[0031] The specific embodiment of the present application will be described below in combination with the drawings.

[0032] As Figures 1-3As shown, the deep-sea oil-filled cable connected pressure-compensated pressure-resistant battery pack of the embodiment comprises a plurality of pressure-resistant battery modules arranged side by side, and the structure of a single pressure-resistant battery module is as follows: comprising a battery cell 1, the battery cell 1 is externally provided with a battery module pressure-resistant shell 2, an insulating oil cavity is formed between the outer wall of the battery cell 1 and the inner wall of the battery module pressure-resistant shell 2, insulating oil 4 is injected into the insulating oil cavity, an oil injection port 3 is arranged above the battery module pressure-resistant shell 2, the insulating oil 4 is injected at the oil injection port 3, a compensation oil bag 16 is installed at one end of the battery module pressure-resistant shell 2 and is in communication with the insulating oil cavity, a flange connector 7 of the oil-filled cable is installed at the other end of the battery module pressure-resistant shell 2 through a bolt 5, two adjacent pressure-resistant battery modules are connected through a cable 10, the cable 10 is externally provided with a rubber hose 9, a watertight connection socket 17 is connected at the head of the cable 10 of the last pressure-resistant battery module, and the watertight connection socket 17 is connected with an electric device.

[0033] The battery cell 1 is further provided with a battery module management unit 11 and an internal pressure sensor 12.

[0034] The battery module pressure-resistant shell 2 is externally provided with an external pressure sensor 15 in electrical signal connection with the battery module management unit 11.

[0035] The flange connector 7 of the oil-filled cable is connected with the battery module pressure-resistant shell 2 through a rubber O-ring 6.

[0036] The flange connector 7 of the oil-filled cable is connected with the rubber hose 9 through a sealing ring 14 and a clamp 8.

[0037] A plurality of parallel and spaced inner concave circular arc grooves 13 are formed on the flange connector 7 of the oil-filled cable, and the sealing ring 14 is clamped in the inner concave circular arc grooves 13.

[0038] The opening size of the inner concave circular arc groove 13 is less than or equal to the cross-sectional size of the sealing ring 14.

[0039] The compensation method of the deep-sea oil-filled cable connected pressure-compensated pressure-resistant battery pack of the embodiment comprises the following operation steps:

[0040] S1: preparation, each pressure-resistant battery module is assembled;

[0041] S2: open the oil injection port 3 of each pressure-resistant battery module and inject oil;

[0042] S3: after oil injection, the battery module pressure-resistant shell 2, the compensation oil bag 16 and the rubber hose 9 are all filled with insulating oil 4 and are in communication with each other;

[0043] S4: close each oil injection port 3;

[0044] S5: Connect the watertight connector socket 17 on the last pressure-resistant battery module to the power supply terminal; the external switch signal powers the battery pack battery module management unit 11 through the watertight connector socket 17 to monitor the state of the battery;

[0045] S6: When the pressure self-balancing battery pack external pressure increases, the compensation oil bag 16 and the rubber hose 9 are compressed to balance the internal and external pressures of the battery module pressure-resistant shell 2, and the internal pressure sensor 12 and the external pressure sensor 15 monitor the internal and external pressure values of the battery module in real time; S7: When the internal and external pressure difference exceeds the rated pressure value, the external pressure increase needs to be stopped, and after the internal and external pressure values are consistent, the submersion or pressure is performed.

[0046] The connection relationship and action of each structural component of the application are:

[0047] Battery unit 1--oil-immersed pressure-resistant battery unit 1, composed of single battery cells in series and parallel connection.

[0048] Battery module pressure-resistant shell 2--pressure-resistant battery module shell, providing mechanical support and isolation from external medium.

[0049] Oil filling port 3--single oil filling port 3, which can be sealed by fasteners and O-rings after oil filling.

[0050] Insulating oil 4--fills the battery module pressure-resistant shell 2 and the rubber hose 9, and can balance the internal and external pressures of the battery module pressure-resistant shell 2 in deep-sea underwater pressure environment.

[0051] Bolt 5--used for fixing between the oil-filled cable flange connector 7 and the battery module pressure-resistant shell 2.

[0052] Rubber O-ring 6--used for sealing between the oil-filled cable flange connector 7 and the battery module pressure-resistant shell 2.

[0053] Oil-filled cable flange connector 7--connection mechanism of oil-filled cable and battery module pressure-resistant shell 2.

[0054] Hoop 8--fixing component for oil-filled cable rubber hose 9 and oil-filled cable flange connector 7.

[0055] Rubber hose 9--used for isolation of oil-filled cable from external medium and provides pressure compensation, with certain requirements for softness.

[0056] Cable 10--used for power transmission between battery modules.

[0057] Battery module management unit 11--used for monitoring the voltage, temperature and current of the battery cell in the battery module.

[0058] Internal pressure sensor 12 - used to monitor the internal pressure of the battery module and transmitted to the battery module management unit 11.

[0059] The inner concave circular groove 13 - used for oil-filled cable flange connector 7 and rubber hose 9 rubber seal and can increase the locking friction, the inner concave circular groove 13 with circular arc design, can effectively hold the sealing ring 14, prevent slipping, ensure the sealing effect.

[0060] Sealing ring 14 - used for oil-filled cable flange connector 7 and rubber hose 9 rubber seal and increase the locking friction.

[0061] External pressure sensor 15 - used for oil-filled pressure self-balancing battery pack external pressure monitoring and transmitted to the battery module management unit 11.

[0062] Compensation oil bag 16 - used for oil-filled pressure self-balancing battery pack pressure fast response compensation.

[0063] Water-tight connection socket 17 - used for pressure self-balancing battery pack and electrical equipment water-tight connection socket 17 connection.

[0064] The battery module pressure-resistant shell 2 is internally provided with battery units 1, and the battery modules are connected through oil-filled cables. The oil-filled cables are connected with the battery module pressure-resistant shell 2 through the oil-filled cable flange connectors 7 and are sealed through the rubber O-rings 6 and fixed through the bolts 5. The oil-filled cables are composed of the oil-filled cable flange connectors 7, the clamps 8, the rubber hoses 9, the cables 10 and the sealing rings 14. The oil-filled cables are in communication with the inside of the battery module pressure-resistant shell 2, and the insulating oil 4 is injected through the oil injection port 3. The pressure self-balancing battery pack is connected with the electrical equipment through the water-tight connection socket 17. When the pressure-resistant battery module is subjected to external pressure, the pressure is conducted to the battery units 1 through the oil-filled rubber hoses 9, the compensation oil bags 16 and the insulating oil 4, and at the same time, the external seawater is isolated from the internal battery units 1, and the internal and external pressures of the battery module pressure-resistant shell 2 are kept consistent. The soft characteristics of the rubber hoses 9 can make the seawater pressure changes be conducted to the inside of the battery module pressure-resistant shell 2 in real time, and the compensation amount of the internal pressure compensation of the battery pack is realized. The super-soft characteristics of the compensation oil bags 16 can meet the fast response of the internal and external pressure balance of the pressure self-balancing battery pack due to the fast change of the external pressure, and the size of the compensation oil bags 16 can be greatly reduced while meeting the pressure compensation amount and compensation speed. The diameter and length of the oil-filled cables are proportional to the pressure-resistant depth. At the same time, the battery module is subjected to external pressure, the pressure values are monitored in real time through the internal pressure sensor 12 and the external pressure sensor 15, and the battery module management unit 11 monitors the internal battery cell voltage, temperature and current of the battery module in real time.

[0065] In actual work process:

[0066] The pressure self-balancing battery pack according to the present application has the advantages of Figure 1After assembly, the insulating oil 4 is filled through the oil filling port 3, at this time, the battery module pressure-resistant shell 2, the compensation oil bag 16 and the oil filling cable rubber hose 9 are all filled with the insulating oil 4 and are in communication with each other. The battery pack and the power supply terminal are connected through the watertight connection socket 17. The external switch signal is connected through the watertight connection socket 17 to supply power to the battery pack battery module management unit 11 to monitor the state of the battery. When the pressure of the self-balancing battery pack is increased, the compensation oil bag 16 and the rubber hose 9 are compressed to balance the internal and external pressures of the battery module pressure-resistant shell 2, the internal pressure sensor 12 and the external pressure sensor 15 monitor the internal and external pressures of the battery module in real time, and when the internal and external pressure difference exceeds a certain pressure value, the increase of the external pressure needs to be stopped. After the internal and external pressure values are consistent, the submersion or pressure is carried out again.

[0067] The above description is an explanation of the application, not a limitation of the application, the scope of the application is defined in the claims, within the protection scope of the application, any form of modification can be made.

Claims

1. A pressure-compensated, pressure-resistant battery pack connected by an oil-filled cable for deep-sea applications, characterized in that: The system includes multiple voltage-resistant battery modules arranged side by side. The structure of a single voltage-resistant battery module is as follows: it includes a battery unit (1), a voltage-resistant housing (2) is provided on the outside of the battery unit (1), an insulating oil cavity is formed between the outside of the battery unit (1) and the inner wall of the voltage-resistant housing (2), insulating oil (4) is injected into the insulating oil cavity, an oil inlet (3) is provided on the top of the voltage-resistant housing (2), insulating oil (4) is injected at the oil inlet (3), and a connector connected to the insulating oil cavity is installed at one end of the voltage-resistant housing (2). The connected compensation oil bladder (16) is located at the other end of the battery module pressure-resistant housing (2) and is fitted with an oil-filled cable flange connector (7) by bolts (5). Adjacent two pressure-resistant battery modules are connected by cables (10). A rubber hose (9) is provided on the outside of the cable (10). A watertight connector (17) is connected to the head of the cable (10) of the last pressure-resistant battery module. The watertight connector (17) is connected to the electrical equipment. The battery unit (1) is also equipped with a battery module management unit (11) and an internal pressure sensor (12). The oil-filled cable flange connector (7) is connected to the rubber hose (9) via a sealing ring (14) and a clamp (8).

2. The deep-sea oil-filled cable connection pressure-compensated withstand voltage battery pack as described in claim 1, characterized in that: An external pressure sensor (15) is provided on the outside of the battery module pressure housing (2) and is electrically connected to the battery module management unit (11).

3. The deep-sea oil-filled cable connection pressure-compensated withstand voltage battery pack as described in claim 1, characterized in that: The oil-filled cable flange connector (7) is connected to the battery module pressure-resistant housing (2) via a rubber O-ring (6).

4. The deep-sea oil-filled cable connection pressure-compensated withstand voltage battery pack as described in claim 1, characterized in that: The oil-filled cable flange connector (7) has multiple parallel and spaced concave arc grooves (13), and a sealing ring (14) is inserted into the concave arc groove (13).

5. The deep-sea oil-filled cable connection pressure-compensated withstand voltage battery pack as described in claim 4, characterized in that: The opening size of the concave arc groove (13) is less than or equal to the cross-sectional size of the sealing ring (14).

6. A compensation method for a pressure-compensated, pressure-compensated battery pack connected using the deep-sea oil-filled cable as described in claim 1, characterized in that: The following steps are included: S1: Preparation work, assembling each voltage-resistant battery module; S2: Open the oil inlet (3) of each high-voltage battery module and add oil; S3: After oil filling, the battery module pressure-resistant housing (2), compensation oil bladder (16) and rubber hose (9) are all filled with insulating oil (4) and connected to each other; S4: Close each oil inlet (3); S5: Connect the watertight connector (17) on the last withstand voltage battery module to the power supply terminal; the external switch signal powers the battery module management unit (11) through the watertight connector (17) to monitor the battery status. S6: When the external pressure of the self-balancing battery pack increases, the compensation oil bladder (16) and the rubber hose (9) will be compressed to balance the internal and external pressure of the pressure-resistant housing (2) of the battery module. The internal pressure sensor (12) and the external pressure sensor (15) of the battery module monitor the internal and external pressure values ​​of the battery module in real time. S7: When the internal and external pressure difference exceeds the rated pressure value, the increase of external pressure must be stopped. Submersion or depressurization can only be carried out after the internal and external pressure values ​​are consistent.

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