Full-sea-depth pressure-bearing battery

Abstract

The full-sea-depth pressure-bearing battery comprises a battery module, a box body, a cover plate, a leather bag, an air valve assembly and an oil port plug, the battery module is arranged in the box body, the leather bag and the cover plate are sequentially arranged above the box body, one side of the box body is provided with an oil filling port, a first sealing ring is arranged on the oil port plug in a penetrating mode, the oil port plug is connected with the oil filling port, and the air valve assembly is arranged on the air valve assembly. The air valve assembly is connected with the leather bag, the air valve assembly is used for discharging air in the box body, the leather bag comprises a leather bag convex hull, when the battery works in seawater, the leather bag convex hull moves towards the direction of the battery module through the pressure of the seawater, so that the filling and sealing oil in the box body is compressed, and the pressure generated by the compressed filling and sealing oil is balanced with the external water pressure; therefore, the battery has a pressure self-compensation structure, the pressure bearing capacity of the battery is improved, and the reduction of the internal space of the battery caused by increase of the wall thickness and encapsulation of resin is avoided, so that the battery disclosed by the embodiment can have a larger space for mounting more single cells, and the power supply duration is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a full-ocean-depth pressure-bearing battery. Background Technology

[0002] With the development of deep-sea exploration technology, deep-sea equipment is increasingly demanding in terms of long endurance, high efficiency, high pressure resistance, and high integration. This requires the energy systems of deep-sea equipment to have greater capacity and higher reliability. Some deep-sea equipment is powered by the mother ship, but as the depth increases, the cost and difficulty of powering the mother ship also increase significantly. Therefore, for deep-sea equipment operating at great depths, most still use their own onboard batteries for power supply. Deep-sea equipment such as submersibles, deep-sea transport vehicles, and deep-sea rescue equipment usually need to operate in the pressure environment of the deep sea at depths of hundreds or even thousands of meters. As the diving depth of the equipment increases, the pressure on the lithium battery pack also increases accordingly. Increasing the wall thickness and using resin potting in the battery box can enable the battery to withstand greater seawater pressure, but this will reduce the volume of the battery box, preventing the installation of more individual battery cells, resulting in insufficient battery energy and a shorter battery power supply time. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a full-ocean-depth pressure-bearing battery.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A full-ocean-depth pressure-bearing battery includes: a battery module, a housing, a cover plate, a bladder, an air valve assembly, and an oil inlet plug. The battery module is disposed inside the housing. The bladder and the cover plate are sequentially disposed above the housing. An oil inlet is provided on one side of the housing. A first sealing ring is provided on the oil inlet plug, and the oil inlet plug is connected to the oil inlet. The air valve assembly is connected to the bladder and is used to discharge air from inside the housing. The bladder includes a bladder protrusion, which moves towards the battery module under the pressure of seawater.

[0006] In one embodiment, the battery module includes a battery assembly, a housing, a first side cover, a second side cover, a positive electrode assembly, and a negative electrode assembly. The first side cover and the second side cover are respectively disposed on both sides of the housing. The battery assembly is disposed inside the housing. One side of the positive electrode assembly is connected to one side of the battery assembly, and the other side of the positive electrode assembly is connected to the first side cover. One side of the negative electrode assembly is connected to the other side of the battery assembly, and the other side of the negative electrode assembly is connected to the second side cover.

[0007] In one embodiment, the battery module further includes a plurality of first buffer sheets and second buffer sheets, each of the first buffer sheets being disposed between the housing and the battery assembly, the battery assembly including a plurality of individual battery cells stacked together, and each of the second buffer sheets being disposed between adjacent individual battery cells.

[0008] In one embodiment, the positive electrode assembly includes a positive electrode connecting copper busbar, a first end plate, a positive electrode busbar, an insulating cover, and a first protective plate. The positive electrode connecting copper busbar is disposed on the first end plate. One side of the positive electrode connecting copper busbar is connected to the positive electrode tab of the battery assembly, and the other side of the positive electrode connecting copper busbar is connected to the positive electrode busbar. The first end plate and the positive electrode busbar are connected to the first side cover by screws. The insulating cover is disposed above the first end plate, and the first protective plate is disposed on the side of the positive electrode busbar away from the first end plate.

[0009] In one embodiment, the negative electrode assembly includes a negative electrode connecting copper busbar, a second end plate, a negative electrode busbar, and a second protective plate. The negative electrode connecting copper busbar is disposed on the second end plate. One side of the negative electrode connecting copper busbar is connected to the negative electrode tab of the battery assembly, and the other side of the negative electrode connecting copper busbar is connected to the negative electrode busbar. The second end plate and the negative electrode busbar are connected to the second side cover by screws. The second protective plate is disposed on the side of the negative electrode busbar away from the second end plate.

[0010] In one embodiment, a fuse assembly is further included. The fuse assembly is disposed on the side of the first protective plate away from the positive busbar. The fuse assembly includes a bracket, a mounting box, a fuse, and two terminals. The bracket is connected to the housing by screws. The mounting box is disposed on the bracket. The fuse is disposed inside the mounting box. The two terminals are respectively connected to the two sides of the fuse.

[0011] In one embodiment, the valve assembly includes a valve connector, a gasket, a nut, a second sealing ring, and a plug. The valve connector passes through the bladder, the gasket is fitted onto the valve connector via the nut, the plug is detachably connected to the valve connector, and the second sealing ring is fitted onto the plug.

[0012] In one embodiment, the housing further includes multiple watertight connectors. The housing is provided with a positive connection port, a negative connection port, and multiple charging ports. The multiple watertight connectors are respectively connected to the positive connection port, the negative connection port, and the multiple charging ports. The positive connection port, the negative connection port, and the multiple charging ports are located above the oil filling port.

[0013] In one embodiment, a bladder baffle is also included, which is disposed above the cover plate.

[0014] In one embodiment, a fuse box assembly is also included, which is disposed above the battery module.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] This utility model discloses a full-ocean-depth pressure-bearing battery. The battery module is placed inside a housing, and the bladder and cover are sequentially fixed to the top of the housing using screws, forming a sealed structure. An air valve assembly is inserted into the bladder, and an oil inlet is provided on one side of the housing. When filling the housing with potting oil, the air valve assembly is opened to expel air and ensure the housing is filled with potting oil, preventing a decrease in the battery's pressure-bearing capacity due to insufficient filling. Once the housing is filled with potting oil, the air valve assembly is closed, and the oil inlet is sealed with an oil plug, ensuring a sealed state. The oil plug is equipped with a first sealing ring to improve the battery's sealing ability. When the battery operates in seawater, the bulge moves towards the battery module under the pressure of the seawater, compressing the potting oil inside the casing. The pressure generated by the compressed potting oil balances with the external water pressure, giving the battery a pressure self-compensating structure. This improves the battery's pressure resistance and avoids the reduction of internal space caused by increasing wall thickness and potting resin. As a result, the battery in this embodiment can have more space to install more individual cells, increasing the power supply time. Furthermore, the volume of the bulge moving towards the battery module is greater than the volume of the compressed potting oil, which balances the pressure and prevents pulling at the connection between the bulge and the screw. The casing is made of titanium alloy, and the surface of the casing is coated with protective oil, which can improve the battery's service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0018] Figure 1 This is a schematic diagram of the structure of a full-ocean-depth pressure-bearing battery according to one embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the battery module structure in the diagram;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure of the skin sac in the middle;

[0021] Figure 4 for Figure 1A schematic diagram of the structure of the air valve assembly in the middle;

[0022] Figure 5 for Figure 1 A schematic diagram of the structure of the oil port plug in the middle;

[0023] Figure 6 for Figure 1 A schematic diagram of the structure of the fuse component.

[0024] Reference numerals: 100, Battery module; 200, Housing; 300, Cover plate; 400, Bulb; 500, Valve assembly; 600, Oil port plug; 210, Oil inlet; 610, First sealing ring; 410, Bulb protrusion; 110, Battery assembly; 120, Outer shell; 130, First side cover; 140, Second side cover; 150, Positive electrode assembly; 160, Negative electrode assembly; 170, First buffer plate; 151, Positive electrode connecting copper busbar; 152, First end plate; 153, Positive electrode busbar; 154, Insulation 155. Cover; 161. First protective plate; 162. Negative terminal connecting copper busbar; 163. Second end plate; 164. Negative terminal busbar; 165. Second protective plate; 700. Fuse assembly; 710. Bracket; 720. Mounting box; 730. Fuse; 740. Terminal block; 510. Gas valve connector; 520. Gasket; 530. Nut; 540. Second sealing ring; 550. Plug; 800. Watertight connector; 220. Positive terminal connection port; 230. Negative terminal connection port; 240. Charging port; 900. Leather baffle; Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0026] Please see Figures 1 to 6 A full-ocean-depth pressure-bearing battery 10 includes: a battery module 100, a housing 200, a cover plate 300, a bladder 400, an air valve assembly 500, and an oil port plug 600. The battery module 100 is disposed inside the housing 200. The bladder 400 and the cover plate 300 are sequentially disposed above the housing 200. An oil inlet 210 is provided on one side of the housing 200. A first sealing ring 610 is provided on the oil port plug 600. The oil port plug 600 is connected to the oil inlet 210. The air valve assembly 500 is connected to the bladder 400 and is used to discharge air from inside the housing 200. The bladder 400 includes a bladder protrusion 410, which moves toward the battery module 100 under the pressure of seawater.

[0027] It should be noted that by placing the battery module 100 inside the housing 200, and then fixing the bladder 400 and the cover plate 300 to the top of the housing 200 with screws, a sealed structure is formed for the battery. The air valve assembly 500 is inserted into the bladder 400, and an oil inlet 210 is provided on one side of the housing 200. When injecting potting oil into the housing 200, the air valve assembly 500 needs to be opened to expel air from the housing 200, ensuring the gaps inside the housing 200 are filled with potting oil. This prevents the housing 200 from being partially filled with potting oil, which could reduce the battery's pressure resistance. When the gaps inside the housing 200 are filled with potting oil, the air valve assembly 500 is closed, and the oil inlet 210 is sealed with an oil plug 600, ensuring the battery is in a sealed state. The oil plug 600 is fitted with a first sealing ring 610. To improve the battery's sealing capability, when the battery operates in seawater, the bulge 410 moves towards the battery module 100 under the pressure of the seawater, compressing the potting oil inside the housing 200. The pressure generated by the compressed potting oil balances with the external water pressure, thus giving the battery a pressure self-compensating structure. This improves the battery's pressure resistance and avoids reducing the battery's internal space by increasing the wall thickness and potting resin. As a result, the battery in this embodiment can have more space to install more individual battery cells, increasing the power supply time. Furthermore, the volume of the bulge 410 moving towards the battery module 100 is greater than the volume of the compressed potting oil, which balances the pressure while preventing pulling on the connection between the bulge 400 and the screw. The housing 200 is a titanium alloy housing 200, and the surface of the housing 200 is coated with protective oil, which can improve the battery's service life.

[0028] Please see Figure 1 In one embodiment, the battery module 100 includes a battery assembly 110, a housing 120, a first side cover 130, a second side cover 140, a positive electrode assembly 150, and a negative electrode assembly 160. The first side cover 130 and the second side cover 140 are respectively disposed on both sides of the housing 120. The battery assembly 110 is disposed inside the housing 120, such that the first side cover 130 and the second side cover 140 cooperate with the housing 120 to seal the battery assembly 110. One side of the positive electrode assembly 150 is flush with the battery assembly 110. One side of the positive electrode assembly 150 is connected to the other side of the first side cover 130, and one side of the negative electrode assembly 160 is connected to the other side of the battery assembly 110. The other side of the negative electrode assembly 160 is connected to the second side cover 140, so that the battery assembly 110 is electrically connected to other battery components through the positive electrode assembly 150 and the negative electrode assembly 160. At the same time, the positive electrode assembly 150 and the negative electrode assembly 160 are fixed to the first side cover 130 and the second side cover 140 respectively, which improves the stability of the battery module 100.

[0029] Please refer to it again. Figure 1In one embodiment, the battery module 100 further includes a plurality of first buffer sheets 170 and second buffer sheets. Each first buffer sheet 170 is disposed between the housing 120 and the battery assembly 110, which improves the impact resistance of the battery assembly 110 and prevents the battery assembly 110 from being damaged by external collisions. The battery assembly 110 includes a plurality of individual cells 110, which are stacked to make full use of the space of the housing 200 and place more individual cells 110, thereby increasing the specific energy of the battery pack in this embodiment to 135Wh / Kg. Since the individual cells 110 will collide during charging and discharging, each second buffer sheet is disposed between each adjacent individual cell 110, so that the second buffer sheet plays a buffering role between each adjacent individual cell 110, avoiding damage caused by mutual squeezing of adjacent individual cells 110.

[0030] Please refer to it again. Figure 1 In one embodiment, the positive electrode assembly 150 includes a positive electrode connecting copper busbar 151, a first end plate 152, a positive electrode busbar 153, an insulating cover 154, and a first protective plate 155. The positive electrode connecting copper busbar 151 is disposed on the first end plate 152, so that the first end plate 152 fixes the positive electrode connecting copper busbar 151, thereby making the structure of each positive electrode connecting copper busbar 151 more compact. One side of the positive electrode connecting copper busbar 151 is connected to the positive electrode tab of the battery assembly 110, and the other side of the positive electrode connecting copper busbar 151 is connected to the positive electrode busbar 153, thereby ensuring stable current transmission and effective power distribution. The first end plate 152 and the positive electrode busbar 153 are connected by screws. The first side cover 130 is connected, which fixes the first end plate 152 and the positive busbar 153 on the first side cover 130. When the battery is in seawater, the first end plate 152 and the positive busbar are not easily loosened or deformed due to the pressure of the seawater. The positive electrode is the electrode with a high potential in the battery, which is prone to electrochemical corrosion or short circuit, resulting in a decrease in battery performance or even damage. The insulating cover 154 is set above the first end plate 152 to further protect the positive electrode assembly 150. The first protective plate 155 is set on the side of the positive busbar 153 away from the first end plate 152 to prevent the positive busbar 153 from being exposed, thereby protecting the positive busbar 153.

[0031] Please refer to it again. Figure 1In one embodiment, the negative electrode assembly 160 includes a negative electrode connecting copper busbar 161, a second end plate 162, a negative electrode busbar 163, and a second protective plate 164. The negative electrode connecting copper busbar 161 is disposed on the second end plate 162, so that the second end plate 162 fixes the negative electrode connecting copper busbar 161, thereby making the structure of each negative electrode connecting copper busbar 161 more compact. One side of the negative electrode connecting copper busbar 161 is connected to the negative electrode tab of the battery assembly 110, and the other side of the negative electrode connecting copper busbar 161 is connected to the negative electrode busbar 163, thereby ensuring the stability of the current. For efficient transmission and power distribution, the second end plate 162 and the negative busbar 163 are connected to the second side cover 140 by screws, so that the second end plate 162 and the negative busbar 163 are fixed on the second side cover 140. When the battery is in seawater, the second end plate 162 and the negative busbar 163 are not easily loosened or deformed due to the pressure of the seawater. The second protective plate 164 is set on the side of the negative busbar 163 away from the second end plate 162, which can prevent the negative busbar 163 from being exposed, thereby protecting the negative busbar 163.

[0032] Please see Figure 6 In one embodiment, the system further includes a fuse assembly 700, which is disposed on the side of the first protective plate 155 away from the positive busbar 153. The fuse assembly 700 includes a bracket 710, a mounting box 720, a fuse 730, and two terminals 740. The bracket 710 is connected to the housing 200 by screws, so that the fuse assembly 700 is fixed on the housing 200 to prevent the fuse assembly 700 from loosening. The mounting box 720 is disposed on the bracket 710, and the fuse 730 is disposed inside the mounting box 720, so that the fuse 730 is protected by the mounting box 720. The two terminals 740 are respectively connected to the two sides of the fuse 730, and the positive and negative terminals of the battery module 100 are respectively connected to the two terminals 740. When the battery module 100 experiences a short circuit, overload, or abnormal charging, the current of the battery module 100 increases sharply. At this time, the fuse 730 can quickly cut off the current to prevent the battery module 100 from being damaged by excessive current, thereby improving the safety performance of the battery.

[0033] Please see Figure 4In one embodiment, the valve assembly 500 includes a valve connector 510, a gasket 520, a nut 530, a second sealing ring 540, and a plug 550. The valve connector 510 passes through the bladder 400, and the gasket 520 is fitted onto the valve connector 510 by the nut 530. This allows the gasket 520 and the valve connector 510 to clamp the bladder 400, thereby fixing the valve assembly 500 onto the bladder 400. The plug 550 is detachably connected to the valve connector 510, and the valve connector 510 is hollow. When it is necessary to inject potting oil into the housing 200, the valve assembly 500 is opened by turning the plug 550, and the gas inside the housing 200 flows out to the outside through the valve connector 510, improving the injection efficiency of the potting oil. The second sealing ring 540 is fitted onto the plug 550, improving the sealing capability of the valve assembly 500.

[0034] Please refer to it again. Figure 1 In one embodiment, the battery also includes multiple watertight connectors 800. The housing 200 is provided with a positive connection port 220, a negative connection port 230, and multiple charging ports 240. The multiple watertight connectors 800 are respectively connected to the positive connection port 220, the negative connection port 230, and the multiple charging ports 240. Since the watertight connectors 800 can withstand the huge pressure and impact of the extreme underwater environment, the positive connection port 220, the negative connection port 230, and the multiple charging ports 240 can be stably connected to various underwater devices in the underwater environment through the watertight connectors 800. The positive connection port 220, the negative connection port 230, and the multiple charging ports 240 are located above the oil filling port 210, which facilitates the orderly arrangement of the battery wiring and makes the battery structure more compact.

[0035] Please refer to it again. Figure 1 In one embodiment, a bladder baffle 900 is also included. The bladder baffle 900 is disposed above the cover plate 300 to prevent foreign objects from scratching the bladder 400 and to improve the battery's impact resistance.

[0036] In one embodiment, a fuse box assembly is also included. The fuse box assembly is disposed above the battery module 100 and provides overload protection and short circuit protection for the battery module 100, thereby further improving the safety performance of the battery.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A full-ocean-depth pressure battery, characterized by, The battery module, the box body, the cover plate, the bladder, the air valve assembly and the oil port plug, the battery module is arranged in the inside of the box body, the bladder and the cover plate are sequentially arranged above the box body, one side of the box body is provided with an oil injection port, a first sealing ring is provided on the oil port plug, the oil port plug is connected with the oil injection port, the air valve assembly is connected with the bladder, the air valve assembly is used for discharging air in the inside of the box body, the bladder comprises a bladder convex, and the bladder convex moves towards the direction of the battery module through the pressure of seawater. The battery module comprises a battery assembly, a shell, a first side cover, a second side cover, a positive electrode assembly and a negative electrode assembly, the first side cover and the second side cover are arranged on the two sides of the shell respectively, the battery assembly is arranged in the shell, one side of the positive electrode assembly is connected with one side of the battery assembly, the other side of the positive electrode assembly is connected with the first side cover, one side of the negative electrode assembly is connected with the other side of the battery assembly, and the other side of the negative electrode assembly is connected with the second side cover.

2. A full-ocean-depth pressure vessel battery as in claim 1, wherein, The battery module further comprises a plurality of first buffer sheets and second buffer sheets, each first buffer sheet is arranged between the shell and the battery assembly, the battery assembly comprises a plurality of single battery cells, and the single battery cells are arranged in stacks, and each second buffer sheet is arranged between each adjacent single battery cell.

3. A full-ocean-depth pressure vessel battery as in claim 2 wherein, The positive electrode assembly comprises a positive electrode connecting copper bar, a first end plate, a positive electrode bus copper bar, an insulating cover and a first protective plate, the positive electrode connecting copper bar is arranged on the first end plate, one side of the positive electrode connecting copper bar is connected with the positive electrode tab of the battery assembly, the other side of the positive electrode connecting copper bar is connected with the positive electrode bus copper bar, the first end plate and the positive electrode bus copper bar are connected with the first side cover through screws, the insulating cover is arranged above the first end plate, and the first protective plate is arranged on the side, away from the first end plate, of the positive electrode bus copper bar.

4. A full-ocean-depth pressure vessel battery as in claim 2 wherein, The negative electrode assembly comprises a negative electrode connecting copper bar, a second end plate, a negative electrode bus copper bar and a second protective plate, the negative electrode connecting copper bar is arranged on the second end plate, one side of the negative electrode connecting copper bar is connected with the negative electrode tab of the battery assembly, the other side of the negative electrode connecting copper bar is connected with the negative electrode bus copper bar, the second end plate and the negative electrode bus copper bar are connected with the second side cover through screws, and the second protective plate is arranged on the side, away from the second end plate, of the negative electrode bus copper bar.

5. A full-ocean-depth pressure vessel battery as in claim 2 wherein, The fuse assembly is arranged on the side, away from the positive electrode bus copper bar, of the first protective plate, and the fuse assembly comprises a bracket, a mounting box, a fuse and two wire terminals, the bracket is connected with the box body through screws, the mounting box is arranged on the bracket, the fuse is arranged in the mounting box, and the two wire terminals are connected with the two sides of the fuse respectively.

6. A full-ocean-depth pressure vessel battery as in claim 4 wherein, ​ 7. A full-ocean-depth pressure vessel battery as in claim 1 wherein, The gas valve assembly comprises a gas valve joint, a gasket, a nut, a second sealing ring and a plug, the gas valve joint is arranged on the skin bag, the gasket is sleeved on the gas valve joint through the nut, the plug is detachably connected with the gas valve joint, and the second sealing ring is sleeved on the plug.

8. A full-ocean-depth pressure vessel battery as in claim 1 wherein, The box is provided with a positive electrode connecting port, a negative electrode connecting port and a plurality of charging ports, and a plurality of water-tight connectors are connected with the positive electrode connecting port, the negative electrode connecting port and the plurality of charging ports respectively, and the positive electrode connecting port, the negative electrode connecting port and the plurality of charging ports are arranged above the oil injection port.

9. A full-ocean-depth pressure vessel battery as in claim 1 wherein, The box further comprises a skin bag baffle, which is arranged above the cover plate.

10. A full-ocean-depth pressure vessel battery as in claim 1 wherein, The box further comprises a safety box assembly, which is arranged above the battery module.

Images