A reserve battery device

Abstract

This invention provides a reserve battery device capable of long-term storage, rapid activation in all 360° orientations, uniform electrolyte filling, and stable discharge after electrolyte filling. The reserve battery device includes: a reserve module, a distribution network module, and a cell module. The cell module includes multiple unfilled cell units connected in parallel and / or series. The reserve module stores electrolyte and, upon activation, pushes the electrolyte to the distribution network module using pressure. The distribution network module evenly distributes the electrolyte to each cell unit in the cell module.

Description

Technical Field

[0001] This invention relates to a battery device, specifically a reserve battery device, and belongs to the field of battery technology. Background Technology

[0002] As the environmental requirements for aerospace power applications become increasingly demanding, battery packs are required to have long storage life and the ability to be activated quickly and accurately in all 360° orientations. However, traditional backup battery packs using gas generator activation methods cannot precisely control the amount of electrolyte injected, and the activation orientation is limited to a certain range. After activation, electrolyte backflow in a tumbling orientation can affect the stability of the battery pack's discharge.

[0003] Therefore, it is necessary to design a backup battery pack device that can meet the requirements of aerospace power supplies for long storage period, activation under multiple attitudes and stable discharge after activation, while taking into account the compact structure and reliability of the battery pack. Summary of the Invention

[0004] In view of this, the present invention provides a storage battery device that can achieve long-term storage, rapid activation in all 360° orientations, uniform liquid injection, and stable discharge after liquid injection.

[0005] The technical solution of the present invention is: a reserve battery device, comprising: a reserve module, a distribution network module, and a cell module;

[0006] The cell module comprises multiple unfilled cell units connected in parallel and / or in series;

[0007] The storage module is used to store electrolyte and can push the electrolyte to the distribution network module by pressure after activation.

[0008] The evenly distributed pipeline module is used to evenly distribute the electrolyte to each individual cell in the cell module.

[0009] Based on the above solution, the storage module further includes: a gas generator, a liquid storage tank, a piston plate, a spring, an electrolyte, an internal guide pipe, and a one-way valve;

[0010] The storage tank has openings at both ends along its axis, one end being an activation port and the other end being a liquid outlet; both the activation port and the liquid outlet are sealed by isolation diaphragms.

[0011] Install a gas generator outside the activation port of the storage tank;

[0012] The storage tank is equipped with a piston plate that slides against its inner wall, and a sealing ring is provided on the outer circumference of the piston plate; the space between the piston plate and the end face where the liquid outlet is located is filled with electrolyte.

[0013] An internal guide tube is coaxially arranged at the location of the liquid outlet inside the storage tank; one end of the internal guide tube is fixedly connected to the inner surface of the end where the liquid outlet of the storage tank is located, and the other end extends coaxially into the inside of the storage tank for a set length.

[0014] A spring is coaxially mounted inside the liquid storage tank. One end of the spring abuts against the piston plate, and the other end abuts against the inner surface of the liquid outlet of the liquid storage tank.

[0015] The outlet of the storage tank is connected to the equal distribution pipeline module via a one-way valve.

[0016] Based on the above scheme, two coaxially fitted springs are further installed inside the liquid storage tank. One end of the outer spring A abuts against the piston plate, and the other end abuts against the inner surface of the liquid storage tank outlet. One end of the inner spring B abuts against the piston plate, and the other end is fitted outside the internal guide tube and abuts against the inner surface of the liquid storage tank outlet.

[0017] Based on the above scheme, further, the compression height of the spring is greater than the length of the internal guide tube; the amount of electrolyte pushed after the storage module is activated once is the amount of electrolyte contained in the space between the initial installation position of the spring and the compression position inside the storage tank.

[0018] Based on the above scheme, the evenly distributed pipeline module further includes: an external guide straight pipe A connected to the reserve module, an external guide straight pipe B connected to the external guide straight pipe A through multiple connecting pipes, and an injection pipe for connecting the external guide straight pipe B to the battery cell; the injection pipe corresponds one-to-one with the battery cell.

[0019] Based on the above solution, it further includes: a vacuum module, which is used to evacuate the distribution network module and the cell module;

[0020] The vacuum module includes a vacuum check valve and a sealing sleeve; the vacuum check valve is connected to the equal distribution pipeline module and the connection is sealed by the sealing sleeve.

[0021] Beneficial effects:

[0022] (1) The storage battery device of the present invention uses pressure to push the electrolyte, thereby enabling the storage battery pack to be activated in all 360° orientations; by setting a uniform distribution pipeline module, the electrolyte can be evenly distributed to multiple cells to be activated in the cell module, thereby enabling the cells to be quickly and evenly wetted by a precise amount of electrolyte and then activated and discharged stably.

[0023] (2) In the storage battery device of the present invention, the electrolyte contained in the space between the initial installation position of the spring and the pressure position is the amount of electrolyte injected after activation, thereby enabling precise control of the amount of electrolyte injected.

[0024] (3) In the storage battery device of the present invention, during the storage period, the electrolyte, the gas generator and the unfilled battery cell are stored separately through the isolation membrane, and the unfilled battery cell and the equal distribution pipeline module are kept at a certain vacuum level, thereby enabling long-term storage.

[0025] (4) In the storage battery device of the present invention, two coaxially fitted springs are provided inside the storage tank to ensure the stability of the axial movement of the piston plate when pushing the electrolyte and to achieve uniform compression of the electrolyte.

[0026] (5) In the storage battery device of the present invention, the passage between the storage module and the distribution network module is quickly disconnected after the electrolyte is injected, which can prevent electrolyte backflow. Attached Figure Description

[0027] Figure 1 This is a half-sectional plan view of the battery device of the present invention;

[0028] Figure 2 This is an isometric view of the battery pack device of the present invention.

[0029] Wherein: 1-Gas generator; 2-Liquid storage tank; 3-Isolation diaphragm A; 4-Isolation diaphragm B; 5-Sealing ring; 6-Piston plate; 7-1 Spring A; 7-2 Spring B; 8-Electrolyte; 9-Internal guide tube; 10-One-way valve; 11-External guide straight tube A; 12-External guide straight tube B; 13-Connecting pipe; 14-Injection pipe; 15-Vacuum check valve; 16-Sealing sleeve; 17-Battery cell. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0031] This embodiment provides a compact and reliable storage battery pack that can achieve long-term storage (separation and vacuuming), rapid activation in 360° all-position, uniform liquid injection, and stable discharge.

[0032] like Figure 1 and Figure 2 As shown, the backup battery device includes: a backup module, a distribution network module, a vacuum module, and a cell module.

[0033] The storage module stores electrolyte 8 and can push electrolyte 8 to the distribution network module after activation. The storage module includes: gas generator 1, storage tank 2, piston plate 6, spring, electrolyte 8, internal guide pipe 9, and one-way valve 10. In this example, the storage tank 2 is cylindrical, made of 316L, with an inner wall dimension and tolerance of D100H8 and a wall thickness of 3mm. The storage tank 2 is filled with electrolyte 8. The storage tank 2 has openings at both ends along the axis (i.e., the middle of the front and rear end caps of the storage tank 2 has openings), one end is the activation port, and the other end is the liquid outlet. The gas generator 1 is installed at the activation port of the storage tank 2. In this example, the gas generator 1 is a DC24V electronic ignition gas generator, and the high-pressure gas produced is mainly nitrogen, with a volume of 0.5L at a pressure of 1.2MPa.

[0034] An isolation diaphragm B4 is fixed to the activation port of the storage tank 2 by a fastening ring; an isolation diaphragm A3 is fixed to the outlet port by a fastening ring; the electrolyte 8, gas generator 1, and dry-state battery cell 17 are stored separately by the two isolation diaphragms. In this example, both isolation diaphragms A3 and B4 are made of 0.1mm thick 1060 aluminum sheets with 0.05mm deep cross-shaped grooves to ensure that the membrane breaks from the center and the breaking pressure requirement is small; the fastening ring is made of 316L, with external threads and internal hexagonal through grooves. After tightening the isolation diaphragms, they are fixed to the front and rear end caps of the storage tank 2 by laser spot welding.

[0035] A piston plate 6 is installed inside the storage tank 2. When the storage module is not activated, the piston plate 6 is located at the end of the storage tank 2 where the activation port is located. Electrolyte 8 is filled between the piston plate 6 and the outlet end inside the storage tank 2. A sealing ring 5 is provided on the outer circumference of the piston plate 6. After the piston plate 6 and the sealing ring 5 are assembled, a piston dynamic seal is formed between them and the inner wall of the storage tank 2. In this example, the outer diameter of the piston plate 6 is D100f7, the thickness is 5mm, and the material is 316L. The sealing ring 5 is a metal O-ring.

[0036] An internal guide pipe 9 is provided at the location of the liquid outlet inside the liquid storage tank 2; one end of the internal guide pipe 9 is welded to the inner surface of the rear end cover of the liquid storage tank 2, and the other end extends coaxially into the liquid storage tank 2 for a set length.

[0037] In addition, a spring is coaxially mounted inside the liquid storage tank 2. One end of the spring abuts against the piston plate 6, and the other end abuts against the inner surface of the rear end cover of the liquid storage tank 2 (i.e., the inner surface of the end where the liquid outlet of the liquid storage tank 2 is located). When the piston plate 6 moves inside the liquid storage tank 2, it compresses the spring.

[0038] To ensure the stability of the axial movement of the piston plate 6 and achieve uniform compression of the electrolyte 8, a coaxially fitted spring is installed inside the storage tank 2 in this example, that is, two cylindrical compression springs are connected in parallel; for example... Figure 1As shown, the system includes a spring A7-1 located on the outer ring and a spring B7-2 located on the inner ring. One end of the outer spring A7-1 contacts the piston plate 6, and the other end contacts the inner surface of the rear end cap of the storage tank 2. One end of the inner spring B7-2 contacts the piston plate 6, and the other end is fitted onto the outside of the internal guide tube 9 and contacts the inner surface of the rear end cap of the storage tank 2. Both springs have the same wire diameter of 1mm, and their initial installation height and compression height are the same. The pressure exerted on the piston plate 6 when both are compressed together is 0.1MPa. Both springs are made of stainless steel. The outer diameter of the outer spring A7-1 is 2mm smaller than the inner diameter of the storage tank 2, and the inner diameter of the inner spring B7-2 is 2mm larger than the outer diameter of the internal guide tube 9.

[0039] The compression height of the spring (including spring A7-1 and spring B7-2) is greater than the length of the internal guide tube 9. In this example, the length of the internal guide tube 9 is 1 / 2 of the compression height of the spring; that is, when the spring is compressed, the end of the internal guide tube 9 is located in the middle position of the spring.

[0040] Externally, the outlet of the storage tank 2 is connected to the distribution network module via a one-way valve 10. In this example, the one-way valve 10 is a tubular type, with both ends welded to the storage tank 2 and the external guide pipe A in the distribution network module, respectively. The opening pressure of the one-way valve 10 is 1 MPa. The one-way valve 10 is used to prevent the electrolyte in the battery cell 17 from flowing back.

[0041] After the gas generator 1 is ignited, the high-pressure gas generated is much greater than the sum of the spring force and the opening pressure of the one-way valve 10. Therefore, after the reserve module is activated, that is, after the gas generator 1 is ignited, the high-pressure gas generated by it quickly pushes the piston plate 6 to the maximum stroke (that is, pushes the spring to the compressed state), and pushes the electrolyte 8 to the distribution network module.

[0042] The backup module uses pressure to push the electrolyte 8, which enables the backup battery pack to be activated in all 360° positions. The electrolyte 8 contained in the space between the initial spring mounting position and the pressure position inside the storage tank 2 is the amount of electrolyte injected after activation, thus enabling precise control of the injection volume.

[0043] The distribution network module is used to evenly distribute the electrolyte 8 in the reserve module to multiple battery cells 17 in the cell module after the reserve module is activated. The distribution network module uses a secondary parallel connection to achieve uniform electrolyte distribution. Specifically, the distribution network module includes an external guide pipe group composed of multiple external guide pipes. The external guide pipe group absorbs part of the impact energy through the throttling effect of the pipeline by connecting in series and in secondary parallel, thus evenly distributing the electrolyte 8 to the battery cells 17 to be activated. Specifically, in this example, the external guide pipe group includes an external guide straight pipe A11 connected to a one-way valve 10, an external guide straight pipe B12 connected to the external guide straight pipe A11 through multiple connecting pipes 13, and an injection pipe 14 connecting the external guide straight pipe B12 to the battery cell 17. The liquid injection tube 14 corresponds one-to-one with the battery cell 17. One end of the liquid injection tube 14 is connected to the liquid injection nozzle of the battery cell 17, and the other end is connected to the external guide straight tube B12.

[0044] The battery module comprises several identical, unfilled battery cells 17; these individual cells 17 are connected in series, parallel, or other methods to meet the system's power requirements. In this example... Figure 2 As shown, six individual battery cells 17 are installed on each side of the external straight conduit A11. An external straight conduit B12 is installed parallel above the external straight conduit A11. Six injection pipes 14 connect the left and right sides of the external straight conduit B12 to the injection nozzles of the corresponding individual battery cells 17. Specifically, in this example, the individual battery cells 17 are square aluminum-cased zinc-silver cells of the same specification, with a single cell capacity of 40Ah. The system's power requirements are met through a 6-series, 2-parallel configuration. The positive and negative terminals of the individual battery cells 17 are connected in series by welding copper sheets.

[0045] The vacuum module is used to evacuate the distribution network module and the battery cell module, ensuring that the unfilled battery cell module and the distribution network module are at a set vacuum level before activation. The vacuum module includes: a vacuum check valve 15 and a sealing sleeve 16; the vacuum check valve 15 is connected to an external straight guide pipe A11, and an external vacuum pump achieves a certain vacuum level inside the distribution network module and the battery cell module; the sealing sleeve 16 completely seals the vacuum check valve 15 to the external straight guide pipe A11. In this example, the vacuum check valve 15 is an SMC AKH04-M5 check valve, connected to the external straight guide pipe A11, and the vacuum pump achieves a vacuum level of 0.05 MPa inside the distribution network module and the battery cell module.

[0046] The working principle of the backup battery device is as follows: During the storage period, the electrolyte 8, the gas generator 1 and the unfilled battery cell 17 are stored separately through the separator A3 and separator B4. The unfilled battery cell and the equal distribution pipeline module are in a certain vacuum degree before activation by the vacuum one-way valve 15. Subsequently, the vacuum degree is maintained by sealing the sleeve 16.

[0047] During activation, the gas generator ignites, instantly generating high-pressure gas that breaks through the upper isolation diaphragm B4, pushing the piston plate 6 to compress the spring and electrolyte 8. The electrolyte 8 then breaks through the isolation diaphragm A3 at the outlet, opening the one-way valve 10. Through the collection and distribution of the distribution network module, the electrolyte 8 is evenly distributed to each battery cell 17. By compressing the spring to its maximum deformation state (i.e., the compressed state), the maximum stroke of the piston plate 6 is controlled to achieve precise electrolyte injection. At this time, the one-way valve 10 automatically closes to prevent the electrolyte 8 in the battery cell 17 from flowing back, thereby enabling the battery cell 17 to be quickly and evenly wetted with a precise amount of electrolyte 8, activating it and allowing for stable discharge.

[0048] Furthermore, an internal guide pipe 9 is installed inside the storage tank 2. If a small amount of high-pressure gas enters the electrolyte 8, the internal guide pipe 9 ensures that during 360° all-position injection, the gas entering the electrolyte 8 will not enter the distribution network module through the outlet. This is because the density of gas is much lower than that of electrolyte 8, and the port of the internal guide pipe 9 is located on the central axis of the storage tank 2, preventing the gas from reaching the port of the internal guide pipe 9. The gas will always remain above the electrolyte 8.

[0049] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A reserve battery device, characterized in that, include: Storage module, distribution network module and cell module; The cell module includes multiple unfilled cell units (17) connected in parallel and / or in series. The storage module is used to store electrolyte (8) and can push the electrolyte (8) to the distribution network module by pressure after activation; The uniform distribution pipeline module is used to uniformly distribute the electrolyte (8) to each individual cell (17) in the cell module. The storage module includes: a gas generator (1), a liquid storage tank (2), a piston plate (6), a spring, an electrolyte (8), an internal guide pipe (9), and a one-way valve (10). The storage tank (2) has openings at both ends along the axis, one end of which is the activation port and the other end is the liquid outlet; the activation port and the liquid outlet are both sealed by isolation membranes; during the storage period, the electrolyte (8), the gas generator (1) and the unfilled battery cell (14) are stored separately by the two isolation membranes. A gas generator (1) is installed outside the activation port of the liquid storage tank (2) to generate high-pressure gas to drive the piston plate (6). The storage tank (2) is provided with a piston plate (6) that slides with its inner wall, and a sealing ring (5) is provided on the outer circumference of the piston plate (6); the space between the piston plate (6) and the end face where the liquid outlet is located in the storage tank (2) is filled with electrolyte (8). An internal guide tube (9) is coaxially arranged at the location of the liquid outlet inside the liquid storage tank (2); one end of the internal guide tube (9) is fixedly connected to the inner surface of the end where the liquid outlet of the liquid storage tank (2) is located, and the other end extends coaxially into the interior of the liquid storage tank (2) for a set length; The liquid storage tank (2) is coaxially fitted with a spring inside. One end of the spring abuts against the piston plate (6), and the other end abuts against the inner surface of the liquid outlet of the liquid storage tank (2). The outlet of the storage tank (2) is connected to the equal distribution pipeline module through a one-way valve (10); Two coaxially mounted springs are installed inside the liquid storage tank (2). One end of the outer spring A (7-1) abuts against the piston plate (6), and the other end abuts against the inner surface of the liquid outlet of the liquid storage tank (2). One end of the inner spring B (7-2) abuts against the piston plate (6), and the other end is mounted outside the internal guide tube (9) and abuts against the inner surface of the liquid outlet of the liquid storage tank (2).

2. The reserve battery device according to claim 1, wherein The compression height of the spring is greater than the length of the internal guide tube (9); the amount of electrolyte (8) pushed after the storage module is activated once is the amount of electrolyte (8) contained in the space between the initial installation position of the spring and the compression position inside the storage tank (2).

3. The reserve battery device according to claim 1 or 2, wherein The equal distribution pipeline module includes: an external guide straight pipe A (11) connected to the storage module, an external guide straight pipe B (12) connected to the external guide straight pipe A (11) through multiple connecting pipes (13), and an injection pipe (14) for connecting the external guide straight pipe B (12) and the battery cell (17); the injection pipe (14) corresponds one-to-one with the battery cell (17).

4. The reserve battery device according to claim 1 or 2, wherein Also includes: Vacuum module, the vacuum module is used to evacuate the distribution network module and the cell module; The vacuum module comprises a vacuumizing one-way valve (15) and a sealing sleeve (16); the vacuumizing one-way valve (15) is connected with the equal distribution pipe network module, and is sealed at the connection by the sealing sleeve (16).

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