An aircraft battery

Abstract

The utility model relates to battery technical field, and disclose a kind of aircraft battery, including box, box is provided with plastic plate, plastic plate is provided with plastic flue, still be provided with multiple air outlets on the plastic plate, multiple air outlet and plastic flue are communicated, the top of plastic plate is also provided with smoke vent, box is also provided with structural plate, multiple fixing holes are provided on the structural plate, multiple fixing holes are all provided with electric core, the explosion vent of the bottom of electric core and the smoke vent are communicated. With whole package heat spread controllable, can extinguish fire and cool down and so on Advantage, solve the problem that need to rely on external structure and heat runaway influence entire system.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to an aircraft battery. Background Technology

[0002] Battery modules are an important component of electric aircraft. Currently, the direction of thermal runaway explosions in batteries is mostly uncontrollable or requires additional smoke duct structures. In particular, the ability to control thermal runaway is especially important in the field of electric aircraft.

[0003] Safety is paramount for eVTOL aircraft during flight. High-rate ternary lithium batteries are prone to probabilistic short-circuit runaway within the cells, requiring the battery pack design to control short-circuit runaway cells. Traditional cell thermal runaway protection relies on external additional structures, and in existing technologies, the explosion venting channel is mostly an integral structure, meaning that thermal runaway of any cell will affect the effectiveness of the entire explosion venting system.

[0004] Therefore, we propose an aircraft battery to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an aircraft battery with advantages such as controllable thermal spread of the entire pack and the ability to extinguish fires and cool down, thus solving the problems of relying on external structures and thermal runaway affecting the entire system.

[0006] (II) Technical Solution To achieve the aforementioned goal of controllable heat spread throughout the battery pack and effective fire suppression and cooling, this utility model provides the following technical solution: an aircraft battery, comprising a housing, a plastic plate disposed within the housing, a plastic flue disposed within the plastic plate, multiple air outlets disposed on the plastic plate and connected to the plastic flue, a smoke vent disposed on the top of the plastic plate, a structural plate disposed within the housing, multiple fixing holes disposed on the structural plate, each fixing hole containing a battery cell, an explosion vent at the bottom of the battery cell connected to the smoke vent, and multiple fire extinguishing devices disposed on the structural plate for extinguishing and cooling the plastic flue.

[0007] As a further optimization of this utility model: the fire extinguishing device includes an aerosol fire extinguishing agent, and the bottom of the aerosol fire extinguisher is provided with a spray port, which is connected to the smoke vent.

[0008] As a further optimization of this utility model: the aerosol fire extinguisher adopts a cylindrical structure and is fixed to the structural plate through the fixing holes.

[0009] As a further optimization of this utility model: the battery cell is equipped with an external temperature sensor, which is connected to the bottom of the aerosol fire extinguisher. The temperature of the battery cell is determined by the temperature sensor, which then triggers the aerosol fire extinguisher to work.

[0010] As a further optimization of this utility model: the plastic flue adopts a zigzag arrangement and is connected to the outside through the air outlet. The plastic flue is also equipped with compartments. The gas and flame of the battery cell enter the zigzag structure after passing through each compartment and are discharged through the air outlet. The zigzag structure can be designed with as many and as long channels as possible, so that the flame and smoke can be cooled to the maximum extent and ensure that the smoke state when the battery is discharged can minimize the impact on other equipment on the aircraft.

[0011] As a further optimization of this utility model: the plastic sheet includes a body and a base plate. The base plate is connected to the body by welding. The design uses two separate plastic parts for welding. After using this process, it can meet the various complex flue chambers and bending structures inside the plastic flue. After the body and the base plate are welded together, an internal cavity structure is formed to achieve the functions of fire prevention, smoke exhaust and cooling.

[0012] As a further optimization of this utility model: the box body is also provided with multiple air vents, and the multiple air vents extend out of the box body through the air vents to connect with the outside.

[0013] As a further optimization of this utility model: the box body also includes a box cover, and a closed space is formed between the box cover and the box body to protect the battery cell.

[0014] As a further optimization of this utility model: the structural plate is formed by foamed structural adhesive, which is not easy to catch fire.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides an aircraft battery with the following advantages: The aircraft battery features a unique internal design that resembles a cylindrical aerosol fire extinguisher, along with an external temperature sensor. When there is a flame inside the battery or the temperature exceeds 185°C, the cylindrical aerosol will spray fire extinguishing agent to achieve fire suppression and cooling effects. 2. In the event of a single cell runaway, the flames and gases in this aircraft battery are controlled by a designed smoke duct to prevent their spread and avoid affecting the remaining cells. This ensures that the thermal spread of the entire battery pack is controllable after a single cell's thermal runaway. The smoke duct is designed with a "reverse" path to provide sufficient buffer for the flames and smoke, reducing the damage to other equipment on board. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the exploded structure of the component of this utility model; Figure 2 This is a schematic diagram of the structure of the aerosol fire extinguisher of this utility model; Figure 3 This is a schematic diagram of the plastic flue structure of this utility model.

[0017] In the diagram: 1. Box body; 2. Base plate; 3. Main body; 4. Structural plate; 5. Aerosol fire extinguisher; 6. Box cover; 7. Battery cell; 8. Smoke vent; 9. Temperature sensor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3 An aircraft battery includes a housing 1, inside which is a plastic sheet with a plastic flue. Multiple air vents are also provided on the plastic sheet, communicating with the plastic flue. Multiple air holes are also provided on the housing 1, extending out of the housing 1 and connecting to the outside. A smoke vent 8 is provided on the top of the plastic sheet. A structural plate 4 is also provided inside the housing 1, formed of foamed structural adhesive to prevent ignition. Multiple fixing holes are provided on the structural plate 4, each containing a battery cell 7. An explosion vent at the bottom of the battery cell 7 communicates with the smoke vent 8. Multiple fire extinguishing devices are also provided on the structural plate 4 for extinguishing and cooling the plastic flue. The housing 1 also includes a cover 6, forming a closed space between the cover 6 and the housing 1 to protect the battery cells 7.

[0020] The fire extinguishing device includes an aerosol fire extinguisher 5, which has a spray nozzle at the bottom and is connected to a smoke vent 8. The aerosol fire extinguisher 5 has a cylindrical structure and is fixed to the structural plate 4 through fixing holes. The battery cell 7 has an external temperature sensor 9, which is connected to the bottom of the aerosol fire extinguisher 5. The temperature sensor 9 determines the temperature of the battery cell 7 and further triggers the aerosol fire extinguisher 5 to work.

[0021] The plastic flue adopts a zigzag layout, connecting to the outside through the exhaust port. The interior of the plastic flue also includes compartments. Gas and flame from battery cell 7 pass through each compartment before entering the zigzag structure and exiting through the exhaust port. The zigzag structure allows for the design of as many long channels as possible, maximizing the cooling of flames and smoke and ensuring that the smoke from the discharged battery minimizes its impact on other equipment on the aircraft. The plastic panel includes a body 3 and a base plate 2. The base plate 2 is welded to the body 3, using two separate plastic parts for welding. This process allows for the creation of various complex flue chambers and bending structures within the plastic flue. After welding the body 3 and base plate 2, an internal cavity structure is formed, achieving fireproofing, smoke extraction, and cooling functions.

[0022] Working principle: The cylindrical aerosol fire extinguisher 5 is arranged in the middle of the cylindrical lithium battery cell 7 according to the severity of the fire area and fixed through the fixing holes. The bottom of the device is equipped with a temperature sensor 9. When a battery cell 7 enters thermal runaway and emits flames and smoke, the flames and smoke are ejected through the explosion-proof port of the battery cell 7 itself. The flames and smoke are controlled and collected inside the plastic flue, preventing them from spreading into the battery box 1. This can better control the heat spread between the runaway battery cell 7 and the good battery cell 7, ensuring safety. After the cylindrical aerosol fire extinguisher 5 is detected by the temperature sensor 9, it opens and sprays the extinguishing agent into the designed plastic flue, which can quickly achieve the purpose of extinguishing the fire and cooling down.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aircraft battery, comprising a housing (1), characterized in that: The box (1) is equipped with a plastic board, and a plastic flue is provided inside the plastic board. The plastic board is also equipped with multiple air outlets, which are connected to the plastic flue. The top of the plastic board is also equipped with a smoke vent (8). The box (1) is also equipped with a structural plate (4), which is equipped with multiple fixing holes. Each fixing hole is equipped with a battery cell (7). The explosion vent at the bottom of the battery cell (7) is connected to the smoke vent (8). The structural plate (4) is also equipped with multiple fire extinguishing devices, which are used to extinguish and cool the plastic flue.

2. The aircraft battery according to claim 1, characterized in that: The fire extinguishing device includes an aerosol fire extinguisher (5), the bottom of which is provided with a spray port, which is connected to the smoke vent (8).

3. The aircraft battery according to claim 2, characterized in that: The aerosol fire extinguisher (5) has a cylindrical structure and is fixed to the structural plate (4) through the fixing hole.

4. The aircraft battery according to claim 2, characterized in that: The battery cell is equipped with an external temperature sensor (9), which is connected to the bottom of the aerosol fire extinguisher (5).

5. The aircraft battery according to claim 1, characterized in that: The plastic flue is arranged in a zigzag pattern and connects to the outside through the air outlet.

6. The aircraft battery according to claim 1, characterized in that: The plastic sheet includes a body (3) and a base plate (2), and the base plate (2) is connected to the body (3) by welding.

7. The aircraft battery according to claim 1, characterized in that: The box (1) is also provided with multiple air vents, and the multiple air vents extend out of the box (1) through the air vents to connect with the outside.

8. The aircraft battery according to claim 1, characterized in that: The enclosure (1) also includes a cover (6), and a closed space is formed between the cover (6) and the enclosure (1) to protect the battery cell (7).

9. The aircraft battery according to claim 1, characterized in that: The structural panel (4) is formed using foamed structural adhesive.

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