Battery safety system and aircraft comprising same

Abstract

The present application relates to the technical field of batteries. Disclosed are a battery safety system and an aircraft. The battery safety system comprises a plurality of battery packs (1) and a battery compartment (2) fitted to the battery packs (1); the battery packs (1) are provided with exhaust ports (11) used for discharging gas in the battery packs (1); the battery compartment (2) is provided with exhaust holes (21) which are arranged in one-to-one correspondence with the exhaust ports (11) of the battery packs (1) and used for discharging gas out of the battery compartment (2); the ends of the battery packs (1) facing the exhaust holes (21) are provided with gas buffer areas; the exhaust ports (11) and the exhaust holes (21) are cooperatively connected, and areas enclosed by the exhaust ports (11) and the exhaust holes (21) are smaller than the gas buffer areas so as to increase the gas flow rate for discharging.

Description

Battery safety system and aircraft including the same Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery safety system and an aircraft comprising the same. Background Art

[0002] In most existing battery systems for EVTOLs, thermal runaway of the battery cells within the battery module can cause high-temperature gases and particulate matter to be emitted into the battery compartment, which can then enter the passenger cabin and compromise passenger safety. Therefore, a battery safety system is needed that can discharge these gases and particulate matter out of the battery compartment.

[0003] Summary of the Invention

[0004] One purpose of the present application is to provide a battery safety system that can discharge high-temperature gases and particulate matter after thermal runaway of the battery cell out of the battery compartment.

[0005] To achieve this goal, this application adopts the following technical solutions:

[0006] A battery safety system comprising:

[0007] A plurality of battery packs, each having an exhaust port for discharging gas inside the battery pack;

[0008] a battery compartment fitted with the battery pack, the battery compartment being provided with exhaust holes corresponding to the exhaust ports of the battery pack for exhausting gas from the battery compartment;

[0009] A gas buffer zone is provided at one end of the battery pack facing the exhaust hole;

[0010] The exhaust port and the exhaust hole are cooperatively connected, and an area enclosed by the exhaust port and the exhaust hole is smaller than an area of ​​the gas buffer zone so as to increase the gas flow rate for discharge.

[0011] Preferably, a pressure relief valve is provided in the battery pack, and the pressure relief valve is sealed in the gas buffer zone. The pressure relief valve is configured such that when thermal runaway occurs in the battery, the pressure relief valve opens and discharges the internal high-temperature gas into the gas buffer zone.

[0012] Preferably, the exhaust port sealing cover is provided on the pressure relief valve, and the exhaust port is protruded from the pressure relief valve for discharging gas through the battery compartment.

[0013] Preferably, the battery compartment has a hollow cavity accommodating area for accommodating and fixing the battery pack.

[0014] Preferably, the exhaust hole passes through the battery compartment.

[0015] Preferably, the exhaust holes are distributed on both sides of the battery compartment, and the number of the exhaust holes on both sides is eight.

[0016] Preferably, the cross section of the air outlet is an isosceles trapezoid, the cross section of the exhaust hole is circular, and the diameter of the minimum cross section of the air outlet is smaller than the diameter of the exhaust hole cross section, so that the two can be embedded in each other.

[0017] Preferably, the air outlet and the exhaust hole are interference fit.

[0018] Preferably, the hollow cavity is recessed along the thickness direction of the battery compartment.

[0019] To achieve this goal, this application also adopts the following technical solutions:

[0020] An aircraft, the aircraft cabin includes the battery safety system described in the above solution.

[0021] Beneficial effects of this application:

[0022] The battery safety system provided in this application has exhaust holes designed on the battery compartment, which correspond one-to-one to the exhaust ports designed on the battery pack. When thermal runaway occurs in the battery pack, the high-temperature gas and particulate matter discharged from the battery pack exhaust ports are directly discharged from the exhaust holes in the battery compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of the battery pack and battery compartment of the present application;

[0024] FIG2 is a schematic diagram of the exhaust port and exhaust hole of the present application;

[0025] FIG3 is a partial enlarged view of the exhaust port and exhaust hole of the present application. DETAILED DESCRIPTION

[0026] The following embodiments further illustrate the technical solutions of the present application. It is understood that the specific embodiments described herein are merely for the purpose of explaining the present application. It should also be noted that, for ease of description, only portions relevant to the present application are shown in the accompanying drawings, not all of them.

[0027] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application in specific contexts.

[0028] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] The present application provides a battery safety system, including several battery packs 1 and battery compartments 2 that are fitted with the battery packs 1. The battery packs 1 have exhaust ports 11 for discharging gas inside the battery packs; the battery compartments 2 are provided with exhaust holes 21 that are arranged in a one-to-one correspondence with the battery pack exhaust ports 11 for discharging gas from the battery compartments 2; a gas buffer zone is provided at one end of the battery pack 1 facing the exhaust hole 21; the exhaust port 11 and the exhaust hole 21 are cooperatively connected, and the area enclosed by the exhaust port 11 and the exhaust hole 21 is smaller than the area of ​​the gas buffer zone to increase the gas flow rate for discharge.

[0030] Furthermore, a pressure relief valve is provided in the battery pack 1, and the pressure relief valve is sealed in the gas buffer zone. The pressure relief valve is configured so that when thermal runaway occurs in the battery, the pressure relief valve opens and discharges the internal high-temperature gas into the gas buffer zone.

[0031] Exemplarily, the sealing cover of the exhaust port 11 is provided on the pressure relief valve, and the exhaust port 11 is protruded from the pressure relief valve for discharging gas through the battery compartment 2 .

[0032] In the present application, the battery compartment 2 has a hollow cavity accommodating area for accommodating and fixing the battery pack 1 , and the hollow cavity is recessed along the thickness direction of the battery compartment 2 .

[0033] Furthermore, the exhaust holes 21 penetrate the battery compartment 2. The exhaust holes 21 are distributed on both sides of the battery compartment 2, and the number of the exhaust holes 21 on both sides is preferably eight.

[0034] In the present application, the cross section of the exhaust port 11 is an isosceles trapezoid, the cross section of the exhaust hole 21 is a circle, and the diameter of the smallest cross section of the exhaust port 11 is smaller than the diameter of the cross section of the exhaust hole 21, so that the two can be embedded in each other.

[0035] For a more reliable connection, in the present application, the exhaust port 11 and the exhaust hole 21 are interference fit.

[0036] The present application also provides an aircraft, the aircraft cabin including the battery safety system as described in the above solution.

[0037] The above embodiments are merely illustrative of the principles and effects of this application. Anyone skilled in the art may modify or alter the above embodiments without departing from the objectives of this application. Therefore, all equivalent modifications or alterations made by persons skilled in the art without departing from the objectives disclosed herein are intended to be covered by the claims of this application.

Claims

1. A battery safety system, characterized in that: include: A plurality of battery packs, each having an exhaust port for exhausting gas inside the battery pack; A battery compartment is arranged in close contact with the battery pack, the battery compartment is provided with exhaust holes arranged in a one-to-one correspondence with the exhaust ports of the battery pack, and is used to exhaust gas from the battery compartment; A gas buffer zone is provided at one end of the battery pack facing the exhaust hole; The exhaust port and the exhaust hole are cooperatively connected, and an area enclosed by the exhaust port and the exhaust hole is smaller than an area of ​​the gas buffer zone so as to increase the gas flow rate for discharge.

2. The battery safety system according to claim 1, characterized in that: The battery pack is provided with a pressure relief valve, which is sealed in the gas buffer zone. The pressure relief valve is configured such that when thermal runaway occurs in the battery, the pressure relief valve opens and discharges the internal high-temperature gas into the gas buffer zone.

3. The battery safety system according to claim 1, characterized in that: The exhaust port sealing cover is arranged on the pressure relief valve, and the exhaust port is convexly arranged on the pressure relief valve, and is used for discharging gas through the battery compartment.

4. The battery safety system according to claim 1, characterized in that: The battery compartment has a hollow cavity containing area for accommodating and fixing the battery pack.

5. The battery safety system according to claim 4, characterized in that: The exhaust hole passes through the battery compartment.

6. The battery safety system according to claim 5, characterized in that: The exhaust holes are distributed on both sides of the battery compartment, and the number of the exhaust holes on both sides is eight.

7. The battery safety system according to claim 3, characterized in that: The cross section of the exhaust port is an isosceles trapezoid, the cross section of the exhaust hole is a circle, and the diameter of the minimum cross section of the exhaust port is smaller than the diameter of the cross section of the exhaust hole, so that the two can be embedded in each other.

8. The battery safety system according to claim 7, characterized in that: The exhaust port is interference-fitted with the exhaust hole.

9. The battery safety system according to claim 4, characterized in that: The hollow cavity is recessed along the thickness direction of the battery compartment.

10. An aircraft, characterized in that: An aircraft cabin comprises a battery safety system as claimed in any one of claims 1 to 9.

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