Battery safety system and aircraft comprising same

Abstract

The invention relates to the technical field of batteries, in particular to a battery safety system which comprises a plurality of battery packs and battery cabins attached to the battery packs, and the battery packs are provided with exhaust ports used for exhausting gas in the battery packs; a gas buffer area is arranged at one end of the battery pack facing the exhaust hole; the exhaust port and the exhaust hole are connected in a matched mode, and the area defined by the exhaust port and the exhaust hole is smaller than the area of the gas buffering area so that the gas flow speed can be increased for discharging.

Description

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 EVTOL, after the battery cells in the battery module have thermal runaway, high-temperature gases and particles will be discharged into the battery compartment, and then enter the passenger cabin, affecting the safety of passengers. Therefore, it is necessary to design a battery safety system that can discharge the high-temperature gases and particles after the thermal runaway of the battery cells to the outside of the battery compartment. Summary of the invention

[0003] 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 to the outside of the battery compartment.

[0004] To achieve this goal, this application adopts the following technical solutions:

[0005] A battery safety system, comprising:

[0006] A plurality of battery packs, each having an exhaust port for exhausting gas inside the battery pack;

[0007] 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;

[0008] A gas buffer zone is provided at one end of the battery pack facing the exhaust hole;

[0009] 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.

[0010] 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.

[0011] Preferably, the exhaust port sealing cover is provided on the pressure relief valve, and the exhaust port is protruding from the pressure relief valve for discharging gas through the battery compartment.

[0012] Preferably, the battery compartment has a hollow cavity accommodating area for accommodating and fixing the battery pack.

[0013] Preferably, the exhaust hole passes through the battery compartment.

[0014] 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.

[0015] Preferably, the cross section of the air outlet is an isosceles trapezoid, the cross section of the exhaust hole is a circle, and the diameter of the minimum cross section of the air outlet is smaller than the diameter of the cross section of the exhaust hole, so that the two can be embedded in each other.

[0016] Preferably, the air outlet is interference fit with the exhaust hole.

[0017] Preferably, the hollow cavity is recessed along the thickness direction of the battery compartment.

[0018] To achieve this purpose, this application also adopts the following technical solutions:

[0019] An aircraft, the aircraft cabin includes the battery safety system as described in the above solution.

[0020] Beneficial effects of this application:

[0021] The battery safety system provided in the present 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 inside the battery pack, the high-temperature gas and particulate matter discharged from the exhaust ports of the battery pack are directly discharged from the exhaust holes in the battery compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the battery pack and battery compartment of the present application;

[0023] Figure 2 is a schematic diagram of the exhaust port and exhaust hole of the present application;

[0024] Figure 3 It is a partial enlarged view of the exhaust port and exhaust hole of the present application. DETAILED DESCRIPTION

[0025] The following embodiments further illustrate the technical solution of the present application. It is to be understood that the specific embodiments described herein are only used to explain the present application. It should also be noted that, for ease of description, only the parts related to the present application are shown in the drawings, not all.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The present application provides a battery safety system, including a plurality of battery packs 1 and a battery compartment 2 fitted with the battery packs 1, the battery packs 1 having an exhaust port 11 for discharging gas inside the battery pack; the battery compartment 2 having exhaust holes 21 arranged one-to-one corresponding to the battery pack exhaust port 11 for discharging gas from the battery compartment 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 an area enclosed by the exhaust port 11 and the exhaust hole 21 is smaller than an area of ​​the gas buffer zone to increase the gas flow rate for discharge.

[0029] 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 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.

[0030] Exemplarily, the sealing cover of the exhaust port 11 is disposed 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 .

[0031] 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 .

[0032] 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.

[0033] 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.

[0034] For a more reliable connection, in the present application, the exhaust port 11 and the exhaust hole 21 are interference fit.

[0035] The present application also provides an aircraft, the aircraft cabin including a battery safety system as described in the above solution.

[0036] The above embodiments are merely illustrative of the principles and effects of the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the purpose of the present application. Therefore, all equivalent modifications or changes made by a person with ordinary knowledge in the relevant technical field without departing from the purpose disclosed in the present application shall still be covered by the claims of the present 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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