Liquid cooling system and aircraft comprising same

Abstract

The invention relates to the technical field of batteries, in particular to a liquid cooling system which comprises a plurality of battery packs, an outer cover and a liquid cooling plate, the outer cover covers the plurality of battery packs in the form of a cover; the liquid cooling plate is attached to the bottoms of the plurality of battery packs, a cooling pipeline is arranged in the liquid cooling plate, and the liquid cooling plate is filled with cooling liquid and used for cooling the plurality of battery packs.

Description

Technical Field

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

[0002] Currently, most battery packs are air-cooled, which has poor heat dissipation capacity. When the temperature exceeds a certain value, the battery pack's discharge capacity will be weakened, which will reduce the aircraft's flight speed and fail to achieve the desired goal. Summary of the invention

[0003] An object of the present invention is to provide a liquid cooling system that can cool a battery pack.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A liquid cooling system, comprising:

[0006] A plurality of battery packs and an outer cover, wherein the outer cover is provided on the plurality of battery packs in the form of a cover;

[0007] A liquid cooling plate is arranged on the bottom of the plurality of battery packs, wherein a cooling pipe is arranged in the liquid cooling plate and is filled with a cooling liquid, so as to cool the plurality of battery packs.

[0008] Preferably, it also includes a thermally conductive film adapted to the length of the battery packs, one side of the thermally conductive film is attached to the liquid cooling plate, and the other side is in contact with the bottom of the battery packs, so as to transfer the heat of the battery packs to the liquid cooling plate.

[0009] Preferably, the thermally conductive adhesive is made of polyurethane.

[0010] Preferably, the several battery packs include a first battery pack, a second battery pack, a third battery pack and a fourth battery pack; the liquid cooling plate is provided with two cooling pipes, which are divided into a first cooling pipe and a second cooling pipe, the first cooling pipe transversely covers the bottom of the first battery pack and the second battery pack, and the second cooling pipe transversely covers the bottom of the third battery pack and the fourth battery pack.

[0011] Preferably, the first cooling pipe and the second cooling pipe repeatedly extend to cover the bottom of the battery pack along both ends of the length direction of the battery pack that they cover laterally.

[0012] Preferably, the flow rate of the first cooling pipe and the second cooling pipe is 0.5-1 L / min.

[0013] Preferably, the coolant is ethylene glycol.

[0014] Preferably, the initial temperature of the coolant is 25 degrees Celsius.

[0015] Preferably, the coolant cools the battery packs, and the temperature of the battery packs 1 after cooling does not exceed 35 degrees Celsius.

[0016] To achieve this object, the present invention also adopts the following technical solutions:

[0017] An aircraft comprises a liquid cooling system as described in the above solution.

[0018] Beneficial effects of the present invention:

[0019] 1. This application adopts a liquid cooling solution to cool the battery pack. After the battery pack generates heat during operation, the heat of the module is transferred to the liquid cooling system through the thermal conductive adhesive, and then the heat is quickly exchanged with the outside world through the liquid cooling system. By quickly transferring the heat of the battery pack to the outside world, the battery pack can always work within the optimal temperature range, thereby increasing the service life of the battery pack;

[0020] 2. Because the aircraft arm is long, the battery system is also a long strip, and a long strip is arranged with 4 battery packs in series. The traditional flow channel is one inlet and one outlet. After the coolant absorbs the heat of the first and second battery packs, the temperature has risen, so the cooling effect of the third and fourth battery packs is not obvious. Therefore, this application adopts a dual-channel liquid cooling design with two inlets and two outlets. The first inlet and outlet cover the first and second battery packs, and the second inlet and outlet cover the third and fourth battery packs, which can effectively solve the problem of heat exchange of all battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the liquid cooling system of the present application;

[0022] Figure 2 is a schematic diagram of the battery pack of the present application;

[0023] Figure 3 It is a schematic diagram of the cooling pipeline of this application. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The present invention provides a liquid cooling system, comprising:

[0028] Several battery packs 1, outer covers 2 and liquid cooling plates 3, wherein the outer covers 2 are provided on the several battery packs 1 in the form of a lid; the liquid cooling plates 3 are provided on the bottom of the several battery packs 1, and the liquid cooling plates 3 are provided with cooling pipes and filled with coolant for cooling the several battery packs 1. Preferably, the coolant is ethylene glycol.

[0029] Furthermore, the cooling system of the present application also includes a thermally conductive adhesive sheet 4 adapted to the length of the plurality of battery packs 1, one side of the thermally conductive adhesive sheet 4 is fitted on the liquid cooling plate 3, and the other side is abutted against the bottom of the plurality of battery packs 1, for transferring the heat of the battery packs 1 to the liquid cooling plate 3. Preferably, the thermally conductive adhesive sheet 4 is made of polyurethane.

[0030] In this application, when the battery pack generates heat during operation, the heat of the module is transferred to the liquid cooling system through the thermal conductive adhesive, and then the heat is quickly exchanged with the outside world through the liquid cooling system. By quickly transferring the heat of the battery pack to the outside world, the battery pack can always work within the optimal temperature range, thereby increasing the service life of the battery pack.

[0031] In addition, in the present application, the plurality of battery packs 1 include a first battery pack 11, a second battery pack 12, a third battery pack 13 and a fourth battery pack 14; two cooling pipes are provided on the liquid cooling plate 3, which are divided into a first cooling pipe 31 and a second cooling pipe 32, the first cooling pipe 31 transversely covers the bottom of the first battery pack 11 and the second battery pack 12, the second cooling pipe 32 transversely covers the bottom of the third battery pack 13 and the fourth battery pack 14, and the first cooling pipe 31 and the second cooling pipe 32 repeatedly extend along both ends of the length direction of the transversely covered battery packs to cover the bottom of the battery packs.

[0032] Because the aircraft arm is long, the battery system is also a long strip, and a long strip is arranged with 4 battery packs in series. The traditional flow channel is one inlet and one outlet. After the coolant absorbs the heat of the first and second battery packs, the temperature has risen, so the cooling effect of the third and fourth battery packs is not obvious. Therefore, this application adopts a dual-channel liquid cooling design with two inlets and two outlets. The first inlet and outlet cover the first and second battery packs, and the second inlet and outlet cover the third and fourth battery packs, which can effectively solve the problem of heat exchange of all battery packs.

[0033] Exemplarily, the flow rate of the first cooling pipe 31 and the second cooling pipe 32 is 0.5-1 L / min, and the initial temperature of the coolant is 25 degrees Celsius.

[0034] Furthermore, in the present application, after the coolant cools the plurality of battery packs 1 , the temperature of the plurality of battery packs 1 after cooling does not exceed 35 degrees Celsius.

[0035] The present invention also provides an aircraft, which includes the liquid cooling system described in the above scheme.

[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 liquid cooling system, characterized in that: include: A plurality of battery packs and an outer cover, wherein the outer cover is provided on the plurality of battery packs in the form of a cover; A liquid cooling plate is arranged on the bottom of the plurality of battery packs, wherein a cooling pipe is arranged in the liquid cooling plate and is filled with a cooling liquid, so as to cool the plurality of battery packs.

2. The liquid cooling system according to claim 1, characterized in that: It also includes a thermally conductive film adapted to the length of the battery packs, one side of the thermally conductive film is attached to the liquid cooling plate, and the other side is in contact with the bottom of the battery packs, so as to transfer the heat of the battery packs to the liquid cooling plate.

3. The liquid cooling system according to claim 2, characterized in that: The thermal conductive adhesive is made of polyurethane.

4. The liquid cooling system according to claim 1, characterized in that: The plurality of battery packs include a first battery pack, a second battery pack, a third battery pack and a fourth battery pack; The liquid cooling plate is provided with two cooling pipes, which are divided into a first cooling pipe and a second cooling pipe. The first cooling pipe transversely covers the bottom of the first battery pack and the second battery pack, and the second cooling pipe transversely covers the bottom of the third battery pack and the fourth battery pack.

5. The liquid cooling system according to claim 4, characterized in that: The first cooling pipe and the second cooling pipe repeatedly extend and cover the bottom of the battery pack along both ends of the length direction of the battery pack that they cover laterally.

6. The liquid cooling system according to claim 5, characterized in that: The flow rates of the first cooling pipe and the second cooling pipe are 0.5-1 L / min.

7. The liquid cooling system according to claim 1, characterized in that: The coolant is ethylene glycol.

8. The liquid cooling system according to claim 1, characterized in that: The initial temperature of the coolant is 25 degrees Celsius.

9. The liquid cooling system according to claim 1, characterized in that: The coolant cools the battery packs, and the temperature of the battery packs after cooling does not exceed 35 degrees Celsius.

10. An aircraft, characterized in that: The aircraft comprises the liquid cooling system according to any one of claims 1-9.

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