Liquid cooling system and aircraft comprising same

Abstract

The present invention relates to the technical field of batteries, and in particular to a liquid cooling system, comprising a plurality of battery packs, an outer cover, and a liquid cooling plate. The outer cover serves as a cover to cover the plurality of battery packs; the liquid cooling plate is attached to the bottoms of the plurality of battery packs; and the liquid cooling plate is provided with cooling pipelines and the cooling pipelines are filled with a cooling liquid to cool the plurality of battery packs.

Description

Liquid cooling system and aircraft including the same Technical Field

[0001] The present application 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.

[0003] Summary of the Invention

[0004] One object of the present application is to provide a liquid cooling system that can cool a battery pack.

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

[0006] A liquid cooling system comprising:

[0007] 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 lid;

[0008] A liquid cooling plate is arranged on the bottom of the battery packs. The liquid cooling plate is provided with a cooling pipe and filled with coolant for cooling the battery packs.

[0009] Preferably, it further includes a thermally conductive film adapted to the length of the multiple 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 multiple battery packs, for transferring the heat of the battery packs to the liquid cooling plate.

[0010] Preferably, the thermal conductive adhesive is made of polyurethane.

[0011] Preferably, the several battery packs include a first battery pack, a second battery pack, a third battery pack and a fourth battery pack; two cooling pipes are provided on the liquid cooling plate, 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.

[0012] 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.

[0013] Preferably, the flow rate of the first cooling pipe and the second cooling pipe is 0.5-1 L / min.

[0014] Preferably, the coolant is ethylene glycol.

[0015] Preferably, the initial temperature of the coolant is 25 degrees Celsius.

[0016] Preferably, the coolant cools the battery packs, and the temperature of the battery packs 1 after cooling does not exceed 35 degrees Celsius.

[0017] To achieve this goal, this application also adopts the following technical solutions:

[0018] An aircraft comprises the liquid cooling system as described in the above solution.

[0019] Beneficial effects of this application:

[0020] 1. This application uses a liquid cooling solution to cool the battery pack. After the battery pack generates heat during operation, the heat from the module is transferred to the liquid cooling system through thermal adhesive, and then the heat is quickly exchanged with the outside world through the liquid cooling system. By quickly transferring the heat from the battery pack to the outside world, the battery pack can always operate within the optimal temperature range, thereby extending the service life of the battery pack;

[0021] 2. Because aircraft arms are long, the battery system is also a long strip. This strip contains four battery packs connected in series. Traditionally, the coolant has one inlet and one outlet. After the coolant absorbs heat from the first and second battery packs, the temperature has already risen, so the cooling effect on the third and fourth battery packs is not significant. Therefore, this application adopts a dual-channel liquid cooling design with two inlets and two outlets. The first inlet covers the first and second battery packs, and the second inlet covers the third and fourth battery packs. This effectively solves the heat exchange problem for all battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the liquid cooling system of the present application;

[0023] FIG2 is a schematic diagram of the battery pack of the present application;

[0024] FIG3 is a schematic diagram of the cooling pipe of the present application. DETAILED DESCRIPTION

[0025] 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 the parts relevant to the present application are shown in the accompanying drawings, not all of them.

[0026] 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.

[0027] 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.

[0028] The present application provides a liquid cooling system, comprising:

[0029] The battery packs 1 are provided with a housing 2 and a liquid cooling plate 3. The housing 2 is provided as a lid on the battery packs 1. The liquid cooling plate 3 is attached to the bottom of the battery packs 1. The liquid cooling plate 3 is provided with cooling pipes and filled with coolant to cool the battery packs 1. Preferably, the coolant is ethylene glycol.

[0030] Furthermore, the cooling system of the present application also includes a thermally conductive adhesive sheet 4 adapted to the length of the battery packs 1. One side of the thermally conductive adhesive sheet 4 is attached to the liquid cooling plate 3, and the other side abuts the bottom of the battery packs 1, for transferring heat from the battery packs 1 to the liquid cooling plate 3. Preferably, the thermally conductive adhesive sheet 4 is made of polyurethane.

[0031] In this application, when the battery pack generates heat during operation, the heat from the module is transferred to the liquid cooling system through thermal adhesive. The liquid cooling system then quickly exchanges heat with the outside world. By quickly transferring the heat from the battery pack to the outside world, the battery pack can always operate within the optimal temperature range, extending the battery pack's service life.

[0032] In addition, in the present application, the several 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, and 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 pack to cover the bottom of the battery pack.

[0033] Because aircraft arms are long, the battery system is also a long strip, with four battery packs arranged in series. Traditionally, the coolant has one inlet and one outlet. After the coolant absorbs heat from the first and second battery packs, the temperature has already risen, so the cooling effect on the third and fourth battery packs is not significant. Therefore, this application adopts a dual-channel liquid cooling design with two inlets and two outlets. The first inlet covers the first and second battery packs, and the second inlet covers the third and fourth battery packs, which can effectively solve the heat exchange problem of all battery packs.

[0034] 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.

[0035] 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.

[0036] The present application also provides an aircraft, which includes the liquid cooling system 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 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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