Liquid cooling flat cable for charging electric automobile

Abstract

The invention relates to the technical field of wires and cables, and discloses a liquid cooling flat cable for charging an electric vehicle, which comprises an outer sheath, power wire cores, control wire cores and a plurality of liquid cooling pipes, and is characterized in that the outer sheath is flat on the whole; the plurality of liquid cooling pipes penetrate through the outer sheath and are distributed along the length direction of the cross section of the outer sheath, and the liquid cooling pipes are hollow; a power wire core is arranged in each liquid cooling pipe in a penetrating manner, liquid cooling flow channels are formed between the power wire cores and the liquid cooling pipes, the liquid cooling pipes are arranged in pairs, and the liquid cooling flow channels of each pair of liquid cooling pipes are communicated and form a liquid cooling loop; the control wire cores are arranged in the outer sheath and are located outside the liquid cooling pipes. According to the liquid cooling flat cable for charging the electric vehicle, the liquid cooling pipe is additionally arranged in the cable, the power wire cores are arranged in the liquid cooling pipe, the liquid cooling heat dissipation efficiency is improved, the high-power charging requirement is met, the cable is integrally designed to be flat, the bending radius of the cable is reduced, the bending performance of the cable is improved, and the occupied space after the cable is bent is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wires and cables, and in particular to a liquid-cooled flat cable for charging electric vehicles. Background Art

[0002] As the power of the battery packs carried by electric vehicles increases, the required charging power is getting higher and higher. In addition to increasing the voltage platform of electric vehicles, the increase in charging power also requires a significant increase in charging current to achieve megawatt-level high-power fast charging. Increasing the charging current requires a larger cable cross-section, but it also makes the cable thicker and heavier, making the charging operation more difficult. The liquid-cooled charging cables currently on the market generally adopt a circular twisted structure. Affected by the internal liquid cooling pipeline and the core structure, the cable has a large bending radius and may interfere with vehicles in adjacent parking spaces when charging. Therefore, a charging cable that can dissipate heat by liquid cooling is needed, using a smaller conductor cross-section, a thinner outer diameter and a lighter weight to meet the requirements of high-power charging with a larger current. Summary of the invention

[0003] The object of the present invention is to provide a liquid-cooled flat cable for charging electric vehicles to solve the problems mentioned in the above background technology.

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

[0005] A liquid-cooled flat cable for charging an electric vehicle, comprising an outer sheath, a power core, a control core and a plurality of liquid cooling tubes, wherein:

[0006] The outer sheath is flat, and the ratio of the cross-sectional length to the cross-sectional width of the outer sheath is greater than 1;

[0007] A plurality of liquid cooling pipes are inserted into the outer sheath and distributed along the cross-sectional length direction of the outer sheath, and the liquid cooling pipes are hollow;

[0008] A power line core is passed through each liquid cooling tube, and a liquid cooling channel is formed between the power line core and the liquid cooling tube. The liquid cooling tubes are arranged in pairs, and the liquid cooling channels of each pair of liquid cooling tubes are connected to form a liquid cooling circuit.

[0009] The control wire core is arranged in the outer sheath and is located outside each liquid cooling tube.

[0010] As an optional solution, each power line core is formed by regularly twisting a plurality of power line core conductors.

[0011] As an optional solution, the outer sheath is formed by extruding the temperature-resistant insulating material integrally outside the liquid cooling tube and the control wire core.

[0012] As an optional solution, the liquid cooling tubes are distributed at intervals in the outer jacket.

[0013] As an optional solution, the liquid cooling tubes are adjacent to each other in the outer jacket and are wrapped by a tape to form a group.

[0014] As an optional solution, two pairs of liquid cooling tubes are adjacent to each other, and liquid cooling tubes in different pairs are spaced apart from each other.

[0015] As an optional solution, the control core is formed by twisting a plurality of control core conductors into a cable, and the control core and each liquid cooling tube are located on the same straight line.

[0016] As an optional solution, the control line core is located in the middle of the outer sheath, and a plurality of liquid cooling tubes are symmetrically distributed on both sides of the control line core.

[0017] As an optional solution, the control core is cabled by a single control core conductor, and a plurality of control cores are dispersed in the outer sheath.

[0018] As an optional solution, the cross-section of the outer sheath is a rounded rectangle or an ellipse.

[0019] Beneficial effects of the present invention:

[0020] The liquid-cooled flat cable for electric vehicle charging has a liquid cooling tube added inside, and the power line core is arranged in the liquid cooling tube, which improves the liquid cooling heat dissipation efficiency and meets the requirements of high-power charging. The cable is designed to be flat as a whole. When the cable is in a bending state such as hanging or storage, it will naturally bend in the direction of the narrow and flat dimension of the cable, reducing the bending radius of the cable, improving the bending performance of the cable, and reducing the space occupied by the cable after bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a liquid-cooled flat cable for charging an electric vehicle provided in an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of a liquid-cooled flat cable for charging an electric vehicle provided in an embodiment of the present invention;

[0023] Figure 3 It is another cross-sectional schematic diagram of a liquid-cooled flat cable for charging an electric vehicle provided in an embodiment of the present invention.

[0024] In the attached figure:

[0025] 1. Outer sheath; 2. Liquid cooling tube; 3. Power line core; 31. Power line core conductor; 4. Control line core; 41. Control line core conductor; 42. Shielding layer; 5. Liquid cooling channel. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, 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.

[0029] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", etc. are merely used to distinguish in description and have no special meanings.

[0031] See also Figures 1 to 3 As shown, this embodiment provides a liquid-cooled flat cable for charging an electric vehicle, comprising an outer sheath 1, a power core 3, a control core 4 and a plurality of liquid cooling tubes 2, wherein:

[0032] The outer sheath 1 is flat, and the ratio of the cross-sectional length to the cross-sectional width of the outer sheath 1 is greater than 1;

[0033] A plurality of liquid cooling tubes 2 are inserted into the outer jacket 1 and distributed along the cross-sectional length direction of the outer jacket 1, and the liquid cooling tubes 2 are hollow;

[0034] A power line core 3 is passed through each liquid cooling tube 2, and a liquid cooling channel 5 is formed between the power line core 3 and the liquid cooling tube 2. The liquid cooling tubes 2 are arranged in pairs, and the liquid cooling channels 5 of each pair of liquid cooling tubes 2 are connected to form a liquid cooling circuit.

[0035] The control core 4 is arranged in the outer sheath 1 and is located outside each liquid cooling tube 2 .

[0036] Therefore, the liquid-cooled flat cable for charging electric vehicles has a liquid cooling tube 2 added inside, and the power line core 3 is arranged in the liquid cooling tube 2, which improves the liquid cooling heat dissipation efficiency and meets the requirements of high-power charging. The cable is designed to be flat as a whole. When the cable is in a bending state such as hanging or storage, it will naturally bend in the direction of the narrow and flat dimension of the cable, reducing the bending radius of the cable, improving the bending performance of the cable, and reducing the space occupied by the cable after bending.

[0037] Optionally, each power core 3 is formed by regular twisting of multiple power core conductors 31. The coolant flowing in the liquid cooling channel 5 directly contacts the power core conductors 31 to form heat exchange, and the heat of the power core 3 is taken away with maximum efficiency, ensuring that the temperature of the cable is stable when working under high load.

[0038] Optionally, the outer sheath 1 is formed by extruding a heat-resistant insulating material integrally outside the liquid cooling tube 2 and the control core 4. The heat-resistant insulating material may be polyurethane, polytetrafluoroethylene, etc., to ensure that the outer sheath 1 can still maintain good insulation performance and mechanical strength in a high temperature environment, further improve the overall safety and reliability of the cable, and adapt to various complex use environments.

[0039] Optionally, each liquid cooling tube 2 is distributed at intervals in the outer jacket 1. Figure 2 For example, the spacing design of each liquid cooling tube 2 avoids mutual interference between the liquid cooling tubes 2, ensures the heat dissipation effect, and improves the overall stability and service life of the cable.

[0040] In addition to the above-mentioned spacing distribution, the liquid cooling tubes 2 can also be adjacent to each other in the outer sheath 1 and wrapped by the wrapping tape to form a group, thereby enhancing the fixation of the multiple liquid cooling tubes 2 and ensuring that the cable structure is more stable. Alternatively, the two pairs of liquid cooling tubes 2 are adjacent to each other, and the liquid cooling tubes 2 of different pairs are separated from each other, such as Figure 3 As shown, it is ensured that the paths of each liquid cooling circuit are the shortest and independent of each other.

[0041] Optionally, the control core 4 is twisted into a cable by a plurality of control core conductors 41, and the control core 4 is located on the same straight line as each liquid cooling tube 2. The internal space of the outer sheath 1 is fully utilized, the internal structure layout of the cable is optimized, the space waste is reduced, and the overall compactness and use efficiency of the cable are further improved. In addition, the surface of the control core 4 is coated with a shielding layer 42 to ensure the stability and safety of signal transmission, effectively reduce external electromagnetic interference, and improve the quality of signal transmission.

[0042] Furthermore, the control core 4 is located in the middle of the outer sheath 1, and a plurality of liquid cooling tubes 2 are symmetrically distributed on both sides of the control core 4. This layout makes the internal structure of the cable more symmetrical and the force is evenly distributed, avoiding the bending deformation problem caused by eccentricity, and further enhancing the overall stability and service life of the cable; at the same time, the control core 4 in the middle is protected by the liquid cooling tubes 2 on both sides, effectively reducing the risk of external physical damage and ensuring the reliability of signal transmission.

[0043] In this embodiment, taking four (two pairs) liquid cooling tubes 2, four power cores 3, and one control core 4 as an example, each power core 3 is passed through a liquid cooling tube 2, and the liquid cooling channels 5 in the two pairs of liquid cooling tubes 2 are connected to form two liquid cooling circuits. The four liquid cooling tubes 2 are located in a straight line, and one control core 4 is located in the middle position of the two pairs of liquid cooling tubes 2.

[0044] Alternatively, the control core 4 is cabled by a single control core conductor 41, and a plurality of control cores 4 are dispersed in the outer sheath 1. Thus, the internal space of the outer sheath 1 is fully utilized, the flexibility and adaptability of the cable are enhanced, the efficiency and stability of signal transmission are ensured, and the comprehensive performance of the cable is further improved.

[0045] Optionally, the cross-sectional shape of the outer sheath 1 is a rounded rectangle or an ellipse, which ensures that the outer surface of the outer sheath 1 is rounded, reduces external friction, improves the durability and safety of the cable in complex environments, and ensures long-term stable operation.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Liquid-cooled flat cable for electric vehicle charging, characterized in that: It comprises an outer sheath (1), a power line core (3), a control line core (4) and a plurality of liquid cooling tubes (2), wherein: The outer sheath (1) is flat, and the ratio of the cross-sectional length to the cross-sectional width of the outer sheath (1) is greater than 1; A plurality of the liquid cooling pipes (2) are inserted into the outer jacket (1) and distributed along the cross-sectional length direction of the outer jacket (1); the liquid cooling pipes (2) are hollow; Each of the liquid cooling tubes (2) is provided with a power line core (3), a liquid cooling channel (5) is formed between the power line core (3) and the liquid cooling tube (2), the liquid cooling tubes (2) are arranged in pairs, and the liquid cooling channels (5) of each pair of the liquid cooling tubes (2) are connected to form a liquid cooling circuit; The control wire core (4) is arranged in the outer sheath (1) and is located outside each of the liquid cooling tubes (2).

2. The liquid-cooled flat cable for charging electric vehicles according to claim 1, characterized in that: Each of the power line cores (3) is formed by regularly twisting a plurality of power line core conductors (31).

3. The liquid-cooled flat cable for charging electric vehicles according to claim 1, characterized in that: The outer sheath (1) is made of a temperature-resistant insulating material and is integrally extruded outside the liquid cooling tube (2) and the control wire core (4).

4. The liquid-cooled flat cable for charging electric vehicles according to claim 1, characterized in that: The liquid cooling tubes (2) are distributed at intervals inside the outer jacket (1).

5. The liquid-cooled flat cable for charging electric vehicles according to claim 1, characterized in that: The liquid cooling tubes (2) are adjacent to each other in sequence in the outer jacket (1) and are wrapped by a wrapping tape to form a group.

6. The liquid-cooled flat cable for charging electric vehicles according to claim 1, characterized in that: The two liquid cooling tubes (2) in a pair are adjacent to each other, and the liquid cooling tubes (2) in different pairs are spaced apart from each other.

7. The liquid-cooled flat cable for charging electric vehicles according to claim 1, characterized in that: The control core (4) is formed by twisting a plurality of control core conductors (41) into a cable, and the control core (4) and each of the liquid cooling tubes (2) are located on the same straight line.

8. The liquid-cooled flat cable for charging electric vehicles according to claim 7, characterized in that: The control wire core (4) is located in the middle of the outer sheath (1), and the plurality of liquid cooling tubes (2) are symmetrically distributed on both sides of the control wire core (4).

9. The liquid-cooled flat cable for charging electric vehicles according to claim 1, characterized in that: The control core (4) is cabled by a single control core conductor (41), and a plurality of the control cores (4) are dispersed in the outer sheath (1).

10. The liquid-cooled flat cable for charging electric vehicles according to claim 1, characterized in that: The cross-sectional shape of the outer sheath (1) is a rounded rectangle or an ellipse.

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