A cable for new energy vehicles

Abstract

The present application discloses a cable device for new energy vehicles, which relates to the field of automotive cables, including: a cable core, the outer side of which is wrapped with an insulating layer; a sheath, which is sleeved on the insulating layer, the sheath is provided with a receiving cavity, and a coolant is placed in the receiving cavity; a shell, the shell is wrapped and arranged on the sheath, the shell is provided with an extrusion groove; an extrusion piece, the extrusion piece can pass through the extrusion groove, and the extrusion piece is used to squeeze the sheath to make the coolant in the sheath flow. By adopting the above technical solution, the cable is protected from the influence of overheating of local hot spots, thereby achieving the effect of increasing the service life of the cable.

Description

Technical Field

[0001] The present application relates to the technical field of automotive cables, and in particular to a cable for new energy vehicles. Background Art

[0002] As people's living standards are getting higher and higher, people's awareness of protecting the earth's environment in their own place of residence is gradually increasing, and non-environmentally friendly products are gradually being eliminated. In particular, today's means of transportation are becoming more and more environmentally friendly. As the technology of new energy vehicles becomes more and more mature, new energy vehicles are being used more and more. However, there are also some disadvantages in the use of cables for new energy electric vehicles. For example, the motor of new energy electric vehicles will generate a certain amount of heat during operation. Especially when driven at high load or high speed, the temperature of the motor will rise sharply, and the temperature of the cable near the motor will also rise. Excessive temperature may even cause a fire.

[0003] To this end, the related art discloses a flexible cable for new energy vehicles, which has a conductor and an insulating layer covering the conductor, the insulating layer is covered with a cooling layer, and the cooling layer has at least one cooling medium channel extending along the length direction of the insulating layer, and the cooling medium channel is used to introduce a cooling medium to cool and dissipate heat from the insulating layer. Although the related art cools the cable through the cooling medium channel to avoid the occurrence of fire, there is a risk of leakage of the cooling medium due to the opening of the circulating cooling medium channel. Summary of the invention

[0004] The purpose of the present invention is to provide a cable for new energy vehicles to solve the technical problem that when local hot spots appear in the cables for new energy vehicles and the cooling is performed, the coolant is easily leaked, thereby resulting in a short service life of the cables.

[0005] The present application provides a cable for new energy vehicles comprising:

[0006] A cable core, wherein the outer side of the cable core is wrapped with an insulating layer;

[0007] A sheath, which is sleeved on the insulating layer, and the sheath is provided with a receiving cavity, in which a coolant is placed;

[0008] A shell, the shell is wrapped around the sheath, and the shell is provided with an extrusion groove;

[0009] An extrusion piece, wherein the extrusion piece can pass through the extrusion groove, and the extrusion piece is used for extruding the jacket to make the coolant in the jacket flow.

[0010] By adopting the above technical solution, leakage of the coolant is avoided, and the coolant can flow and absorb heat, thereby protecting the cable from overheating due to local hot spots, thereby achieving the effect of increasing the service life of the cable.

[0011] Optionally, a baffle is also provided in the sheath, one side of the baffle is fixedly connected to the inner wall of the sheath, and the other side of the baffle is fixedly connected to the insulating layer, the baffle separates the accommodating cavity into a first cavity and a second cavity, and the baffle is also provided with a circulation hole near the end of the sheath, and the circulation holes are respectively interconnected with the first cavity and the second cavity.

[0012] By adopting the above technical solution, the baffle divides the accommodating cavity into two chambers, so that when the extrusion part extrude the sheath through the extrusion groove, the coolant can circulate, further improving the heat dissipation effect and stability of the cable, so that the cable can still maintain good temperature control under high load and extreme working conditions.

[0013] Optionally, the extrusion member comprises:

[0014] A rotor, wherein the rotor is arranged on the housing relative to the extrusion groove, the sleeve is arranged along the circumference of the rotor, and the sleeve is intermittently extruded through the extrusion groove when the rotor rotates, so that the coolant in the sleeve circulates;

[0015] An electric motor, wherein a rotating shaft of the electric motor is connected to the rotor, and the electric motor is used for driving the rotor to rotate.

[0016] By adopting the above technical solution, the rotor squeezes the sheath through the extrusion groove, thereby promoting the circulation of the coolant in the sheath to take away the heat. Secondly, the shaft of the motor is connected to the rotor. Through the drive of the motor, the rotor can be controlled to rotate periodically to squeeze the sheath, so that the coolant can circulate in the sheath, thereby achieving a uniform cooling effect on the cable.

[0017] Optionally, an elliptical disk is disposed outside the rotor, the center of the elliptical disk coincides with the axis of the rotor, and the long end of the elliptical disk is used to squeeze the coolant in the sheath.

[0018] By adopting the above technical solution, an elliptical disk is arranged outside the rotor, and its center coincides with the axis of the rotor. As the elliptical disk rotates, the long end of the elliptical disk continuously squeezes the coolant in the jacket, so that the coolant circulates and is evenly distributed to improve the heat dissipation effect.

[0019] Optionally, spherical protrusions are provided on both sides of the long end of the elliptical disk, and the spherical protrusions press against the sheath.

[0020] By adopting the above technical solution, when the spherical protrusion contacts the sleeve, the raised part of the spherical protrusion contacts the sleeve to form a gap, so that the contact part of the spherical protrusion and the sleeve is more easily squeezed, so that the coolant can flow better around the raised part to improve the heat dissipation effect.

[0021] Optionally, a driving member is further included, wherein the driving member is fixedly connected to the end of the sheath, and the driving member is used to drive the sheath to be slidably connected relative to the cable core.

[0022] By adopting the above technical solution, the driving member drives the sheath to slide relative to the cable core. By adjusting the position of the sheath relative to the cable core, the sheath is subjected to uniform pressure to avoid frequent local squeezing, thereby reducing fatigue damage to the sheath.

[0023] Optionally, the shell is further provided with an avoidance notch, and when the long end of the elliptical disk approaches the avoidance notch, the protrusion is separated from the sheath.

[0024] By adopting the above technical solution, the avoidance notch enables the driving member to easily move the sheath to the desired position, avoiding frequent squeezing of the local area of ​​the sheath by the protrusion. When the protrusion moves to the avoidance notch, the squeezing state between the protrusion and the sheath changes to a separation or abutment state, reducing the friction resistance required to move the sheath, reducing the force applied by the driving member to the sheath, improving the driving efficiency, and reducing the wear of the sheath.

[0025] Optionally, the driving member includes:

[0026] A telescopic rod, the telescopic rod is fixedly connected to the end of the sheath;

[0027] A motor is fixedly connected to the telescopic rod, and the motor is used to drive the telescopic rod to move.

[0028] By adopting the above technical solution, the telescopic rod is fixedly connected to the motor to drive the movement of the telescopic rod, thereby facilitating the driving member to drive the sheath to move relative to the cable core, so that the driving member can accurately and reliably drive the telescopic rod to move the sheath relative to the cable core to the desired position.

[0029] Optionally, a heat insulation layer is provided on the outer side of the shell away from the extrusion groove.

[0030] By adopting the above technical solution, the heat insulation layer can effectively isolate the high temperature generated by automobile components such as the engine, reduce the heat conduction to the shell, and reduce the impact of temperature changes of high-temperature components on the cable.

[0031] Optionally, the sheath is made of PTFE with a compression modulus of 0.5 GPa-0.7 GPa.

[0032] By adopting the above technical solution and using PTFE with high temperature resistance and low friction, it is easier to extrude the sheath and reduce the friction consumption between the extruder and the sheath.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. By setting the cable core, sheath, shell and extrusion parts, the coolant can flow and absorb heat, thereby protecting the cable from overheating due to local hot spots, thereby achieving the effect of increasing the service life of the cable;

[0035] 2. By setting baffles and opening circulation holes in the sheath, the temperature distribution in the entire accommodating cavity is more uniform, avoiding overheating of a certain part of the accommodating cavity, further improving the heat dissipation effect and stability of the cable, so that the cable can still maintain good temperature control under high load and extreme working conditions;

[0036] 3. By setting the rotor, the elliptical disk and the circular protrusion, the periodic rotation of the rotor can be controlled so that the spherical protrusion squeezes the sheath, so that the coolant can circulate in the sheath, thereby achieving a uniform cooling effect on the cable;

[0037] 4. By setting the driving member and the avoidance gap, when the sheath is frequently squeezed locally, the driving member drives the sheath to change the squeezing area, so that the sheath is more evenly stressed and local fatigue loss is avoided;

[0038] 5. By using high-temperature-resistant and low-friction PTFE for the sheath, it is easier to extrude the sheath and reduce the friction consumption between the extruder and the sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic diagram of the overall structure in Example 1 of the present application;

[0040] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0041] Figure 3 It is a half-section view of the sheath;

[0042] Figure 4 is a top view of the overall structure of Example 2;

[0043] Figure 5 It is a cross-sectional view of the shell in Example 2.

[0044] In the figure: 1, cable core; 11, insulation layer; 2, sheath; 21, accommodating chamber; 211, first chamber; 212, second chamber; 22, baffle; 221, circulation hole; 3, shell; 31, extrusion groove; 32, avoidance gap; 4, extrusion piece; 41, motor; 42, elliptical disk; 43, spherical protrusion; 5, driving piece; 51, telescopic rod; 52, motor. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.

[0046] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0047] Embodiment 1:

[0048] Reference Figure 1 A cable for new energy vehicles includes a cable core 1, a sheath 2, a shell 3 and an extruded part 4.

[0049] The outer side of the cable core 1 is wrapped with an insulating layer 11, and the cable core 1 includes a plurality of conductors and a flame retardant layer. The sheath 2 is wrapped and sleeved on the insulating layer 11, and a housing cavity 21 is provided inside the sheath 2, and a coolant is placed in the housing cavity 21. The coolant in the sheath 2 is used to cool the cable core 1. In addition, new energy vehicles may encounter external impact forces such as bumps and collisions during driving, and these external impact forces pose a threat to the safety and stability of the cable. By placing a coolant in the sheath 2, not only can the heat dissipation of the local hot spots of the cable be achieved, but also the sheath 2 is provided with a function of buffering external impact forces. The presence of the coolant forms a buffer medium inside the sheath 2. When an external impact acts on the cable, the coolant can absorb and disperse part of the impact force, thereby reducing the direct impact of the impact on the cable. This buffering effect helps to protect the insulating layer 11 and the cable core 1 inside the cable from damage by external impact forces.

[0050] The shell 3 is wrapped around the sheath 2. In this embodiment, the sheath 2 is fixedly connected to the shell 3. An extrusion groove 31 is provided on the right inner wall of the shell 3. The extrusion groove 31 partially exposes the sheath 2. The extrusion piece 4 can pass through the extrusion groove 31 to extrude the sheath 2, so that the coolant in the sheath 2 flows. When the cable is close to the high-temperature components in the car, a local hot spot is generated. By providing a receiving cavity 21 in the sheath 2 of the cable and placing the coolant, the heat dissipation of the local hot spot of the cable is achieved, and the safety of the cable is effectively ensured. At the same time, the leakage of the coolant is avoided by providing a sheath 2 sealed with coolant. The extrusion piece 4 and the extrusion groove 31 on the shell 3 cooperate with each other, so that the coolant can flow and absorb heat, thereby protecting the cable from the influence of overheating of the local hot spot, thereby achieving the effect of improving the service life of the cable.

[0051] A baffle 22 is also provided in the jacket 2, one side of the baffle 22 is fixedly connected to the inner wall of the jacket 2, and the other side of the baffle 22 is fixedly connected to the insulating layer 11. The baffle 22 divides the accommodating chamber 21 into a first chamber 211 and a second chamber 212. A circulation hole 221 is also provided near the end of the jacket 2. The circulation hole 221 is interconnected with the first chamber 211 and the second chamber 212 respectively. The accommodating chamber 21 is divided into two chambers by the baffle 22, and the two chambers are interconnected by the circulation hole 221, so that when the extrusion 4 extrude the jacket 2 through the extrusion groove 31, the coolant in the jacket 2 can circulate in the two chambers through the circulation hole 221. First, the design of the circulation of the coolant can effectively take away the heat from the local hot spot and maintain the continuity of the cooling effect. When the extrusion 4 extrude the jacket 2 through the extrusion groove 31, the coolant can circulate between the first chamber 211 and the second chamber 212 through the circulation hole 221, thereby evenly dispersing the heat in the entire accommodating chamber 21. Secondly, through circulation, the coolant can achieve balanced flow between the first cavity 211 and the second cavity 212, thereby making the temperature distribution in the entire accommodating cavity 21 more uniform, avoiding overheating of a part of the accommodating cavity 21, further improving the heat dissipation effect and stability of the cable, and allowing the cable to maintain good temperature control under high load and extreme working conditions.

[0052] The extrusion member 4 includes a rotor, an elliptical disk 42 and a motor 41. The rotor is arranged on the housing 3 relative to the extrusion groove 31, and the sheath 2 is arranged along the circumference of the rotor. When the rotor rotates, the sheath 2 is intermittently squeezed through the extrusion groove 31, so that the coolant in the sheath 2 circulates in the first cavity 211, the second cavity 212 and the circulation hole 221. The elliptical disk 42 is arranged outside the rotor, and the center of the elliptical disk 42 coincides with the axis of the rotor. The long end of the elliptical disk 42 is used to squeeze the coolant in the sheath 2. As the elliptical disk 42 rotates, the long end of the elliptical disk 42 continuously squeezes the coolant in the sheath 2 to make it flow, thereby promoting the circulation of the coolant and evenly distributing it to improve the heat dissipation effect.

[0053] In addition, spherical protrusions 43 are also provided on both sides of the long end of the elliptical disk 42, and the spherical protrusions 43 press against the sheath 2. When the spherical protrusions 43 contact the sheath 2, the contact area can be reduced, thereby reducing the friction between the elliptical disk 42 and the sheath 2. Compared with the direct contact of the long end of the elliptical disk 42, the spherical protrusions 43 can reduce the friction resistance between the elliptical disk 42 and the sheath 2, reduce energy loss and wear on the sheath 2. In addition, the raised portion of the spherical protrusion 43 contacts the sheath 2 to form a gap, so that the contact portion of the spherical protrusion 43 and the sheath 2 is more easily squeezed, so that the coolant can flow better around the raised portion to improve the heat dissipation effect, thereby effectively reducing the temperature of the cable. In other embodiments, the spherical protrusion 43 can also be an elliptical protrusion or other arc-shaped protrusions.

[0054] The motor 41 is arranged on the housing 3, and the rotating shaft of the motor 41 is connected to the rotor, and the motor 41 is used to drive the rotor to rotate. The sheath 2 is arranged along the circumference of the rotor. When the motor 41 drives the rotor to rotate, the rotor squeezes the sheath 2 through the extrusion groove 31, thereby driving the coolant in the sheath 2 to circulate and take away the heat. Secondly, the rotating shaft of the motor 41 is connected to the rotor. Through the drive of the motor 41, the rotor can be controlled to rotate and squeeze the sheath 2 periodically, so that the coolant can circulate in the sheath 2.

[0055] A heat insulation layer is provided on the outer side of the shell 3 away from the extrusion groove 31. The heat insulation layer can effectively isolate the high temperature generated by automobile components such as the engine, reduce the heat conduction to the shell 3, and reduce the impact of temperature changes of high-temperature components on the cable.

[0056] The sheath 2 is made of high-temperature-resistant and low-friction PTFE, or polytetrafluoroethylene, with a compression modulus of 0.5 GPa-0.7 GPa. PTFE is a synthetic material with extremely special properties, with excellent corrosion resistance, high-temperature stability and low friction coefficient. In addition to its strong resistance to extreme temperatures, chemicals and radiation, PTFE also has excellent electrical insulation and anti-stick properties. It is widely used in aviation, new energy vehicles, biopharmaceuticals and other fields. By using high-temperature-resistant and low-friction PTFE, or polytetrafluoroethylene, it is easier to extrude the sheath 2 and reduce the friction consumption between the extruder and the sheath 2. In addition, it can also isolate some of the external heat from harming the cable core 1.

[0057] The implementation principle of Example 1 of the present application is:

[0058] First, local hot spots will be generated at the position where the cable is close to the high-temperature components in the car. For this reason, a receiving chamber 21 is set inside the sheath 2 and a coolant is placed. In order to further reduce the temperature of the local hot spot, the motor 41 is started, and the motor 41 drives the rotor and the elliptical disk 42 to rotate clockwise or counterclockwise. The spherical protrusions 43 on the rotor and the elliptical disk 42 will rotate and apply pressure to the coolant in the sheath 2, so that the coolant circulates in the first cavity 211 and the second cavity 212 in the sheath 2 following the rotation direction of the rotor. The circulation of the coolant is achieved through the extrusion design of the extrusion piece 4 and the extrusion groove 31. The flow of the coolant can take away the high heat of the local hot spot, thereby realizing the heat dissipation of the local hot spot of the cable, avoiding the local temperature of the cable from being too high, and improving the service life of the cable. Secondly, the coolant in the sheath 2 is equivalent to forming a buffer medium, so that the cable has a certain buffer function and protects the insulation layer 11 and the cable core 1 inside the cable from damage.

[0059] Example 2

[0060] It is substantially the same as the first embodiment, except for the avoidance notch 32 and the driving member 5 .

[0061] In this embodiment, the sheath 2 is slidably connected to the housing 3, and the driving member 5 is fixedly connected to the end of the sheath 2, and the driving member 5 is used to drive the sheath 2 to slide relative to the cable core 1. The driving member 5 drives the sheath 2 to slide relative to the cable core 1, and adjusts the position of the sheath 2 relative to the cable core 1, so that the sheath 2 is subjected to uniform pressure, avoiding frequent local squeezing, thereby reducing fatigue damage to the sheath 2.

[0062] However, since the circular protrusion is squeezing the sheath 2 at this time, it is not convenient to directly move the sheath 2. For this reason, a clearance notch 32 is also provided in the housing 3. When the long end of the elliptical disk 42 is close to the clearance notch 32, the spherical protrusion 43 is separated from the sheath 2. The clearance notch 32 enables the driving member 5 to easily move the sheath 2 to the desired position, avoiding frequent squeezing of the local area of ​​the sheath 2 by the spherical protrusion 43. When the spherical protrusion 43 moves to the clearance notch 32, the spherical protrusion 43 and the sheath 2 change from a squeezed state to a separated or abutted state, thereby reducing the friction resistance required to move the sheath 2, reducing the force applied by the driving member 5 on the sheath 2, improving the driving efficiency, and reducing the wear of the sheath 2.

[0063] The driving member 5 includes a telescopic rod 51 and a motor 52. The telescopic rod 51 is fixedly connected to the motor 52, which drives the movement of the telescopic rod 51, thereby facilitating the driving member 5 to drive the sheath 2 to move relative to the cable core 1. Through the action of the motor 52, precise control of the telescopic rod 51 can be achieved. The motor 52 provides a stable and adjustable thrust, so that the driving member 5 can accurately and reliably move the telescopic rod 51 to drive the sheath 2 to the desired position relative to the cable core 1. In addition, compared with other driving elements, the motor 52 is driven by electric energy, which is more suitable for new energy vehicles and has better energy utilization.

[0064] The implementation principle of Example 2 of the present application is:

[0065] The implementation principle is substantially the same as that of Example 1. When the sheath 2 is squeezed by the peristaltic pump, it bears the flow pressure load of the internal coolant. Long-term squeezing may cause the hose to be subjected to continuous load, thereby deforming the hose material. In addition, the sheath 2 is subjected to higher stress in the squeezing area, which will lead to the problem of stress concentration, and then cause fatigue damage or even breakage of the sheath 2. Therefore, in order to avoid the squeezing member 4 frequently squeezing the right semicircular sheath 2, the stress of the right sheath 2 is concentrated. A driving member 5 is provided, wherein the driving member 5 is fixedly connected to the end of the sheath 2, and the sheath 2 is driven to move relative to the cable core 1 by the movement of the driving telescopic rod 51 of the motor 52, so as to adjust the position of the sheath 2, avoid frequent squeezing of the local part, thereby reducing the fatigue damage of the sheath 2. Secondly, in order to facilitate the driving member 5 to move the sheath 2 to the desired position, a position avoidance notch 32 is provided on the housing 3. When the long end of the elliptical disk 42 is close to the position avoidance notch 32, the spherical protrusion 43 is separated from the sheath 2. In this way, the driving member 5 can more easily move the sheath 2 to the target position. The presence of the avoidance notch 32 reduces the force exerted by the driving member 5 on the sheath 2, reduces the friction resistance, improves the driving efficiency, and also reduces the wear of the sheath 2.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cable for new energy vehicles, characterized in that: include: A cable core (1), wherein the outer side of the cable core (1) is wrapped with an insulating layer (11); A sheath (2) is sleeved on the insulating layer (11), the sheath (2) is provided with a receiving cavity (21), and a cooling liquid is placed in the receiving cavity (21); A shell (3), the shell (3) being wrapped around the sheath (2), the shell (3) being provided with an extrusion groove (31); an extrusion piece (4), the extrusion piece (4) being capable of passing through the extrusion groove (31), the extrusion piece (4) being used to extrude the jacket (2) so that the coolant in the jacket (2) flows; The extruded part (4) comprises: A rotor, the rotor being arranged on the housing (3) relative to the extrusion groove (31), the sleeve (2) being arranged along the circumference of the rotor, and the sleeve (2) being intermittently extruded through the extrusion groove (31) when the rotor rotates, so that the coolant in the sleeve (2) circulates; An electric motor (41), wherein a rotating shaft of the electric motor (41) is connected to the rotor, and the electric motor (41) is used to drive the rotor to rotate; An elliptical disk (42) is arranged outside the rotor, the center of the elliptical disk (42) coincides with the axis of the rotor, and the long end of the elliptical disk (42) is used to squeeze the sheath (2).

2. A cable for new energy vehicles according to claim 1, characterized in that: A baffle (22) is further provided in the sheath (2); one side of the baffle (22) is fixedly connected to the inner wall of the sheath (2); the other side of the baffle (22) is fixedly connected to the insulating layer (11); the baffle (22) separates the accommodating cavity (21) into a first cavity (211) and a second cavity (212); a circulation hole (221) is further provided at an end of the baffle (22) close to the sheath (2); the circulation hole (221) is respectively connected to the first cavity (211) and the second cavity (212).

3. A cable for new energy vehicles according to claim 1, characterized in that: Spherical protrusions (43) are provided on both sides of the long end of the elliptical disk (42), and the spherical protrusions (43) are used to squeeze the sheath (2).

4. A cable for new energy vehicles according to claim 1, characterized in that: It also comprises a driving member (5), wherein the driving member (5) is fixedly connected to the end of the sheath (2), and the driving member (5) is used to drive the sheath (2) to be slidably connected relative to the cable core (1).

5. A cable for new energy vehicles according to claim 3, characterized in that: The shell (3) is also provided with a position-avoiding notch (32), and when the long end of the elliptical disk (42) approaches the position-avoiding notch (32), the spherical protrusion (43) is separated from the sheath (2).

6. A cable for new energy vehicles according to claim 4, characterized in that: The driving member (5) comprises: A telescopic rod (51), the telescopic rod (51) being fixedly connected to an end of the sheath (2); A motor (52), the motor (52) being fixedly connected to the telescopic rod (51), and the motor (52) being used to drive the telescopic rod (51) to move.

7. A cable for new energy vehicles according to claim 1, characterized in that: A heat insulation layer is provided on the outer side of the shell (3) away from the extrusion groove (31).

8. A cable for new energy vehicles according to claim 1, characterized in that: The sheath (2) is made of PTFE, and has a compression modulus of 0.5 GPa-0.7 GPa.

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