A silicone rubber insulated cable with a nylon skeleton

Abstract

The present invention provides a silicone rubber insulated cable with a nylon skeleton, which from the inside to the outside of the cable respectively includes: a core component, an elastic support component, and an insulating layer; at least three groups of core components are provided and are located in the central area of the cable; the number of elastic support components is the same as that of the core components, and it includes a plurality of left elastic support arms and a plurality of right elastic support arms. One end of the left elastic support arm and the right elastic support arm are connected to each other, and the other end wraps the core component therein, and the ends of the left elastic support arm and the right elastic support arm are staggered with each other; the insulating layer is arranged at an interval from the core component and is supported by a plurality of elastic support components therein, and the ends of the left elastic support arm and the right elastic support arm abut against the inner wall of the insulating layer. By means of this technical solution, a buffer space is provided between the core component and the insulating layer by the elastic support component, thereby reducing the damage to the core component caused by external stress.

Description

Technical Field

[0001] The present invention generally relates to the field of cables, and more particularly to a silicone rubber insulated cable with a nylon skeleton. Background Art

[0002] With the rapid development of new energy electric vehicles and energy storage technologies, high-density battery packs have put forward higher requirements for the mechanical properties and reliability of cables. As the core component for energy transmission between battery cells, cables are subjected to complex stress actions such as vibration, bending, and external extrusion for a long time. Especially in a narrow space layout, cables are easily affected by adjacent structural components or assembly processes, resulting in local stress concentration. Although traditional cable sheath materials have certain compressive properties, under dynamic working conditions, when stress concentrates in a specific area, it may still exceed the load-bearing threshold of the battery cell housing, causing deformation of the battery cell housing, damage to the internal separator, and even short-circuit risks, seriously threatening the safety and service life of the battery system.

[0003] Currently, the mainstream solutions in the industry for cable stress problems include optimizing the cable routing path, adding a buffer layer, or using a highly elastic sheath material. For example, some designs use a corrugated pipe structure or an elastomer wrapping to disperse external pressure, but their attenuation effect on local extrusion stress is limited, and stress concentration areas are easily formed near the contact points between the cable and rigid components. In addition, although some flexible materials can relieve instantaneous impacts, they are prone to creep or aging under long-term cyclic loads, resulting in a decline in the protection performance. Existing technologies mostly focus on improving the strength of the cable itself, but ignore the stress transfer mechanism at the cable-battery cell connection interface, and it is difficult to fundamentally block the conduction path of extrusion stress to the battery cell body.

[0004] Therefore, the inventor believes that in the field of cables, the problem of excessive local stress in cables and the damage caused by stress transfer to the battery cells has not been effectively solved. Summary of the Invention

[0005] According to the present invention, in view of the problems existing in the above-mentioned prior art, a silicone rubber insulated cable with a nylon skeleton is provided, which comprises, from the inside to the outside of the cable, a battery cell assembly, an elastic support assembly, and an insulating layer; at least three groups of battery cell assemblies are provided, which are located in the central area of ​​the cable; the elastic support assembly is provided in the same number as the battery cell assembly, and comprises a plurality of left elastic support arms and a plurality of right elastic support arms, wherein one end of the left elastic support arm and the right elastic support arm are connected to each other, and the other end covers the battery cell assembly, and the ends of the left elastic support arm and the right elastic support arm are staggered with each other; the insulating layer is spaced apart from the battery cell assembly, and is supported therein by a plurality of elastic support assemblies, and the ends of the left elastic support arm and the right elastic support arm abut against the inner wall of the insulating layer. By having the above-mentioned technical features, the elastic support component plays a role in supporting and limiting the battery cell assembly internally, and plays a role in supporting and separating the insulation layer externally, thereby providing a buffer space between the insulation layer and the battery cell assembly. When the stress in a local area of ​​the cable is large, the force deformation of the insulation layer is difficult to be transmitted to the battery cell assembly in the middle, and if the cable is impacted by the external environment, the elastic support component can timely mitigate the impact on the battery cell assembly through elastic deformation.

[0006] In some embodiments, the elastic support assembly includes a support rod, a plurality of connection rings sleeved on the support rod, and one end of the left elastic support arm and the right elastic support arm are fixed to each other with one of the connection rings. Thus, the left elastic support arm and the right elastic support arm are connected to each other by the support rod, thereby limiting the protection of the battery cell assembly, and when under pressure, the space vacated by the elastic squeezing of the left elastic support arm and the right elastic support arm can also provide the battery cell assembly with a movable space to reduce the impact on itself.

[0007] In some embodiments, the gap between the adjacent left elastic support arms can accommodate the right elastic support arm of the adjacent elastic support assembly to pass through; the gap between the adjacent right elastic support arms can accommodate the left elastic support arm of the adjacent elastic support assembly to pass through. Therefore, when the cable is partially compressed, the left elastic support arm and the right elastic support arm are arranged to give way to each other, so as to provide the largest deformation space in the largest range, thereby increasing their own elastic force, thereby improving the protection effect on the battery cell assembly.

[0008] In some embodiments, a plurality of ridges are provided at intervals along the circumferential direction of the inner wall of the insulating layer. Thus, when the outside of the cable is squeezed, through the deformation of the insulating layer, the ends of the left elastic support arm and the right elastic support arm will be driven to slide relative to the inner wall of the insulating layer, so that the left elastic support arm and the right elastic support arm accumulate elastic acting forces through deformation. The arrangement of the ridges limits the sliding between the left elastic support arm, the right elastic support arm and the inner wall of the insulating layer, causing the middle regions of the left elastic support arm and the right elastic support arm to deform preferentially, thereby providing a relatively large activity space for the circumferential side of the battery cell assembly, so that the battery cell assembly can reduce the impact it receives through its own movement.

[0009] In some embodiments, a plurality of buffer components are provided between adjacent elastic support components. The buffer components are composed of a plurality of arc-shaped elastic buckles. The opening direction of the elastic buckle faces the insulating layer, and the outer arc surface of the elastic buckle abuts against the middle region of the adjacent elastic support component. Thus, on the one hand, the arrangement of the elastic buckles can fill most of the gaps between the elastic support components, ensuring the stable internal force of the cable, and on the other hand, it also reduces the support pressure of the elastic support components, thereby improving the protection effect on the battery cell.

[0010] In some embodiments, two edges of the elastic buckle are bent in an arc shape towards the middle of the elastic buckle to form a transition piece. Thus, the arrangement of the transition piece increases the contact area with the inner wall of the insulating layer and plays a good guiding role, further providing assistance for its own elastic deformation.

[0011] In some embodiments, ventilation openings are provided at intervals along the length direction of the elastic buckle. Thus, the arrangement of the ventilation openings helps the mutual flow of air and the transfer of heat, and can also reduce the overall weight of the cable and reduce the hindrance to the bending of the cable.

[0012] In some embodiments, the battery cell assembly includes a battery cell in the middle and a protective layer covering the outside of the electrode.

[0013] In some embodiments, a sheath layer is covered outside the insulating layer.

[0014] It should be understood that the content described in the Summary of the Invention section is not intended to limit the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Fig. shows a cross-sectional schematic view of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention;

[0016] Figure 2The cross-sectional structural schematic diagram of the core component of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown;

[0017] Figure 3 The structural schematic diagram of an elastic support component of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown;

[0018] Figure 4 The structural schematic diagram of an elastic buckle of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown.

[0019] Symbol description

[0020] 1. Core component; 11. Conductor; 12. Protective layer; 2. Elastic support component; 21. Support rod; 22. Left elastic support arm; 23. Right elastic support arm; 24. Connection ring; 3. Insulation protection component; 31. Insulation layer; 32. Metal layer; 33. Sheath layer; 4. Convex rib; 5. Elastic buckle; 51. Vent hole; 52. Transition piece. Specific embodiments

[0021] Next, the preferred embodiments (or implementation manners) of the present invention will be described in detail with reference to the accompanying drawings.

[0022] Next, refer to Figures 1 - 4 to describe a silicone rubber insulated cable with a nylon skeleton of the present invention.

[0023] Figure 1 The cross-sectional schematic diagram of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown. Refer to Figure 1 As shown, a silicone rubber insulated cable with a nylon skeleton provided in this embodiment sequentially includes a core component 1, an elastic support component 2, and an insulation protection component 3 from the inside to the outside.

[0024] At least three core components 1 are provided and are located in the middle area of the cable, and the number of elastic support components 2 is the same as the number of core components 1, and they are wrapped around the periphery of each core component 1, so as to support the core components 1 inside the insulation protection component 3 and make the insulation protection component 3 and multiple groups of core components 1 arranged at intervals.

[0025] Figure 2The cross-sectional structural schematic diagram of the core component 1 of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown. The core component 1 includes a multi-strand conductor 11 in the middle, that is, the core; and a protective layer 12 coated on the periphery of the conductor 11. The protective layer 12 can be an outer protective layer of plastic type or an outer protective layer of rubber type. The outer protective layer of plastic type, such as polyethylene material, has strong wear resistance, weather resistance, chemical corrosion resistance, and excellent insulation performance, but has no flame retardancy. While the outer protective layer of rubber type has high temperature resistance (silicone rubber can reach 180 °C), weather resistance, and anti-aging properties, but has a higher cost. The outer protective layers of the above materials can all play a good protective role for the conductor 11 in the middle.

[0026] Figure 3 The structural schematic diagram of an elastic support component 2 of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown. Refer to Figure 3 As shown, the elastic support component 2 includes a support rod 21, a left elastic support arm 22, and a right elastic support arm 23. The support rod 21 is a strip-shaped rod body, which can be made of metal material or a composite material of metal and plastic to ensure excellent support strength and meet good bending performance. The left elastic support arm 22 and the right elastic support arm 23 have the same structure and are both arc-shaped elastic strip-shaped sheets. One end of the left elastic support rod 21 and the right elastic support rod 21 are both fixedly connected with a connecting ring 24, and the connecting ring 24 is sleeved on the support rod 21 to realize the rotational connection between the left elastic support arm 22, the right elastic support arm 23 and the support rod 21. The left elastic support arm 22 and the right elastic support arm 23 are arranged alternately in sequence, and the inner arc sides of the left elastic support arm 22 and the right elastic support arm 23 are arranged opposite to each other to accommodate the core component 1 therein, and the ends of the left elastic support arm 22 and the right elastic support arm 23 are arranged alternately and abutted against the inner wall of the insulation protection component 3.

[0027] Refer to Figure 1 As shown, the insulation protection component 3 includes a tubular insulation layer 31, a metal layer 32 coated on the outside of the insulation layer 31, and a sheath layer 33 coated on the outside of the metal layer 32. Among them, the insulation layer 31 can be a pipe body made of cross-linked polyethylene material, which belongs to thermosetting plastic and has better tensile strength, wear resistance and tear resistance than ordinary polyethylene, playing a good insulation role. The metal layer 32 is a copper strip or a steel strip wound around the outside of the insulation layer 31, and its winding connection method makes the overall bending performance of the cable stronger, and can also protect against electromagnetic interference and mechanical damage, thereby improving the overall mechanical strength of the cable. The sheath layer 33 is made of silicone rubber material and has the functions of high temperature resistance (silicone rubber can reach 180 °C), weather resistance, and anti-aging.

[0028] When the insulation protection component 3 of the cable is locally subjected to a large stress, it will cause the insulation protection component 3 to deform towards the inside of the cable, thereby driving the local left elastic support arm 22 and right elastic support arm 23 to undergo elastic deformation to slow down the stress impact brought by the insulation protection component 3, and the spaced space between the battery cell component 1 and the insulation protection component 3 also provides a stress deformation space for the elastic support component 2. Moreover, when the left elastic support arm 22 and the right elastic support arm 23 are stressed and deformed, it will cause the arcs of the left elastic support arm 22 and the right elastic support arm 23 to increase, indirectly expanding the movement space of the battery cell component 1. When the cable is instantaneously subjected to a large stress, the compression of the external environment of the cable causes the instantaneous deformation of the elastic support component 2, and the extra space on the peripheral side of the battery cell component 1 generated by the deformation can also enable the battery cell component 1 to move to play a buffering role, greatly improving the protection effect on the battery cell component 1 itself.

[0029] In some embodiments, the left elastic support arm 22 of each elastic support component 2 can elastically penetrate into the gap between adjacent right elastic support components 2 of the adjacent elastic support component 2; and the right elastic support arm 23 of each elastic support component 2 can elastically penetrate into the gap between adjacent left elastic support components 2 of the adjacent elastic support component 2. When the cable is locally squeezed by the external environment, it may only cause local deformation of the cable. Therefore, the above structure setting will greatly increase the elastic deformation space of the left elastic support arm 22 or the right elastic support arm 23, thereby improving the buffering effect.

[0030] Reference Figure 1 As shown, in some embodiments, when the outside of the cable is locally stressed, it drives the insulation layer 31 to deform, thereby driving the ends of the left elastic support arm 22 and the right elastic support arm 23 to deform. In order to increase the deformation space of the left elastic support arm 22 and the right elastic support arm 23, convex ribs 4 are fixed along the length direction of the inner wall of the insulation layer 31. There are multiple convex ribs 4 and they are arranged at intervals around the inner circumferential surface of the insulation layer 31, so that when the ends of the left elastic support arm 22 and the right elastic support arm 23 abut and slide on the inner wall of the insulation layer 31, they are limited by the convex ribs 4, thereby driving the middle regions of the left elastic support arm 22 or the right elastic support arm 23 to deform preferentially, providing a larger movement space for the battery cell component 1.

[0031] Figure 4 The structural schematic diagram of an elastic buckle plate 5 of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown. Reference Figure 1 And Figure 4As shown in the figure, in order to satisfy the stable support between the internal battery cell components 1 of the cable, a buffer component is further provided between adjacent elastic support components 2. The buffer component is composed of a plurality of arc-shaped elastic buckle plates 5 and is arranged adjacent to each other along the length direction of the cable to reduce the influence on the bending of the cable. The outer arc surface of the elastic buckle plate 5 abuts against two adjacent elastic support components 2, and the open end of the elastic buckle plate 5 is arcuately bent towards the middle thereof, thereby forming two transition pieces 52, and the transition pieces 52 abut against the inner wall of the insulating layer 31. When local stress is applied to the outside of the cable, the insulating layer 31 is deformed by the force, thereby driving the elastic deformation of the elastic support component 2. Since the elastic buckle plate 5 is located between adjacent elastic support components 2, the bending deformation of the left elastic support arm 22 and the right elastic support arm 23 will squeeze the elastic buckle plate 5, thereby driving the elastic buckle plate 5 to be bent and deformed towards the middle. This not only does not affect the elastic deformation of the elastic support component 2, but also provides a good boost to the left elastic support arm 22 and the right elastic support arm 23 through the mutual abutment of the left elastic support arm 22 and the right elastic support arm 23, playing an auxiliary support role and ensuring the elastic acting force of the left elastic support arm 22 and the right elastic support arm 23. When stress is applied to the outside of the cable in the area where the elastic buckle plate 5 is located, the local deformation of the insulating layer 31 presses against the elastic buckle plate 5, which will drive the transition pieces 52 at both ends of the elastic buckle plate 5 to open to both sides. At this time, the elastic support components 2 on both sides support the back side of the elastic buckle plate 5, thereby playing an elastic support role for the elastic buckle plate 5 and ensuring the support stability inside the cable.

[0032] In some embodiments, at least one ventilation opening 51 is provided in the middle area of the elastic buckle plate 5 to ensure the air circulation in each space inside the cable, thereby improving the overall heat dissipation effect of the cable. Moreover, while reducing the overall weight of the cable, it also increases the deformation space for the bending of the cable.

[0033] In the description of this specification, terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application should be included in the protection scope of this application.

Claims

1. A silicone rubber insulated cable with a nylon skeleton, characterized in that: The cable comprises, from the inside to the outside, a battery core assembly (1), an elastic support assembly (2), and an insulating layer (31); At least three groups of battery cell assemblies (1) are provided and located in the central area of ​​the cable; The elastic support assembly (2) is provided in the same number as the battery cell assembly (1), and comprises a plurality of left elastic support arms (22) and a plurality of right elastic support arms (23); one end of the left elastic support arm (22) and the right elastic support arm (23) are mutually connected, and the other end covers the battery cell assembly (1); the ends of the left elastic support arm (22) and the right elastic support arm (23) are mutually staggered; the elastic support assembly (2) comprises a support rod (21), a plurality of connecting rings (24) sleeved on the support rod (21); one end of the left elastic support arm (22) and the right elastic support arm (23) are mutually fixed to one of the connecting rings (24); The insulating layer (31) is spaced apart from the battery cell assembly (1) and supported therein by a plurality of elastic support assemblies (2); the ends of the left elastic support arm (22) and the right elastic support arm (23) abut against the inner wall of the insulating layer (31); and the inner wall of the insulating layer (31) is spaced apart with a plurality of ridges (4) in a circumferential direction around the insulating layer (31).

2. The silicone rubber insulated cable with nylon skeleton according to claim 1, characterized in that: The gap between adjacent left elastic support arms (22) can accommodate the right elastic support arm (23) of the adjacent elastic support assembly (2) to pass through; the gap between adjacent right elastic support arms (23) can accommodate the left elastic support arm (22) of the adjacent elastic support assembly (2) to pass through.

3. A silicone rubber insulated cable with a nylon skeleton according to claim 2, characterized in that: A plurality of buffer components are arranged between adjacent elastic support components (2), and the buffer components are composed of a plurality of arc-shaped elastic buckle plates (5), the opening direction of the elastic buckle plates (5) is toward the insulating layer (31), and the outer arc surface of the elastic buckle plates (5) abuts against the middle area of ​​the adjacent elastic support components (2).

4. A silicone rubber insulated cable with a nylon skeleton according to claim 3, characterized in that: The two edges of the elastic buckle plate (5) are bent in an arc shape toward the middle of the elastic buckle plate (5) to form a transition piece (52).

5. A silicone rubber insulated cable with a nylon skeleton according to claim 4, characterized in that: The elastic buckle plate (5) is provided with ventilation holes (51) at intervals along its length direction.

6. The silicone rubber insulated cable with nylon skeleton according to claim 1, characterized in that: The battery core assembly (1) comprises a conductor (11) in the middle, and a protective layer (12) covering the outside of the conductor (11).

7. The silicone rubber insulated cable with nylon skeleton according to claim 1, characterized in that: The insulating layer (31) is externally coated with a sheath layer (33).

Images