Silicone rubber insulated cable with nylon skeleton

Abstract

The invention provides a silicone rubber insulated cable with a nylon framework. The silicone rubber insulated cable with the nylon framework comprises a battery core assembly, an elastic supporting assembly and an insulating layer from inside to outside, at least three groups of battery cell assemblies are arranged and are positioned in the central area of the cable; the number of the elastic supporting assemblies is the same as that of the battery cell assemblies, each elastic supporting assembly comprises a plurality of left elastic supporting arms and a plurality of right elastic supporting arms, one ends of the left elastic supporting arms and the right elastic supporting arms are mutually connected, the other ends of the left elastic supporting arms and the right elastic supporting arms wrap the battery cell assemblies, and the tail ends of the left elastic supporting arms and the tail ends of the right elastic supporting arms are mutually staggered; the insulating layer and the battery core assembly are arranged at an interval and are supported in the insulating layer by a plurality of elastic supporting assemblies, and the tail ends of the left elastic supporting arm and the right elastic supporting arm are propped against the inner wall of the insulating layer. According to the technical scheme, a buffer space is provided between the battery cell assembly and the insulating layer through the elastic supporting assembly, so that the damage of external stress to the battery cell assembly is reduced.

Description

Technical Field

[0001] The invention generally relates to the field of cables, and in particular 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 technology, high-density battery packs have put forward higher requirements on the mechanical properties and reliability of cables. As the core component for energy transmission between battery cells, cables are subjected to complex stresses such as vibration, bending and external extrusion for a long time. Especially in a narrow space layout, cables are easily affected by adjacent structural parts or assembly processes, resulting in local stress concentration. Although traditional cable sheath materials have certain compressive resistance, under dynamic conditions, when stress is concentrated in a specific area, it may still exceed the load threshold of the battery cell casing, causing deformation of the battery cell casing, damage to the internal diaphragm and even short circuit risks, which seriously threatens the safety and service life of the battery system.

[0003] The current mainstream solutions to the cable stress problem in the industry include optimizing the cable routing path, adding a buffer layer, or using highly elastic sheath materials. For example, some designs disperse external pressure through a bellows structure or elastomer wrapping, but the attenuation effect on local extrusion stress is limited, especially near the contact point between the cable and the rigid component, which is prone to form a stress concentration area. In addition, although some flexible materials can alleviate instantaneous impact, they are prone to creep or aging under long-term cyclic loads, resulting in reduced protective performance. Existing technologies focus more on improving the strength of the cable body, but ignore the stress transfer mechanism of the cable-cell connection interface, and it is difficult to fundamentally block the conduction path of the extrusion stress to the cell body.

[0004] Therefore, the inventors believe that in the field of cables, the problem of excessive local stress in cables and damage caused by the stress being transmitted 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, the inner wall of the insulating layer is provided with a plurality of ridges at intervals around the circumferential direction of the insulating layer. Thus, when the outer side of the cable is squeezed, the deformation of the insulating layer will drive the ends of the left elastic support arm and the right elastic support arm to slide against the inner wall of the insulating layer, so that the left elastic support arm and the right elastic support arm accumulate elastic force through deformation, and the provision 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, so that the middle area of ​​the left elastic support arm and the right elastic support arm is deformed first, thereby providing a larger activity space for the peripheral side of the battery cell assembly, so that the battery cell assembly can reduce the impact on itself through its own activities.

[0009] In some embodiments, a plurality of buffer components are arranged between adjacent elastic support components, and the buffer components are composed of a plurality of arc-shaped elastic gussets, the opening direction of the elastic gussets is toward the insulating layer, and the outer arc surface of the elastic gussets abuts against the middle area of ​​adjacent elastic support components. Therefore, the arrangement of the elastic gussets can fill most of the gaps between the elastic support components on the one hand, ensuring the stability of the force inside the cable, and on the other hand, it also reduces the supporting pressure of the elastic support components, thereby improving the protection effect on the battery core.

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

[0011] In some embodiments, the elastic gusset plate is provided with vents spaced apart along its length direction, thereby facilitating the mutual flow of air and the transfer of heat, reducing the overall weight of the cable, and reducing obstacles to the bending of the cable.

[0012] In some embodiments, the battery cell assembly includes a central battery cell and a protective layer wrapped around the outside of the electrode.

[0013] In some embodiments, the insulating layer is coated with a sheath layer.

[0014] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended 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 A schematic cross-sectional view of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown; Figure 2A schematic cross-sectional structure diagram of a core assembly of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown; Figure 3 A schematic structural diagram of an elastic support assembly of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown; Figure 4 A schematic structural diagram of an elastic buckle plate of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown.

[0016] Explanation of symbols 1. Battery cell assembly; 11. Conductor; 12. Protective layer; 2. Elastic support assembly; 21. Support rod; 22. Left elastic support arm; 23. Right elastic support arm; 24. Connecting ring; 3. Insulation protection assembly; 31. Insulation layer; 32. Metal layer; 33. Sheath layer; 4. Raised ridge; 5. Elastic buckle plate; 51. Vent; 52. Transition piece. DETAILED DESCRIPTION

[0017] Hereinafter, preferred embodiments (or implementation modes) of the present invention will be described in detail with reference to the accompanying drawings.

[0018] Reference below Figure 1-Figure 4 A silicone rubber insulated cable with a nylon skeleton according to the present invention is described.

[0019] 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. Figure 1 As shown, a silicone rubber insulated cable with a nylon skeleton provided in this embodiment includes a battery core component 1, an elastic support component 2, and an insulating protection component 3 from the inside to the outside.

[0020] There are at least three battery cell assemblies 1 located in the middle area of ​​the cable, and the number of elastic support assemblies 2 is the same as the number of battery cell assemblies 1, and they are wrapped around the circumference of each battery cell assembly 1, thereby supporting the battery cell assembly 1 inside the insulating protection assembly 3 and spacing the insulating protection assembly 3 from multiple groups of battery cell assemblies 1.

[0021] Figure 2A schematic diagram of the cross-sectional structure of a battery core assembly 1 of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown. The battery core assembly 1 includes a plurality of conductors 11 in the middle, i.e., a battery core; and a protective layer 12 wrapped around the conductor 11. The protective layer 12 can be a plastic outer sheath or a rubber outer sheath. Plastic outer sheaths, such as polyethylene materials, are wear-resistant, weather-resistant, chemically resistant, and have excellent insulation properties, but are not flame retardant. The rubber outer sheath is resistant to high temperatures (silicone rubber can reach 180°C), weather-resistant, and aging-resistant, but the cost is relatively high. The outer sheaths of the above materials can all provide good protection for the conductor 11 in the middle.

[0022] Figure 3 The structure diagram of an elastic support assembly 2 of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown. Figure 3 As shown, the elastic support assembly 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 bar-shaped rod body, which can be made of metal or a composite material of metal and plastic to ensure that it has excellent support strength and also meets good bending performance. The left elastic support arm 22 and the right elastic support arm 23 have the same structure, both of which are arc-shaped elastic strip sheets. One end of the left elastic support rod 21 and the right elastic support rod 21 are 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 oppositely to meet the requirement that the battery cell assembly 1 is arranged therein, and the ends of the left elastic support arm 22 and the right elastic support arm 23 are arranged alternately and abut against the inner wall of the insulating protection assembly 3.

[0023] refer to Figure 1 As shown, the insulating protection component 3 includes a tubular insulating layer 31, a metal layer 32 coated on the outside of the insulating layer 31, and a sheath layer 33 coated on the outside of the metal layer 32. Among them, the insulating layer 31 can be a tube body made of cross-linked polyethylene, which is a thermosetting plastic, and has better tensile strength, wear resistance and tear resistance than ordinary polyethylene, and plays a good insulating role. The metal layer 32 is a copper belt or steel belt wrapped around the outside of the insulating layer 31. The 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, which has the effects of high temperature resistance (silicone rubber can reach 180°C), weather resistance, and aging resistance.

[0024] When the insulation protection component 3 of the cable is locally subjected to greater stress, the insulation protection component 3 will deform toward the inside of the cable, thereby driving the local left elastic support arm 22 and the right elastic support arm 23 to undergo elastic deformation to mitigate the stress impact caused by the insulation protection component 3, and the spacing 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 deformed under stress, the curvature of the left elastic support arm 22 and the right elastic support arm 23 will increase, indirectly expanding the activity space of the battery cell component 1. When the cable is subjected to greater stress instantly, the pressure of the external environment of the cable causes the elastic support component 2 to deform instantly, and the extra space around the battery cell component 1 caused by the deformation can also enable the battery cell component 1 to act as a buffer through movement, greatly improving the protection effect of the battery cell component 1 itself.

[0025] In some embodiments, the left elastic support arm 22 of each elastic support assembly 2 can be elastically inserted into the gap between adjacent right elastic support assemblies 2 of adjacent elastic support assemblies 2; and the right elastic support arm 23 of each elastic support assembly 2 can be elastically inserted into the gap between adjacent left elastic support assemblies 2 of adjacent elastic support assemblies 2. When the cable is partially squeezed by the external environment, it is possible that only the cable is partially deformed, so the above-mentioned structure greatly increases the elastic deformation space of the left elastic support arm 22 or the right elastic support arm 23, thereby improving the buffering effect.

[0026] refer to Figure 1 As shown, in some embodiments, when the external part of the cable is locally stressed, the insulating layer 31 is deformed, thereby causing 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, the inner wall of the insulating layer 31 is fixed with a ridge 4 along its length direction. There are multiple ridges 4 and they are arranged at intervals around the inner circumference of the insulating layer 31, so that when the ends of the left elastic support arm 22 and the right elastic support arm 23 abut and slide against the inner wall of the insulating layer 31, they are limited by the ridges 4, thereby causing the middle area of ​​the left elastic support arm 22 or the right elastic support arm 23 to deform preferentially, providing a larger activity space for the battery cell assembly 1.

[0027] Figure 4 The schematic diagram of the structure of an elastic gusset plate 5 of a silicone rubber insulated cable with a nylon skeleton according to an embodiment of the present invention is shown. Figure 1 and Figure 4As shown, in order to provide stable support between the electric core components 1 inside the cable, adjacent elastic support components 2 are further provided with buffer components, which are composed of a plurality of arc-shaped elastic gussets 5 and are arranged side by side along the length direction of the cable to reduce the influence on the bending of the cable. The outer arc surface of the elastic gusset 5 abuts against two adjacent elastic support components 2, and the open end of the elastic gusset 5 is curved toward the middle, thereby forming two transition pieces 52, and the transition piece 52 abuts against the inner wall of the insulating layer 31. When the cable is locally stressed, the insulating layer 31 is deformed by force, thereby driving the elastic support assembly 2 to elastically change, and the elastic gusset 5 is located between adjacent elastic support assemblies 2, and the bending deformation of the left elastic support arm 22 and the right elastic support arm 23 will cause compression on the elastic gusset 5, thereby driving the elastic gusset 5 to bend and deform toward the middle direction, which will not only not affect the elastic deformation of the elastic support assembly 2, but also provide good assistance to the left elastic support arm 22 and the right elastic support arm 23 through the mutual contact of the left elastic support arm 22 and the right elastic support arm 23, play the role of auxiliary support, and ensure the elastic force of the left elastic support arm 22 and the right elastic support arm 23. When the cable is stressed in the area where the elastic gusset 5 is located, the local deformation of the insulating layer 31 squeezes the elastic gusset 5, which will drive the transition pieces 52 at both ends of the elastic gusset 5 to open to both sides, and at this time, the elastic support assemblies 2 on both sides are supported on the back side of the elastic gusset 5, thereby playing the role of elastic support for the elastic gusset 5, and ensuring the support stability inside the cable.

[0028] In some embodiments, at least one vent 51 is provided in the middle region of the elastic buckle plate 5 to ensure air circulation in the spaces inside the cable, thereby improving the overall heat dissipation effect of the cable, and while reducing the overall weight of the cable, also increasing the bending deformation space of the cable.

[0029] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present 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), wherein 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), and the ends of the left elastic support arm (22) and the right elastic support arm (23) are mutually staggered; 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).

2. The silicone rubber insulated cable with nylon skeleton according to claim 1, characterized in that: The elastic support assembly (2) comprises a support rod (21), a plurality of connecting rings (24) sleeved on the support rod (21), and one end of the left elastic support arm (22) and one end of the right elastic support arm (23) are fixed to each other with one of the connecting rings (24).

3. The silicone rubber insulated cable with nylon skeleton according to claim 2, 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.

4. A silicone rubber insulated cable with a nylon skeleton according to claim 2 or 3, characterized in that: The inner wall of the insulating layer (31) is provided with a plurality of ridges (4) at intervals in a circumferential direction around the insulating layer (31).

5. A silicone rubber insulated cable with a nylon skeleton according to claim 4, 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).

6. A silicone rubber insulated cable with a nylon skeleton according to claim 5, 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).

7. A silicone rubber insulated cable with a nylon skeleton according to claim 6, characterized in that: The elastic buckle plate (5) is provided with ventilation holes (51) at intervals along its length direction.

8. 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).

9. 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).

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