Fireproof heat insulation line structure and high-voltage fast charging gun

Abstract

The utility model provides a fireproof heat insulation line structure and a high-voltage fast charging gun, the fireproof heat insulation line structure comprises a cable, a fireproof heat insulation layer and a flame-retardant protective sleeve from inside to outside in sequence, and the fireproof heat insulation line structure further comprises a heat collection layer and a heat conduction cooling layer; the heat collection layer is arranged between the cable and the fireproof heat insulation layer, the heat conduction cooling layer is arranged between the heat collection layer and the fireproof heat insulation layer, the additionally arranged heat collection layer can rapidly transmit heat generated in the cable to the heat conduction cooling layer, and then the heat conduction cooling layer rapidly conducts the heat to the outside. Therefore, the interior of the cable can be rapidly cooled, the phenomenon that the interior of the cable is easily overheated in the high-voltage rapid charging process is effectively avoided, the probability that the cable explodes in the high-voltage rapid charging process is greatly reduced, and the fireproof heat-insulating layer and the flame-retardant protective sleeve can keep the cable structure complete under the condition of high temperature or fire disaster, so that the cable is convenient to use. Fire spreading is effectively prevented, and damage of high temperature or fire to the cable is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of high-voltage fast charging fire prevention technology, and in particular to a fireproof and heat-insulating circuit structure and a high-voltage fast charging gun. Background Art

[0002] High-voltage fast charging for energy storage batteries is ushering in a new phase of development for the new energy vehicle industry. Its emergence not only significantly improves charging efficiency but also largely addresses the pain points of new energy vehicles, such as long charging times and insufficient charging facilities.

[0003] In high-voltage fast charging technology, how to ensure the safety and stability of the battery charging process while ensuring the charging speed. As Chinese patent document CN 113674913 B discloses a heat-insulating fireproof cable and its preparation method, combined with Figure 1 It can be seen that the heat-insulating fireproof cable is provided with a cable core, an anti-corrosion layer, a reinforced winding layer, an inner insulation layer and an outer insulation layer from the inside to the outside. A number of heat dissipation holes are opened in the composite insulation layer of the outer insulation layer, thereby providing a good heat dissipation environment for the cable core. Moreover, when a fire occurs externally, the thermal expansion and contraction of the temperature-sensing reaction ball will cause the composite insulation strip to move toward the heat dissipation hole through deformation to seal the heat dissipation hole, thereby protecting the cable core.

[0004] However, during high-voltage fast charging, the cable core is prone to overload, causing a large amount of heat to accumulate inside the cable core. The traditional reinforced winding layer and inner insulation layer usually have an insulation effect and cannot transfer the heat inside the cable core to the outside quickly, resulting in the cable core being prone to overheating during high-voltage fast charging, and in severe cases, it may cause explosion. Utility Model Content

[0005] The purpose of the present disclosure is to overcome the shortcomings of the existing technology and provide a fire-proof and heat-insulating circuit structure and a high-voltage fast charging gun that can quickly dissipate the heat generated inside the cable and achieve rapid cooling of the inside of the cable.

[0006] The purpose of this disclosure is achieved through the following technical solutions:

[0007] A fireproof and heat-insulating circuit structure, which comprises a cable, a fireproof and heat-insulating layer and a flame-retardant protective cover from the inside to the outside.

[0008] The fireproof and heat-insulating circuit structure further includes a heat-collecting layer and a heat-conducting cooling layer;

[0009] The heat collection layer is arranged between the cable and the fireproof heat insulation layer, and the heat conduction cooling layer is arranged between the heat collection layer and the fireproof heat insulation layer.

[0010] In one embodiment, the heat collection layer is a metal heat collection layer.

[0011] In one embodiment, the heat-conducting cooling layer includes a capillary heat-conducting tube, which is arranged around the outer peripheral wall of the heat-collecting layer, and one end of the capillary heat-conducting tube is a liquid outlet, and the other end of the capillary heat-conducting tube is a liquid inlet.

[0012] In one embodiment, the heat-conducting cooling layer includes a plurality of capillary heat-conducting tubes, each of which is arranged around the outer peripheral wall of the heat collection layer; the capillary heat-conducting tube includes a first capillary heat-conducting sub-tube and a second capillary heat-conducting sub-tube that are connected to each other, and a liquid inlet is formed at the starting end of the first capillary heat-conducting sub-tube, and a liquid outlet is formed at the end of the second capillary heat-conducting sub-tube.

[0013] In one embodiment, the capillary heat pipe is fixed to the outer peripheral wall of the heat collection layer through an adhesive layer.

[0014] In one embodiment, the fireproof and heat-insulating circuit structure further includes a high-temperature resistant woven fabric layer, and the high-temperature resistant woven fabric layer is arranged between the cable and the heat collection layer.

[0015] In one embodiment, the high temperature resistant woven fabric layer includes one of a high temperature resistant glass fiber layer, a high temperature resistant silicone cloth layer, and a high temperature resistant fiber cloth layer.

[0016] In one embodiment, the fireproof heat-insulating layer is a fireproof tape, and the fireproof tape is used to wrap the heat-conducting cooling layer around the outer peripheral wall of the heat-collecting layer.

[0017] In one embodiment, the flame retardant protective cover is a wear-resistant flame retardant protective cover.

[0018] A high-voltage fast charging gun includes the fireproof and heat-insulating circuit structure described in any of the above embodiments.

[0019] Compared with the prior art, the present disclosure has at least the following advantages:

[0020] 1) Since the heat collection layer is arranged between the cable and the fireproof insulation layer, and the heat conductive cooling layer is arranged between the heat collection layer and the fireproof insulation layer, the added heat collection layer can quickly transfer the heat generated inside the cable to the heat conductive cooling layer, and then the heat conductive cooling layer quickly conducts the heat to the outside, thereby achieving a faster cooling effect on the inside of the cable, effectively avoiding the phenomenon of overheating inside the cable during high-voltage fast charging, and greatly reducing the probability of the cable exploding during high-voltage fast charging.

[0021] 2) Since the fireproof and heat-insulating line structure includes cables, fireproof and heat-insulating layers and flame-retardant protective sleeves from the inside to the outside, the fireproof and heat-insulating layers and flame-retardant protective sleeves can keep the cable structure intact under high temperature or fire conditions, effectively preventing the spread of fire and reducing damage to the cables caused by high temperature or fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic structural diagram of a fireproof and heat-insulating circuit structure in one direction according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A structural schematic diagram of a fireproof and heat-insulating circuit structure in one direction is shown;

[0025] Figure 3 for Figure 2 A cross-sectional view of a fireproof and heat-insulating circuit structure in one direction is shown.

[0026] Figure numerals: 10, fireproof and heat-insulating circuit structure; 100, cable; 200, fireproof and heat-insulating layer; 300, flame-retardant protective cover; 310, opening; 400, heat-collecting layer; 500, heat-conducting cooling layer; 510, capillary heat-conducting tube; 511, first capillary heat-conducting sub-tube; 5111, liquid inlet; 512, second capillary heat-conducting sub-tube; 5121, liquid outlet; 520, coolant; 600, high-temperature resistant fabric layer. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below with reference to specific embodiments:

[0031] Please refer to 1 to Figure 3 In one embodiment, the fireproof and heat-insulating circuit structure 10 comprises, from the inside to the outside, a cable 100, a fireproof and heat-insulating layer 200, and a flame-retardant protective cover 300. The fireproof and heat-insulating circuit structure 10 further comprises a heat-collecting layer 400 and a heat-conducting cooling layer 500. The heat-collecting layer 400 is arranged between the cable 100 and the fireproof and heat-insulating layer 200, and the heat-conducting cooling layer 500 is arranged between the heat-collecting layer 400 and the fireproof and heat-insulating layer 200.

[0032] It can be understood that since the fireproof and heat-insulating circuit structure 10 has the cable 100, the fireproof and heat-insulating layer 200 and the flame-retardant protective cover 300 from the inside to the outside, the fireproof and heat-insulating layer 200 and the flame-retardant protective cover 300 can keep the cable 100 structural integrity under high temperature or fire conditions, effectively prevent the spread of fire, and reduce the damage to the cable 100 caused by high temperature or fire. Since the heat collection layer 400 is arranged between the cable 100 and the fireproof insulation layer 200, and the heat conductive cooling layer 500 is arranged between the heat collection layer 400 and the fireproof insulation layer 200, the added heat collection layer 400 can quickly transfer the heat generated inside the cable 100 to the heat conductive cooling layer 500, and then the heat conductive cooling layer 500 quickly conducts the heat to the outside, thereby achieving a faster cooling effect on the inside of the cable 100, effectively avoiding the phenomenon of overheating inside the cable 100 during high-voltage fast charging, and greatly reducing the probability of the cable 100 exploding during high-voltage fast charging.

[0033] In one embodiment, the heat-collecting layer 400 is a metal heat-collecting layer 400, so that the metal heat-collecting layer 400 can quickly absorb a large amount of heat generated inside the cable 100. In some preferred embodiments, the metal heat-collecting layer 400 can be a copper heat-collecting layer 400 or an aluminum heat-collecting layer 400 to ensure that the metal heat-collecting layer 400 can quickly absorb heat inside the cable 100.

[0034] In one embodiment, the heat-conducting cooling layer includes a capillary heat pipe, which is arranged around the outer wall of the heat collection layer, and one end of the capillary heat pipe is a liquid outlet 5121, and the other end of the capillary heat pipe is a liquid inlet. The liquid inlet and liquid outlet 5121 of the capillary heat pipe are respectively connected to an external cooling box, so that the coolant of the cooling box can enter from the liquid inlet of the capillary heat pipe and flow out from the liquid outlet 5121 of the capillary heat pipe. The coolant in the capillary heat pipe can absorb the heat of the metal heat collection layer, so that the coolant in the capillary heat pipe quickly brings the heat of the metal heat collection layer out to the external cooling box, and the cooling box will cool the heated coolant and finally circulate it back into the capillary heat pipe. In this way, continuous circulation can achieve a faster cooling effect on the inside of the cable. Specifically, the capillary heat pipe is distributed in an S shape on the outer wall of the heat collection layer.

[0035] Of course, the heat-conducting cooling layer 500 can also be other structures to achieve faster cooling of the inside of the cable 100, such as Figure 2 or Figure 3 As shown, in other embodiments, the heat-conducting cooling layer 500 includes a plurality of capillary heat-conducting tubes 510, each of which is arranged around the outer peripheral wall of the heat-collecting layer 400; the capillary heat-conducting tube 510 includes a first capillary heat-conducting sub-tube 511 and a second capillary heat-conducting sub-tube 512 connected to each other, the starting end of the first capillary heat-conducting sub-tube 511 is formed with a liquid inlet 5111, and the end of the second capillary heat-conducting sub-tube 512 is formed with a liquid outlet 5121, and the liquid inlet 5111 and the liquid outlet 5121 are respectively It is connected to an external cooling box so that the cooling liquid 520 of the cooling box can enter from the liquid inlet of the first capillary heat conducting sub-tube 511 and flow out from the liquid outlet 5121 of the second capillary heat conducting sub-tube 512, so that the cooling liquid 520 can absorb the heat of the metal heat collecting layer 400 and bring it out to the external cooling box. The cooling box will cool the heated cooling liquid 520 and finally circulate it back into the first capillary heat conducting sub-tube 511. This cycle is continuously repeated to achieve a faster cooling effect on the inside of the cable 100.

[0036] In one embodiment, the first capillary heat conducting sub-tube 511 and the second capillary heat conducting sub-tube 512 are respectively arranged tangent to the outer peripheral wall of the heat collecting layer 400 to ensure that there is no gap between the first capillary heat conducting sub-tube 511 and the second capillary heat conducting sub-tube 512, to ensure that the first capillary heat conducting sub-tube 511 and the second capillary heat conducting sub-tube 512 can cover the outer peripheral wall of the heat collecting layer 400 to the greatest extent, further improving the rapid heat extraction and cooling of the heat collecting layer 400 by the heat conductive cooling layer 500.

[0037] In one embodiment, the capillary heat pipe 510 is fixed to the outer peripheral wall of the heat collection layer 400 through an adhesive layer to achieve the connection and fixation between the capillary heat pipe 510 and the heat collection layer 400, that is, a first adhesive layer is formed between the capillary heat pipe 510 and the heat collection layer 400.

[0038] like Figure 2 or Figure 3 As shown, in one embodiment, the fireproof and heat-insulating circuit structure 10 further includes a high-temperature resistant woven fabric layer 600, which is disposed between the cable 100 and the heat-collecting layer 400. It will be appreciated that, because the high-temperature resistant woven fabric layer 600 has a certain porosity, high-temperature resistance, and insulation properties, heat within the cable 100 can quickly enter the high-temperature resistant woven fabric layer 600, and then enter the heat-collecting layer 400 from the high-temperature resistant woven fabric layer 600. This also ensures that the high-temperature resistant woven fabric layer 600 is not easily deformed or broken at high temperatures.

[0039] In one embodiment, the high temperature resistant fabric layer 600 includes one of a high temperature resistant glass fiber layer, a high temperature resistant silicone fabric layer, and a high temperature resistant fiber fabric layer to ensure that the high temperature resistant fabric layer 600 has a certain porosity, high temperature resistance, and insulation performance.

[0040] It is understandable that if the thermal conductive cooling layer 500 is fixed to the heat collection layer 400 only by an adhesive layer, when the operator assembles the thermal conductive cooling layer 500 into the wear-resistant and flame-retardant protective sleeve 300, the thermal conductive cooling layer 500 is easily rubbed against the wear-resistant and flame-retardant protective sleeve 300, causing some of the capillary heat conductive tubes 510 of the thermal conductive cooling layer 500 to easily fall off. Therefore, in one embodiment, the fireproof and heat-insulating layer 200 is a fireproof tape, which is used to wrap the thermal conductive cooling layer 500 around the outer wall of the heat collection layer 400. The additional fireproof tape can wrap and fix the capillary heat conductive tubes 510, further improving the firmness of the connection between the capillary heat conductive tubes 510 and the heat collection layer 400, and avoiding the phenomenon that some of the capillary heat conductive tubes 510 are easily fallen off during the assembly process. In addition, the additional fireproof tape can also effectively prevent the spread of fire and reduce the damage to the cable 100 caused by high temperature or fire.

[0041] In one embodiment, a second adhesive layer is formed on the side of the fireproof tape facing the capillary heat pipe 510 to effectively fix the multiple capillary heat pipes 510 .

[0042] In one embodiment, the flame retardant protective cover 300 is a wear-resistant flame retardant protective cover 300 to ensure that the wear-resistant flame retardant protective cover 300 can provide good wear resistance, flame retardancy, fire prevention and protection for the cable 100 .

[0043] like Figure 1or Figure 2 As shown, in one embodiment, a cavity is formed in the flame retardant protective cover 300, and the cavity has an opening 310. The cable 100, the high temperature resistant woven fabric layer 600, the metal heat collection layer 400, the heat conductive cooling layer 500, and the fireproof tape are placed in the cavity from the inside to the outside. In this way, the metal heat collection layer 400 and the heat conductive cooling layer 500 located in the cavity can quickly conduct the heat in the cable 100 to the outside, so as to achieve faster cooling of the inside of the cable 100.

[0044] The present disclosure also provides a high-voltage fast charging gun, including the fireproof and heat-insulating circuit structure 10 described in any of the above embodiments. It can be understood that the high-voltage fast charging gun includes a charging body, the charging body is formed with a wire groove, and the fireproof and heat-insulating circuit structure 10 is glued and fixed in the wire groove. In this way, the fireproof and heat-insulating circuit structure 10 can be bonded and fixed to the wire groove. When the high-voltage fast charging gun is working, the metal heat collection layer 400 can quickly collect the heat in the cable 100 and transfer it to the heat-conducting cooling layer 500, and the coolant 520 in the capillary heat-conducting tube in the heat-conducting cooling layer 500 can absorb the heat of the metal heat collection layer 400 and quickly take the heat of the metal heat collection layer 400 out to the cooling box through the coolant 520 in the capillary heat-conducting tube. The cooling box will cool the heated coolant 520 and finally circulate it back into the capillary heat-conducting tube. In this way, the high-voltage fast charging gun is continuously circulated to dissipate heat during high-voltage fast charging, effectively avoiding the problem of excessive heat accumulation in the high-voltage fast charging gun during high-voltage fast charging.

[0045] In one embodiment, the cooling liquid 520 can be liquid water, liquid ethylene glycol, etc., so as to flow in the capillary heat pipe to ensure rapid cooling of the metal heat collection layer 400.

[0046] In one embodiment, the cable 100 includes a plurality of wires.

[0047] Compared with the existing technology, the present disclosure has at least the following advantages:

[0048] 1) Since the heat collection layer 400 is arranged between the cable 100 and the fireproof insulation layer 200, and the heat conductive cooling layer 500 is arranged between the heat collection layer 400 and the fireproof insulation layer 200, the added heat collection layer 400 can quickly transfer the heat generated inside the cable 100 to the heat conductive cooling layer 500, and then the heat conductive cooling layer 500 quickly conducts the heat to the outside, thereby achieving a faster cooling effect on the inside of the cable 100, effectively avoiding the phenomenon of overheating inside the cable 100 during high-voltage fast charging, and greatly reducing the probability of the cable 100 exploding during high-voltage fast charging.

[0049] 2) Since the fireproof and heat-insulating circuit structure 10 comprises the cable 100, the fireproof and heat-insulating layer 200 and the flame-retardant protective cover 300 from the inside to the outside, the fireproof and heat-insulating layer 200 and the flame-retardant protective cover 300 can keep the cable 100 structurally intact under high temperature or fire conditions, effectively preventing the spread of fire and reducing damage to the cable 100 caused by high temperature or fire.

[0050] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. A fireproof and heat-insulating circuit structure, which comprises a cable, a fireproof and heat-insulating layer, and a flame-retardant protective cover from the inside out, characterized in that: The fireproof and heat-insulating circuit structure further includes a heat-collecting layer and a heat-conducting cooling layer; wherein the heat-collecting layer is a copper heat-collecting layer or an aluminum heat-collecting layer; The heat collection layer is arranged between the cable and the fireproof heat insulation layer, and the heat conduction cooling layer is arranged between the heat collection layer and the fireproof heat insulation layer; The heat-conducting cooling layer includes a plurality of capillary heat-conducting tubes, each of which is disposed around the outer peripheral wall of the heat-collecting layer; the capillary heat-conducting tubes include a first capillary heat-conducting sub-tube and a second capillary heat-conducting sub-tube that are connected to each other; a liquid inlet is formed at the starting end of the first capillary heat-conducting sub-tube, and a liquid outlet is formed at the end of the second capillary heat-conducting sub-tube; the liquid inlet and the liquid outlet are used to communicate with an external cooling box; The capillary heat conducting tube is fixed to the outer peripheral wall of the heat collecting layer through an adhesive layer; The fireproof heat-insulating layer is a fireproof tape, and the fireproof tape is used to wrap the heat-conducting cooling layer around the outer peripheral wall of the metal heat-collecting layer.

2. The fireproof and heat-insulating circuit structure according to claim 1, characterized in that: The fireproof and heat-insulating circuit structure further includes a high-temperature resistant woven fabric layer, which is arranged between the cable and the heat collection layer.

3. The fireproof and heat-insulating circuit structure according to claim 1, characterized in that: The high temperature resistant woven fabric layer includes one of a high temperature resistant glass fiber layer, a high temperature resistant silicone cloth layer, and a high temperature resistant fiber cloth layer.

4. The fireproof and heat-insulating circuit structure according to claim 1, characterized in that: The flame retardant protective cover is a wear-resistant flame retardant protective cover.

5. A high-voltage fast charging gun, characterized in that: The invention comprises the fireproof and heat-insulating circuit structure according to any one of claims 1 to 4.

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