CN110901400A - Collector shoe carbon sliding plate, preparation method thereof and electric vehicle - Google Patents

Collector shoe carbon sliding plate, preparation method thereof and electric vehicle Download PDF

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Publication number
CN110901400A
CN110901400A CN201811087106.4A CN201811087106A CN110901400A CN 110901400 A CN110901400 A CN 110901400A CN 201811087106 A CN201811087106 A CN 201811087106A CN 110901400 A CN110901400 A CN 110901400A
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China
Prior art keywords
metal layer
conductive metal
carbon
glue
sliding plate
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CN201811087106.4A
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Chinese (zh)
Inventor
郭少聪
吴波
邓小霞
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BYD Co Ltd
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BYD Co Ltd
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Priority to CN201811087106.4A priority Critical patent/CN110901400A/en
Publication of CN110901400A publication Critical patent/CN110901400A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B60L5/20—Details of contact bow
    • B60L5/205—Details of contact bow with carbon contact members
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
    • C09J163/04—Epoxynovolacs

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

本发明涉及集电靴碳滑板领域，具体涉及集电靴碳滑板及其制备方法和电力车。该集电靴碳滑板包括金属支架，位于金属支架表面并与金属支架一体的导电金属层，以及位于导电金属层表面的碳滑板；所述导电金属层具有孔隙，所述导电金属层的孔隙中填充有粘接胶，所述碳滑板通过导电金属层和粘接胶与所述金属支架连接。本发明避免了现有技术将金属粉混合在粘结胶中所导致的金属粉容易发生团聚，不易均匀分散在粘结胶中的缺陷。此外，碳滑板和金属支架的连接更为牢固，电阻更均匀，更小，同时所得产品的连接强度更高。本发明的粘接工艺简单。The invention relates to the field of a collector shoe carbon skateboard, in particular to a collector shoe carbon skateboard, a preparation method thereof, and an electric vehicle. The collector shoe carbon sliding plate includes a metal support, a conductive metal layer located on the surface of the metal support and integrated with the metal support, and a carbon sliding plate located on the surface of the conductive metal layer; the conductive metal layer has pores, and the pores of the conductive metal layer are in the conductive metal layer. Filled with adhesive glue, the carbon sliding plate is connected with the metal bracket through the conductive metal layer and the adhesive glue. The invention avoids the defect that the metal powder is easy to agglomerate and is not easy to be uniformly dispersed in the adhesive, which is caused by mixing the metal powder in the adhesive in the prior art. In addition, the connection between the carbon sliding plate and the metal bracket is stronger, the resistance is more uniform and smaller, and the connection strength of the resulting product is higher. The bonding process of the present invention is simple.

Description

Collector shoe carbon sliding plate, preparation method thereof and electric vehicle
Technical Field
The invention relates to the field of collector shoe carbon sliding plates, in particular to a collector shoe carbon sliding plate, a preparation method thereof and an electric vehicle comprising the collector shoe carbon sliding plate.
Background
The collector shoe, also called as a current collecting shoe, refers to a current collecting device of an underground railway electric motor train unit contacting with a third rail. The collector shoes are arranged at the positions of the two sides of the vehicle bogie frame close to the middle part of the outer side of the vehicle. It can be put down when in use and put up when not in use. The contact rail is an additional conductive rail, also called third rail or shortly three rail, laid along the track line parallel to the track. The third rail is typically mounted to the left of the direction of travel of the line. The contact rail material is generally made of low-carbon steel or steel-aluminum composite material. And the collector shoe extending out of the electric motor coach bogie frame obtains electric energy by contacting with the third rail. Therefore, the quality of the carbon sliding plate of the contact part of the collector shoe directly contacting with the third rail is directly related to the current collection quality of the collector shoe, and the safe operation of the electric vehicle is also influenced. Therefore, the collector shoe carbon sliding plate must have the following conditions: (1) good conductive performance; (2) excellent abrasion resistance and self-lubricity; (3) the mechanical strength is high, and the vibration and impact load can be withstood without damage; (4) the hardness value is lower than that of the contact wire; (5) the weight is light. At present, the current collector shoe carbon sliding plates in China are mostly pure carbon sliding plates and metal-impregnated carbon sliding plates.
Patent application CN102126437 discloses a pantograph pan and a production method thereof, which comprises a carbon pan and a bracket, wherein a metal layer and a metal mesh are used as conductive phases, adhesive glue is used as an adhesive phase, the pantograph pan comprises a first metal mesh, the first metal mesh is arranged between the carbon pan and the bracket, and the first metal mesh, the carbon pan and the bracket are adhered by the adhesive glue. The production mode of the pantograph slide plate comprises the following steps: A. providing a bracket and a carbon sliding plate, firstly carrying out sand blasting treatment on the surfaces of the bracket and the carbon sliding plate, spraying a second metal layer on the surface of the bracket, and spraying a third metal layer on the surface of the carbon sliding plate; B. placing a first metal net on the surface of the bracket; C. uniformly coating the bonding glue on the first metal mesh; D. and placing the carbon sliding plate on the first metal net, pressing and keeping, and bonding the first metal net, the carbon sliding plate and the bracket after the bonding glue is solidified.
However, the bonding process is complex by adopting the technology, namely the first metal net needs to be paved, and the second metal layer and the third metal layer need to be sprayed; meanwhile, because the first metal mesh (copper mesh) is in internal stress, the corner position of the metal mesh is easy to tilt during laying, so that the first metal mesh is difficult to be flatly placed on the bracket, and the coating of the bonding glue is influenced. Meanwhile, the resistance and the connection strength between the bracket and the carbon slide of the resulting product need to be further improved.
Patent application CN201520695706.4 discloses a pantograph slide plate for electric vehicle, discloses slider, air flue, conductive net and bracket bond through high temperature resistant electrically conductive bonding glue, high temperature resistant electrically conductive bonding glue is high temperature resistant copper powder conducting adhesive, high temperature resistant silver-copper powder conducting adhesive or high temperature resistant silver powder conducting adhesive, for example high temperature resistant modified epoxy and phenolic aldehyde copper powder conducting adhesive, high temperature resistant modified epoxy copper powder conducting adhesive, copper powder electron conducting adhesive, high temperature resistant modified epoxy and phenolic aldehyde silver-copper powder conducting adhesive, silver powder electron conducting adhesive, epoxy type conducting silver adhesive.
Although the technical scheme does not need to spray the second metal layer and the third metal layer, operation steps are saved, the conductive mesh (such as a conductive copper mesh) still needs to be bonded before the carbon sliding plate and the metal bracket, the problem that the corner position of the metal mesh is easy to tilt still exists, metal powder is easy to agglomerate in the using process of the conductive adhesive used in the patent application and is not easy to uniformly disperse in the adhesive, so that the uniformity of bonding resistance is affected, the viscosity of the conductive adhesive is high, the conductive adhesive is not beneficial to glue brushing, and the resistance and the connection strength between the bracket for preparing the obtained product and the carbon sliding plate need to be further improved.
Disclosure of Invention
The invention aims to overcome the defects that in the prior art, the edge angle position of a metal net is easy to tilt to cause that adhesive glue is not easy to coat due to the fact that the metal net is arranged on a carbon sliding plate and a metal support, or when metal powder is mixed into the adhesive glue, the metal powder is easy to agglomerate and is not easy to uniformly disperse in the adhesive glue, so that the uniformity of resistance between the metal support and the carbon sliding plate is influenced, the viscosity of the conductive glue is high and is not beneficial to glue brushing, and the resistance between the metal support and the carbon sliding plate of the existing product is high and the connection strength is low; the carbon sliding plate is connected with the metal support through the conductive metal layer and the bonding glue.
In a second aspect, the present invention provides a method for preparing a collector shoe carbon sliding plate, comprising:
(1) forming a conductive metal layer with pores on the surface of the metal bracket, wherein the conductive metal layer is integrated with the metal bracket;
(2) filling bonding glue in the pores of the conductive metal layer, covering a carbon sliding plate on the surface of the conductive metal layer filled with the bonding glue, wherein the carbon sliding plate is connected with the metal bracket through the conductive metal layer and the bonding glue; and curing the adhesive to obtain the collector shoe carbon sliding plate.
In a third aspect, the invention provides a collector shoe carbon skid plate prepared by the method described above.
In a fourth aspect, the invention provides an electric vehicle comprising a collector shoe carbon ski as described above.
According to the invention, the conductive metal layer with the holes is arranged on the surface of the metal support, and the conductive metal layer and the metal support are integrated, so that the defect that metal powder is easy to agglomerate and is difficult to uniformly disperse in adhesive because the metal powder is mixed in the adhesive and the adhesive mixed with the metal powder is coated on the surface of the metal support to form the conductive metal layer in the prior art is overcome. In addition, the bonding process is simple, a metal net does not need to be bonded, the problem that the edge angle position of the metal net is easy to tilt so as to influence the coating of bonding glue is solved, and a third metal layer does not need to be sprayed on the bonding surface of the carbon sliding plate.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The conductive metal layer with the holes is arranged on the surface of the metal support, and the conductive metal layer and the metal support are integrated, so that the defect that metal powder is easy to agglomerate and is difficult to uniformly disperse in adhesive glue due to the fact that metal powder is mixed in the adhesive glue and the adhesive glue mixed with the metal powder is coated on the surface of the metal support to form the conductive metal layer in the prior art is overcome. In addition, the bonding process is simple, a metal net does not need to be bonded, the problem that the edge angle position of the metal net is easy to tilt so as to influence the coating of bonding glue is solved, and a third metal layer does not need to be sprayed on the bonding surface of the carbon sliding plate.
Based on the above findings, the first aspect of the present invention provides a collector shoe carbon ski comprising a metal support, a conductive metal layer located on a surface of the metal support and integral with the metal support, and a carbon ski located on a surface of the conductive metal layer;
the carbon sliding plate is connected with the metal support through the conductive metal layer and the bonding glue.
According to a preferred embodiment of the present invention, the conductive metal layer is preferably formed on the surface of the metal support by means of metallurgical bonding, for example, sintering, and the sintering condition is preferably such that the bonding strength between the conductive metal layer and the metal support is 0.5-1.0 MPa. The sintering conditions may include: the sintering temperature is 800-1000 ℃, and the sintering time is 2-5 h.
According to the present invention, the conductive metal layer may be formed of various metal powders known in the art that can be used for the collector shoe carbon skid, for example, copper powder, silver powder, a mixture of copper powder and silver powder, and the like. Preferably, the metal powder is copper powder, more preferably, the copper powder is atomized copper powder, and further preferably atomized copper powder with a particle size of 20 to 50 mesh, which can be obtained commercially. In this preferred case, the electrical resistance of the collector shoe carbon skid plate prepared is more uniform, the electrical resistance is smaller and the connection strength between the metal support and the carbon skid plate is higher.
According to the invention, the thickness of the conductive metal layer on the support can be selected within wide limits, preferably the thickness of the conductive metal layer is 0.3-0.9mm, for example 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9 mm. Under the preferable condition, the subsequent coating of the bonding glue is more facilitated, and the bonding glue is filled in the pores of the conductive metal layer, so that the uniformity of the resistance between the carbon sliding plate and the metal bracket and the connection strength between the metal bracket and the carbon sliding plate can be further improved.
According to a preferred embodiment of the present invention, the strength of the connection between the metal holder and the carbon skid plate is 7MPa or more, preferably 7 to 10 MPa.
According to a preferred embodiment of the invention, the electrical resistance between the metal support and the carbon slide is 0.1-0.5m Ω, for example 0.1m Ω, 0.2m Ω, 0.3m Ω, 0.4m Ω, 0.5m Ω.
According to the present invention, preferably, the aperture penetrates through the conductive metal layer (that is, a section of the aperture is open to the metal holder, and the other end of the aperture is open to the outer surface of the conductive metal layer), and the adhesive can contact the surface of the metal holder through the aperture penetrating through the conductive metal layer. According to a preferred embodiment of the invention, the porosity of the pores is between 40 and 70%, for example 40%, 45%, 50%, 55%, 60%, 65%, 70%. At the preferable porosity, the uniformity of the resistance between the carbon sliding plate and the metal support and the connection strength between the metal support and the carbon sliding plate can be further improved. Preferably, the pores of the conductive metal layer may further include pores located inside and/or on the surface of the conductive metal layer.
According to a preferred embodiment of the present invention, the adhesive glue connects the metal bracket and the carbon sliding plate by filling the pores of the conductive metal layer, and preferably, at least a part of the adhesive glue is attached to at least a part of the surface of the conductive metal layer to indirectly connect the metal bracket and the carbon sliding plate. Preferably, the adhesive paste attached to the surface of the conductive metal layer has a thickness of 20 μm or less, and may be, for example, 0 μm, 1 μm, 3 μm, 5 μm, 7 μm, 9 μm, 11 μm, 13 μm, 15 μm, 17 μm, 19 μm, or 20 μm.
According to the present invention, in order to further improve the connection strength between the metal bracket and the carbon sliding plate, preferably, the heat resistant temperature of the adhesive is 150 ℃ or higher, for example, 150-. Preferably, the adhesive paste is a heat-resistant epoxy resin system, and according to a preferred embodiment of the present invention, the adhesive paste contains novolac epoxy resin, bisphenol a epoxy resin, a silane coupling agent and a curing agent, that is, the novolac epoxy resin, the bisphenol a epoxy resin and the silane coupling agent in the adhesive paste bond the metal bracket and the carbon sliding plate and the conductive metal layer and the carbon sliding plate together by curing under the action of the curing agent. Further preferably, the content of the bisphenol a type epoxy resin is 20 to 80 parts by weight, preferably 40 to 60 parts by weight, the content of the silane coupling agent is 1 to 10 parts by weight, preferably 4 to 6 parts by weight, and the content of the curing agent is 10 to 20 parts by weight, preferably 14 to 17 parts by weight, relative to 100 parts by weight of the novolac epoxy resin.
Among them, the curing agent may be a curing agent capable of curing a novolac epoxy resin, a bisphenol a type epoxy resin, and a silane coupling agent, and preferably, the curing agent is imidazole.
According to the present invention, the metal bracket may be made of various materials conventionally used in the art, and may be made of stainless steel, for example.
According to a second aspect of the present invention, there is provided a method for manufacturing a collector shoe carbon sliding plate, the method comprising:
(1) forming a conductive metal layer with pores on the surface of the metal bracket, wherein the conductive metal layer is integrated with the metal bracket;
(2) filling bonding glue in the pores of the conductive metal layer, covering a carbon sliding plate on the surface of the conductive metal layer filled with the bonding glue, wherein the carbon sliding plate is connected with the metal bracket through the conductive metal layer and the bonding glue; and curing the adhesive to obtain the collector shoe carbon sliding plate.
According to a preferred embodiment of the present invention, in step (1), a metal powder is laid on the surface of a metal support and sintered to form a conductive metal layer having pores on the surface of the metal support, wherein the sintering conditions can be selected in a wide range, and the sintering conditions are preferably such that the bonding strength between the conductive metal layer and the metal support is 0.5-1.0 MPa; preferably, the sintering temperature is 800-1000 ℃, and the sintering time is 2-5 h. According to a further preferred embodiment of the present invention, the rate of temperature rise to the sintering temperature is 5-15 ℃/min, for example, 5 ℃/min, 6 ℃/min, 7 ℃/min, 8 ℃/min, 9 ℃/min, 10 ℃/min, 11 ℃/min, 12 ℃/min, 13 ℃/min, 14 ℃/min, 15 ℃/min. At the preferable temperature rising speed, the metal powder can be better attached to the surface of the metal support, more uniform conductivity is provided, the bonding strength between the conductive metal layer and the metal support can be improved, and the connection strength between the metal support and the carbon sliding plate can be improved.
According to the present invention, the sintering is preferably performed under an atmosphere of an inert gas, which is a gas that does not react with the metal holder and the metal powder at the sintering temperature, and may be, for example, nitrogen, argon, helium, a combination thereof, or the like.
According to the present invention, the metal powder may be any of various metal powders known in the art and applicable to a collector shoe carbon skid plate, for example, copper powder, silver powder, a mixture of copper powder and silver powder, and the like. Preferably, the metal powder is copper powder, more preferably, the copper powder is atomized copper powder, and further preferably atomized copper powder with a particle size of 20 to 50 mesh, which can be obtained commercially. In this preferred case, the electrical resistance of the collector shoe carbon skid plate prepared is more uniform, the electrical resistance is smaller and the connection strength between the metal support and the carbon skid plate is higher.
According to the present invention, the thickness of the conductive metal layer formed on the support may be selected within a wide range, and preferably, the thickness of the conductive metal layer is 0.3 to 0.9mm, for example, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9 mm. Under the preferable condition, the subsequent coating of the adhesive is more facilitated, and the adhesive is filled in the pores of the conductive metal layer and attached to the surface of the conductive metal layer, so that the uniformity of the resistance between the carbon sliding plate and the metal support and the connection strength between the metal support and the carbon sliding plate can be further improved.
According to the present invention, the pores penetrate through the conductive metal layer (i.e., one section of the pores is opened on the metal support, and the other end of the pores is opened on the outer surface of the conductive metal layer), and the adhesive can contact the surface of the metal support through the pores penetrating through the conductive metal layer. According to a preferred embodiment of the invention, the porosity of the pores is between 40 and 70%, for example 40%, 45%, 50%, 55%, 60%, 65%, 70%. At the preferable porosity, the uniformity of the resistance between the carbon sliding plate and the metal support and the connection strength between the metal support and the carbon sliding plate can be further improved. Preferably, the pores of the conductive metal layer obtained in step (1) may further include pores located inside and/or on the surface of the conductive metal layer.
According to the present invention, in the step (2), at least a part of the surface of the conductive metal layer is preferably coated with at least a part of an adhesive to indirectly connect the metal bracket and the carbon slider. Therefore, in the final product, the adhesive glue is further cured on at least part of the surface of the conductive metal layer, and preferably, the thickness of the adhesive glue cured on the surface of the conductive metal layer is less than or equal to 20 μm, and may be, for example, 0 μm, 1 μm, 3 μm, 5 μm, 7 μm, 9 μm, 11 μm, 13 μm, 15 μm, 17 μm, 19 μm, or 20 μm.
According to the present invention, in order to further improve the connection strength between the metal bracket and the carbon sliding plate, it is preferable that the heat resistant temperature of the adhesive is 150 ℃ or more, for example, 150-. The adhesive can penetrate into the pores of the conductive metal layer and can also be adhered to the surface of the conductive metal layer, and the amount and the type of the heat-resistant adhesive can be selected so that the connection strength between the metal bracket and the carbon sliding plate is above 7MPa, preferably 7-10 MPa.
Preferably, the adhesive glue is a heat-resistant epoxy resin system and consists of glue A and glue B, wherein the glue A is heat-resistant epoxy resin, and the glue B is a curing agent. In order to further improve the connection strength between the metal bracket and the carbon sliding plate, the glue A preferably contains novolac epoxy resin, bisphenol A epoxy resin and a silane coupling agent, and the glue B is a curing agent. When not in use, the glue A and the glue B are stored separately and then mixed when in use. And the phenolic epoxy resin, the bisphenol A epoxy resin and the silane coupling agent in the adhesive glue are used for connecting the metal bracket and the carbon sliding plate through curing under the action of a curing agent. Further preferably, the content of the bisphenol A type epoxy resin is 20 to 80 parts by weight and the content of the silane coupling agent is 1 to 10 parts by weight relative to 100 parts by weight of the novolac epoxy resin; the content of the glue B is 5-15 parts by weight relative to 100 parts by weight of the glue A. More preferably, the content of the bisphenol A type epoxy resin is 40 to 60 parts by weight and the content of the silane coupling agent is 4 to 6 parts by weight with respect to 100 parts by weight of the novolac epoxy resin; the content of the glue B is 8-12 parts by weight relative to 100 parts by weight of the glue A.
Among them, the curing agent may be a curing agent capable of curing a novolac epoxy resin, a bisphenol a type epoxy resin, and a silane coupling agent, and preferably, the curing agent is imidazole.
According to a preferred embodiment of the present invention, after the adhesive paste is applied, the metal bracket and the carbon sliding plate can be closely attached by applying an external force. Wherein the connection resistance between the metal holder and the carbon slide can be made 0.1-0.5m Ω, for example, 0.1m Ω, 0.2m Ω, 0.3m Ω, 0.4m Ω, 0.5m Ω by controlling the applied external force.
The conditions under which the adhesive is cured according to the present invention may be conventional in the art, for example, the curing temperature is 70-150 ℃ and the curing time is 4-8 hours. According to a preferred embodiment of the present invention, the curing is performed in 2 temperature stages, which can effectively reduce the resistance and improve the connection strength between the metal support and the carbon sliding plate. Specifically, the curing time can be first from 70 ℃ to 100 ℃ for 2 to 4 hours, and then from 100 ℃ to 150 ℃ for 2 to 4 hours.
According to the present invention, the metal bracket may be made of various materials conventionally used in the art, and may be made of stainless steel, for example.
According to a third aspect of the invention, a collector shoe carbon sliding plate prepared by the method is also provided.
According to a fourth aspect of the invention, there is also provided an electric power vehicle comprising a collector shoe carbon ski as described above.
The present invention will be described in detail below by way of examples.
In the following examples and comparative examples,
the method for measuring the porosity of the conductive metal layer comprises the following steps: firstly, calculating the corresponding particle size of atomized copper powder, wherein if the average particle size is 830 mu m in 20 meshes, the laying area of single-particle copper powder is S-pi r2＝0.54mm2Volume of 0.299mm3The mass of the single-grain copper powder is 0.00266 g-2.66 x 10-6kg (density of copper 8.9 g/cm)3) That is, the number of copper powder particles per gram of copper powder is 1/0.00266-375, corresponding to a coverage area of 375 x 0.54mm2＝203mm2＝2.03*10-4m2The coverage area of 1kg of 20-mesh copper powder laid per square meter is 1000 x 2.03 x 10-4m2＝0.203m2. Wherein the porosity (%) (area m of the metal stent)2-0.203 x amount of laying kg)/area of metal stent m2*100％。
The bonding strength of the conductive metal layer to the metal bracket is determined for the flexible material versus the rigid material with reference to the GB/T2790-.
The connection strength between the metal bracket and the carbon slide plate is referred to GB/T2790-.
Example 1
This example is used to illustrate the collector shoe carbon slide plate provided by the present invention and the preparation method thereof
1. Preparation of the Carrier
Uniformly laying 20-mesh atomized copper powder (customized to Beijing New Material Co., Ltd.) on a stainless steel bracket with a laying density of 2.7kg/m2And then putting the bracket paved with the copper powder into a sintering furnace, heating to 1000 ℃ at a heating rate of 10 ℃/min under the protection of nitrogen, preserving the heat for 2h at the temperature, cooling to the normal temperature, taking out the stainless steel bracket, and bonding the copper powder on the stainless steel bracket to form a conductive metal layer integrated with the stainless steel bracket, wherein the porosity and the thickness of the conductive metal layer and the bonding strength of the conductive metal layer and the metal bracket are shown in table 1.
2. Bonding of brackets to carbon slides
Firstly, adhesive A (10 parts by weight of novolac epoxy resin (purchased from Guangzhou hundred million a kind of jade Sheng chemical Co., Ltd., product No. F51), 5 parts by weight of bisphenol A type epoxy resin (purchased from tin-free resin factory of blue Star chemical New Material Co., Ltd., product No. E51) and 0.5 part of silane coupling agent) and adhesive B (imidazole curing agent purchased from Heizhou Shengshida science and technology Co., Ltd., product No. SST-1665) are prepared into adhesive according to the weight ratio of 10:1. Brushing adhesive glue on the bonding surfaces of the conductive metal layer and the carbon sliding plate, wherein the adhesive glue is filled in the pores of the conductive metal layer and attached to the surface of the conductive metal layer, then bonding the bracket and the carbon sliding plate, applying a certain force to the bracket and the carbon sliding plate to enable the bracket and the carbon sliding plate to be tightly attached, and then curing the adhesive glue (150 ℃/4h) to complete the whole bonding process to obtain the collector shoe carbon sliding plate, wherein the bonding strength between the metal bracket and the carbon sliding plate is shown in table 1.
Example 2
This example is used to illustrate the collector shoe carbon slide plate provided by the present invention and the preparation method thereof
1. Preparation of the Carrier
50-mesh atomized copper powder (made by Beijing Innovative Material Co., Ltd.) was uniformly laid on a stainless steel carrier at a laying density of 2.2kg/m2And then putting the bracket paved with the copper powder into a sintering furnace, heating to 800 ℃ at a heating rate of 8 ℃/min under the protection of nitrogen, preserving the heat for 5 hours at the temperature, cooling to the normal temperature, taking out the stainless steel bracket, and bonding the copper powder on the stainless steel bracket to form a conductive metal layer integrated with the stainless steel bracket, wherein the porosity and the thickness of the conductive metal layer and the bonding strength of the conductive metal layer and the metal bracket are shown in table 1.
2. Bonding of brackets to carbon slides
Firstly, adhesive A (10 parts by weight of novolac epoxy resin (purchased from Guangzhou hundred million a kind of jade Sheng chemical Co., Ltd., product No. F51), 4 parts by weight of bisphenol A type epoxy resin (purchased from tin-free resin factory of blue Star chemical New Material Co., Ltd., product No. E44) and 0.6 part of silane coupling agent) and adhesive B (imidazole curing agent purchased from Heizhou Shengshida science and technology Co., Ltd., product No. SST-1665) are prepared into adhesive according to the weight ratio of 10: 0.8. Brushing adhesive glue on the surface of the conductive metal layer and the bonding surface of the carbon sliding plate, wherein the adhesive glue is filled in the pores of the conductive metal layer and attached to the surface of the conductive metal layer, then bonding the bracket and the carbon sliding plate, applying a certain force to the bracket and the carbon sliding plate to enable the bracket and the carbon sliding plate to be tightly attached, then curing the adhesive glue (80 ℃/8h) to complete the whole bonding process, and obtaining the collector shoe carbon sliding plate, wherein the bonding strength between the metal bracket and the carbon sliding plate is shown in table 1.
Example 3
This example is used to illustrate the collector shoe carbon slide plate provided by the present invention and the preparation method thereof
1. Preparation of the Carrier
Uniformly laying 30-mesh atomized copper powder (customized to Beijing New Material Co., Ltd.) on a stainless steel bracket, wherein the laying density is 2.7kg/m2Then putting the bracket paved with the copper powder into a sintering furnace, heating to 900 ℃ at the heating rate of 12 ℃/min under the protection of nitrogen, preserving the heat for 3h at the temperature, and then cooling to the temperatureAnd (3) taking out the stainless steel bracket at normal temperature, wherein copper powder is adhered to the stainless steel bracket to form a conductive metal layer integrated with the stainless steel bracket, and the porosity and the thickness of the conductive metal layer and the bonding strength of the conductive metal layer and the metal bracket are shown in table 1.
2. Bonding of brackets to carbon slides
Firstly, adhesive A (10 parts by weight of novolac epoxy resin (purchased from Guangzhou hundred million a kind of jade Sheng chemical Co., Ltd., product No. F44), 6 parts by weight of bisphenol A type epoxy resin (purchased from tin-free resin factory of blue Star chemical New Material Co., Ltd., product No. E44) and 0.4 part of silane coupling agent) and adhesive B (imidazole curing agent purchased from Huizhou Shengshida science and technology Co., Ltd., product No. SST-1665) are prepared into adhesive according to the weight ratio of 10: 1.2. Brushing adhesive glue on the surface of the bracket sintered with the atomized copper powder and the bonding surface of the carbon sliding plate, wherein the adhesive glue is filled in the pores of the conductive metal layer and attached to the surface of the conductive metal layer, then bonding the bracket and the carbon sliding plate, applying a certain force to the bracket and the carbon sliding plate to enable the bracket and the carbon sliding plate to be tightly attached, then curing the adhesive glue (120 ℃/6h) to complete the whole bonding process, and obtaining the collector shoe carbon sliding plate, wherein the bonding strength between the metal bracket and the carbon sliding plate is shown in table 1.
Example 4
This example is used to illustrate the collector shoe carbon slide plate provided by the present invention and the preparation method thereof
The collector shoe carbon ski was prepared as in example 2, except that the adhesive was cured at 80 ℃ for 2 hours and then at 120 ℃ for 2 hours.
Example 5
This example is used to illustrate the collector shoe carbon slide plate provided by the present invention and the preparation method thereof
The collector shoe carbon ski was prepared as in example 2, except that atomized copper powder was applied to the surface of the metal support by spraying, in the same amount as in example 2, to form a conductive metal layer.
Example 6
This example is used to illustrate the collector shoe carbon slide plate provided by the present invention and the preparation method thereof
The collector shoe carbon sliding plate was produced by the method of example 2, except that the adhesive was free of bisphenol a type epoxy resin.
Example 7
This example is used to illustrate the collector shoe carbon slide plate provided by the present invention and the preparation method thereof
The collector shoe carbon ski was prepared according to the method of example 2, except that the curing agent used in the adhesive was an alicyclic polyamine.
Example 8
This example is used to illustrate the collector shoe carbon slide plate provided by the present invention and the preparation method thereof
The collector shoe carbon skid plate was prepared as in example 2, except that the temperature was raised to the sintering temperature at a rate of 20 ℃/min.
Example 9
This example illustrates a reference collector shoe carbon slide and method of making
The collector shoe carbon ski was prepared as in example 2, except that the metal support surface was 85% covered with atomized copper powder.
Comparative example 1
Collector shoe carbon sliding plate for reference and preparation method thereof
The collector shoe carbon skid was prepared as in example 2, except that atomized copper powder was mixed with the adhesive and coated on the metal holder and the carbon skid to bond the two.
TABLE 1
Figure BDA0001803420280000141
Test example
The method for testing the uniformity of the bonding resistance comprises the following steps: the adhesion resistance was measured using voltammetry at both ends and the middle portion of the product, and the uniformity was compared by comparing the difference in adhesion resistance at each position, and the results are shown in table 2.
TABLE 2
Figure BDA0001803420280000142
Figure BDA0001803420280000151
As can be seen from the results in tables 1 and 2, according to the present invention, the conductive metal layer having the pores is directly formed on the surface of the metal support, and is integrated with the metal support, and the pores of the conductive metal layer are filled with the adhesive, such that the connection between the carbon sliding plate and the metal support is firmer, and the resistance between the carbon sliding plate and the metal support is more uniform and smaller. In addition, the bonding process is simple, a metal net does not need to be bonded, the problem that the edge angle position of the metal net is easy to tilt so as to influence the coating of bonding glue is solved, and a third metal layer does not need to be sprayed on the bonding surface of the carbon sliding plate.
In addition, comparing example 2 with examples 4-9, it can be seen that the copper powder is formed on the surface of the metal support by sintering and the preferable adhesive formulation, the preferable temperature rise speed and the preferable porosity can further improve the performance of the collector shoe carbon sliding plate.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.

Claims (17)

1. The collector shoe carbon skateboard is characterized by comprising a metal bracket, a conductive metal layer and a carbon skateboard, wherein the conductive metal layer is positioned on the surface of the metal bracket and is integrated with the metal bracket;
the carbon sliding plate is connected with the metal support through the conductive metal layer and the bonding glue.
2. The collector shoe carbon ski of claim 1, wherein the apertures comprise apertures through the conductive metal layer, the adhesive contacting the metal brace surface through the apertures through the conductive metal layer;
preferably, the pores further comprise pores located inside and/or on the surface of the conductive metal layer;
preferably, the porosity of the pores is 40 to 70%.
3. The collector shoe carbon ski of claim 1, wherein the strength of the connection between the metal bracket and the carbon ski is 7MPa or greater;
preferably, the resistance between the metal support and the carbon slide is 0.1-0.5m Ω.
4. The collector shoe carbon ski of claim 1, wherein the conductive metal layer is formed on the surface of the metal support by a metallurgical bond, and the bonding strength of the conductive metal layer to the metal support is 0.5-1.0 MPa.
5. The collector shoe carbon ski of claim 1, wherein the thickness of the conductive metal layer is 0.3-0.9 mm;
preferably, the conductive metal layer is formed by sintering copper powder and/or silver powder, preferably atomized copper powder.
6. The collector shoe carbon ski of claim 1, wherein an adhesive is attached to at least a portion of the surface of the conductive metal layer, and the adhesive attached to the surface of the conductive metal layer has a thickness of 20 μm or less.
7. The collector shoe carbon ski of claim 1, wherein the bond paste has a heat resistance temperature of 150 ℃ or higher;
preferably, the adhesive glue contains phenolic epoxy resin, bisphenol A epoxy resin, a silane coupling agent and a curing agent;
preferably, the content of the bisphenol A type epoxy resin is 20 to 80 parts by weight, the content of the silane coupling agent is 1 to 10 parts by weight, and the content of the curing agent is 10 to 20 parts by weight, relative to 100 parts by weight of the novolac epoxy resin.
8. A preparation method of a collector shoe carbon skateboard is characterized by comprising the following steps:
(1) forming a conductive metal layer with pores on the surface of the metal bracket, wherein the conductive metal layer is integrated with the metal bracket;
(2) filling bonding glue in the pores of the conductive metal layer, covering a carbon sliding plate on the surface of the conductive metal layer filled with the bonding glue, wherein the carbon sliding plate is connected with the metal bracket through the conductive metal layer and the bonding glue; and curing the adhesive to obtain the collector shoe carbon sliding plate.
9. The method of claim 8, wherein the aperture comprises an aperture through the conductive metal layer, the adhesive contacting the metal mount surface through the aperture through the conductive metal layer;
preferably, the pores further comprise pores located inside and/or on the surface of the conductive metal layer;
preferably, the porosity of the pores is 40 to 70%.
10. The method according to claim 8 or 9, wherein in the step (1), metal powder is laid on the surface of the metal support and sintered to form a conductive metal layer with pores on the surface of the metal support, wherein the conductive metal layer is integrated with the metal support; preferably, the metal bracket with the metal powder laid on the surface is sintered in an inert gas atmosphere;
preferably, the metal powder is copper powder and/or silver powder, and is preferably atomized copper powder;
preferably, the sintering conditions include: the temperature is 800-;
preferably, the bonding strength between the conductive metal layer and the metal support is 0.5-1.0 MPa.
11. The method of claim 8, wherein in step (1), the conductive metal layer has a thickness of 0.3-0.9 mm.
12. The method as claimed in claim 8, wherein in step (2), at least part of the surface of the conductive metal layer is cured with adhesive glue, and the thickness of the adhesive glue cured on the surface of the conductive metal layer is less than or equal to 20 μm.
13. The method according to claim 8, wherein in the step (2), the obtained collector shoe carbon sliding plate has a connection strength between the metal bracket and the carbon sliding plate of 7MPa or more;
preferably, the resistance between the metal support and the carbon slide is 0.1-0.5m Ω.
14. The method of claim 8, wherein the heat resistant temperature of the adhesive glue is above 150 ℃;
preferably, the adhesive glue comprises glue A and glue B which are independently stored and mixed when in use, wherein the glue A contains novolac epoxy resin, bisphenol A type epoxy resin and silane coupling agent, and the glue B contains curing agent;
preferably, the content of the bisphenol A type epoxy resin is 20 to 80 parts by weight and the content of the silane coupling agent is 1 to 10 parts by weight relative to 100 parts by weight of the novolac epoxy resin; the content of the glue B is 5-15 parts by weight relative to 100 parts by weight of the glue A.
15. The method of claim 8, wherein in step (2), the curing conditions comprise: the temperature is 70-150 ℃, and the time is 4-8 hours;
preferably, the curing conditions include: curing at 70-100 ℃ for 2-4 hours, and then curing at 100-150 ℃ for 2-4 hours.
16. A collector shoe carbon ski prepared by the method of any one of claims 8 to 15.
17. An electric power cart comprising a collector shoe carbon ski of any one of claims 1-7 and 16.
CN201811087106.4A 2018-09-18 2018-09-18 Collector shoe carbon sliding plate, preparation method thereof and electric vehicle Pending CN110901400A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0694217B1 (en) * 1991-09-04 1997-10-15 Morganite Electrical Carbon Limited A method of forming an electrically conductive joint between carbon and metal, and an article comprising a conductive joint between carbon and metal
JP2002084602A (en) * 2000-09-07 2002-03-22 Railway Technical Res Inst Sliding current collector and method of configuring the same
RU2006129322A (en) * 2004-01-05 2008-02-27 Пантрак Гмбх (De) SENSOR DEVICE FOR SIGNAL TRANSMISSION ON THE DEGREE OF CONTACT ELEMENTS WEAR
CN201320972Y (en) * 2008-12-28 2009-10-07 张群超 Electric locomotive pantograph straight bow carbon slide board
CN102126437A (en) * 2010-01-20 2011-07-20 上海摩根碳制品有限公司 Pantograph pan and production method thereof
CN204978276U (en) * 2015-09-09 2016-01-20 中南大学 Electric power is pantograph slide for vehicle
CN205601624U (en) * 2016-03-23 2016-09-28 中南大学 CC combined material slide of low bonding resistance
CN107757377A (en) * 2017-11-27 2018-03-06 大同新成新材料股份有限公司 A kind of air flue bracket integrated novel pantograph carbon slide

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0694217B1 (en) * 1991-09-04 1997-10-15 Morganite Electrical Carbon Limited A method of forming an electrically conductive joint between carbon and metal, and an article comprising a conductive joint between carbon and metal
JP2002084602A (en) * 2000-09-07 2002-03-22 Railway Technical Res Inst Sliding current collector and method of configuring the same
RU2006129322A (en) * 2004-01-05 2008-02-27 Пантрак Гмбх (De) SENSOR DEVICE FOR SIGNAL TRANSMISSION ON THE DEGREE OF CONTACT ELEMENTS WEAR
CN201320972Y (en) * 2008-12-28 2009-10-07 张群超 Electric locomotive pantograph straight bow carbon slide board
CN102126437A (en) * 2010-01-20 2011-07-20 上海摩根碳制品有限公司 Pantograph pan and production method thereof
CN204978276U (en) * 2015-09-09 2016-01-20 中南大学 Electric power is pantograph slide for vehicle
CN205601624U (en) * 2016-03-23 2016-09-28 中南大学 CC combined material slide of low bonding resistance
CN107757377A (en) * 2017-11-27 2018-03-06 大同新成新材料股份有限公司 A kind of air flue bracket integrated novel pantograph carbon slide

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Application publication date: 20200324