Electric connection structure of electronic component contact and control equipment
By introducing a parallel contact piece with thermal conductivity into the electrical connection structure of the high-voltage control box and setting a conductive part with the main circuit contact piece, the problem of excessive temperature at the connection part under high current is solved, and better thermal management effect is achieved.
Patent Information
- Application Number
- CN202411745402.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-02-25
Smart Images
Figure CN119518321A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of electrical connection structures, and in particular to an electrical connection structure of electronic component contacts and a control device. Background Art
[0002] High-voltage control box / distribution box (BDU, PDU) is an important protection and control module of the high-voltage circuit system of electric vehicles, and an important part of the vehicle control system of electric vehicles. Its function is to realize the on-off control, protection and energy distribution of the electric power of the electric vehicle power battery, and coordinate the function conversion of high-voltage accessories such as the drive motor control system, battery management system, charging management system, DC / DC, electric air conditioning, electric power steering, and braking system. At present, control box products are basically customized according to the needs of car manufacturers. Since the current working conditions of each vehicle platform are different, internal thermal management is the main design topic.
[0003] The high-voltage control box is mainly composed of relays, fuses, pre-charging resistors, copper busbars, connectors, current sensors, wiring harnesses and other components as well as an external shell. At present, the main high-current electrical connection method in the industry is to connect the copper busbar (main circuit contact piece) directly to the contacts of standard components through bolts. The specific electrical connection structure between the copper busbar and the contacts of the components is shown in the attached figure. Figure 7 and attached Figure 8 As shown. Since the main electronic components are generally standard products, based on volume and cost considerations, when electronic component manufacturers develop a series of standard products, the size of the contacts is mainly designed to meet the bolt tightening requirements. There is a lack of consideration for the heat conduction and heat dissipation requirements at the heat source. The cross-sectional size of the contacts cannot meet the high current working conditions, resulting in the connection between the main circuit copper sheet and the component contacts under high current working conditions. The problem of excessive temperature is easy to occur, and the thermal management requirements under high current cannot be met. Summary of the invention
[0004] In view of the shortcomings of the prior art, the present invention provides an electrical connection structure for electronic component contacts, which mainly solves the technical problem that the connection parts between the main circuit copper sheet and the component contacts in the prior art are prone to overheating under high current working conditions and cannot meet the thermal management requirements of the product under high current.
[0005] To achieve the above object, the present invention is achieved through the following technical solutions: An electrical connection structure for an electrical component contact includes a fastener, a main circuit contact piece, and at least a parallel contact piece with heat conduction performance. The contact of the electrical component has a first contact surface and a second contact surface that are opposite to each other. At least the main circuit contact piece is closely fitted with the first contact surface of the contact through the fastener, and the parallel contact piece is configured to be closely attached to the second contact surface of the contact, and there is at least a conduction part for conducting heat between the parallel contact piece and the main circuit contact piece.
[0006] Further, the contact mating surface of the parallel contact piece corresponding to the contact is a planar structure. The parallel contact piece has extension parts extending towards both sides relative to the contact, and a spaced space is respectively formed between the two extension parts and the main circuit contact piece, and a conduction part is respectively arranged in the two spaced spaces.
[0007] Further, the conduction part is a heat-conducting gasket with heat conduction performance.
[0008] Further, the parallel contact piece and the conduction part are metal piece structures with heat conduction performance and electrical conductivity.
[0005] Further, the conduction part is a bent metal sheet with elastic deformation performance. The bent metal sheet is configured to be elastically abutted between the parallel contact piece and the main circuit contact piece, so that a parallel electrical connection structure is formed between the parallel contact piece and the main circuit contact piece and heat can be conducted between them.
[0009] Further, the cross-section of the bent metal sheet is in a "ji" shape.
[0010] Further, an embedding groove corresponding to the contact is opened on the parallel contact piece. The opening depth of the embedding groove is adapted to the thickness of the contact. The convex parts integrally formed on both sides of the embedding groove form a conduction part for conducting heat between the parallel contact piece and the main circuit contact piece. When the contact is correspondingly embedded into the embedding groove of the parallel contact piece, through the close abutting fit between the convex parts on both sides of the embedding groove and the main circuit contact piece, heat can be conducted between the parallel contact piece and the main circuit contact piece.
[0011] Further, the parallel contact piece is a metal sheet structure with heat conduction performance and electrical conductivity, so that a parallel electrical connection structure is formed between the parallel contact piece and the main circuit contact piece and heat can be conducted between them.
[0012] Further, the fastener is a screw. A screw hole for the screw to pass through is opened on the contact of the electrical component. The main circuit contact piece, the contact, and the parallel contact piece are locked and fixed by the screw.
[0013] Based on the same inventive concept, the present invention also provides a control device, which is a high-voltage control box or a high-voltage distribution box for an electric vehicle high-voltage circuit system, and includes the electrical connection structure of the electrical component contact described in any one of the above.
[0014] The above technical solution has the following advantages or beneficial effects:
[0015] In the electrical connection structure and control device of the electronic component contacts described in the present invention, the main circuit contact piece is in abutment with the first contact surface of the contact of the electronic component, and at the same time, the parallel contact piece is in abutment with the second contact surface of the contact, so that the main circuit contact piece and the parallel contact piece correspond to each other up and down, and a conduction part is arranged between the main circuit contact piece and the parallel contact piece, and the main circuit contact piece and the parallel contact piece can transfer heat to each other through the conduction part. In this way, the heat dissipation area at the connection part between the main circuit contact piece and the contact is effectively improved by the additional parallel contact piece, that is, the parallel contact piece is added at the electrical connection position to increase the local heat conduction cross-sectional area and heat dissipation area, and at the same time increase the mass at the heat source, improve mc, and then effectively reduce the temperature at the heat source, so as to better meet the thermal management requirements of the product under high current. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the three-dimensional structure decomposition of the electrical connection structure of the first embodiment of the present invention.
[0017] Figure 2 It is a cross-sectional view of the matching structure of the electrical connection structure of the first embodiment of the present invention.
[0018] Figure 3 It is a schematic diagram of the three-dimensional structure decomposition of the electrical connection structure of the second embodiment of the present invention.
[0019] Figure 4 It is a cross-sectional view of the matching structure of the electrical connection structure of the second embodiment of the present invention.
[0020] Figure 5 It is a schematic diagram of the three-dimensional structure decomposition of the electrical connection structure of the third embodiment of the present invention.
[0021] Figure 6 It is a cross-sectional view of the matching structure of the electrical connection structure of the third embodiment of the present invention.
[0022] Figure 7 The present invention is a schematic diagram of the three-dimensional structure decomposition of the electrical connection structure of the electronic component contact in the prior art.
[0023] Figure 8 It is a cross-sectional view of the matching structure of the electrical connection structure of the electronic component contact in the prior art.
[0024] Description of labels:
[0025] 1. Fasteners, 2. Main circuit contacts, 3. Parallel contacts, 4. Thermally conductive pads, 5. Bent metal sheets, 6. Electronic components, 31. Extension, 32. Embedding groove, 33. Protrusion, 61. Contacts. DETAILED DESCRIPTION
[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0027] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0028] Embodiment 1
[0029] Please refer to the attached Figure 1 An embodiment of the present invention provides an electrical connection structure of electronic component contacts, including a fastener 1, a main circuit contact 2 and a parallel contact 3 with thermal conductivity, the contact 61 of the electronic component 6 has a first contact surface and a second contact surface that are opposite to each other, at least the main circuit contact 2 is tightly matched with the first contact surface of the contact 61 through the fastener 1, and the parallel contact 3 is configured to be tightly placed on the second contact surface of the contact 61, and a conduction part for conducting heat between the parallel contact 3 and the main circuit contact 2 is provided between the parallel contact 3 and the main circuit contact 2. It can be understood that, in the present embodiment, the main circuit contact piece 2 is in abutment with the first contact surface of the contact 61 of the electronic component 6, and at the same time, the parallel contact piece 3 is in abutment with the second contact surface of the contact 61, so that the main circuit contact piece 2 and the parallel contact piece 3 correspond to each other up and down, and a conduction part is arranged between the main circuit contact piece 2 and the parallel contact piece 3, and the main circuit contact piece 2 and the parallel contact piece 3 can transfer heat to each other through the conduction part. In this way, the heat dissipation area at the connection part between the main circuit contact piece 2 and the contact 61 is effectively improved by the additional parallel contact piece 3, that is, the parallel contact piece 3 is added at the electrical connection position to increase the local heat conduction cross-sectional area and heat dissipation area, and at the same time, the mass at the heat source (electrical connection) is increased, and mc (specific heat capacity formula: Q=mcΔt) is improved, so as to effectively reduce the temperature at the heat source, so as to better meet the thermal management requirements of the product under high current. In addition, one of the focuses of the present application is to solve the problem of mismatched current carrying capacity between the main circuit contacts (large terminals) and the electronic component contacts (small terminals). Because the current carrying area of the electronic component part is small, when the current increases, it is easy to cause the local temperature of the electronic component contact to be too high. The parallel contacts can increase the current carrying capacity of the double-layer parallel connection. At the same time, the parallel contacts can be sized as needed according to actual conditions. They are easy to produce and can be easily combined into the existing fixed structure of the main circuit contacts and electronic component contacts.
[0030] Please refer to the attached Figure 1 , Attachment Figure 2In one preferred embodiment, the contact mating surface corresponding to the parallel contact piece 3 and the contact 61 is a planar structure, and the parallel contact piece 3 has an extension portion 31 extending toward both sides relative to the contact 61, and a spacing space is formed between the two extension portions 31 and the main circuit contact piece 2, and a conduction portion is provided in each of the two spacing spaces. In one preferred embodiment, the conduction portion is a thermally conductive adhesive pad 4 with thermal conductivity. In this way, the contact 61 is clamped in the middle by the main circuit contact piece 2 and the parallel contact piece 3, and the two thermally conductive adhesive pads 4 are distributed on both sides of the contact 61 and padded between the main circuit contact piece 2 and the parallel contact piece 3. The thermally conductive adhesive pad 4 can not only conduct heat, but also absorb assembly tolerances, which can effectively improve the stability of the electrical connection.
[0031] Please refer to the attached Figure 1 , Attachment Figure 2 In one preferred embodiment, the fastener 1 is a screw, and a nail hole for the screw to pass through is provided on the contact 61 of the electronic component 6, and the main circuit contact piece 2, the contact 61 and the parallel contact piece 3 are locked and fixed by screws. However, those skilled in the art should understand that in other embodiments, the parallel contact piece 3 can also be integrally connected and fixed to the bottom shell of the device (not shown) and after the electronic component 6 is installed in place, the parallel contact piece 3 and the contact surface at the bottom of the contact 61 of the electronic component 6 are tightly in contact, and the main circuit contact piece 2 and the contact 61 are locked and fixed by the fastener 1, so that the main circuit contact piece 2 and the contact 61 are tightly in contact with each other.
[0032] In addition, an embodiment of the present invention further provides a control device, which is a high-voltage control box or a high-voltage distribution box for a high-voltage circuit system of an electric vehicle, and includes an electrical connection structure of electronic component contacts of any of the above embodiments.
[0033] Embodiment 2
[0034] Please refer to the attached Figure 3 , Attachment Figure 4 The difference between this embodiment and the first embodiment is that the parallel contact piece 3 and the conducting part are metal parts with thermal conductivity and electrical conductivity, and the material of the metal parts structure can be a metal material with both thermal conductivity and electrical conductivity, such as copper or aluminum.
[0035] Please refer to the attached Figure 3 , Attachment Figure 4In one preferred embodiment, the conducting part is a bent metal sheet 5 with elastic deformation performance. The bent metal sheet 5 is configured to elastically abut between the parallel contact sheet 3 and the main circuit contact sheet 2, so that a parallel electrical connection structure is formed between the parallel contact sheet 3 and the main circuit contact sheet 2 and heat can be conducted to each other. The so-called parallel electrical connection structure means that the main circuit contact sheet 2 is electrically connected to the contact 61, and the parallel contact sheet 3 is also electrically connected to the contact 61. At the same time, the main circuit contact sheet 2 and the parallel contact sheet 3 are connected through two bent metal sheets 5, so that a parallel structure is formed between the main circuit contact sheet 2 and the parallel contact sheet 3. In this way, the current-carrying area of the component contact is increased, thereby increasing the current carrying capacity of the circuit. At the same time, the heat dissipation area of the electrical connection is increased, and the heat dissipation effect is improved, so as to better meet the thermal management requirements of the product under high current. In addition, the bent metal sheet 5 can also absorb the assembly tolerance and effectively improve the stability of the electrical connection.
[0036] Please refer to the attached Figure 3 , Attachment Figure 4 In one preferred embodiment, the cross section of the bent metal sheet 5 is in the shape of a Chinese character "J". However, those skilled in the art should understand that in other embodiments, the cross section of the bent metal sheet 5 may also be in the shape of a "W" or a wave, and is not limited to the specific implementation disclosed in this embodiment.
[0037] Embodiment 3
[0038] Please refer to the attached Figure 5 , Attachment Figure 6 The difference between this embodiment and the first embodiment is that an embedding groove 32 corresponding to the contact 61 is provided on the parallel contact piece 3, the depth of the embedding groove 32 is adapted to the thickness of the contact 61, and the convex parts 33 integrally formed on both sides of the embedding groove 32 form a conduction part for conducting heat between the parallel contact piece 3 and the main circuit contact piece 2. When the contact 61 is correspondingly embedded in the embedding groove 32 of the parallel contact piece 3, the convex parts 33 on both sides of the embedding groove 32 are closely abutted against the main circuit contact piece 2, so that heat can be mutually conducted between the parallel contact piece 3 and the main circuit contact piece 2.
[0039] Please refer to the attached Figure 5 , Attachment Figure 6 In one preferred embodiment, the parallel contact piece 3 is preferably a metal sheet structure with thermal conductivity and electrical conductivity, so that a parallel electrical connection structure is formed between the parallel contact piece 3 and the main circuit contact piece 2 and heat can be conducted to each other.
[0040] As described above, the embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements do not deviate the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
Claims
1. An electrical connection structure for electronic component contacts, characterized in that: It includes a fastener (1), a main circuit contact piece (2) and a parallel contact piece (3) having at least heat conduction performance. The contact head (61) of the electronic component (6) has a first contact surface and a second contact surface that are opposite to each other. At least the main circuit contact piece (2) is in close fit with the first contact surface of the contact head (61) through the fastener (1), while the parallel contact piece (3) is configured to be closely attached to the second contact surface of the contact head (61), and a conduction part for conducting heat between the parallel contact piece (3) and the main circuit contact piece (2) is provided between the parallel contact piece (3) and the main circuit contact piece (2).
2. The electrical connection structure of electronic component contacts according to claim 1, characterized in that: The contact mating surface of the parallel contact piece (3) corresponding to the contact head (61) is a planar structure. The parallel contact piece (3) has extension parts (31) extending towards both sides relative to the contact head (61). A spaced space is respectively formed between the two extension parts (31) and the main circuit contact piece (2), and a conduction part is respectively arranged in the two spaced spaces.
3. The electrical connection structure of electronic component contacts according to claim 2, characterized in that: The conduction part is a heat-conducting gasket (4) having heat conduction performance.
4. The electrical connection structure of electronic component contacts according to claim 2, characterized in that: The parallel contact piece (3) and the conduction part are metal piece structures having heat conduction performance and electrical conductivity.
5. The electrical connection structure of electronic component contacts according to claim 4, characterized in that: The conduction part is a bent metal sheet (5) having elastic deformation performance. The bent metal sheet (5) is configured to be elastically abutted between the parallel contact piece (3) and the main circuit contact piece (2), so that a parallel electrical connection structure is formed between the parallel contact piece (3) and the main circuit contact piece (2) and heat can be conducted between them.
6. The electrical connection structure of electronic component contacts according to claim 5, characterized in that: The cross section of the bent metal sheet (5) is in a "ji" shape.
7. The electrical connection structure of electronic component contacts according to claim 1, characterized in that: An embedding groove (32) corresponding to the contact head (61) is formed on the parallel contact piece (3). The opening depth of the embedding groove (32) is adapted to the thickness of the contact head (61). The convex parts (33) integrally formed on both sides of the embedding groove (32) form a conduction part for conducting heat between the parallel contact piece (3) and the main circuit contact piece (2). When the contact head (61) is correspondingly embedded into the embedding groove (32) of the parallel contact piece (3), through the close abutting fit between the convex parts (33) on both sides of the embedding groove (32) and the main circuit contact piece (2), heat can be conducted between the parallel contact piece (3) and the main circuit contact piece (2).
8. The electrical connection structure of electronic component contacts according to claim 7, characterized in that: The parallel contact piece (3) is a metal sheet structure having heat conduction performance and electrical conductivity, so that a parallel electrical connection structure is formed between the parallel contact piece (3) and the main circuit contact piece (2) and heat can be conducted between them.
9. The electrical connection structure of electronic component contacts according to any one of claims 1 to 8, characterized in that: The fastener (1) is a screw. A screw hole for the screw to pass through is formed on the contact head (61) of the electronic component (6). The main circuit contact piece (2), the contact head (61) and the parallel contact piece (3) are locked and fixed by the screw.
10. A control device, characterized in that: The control device is a high-voltage control box or a high-voltage distribution box for an electric vehicle high-voltage circuit system, and includes the electrical connection structure of the electronic component contact head according to any one of claims 1 to 9.