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CN-224234039-U - Heat dissipation unit and busbar assembly

CN224234039UCN 224234039 UCN224234039 UCN 224234039UCN-224234039-U

Abstract

The present disclosure provides a heat dissipating unit and a busbar assembly. The heat dissipation unit (1) comprises a thermally conductive electrically insulating coating (11) and a thermally conductive element (12), the thermally conductive electrically insulating coating (11) being at least partially coated on one side of the thermally conductive element (12), the thermally conductive electrically insulating coating (11) being composed of an inorganic nonmetallic material. The present disclosure provides a heat dissipation function for a component to be heat-dissipated while having an electrically insulating protective effect.

Inventors

  • WANG YONGGANG

Assignees

  • 罗伯特·博世有限公司

Dates

Publication Date
20260512
Application Date
20250519

Claims (10)

  1. 1. A heat dissipating unit (1), characterized in that the heat dissipating unit (1) comprises a thermally conductive electrically insulating coating (11) and a thermally conductive element (12), the thermally conductive electrically insulating coating (11) being at least partially coated on one side of the thermally conductive element (12), the thermally conductive electrically insulating coating (11) being composed of an inorganic non-metallic material.
  2. 2. The heat dissipating unit (1) according to claim 1, wherein the thermally conductive electrically insulating coating (11) extends beyond the thermally conductive element (12) such that creepage currents on the surface of the thermally conductive electrically insulating coating (11) can be blocked.
  3. 3. The heat dissipating unit (1) according to claim 1, wherein the inorganic non-metallic material comprises graphene or alumina ceramic.
  4. 4. A heat dissipating unit (1) according to claim 3, characterized in that, in case the inorganic non-metallic material comprises graphene, the thermally conductive electrically insulating coating (11) is formed from graphene and a nano-ceramic suspension via electromagnetic deposition.
  5. 5. The heat dissipating unit (1) according to claim 1, wherein the heat conducting element (12) is capable of absorbing mounting tolerances of the element to be heat dissipated, the heat conducting element (12) being a heat conducting pad, the heat conducting pad being composed of silicone, polyurethane or acrylate.
  6. 6. A busbar assembly (100), characterized in that the busbar assembly (100) comprises a heat dissipating unit (1) according to any one of claims 1 to 5, a busbar (2) and a housing (3), the busbar (2) being arranged on the housing (3) via the heat dissipating unit (1), the heat conducting element (12) being for absorbing mounting tolerances of the busbar (2) and the housing (3).
  7. 7. The busbar assembly (100) according to claim 6, wherein the thermally conductive electrically insulating coating (11) is applied between the thermally conductive element (12) and the housing (3) and/or the thermally conductive electrically insulating coating (11) is applied between the busbar (2) and the thermally conductive element (12).
  8. 8. The busbar assembly (100) according to claim 7, wherein the busbar (2) comprises a fitting portion (21), the busbar (2) being fitted to the housing (3) via the fitting portion (21), the thermally conductive and electrically insulating coating (11) being further coated on a side face and an outer end face of the fitting portion (21).
  9. 9. The busbar assembly (100) according to claim 6, wherein the housing (3) is configured with a boss (31), the thermally conductive element (12) is arranged on the boss (31), and the boss (31) extends beyond the thermally conductive element (12).
  10. 10. The busbar assembly (100) of claim 9, wherein the boss (31) is configured with a rib for limiting the mounting position of the thermally conductive element (12).

Description

Heat dissipation unit and busbar assembly Technical Field The present disclosure relates to the field of heat dissipation, and in particular, to a heat dissipating unit and a busbar assembly. Background This section is intended to provide background information related to understanding the various techniques described herein. As implied by the headings in this section, this is a discussion of the related art that should not be implied in any way. Accordingly, it should be understood that any statement in this section should be read from this perspective and not as an admission of prior art. In electrically driven products, large currents often occur in the bus bar. In order to protect the heat sensitive components, some heat dissipation method is generally required to cool the bus bars. In some embodiments known to the applicant, it employs a technical route of bus bars + thermal pads + insulating paper + housing. The primary function of the thermal pad is, among other things, to fill the gap and transfer heat from the busbar to the housing, and the primary function of the insulating paper is to provide an electrically insulating layer. In other embodiments, a busbar + thermal pad + housing approach is used. The heat conducting pad has a larger size to meet the creepage distance requirement. However, this technical route has the risk that the uncompressed heat conducting pad may crack when subjected to vibration loads. In addition, compared with the thermal conductivity of these materials, the thermal conductivity of the insulating paper is low, resulting in poor heat dissipation performance. Disclosure of utility model According to a different aspect, the present disclosure aims to provide a heat dissipation function for a component to be heat-dissipated while having an electrically insulating protective effect. Further, it is an object of the present disclosure to solve or at least alleviate one or more of the problems of the prior art. The present disclosure solves the above-mentioned problems by providing a heat dissipating unit and a busbar assembly, in particular, according to an aspect of the present disclosure, there is provided: a heat dissipating unit, wherein the heat dissipating unit comprises a thermally conductive electrically insulating coating and a thermally conductive element, the thermally conductive electrically insulating coating being at least partially coated on one side of the thermally conductive element, the thermally conductive electrically insulating coating being composed of an inorganic nonmetallic material. Optionally, according to an embodiment of the present disclosure, the thermally conductive electrically insulating coating extends beyond the thermally conductive element such that creepage currents on a surface of the thermally conductive electrically insulating coating can be blocked. Optionally, according to an embodiment of the present disclosure, the inorganic nonmetallic material comprises graphene or alumina ceramic. Alternatively, in accordance with one embodiment of the present disclosure, where the inorganic nonmetallic material includes graphene, the thermally conductive electrically insulating coating is formed from graphene and a nanoceramic suspension via electromagnetic deposition. Optionally, according to an embodiment of the present disclosure, the heat conducting element is capable of absorbing mounting tolerances of the element to be heat-dissipated, the heat conducting element is a heat conducting pad, and the heat conducting pad is composed of silicone, polyurethane or acrylate. According to another aspect of the present disclosure, there is provided a busbar assembly, wherein the busbar assembly includes any one of the heat dissipating units described above, a busbar arranged on the housing via the heat dissipating unit, and a housing, the heat conducting element being for absorbing mounting tolerances of the busbar and the housing. Optionally, according to one embodiment of the present disclosure, the thermally conductive electrically insulating coating is applied between the thermally conductive element and the housing, and/or the thermally conductive electrically insulating coating is applied between the busbar and the thermally conductive element. Optionally, according to an embodiment of the present disclosure, the busbar includes a fitting portion via which the busbar is fitted to the housing, and the thermally conductive and electrically insulating coating is further coated on a side surface and an outer end surface of the fitting portion. Optionally, according to one embodiment of the present disclosure, the housing is configured with a boss on which the thermally conductive element is arranged and which extends beyond the thermally conductive element. Optionally, according to an embodiment of the present disclosure, the boss is configured with a rib for limiting a mounting position of the heat conductive element. Drawings The above and other f