On-board module (CPM) for inductive charging system of vehicle
By introducing heat pipes into the onboard module of the induction vehicle charging system, the problem of poor heat dissipation is solved, and more efficient heat conduction and heat dissipation effect is achieved.
Patent Information
- Application Number
- CN202380083578.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-12-20
- Filing Date
- 2023-12-12
- Publication Date
- 2025-07-01
AI Technical Summary
The onboard modules of the existing induction vehicle charging systems have problems with poor heat dissipation during energy conversion operations, especially in the absence of active components such as fans.
The heat pipe is introduced into the vehicle panel module to distribute locally generated heat into the module and/or the housing to improve the heat dissipation effect.
Through the distribution of the heat pipe, heat can be evenly transmitted, and the heat transfer efficiency from the vehicle board module to the environment can be improved, avoiding dependence on the fan.
Smart Images
Figure CN120239662A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an on-vehicle board module (CPM) for an inductive charging system for a vehicle. Background Art
[0002] As is well known, an inductive charging system for a vehicle generally includes a ground module (ground board module, GPM) fixed to the ground and connected to the power grid, and an on-vehicle module (on-vehicle board module, CPM) generally arranged on the lower side of the vehicle. Generally, in such an inductive charging system, energy is inductively transferred through a primary coil of the ground board module (GPM) to a primary coil of the on-vehicle board module (CPM) arranged in the vehicle for charging a storage unit / battery and / or for powering an electrical load. The ground board module (GPM) and the on-vehicle board module (CPM) can also be configured for bidirectional energy transfer, i.e., from the GPM to the CPM and from the CPM to the GPM.
[0003] The GPM and the CPM generally both include electronic components and a primary coil assembly having a primary coil. To achieve an optimal electromagnetic coupling of the two primary coils for energy transfer, the primary coil of the GPM and the primary coil of the CPM must be optimally positioned relative to each other.
[0004] During operation, i.e., during energy transfer from the primary coil to the primary coil, heat is mainly generated in two areas in the GPM and the CPM: (a) in the respective electronic components, where a large amount of heat is generated relatively concentrated at certain positions with a high local heat density, and (b) in the respective primary coil assemblies (primary coil and ferrite), where less heat is generated relative to the electronic components and the distribution is relatively good. The electronic components generally include power electronic devices. Summary of the Invention
[0005] An object of the present invention is to improve the heat dissipation of an on-vehicle board module (CPM) from an inductive vehicle charging system without active components such as a fan.
[0006] The present invention results from the features of the independent claims. Advantageous improvements and embodiments are the subject matter of the dependent claims. Other features, applications, and advantages of the present invention will become apparent from the following description and the discussion of the exemplary embodiments of the present invention depicted in the figures.
[0007] A first aspect of the present invention relates to a vehicle-mounted board module (CPM) for converting electromagnetic energy of an electromagnetic field generated by a ground board module (GPM) of an inductive vehicle charging system into electrical energy in the form of an electric current, wherein the vehicle-mounted board module (CPM) has at least one primary coil for converting the electromagnetic field into alternating current AC. The vehicle-mounted board module (CPM) is characterized in that one or more heat pipes are arranged in the vehicle-mounted board module (CPM) such that heat locally generated within the vehicle-mounted board module (CPM) during an energy conversion operation is distributed within the vehicle-mounted board module (CPM) and / or in a housing of the vehicle-mounted board module (CPM).
[0008] Thus, during an energy conversion operation, heat locally generated in the CPM is guided by the heat pipes to regions of the CPM with lower local heat generation, such that the generated heat is distributed as evenly as possible within the CPM or in the housing of the CPM. This enables improved heat transfer from the CPM to the environment and thus, in particular, eliminates the need for a fan for local cooling of "hot spots" of heat in the CPM.
[0009] The term "heat pipe" refers to a heat exchanger that allows for a high heat flux density by utilizing the enthalpy of evaporation of a medium. In this way, a large amount of heat transfer can be carried out with a small cross-sectional area. A basic distinction is made between two types of heat pipes: the so-called "heat pipe" and the so-called "two-phase thermosyphon". The basic operating principle of both designs is the same; the difference lies in the return transport of the gaseous working fluid to the evaporator, i.e., to the point where heat is supplied. In both designs, the return transport is passive and thus without any auxiliary means such as a circulation pump.
[0010] At the operating temperature, the thermal resistance of a heat pipe is significantly lower than that of a metal. Thus, the behavior of a heat pipe is very close to an isothermal change of state. Along the length of the heat pipe, the temperature is almost constant. With the same heat transfer capacity, a significantly lighter design can be achieved under the same operating conditions compared to a conventional heat exchanger. By carefully selecting the working fluid of the heat pipe, an operating temperature from a few Kelvin to approximately 3,000 Kelvin can be achieved.
[0011] The energy transport capacity of a heat pipe depends to a large extent on the specific enthalpy of evaporation of the working fluid (in kJ / mol or kJ / kg) and not on the thermal conductivity of the container wall or the working fluid. For efficiency reasons, heat pipes typically operate at a hot end just above the boiling temperature of the working fluid and a cold end just below it.
[0012] In an embodiment of the proposed vehicle-mounted board module (CPM), only a primary coil assembly with a primary coil is arranged in the housing of the CPM. In this embodiment, in particular, an electronic assembly with power electronics is designed as an additional external device.
[0013] In an alternative embodiment of the proposed in-vehicle board module (CPM), a main coil assembly having a main coil and an electronic assembly for converting alternating current (AC) into direct current (DC) are both arranged in the housing of the CPM.
[0014] Advantageously, one or more heat pipes each having a corresponding pipe length L are arranged relative to each other such that directly adjacent heat pipes are spaced apart by a distance D, where the range of the distance D is as follows: 3 < L / D < 10. This indicates that the distance D of the heat pipes is optimal such that a sufficient number of heat pipes are available for a substantially uniform temperature distribution within the CPM.
[0015] Advantageously, in a region of the in-vehicle board module (CPM) that has high local heating (so-called thermal "hotspots") during energy conversion operation, the spatial density of the heat pipe arrangement is higher (the distance between directly adjacent heat pipes is smaller) than in a region of the in-vehicle board module (CPM) that has low local heating.
[0016] Advantageously, at least a portion of the plurality of heat pipes are arranged in two or more parallel planes within the in-vehicle board module (CPM). It is assumed that the heat pipes are designed such that their longitudinal extension extends in one plane. They can be designed as straight or curved. Advantageously, at least a portion of the plurality of heat pipes are arranged in at least two non-parallel planes within the in-vehicle board module (CPM). Advantageously, at least a portion of the plurality of heat pipes are arranged in two or more non-parallel planes within the in-vehicle board module (CPM).
[0017] Advantageously, at least one heat pipe is arranged in the housing material of the CPM housing or is arranged directly on the housing.
[0018] An advantageous embodiment of the in-vehicle board module (CPM) is characterized in that the housing of the CPM has a thermal interface (e.g., a mechanical connection of the CPM to the vehicle) in at least one region for coupling an external radiator (e.g., a body or a heat exchanger connected to the cooling circuit of the vehicle, etc.), and wherein one or more heat pipes are in thermally conductive contact with the thermal interface. Via this thermal interface, additional heat from the CPM is transferred to the environment, advantageously to a radiator in / on the vehicle in this case.
[0019] The main coil of the CPM advantageously includes at least one coil wire arranged in a predetermined geometry as a coil wire structure. In particular, the main coil of the CPM is designed as a flat coil.
[0020] Advantageously, the material adjacent to the main coil is a ferromagnetic or ferrimagnetic material.
[0021] Advantageously, at least one section of at least one heat pipe is arranged substantially uniformly above and / or below at least one section of the coil wire. This allows the heat generated in the coil wire to be directly transferred to the heat pipe and distributed in the CPM through the heat pipe.
[0022] If the coil wire density increases in at least one area of the CPM where the coil wire is arranged, then advantageously, the density of the sections of multiple heat pipes arranged in this area is higher than the density in other areas of the coil wire structure with a low coil wire density.
[0023] Advantageously, the main coil consists of at least one coil wire, and the main coil has at least one area where the coil wire density increases. In this area, the density of the sections of multiple heat pipes (103) arranged is higher than the density in other areas of the main coil.
[0024] Advantageously, a section of one heat pipe or corresponding sections of multiple heat pipes are arranged above and / or below the coil wire structure in the intermediate area between each coil wire winding.
[0025] Advantageously, at least one coil wire of the coil wire structure is arranged / wound only in one coil wire plane, and at least one heat pipe or multiple heat pipes are arranged parallel to the coil wire plane.
[0026] Advantageously, at least one heat pipe is arranged along the coil wire wound around the coil wire.
[0027] Advantageously, the at least one coil wire is wound around at least a part of at least one heat pipe.
[0028] In an advantageous embodiment, the at least one coil wire is designed as a heat pipe.
[0029] Advantageously, the main coil of the main coil assembly of the CPM is embedded in a first heat-conducting material. Advantageously, the power electronic devices of the electronic assembly of the CPM are embedded in a second heat-conducting material, and the second heat-conducting material is thermally connected to the first heat-conducting material.
[0030] Advantageously, the housing of the CPM is made of a material with a thermal conductivity λ > 100 W / ( ), in particular a material with a thermal conductivity λ > 150 W / ( ).
[0031] Advantageously, the housing of the CPM has a structured outer surface that is in thermal contact with one or more heat pipes.
[0032] A second aspect of the present invention relates to an inductive charging system for a vehicle, for charging an electrical storage device of the vehicle and / or for powering an electrical device, having at least one ground plate module (GPM) and one vehicle-mounted plate module (CPM), wherein energy is transferred at least from the ground plate module (GPM) to the vehicle-mounted plate module (CPM), and wherein the vehicle-mounted plate module (CPM) is designed as described above.
[0033] A third aspect of the present invention relates to a vehicle having a vehicle-mounted plate module (CPM) as described above. Description of the Drawings
[0034] Further advantages, features and details will be apparent from the following description, in which at least one exemplary embodiment is described in detail, optionally with reference to the drawings. Identical, similar and / or functionally identical parts have the same reference numerals.
[0035] In the drawings: Figure 1 A schematic diagram of a vehicle-mounted plate module (CPM) having a creative main coil assembly is shown, and Figure 2 A schematic diagram of a vehicle-mounted plate module (CPM) having a creative main coil assembly and electronic components is shown. Detailed Description of the Invention
[0036] Figure 1 A schematic diagram of a vehicle-mounted plate module (CPM) according to the present invention is shown, which is used to convert the electromagnetic energy of the electromagnetic field generated by the ground plate module (GPM) of the inductive vehicle charging system into electrical energy of current. The vehicle-mounted plate module (CPM) exactly has a main coil assembly 101, and the main coil assembly 101 has a main coil 102 for converting the electromagnetic field into alternating current AC. In the vehicle-mounted plate module (CPM), thirteen heat pipes 103 are arranged above the main coil 102, so that the heat locally generated in the vehicle-mounted plate module (CPM) during the energy conversion operation (generated in the main coil in this case) is distributed in the housing of the vehicle-mounted plate module (CPM). For this purpose, the heat pipes 103 are arranged in thermally conductive contact with the housing above the main coil 102.
[0037] Advantageously, the main coil 102 consists of at least one coil wire, and the main coil 102 has at least one region with an increased coil wire density. In this region, the density of the sections of a plurality of heat pipes 103 arranged is higher than the density arranged in other regions above / below the main coil.
[0038] Advantageously, one or more heat pipes 103 are arranged above and / or below the main coil 102.
[0039] Advantageously, the heat pipe 103 is arranged in one or more planes, which are advantageously arranged parallel to the main coil plane of the main coil 102.
[0040] Advantageously, at least one heat pipe 103 is arranged along the coil wire of the main coil 102, around which the main coil 102 is wound.
[0041] Advantageously, the main coil 102 consists of at least one coil wire, which is designed as a heat pipe 103.
[0042] Figure 2 A schematic diagram of a vehicle-mounted board module (CPM) according to the present invention is shown, which has a main coil assembly and an electronic assembly including power electronics. During the energy conversion operation, the heat locally generated in the main coil and the power electronics is distributed substantially uniformly in the relevant housing area by Figure 2 the heat pipe 103 shown, which is in turn thermally connected to the housing of the CPM, so that optimal heat transfer to the environment can be achieved via the object of the vehicle-mounted board module (CPM).
[0043] Although the present invention has been shown and described in further detail by preferred exemplary embodiments, the present invention is not limited to the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the present invention. Therefore, it is obvious that there are various possible changes. It is also clear that the exemplary embodiments are actually only examples, and these examples should not be construed in any way as limiting the scope, applicability or configuration of the present invention. On the contrary, the foregoing description and the description of the drawings enable those skilled in the art to implement the exemplary embodiments, and these people can make various changes, such as regarding the functions or arrangements of the various elements cited in the exemplary embodiments, without departing from the scope defined by the claims and their legal equivalents, such as the broader interpretation in the specification.
[0044] List of reference numerals 101 Main coil assembly 102 Main coil 103 Heat pipe 104 Electronic assembly
Claims
1. A vehicle-mounted board module (CPM) for converting electromagnetic energy of an electromagnetic field generated by a ground board module (GPM) of an inductive vehicle charging system into electrical energy in the form of current, wherein, The in-vehicle board module (CPM) has at least one primary coil assembly (101), and the at least one primary coil assembly (101) has a primary coil (102) for converting the electromagnetic field into alternating current AC. It is characterized in that one or more heat pipes (103) are arranged in the in-vehicle board module (CPM) such that the heat locally generated within the in-vehicle board module (CPM) during the energy conversion operation is distributed within the in-vehicle board module (CPM) and / or in the housing of the in-vehicle board module (CPM).
2. The in-vehicle board module (CPM) according to claim 1, It is characterized in that One or more of the heat pipes (103) are arranged relative to each other such that directly adjacent heat pipes are spaced apart by a distance D, where the respective pipe length of the heat pipes (103) is L, and the ranges of the distance D and L are: 3 < L / D < 10.
3. The in-vehicle board module (CPM) according to any one of claims 1 to 2, It is characterized in that, In the region of the in-vehicle board module (CPM) that has high local heat generation during the energy conversion operation, the density of the arrangement of the heat pipes (103) is higher than the density of the arrangement in the region of the in-vehicle board module (CPM) that has low local heat generation, that is, the distance between directly adjacent heat pipes is smaller.
4. The in-vehicle board module (CPM) according to any one of claims 1 to 3, Characterized in that, The housing of the in-vehicle board module (CPM) has a thermal interface for coupling an external radiator in at least one region, and one or more of the heat pipes are in thermally conductive contact with the thermal interface.
5. The in-vehicle board module (CPM) according to any one of claims 1 to 4, It is characterized in that The primary coil (102) consists of at least one coil wire, and the primary coil (102) has at least one region where the coil wire density increases. In this region, the density of the arrangement of the sections of a plurality of the heat pipes (103) is higher than the density of the arrangement in other regions of the primary coil.
6. The in-vehicle board module (CPM) according to any one of claims 1 to 5, It is characterized in that The heat pipes (103) are arranged above and / or below the primary coil (102).
7. The in-vehicle board module (CPM) according to any one of claims 1 to 6, It is characterized in that The heat pipes (103) are arranged in one or more planes arranged parallel to the primary coil plane of the primary coil (102).
8. The in-vehicle board module (CPM) according to any one of claims 1 to 5, It is characterized in that At least one of the heat pipes (103) is arranged along the coil wire of the primary coil (102) around which the primary coil (102) is wound.
9. The in-vehicle board module (CPM) according to any one of claims 1 to 7, It is characterized in that The primary coil (102) consists of at least one coil wire, and the at least one coil wire is designed as a heat pipe (103).
10. An inductive charging system for a vehicle, for charging an electrical energy storage device of the vehicle and / or for powering an electrical device, having at least one ground plate module (GPM) and one vehicle plate module (CPM), wherein, Energy is transferred at least from the ground plate module (GPM) to the vehicle-mounted plate module (CPM), and wherein the vehicle-mounted plate module (CPM) is designed as the vehicle-mounted plate module (CPM) according to any one of claims 1 to 9.
11. A vehicle having a vehicle-mounted plate module (CPM) according to any one of claims 1 to 9.