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Power transmission device and power transmission system

A technology of a power receiving device and a power transmission coil, which is applied in the fields of power transmission systems and power transmission devices, can solve problems such as biological health problems, and achieve the effect of reducing detection dead ends.

Pending Publication Date: 2022-07-26
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if there are objects such as living organisms and metal pieces in the vicinity of the power transmission coil, various problems may arise
For example, if there is a living body near the power transmission coil, the living body may be exposed to the electromagnetic field generated during power transmission, which may cause health problems

Method used

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  • Power transmission device and power transmission system
  • Power transmission device and power transmission system
  • Power transmission device and power transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0036] The power transmission system of the present embodiment can be used for charging secondary batteries of various devices such as EVs (Electric Vehicles), mobile devices such as smartphones, and industrial devices. Hereinafter, a case where the power transmission system performs charging of the battery of the EV is exemplified.

[0037] figure 1 This is a diagram showing a schematic configuration of a power transmission system 1000 for charging the battery 500 included in the electric vehicle 700 . The electric vehicle 700 travels with a motor driven by electric power charged to a battery 500 such as a lithium ion battery or a lead storage battery as a power source. The electric vehicle 700 is an example of a moving body.

[0038] like figure 1 As shown, the power transmission system 1000 is a system that wirelessly transmits power from the power transmission device 200 to the power reception device 300 by magnetic coupling. The power transmission system 1000 includes...

Embodiment approach 2

[0084] In Embodiment 1, an example in which the detection ranges of the plurality of sensors 120 hardly overlap has been described. In the present embodiment, an example in which the detection ranges of the plurality of sensors 120 overlap in a wide range will be described. In addition, about the same structure and process as Embodiment 1, description is abbreviate|omitted or simplified.

[0085] Figure 8 This is an arrangement diagram of eight sensor modules 110 included in the object detection apparatus 100 of the present embodiment. In the present embodiment, the plurality of sensors 120 are composed of four pairs of sensors 120 whose detection ranges 115 overlap each other. The four pairs of sensors 120 are two sensors 120 arranged at both ends of each of the four sides constituting the outer edge of the power transmission coil unit 210 .

[0086] Specifically, the sensor 120 included in the sensor module 110A arranged at one end of the side corresponding to the straig...

Embodiment approach 3

[0102] In Embodiments 1 and 2, an example in which the power transmission coil unit 210 has a substantially quadrangular shape when viewed from the first direction has been described. In the present embodiment, an example in which the power transmission coil unit 210A has a substantially hexagonal shape when viewed from the first direction will be described. In addition, about the same structure and process as Embodiment 1, 2, description is abbreviate|omitted or simplified.

[0103] Figure 10 This is an arrangement diagram of six sensor modules 110 included in the object detection device 100 of the present embodiment. In the present embodiment, the outer edge of the power transmission coil unit 210A has a substantially hexagonal shape when viewed from the first direction. The outer edge of the power transmission coil unit 210A is actually the outer edge of the housing 214A included in the power transmission coil unit 210A. The substantially hexagon has six sides including...

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Abstract

The purpose of the present invention is to reduce detection dead angles in the vicinity of a power transmission coil in object detection in accordance with wireless power transmission. A power transmission coil unit (210) has a power transmission coil formed by winding a conductive wire around a coil axis extending in a first direction. Each of the plurality of sensor modules (110) has a sensor having a detection range (115) in which a detection angle spread in an in-plane direction of a first plane orthogonal to the first direction is a first angle. When viewed from the first direction, the plurality of sensors are disposed in a surrounding region (215) which is a region surrounding the power transmission coil unit (210) along the outer edge of the power transmission coil unit (210). When viewed from the first direction, each of the plurality of sensors is disposed such that a second angle, which is an angle formed by a straight line overlapping the detection range (115) among a plurality of straight lines (216) constituting the outer edge of the power transmission coil unit (210) and the central axis of the detection range (115), is equal to or less than half of the first angle.

Description

technical field [0001] The present disclosure relates to a power transmission device, and a power transmission system. Background technique [0002] A wireless power transmission technology that wirelessly transmits electric power is attracting attention. Wireless power transmission technology can wirelessly transmit power from a power transmitting device to a power receiving device, so it is expected to be applied to various products such as electric trains, electric vehicles and other transportation equipment, home appliances, wireless communication equipment, and toys. In the wireless power transmission technology, in order to transmit power, a power transmission coil and a power reception coil coupled by magnetic flux are used. [0003] However, if there are objects such as living bodies and metal pieces in the vicinity of the power transmission coil, various problems may arise. For example, when there is a living body in the vicinity of the power transmission coil, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/10H02J50/60H02J7/00B60L53/122B60L53/35
CPCH02J50/10H02J50/60H02J7/00B60L53/122B60L53/35B60L53/124H02J50/80B60L53/39B60L53/126
Inventor 伊井彰宏
Owner TDK CORPARATION