WO2012119288A1 - Vehicular non-contact battery charging apparatus - Google Patents

Abstract

A vehicular non-contact battery charging apparatus comprises an emitting device (131) and a receiving device (160), wherein the emitting device (131) comprises a power source interface (110) for acquiring a power source from a car, a connecting conductor (110), an emitting circuit (139) and an emitting conducting coil (210) that are orderly connected, the receiving device (160) comprises a receiving conducting coil (310), a receiving circuit (159) and a charging circuit (350) that are orderly connected. The problem is avoided that power supply interfaces of hand-held electron devices are not uniform by using the non-contact charging technology, thus the battery of the hand-held electron device can be also charged effectively while its usual functions are realized. Further the bare battery having a wireless charging function can be also charged directly.

Description

 Vehicle contactless battery charging device  Technical field

 The present invention relates to a non-contact charging technology, and more particularly to an in-vehicle non-contact battery charging device.

Background technique

With the continuous development of technology, people are increasingly dependent on electronic products in their daily lives. It is no exception when driving. At present, in-vehicle electronic devices, such as navigators, car DVDs, and hands-free mobile phones, have been widely used. These in-vehicle electronic devices are equipped with corresponding car brackets. The vehicle mount generally implements two functions: a physical support for the in-vehicle electronic device and a supply of power to the in-vehicle electronic device. However, due to the inconsistent power supply interface of mobile phones, navigators and other handheld electronic devices, different electronic devices need to be equipped with different car holders. General on the market The car bracket generally only serves as a physical support and does not provide a power supply interface and charging function.

Non-contact charging or wireless charging has been widely used in many handheld electronic devices. For example, rechargeable electric toothbrushes use contacts for non-contact charging.

There is a charger in the prior art that performs contactless charging of a battery in a mobile electronic device through an inductor. However, the system is complicated and costly, and the wireless charging receiving device is built in the mobile electronic device instead of being integrated in the battery. Such electronic devices need to be specifically designed and lack versatility.

There is also a non-contact charging system in the prior art, mainly in that display technology is used to improve the alignment problem between the receiving device and the transmitting device. It also does not apply to the requirement to charge a bare battery or put it in a mobile electronic device. At the same time, the charging device has no communication mechanism between the charger (transmitting device) and the device to be charged (receiving device), so that the charger cannot adjust the transmitting power of the charger in time according to the state of the device to be charged. In addition, such charging devices are not suitable for use in an in-vehicle environment.

Summary of the invention

 The technical problem to be solved by the present invention is to provide an in-vehicle non-contact battery charging device for the above-mentioned drawbacks of the prior art. By adopting non-contact charging or wireless charging technology, the problem of inconsistent power supply interface of the handheld electronic device is avoided, While the handheld electronic device can achieve normal functions, its battery can also be effectively charged; in addition, the bare battery with wireless charging function can be directly charged.

 The technical solution adopted by the present invention to solve the technical problem thereof is to provide an in-vehicle non-contact battery charging device, including a transmitting device and a receiving device; The transmitting device includes a power interface for sequentially obtaining power from a car, a connecting wire, a transmitting circuit, and a transmitting conductive coil; the receiving device includes a receiving conductive coil, a receiving circuit, and a charging circuit that are sequentially connected.

 Further, the transmitting circuit includes a power input circuit module, a driving circuit module, a transmission impedance matching circuit module, and a control and status display. The circuit module includes: a receiving impedance matching circuit module, a rectifying circuit module, and a voltage stabilizing circuit module.

 Further, the emitting device further includes an emitting surface, and the emitting conductive coil is laid on the emitting surface.

go a step further, The launching device also includes a support platform and/or fixture that secures and supports the receiving device. The fixture can be moved, telescoped, and adjusted to achieve effective fixation and support for different receiving devices.

Further, the receiving device further includes a feedback circuit. Receiving device Through the feedback circuit, the state of the receiving circuit and the battery core is fed back to the transmitting device; by establishing an effective feedback mechanism, the effective transmitting and receiving energy can be achieved to prevent the receiving device or the battery core from being overheated or even burned.

Further, the receiving device is mounted in a battery. It can be realized by installing a receiving device in the battery. Charge the bare battery directly without touching the battery's electrodes while charging.

go a step further, The receiving device is mounted in an electronic device. The receiving device is mounted in the electronic device so that the electronic device can be effectively charged while achieving the usual functions.

The technical solution of the present invention has the following beneficial effects:

1. The vehicle-mounted device described in the present invention can directly implement the bare battery with wireless charging function. By charging, the battery in the electronic device containing the receiving device can be charged.

2 , An effective feedback mechanism is established through the feedback circuit to effectively control the transmission and reception energy, and it can ensure that the receiving device does not passively receive excessive energy, so that the temperature of the receiving device or the battery core is overheated or even burned.

3. The receiving conductive coil adopts a small coil array, which reduces the need for precise alignment of the center of the transmitting conductive coil and the receiving conductive coil to a certain extent.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural view of an embodiment of a vehicle-mounted non-contact battery charging device of the present invention;

2 is a schematic structural diagram of a transmitting device and a receiving device according to an embodiment of the present invention;

3 is a block diagram showing an implementation of a charging device in an embodiment of the present invention;

4 is a functional block diagram of an embodiment of the present invention;

Figure 5 is a diagram showing two different coil implementation forms that can be employed in an embodiment of the present invention;

Figure 6 is a flow chart showing an implementation of an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

 As shown in FIG. 1 , FIG. 2 and FIG. 3 , the in-vehicle non-contact battery charging device of the embodiment includes a transmitting device 131 and a receiving device 160, wherein The transmitting device 131 includes a power interface 100 for obtaining power from the automobile, a connecting wire 110, a transmitting circuit 139, a transmitting conductive coil 210, an emitting surface 140, and a supporting platform 120 and a fixing structure 125 for fixing and supporting the receiving device 160; The receiving device 160 includes a receiving conductive coil 310, a receiving circuit 159, a charging circuit 350, and a feedback circuit 360. The receiving device 160 is mounted in the battery 180 or mounted in the electronic device 170.

The power interface 100 may be in the form of an interface for obtaining power from the car cigarette lighter as shown in FIG. 1 , or may be a power interface preset in the car or other alternative form, and the power interface 100 may be from the automobile. The circuit system obtains the power; the connecting wire 110 connects the power interface 100 to the transmitting circuit 139; the shape of the supporting platform 120 may be an L shape as shown in FIG. 1 or a U-shaped groove or the like which can be used for fixing the receiving device. ; The fixing structure 125 can be moved, telescoped and adjusted to achieve effective fixing and support for different receiving devices. The fixing structure 125 can be a structure as shown in FIG. 1 or a fixed function such as a square card slot structure. structure The emitting surface 140 is a surface of the supporting platform 120, and a transmitting coil 210 and a transmitting circuit 139 are laid on the inner side of the emitting surface 140. The in-vehicle non-contact battery charging device shown in FIG. 1 not only realizes the function of supporting and fixing the handheld electronic device, but also realizes the function of the non-contact battery charging.

 As shown in FIG. 4, FIG. 4 further shows the functional modules included in this embodiment on the basis of FIG. Transmitting circuit 139 includes power input circuit Module 243, drive circuit module 220, transmit impedance matching circuit module 230, and control and status display circuit module 240. Receiving circuit 159 includes receiving impedance matching circuit Module 320, rectifier circuit module 330, and voltage regulation circuit module 340.

In the present embodiment, the bare battery 180 with the wireless receiving function as shown in FIG. 1 has a complete receiving device 160 built in, or a complete receiving device 160 is built in the mobile electronic device 170. When the receiving device 160, whether the bare battery 180 or the mobile electronic device 170, is near the emitting surface 140, the transmitting device 131 can monitor the receiving device 160 and charge the receiving device 160. Although the electrode 182 of the battery is exposed, the described in-vehicle non-contact battery charger can be charged in a non-contact manner without the need to connect the battery electrode 182.

The transmitting device 131 may determine whether the receiving device 160 is present by a mechanism that detects the impedance of the receiving device 160 or a mechanism for establishing a wireless communication connection between the transmitting device 131 and the receiving device 160. Upon detecting the presence of the receiving device 160, the transmitting device 131 transmits an electromagnetic field to the receiving device 160 by the principle of the conductive coil mutual inductance (M). The electromagnetic field forms an alternating current (AC) in the receiving conductive coil 310 of the receiving device 160, and the alternating current (AC) passes through the rectifying circuit module 330 and the voltage stabilizing circuit module 340 to form a stable direct current (DC). The direct current charges the battery cell 370 through the charging circuit 350.

In a specific environment, in order to enable energy to be more efficiently transmitted from the transmitting device 131 and received by the receiving device 160, impedance matching must be performed on the transmitting conductive coil 210 and the peripheral circuits and the receiving conductive coil 310 and peripheral circuits. Energy receiving efficiency Ф The ratio of the energy received by the receiving device to the energy emitted by the transmitting device is affected by the plane distance (d) of the transmitting conductive coil 210 and the receiving conductive coil 310, the transmitting conductive coil 210 and the receiving conductive coil 310. The center is shifted (1), the emission impedance (Ztx) of the transmitting device 131, the receiving impedance (Zrx) of the receiving device 160, and the frequency (F) at which the transmitting device 131 drives the transmitting conductive coil 210.

The receiving device 160 feeds back the state of the receiving circuit 159 and the battery cell 370 to the transmitting device 131 through the feedback circuit 360. Such a feedback mechanism can be implemented by the receiving device 160 changing the mechanism of its own impedance to be detected by the transmitting device 131, or by establishing a mechanism for establishing a wireless communication connection between the transmitting device 131 and the receiving device 160.

After acquiring the state of the receiving circuit 159 and the battery cell 370, the transmitting device 131 can adjust the transmitting power of the charger according to the working state of the rechargeable battery through the control and status display circuit 240, and pass through a display device such as an LED, a liquid crystal panel, E-Paper, etc. shows the current battery operating status.

The in-vehicle non-contact battery charging device according to the present embodiment can charge the bare battery 180 with the wireless receiving function or the mobile electronic device 170 including the receiving device. This indicates that the planar distance (d) of the transmitting conductive coil 210 and the receiving conductive coil 310 and the center misalignment (1) of the transmitting conductive coil 210 and the receiving conductive coil 310 vary widely. Therefore, the system must be compatible with changes in the mutual inductance (M) of the larger conductive coil. When the mutual inductance (M) of the conductive coil is small, the system must ensure that sufficient power is received by the receiving device 160, and when the mutual inductance (M) of the conductive coil is large, the system must ensure that the receiving device 160 does not passively receive excessive energy. The anti-receiving device 160 or the battery cell 370 is overheated or even burned. Therefore, an effective feedback mechanism is established through the feedback circuit 360 to effectively control the transmission and reception energy, which is described in this embodiment. An important part of the vehicle's non-contact charging device.

As shown in FIG. 5, the transmitting coil 210 described in this embodiment can select two different coil forms: a conventional coil form 210a and an array form 210b composed of a plurality of small coils instead. Of course, the implementation of the coil is not limited to only the two forms shown in FIG. The choice of different coil forms will have an effect on energy reception efficiency (Ф).

As previously mentioned, the center misalignment (1) of the transmitting conductive coil 210 and the receiving conductive coil 310 is one of the important factors affecting the energy receiving efficiency (Ф). The conventional method involves using two small permanent magnets, one placed at the center of the transmitting conductive coil 210 and one placed at the center of the receiving conductive coil 310, so that the emission of the two small permanent magnets enables the emission to be conducted. The center misalignment (1) of the coil 210 and the receiving conductive coil 310 is kept within a small range. Due to the on-vehicle non-contact charging device of the embodiment, the bare battery 180 with the wireless receiving function can be charged, or the mobile electronic device 170 including the receiving device can be charged, so that the conductive coil 210 and the transmitting The center misalignment (1) of the receiving conductive coil 310 varies widely. Since the size of the bare battery 180 and the mobile electronic device 170 are not the same, the conventional permanent magnet method often fails to achieve the best effect. As shown in FIG. 5, the transmitting conductive coil 210 may be in the form of a conventional coil 210a. Instead, the array 210b is composed of a plurality of small coils. Such a coil array 210b reduces the need for precise alignment of the center of the transmitting conductive coil 210 and the receiving conductive coil 310 to a certain extent.

FIG. 6 is a flowchart showing an implementation of the in-vehicle non-contact battery charging device according to the embodiment. A line with an arrow refers to the information obtained to indicate the status, and an ellipse indicates various working states. The transmitting device 131 continuously detects whether or not the receiving device 160 appears. If the information obtained by the transmitting device 131 is "the receiving device is not detected", the transmitting device 131 is in the state of "detecting the receiving device". If the information obtained by the transmitting device 131 is "detected receiving device", the transmitting device 131 will enter an operating state of "identify battery state". In this working state, if the information obtained by the transmitting device 131 is "battery not full", the transmitting device 131 will enter the "charging" working state while transmitting the energy through the mutual inductance of the conductive coil to the receiving device 160, and may The transmitting device 131 displays the state of being charged. During the charging process, the transmitting device 131 will periodically enter the "identify battery state" to detect the battery state. If the information obtained by the transmitting device 131 is "Battery is full", the transmitting device 131 will enter a "hold" operating state, reduce the transmitted energy, maintain the battery state, and display the state in which the battery is fully charged at the transmitting device 131. Until the information of "the receiving device is not detected" is received, the transmitting device 131 enters the operating state of the "detecting receiving device".

Claims (7)

An in-vehicle non-contact battery charging device, comprising a transmitting device and a receiving device, characterized in that The transmitting device includes a power interface, a connecting wire, a transmitting circuit, and a transmitting conductive coil, which are sequentially connected for obtaining power from the automobile; The receiving device includes a receiving conductive coil, a receiving circuit, and a charging circuit that are sequentially connected. The on-vehicle contactless battery charging device according to claim 1, wherein The transmitting circuit includes a power input circuit module, a driving circuit module, a transmitting impedance matching circuit module, and a control and status display circuit module; The receiving circuit includes a receiving impedance matching circuit module, a rectifier circuit module, and a voltage stabilizing circuit module. The on-vehicle non-contact battery charging apparatus according to claim 1, wherein said transmitting means further comprises an emission surface, said emission conductive coil being laid on an inner side of the emission surface. The on-vehicle contactless battery charging device according to claim 1, wherein the transmitting device further comprises a support platform and/or a fixing device that fixes and supports the receiving device. The on-vehicle contactless battery charging device according to claim 1, wherein said receiving device further comprises a feedback circuit. The on-vehicle non-contact battery charging device according to claim 1, wherein said receiving device is housed in a battery. The on-vehicle non-contact battery charging device according to claim 1, wherein the receiving device is housed in an electronic device.

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