WO2021022446A1 - Device to be charged - Google Patents

Abstract

Disclosed is a device to be charged, comprising: a rear cover; a first battery for charging the device to be charged; and a second battery accommodated and fixed on an inner side of the rear cover. The device to be charged is additionally provided with the second battery on the inner side of the rear cover, such that without changing a battery system of an existing device to be charged, the battery life of the device to be charged can be improved.

Description

Device to be charged Technical field

The present disclosure relates to the field of charging technology, and in particular, to a device to be charged.

Background technique

The battery life of terminal devices, especially smart terminals, has always been a factor limiting their further development. Take the mobile phone as an example. It took more than 5 years for its battery capacity to develop from 2000mAh to the current greater than 4000mAh, and it was mainly due to the increase in the working voltage of the lithium-ion battery from 4.2V to 4.45V. However, due to the limitation of the phase change voltage of lithium cobalt oxide as the cathode material of the lithium ion battery, the working voltage of the lithium ion battery will hardly exceed 4.5V, which also limits the further improvement of the battery capacity.

However, the ever-increasing terminal performance puts forward higher and higher requirements for battery capacity, especially with the rapid development of 5G technology, battery capacity has increasingly become an important constraint affecting the development of terminal equipment. How to increase the battery capacity of terminal equipment has become an urgent problem to be solved.

The above-mentioned information disclosed in the background section is only used to enhance the understanding of the background of the present disclosure, so it may include information that does not constitute the prior art known to those of ordinary skill in the art.

Summary of the invention

In view of this, the present disclosure provides a device to be charged.

Other characteristics and advantages of the present disclosure will become apparent through the following detailed description, or partly learned through the practice of the present disclosure.

According to one aspect of the present disclosure, there is provided a device to be charged, including: a back cover; a first battery for supplying power to the device to be charged; and a second battery housed and fixed inside the back cover.

According to an embodiment of the present disclosure, the device to be charged further includes: a charging circuit, a first switch circuit and a second switch circuit connected to the charging circuit, and the first switch circuit, the second switch circuit, The control module connected to the charging circuit; the control module is used to control the first switch circuit and the second switch circuit, so that the charging circuit can charge the first battery or the second battery Recharge.

According to an embodiment of the present disclosure, the control module is further configured to control the first switch circuit and the second switch circuit when it is determined that the second battery is fully charged, so that the charging circuit is the Charge the first battery.

According to an embodiment of the present disclosure, the control module is further configured to control the first switch circuit and the second switch circuit according to the received control instruction sent by the user through the user interface, so that the charging circuit is The first battery is charged or the second battery is charged.

According to an embodiment of the present disclosure, the charging circuit includes: a first charging circuit and a second charging circuit; the second battery includes two and two of the second batteries are connected in series, and the control module is also used for The magnitude of the charging voltage output to the device to be charged, controlling the first charging circuit or the second charging circuit to charge the two second batteries connected in series; wherein, the first charging circuit is direct charging Path, the second charging circuit includes a first voltage conversion circuit.

According to an embodiment of the present disclosure, the first battery is connected in parallel with the second battery, and the device to be charged further includes: a charging interface; and a charging circuit connected to the charging interface and the first battery for Charging the first battery; and a charging circuit connected to the charging interface and the second battery, for charging the second battery.

According to an embodiment of the present disclosure, the second battery is charged by the first battery.

According to an embodiment of the present disclosure, the back cover includes an electrochromic area composed of an electrochromic material, and the second battery is used to power the electrochromic material.

According to an embodiment of the present disclosure, the second battery includes two pieces, which are respectively arranged in recessed areas on both sides of the electrochromic area.

According to an embodiment of the present disclosure, the device to be charged further includes: a receiving coil for wireless charging, which is arranged to overlap the electrochromic area.

According to an embodiment of the present disclosure, the second battery serves as a backup power source of the first battery to supply power to the device to be charged.

According to an embodiment of the present disclosure, the second battery includes two pieces, the back cover includes a camera area for accommodating a camera, and the camera area is located in the middle of the upper part of the back cover. Two batteries are respectively arranged in recessed areas on both sides of the camera area.

According to an embodiment of the present disclosure, the second battery includes two and the two second batteries are connected in series, and the device to be charged further includes: a second voltage conversion circuit for connecting the two second batteries When supplying power, the voltage output by the two second batteries is stepped down

According to the device to be charged provided by the embodiments of the present disclosure, by adding a second battery inside the back cover, the battery life of the device to be charged can be greatly improved without changing the battery system of the existing device to be charged.

It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present disclosure.

Description of the drawings

By describing its exemplary embodiments in detail with reference to the accompanying drawings, the above and other objectives, features, and advantages of the present disclosure will become more apparent.

Fig. 1 is a block diagram showing a device to be charged according to an exemplary embodiment.

Fig. 2 is a schematic diagram showing a back cover of a device to be charged according to an exemplary embodiment.

Fig. 3 is a schematic diagram showing an internal circuit to be charged according to an exemplary embodiment.

Fig. 4 is a schematic diagram showing another internal circuit to be charged according to an exemplary embodiment.

Fig. 5 is a schematic diagram showing another internal circuit to be charged according to an exemplary embodiment.

Fig. 6 is a schematic diagram showing another internal circuit to be charged according to an exemplary embodiment.

Fig. 7 is a schematic diagram showing another internal circuit to be charged according to an exemplary embodiment.

Fig. 8 is a block diagram of a wireless charging device according to an exemplary embodiment.

Fig. 9 is a schematic diagram showing another back cover of a device to be charged according to an exemplary embodiment.

Fig. 10 is a schematic diagram showing still another back cover of a device to be charged according to an exemplary embodiment.

Fig. 11 is a schematic diagram showing a second battery-powered circuit according to an exemplary embodiment.

Fig. 12 is a schematic diagram showing another circuit powered by a second battery according to an exemplary embodiment.

detailed description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms, and should not be construed as being limited to the examples set forth herein; on the contrary, the provision of these embodiments makes the present disclosure more comprehensive and complete, and fully conveys the concept of the example embodiments To those skilled in the art. The drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures denote the same or similar parts, and thus their repeated description will be omitted.

Furthermore, the described features, structures or characteristics can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to give a sufficient understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be used. In other cases, well-known structures, methods, devices, implementations, or operations are not shown or described in detail to avoid overwhelming attention and obscure all aspects of the present disclosure.

In the description of the present disclosure, it should be understood that the terms indicating the orientation or the positional relationship indicate the orientation or the positional relationship based on the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying The device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

In the present disclosure, unless otherwise clearly defined and defined, the terms "connected", "connected", "fixed" and other terms should be interpreted broadly. For example, they may be fixedly connected, detachably connected, or integrated. ; It can be an electrical connection or a communication connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood according to specific circumstances.

In addition, in the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, such as A and/or B, which can indicate the existence of A alone, B alone, and both A and B. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features.

Fig. 1 is a block diagram showing a device to be charged according to an exemplary embodiment. Fig. 2 is a schematic diagram showing a back cover of a device to be charged according to an exemplary embodiment. Fig. 3 is a schematic diagram showing an internal circuit to be charged according to an exemplary embodiment.

The device 10 to be charged as shown in FIG. 1 may be, for example, a terminal or a communication terminal. The terminal or communication terminal includes but is not limited to being set to be connected via a wired line, such as via a public switched telephone network (PSTN), Digital subscriber line (DSL), digital cable, direct cable connection, and/or another data connection/network and/or via, for example, cellular network, wireless local area network (WLAN), such as handheld Digital video broadcasting (digital video broadcasting handheld, DVB-H) network digital TV network, satellite network, amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and/or wireless interface of another communication terminal A device for receiving/sending communication signals. A communication terminal set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" and/or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, and the Internet/ Personal Digital Assistant (PDA) with intranet access, Web browser, notebook, calendar, and/or global positioning system (GPS) receiver; and conventional laptop and/or palmtop Receiver or other electronic device including a radio telephone transceiver. In addition, the terminal may also include, but is not limited to, rechargeable electronic devices with charging functions such as e-book readers, smart wearable devices, mobile power sources (such as power banks, travel chargers), and Bluetooth speakers.

1 to 3, the device to be charged 10 includes: a back cover 102, a second battery 106 accommodated and fixed inside the back cover 102, and a second battery 106 arranged inside the device to be charged 10 for supplying power to the device to be charged First battery 104.

Among them, the first battery 104 and the second battery 106 may be batteries of the same system, for example, both batteries of the lithium cobaltate/graphite system, that is, a lithium ion battery in which the positive electrode material is lithium cobalt oxide and the negative electrode material is graphite.

The first battery 104 may include a single cell or multiple cells. When the first battery 104 includes multiple cells, the multiple cells may be connected in series. As a result, the charging voltage that the first battery 104 can withstand is the sum of the charging voltages that a plurality of cells can withstand, which can increase the charging speed and reduce charging heat.

For example, taking the device to be charged 10 being a mobile phone as an example, when the first battery 104 of the device to be charged 10 includes a single cell, the voltage of the internal single cell is generally between 3.0V and 4.45V. When the first battery 104 of the device 10 to be charged includes two battery cells connected in series, the total voltage of the two battery cells connected in series is 6.0V-8.9V. Compared with a single-cell battery, it achieves the same charging speed. The charging current required by a multi-cell battery is about 1/N of the charging current required by a single-cell battery (N is the series connection in the device to be charged 10). The number of batteries). In other words, under the premise of ensuring the same charging speed (same charging power), adopting a solution with multiple battery cells can reduce the size of the charging current, thereby reducing the heat generated by the device 10 to be charged during the charging process. On the other hand, compared with the single-cell solution, under the condition that the charging current remains the same, the multi-cell series solution can increase the charging voltage, thereby increasing the charging speed.

The second battery 106 may include a single piece or multiple pieces, and each second battery 106 may also include a single cell or multiple cells. When the second battery 106 includes multiple batteries, the multiple second batteries 106 may be connected in series or in parallel.

The second battery 106 may be fixed to the inside of the back cover 102 by means of gluing or the like, for example. In some embodiments, the second battery 106 may be fixed in a recessed area inside the back cover 102, for example. Placing the second battery 106 in the recessed area inside the back cover 102 can prevent the back cover 102 from being completely closed due to the existence of the second battery 106 when the back cover 102 is installed on the device 10 to be charged. In addition, placing the second battery 106 in the recessed area inside the back cover 102 does not need to increase the thickness and volume of the device 10 to be charged.

As shown in FIG. 3, the device 10 to be charged further includes: a charging circuit 108, a first switch circuit 110, a second switch circuit 112 and a control module 114.

The charging circuit 108 is electrically connected to the first switch circuit 110 and the second switch circuit 112, and the control module 114 is electrically connected to the charging circuit 108, the first switch circuit 110 and the second switch circuit 112. The control module 114 is used to control the first switch circuit 110 and the second switch circuit 112 to make the charging circuit 108 charge the first battery 104 or the second battery 106.

For example, as shown in FIG. 3, the first switch circuit 110 is connected in series with the first battery 104, and the second switch circuit 112 is connected in series with the second battery 106. The series branch formed by the first switch circuit 110 and the first battery 104 is connected in parallel with the series branch formed by the second switch circuit 112 and the second battery 106.

The first switch circuit 110 and the second switch circuit 112 may be, for example, controllable switching elements such as switching transistors (such as MOS transistors).

When the first switching circuit 110 is turned off and the second switching circuit 112 is turned on, the charging circuit 108 charges the second battery 106; and when the first switching circuit 110 is turned on and the second switching circuit 112 is turned off, the charging circuit 108 The first battery 104 is charged.

The control module 114 may be implemented by, for example, an independent Micro Control Unit (MCU), or may also be implemented by an application processor (AP) inside the device 10 to be charged.

In some embodiments, for example, the control module 114 may be configured to charge the second battery 106 first, that is, control the first switch circuit 110 to turn off and the second switch circuit 112 to turn on, so that the charging circuit 108 is the second battery 106 Recharge. When it is determined that the second battery 106 is fully charged, the first switch circuit 110 is controlled to be turned on and the second switch circuit 112 is turned off, so that the charging circuit 108 charges the first battery 104.

The control module 114 may, for example, obtain the information of the second battery 106 from a detection module built into the second battery 106 to determine whether the second battery 106 is fully charged. For example, the control module 114 can determine whether the second battery 106 is fully charged through the power, voltage and/or charging current of the second battery 106 fed back by the detection module built in the second battery 106.

In addition, the control module 114 can also obtain related information of the second battery 106 through the detection module 116 in the device to be charged 10, so as to determine whether the second battery 106 is fully charged. The detection module 116 is connected to the second battery 106 for detecting the charging voltage and/or charging current loaded on both sides of the second battery 106. The control module 114 receives the charging voltage and/or charging current of the second battery 106 fed back by the detection module 116, and determines whether the second battery 106 is fully charged according to the charging voltage and/or charging current of the second battery 106.

In some embodiments, the control module 114 is further configured to control the first switch circuit 110 and the second switch circuit 112 according to the received user instruction, so that the charging circuit 108 charges the first battery 104 or the second battery 106 .

The user instruction is, for example, a control instruction sent by the user through the charging configuration user interface provided by the device 10 to be charged. The user can configure the order of charging the first battery 104 and the second battery 106 through the charging configuration user interface. The control module 114 sequentially charges the first battery 104 and the second battery 106 during charging according to the configuration of the user. In addition, the user can also configure the charging configuration user interface to simultaneously charge the first battery 104 and the second battery 106. When the user configures to charge the first battery 104 and the second battery 106 at the same time, the control module 114 controls the first switch circuit 110 and the second switch circuit 112 to be turned on at the same time, thereby simultaneously charging the first battery 104 and the second battery 106.

The device to be charged 10 shown in FIG. 3 uses wired charging as an example, and the device to be charged 10 further includes a charging interface 118. The device 10 to be charged is connected to the power supply device 1 through the charging interface 118 to receive the electric energy provided by the power supply device 1.

The charging interface 118 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 118 may also be a lightning interface, or any other type of parallel port or serial port that can be used for charging.

Fig. 4 is a schematic diagram showing another internal circuit to be charged according to an exemplary embodiment. As shown in FIG. 4, the charging circuit 108 includes: a first charging circuit 1082 and a second charging circuit 1084.

When the second battery 106 includes two batteries (each second battery 106 takes a single cell as an example), and the two second batteries 106 are connected in series, if the power supply device 1 that provides power to the device 10 to be charged can support dual For direct charging of batteries in series, for example, the output voltage of the power supply device is 10V (the maximum output power is 50W (10V/5A)), and the control module 114 can control the first charging circuit 1082 (that is, the direct charging path) to directly connect the two in series The second battery 106 is charged. If the power supply device 1 cannot support the direct charging of two series-connected batteries, for example, the output voltage of the power supply device is 5V, the control module 114 controls the second charging circuit 1084 to charge the two second batteries 106 connected in series. The second charging circuit 1084 may include a first voltage conversion circuit (such as a Boost boost circuit) 84a, which boosts the charging voltage applied to the second battery 106 to meet the requirements of the charging voltage of the double-series battery.

Those skilled in the art should understand that, taking two second batteries 106 in series as an example above, when the second battery 106 includes more than two batteries connected in series, the control circuit 114 can be connected to the device to be charged 10 The output voltage of the power supply device 1, that is, the magnitude of the charging voltage output to the device 10 to be charged, controls whether the first charging circuit 1082 or the second charging circuit 1084 charges the second battery 106.

Similarly, when charging the first battery 104, the control module 114 can also control whether the first charging circuit 1082 or the second charging circuit is used according to the output voltage of the power supply device 1 based on the number of cells contained in the first battery 104. 1084 charges the first battery 104.

The control module 114 can communicate with the power supply device 1 to obtain output voltage information of the power supply device 1. The control module 114 can communicate through the charging interface 118, for example, without setting an additional communication interface or other wireless communication modules, which can simplify the implementation of the device 10 to be charged. If the charging interface 118 is a USB interface, the control module 114 and the power supply device 1 can communicate based on the data lines (such as D+ and/or D- lines) in the USB interface. In another example, if the charging interface 118 is a USB interface (such as a USB TYPE-C interface) supporting a power delivery (PD) communication protocol, the control module 114 and the power supply device 1 may communicate based on the PD communication protocol.

Fig. 5 is a schematic diagram showing another internal circuit to be charged according to an exemplary embodiment. In the device to be charged 10a as shown in FIG. 5, the second battery 106 is directly charged through the charging circuit 108, and the second switch circuit 112 is not provided. In addition, the device to be charged 10 a further includes a charging circuit 120 connected to the first battery 104. The first battery 104 is charged through the charging circuit 120.

In the device to be charged 10a, two charging circuits (charging circuit 108 and charging circuit 120) are separated from the charging interface 118, so that the first battery 104 and the second battery 106 can be charged at the same time.

Both the charging circuit 108 and the charging circuit 120 may include a first charging circuit 1082 and a second charging circuit 1084 as shown in FIG. 4. The control module 114 controls whether the first battery 104 is charged by the first charging circuit 1082 or the first charging circuit 1084 according to the magnitude of the voltage output by the power supply device 1, and whether the first charging circuit 1082 is charged by the first charging circuit 1084 The second battery 106 is charged.

Fig. 6 is a schematic diagram showing another internal circuit to be charged according to an exemplary embodiment. In the device 10b to be charged as shown in FIG. 6, the first battery 104 is charged through the charging circuit 120. The charging circuit 120 may include a first charging circuit 1082 and a second charging circuit 1084 as shown in FIG. 4. The control module 114 controls whether the first charging circuit 1082 or the first charging circuit 1084 charges the first battery 104 according to the magnitude of the voltage output by the power supply device 1.

In addition, the second battery 106 is connected to the first battery 104, and the control module 114 is configured to control the first battery 104 to charge the second battery 106.

Fig. 7 is a schematic diagram showing another internal circuit to be charged according to an exemplary embodiment. The difference from the device to be charged 10 shown in FIG. 3 is that the device to be charged 10c shown in FIG. 7 uses a wireless charging method as an example, and the charging circuit 108 is connected to the wireless receiving circuit 122.

The wireless receiving circuit 122 is configured to receive the electromagnetic signal (or electromagnetic wave) emitted by the wireless charging device 2 and convert the electromagnetic signal (or electromagnetic wave) into the direct current output by the wireless receiving circuit 122. For example, the wireless receiving circuit 122 may include: a receiving coil or a receiving antenna, and a rectifying circuit and/or a filtering circuit connected to the receiving coil or the receiving antenna, and other shaping circuits. The wireless receiving circuit 122 converts the electromagnetic signal (or electromagnetic wave) emitted by the wireless charging device 2 into alternating current through a receiving coil or a receiving antenna, and rectifies and/or filters the alternating current through a shaping circuit, thereby converting the alternating current into a stable Direct current is used to charge the first battery 104 and the second battery 106.

It should be noted that the embodiment of the present invention does not specifically limit the specific form of the shaping circuit and the form of the output voltage and output current of the wireless receiving circuit 122 obtained after the shaping circuit is shaped. In addition, the wireless receiving circuit 122 shown in FIG. 7 can also replace the charging interface 118 shown in FIG. 5 and FIG. 6 respectively, so as to provide a wireless charging method for the devices 10a and 10b to be charged.

Those skilled in the art can understand that the device to be charged 10c shown in FIG. 7 and the device to be charged 10 shown in FIG. 3, the device to be charged 10a shown in FIG. 5, and the device to be charged 10b shown in FIG. The ways of supplying electric energy are different, and the ways of charging the first battery 104 and the second battery 106 inside the device to be charged are the same, which will not be repeated here.

Fig. 8 is a block diagram of a wireless charging device according to an exemplary embodiment. As shown in FIG. 8, the wireless charging device 2 includes: a charging interface 21, a control module 22 and a wireless transmitting circuit 23.

The wireless charging device 2 is connected to the power supply device 1 (such as a power adapter, mobile power supply, etc.) through the charging interface 21, and receives the electric energy output by the power supply device 1.

The charging interface 21 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 21 may also be a lightning interface, or any other type of parallel port or serial port that can be used for charging.

The wireless transmitting circuit 23 is used to convert the electric energy output by the power supply device 1 into electromagnetic signals (or electromagnetic waves) for transmission, so as to wirelessly charge the device 10c (such as a terminal device) to be charged. For example, the wireless transmission circuit 23 may include: a wireless transmission drive circuit and a transmission coil (or transmission antenna). The wireless transmitting circuit 23 is used to convert the direct current output by the power supply device 1 into high-frequency alternating current, and convert the high-frequency alternating current into an electromagnetic signal (or electromagnetic wave) through a transmitting coil or a transmitting antenna, and transmit it out.

The control module 22 can be realized by, for example, an MCU. The control module 22 is electrically connected to the charging interface 21 and the wireless transmitting circuit 23, and is used to communicate with the device to be charged 10c and the power supply device 1 during the wireless charging process of the device to be charged 10c by the wireless charging device 2 respectively.

The wireless charging device 2 (control module 22) can communicate with the power supply device 1, for example, it can communicate through the charging interface 21, without the need to set up an additional communication interface or other wireless communication module, which can simplify the wireless charging device 2 achieve. If the charging interface 21 is a USB interface, the wireless charging device 2 (control module 22) and the power supply device 1 can communicate based on the data lines (such as D+ and/or D- lines) in the USB interface. Another example is that the charging interface 21 is a USB interface (such as a USB TYPE-C interface) that supports a power delivery (PD) communication protocol, and the wireless charging device 2 (control module 22) and the power supply device 1 can communicate based on the PD communication protocol .

In addition, the wireless charging device 2 (control module 22) may also be communicatively connected with the power supply device through other communication methods besides the charging interface 21. For example, the wireless charging device 2 (control module 22) may communicate with the power supply device 1 in a wireless manner, such as Near Field Communication (NFC).

The control module 22 can communicate with the device to be charged 10c in a wireless manner, for example, to interact with the wireless charging mode that the wireless charging device 2 can provide, so that the control module 114 in the device to be charged 10c can control whether to use the first charging circuit 1082 or The second charging circuit 1084 charges the first battery 104 or the second battery 106.

The wireless charging mode may include, for example, a first wireless charging mode and a second wireless charging mode. The first wireless charging mode may be a fast wireless charging mode. The second wireless charging mode may be referred to as a normal wireless charging mode. The charging speed of the device to be charged 10c of the wireless charging device 2 in the first wireless charging mode is faster than the charging speed of the device to be charged 10c of the wireless charging device 2 in the second wireless charging mode. In other words, compared with the wireless charging device 2 working in the second wireless charging mode, the wireless charging device 2 working in the first wireless charging mode takes time to fully charge the battery in the device to be charged 10c with the same capacity Shorter.

The common wireless charging mode may refer to a wireless charging mode in which the transmission power of the wireless charging device 2 is relatively small (usually less than 15W, and the commonly used transmission power is 5W or 10W). For example, it can be a traditional wireless charging mode based on the QI standard, the PMA standard, or the A4WP standard. In the normal wireless charging mode, it usually takes several hours to fully charge a large-capacity battery (such as a 3,000 mAh battery).

In the fast wireless charging mode, the transmitting power of the wireless charging device 2 is relatively large (usually greater than or equal to 15W, such as 15-25W). Compared with the normal wireless charging mode, the charging time required for the wireless charging device 2 to fully charge the battery of the same capacity in the fast wireless charging mode can be significantly shortened and the charging speed is faster.

The present invention does not limit the communication mode and communication sequence between the wireless charging device 2 and the device to be charged 10c. For example, it may be one-way wireless communication or two-way wireless communication. It may be a communication initiated by the device to be charged 10c, or may be a communication initiated by the wireless charging device 2. In the wireless communication process, the device to be charged 10c can couple the information to be sent to the receiving coil of the wireless receiving circuit 122, and then send it to the transmitting coil of the wireless transmitting circuit 23, and then the wireless transmitting circuit 23 will decouple the information. The information is sent to the control module 22. Conversely, in two-way communication, the wireless charging device 2 can couple the information to be sent to the transmitting coil of the wireless transmitting circuit 23 to send it to the receiving coil of the wireless receiving circuit 122 of the device to be charged 10c, and then the device to be charged The receiving coil of the wireless receiving circuit 122 of 10c is decoupled.

Alternatively, the wireless charging device 2 can also communicate via Bluetooth, WiFi, mobile cellular network (such as 2G, 3G, 4G or 5G), wireless communication (such as IEEE 802.11, 802.15 (WPANs), 802.16 (WiMAX), 802.20, etc.), based on At least one of communication methods such as short-range wireless communication, optical communication (such as infrared communication), ultrasonic communication, ultra-wideband (UMB) communication, and the like of a high-frequency antenna (such as 60 GHz) communicates with the device to be charged 10c. It is understandable that when communicating through the above-mentioned communication method, the device to be charged 10c and the wireless charging device 2 also include corresponding communication modules, such as a Bluetooth communication module, a WiFi communication module, a 2G/3G/4G/5G mobile communication module, High frequency antenna, optical communication module. At least one of an ultrasonic communication module, an ultra-wideband communication module, and the like. It should be understood that the aforementioned standards applicable to wireless communication include past and existing standards, and, without departing from the scope of the present disclosure, also include future versions and future standards that adopt these standards. By communicating through the above-mentioned wireless communication method, the reliability of communication can be improved, thereby improving charging safety. Compared with the related technology (for example, the Qi standard) in which the feedback information is coupled to the receiving coil of the wireless receiving circuit 122 for communication through signal modulation, the reliability of communication can be improved, and the use of signal coupling can be avoided. The incoming voltage ripple affects the voltage processing process of the voltage conversion circuit (see the first voltage conversion circuit 84a in FIG. 4) of the device to be charged 10c. In addition, for the voltage ripple when the wireless receiving coil is output, if the ripple is not effectively processed, it may cause wireless charging safety problems, and there are certain safety risks. Communication through the above-mentioned wireless communication method can eliminate voltage ripple, thereby eliminating the need for a circuit for processing voltage ripple, reducing the complexity of the charging circuit of the device 10c to be charged, improving charging efficiency, and saving circuit installation space, reduce costs.

Fig. 9 is a schematic diagram showing another back cover of a device to be charged according to an exemplary embodiment.

As shown in FIG. 9, the back cover 102 further includes an electrochromic area 102a made of electrochromic material. This area can change color to provide users with a more colorful back cover design. The colorful design needs to be driven by electricity. If the first battery 104 provides power for it, the power consumption of the first battery 104 will inevitably be accelerated. Therefore, the above-mentioned second battery 106 can be used to supply power to the electrochromic material constituting the electrochromic region 102a, and the power consumption of the first battery 104 by the electrochromic material can be avoided.

In some embodiments, as shown in FIG. 9, the electrochromic area 102 a may be located in the middle part under the back cover 102, for example. The electrochromic area 102a can be realized by adding an electrochromic material inside the back cover 102, and the thickness of the electrochromic material can be, for example, about 1 mm. In this way, a recessed area 102b of corresponding thickness is generated on both sides of the electrochromic area 102a, so the second battery 106 can be fixed in the recessed area 102b. If the second battery 106 is configured as a single battery, it can be fixed on either side of the recessed area 102b on both sides of the electrochromic area 102a. If the second battery 106 includes multiple batteries, the multiple second batteries 106 may be fixed in the recessed areas 102b on both sides, respectively. For example, if there are two second batteries 106, one second battery 106 can be fixed in the recessed areas 102b on both sides respectively.

The electrochromic area 102a may also be provided in other areas of the back cover, and the present disclosure is not limited thereto. The second battery 106 can be arranged according to the position of the electrochromic area 102a.

In addition to powering the electrochromic material in the electrochromic area 102a, the second battery 106 can also be used as a backup power source for the first battery 104 to power the device 10 to be charged. That is, after the power of the first battery 104 is exhausted, the second battery 106 can be used to supply power to the device 10 to be charged, thereby improving the endurance of the device 10 to be charged.

Since the second battery 106 is usually a soft pack battery packaged with aluminum-plastic film, in the device to be charged 10c as shown in FIG. 8, in order to avoid the influence of the second battery 106 on the receiving coil, it is necessary to connect the receiving coil with the electrochromic The area 102a is overlapped to be far away from the second battery 106.

In addition, referring to FIG. 9, the back cover 102 may also include a camera area 102 c for accommodating the camera of the device 10 to be charged. The camera area 102c may be, for example, as shown in FIG. 9, set at the middle position of the upper part of the back cover 102, that is, set at the upper part of the electrochromic area 102a, but the present invention is not limited to this. Similarly, in order to accommodate the camera, a recessed area 102d with a certain thickness is generated on both sides of the camera area 102c, and the recessed area 102d can also be used to fix the second battery 106.

Fig. 10 is a schematic diagram showing still another back cover of a device to be charged according to an exemplary embodiment. As shown in FIG. 10, the back cover 102 may not include the electrochromic area 102a. At this time, the recessed area that can be used to fix the second battery 106 is only the recessed area 102d on both sides of the camera area 102c.

It should be noted that if the camera area 102c is arranged on the left or right side of the back cover 102, the recessed area 102d is only on one side of the camera area 102c.

At this time, the second battery 106 can be used as a backup battery of the first battery 104 to supply power to the device 10 to be charged. For example, when the power of the first battery 104 is exhausted, the second battery 106 can start to supply power to the device 10 to be charged; After exhaustion, the first battery 104 supplies power to the device 10 to be charged.

This setting can also be set by the user in the charging configuration user interface provided by the device 10 to be charged, for example.

Fig. 11 is a schematic diagram showing a circuit for supplying power from a second battery according to an exemplary embodiment. As shown in FIG. 11, if the second battery 106 includes multiple batteries (two batteries are used as an example in the figure), when the second battery 106 supplies power to the circuit 124 to be powered, a second voltage conversion circuit 126 needs to be provided. It is used to step down the voltage output by the plurality of second batteries 106 to provide a suitable output voltage for the circuit 124 to be powered.

It should be noted that the figure takes the device to be charged 10 shown in FIG. 3 as an example, but in order to simplify the figure, the relevant modules or circuits in the charging circuit are omitted, and only the schematic diagram of the circuit for supplying power through the second battery 106 is shown. .

The circuit to be powered 124 may include, for example, the electrochromic material in the electrochromic region 102a described above, or may also include other circuits in the device to be charged 10 that require power supply.

The second voltage conversion circuit 126 may be, for example, a Buck circuit, or may also be a switched capacitor (Switch Cap) circuit.

Fig. 12 is a schematic diagram showing another circuit powered by a second battery according to an exemplary embodiment. As shown in FIG. 12, one of a plurality of second batteries 106 (two second batteries 106 are taken as an example in the figure) can also be used to supply power to the circuit 124 to be powered. However, it should be noted that when one of the plurality of second batteries 106 is used to supply power to the circuit 124 to be powered, an equalization circuit 128 is also required to balance the plurality of second batteries 106 before the plurality of second batteries 106 are charged. The voltage between the two batteries 106.

The equalization module 128 may, for example, use a capacitive coupling method to balance the voltages between the multiple second batteries 106, or may also use an electromagnetic coupling method to balance the voltages between the multiple second batteries 106. However, the present disclosure is not limited to this. Those skilled in the art should understand that the equalization module 128 may be any equalization circuit suitable for equalizing the voltages of multiple batteries.

It should be noted that the figure still takes the device to be charged 10 shown in FIG. 3 as an example. In order to simplify the figure, the relevant modules and/or circuits in the charging circuit are omitted, and only the power supply through the second battery 106 is shown. Circuit diagram.

According to the device to be charged provided by the embodiments of the present disclosure, by adding a second battery inside the back cover, the battery life of the device to be charged can be improved without changing the battery system of the existing device to be charged. In some embodiments, the second battery is arranged using a recessed area in the back cover without increasing the thickness and volume of the device to be charged.

It should be noted that the block diagram shown in the above drawings is a functional entity, and does not necessarily correspond to a physically or logically independent entity. These functional entities may be implemented in the form of software, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and/or processor devices and/or microcontroller devices.

The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structure, arrangement or implementation method described herein; on the contrary, the present disclosure intends to cover various modifications and equivalent arrangements included in the spirit and scope of the appended claims.

Claims (13)

A device to be charged is characterized in that it comprises: Back cover The first battery is used to supply power to the device to be charged; and A second battery housed and fixed inside the back cover. The device to be charged according to claim 1, further comprising: a charging circuit, a first switching circuit and a second switching circuit connected to the charging circuit, and a connection with the first switching circuit and the second switching circuit. A circuit, a control module connected to the charging circuit; the control module is used to control the first switch circuit and the second switch circuit, so that the charging circuit can charge the first battery or charge the first battery 2. Charge the battery. The device to be charged according to claim 2, wherein the control module is further configured to control the first switch circuit and the second switch circuit when it is determined that the second battery is fully charged, so that The charging circuit charges the first battery. According to claim 2, the device to be charged is characterized in that the control module is further configured to control the first switch circuit and the second switch circuit according to the received control instruction sent by the user through the user interface , So that the charging circuit can charge the first battery or charge the second battery. The device to be charged according to any one of claims 2-4, wherein the charging circuit comprises: a first charging circuit and a second charging circuit; the second battery comprises two pieces and two pieces of the first Two batteries are connected in series, and the control module is also used to control the first charging circuit or the second charging circuit to charge the two second batteries connected in series according to the magnitude of the charging voltage output to the device to be charged ; Wherein, the first charging circuit is a direct charging path, and the second charging circuit includes a first voltage conversion circuit. The device to be charged according to claim 1, wherein the first battery is connected in parallel with the second battery, and the device to be charged further comprises: Charging interface; A charging circuit connected to the charging interface and the first battery is used for charging the first battery; and A charging circuit connected to the charging interface and the second battery is used to charge the second battery. The device to be charged according to claim 1, wherein the second battery is charged by the first battery. The device to be charged according to claim 1, wherein the back cover comprises: an electrochromic area composed of an electrochromic material, and the second battery is used to supply power to the electrochromic material. The device to be charged according to claim 8, wherein the second battery comprises two pieces, which are respectively arranged in recessed areas on both sides of the electrochromic area. The device to be charged according to claim 9, further comprising: a receiving coil for wireless charging, which is arranged to overlap the electrochromic area. The device to be charged according to claim 1, wherein the second battery serves as a backup power source for the first battery to supply power to the device to be charged. The device to be charged according to claim 11, wherein the second battery includes two pieces, the back cover includes a camera area for accommodating a camera, and the camera area is located in the middle of the upper part of the back cover Position, the two second batteries are respectively arranged in the recessed areas on both sides of the camera area. The device to be charged according to any one of claims 8-12, wherein the second battery comprises two pieces of which are connected in series, and the device to be charged further comprises: a second voltage conversion The circuit is used to step down the voltage output by the two second batteries when the two second batteries are powered.

Images