WO2010115355A1

WO2010115355A1 - Data card and method for supplying power by data card

Info

Publication number: WO2010115355A1
Application number: PCT/CN2010/070479
Authority: WO
Inventors: 李辉; 范勇; 王一鸥
Original assignee: 华为终端有限公司
Priority date: 2009-04-10
Filing date: 2010-02-02
Publication date: 2010-10-14
Also published as: CN101527003A

Abstract

A data card and a method for supplying power by the data card, belonging to the electronic circuit field. The data card comprises: a data card interface, a power management center, a battery and a post emission circuit. The data card interface obtains current. The power management center controls the charging current level of the battery, and is further used for detecting the state of the battery and controlling whether to charge the battery or not according to the state. The battery is used for storing the electrical energy and providing the post emission circuit with current. The embodiment of the invention uses a charging battery to replace the existing super capacitor with low ESR and high capacity, and can provide power for the post circuit with limited electrical source output power. At the same time, the battery has the characteristics of ultra low ESR and high energy storage, and can avoid the dependence of the data card of a USB interface towards a low ESR super capacitor, and compared with the low ESR super capacitor, the battery has mature manufacturing technology and wide resource.

Description

The invention provides a Chinese patent application for the data card and the data card. Priority of the application, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of electronic circuits, and in particular, to a data card and a data card power supply method. BACKGROUND OF THE INVENTION Currently, data cards are widely used. In the process of using a data card, when supporting a time division system, such as GSM (Global System for Mobile Communications), it is inevitable to use a low ESR (Equivalent Serial Resistor, The millimeter (mF) class supercapacitor of the equivalent series resistance is used as the output stage storage capacitor of the data card. If the ESR is too large and the capacitance is small, the operation of the wireless signal will be abnormal due to the low voltage of the capacitor. In addition, since the milli-scale supercapacitor is currently adopting a solid tantalum process, it is complicated to manufacture, has a low withstand voltage value, has a low reliable derating, and has a high probability of accidents. Therefore, the capacity of the milli-scale super capacitor is currently very tight.

In the process of implementing the present invention, the inventors discovered that:

When a supercapacitor is used as the output capacitor of the data card, the requirement of the capacitor is high, and low ESR and high capacity are required. However, the process of low ESR and high capacity super capacitor is complicated, the technical threshold is high, and the capacity is limited. Summary of the invention

In view of this, the embodiment of the present invention provides a data card and a data card power supply method, and the technical solution is as follows:

A data card, comprising: a data card interface, a power management center, a battery, and a post-stage transmitting circuit; the data card interface, configured to acquire a current, and provide a charging current for the battery;

The power management center is connected to the data card interface, and is configured to control a charging current flowing through the battery, and is further configured to detect a state of the battery, and perform charging on the battery according to the state. Control

The battery is connected to a power management center to store electrical energy to provide current to the subsequent stage transmitting circuit. A method for powering a data card, the method comprising: Obtaining the current that charges the battery;

Controlling, in the process of charging the battery, a magnitude of a charging current flowing through the battery; detecting a state of the battery, controlling whether to charge the battery according to the state; Stores electrical energy to supply current to the rear stage transmit circuitry.

The beneficial effects of the technical solution provided by the embodiments of the present invention are that the present embodiment can supply power to a power supply output limited rear stage circuit by using a rechargeable battery instead of the existing low ESR, high capacity super capacitor. At the same time, the battery has ultra-low ESR and high energy storage characteristics, which can avoid the dependence of the data card on the low ESR supercapacitor; and compared with the low ESR supercapacitor, the battery has mature production process and wide resources. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and other drawings may be obtained from those skilled in the art without departing from the drawings.

1 is a schematic structural diagram of a data card according to Embodiment 1 of the present invention;

2 is a schematic structural diagram of a data card according to Embodiment 2 of the present invention;

3 is a schematic structural diagram of still another data card according to Embodiment 2 of the present invention;

FIG. 4 is a flowchart of a method for powering a data card according to Embodiment 3 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the embodiments of the present invention will be further described in detail below. Embodiment 1 As shown in FIG. 1 , it is a schematic structural diagram of a data card according to Embodiment 1 of the present invention. The power supply device includes: a data card interface 10, a power management center 11, a battery 12, and a rear stage transmitting circuit 13. a data card interface 10, configured to acquire a current, and provide a charging current for the battery 12; The power management center 11 is connected to the data card interface for controlling the charging current flowing through the battery, and is also used for detecting the state of the battery, and controlling whether the battery is charged according to the state; the battery 12, and the power management center Connected, the electrical energy is stored to provide current to the rear stage transmitting circuit 13. In this embodiment, by using a rechargeable battery instead of the existing low-ESR, high-capacity super capacitor, it is possible to supply power to the subsequent stage circuit in which the power output is limited. For example, the data card is suitable for use in a GSM scenario, when the latter device is a mobile phone, the mobile phone is in a wireless signal transmission time slot of a call and a call, and the data card provides a high stability voltage to the rear stage transmitting circuit 13 through the battery 12. , in turn, provides a highly stable voltage to the mobile phone. At the same time, the battery has ultra-low ESR and high energy storage characteristics, which can avoid the dependence of the data card on the low ESR supercapacitor; and compared with the low ESR supercapacitor, the battery has mature production process and wide resources. Embodiment 2 As shown in FIG. 2, it is a schematic structural diagram of a data card according to Embodiment 2 of the present invention. The data card includes: a data card interface 10, a power management center 11, a battery 12, and a rear-stage transmitting circuit 13, The data card interface 10 is configured to obtain a current and provide a charging current for the battery 12; wherein, the data card interface 10 can be a USB (Universal Serial Bus) interface, or can be a PCI (Pedpherd Component Interconnect, Peripheral component expansion interface) interface, etc. These interfaces are connected to external circuits, such as laptops, to provide charging current to the power supply within the data card. The data card interface 10 in this embodiment is described by taking a USB interface as an example. The power management center 11 is connected to the data card interface 10, and includes a charging control unit 111 and a battery control unit 112. The power management center 11 and the data card interface 10 can be connected by a series connection or a transformer circuit. The charging control unit 111 can be used. Controlling the magnitude of the charging current flowing through the battery 12; the battery control unit 112 is configured to detect the state of the battery 12, including whether to insert the battery, detect the battery voltage, detect whether the battery is overcharged, etc., and according to the state of the battery 12 Controlling whether to charge the battery 12; the battery 12, connected to the power management center 11, stores electrical energy, and supplies current to the rear stage transmitting circuit 13; wherein the rear stage transmitting circuit 13 can be directly connected to the battery 12, or can pass through The voltage conversion circuit is connected. The working principle of the power supply device provided in this embodiment is as follows: When the battery 12 is charged, the charging current flowing through the battery 12 may not be too large, otherwise the battery may explode easily, and the charging control unit 111 may detect the current flowing through the battery 12 and control the magnitude of the current; During the charging process, the battery control unit 112 can detect the state of the battery 12, and then control the charging process of the battery 12 according to the state of the battery 12. The state of the battery 12 may include detecting whether the battery 12 is inserted, detecting the voltage of the battery 12, and detecting whether the battery is overcharged. In this embodiment, the power management center 11 may select an IC (integrated circuit) chip capable of implementing power management. The battery 12 can be a lithium rechargeable battery or a nickel-hydrogen rechargeable battery. Further, as shown in FIG. 3, it is a schematic structural diagram of another data card provided by Embodiment 2 of the present invention. In the figure, the charging control unit 111 includes a charging current detecting circuit 1111 and a charging control circuit 1112; the battery control unit 112 includes a battery detecting circuit 1121 and a battery control circuit 1122. In the power supply device shown in FIG. 3, the charging control unit 111 further includes a resistor x for detecting current; a transistor y for controlling the current magnitude; and the battery control unit 112 further includes a switch tube z for turning on and off the battery 12 Charge it. Further, the data card may further include a power insertion detecting unit 113, configured to detect whether the data card of the USB interface has an external power input, whether the polarity of the external power input is correct, and whether the voltage range of the external power source is consistent. Each of the above units and circuits can be implemented by an integrated circuit. In this embodiment, the working principle of the power supply device shown in FIG. 3 is:

(1) Control process of charging current:

The USB interface is plugged into the external power supply, and the gpUSB interface has an external power input to charge the battery 12. In the charging process, in order to avoid an accident of the battery 12 caused by excessive charging current, the charging current is detected by the resistor X. The current flowing through the resistor X can be obtained by periodically checking the voltage across the resistor X, and the current flowing through the resistor X is obtained. The charging current detecting circuit 1111 obtains a current flowing through the resistor X, and compares it with a preset maximum current. When the charging current exceeds a preset maximum current, the charging current detecting circuit 1111 feeds back the charging current to the charging control circuit 1112. The charge control circuit 1112 controls the base current flowing through the transistor y to reduce the base current flowing through the transistor y, so that the collector current flowing through the transistor y decreases, and the current flowing through the resistor X also decreases. After the current flows through the resistor, the battery 12 is charged, and therefore, the charging current is also reduced. The charging current detecting circuit 1111 and the charging control circuit 1112 can be implemented by an integrated circuit or by software. (2) Charging control process for the battery 12: The state of the battery 12 is detected by the battery detecting circuit 1121. If the battery 12 is overcharged, or the battery 12 has not been charged to the rated voltage, the battery detecting circuit 1121 can detect The result is fed back to the battery control circuit 1122. The battery control circuit 1122 controls the switching of the switch tube z according to the feedback result. When the switch tube z is turned on, the battery 12 is charged; when turned off, the battery is not charged. In this embodiment, both the battery detection circuit 1121 and the battery control circuit 1122 can be implemented by an integrated circuit or by software. In this embodiment, by using a rechargeable battery instead of the existing low-ESR, high-capacity super capacitor, it is possible to supply power to the subsequent stage circuit in which the power output is limited. At the same time, the battery has ultra-low ESR and high energy storage characteristics, which can avoid the dependence of the USB interface data card on the low ESR super capacitor; and compared with the low ESR super capacitor, the battery has mature production process and wide resources. In this embodiment, the power management center controls the charging current of the battery and controls whether the battery is charged, so that the battery can work in a better state. Embodiment 3 is a flowchart of a power supply method for a data card according to the embodiment shown in FIG. 4, the method includes: 401: Acquire a current for charging a battery;

402: controlling the charging current flowing through the battery during charging of the battery; 403: detecting the state of the battery, controlling whether the battery is charged according to the state; 404: storing the electric energy of the battery, being the latter stage The transmitting circuit provides current. Further, before controlling the magnitude of the charging current flowing through the battery, the method further includes: detecting a magnitude of a charging current flowing through the battery. Further, controlling the magnitude of the charging current flowing through the battery includes: reducing a charging current flowing through the battery when a charging current flowing through the battery exceeds a preset maximum current. Further, detecting the state of the battery, and controlling whether the battery is charged according to the state includes: detecting the voltage of the battery, stopping charging the battery when the voltage of the battery reaches the rated value; or, when the voltage of the battery is not reached After the rating, continue charging the battery. In this embodiment, the battery type can have various options, such as a lithium rechargeable battery or a nickel-hydrogen rechargeable battery. In this embodiment, by using a rechargeable battery instead of the existing low-ESR, high-capacity super capacitor, it is possible to supply power to the subsequent stage circuit in which the power output is limited. At the same time, the battery has ultra-low ESR and high energy storage characteristics, which can avoid the dependence of the USB interface data card on the low ESR super capacitor; and compared with the low ESR super capacitor, the battery has mature production process and wide resources. In this embodiment, the power management center controls the charging current of the battery and controls whether the battery is charged, so that the battery can work in a better state. A person skilled in the art can understand that the drawings are schematic diagrams of a preferred embodiment, and the modules or processes in the drawings are not necessarily required to implement the invention. Those skilled in the art can understand that the modules in the apparatus in the embodiment may be distributed in the apparatus of the embodiment according to the embodiment, or may be correspondingly changed in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules. The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments. Some steps in the embodiment of the present invention may be implemented by using software, and the corresponding software program may be stored in a readable storage medium, such as an optical disk or a hard disk. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Rights request

A data card, comprising: a data card interface, a power management center, a battery, and a rear stage transmitting circuit;

The data card interface is configured to acquire a current and provide a charging current for the battery;

The power management center is connected to the data card interface for controlling a charging current flowing through the battery, detecting a state of the battery, and controlling whether the battery is charged according to the state; The battery is connected to the power management center for storing electrical energy to provide current for the subsequent stage transmitting circuit.

The data card according to claim 1, wherein the power management center comprises: a charging control unit, configured to control a charging current flowing through the battery;

And a battery control unit, configured to detect a state of the battery, and control whether to charge the battery according to the state.

The data card according to claim 2, wherein the charging control unit comprises: a charging current detecting circuit, configured to detect a magnitude of a charging current flowing through the battery;

And a charging control circuit for controlling a magnitude of a charging current flowing through the battery according to a detection result of the charging current detecting circuit.

4. The data card according to claim 2, wherein the battery control unit comprises: a battery detection circuit, configured to detect a state of the battery;

And a battery control circuit for controlling whether to charge the battery according to a detection result of the battery detection circuit.

The data card according to claim 1, wherein the battery is a lithium rechargeable battery or a nickel-hydrogen rechargeable battery.

6. A method for powering a data card, the method comprising:

Obtaining the current that charges the battery;

The method according to claim 6, wherein the controlling the size of the charging current flowing through the battery further comprises:

The magnitude of the charging current flowing through the battery is detected.

8. The method according to claim 7, wherein the controlling the magnitude of the charging current flowing through the battery comprises:

The charging current flowing through the battery is reduced when a charging current flowing through the battery exceeds a preset maximum current.

The method according to claim 6, wherein the detecting the state of the battery, and controlling whether to charge the battery according to the state comprises:

Detecting a voltage of the battery, and stopping charging the battery after the voltage of the battery reaches a rated value;

When the voltage of the battery does not reach the rated value, the battery is continuously charged.