CN101364654A

CN101364654A - Rechargeable battery and wireless terminal with same

Info

Publication number: CN101364654A
Application number: CNA2008102162819A
Authority: CN
Inventors: 魏孔刚; 刘海龙; 张同邦
Original assignee: Huawei Device Co Ltd
Current assignee: Huawei Device Co Ltd
Priority date: 2008-09-19
Filing date: 2008-09-19
Publication date: 2009-02-11

Abstract

The embodiment of the invention provides a rechargeable battery, which is integrated with a charging interface, a charging management circuit and a protection circuit, and directly connected with a direct-current power supply to charge the rechargeable battery without other devices such as a terminal and a charging seat. The charging is convenient and fast, and the manufacturing cost can be saved due to the integration of the functional circuits.

Description

Rechargeable battery and wireless terminal with same

Technical Field

The invention relates to a battery, in particular to a rechargeable battery.

Background

The appearance of mobile phones and other communication terminals enables people to send information and communicate with other people at any time and any place without being restricted by places. The development of mobile phones and other mobile terminals has relied upon the development of its cellular accessories and the expansion of battery functionality. Common batteries for mobile phones are: nickel-metal hydride batteries, nickel-cadmium batteries, lithium ion batteries, and the like. The diversification of mobile terminal products causes the variety of batteries to be extremely diverse, and the batteries of the current mobile terminal products can not be charged by a special charger and terminal equipment. Thus, battery charging is greatly restricted.

Disclosure of Invention

The embodiment of the invention provides a rechargeable battery convenient to charge.

The rechargeable battery provided by the embodiment of the invention is provided with a charging interface; the charging management circuit is connected with the charging interface, performs voltage conversion and current control on externally input current, and outputs current meeting the charging requirement of the battery cell; charging the battery cell; the protection circuit is connected between the charging management circuit and the battery cell in series; an output port; the protection circuit is connected with the battery cell to supply power to external equipment; and the battery shell is packaged on the surface of the battery to protect the internal circuit and the battery core.

An embodiment of the present invention further provides a terminal having a rechargeable battery, including: the battery accommodating groove is used for accommodating a battery therein; a rechargeable battery disposed in the battery receiving groove, the battery further including: a charging interface; the charging management circuit is connected with the charging interface, performs voltage conversion and current control on externally input current, and outputs current meeting the charging requirement of the battery cell; charging the battery cell; the protection circuit is connected in series between the charging management circuit and the battery cell; an output port; the protection circuit is connected with the battery cell to supply power to external equipment; and the battery shell is packaged on the surface of the battery to protect the internal circuit and the battery core.

The rechargeable battery provided by the embodiment of the invention can be directly connected with the direct-current power supply through the patch cord to charge the rechargeable battery without other equipment, such as a terminal, a charging seat and the like. The charging is convenient and quick, and the manufacturing cost is saved due to the integration of the functional circuits

Drawings

FIG. 1 is a schematic diagram of an internal structure of a rechargeable battery according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of another embodiment of a rechargeable battery according to the present invention;

FIG. 3 is a schematic diagram of a rechargeable battery according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a connection between a rechargeable battery and an external power source via a patch cord according to an embodiment of the present invention.

Detailed Description

Referring to fig. 1, an embodiment of the present invention provides a rechargeable battery, which integrates a charging interface 11, a charging management circuit 21, and a protection circuit 31, so as to directly connect a dc power supply to charge the rechargeable battery without using other devices, such as a terminal and a charging dock. The charging is convenient and fast, and the manufacturing cost can be saved due to the integration of the functional circuits.

The rechargeable battery provided by the embodiment of the invention is provided with a charging interface 11, which can be a standard 2.0mm direct plug-in DC interface, and can also adopt a MiniUSB interface or other self-defined interface types. The interface is arranged on the rechargeable battery body and can be electrically connected with the external connector in an inserting mode. The internal structure of the charging interface, the design and installation of the conductive elastic sheet, and the like are not repeated

The charging management circuit 21 is electrically connected to the charging interface 11, and the charging management circuit 21 is a DC-DC circuit. The DC-DC circuit is small in size and suitable for being integrated in a battery. The charging management circuit can adopt a charging management IC, such as a nickel-hydrogen charging management IC, a lithium battery charging management IC and the like. The charge management circuit 21 performs voltage conversion and current control on an externally input current, and outputs a current that satisfies the charge requirement of the battery cell 51. Such as converting the incoming DC to 4.2V, which can charge the battery. Specifically, the charge management needs to be designed according to the charging characteristics of the rechargeable battery. The rechargeable battery can be a nickel-metal hydride battery, a lithium battery and the like according to different charging media. The following description will be made by taking a lithium battery as an example. Because lithium batteries have no memory effect, lithium batteries are currently used for supplying power in various handheld devices and portable electronic products. According to the charging characteristics of the lithium battery. The charging process is generally divided into three processes: 1. a trickle charge phase. The method is suitable for the battery in the states of transition discharge and low voltage. Lithium batteries typically drop below 3.0V after a transient discharge. Some physical changes may occur to the medium inside the lithium battery, resulting in deterioration of charging characteristics, reduction in capacity, and the like. In this stage, the lithium battery can only be slowly charged by the trickle, and the dielectric medium in the lithium battery is slowly restored to the normal state. 2. And (5) a constant current charging stage. The trickle charging device is suitable for the battery to recover to a normal state from an over-discharge state, and after the trickle charging stage, the dielectric medium inside the battery can bear larger charging current, so that the outside can charge the lithium battery through a larger current at the time, and the charging time is shortened. The charging current at this stage is generally determined by connecting a resistor to a pin external to the charge management IC. The resistance value is calculated according to a formula on the datasheet of the charge management IC. 3. The constant voltage charging stage is suitable for the stage of charging more than 85% and slowly replenishing. When the capacity of the lithium battery reaches 85% (about value), the slow charge stage must be entered again. The voltage is slowly raised. And finally the maximum voltage of the lithium battery is 4.2V. The battery charging management circuit using other media will not be described herein.

The charging core 51 is an electrical storage medium, and currently, there are a nickel-cadmium battery, a nickel-hydrogen battery, a lithium ion battery, a secondary alkaline zinc-manganese battery, and the like, according to the difference of the electrical storage medium. At present, the terminal electronic products use more nickel-hydrogen batteries and lithium ion batteries, and attention needs to be paid to the fact that different charging management schemes are selected when different types of batteries are selected.

The protection circuit 31 is connected in series between the charge management circuit 21 and the battery cell 51, and the protection circuit 51 has functions of over-charge, over-discharge and over-current protection, for example, when the voltage of the battery is generally 4.2v after the battery is fully charged, the loop is automatically disconnected when the battery voltage is detected to be higher than 4.2v, or the loop is automatically disconnected when the battery voltage is too low, so as to protect the battery. And the battery cell 51 is protected.

Further, referring to fig. 2 and 3, the rechargeable battery 100 has a battery charging status indication unit 22 connected to the battery management circuit 21, and indicates the battery charging status through an indication lamp according to the battery status, such as red when an external dc source is input, and green when the battery charging status is full.

Referring to fig. 3, the rechargeable battery 100 according to the embodiment of the present invention further has an output port 41; and the protection circuit 31 is connected with the battery cell 51, so that power supply to external equipment is realized. The connection to the external device may take the form of a terminal. The battery 100 according to the embodiment of the present invention further includes a battery case (not shown) that is encapsulated on the surface of the battery to protect the internal circuit and the battery cell.

Referring to fig. 4, the rechargeable battery 100 according to the embodiment of the present invention is plugged into an external patch cord 200 through a charging interface 21, and the other end of the external patch cord 200 is connected to a DC power supply, specifically, one end of the patch cord 200 may be a standard 2.0mm direct-insertion DC interface or other connector that is matched with the charging interface 11. The other end can be a USB interface which is inserted with the USB interface of the computer to obtain the power supply.

The rechargeable battery 100 is placed in a battery receiving groove of the wireless terminal when in use. The electrical connection is made to the wireless terminal through the terminal of the output port 41.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A rechargeable battery, comprising:

a charging interface;

the charging management circuit is electrically connected with the charging interface, performs voltage conversion and current control on externally input current, and outputs the current meeting the charging requirement of the battery cell;

charging the battery cell;

the protection circuit is connected in series between the charging management circuit and the battery cell;

an output port; the protection circuit is connected with the battery cell to supply power to external equipment;

and the battery shell is packaged on the surface of the battery to protect the internal circuit and the battery core.

2. The rechargeable battery according to claim 1, wherein the charging interface is a standard 2.0mm direct-insert DC interface, a MiniUSB interface.

3. The rechargeable battery of claim 1, wherein the charging interface is a custom interface.

4. The rechargeable battery according to claim 1, further comprising a charge status indicating circuit connected to the charge management circuit and indicating the charge status through an indicator lamp.

5. The rechargeable battery according to claim 1, wherein the charge management circuit is a DC-DC circuit.

6. The rechargeable battery according to claim 1, wherein the output port has an output terminal connected to an external device for supplying power to the external device.

7. A terminal having a rechargeable battery, comprising:

the battery accommodating groove is used for accommodating a battery;

a rechargeable battery disposed in the battery receiving groove, the battery further comprising: a charging interface;

the charging management circuit is connected with the charging interface, performs voltage conversion and current control on externally input current, and outputs current meeting the charging requirement of the battery cell;

charging the battery cell;