CN215897338U - Double-battery charging and discharging structure and mobile terminal - Google Patents
Double-battery charging and discharging structure and mobile terminal Download PDFInfo
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- CN215897338U CN215897338U CN202121880103.3U CN202121880103U CN215897338U CN 215897338 U CN215897338 U CN 215897338U CN 202121880103 U CN202121880103 U CN 202121880103U CN 215897338 U CN215897338 U CN 215897338U
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Abstract
The utility model provides a double-battery charging and discharging structure and a mobile terminal. The dual battery charge and discharge structure includes: a first battery and a second battery; the battery selection circuit is connected with the first battery and the second battery and is used for carrying out charging or discharging operation on the appointed first battery or second battery according to the battery selection signal; the charging circuit is connected with the battery selection circuit and is used for providing a battery charging voltage for the battery selection circuit; and the control circuit is connected with the first battery, the second battery and the battery selection circuit and is used for outputting a battery selection signal to the battery selection circuit according to the detected electric quantity of the first battery and the second battery.
Description
Technical Field
The utility model relates to the technical field of mobile terminal charging and discharging, in particular to a double-battery charging and discharging structure and a mobile terminal.
Background
With the increasing processing capability and the increasing functions of portable terminal products, the power consumption of the terminal products is increasing, and therefore, the standby time becomes one of the key performance indexes of the products. Since the portable terminal device is limited in size and cannot extend the standby time simply by increasing the capacity of a single lithium battery, the dual battery power supply scheme is widely used and becomes a preferred scheme for extending the standby time. In the prior art, two batteries need to be respectively provided with one charging chip, and the two charging chips need to occupy a large amount of area of a main board. In addition, the two batteries lack discharge management, and the two batteries are in alternate discharge all the time when discharging, that is, which battery is high in voltage is discharged by which battery, so that the batteries are frequently discharged, stopped, re-discharged and re-stopped, and the service life of the batteries is shortened.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present invention provides a dual battery charging and discharging structure and a mobile terminal, which can improve the charging and discharging characteristics of the dual battery structure.
In one aspect, the present invention provides a dual battery charge and discharge structure, including:
a first battery and a second battery;
a battery selection circuit connected to the first battery and the second battery, for charging the first battery or the second battery designated by the battery selection signal using the battery charging voltage when the battery charging voltage is input, and for discharging the first battery or the second battery designated by the battery selection signal when the battery charging voltage is not input;
the charging circuit is connected with the battery selection circuit and used for providing the battery charging voltage for the battery selection circuit when a charging power supply is externally connected;
and the control circuit is connected with the first battery, the second battery and the battery selection circuit and used for outputting the battery selection signal to the battery selection circuit according to the detected electric quantity of the first battery and the second battery.
Optionally, when the battery selection signal is at a low level, the first battery is designated as a target battery; and when the battery selection signal is at a high level, designating the second battery as the target battery.
Optionally, in a charging state, the control circuit is configured to output a low-level battery selection signal to designate the first battery as a target battery when it is detected that the electric quantity of the first battery is greater than the electric quantity of the second battery, and output a high-level battery selection signal to designate the second battery as the target battery when the electric quantity of the first battery is greater than a first threshold;
in a discharging state, the control circuit is configured to output a low-level battery selection signal to designate the first battery as a target battery when it is detected that the electric quantity of the first battery is greater than the electric quantity of the second battery, and output a high-level battery selection signal to designate the second battery as the target battery when the electric quantity of the first battery is less than a second threshold.
Optionally, the control circuit is connected to the charging circuit, and the control circuit is configured to detect whether the charging circuit is externally connected to a charging power supply, so as to determine that the dual-battery charging and discharging structure is currently in a charging state or a discharging state.
Optionally, the control circuit and the charging circuit are connected by an SMBUS bus.
Optionally, the control circuit is connected to the first battery and the second battery through SMBUS buses, respectively.
Optionally, the battery selection circuit includes a battery selection chip, and a model of the battery selection chip is MAX 1538.
Optionally, the charging circuit includes a charging chip, and the model of the charging chip is BQ 24735.
Optionally, the control circuit comprises an embedded controller chip.
In another aspect, the present invention provides a mobile terminal including the above dual battery charging and discharging structure.
According to the double-battery charging and discharging structure provided by the utility model, the electric quantity of the two batteries is detected through the control circuit, and the charging sequence and the discharging sequence of the batteries are controlled through the battery selection circuit, so that the frequent charging and discharging of the batteries are avoided, and the service life of the batteries is greatly prolonged. The charge and discharge electric quantity of the other two batteries can be intelligently adjusted through the control circuit, and the controllability is high. In addition, only one charging chip is needed, and although one battery selection chip is added, the area of the main board can be saved compared with two charging chips.
Drawings
Fig. 1 is a schematic structural diagram of a dual battery charging and discharging structure according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 is a schematic structural diagram illustrating a dual battery charging and discharging structure according to an embodiment of the present invention. As shown in fig. 1, the dual battery charge and discharge structure includes: the battery selection circuit comprises a first battery 101, a second battery 102, a battery selection circuit 103, a charging circuit 104 and a control circuit 105, wherein an output end of the battery selection circuit 103 is connected with the first battery 101 and the second battery 102, an input end of the battery selection circuit 103 is used for inputting a battery charging voltage VBATT _ CHG, and specifically, the battery selection circuit 103 is used for charging the first battery or the second battery specified by a battery selection signal by using the battery charging voltage VBATT _ CHG when the battery charging voltage VBATT _ CHG is input, and is also used for discharging the first battery or the second battery specified by the battery selection signal when the battery charging voltage VBATT _ CHG is not input. The charging circuit 104 is connected to the battery selection circuit 103, and is configured to provide the battery charging voltage VBATT _ CHG to the battery selection circuit 103 when a charging power source is externally connected. The control circuit 105 is connected to the first battery 101, the second battery 102 and the battery selection circuit 103, and is configured to detect the electric quantities of the first battery 101 and the second battery 102, and output a battery selection signal to the battery selection circuit 103 according to the detected electric quantities of the first battery 101 and the second battery 102.
In the dual-battery charging and discharging structure of the embodiment, the control circuit detects the electric quantity of the two batteries and outputs a battery selection signal to the battery selection circuit, the battery selection circuit charges the specified first battery or second battery when the external charging power supply exists according to the battery selection signal, and if the external charging power supply does not exist, the battery selection circuit is in a discharging state and discharges the specified first battery or second battery according to the battery selection signal, so that the purpose of dual-battery charging and discharging management is achieved. In the scheme, only one battery is charged at the same time, and the battery cannot be discharged during charging, the load power consumption is directly obtained from the charging power supply during charging, and the battery discharges when no external charging power supply exists.
Further, the control circuit 105 is connected to the first battery 101 and the second battery 102 through the SMBUS bus, and then the control circuit 105 can detect the electric quantities of the two batteries.
Further, the battery selection signal output by the control circuit 105 is a level signal, which can be defined as follows: when the battery selection signal is at a low level, designating the first battery as a target battery; when the battery selection signal is high, the second battery is designated as the target battery.
In a specific implementation, how the control circuit 105 controls the level of the battery selection signal can be defined according to actual needs. For example, in the charging state, the control circuit 105 is configured to output a low-level battery selection signal to designate the first battery as the target battery when it is detected that the capacity of the first battery is greater than the capacity of the second battery, and to output a high-level battery selection signal to designate the second battery as the target battery when the capacity of the first battery is greater than a first threshold; in the discharging state, the control circuit is used for outputting a low-level battery selection signal to designate the first battery as the target battery when the electric quantity of the first battery is detected to be larger than that of the second battery, and outputting a high-level battery selection signal to designate the second battery as the target battery when the electric quantity of the first battery is smaller than a second threshold.
Further, the control circuit 105 and the charging circuit 104 may be connected through an SMBUS bus, and the control circuit 105 is configured to detect whether the charging circuit 104 is externally connected to a charging power source, so as to determine that the dual-battery charging and discharging structure is currently in a charging state or a discharging state. It should be noted that the control circuit 105 may respectively define how to output the battery selection signal when the dual battery charging and discharging structure is in two different states, namely, a charging state and a discharging state.
As a specific implementation, the battery selection circuit 103 may include a battery selection chip, with a model of MAX1538, and the battery selection circuit 103 is built based on the battery selection chip. The charging circuit 104 may include a charging chip, model number BQ24735, on the basis of which the charging circuit 104 is built. The control circuit 105 may be built using an embedded controller chip.
On the other hand, the embodiment of the utility model also provides a mobile terminal, which comprises the double-battery charging and discharging structure.
The above description is only for the specific 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 (10)
1. A dual battery charge-discharge structure, comprising:
a first battery and a second battery;
a battery selection circuit connected to the first battery and the second battery, for charging the first battery or the second battery designated by the battery selection signal using the battery charging voltage when the battery charging voltage is input, and for discharging the first battery or the second battery designated by the battery selection signal when the battery charging voltage is not input;
the charging circuit is connected with the battery selection circuit and used for providing the battery charging voltage for the battery selection circuit when a charging power supply is externally connected;
and the control circuit is connected with the first battery, the second battery and the battery selection circuit and used for outputting the battery selection signal to the battery selection circuit according to the detected electric quantity of the first battery and the second battery.
2. The dual-battery charge and discharge structure of claim 1, wherein the first battery is designated as a target battery when the battery selection signal is at a low level; and when the battery selection signal is at a high level, designating the second battery as the target battery.
3. The dual-battery charge-discharge structure of claim 2, wherein in the charging state, the control circuit is configured to output a low-level battery selection signal to designate the first battery as the target battery when it is detected that the charge level of the first battery is greater than the charge level of the second battery, and to output a high-level battery selection signal to designate the second battery as the target battery when the charge level of the first battery is greater than a first threshold;
in a discharging state, the control circuit is configured to output a low-level battery selection signal to designate the first battery as a target battery when it is detected that the electric quantity of the first battery is greater than the electric quantity of the second battery, and output a high-level battery selection signal to designate the second battery as the target battery when the electric quantity of the first battery is less than a second threshold.
4. The dual-battery charging and discharging structure of claim 1, wherein the control circuit is connected to the charging circuit, and the control circuit is configured to detect whether the charging circuit is externally connected to a charging power source, so as to determine whether the dual-battery charging and discharging structure is currently in a charging state or a discharging state.
5. The dual battery charge and discharge structure of claim 4, wherein the control circuit and the charging circuit are connected through an SMBUS bus.
6. The dual-battery charge and discharge structure of claim 1, wherein the control circuit is connected to the first battery and the second battery through SMBUS buses, respectively.
7. The dual-battery charging and discharging structure of claim 1, wherein the battery selection circuit comprises a battery selection chip, and the model of the battery selection chip is MAX 1538.
8. The dual battery charge and discharge structure of claim 1, wherein the charging circuit comprises a charging chip having a model number BQ 24735.
9. The dual battery charge and discharge structure of claim 1, wherein the control circuit includes an embedded controller chip.
10. A mobile terminal, characterized in that the mobile terminal comprises the dual battery charging and discharging structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121880103.3U CN215897338U (en) | 2021-08-11 | 2021-08-11 | Double-battery charging and discharging structure and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121880103.3U CN215897338U (en) | 2021-08-11 | 2021-08-11 | Double-battery charging and discharging structure and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215897338U true CN215897338U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121880103.3U Active CN215897338U (en) | 2021-08-11 | 2021-08-11 | Double-battery charging and discharging structure and mobile terminal |
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| CN (1) | CN215897338U (en) |
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- 2021-08-11 CN CN202121880103.3U patent/CN215897338U/en active Active
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