CN104967170B - Mobile power - Google Patents

Abstract

The present invention relates to a mobile power supply, including a battery, and further comprising: a first interface, used for electrical connection with external equipment; a first monitoring circuit, electrically connected with the first interface, for monitoring the external equipment charging and discharging properties and output; the second monitoring circuit is electrically connected to the battery, and is used to monitor and output the current power of the battery; the control circuit is electrically connected to the first monitoring circuit and the second monitoring circuit respectively A connection is used for controlling whether to perform power transmission between the mobile power supply and the external device according to the charging and discharging properties and the current capacity of the battery. In the above mobile power supply, the first interface can be used as both an input interface and an output interface, which improves the utilization rate of the device.

Description

mobile power

technical field

The invention relates to the technical field of power supplies, in particular to a mobile power supply.

Background technique

As an energy supply device for electronic equipment, mobile power is widely used for its portability. The interface function of the traditional mobile power supply is relatively single, which is not conducive to improving the utilization rate of the equipment.

Contents of the invention

Based on this, it is necessary to provide a mobile power supply with high equipment utilization rate to address the above problems.

A mobile power supply, including a battery, and further comprising: a first interface, electrically connected to an external device; a first monitoring circuit, electrically connected to the first interface, for monitoring the charging and discharging properties of the external device and output; the second monitoring circuit is electrically connected to the battery, and is used to monitor and output the current power of the battery; the control circuit is electrically connected to the first monitoring circuit and the second monitoring circuit respectively, It is used for controlling whether to perform power transmission between the mobile power supply and the external device according to the charging and discharging properties and the current capacity of the battery.

In one of the embodiments, the charge and discharge attributes include charge attributes and discharge attributes; the control circuit controls the The mobile power supply enters the discharge mode, and the external device is charged by the mobile power supply; the control circuit controls the The mobile power supply enters a charging mode, and the external device charges the mobile power supply.

In one of the embodiments, the control circuit is also used to switch the mobile power supply to the corresponding charging and discharging properties when controlling the mobile power supply to enter the charging mode or the discharging mode.

In one of the embodiments, it also includes a voltage conversion circuit, which is electrically connected to the control circuit and the battery respectively; the first monitoring circuit is also used to monitor the power supply voltage of the external device; the control circuit is also It is used to generate a discharge command according to the power supply voltage when the mobile power supply is in the discharge mode; the voltage conversion circuit is used to convert the output voltage of the battery into the power supply voltage of the external device according to the discharge command Charge the external device.

In one of the embodiments, the control circuit is also used to generate a charging command according to the power supply voltage when the mobile power supply is in charging mode; the voltage conversion circuit is also used to convert the external The power supply voltage output by the device is converted into the charging voltage of the battery to charge the mobile power supply.

In one of the embodiments, the control circuit is also used to monitor whether the first monitoring circuit is working normally, and control the voltage converting circuit to stop working when the first monitoring circuit is not working normally.

In one of the embodiments, it also includes: an output interface, used to electrically connect with the mobile electronic device whose charging and discharging attribute is charging attribute; a third monitoring circuit, electrically connected to the output interface, and used to monitor the mobile electronic device connected to the charging attribute. The power supply voltage of the mobile electronic device of the output interface; the control circuit is also used to generate a discharge instruction according to the power supply voltage monitored by the third monitoring circuit and output it to the voltage conversion circuit.

In one of the embodiments, the output interface is a 5V voltage output interface.

In one of the embodiments, the first interface is a USB Type-C interface.

In one of the embodiments, a protection circuit is further included, electrically connected to the battery, for protecting the battery from overcurrent, overvoltage, short circuit, overcharge and overdischarge.

The first interface in the above-mentioned mobile power supply can be connected with an external device whose charging and discharging property is a charging property or a discharging property. The first monitoring circuit monitors the charging and discharging properties of the connected external device, so that the control circuit can determine whether to perform power transmission between the mobile power supply and the connected device according to the monitored charging and discharging properties and the current power of the battery, that is Whether the mobile power supply is used to discharge the external device or the connected external device is used to charge the mobile power supply. In the above mobile power supply, the first interface can be used as both an input interface and an output interface, which improves the utilization rate of the device.

Description of drawings

Fig. 1 is a functional block diagram of a mobile power supply in an embodiment;

Fig. 2 is a functional block diagram of a mobile power supply in another embodiment;

Fig. 3 is the circuit schematic diagram of the voltage conversion circuit of the mobile power supply in a specific embodiment;

Fig. 4 is the circuit principle diagram of the control circuit of the mobile power supply in the embodiment shown in Fig. 3;

FIG. 5 is a schematic circuit diagram of the protection circuit of the mobile power supply in the embodiment shown in FIG. 3 .

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

1 is a functional block diagram of a mobile power supply in an embodiment, which includes a battery 110 , a first interface 120 , a first monitoring circuit 130 , a second monitoring circuit 140 , a control circuit 150 and a voltage conversion circuit 160 .

The battery 110 is used as an energy storage unit to store energy. The battery 110 may be a single lithium battery or a lithium battery pack formed of a plurality of lithium batteries.

The first interface 120 is used for connecting with external devices. The external device can be an electronic device to be charged or an energy supply device. The charging and discharging attributes of electronic devices to be charged (such as mobile phones, tablets, digital cameras, etc.) are charging attributes, and the charging and discharging attributes of energy supply devices (such as power adapters, etc.) are discharging attributes. Therefore, the first interface 120 can be used as both an input interface and an output interface, so that the needs of users at different times can be met, and the utilization rate of the device can be improved. In this embodiment, the first interface 120 is a USB Type-C interface.

The first monitoring circuit 130 is connected with the first interface 120, and is used for monitoring the charging and discharging attributes of the external devices connected to the first interface 120 and outputting the attributes. For example, when the connected device is an electronic device to be charged, the first monitoring circuit 130 reads its charging property and outputs it to the control circuit 150 after shaking hands with it. In this embodiment, the first monitoring circuit 130 is also used to monitor the power supply voltage of the connected external device. The power supply voltage of the external device may be the power supply voltage provided by the external device to the mobile power supply, or the power supply voltage provided by the mobile power supply to the external device.

The second monitoring circuit 140 is connected with the battery 110 and is used for real-time monitoring of the current power of the battery 110 and outputting the current power. The power of the battery 110 is monitored by the second monitoring circuit 140 , so that the problems of overcharging and overdischarging of the battery 110 can be effectively avoided.

The control circuit 150 is connected to the first monitoring circuit 130 and the second monitoring circuit 140 respectively. The control circuit 150 is configured to receive the charge and discharge properties output by the first monitoring circuit 130 and the current power level of the battery 110 output by the second monitoring circuit 140 . The control circuit 150 controls whether to perform power transmission between the mobile power supply and the external device according to the received charging and discharging properties and the current capacity of the battery 110 . Specifically, when the charge-discharge attribute of the external device is the charging attribute and the current power of the battery 110 is greater than the minimum discharge power, the control circuit 150 controls the mobile power supply to enter the discharge mode, and the mobile power supply charges the external device. When the charging and discharging property of the external device is the charging property and the current power of the battery 110 is less than or equal to the minimum discharge power, the control circuit 150 will reject the power transmission request of the external device, that is, control the power transfer between the mobile power supply and the external device. When the charging and discharging property of the external device is the discharging property and the current power of the battery 110 is less than the maximum charging power, the control circuit 150 controls the mobile power to enter the charging mode, and the external device charges the mobile power. When the charging and discharging property of the external device is the discharging property and the current power of the battery 110 is greater than or equal to the maximum charging power, the control circuit 150 will reject the power transmission request of the external device, that is, control the power transfer between the mobile power supply and the external device.

When the control circuit 150 controls the mobile power supply to enter the discharge mode, it will switch its own charge and discharge properties to discharge properties. The control circuit 150 generates a discharge instruction according to the power supply voltage of the external device monitored by the first monitoring circuit 130 and outputs it to the voltage conversion circuit 160 . The voltage conversion circuit 160 converts the voltage of the battery 110 according to the discharge instruction, and converts the voltage into a power supply voltage required by the external device, and then outputs it to the connected external device through the first interface 120 . In this embodiment, the voltage conversion circuit 160 can convert the voltage of the battery 110 into one of three voltages of 5V, 12V, and 20V according to the requirements of external devices, so as to realize the multi-voltage output of the first interface 120, so as to satisfy different power supply requirements. Voltage requirements for external devices further increase device utilization.

When the control circuit 150 controls the mobile power supply to enter the charging mode, it will switch its own charging and discharging properties to the charging property, and the control circuit 150 will generate a charging command according to the power supply voltage of the external device monitored by the first monitoring circuit 130 and output it to the voltage Conversion circuit 160. The voltage conversion circuit 160 converts the power supply voltage output by the external device according to the charging instruction, and converts it into a charging voltage acceptable to the battery 110 to charge the battery 110 . In this embodiment, the voltage conversion circuit 160 can convert various voltages output by the external device into the charging voltage of the battery 110 and then charge the battery 110, so as to realize the multi-voltage input of the first interface 120, so that energy sources with different supply voltages can be used. The device charges the mobile power, which improves the convenience of using the mobile power.

The control circuit 150 is also used to monitor whether the first monitoring circuit 130 is working normally, and to control the voltage conversion circuit 160 to stop working when the first monitoring circuit 130 cannot work normally, that is, to turn off the input and output of the mobile power supply, thereby ensuring the power bank's Safe to use.

The first interface 120 in the above-mentioned mobile power supply can be connected with an external device whose charging and discharging properties are charging properties or discharging properties. The first monitoring circuit 130 monitors the charging and discharging properties of the connected external device, so that the control circuit 150 can determine whether to perform power transmission between the mobile power supply and the connected device according to the monitored charging and discharging properties and the current power level of the battery , that is, whether the mobile power supply discharges to the external device or whether the connected external device charges the mobile power supply. In the above mobile power supply, the first interface 120 can be used as both an input interface and an output interface, which improves the utilization rate of the device. The first interface 120 in the mobile power supply can support multi-voltage input and multi-voltage output, so that it can supply power for different types of electronic devices or be charged by different types of energy supply devices, thereby improving the universality of the device It can meet the needs of users to the greatest extent and improve the convenience in the process of use.

2 is a mobile power supply in another embodiment, which includes a battery 202, a first interface 204, a first monitoring circuit 206, a second monitoring circuit 208, a control circuit 210 and a voltage conversion circuit 212, and also includes an output interface 214, a second monitoring circuit Three monitoring circuit 216 , protection circuit 218 and display circuit 220 . Wherein, the parts of the battery 202 , the first interface 204 , the first monitoring circuit 206 , the second monitoring circuit 208 , the control circuit 210 and the voltage conversion circuit 212 that have been introduced in the foregoing embodiments will not be repeated here.

The output interface 214 is used to connect with the mobile electronic device whose charging and discharging property is the charging property, that is, the output interface 214 is only used as an output interface. In this embodiment, the output interface 214 is a USB A type interface or a USB B type interface, and its output is a current of 5V/1A or 5V/2A. There are multiple output interfaces 214, so that multiple mobile electronic devices can be charged at the same time.

The third monitoring circuit 216 is connected to the output interface 214 for monitoring the power supply voltage of the mobile electronic device connected to the output interface 214 and outputting it to the control circuit 210 . The control circuit 210 generates a discharge instruction according to the input power supply voltage and outputs it to the voltage conversion circuit 212 . The voltage conversion circuit 212 converts the voltage of the battery 202 to charge the connected mobile electronic device through the output interface 214 .

The protection circuit 218 is connected with the battery 202 and is used to protect the battery 202 from overcurrent, overvoltage, short circuit, overcharge and overdischarge. The display circuit 220 is connected with the control circuit 210 and is used to display the working mode and power information of the mobile power, so that the user can grasp the specific situation of the mobile power in time. In this embodiment, the control circuit 210 also predicts and evaluates the remaining charging time or remaining discharging time according to the current charging and discharging state, and then displays it through the display circuit 220 for reference by the user. The display circuit 220 can display corresponding information through the bright states of multiple LED lights, and can also display relatively intuitively through an LED display or an LCD display.

Fig. 3 is the circuit principle diagram of the voltage conversion circuit of the mobile power supply in a specific embodiment; Fig. 4 is the circuit principle diagram of the control circuit of the mobile power supply in the embodiment shown in Fig. 3; Fig. 5 is the embodiment shown in Fig. 3 The circuit schematic diagram of the protection circuit of the mobile power supply. In this embodiment, the USB 1 interface is a USB C-type interface, and the USB2 is a 5V voltage output interface (USB A-type interface or USB B-type interface). Both U1 and U5 are voltage conversion chips for realizing voltage conversion. U2 is a control chip, which is used to control the entire working process of the mobile power supply. In this embodiment, the display circuit is composed of 4 light-emitting LEDs. When one light-emitting LED is on, it means that the power is between 25% and 0%; when two light-emitting LEDs are on, it means that the power is between 50% and 25%; When three light-emitting LEDs are on, it means that the power is between 75% and 50%; when all four light-emitting LEDs are on, it means that the power is between 100% and 75%. U4 is a protection chip.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (8)

1. A mobile power supply, comprising a battery, is characterized in that it also includes: The first interface is used for electrical connection with external equipment; The first monitoring circuit is electrically connected to the first interface, and is used to monitor and output the charging and discharging properties of the external device; specifically, the first monitoring circuit is used to connect to the first interface After the external device shakes hands, it reads the charging and discharging attributes of the external device and outputs its attributes; The second monitoring circuit is electrically connected to the battery, and is used to monitor and output the current power of the battery; The control circuit is electrically connected with the first monitoring circuit and the second monitoring circuit, and is used to control whether the mobile power supply and the external device are connected according to the charging and discharging properties and the current capacity of the battery. Power transmission between; the charging and discharging attributes include charging attributes and discharging attributes; The control circuit controls the mobile power supply to enter the discharge mode when the charge and discharge property of the external device is a charging property and the current power of the battery is greater than the minimum discharge power, and the mobile power supply charges the external device; The control circuit controls the mobile power supply to enter the charging mode when the charge and discharge property of the external device is a discharge property and the current power of the battery is less than the maximum charge power, and the external device charges the mobile power supply; The control circuit is also used to switch the mobile power supply to the corresponding charging and discharging properties when controlling the mobile power supply to enter the charging mode or the discharging mode. 2. The mobile power supply according to claim 1, further comprising a voltage conversion circuit electrically connected to the control circuit and the battery respectively; The first monitoring circuit is also used to monitor the power supply voltage of the external device; The control circuit is also used to generate a discharge instruction according to the power supply voltage when the mobile power supply is in discharge mode; the voltage conversion circuit is used to convert the output voltage of the battery into the external voltage according to the discharge instruction. The external device is charged after the supply voltage of the device. 3. The mobile power supply according to claim 2, wherein the control circuit is further configured to generate a charging command according to the power supply voltage when the mobile power supply is in a charging mode; The voltage conversion circuit is also used to convert the power supply voltage output by the external device into the charging voltage of the battery according to the charging instruction, and then charge the mobile power supply. 4. The mobile power supply according to claim 3, wherein the control circuit is also used to monitor whether the first monitoring circuit is working normally, and to control the voltage when the first monitoring circuit is not working normally. The switching circuit stops working. 5. The mobile power supply according to claim 3, further comprising: The output interface is used to electrically connect with the mobile electronic device whose charging and discharging properties are charging properties; A third monitoring circuit, electrically connected to the output interface, for monitoring the power supply voltage of the mobile electronic device connected to the output interface; The control circuit is further configured to generate a discharge instruction according to the power supply voltage monitored by the third monitoring circuit and output it to the voltage conversion circuit. 6. The mobile power supply according to claim 5, wherein the output interface is a 5V voltage output interface. 7. The mobile power supply according to claim 1, wherein the first interface is a USB Type-C interface. 8. The mobile power supply according to claim 1, further comprising a protection circuit electrically connected to the battery for protecting the battery from overcurrent, overvoltage, short circuit, overcharge and overdischarge .