TW201322589A - Smart electric power storage device - Google Patents

Abstract

The present invention discloses a smart electric power storage device. The smart electric power storage device includes a power supply transmission module, a charge circuit, a discharge circuit, a ground resistance, a detect module and a control module. A first connection port of the power supply transmission module is coupled with a positive power end of an electric device, and a second connection port of the power supply transmission module is connected to a ground end of the electric device. The charge circuit is configured to store the power from the electric device to the battery, and the discharge circuit is configured to transmit the power stored in the battery to the electric device. The ground resistance is electrically connected between the second connection port of the power supply transmission module and the ground end of the electric device, and the detect module is configured to measure the cross voltage of the ground resistance. When the cross voltage of the ground resistance is larger than a threshold value, the control module enables the charge circuit. When the cross voltage of the ground resistance is smaller than the threshold value, the control module enables the discharge circuit. Therefore, the electric power storage device can receive and output power by using the power supply transmission module.

Description

Intelligent power storage device

The invention relates to an energy storage device, and in particular to an intelligent power storage device coupled between an electronic device and various types of batteries.

In recent years, portable electronic devices such as mobile phones, digital cameras and flash drives with digital music functions have been widely used in our daily lives. These electronic devices are usually powered by their internal battery supply. However, after the battery is exhausted, it must be recharged. Many power storage devices are available on the market today as a backup power source for electronic devices and can be charged or discharged. However, no matter what kind of power storage device, when charging or discharging, the capacity, brand and type of the battery must be consistent and cannot be mixed, and even the manufacturing date is preferably close. In addition, the conventional power storage device often needs to be operated by a user by pressing a button or a slide switch, and the method is cumbersome. Moreover, conventional power storage devices consume more or less power from internal batteries.

Therefore, there is a need in the industry for an intelligent power storage device that can simultaneously have an automatic charging and discharging function, which not only needs to draw power from the battery, but also can store the power of the external power source in various types of batteries. . Thereby, the device does not need to be frequently replaced, so that it has the advantages of convenience and environmental protection, and can solve the above problems at the same time.

The invention provides an intelligent power storage device, which is different from the prior art in that only the same type of battery can be selected, or a button or a slide switch or the like must be used as a human-machine interface. The intelligent power storage device of the present invention can utilize the same universal serial bus (USB) port as the power input terminal for charging and the power output terminal for discharging. In addition to simplifying the design of the circuit to achieve a light, thin and short function, it can also be used as an intelligent power storage device for most electronic devices.

Embodiments of the present invention provide an intelligent power storage device including a power transmission module, a charging circuit, a discharging circuit, a grounding impedance, a detecting module, and a control module. The first connection end of the power transmission module is coupled to the positive power terminal of the electronic device, and the second connection end of the power transmission module is coupled to the ground end of the electronic device. The charging circuit is configured to receive power from the electronic device for storage in at least one battery, and the discharging circuit is configured to transmit power of the battery to the electronic device. The grounding impedance is coupled between the second connection end of the power transmission module and the ground end of the intelligent power storage device, and the detection module is configured to measure the detection voltage value at both ends of the ground impedance. When the detected voltage value is changed from greater than the threshold to equal to or less than the threshold, the control module will change from the charging state to the stop charging. When the detected voltage value is changed from less than the threshold to equal to or greater than the threshold, the control module will change from the discharged state to the stop discharging.

In an exemplary embodiment of the invention, the power storage device further includes a startup module. The startup module is coupled to the power transmission module, the control module and the battery, respectively, for selectively conducting the power input end of the control module to the first connection end or the battery. Here, the starting module may further include a conductive elastic piece and a field effect transistor. The source of the field effect transistor is coupled to the first connection end or the battery, the drain of the field effect transistor is coupled to the power input end, the gate of the field effect transistor is coupled to the conductive elastic piece, and the field effect electric The source of the crystal is electrically connected to the gate of the field effect transistor through the first resistor. When the electronic device is held in the power transmission module, the conductive elastic piece is electrically connected to the ground end of the power storage device to turn on the field effect transistor. When the electronic device is not clamped to the power transmission module, the voltage of the conductive dome and the gate of the field effect transistor are equal, so that the field effect transistor is turned off.

In summary, the power input end and the power output end of the intelligent power storage device provided by the present invention may be the same port or different ports. Compared with the previous intelligent power storage device, the circuit design can be simplified, and can be applied to the connection of most electronic devices, such as USB or iPhone, iPad, and the like. Therefore, the intelligent power storage device can be used as an emergency charging device for most electronic devices currently on the market, and has the advantages of being light and thin, and convenient to carry.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

[Embodiment of Intelligent Power Storage Device]

Referring to FIG. 1, FIG. 1 is a block diagram of an intelligent power storage device according to an embodiment of the invention. The smart power storage device 1 is coupled between the electronic device 2 and the battery 3 . The intelligent power storage device 1 includes a power transmission module 11 , a charging circuit 12 , a discharging circuit 13 , a grounding impedance 14 , a detecting module 15 , and a control module 16 . The electronic device 2 has a positive power terminal 21 and a ground terminal 22. Here, the ground terminal 22 of the electronic device 2 is connected to the common ground GND1 of the electronic device 2, and the smart power storage device 1 and the battery 3 are connected to the other common ground GND2. Hereinafter, each component of the smart power storage device 1 will be described in detail.

The power transmission module 11 has a first connection end 111 and a second connection end 112. The first connection end 111 is coupled to the positive power supply end 21 of the electronic device 2, and the second connection end 112 is coupled to the ground of the electronic device 2. End 22. In practice, the power transmission module 11 can be any common power connector on the market, such as a conventional USB connector, a mini USB connector, a 30-pin (30 pin) connector for an iPhone or iPad, and a DC jack. Or other suitable power connectors, so that those skilled in the art can select the mode of the power transmission module 11 by themselves. For example, the present invention herein is a universal serial bus (USB) port, an exemplary power transmission module 11 having at least two terminals for acquiring power to the electronic device 2.

The charging circuit 12 is coupled between the power transmission module 11 and the battery 3, and the charging circuit 12 provides a first current path for storing the power transmitted from the electronic device 2 to the battery 3. In a practical manner, the charging circuit 12 is coupled to the positive power terminal 21 of the electronic device 2 through the first connection end 111 of the power transmission module 11 for receiving power on the positive power terminal 21 of the electronic device 2. The charging circuit 12 further includes at least one rectifying circuit, which can first convert the power transmitted from the electronic device 2 into a constant current, and then charge the battery 3 with the constant current. The magnitude of the current value of the constant current can be determined by the user, and the invention is not limited herein.

For example, when the battery 3 is a general dry battery, the user can set the constant current to be a first current value, and when the battery 3 is a lithium battery, the user can set the constant current to a second current value. . Of course, the constant current may not change with the type of the battery, but has a fixed current value.

The same as the charging circuit 12 , the discharging circuit 13 is also coupled between the power transmission module 11 and the battery 3 . However, unlike the first current path provided by the charging circuit 12, the discharging circuit 13 provides a second current path between the power transmission module 11 and the battery 3 for transmitting the power of the battery 3 to the electronic device 2. In practice, the discharge circuit 13 can include a voltage conversion unit (not shown) that can change the voltage output to the electronic device 2 according to the power connector selected by the power transmission module 11, wherein the voltage conversion unit can include a voltage stabilization unit. The present invention is not limited herein, or a step-down unit or a boosting unit.

For example, when the power connector selected by the power transmission module 11 is a conventional USB connector, the discharge circuit 13 can convert the voltage output by the battery 3 into a +5V output, so that the electronic device 2 can receive the USB connector specification. Electricity. Here, if the voltage originally stored in the battery 3 is higher than +5 V, the discharge circuit 13 lowers the voltage stored in the battery 3 to +5 V in a step-down unit. On the other hand, if the voltage originally stored in the battery 3 is lower than +5 V, the discharge circuit 13 uses the boosting unit to raise the voltage stored in the battery 3 to +5 V. Of course, in order to keep the power transmission module 11 capable of transmitting a stable voltage to the electronic device 2, the discharge circuit 13 can further use the voltage stabilization unit after boosting or stepping down, so that the power transmission module 11 can maintain +5V. The output prevents the electronic device 2 from being damaged due to a drastic change in voltage.

The startup module 17 is used as a main switch of the smart power storage device 1 for selectively turning on the power of the first connection end 111 or the battery 3 to the control module 16 (for example, the power input end of the control module 16a). 161). In practice, the activation module 17 can be a button-type structure that allows the user to manually turn on or off the control module 16 of the smart power storage device 1. Preferably, the starting module 17 can be a structure as shown in FIG. 2 and FIG. 2 for automatically detecting whether the smart power storage device 1 has been connected to the electronic device 2.

Referring to FIG. 2, FIG. 2 is a circuit diagram of a boot module according to an embodiment of the present invention. In FIG. 2, the starting module 17a includes a field effect transistor Q1, a conductive spring piece S1, and a resistor R1.

In practice, the source of the field effect transistor Q1 can be coupled to the first connection end 111 (FIG. 2). The source of the field effect transistor Q1 may also be coupled to VCC. The drain of the field effect transistor Q1 is coupled to the power input terminal 161 of the control module 16. The gate of the field effect transistor Q1 is coupled to the conductive dome S1. In addition, the source of the field effect transistor Q1 is electrically connected to the gate of the field effect transistor Q1 through the resistor R1. The conductive elastic piece S1 is a structure disposed around the power transmission module 11. When the power transmission module 11 is a USB plug, the conductive elastic piece S1 can be connected at the end of the USB plug, when the electronic device 2 is held in the power When the module 11 is transported, the conductive elastic piece S1 can be pressed to contact the metal casing of the USB plug (that is, grounded). When the electronic device 2 is not held by the power transmission module 11, the conductive elastic piece S1 may extend slightly outward without contacting the metal casing of the USB plug.

In other words, when the electronic device 2 is held in the power transmission module 11, the conductive elastic piece S1 is electrically connected to the grounding end GND2 of the intelligent power storage device 1, and the source and field effect transistor of the field effect transistor Q1. There is a voltage difference between the gates of Q1, which in turn causes the field effect transistor Q1 to conduct. Here, the electronic device 2 can enable the field effect transistor Q1 to enable the control module 16 through the first connection terminal 111 or VCC, that is, high voltage (High). On the other hand, when the electronic device 2 is not clamped to the power transmission module 11, the conductive elastic piece S1 is suspended and opened, so that the voltage of the conductive elastic piece S1 and the gate of the field effect transistor Q1 are equal, and the field effect transistor Q1 shut down. Thereby, the first connection end 111 and the control module 16 are in a low voltage state that is not conductive.

In the present embodiment, the field effect transistor Q1 is substantially a P-type metal oxide half field effect transistor (PMOS). However, the present invention does not limit the type of field effect transistor Q1. It should be understood by those skilled in the art that the field effect transistor Q1 can be replaced with an N type as long as the connection mode of the circuit is appropriately changed. Gold oxide half field effect transistor (NMOS) or bipolar junction transistor (BJT). Here, the activation module 17a of FIG. 2 illustrates an implementation of a positive edge trigger control module 16, although the invention is not limited thereto. Please refer to FIG. 3. FIG. 3 is a circuit diagram of a boot module according to another embodiment of the present invention. As shown in FIG. 3, the starting module 17b may further include a conductive elastic piece S1 for negative edge triggering. Here, when the electronic device 2 is held by the power transmission module 11, the electronic device 2 will push the conductive elastic piece S1, so that the electrical properties of the conductive elastic piece S1 will be connected to the intelligent power storage device from the non-polar state (empty state). The common ground GND2 of 1 is used to quickly pull down the voltage of the power input terminal 161 of the control module 16 to achieve the automatic startup of the negative edge enable.

In other words, whether the startup module 17a in FIG. 2 or the startup module 17b in FIG. 3, the design of the smart power storage device 1 can be automatically activated. Thereby, when the smart power storage device 1 is completely powered off (no power consumption), the present invention can restart the smart power storage device 1 through the startup module (17a or 17b) and return to a chargeable or discharged state. . It should be noted that the intelligent power storage device 1 of the present invention is activated by the automatic detection of the activation module (17a or 17b), so that the smart power storage device 1 can be manually turned on without using a button, a switch or the like. Of course, the smart power storage device 1 of the present invention can also additionally configure buttons and switches to provide a user to manually activate the smart power storage device 1.

In addition, the intelligent power storage device 1 of the present invention can also automatically shut down when not in use to save battery power. In detail, the control module 16 can learn from the detection module that the power transmission module 11 is receiving power or discharging power to make corresponding control, such as charging, discharging, or automatically entering completely no power consumption. Shutdown state to save a lot of power stored in the battery. If the circuit that is to be turned off is to be awakened, the startup module (17a or 17b) is used for the purpose.

On the other hand, in addition to the above-described starting module 17a or the starting module 17b, the starting module can have a variety of variations. For example, FIG. 4 to FIG. 7 are circuit diagrams of various implementations of the startup module, in which a feature of the reference voltage Vref is added, thereby allowing the activated voltage enable level to follow the reference voltage Vref. Different, in turn, produces a different level than the system voltage VCC. Of course, the present invention is not limited thereto, and those skilled in the art can convert the startup module into a similar design as needed.

4, from the perspective of the actuation mode of the starting module 17c, when the conductive elastic piece S1 is not touched and opened, the capacitance C is fully charged and is substantially equal to the system voltage VCC. At this time, the voltage of the power input terminal 161 of the control module 16 will be relatively low voltage level. When the conductive elastic piece S1 is short-circuited by the touch, the capacitor C is discharged, and when the input voltage of the negative terminal of the comparator 170 is lower than the reference voltage Vref, the voltage of the power input terminal 161 of the control module 16 is relatively high. quasi. That is to say, the starting module 17c is equivalent to a positive or positive edge trigger having a delay action. If the startup module 17c is designed to have no delay function, it is of course possible to eliminate the design of the capacitor C by those skilled in the art, and the invention is not limited thereto.

As shown in FIG. 5, from the operation mode of the starting module 17d, when the conductive elastic piece S1 is not touched and opened, the voltage of the capacitor C is relatively low voltage level (about equal to the sharing of the intelligent power storage device 1). Ground GND2). At this time, the voltage of the power input terminal 161 of the control module 16 is substantially equal to the system voltage VCC. When the conductive elastic piece S1 is short-circuited by the touch, the capacitor C is charged, and when the input voltage of the negative terminal of the comparator 170 is higher than the reference voltage Vref, the voltage of the power input terminal 161 of the control module 16 is relatively low. quasi. That is to say, the starting module 17d is equivalent to a negative or negative edge trigger having a delay action. Similarly, if the startup module 17d is designed to have no delay function, those skilled in the art can of course cancel the design of the capacitor C, which is not limited herein.

As shown in FIG. 6, when the electronic device 2 is not connected to the smart power storage device 1 through the first connection end 111 (for example, a pin of a USB or an iPhone), the comparator 170 is viewed from the operation mode of the startup module 17e. The negative terminal inputs a zero voltage (corresponding to the voltage of the common ground GND2), and at this time, the voltage of the power input terminal 161 of the control module 16 is at a high voltage level. On the other hand, if the electronic device 2 has supplied a positive voltage to the smart power storage device 1 through the first connection terminal 111, the capacitor C starts to be charged. When the voltage of the capacitor C is higher than the reference voltage Vref, the voltage of the power input terminal 161 of the control module 16 at this time is relatively low. Similarly, if the startup module 17e is designed to have no delay function, those skilled in the art can of course cancel the design of the capacitor C, which is not limited herein.

7, the difference between the starting module 17f and the starting module 17e is that the input pins of the comparator 170 are different from the operating mode of the starting module 17f. In the startup module 17f, if the electronic device 2 has not been connected to the smart power storage device 1 through the first connection end 111 (for example, a USB or iPhone pin), the negative input of the comparator 170 is a high voltage level. At this time, the voltage of the power input terminal 161 of the control module 16 is a low voltage level. On the other hand, if the electronic device 2 has supplied a positive voltage to the smart power storage device 1 through the first connection terminal 111, the capacitor C starts to discharge via R3. When the voltage of the capacitor C is lower than the reference voltage Vref, the voltage of the power input terminal 161 of the control module 16 at this time is relatively high voltage level. Similarly, if the startup module 17f is designed to have no delay function, those skilled in the art can of course cancel the design of the capacitor C, which is not limited herein.

Referring to FIG. 1 , the grounding impedance 14 is connected between the common ground GND1 of the electronic device 2 and the common ground GND2 of the smart power storage device 1 and the battery 3. After the power transmission module 11 is indeed coupled to the electronic device 2 to form a complete current loop, the grounding impedance 14 can ride the current and have a voltage across it, thereby making the common ground GND1 and the common ground GND2 The voltages are not equal.

The detection module 15 is coupled to the ground impedance 14 for detecting a voltage across the ground impedance 14 to generate a detected voltage value. For example, the detection module 15 can be a voltage detector connected in parallel to the terminal A and the terminal B of the ground impedance 14 for measuring the voltage across the ground impedance 14.

The control module 16 is coupled to the charging circuit 12, the discharging circuit 13, and the detecting module 15 for determining when the voltage value is detected to determine a charging or discharging state. In practice, the control module 16 can be a microcontroller (MCU) for selectively enabling the charging circuit 12 or the discharging circuit 13.

For the configuration of the detection module 15, refer to FIG. 4, which is a circuit diagram of the detection module. As shown in FIG. 4, the detection module 15 can be a simple two resistors R connected in series to Vcc, and the control module 16 is coupled between the two resistors R. In addition, the terminal A of the grounding impedance 14 is coupled to the resistor R and the second connecting end 112, respectively, and the terminal B of the grounding impedance 14 is coupled to the common ground GND2. For example, the resistance R can be a resistance of 100 k ohms, and the ground impedance 14 can be a resistance of approximately 0.5 ohms. If the voltage source Vcc provides a voltage of 5V, since the resistance R is much larger than the grounding impedance 14, when no forward or negative current flows, the control module 16 can detect half of the Vcc voltage, that is, a fixed 2.5V. Voltage.

When a current is input from the first connection terminal 111 and is output from the second connection terminal 112, the voltage of the terminal A of the ground impedance 14 should be slightly smaller than 0 V (the voltage of the common ground GND2), so that after the two resistors R are divided, The voltage detected by the control module 16 at 30 is less than a threshold of 2.5V, that is, the device 1 is in a state of charge. If the voltage value of 30 is gradually increased until it reaches the threshold of 2.5V, it indicates that the state of charge of the device 1 has been completed. Conversely, when a current is output from the first connection terminal 111 and input from the second connection terminal 112, the voltage of the terminal A of the ground impedance 14 should be slightly larger than 0 V (the voltage of the common ground GND2), so that the two resistances R are divided. After the voltage is applied, the voltage detected by the control module 16 at 30 is greater than the threshold of 2.5V, that is, the device 1 is in a discharged state. If the voltage value of 30 is gradually stepped down until the threshold value of 2.5V is lowered, it indicates that the discharge state of the device 1 has ended.

The switching circuits 19a, 19b are controlled by the control module 16 for changing the electrical connection between the plurality of batteries 3. When the smart power storage device 1 is in the charging state, the switching circuits 19a and 19b are controlled to electrically connect the negative electrodes of the battery 3 to the grounding end GND2 of the smart power storage device 1, and the positive electrodes are respectively connected to the charging circuit 12, so that each One battery 3 can be charged separately. In practice, the switching circuits 19a and 19b referred to in this embodiment can be implemented by relays. The present invention does not limit the types of switching circuits 19a and 19b. The switching circuits 19a and 19b can of course be power transistor switches or Other suitable switch structures.

Conversely, when the smart power storage device 1 is in the discharging state, the control module 16 controls the switching circuits 19a, 19b to connect the individual batteries 3 in series so that the plurality of batteries 3 can be connected in series to provide a larger one. Voltage.

When each of the batteries 3 is individually charged, the detecting unit 163 in the control module 16 is further operable to detect the battery voltage value of each of the batteries 3. For example, the control module 16 can preset a second threshold value (ie, a safety threshold value of the battery voltage value). When the battery voltage value of any of the batteries 3 exceeds the second threshold value, the control mode is controlled. The group 16 can correspond to the control charging circuit 12 for reducing or stopping the current output by the charging circuit 12 to all of the batteries 3.

On the other hand, if the battery voltage value of each of the batteries 3 does not exceed the second threshold value, the control module 16a controls the charging circuit 12 to output a large and fixed current to the battery 3. Of course, the present invention is not limited thereto. In the case of complying with the safety regulations, the user can set other different charging modes by himself to speed up the charging circuit 12 to charge the battery 3.

In summary, the embodiment of the invention provides an intelligent power storage device, wherein the power input end and the power output end of the intelligent power storage device are the same power transmission module. That is, the present invention can utilize a universal serial bus (USB) port as a connector for charging and discharging. In addition, the smart power storage device has a startup module to sense whether the smart power storage device has been engaged with the electronic device. Thereby, the intelligent power storage device can be used as an emergency charging device for most electronic devices currently on the market, and has the advantages of being light and thin, and convenient to carry.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

1, 1a. . . Intelligent power storage device

2. . . Electronic device

3. . . battery

11. . . Power transmission module

111. . . First connection

112. . . Second connection

12. . . Charging circuit

13. . . Discharge circuit

14. . . Ground impedance

15. . . Detection module

16. . . Control module

161. . . Power input

163. . . Detection unit

17, 17a, 17b, 17c, 17d, 17e, 17f. . . Startup module

170. . . Comparators

19a, 19b. . . Switching circuit

twenty one. . . Positive power terminal of the electronic device

twenty two. . . Ground terminal of electronic device

A. . . One end of the grounding impedance

B. . . The other end of the grounding impedance

GND1. . . Ground plane of electronic device

GND2. . . Ground terminal of intelligent power storage device

R, R1, R2, R3. . . resistance

C. . . capacitance

Vcc. . . power source

1 is a block diagram of an intelligent power storage device in accordance with an embodiment of the present invention.

2 is a circuit diagram of a boot module in accordance with an embodiment of the present invention.

3 is a circuit diagram of a boot module according to another embodiment of the present invention.

4 is a circuit diagram of a startup module according to still another embodiment of the present invention.

FIG. 5 is a circuit diagram of a startup module according to still another embodiment of the present invention.

6 is a circuit diagram of a start-up module according to still another embodiment of the present invention.

FIG. 7 is a circuit diagram of a startup module according to still another embodiment of the present invention.

FIG. 8 is a circuit diagram of a detection module according to an embodiment of the invention.

1. . . Intelligent power storage device

2. . . Electronic device

3. . . battery

11. . . Power transmission module

12. . . Charging circuit

13. . . Discharge circuit

14. . . Ground impedance

15. . . Detection module

16. . . Control module

twenty one. . . Positive power terminal of the electronic device

twenty two. . . Ground terminal of electronic device

111. . . First connection

112. . . Second connection

A. . . One end of the grounding impedance

B. . . The other end of the grounding impedance

GND1. . . Ground plane of electronic device

GND2. . . Ground terminal of intelligent power storage device

Claims (8)

An intelligent power storage device is coupled between an electronic device and at least one battery. The smart power storage device includes: a power transmission module having at least a first connection end and a second connection end, the a connection end is coupled to the positive power supply end of the electronic device, the second connection end is configured to be coupled to the ground end of the electronic device; a charging circuit is coupled between the power transmission module and the battery, and provides a first current path for receiving power from the electronic device for storage to the battery; a discharge circuit coupled between the power transmission module and the battery to provide a second current path for the battery The power is transmitted to the electronic device; a grounding impedance is coupled between the second connection end and the ground end of the intelligent power storage device; and a detection module coupled to the ground impedance for measuring the ground impedance One of the two ends detects the voltage value; and a control module is coupled to the charging circuit, the discharging circuit and the detecting module for determining the magnitude of the detected voltage value, thereby determining whether the charging is enabled Path, or decides whether to enable the discharge circuit. The intelligent power storage device of claim 1, further comprising: a starting module coupled to the power transmission module, the control module and the battery, respectively, for selectively controlling the control module A power input of the group is conductive to the first connection or the battery or a voltage source. The smart power storage device of claim 2, wherein the activation module comprises: a conductive elastic piece; and a field effect transistor, the source of the field effect transistor is coupled to the first connection end or The battery or the voltage source. The gate of the field effect transistor is coupled to the input end of the power supply, the gate of the field effect transistor is coupled to the conductive elastic piece, and the source of the field effect transistor is electrically connected to the field through a first resistor a gate of the utility transistor; wherein when the electronic device is held in the power transmission module, the conductive elastic piece is electrically connected to the ground end of the intelligent power storage device, so that the field effect transistor is turned on to form a positive edge Triggering, when the electronic device is not clamped to the power transmission module, the conductive dome is equal to the voltage of the drain of the field effect transistor, so that the field effect transistor is turned off. The intelligent power storage device of claim 3, wherein one end of the conductive elastic piece is coupled to the control module, and the other end is vacant, when the electronic device is clamped to the power transmission module, The conductive elastic piece is electrically connected to the ground end of the intelligent power storage device, so that the control module is switched from the vacant state to the grounded state through the conductive elastic piece, and becomes a negative edge trigger. The intelligent power storage device of claim 1, further comprising: a switching circuit coupled to the control module, the plurality of batteries, and a ground end of the intelligent power storage device, wherein the switching unit is controlled The control module is configured to electrically connect the batteries in series or electrically connect the batteries to the ground end of the smart power storage device. The intelligent power storage device of claim 5, wherein the switching circuit is further coupled to the charging circuit, and when the control module determines that the detected voltage value is less than the first threshold, the control module Controlling the switching circuit to electrically connect the batteries to the ground end of the smart power storage device, the control module enabling the charging circuit to receive power from the electronic device through the charging circuit, and charging the battery The power received by the circuit is separately stored to the batteries. The intelligent power storage device of claim 5, wherein the switching circuit is further coupled to the discharging circuit, and when the control module determines that the detected voltage value is greater than the first threshold, the control module The switching circuit is controlled to electrically connect the batteries in series, and the control module enables the discharging circuit to transmit power of the batteries to the electronic device. The intelligent power storage device of claim 1, wherein the control module further comprises: a detecting unit coupled to the two ends of the battery for detecting a battery voltage value of the battery; When the battery voltage value exceeds a second threshold, the control module controls the charging circuit to reduce charging current to one of the batteries.