Energy storage power supply

Abstract

The utility model relates to the technical field of energy storage power supplies, and discloses an energy storage power supply which comprises a key group, a display screen, a control panel, a key detection circuit and a screen driving circuit. The key group comprises at least two keys. The key detection circuit is connected with the at least two keys and the control panel, and the key detection circuit is used for detecting whether the keys are pressed or not. The screen driving circuit is connected with the display screen and the control panel; wherein the control panel is used for receiving trigger signals of at least two keys through the key detection circuit and controlling the energy storage power supply to open or close the child lock function according to the current state according to the trigger signals, and the display screen is used for displaying prompt information triggered by the keys. In this way, the risk that the child lock function of the energy storage power supply is unlocked by mistake can be reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage power technology, and in particular to an energy storage power source. Background Technology

[0002] Portable energy storage power supplies are miniaturized, lightweight energy storage systems designed for mobile or temporary power supply. They are widely used in various scenarios, including but not limited to: outdoor activities, emergency rescue, mobile offices, home backup power, and medical applications. Portable energy storage power supplies output AC / DC voltage during operation, which poses certain safety risks.

[0003] Current portable energy storage power supplies use a sliding switch to unlock the child lock function, which can only be unlocked by moving the slider to a specific position. However, the sliding switch unlocking method is relatively simple, and the risk of the child lock function being accidentally unlocked is relatively high. Utility Model Content

[0004] In view of the problems existing in the background art, the purpose of this application is to provide an energy storage power source that overcomes or at least partially solves the above problems.

[0005] According to a first aspect of this application, an energy storage power supply is provided, including a button group, a display screen, a control board, a button detection circuit, and a screen driving circuit. The display screen includes at least two buttons. The button detection circuit is connected to the at least two buttons and the control board, and is used to detect whether a button is pressed. The screen driving circuit is connected to the display screen and the control board; wherein, the control board is used to receive trigger signals from the at least two buttons through the button detection circuit, and control the energy storage power supply to enable or disable a child lock function according to the current state based on the trigger signals; the display screen is used to display prompt information indicating that the buttons have been triggered.

[0006] In one or more of the above optional embodiments, a communication module is included, which is connected to the control board and is used for communication connection with a mobile terminal.

[0007] In one or more of the above optional embodiments, the button detection circuit includes a first switch circuit and a signal output line, which are arranged in a one-to-one correspondence with the at least two buttons. A first terminal of each first switch circuit is connected to a power supply. One end of each signal output line is connected to the first terminal of the first switch circuit, and the other end of the signal output line is connected to the control board. A second terminal of each first switch circuit is grounded. One end of each button is connected to the third terminal of a first switch circuit, and the other end of each button is connected to the power supply. When a button is pressed, the third terminal of the corresponding first switch circuit is connected to the power supply, thus connecting the first and second terminals of the corresponding first switch circuit. This causes the high-level signal output by the signal output line to the control board to change to a low-level signal.

[0008] In one or more of the above optional embodiments, the key detection circuit further includes at least two current limiting circuits, one end of the current limiting circuit is connected to the first end of the first switching circuit, the other end of the current limiting circuit is used to connect to the power supply, and one end of the signal output line is connected between the current limiting circuit and the first end of the first switching circuit.

[0009] In one or more of the above optional embodiments, the first switching circuit includes a first selector switch, a second resistor, a third resistor, and a first capacitor. The first conducting terminal of the first selector switch is connected to the power supply, the second conducting terminal of the first selector switch is grounded, and the control terminal of the first selector switch is connected to one end of the corresponding button through the second resistor. One end of the third resistor is connected between the control terminal of the first selector switch and the second resistor, and the other end of the third resistor is grounded. The button detection circuit further includes a second capacitor, one end of which is disposed between the control terminal of the first selector switch and the second resistor, and the other end of the second capacitor is grounded.

[0010] In one or more of the above optional embodiments, the display screen is equipped with a backlight. The screen driving circuit includes a data transmission circuit and a backlight control circuit, the backlight control circuit being connected to the backlight, and the data transmission circuit being connected to the display screen.

[0011] In one or more of the above optional embodiments, the data transmission circuit includes a serial clock line, a fourth resistor, and a fifth resistor. A first end of the serial clock line is connected to the control board, and a second end of the serial clock line is connected to the display screen. The fourth resistor is disposed between the first end and the second end of the serial clock line. One end of the fifth resistor is connected to a power supply, and the other end of the fifth resistor is connected between the fourth resistor and the second end of the serial clock line. The data transmission circuit also includes a serial data line, a sixth resistor, and a seventh resistor. A first end of the serial data line is connected to the control board, and a second end of the serial data line is connected to the display screen. The sixth resistor is disposed between the first end and the second end of the serial data line. One end of the seventh resistor is connected to a power supply, and the other end of the seventh resistor is connected between the sixth resistor and the second end of the serial data line.

[0012] In one or more of the above optional embodiments, the data transmission circuit includes a third capacitor and a fourth capacitor. One end of the third capacitor is connected between the connection point of the fourth resistor and the fifth resistor and the serial clock line, and the other end of the third capacitor is grounded. One end of the fourth capacitor is connected between the connection point of the sixth resistor and the seventh resistor and the serial data line, and the other end of the fourth capacitor is grounded.

[0013] In one or more of the above optional embodiments, the backlight control circuit includes a second switching circuit. One end of the backlight is connected to the power supply, the other end of the backlight is connected to a first terminal of the second switching circuit, a second terminal of the second switching circuit is grounded, and a third terminal of the second switching circuit is connected to the control board. The second switching circuit is used to control the connection between the first and second terminals of the second switching circuit when it receives a high-level signal from the control board at its third terminal.

[0014] In one or more of the above optional embodiments, the second switching circuit includes a second selector switch, an eighth resistor, a ninth resistor, and a fifth capacitor. The first conducting terminal of the second selector switch is connected to the other end of the backlight, the second conducting terminal of the second selector switch is grounded, and the control terminal of the second selector switch is connected to the control board through the eighth resistor. One end of the ninth resistor is located between the eighth resistor and the control terminal of the second selector switch, and the other end of the ninth resistor is grounded. One end of the fifth capacitor is located between the eighth resistor and the control terminal of the second selector switch, and the other end of the fifth capacitor is grounded.

[0015] The beneficial effects of the embodiments of this application are as follows: The energy storage power supply provided in the embodiments of this application, by setting at least two buttons, allows the control board to receive the trigger signals of at least two buttons through the button detection circuit and execute corresponding operations. The combination of at least two buttons can realize a more complex unlocking method. The control board drives the display screen through the screen driving circuit to display the prompt information of the button trigger, so that the user can understand the status of the device. Compared with traditional sliding switches or protective covers, the energy storage power supply provided in the embodiments of this application is conducive to increasing the unlocking difficulty of the child lock function, thereby reducing the risk of the child lock function being mistakenly locked. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 A structural block diagram of an energy storage power source provided in an embodiment of this application;

[0018] Figure 2 A partial schematic diagram of an energy storage power source provided in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of a button detection circuit for an energy storage power supply provided in an embodiment of this application.

[0020] Figure 4 for Figure 3 A schematic diagram of a key detection circuit is provided in the figure;

[0021] Figure 5 A schematic diagram of the backlight control circuit of an energy storage power supply provided in an embodiment of this application;

[0022] Figure 6 A schematic diagram of the data transmission circuit of an energy storage power supply provided in an embodiment of this application;

[0023] Figure 7 for Figure 5 The diagram below provides a schematic of the circuit structure of a backlight control circuit. Detailed Implementation

[0024] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly connected to the other element, or there may be one or more intervening elements. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0026] Please see Figure 1 The energy storage power supply 1000 includes a button group 1, a display screen 2, a control board 3, a button detection circuit 4, and a screen driving circuit 5. The button group 1 includes at least two buttons. The button detection circuit 4 is connected to the at least two buttons and the control board 3, and is used to detect whether a button is pressed. The screen driving circuit 5 is connected to the display screen 2 and the control board 3. The control board 3 receives trigger signals from the at least two buttons through the button detection circuit 4, and controls the energy storage power supply 1000 to enable or disable the child lock function according to the current state based on the trigger signals. The display screen 2 displays prompt information indicating button triggering.

[0027] The energy storage power supply 1000 provided in this application embodiment has at least two buttons. The control board 3 receives the trigger signals of at least two buttons through the button detection circuit 4 and performs corresponding operations. The combination of at least two buttons can realize a more complex unlocking method. The control board 3 drives the display screen 2 through the screen driving circuit 5 to display the prompt information of the button trigger, so that the user can understand the status of the device. Compared with traditional sliding switches or protective covers, the energy storage power supply 1000 provided in this application embodiment is conducive to increasing the unlocking difficulty of the child lock function, thereby reducing the risk of the child lock function being mistakenly locked.

[0028] Please see Figure 2In some embodiments, button group 1 includes a DC output button 11 and an AC output button 12. In the initial state, display screen 2 shows the initial interface. Simultaneously pressing and holding both the DC output button 11 and the AC output button 12 switches the energy storage power supply 1000 from the initial state to the function setting state, and display screen 2 switches to displaying the function setting interface. In the function setting state, a short press of the DC output button 11 selects a function type for the energy storage power supply 1000, including a child lock function. Display screen 2 displays the icon corresponding to the function type. Continuing to short press the DC output button switches the selected function type, and display screen 2 switches to displaying the icon corresponding to the currently selected function type. When a function type is selected, a short press of the AC output button 12 enables or disables the currently selected function type according to the current state. The method for enabling or disabling the child lock function is as follows:

[0029] Step 1: In the initial state, press and hold the DC output button 11 and the AC output button 12 simultaneously to switch the energy storage power supply 1000 from the initial state to the function setting state.

[0030] Step 2: In the function setting state, repeatedly press the DC output button 11 individually until the child lock function is selected in the energy storage power supply 1000.

[0031] Step 3: Briefly press the AC output button 12. The energy storage power supply 1000 will turn the child lock function on or off according to the current status. Specifically, when the child lock function is currently on, the energy storage device will turn off the child lock function, and when the child lock function is currently off, the energy storage device will turn on the child lock function.

[0032] It is understood that the number of buttons in button group 1 can be set according to the actual situation. The same button can be reused in different steps, or new buttons can be added. For example, in some embodiments, the energy storage device also includes a power button 13. The power button 13 replaces the DC output button 11 to select the function type in the function setting state, or the power button 13 replaces the AC output button 12 to control the energy storage power supply 1000 to turn the function type on or off. Alternatively, in some embodiments, in addition to the DC output button 11 and the AC output button 12, the energy storage power supply 1000 is also provided with two additional buttons. These two buttons are used to replace the function of the DC output button 11 and the AC output button 12, respectively, in the function setting state.

[0033] It is also understandable that the methods for enabling or disabling the child lock function are not limited to the methods mentioned above. The operation method of the buttons when enabling or disabling the child lock function can be set according to actual needs.

[0034] Please see Figure 1In some embodiments, the energy storage power supply 1000 includes a communication module 6, which is connected to the control board 3 and is used to communicate with a mobile terminal.

[0035] In some embodiments, the communication module 6 is a dual-mode communication module for both Wi-Fi and Bluetooth, and the mobile terminal can connect via the communication module 6 using either Wi-Fi or Bluetooth.

[0036] In some embodiments, the control board 3 sends status information to the mobile terminal via the communication module 6 for display by the mobile terminal.

[0037] In some embodiments, the control board 3 receives control signals from the mobile terminal through the communication module 6, and turns the child lock function on or off according to the control signals from the mobile terminal.

[0038] Please see Figure 1 and Figure 2 In some embodiments, the energy storage power supply 1000 includes a housing 8, a control board 3, a key detection circuit 4, a screen driving circuit 5 and a communication module 6 disposed inside the housing 8, and at least two keys and a display screen 2 disposed on the outer wall of the housing 8.

[0039] In some embodiments, the key detection circuit 4, the screen driving circuit 5, and the communication module 6 are integrated on the substrate of the control board 3.

[0040] Please see Figure 1 , Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of a button detection circuit 4 with at least two buttons, namely a DC output button 11 and an AC output button 12. In some embodiments, the button detection circuit 4 includes a first switch circuit 41 and a signal output line 42, which are arranged in a one-to-one correspondence with the at least two buttons. The first terminal 41A of each first switch circuit 41 is connected to the power supply P. One end of the signal output line 42 is connected to the first terminal 41A of the first switch circuit 41, and the other end of the signal output line 42 is connected to the control board 3. The second terminal 41B of each first switch circuit 41 is grounded. One end of each button is connected to the third terminal 41C of a first switch circuit 41, and the other end of the button is connected to the power supply P. When a button is pressed, the third terminal 41C of the corresponding first switch circuit 41 is turned on to the power supply P, which in turn turns on the first terminal 41A and the second terminal 41B of the corresponding first switch circuit 41, thereby changing the high-level signal output by the signal output line 42 to the control board 3 into a low-level signal. The control board 3 determines whether the button corresponding to the signal output line 42 has been pressed by receiving the level signal through the signal output line 42.

[0041] In some embodiments, the key detection circuit 4 further includes at least two current limiting circuits 43. One end of one current limiting circuit 43 is connected to the first terminal 41A of a first switching circuit 41, and the other end of the current limiting circuit 43 is used to connect to the power supply P. One end of the signal output line 42 is connected between the current limiting circuit 43 and the first terminal 41A of the first switching circuit 41.

[0042] In some embodiments, the current limiting circuit 43 includes a first resistor R1.

[0043] In some embodiments, the first switching circuit 41 includes a first selector switch Q1, a second resistor R2, a third resistor R3, and a first capacitor C1. The first conducting terminal of the first selector switch Q1 is connected to a power supply P, the second conducting terminal of the first selector switch Q1 is grounded, and the control terminal of the first selector switch Q1 is connected to one end of a corresponding button via the second resistor R2. The second resistor R2 is used to limit the current flowing through the power supply P to the control terminal of the first selector switch Q1 when the button is on. One end of the third resistor R3 is connected between the control terminal of the first selector switch Q1 and the second resistor R2, and the other end of the third resistor R3 is grounded. The third resistor R3 is a bias resistor, used to ensure that the control terminal of the first selector switch Q1 has a preset voltage that meets the requirements. One end of the first capacitor C1 is located between the control terminal of the first selector switch Q1 and the second resistor R2, and the other end of the first capacitor C1 is grounded. The first capacitor C1 is used to distribute part of the voltage of the equivalent parasitic capacitance between the first conducting terminal and the second conducting terminal of the first selector switch Q1 when there is high-frequency interference, so that it cannot reach the turn-on voltage of the first conducting terminal and the second conducting terminal of the first selector switch Q1.

[0044] When the button is not pressed, there is no electrical conductivity at the button, the control terminal of the first selector switch Q1 corresponding to the button is at a low level, there is no electrical continuity between the first conducting terminal and the second conducting terminal of the first selector switch Q1, the first conducting terminal of the first selector switch Q1 is at a high level, and the signal output line 42 sends a high-level signal to the detection terminal of the control board 3. When the button corresponding to the first switch circuit 41 is pressed, there is electrical conductivity at the button, the control terminal of the first selector switch Q1 is at a high level, the first conducting terminal and the second conducting terminal of the first selector switch Q1 are connected to ground, the first conducting terminal of the first selector switch Q1 is at a low level, and the signal output line 42 sends a low-level signal to the detection terminal of the control board 3.

[0045] In some embodiments, the first selection switch Q1 may include, but is not limited to, a transistor or a MOSFET.

[0046] Taking the first selection switch Q1 as a transistor as an example, the first conducting terminal of the first selection switch Q1 is the collector, the second conducting terminal of the first selection switch Q1 is the emitter, and the control terminal of the first selection switch Q1 is the base.

[0047] Taking the first selection switch Q1 as a MOSFET as an example, the first conducting terminal of the first selection switch Q1 is the source, the second conducting terminal of the first selection switch Q1 is the drain, and the control terminal of the first selection switch Q1 is the gate.

[0048] In some embodiments, the key detection circuit 4 further includes a second capacitor C2, one end of which is connected to the power supply P, and the other end of which is grounded. The second capacitor C2 is a voltage regulator capacitor.

[0049] Please see Figure 1 , Figure 5 and Figure 6 In some embodiments, the display screen 2 is provided with a backlight 21. The screen driving circuit 5 includes a data transmission circuit 51 and a backlight control circuit 52, the backlight control circuit 52 being connected to the backlight 21 and the data transmission circuit 51 being connected to the display screen 2.

[0050] In some embodiments, the data transmission circuit 51 includes a serial clock line LCD_SCL, a fourth resistor R4, and a fifth resistor R5. A first end of the serial clock line LCD_SCL is connected to the control board 3, and a second end of the serial clock line LCD_SCL is connected to the display screen 2. The fourth resistor R4 is located between the first and second ends of the serial clock line LCD_SCL. One end of the fifth resistor R5 is connected to the power supply P, and the other end of the fifth resistor R5 is connected between the fourth resistor R4 and the second end of the serial clock line LCD_SCL. The fourth resistor R4 is a current-limiting resistor, and the fifth resistor R5 is a pull-up resistor.

[0051] In some embodiments, the data transmission circuit 51 further includes a serial data line LCD_SDA, a sixth resistor R6, and a seventh resistor R7. The first end of the serial data line LCD_SDA is connected to the control board 3, and the second end of the serial data line LCD_SDA is connected to the display screen 2. The sixth resistor R6 is located between the first end and the second end of the serial data line LCD_SDA. One end of the seventh resistor R7 is connected to the power supply P, and the other end of the seventh resistor R7 is connected between the sixth resistor R6 and the second end of the serial data line LCD_SDA. The sixth resistor R6 is a current-limiting resistor, and the seventh resistor R7 is a pull-up resistor.

[0052] In some embodiments, the energy storage power supply 1000 includes a first plug CN1, the second end of the serial clock line LCD_SCL and the second end of the serial data line LCD_SDA are connected to the first plug CN1, and the display screen 2 is provided with a first socket, into which the first plug CN1 is plugged.

[0053] In some embodiments, the data transmission circuit 51 includes a third capacitor C3 and a fourth capacitor C4. One end of the third capacitor C3 is connected between the connection point of the fifth resistor R5 and the serial clock line LCD_SCL and the fourth resistor R4, and the other end of the third capacitor C3 is grounded. One end of the fourth capacitor C4 is connected between the connection point of the seventh resistor R7 and the serial data line LCD_SDA and the sixth resistor R6, and the other end of the fourth capacitor C4 is grounded. The third capacitor C3 and the fourth capacitor C4 are used for filtering.

[0054] Please see Figure 1 , Figure 5 and Figure 7 In some embodiments, the backlight control circuit 52 includes a second switch circuit 521. A first terminal of the backlight 21 is connected to a power supply P, a second terminal of the backlight 21 is connected to a first terminal 521A of the second switch circuit 521, a second terminal 521B of the second switch selection circuit is grounded, and a third terminal 521C of the second selection switch is connected to the control board 3. The second switch circuit 521 is used to control the connection between the first terminal 521A and the second terminal 521B of the second switch circuit 521 when the third terminal 521C receives a high-level signal from the control board 3.

[0055] In some embodiments, the second switching circuit 521 includes a second selector switch Q2, an eighth resistor R8, a ninth resistor R9, and a fifth capacitor C5. The first conducting terminal of the second selector switch Q2 is connected to the second terminal of the backlight 21, and the second conducting terminal of the second selector switch Q2 is grounded. The control terminal of the second selector switch Q2 is connected to the control board 3 via the eighth resistor R8, which limits the current flowing from the control board 3 to the second selector switch Q2. One end of the ninth resistor R9 is located between the eighth resistor R8 and the control terminal of the second selector switch Q2, and the other end of the ninth resistor R9 is grounded. The ninth resistor R9 is a bias resistor, used to ensure that the control terminal of the second selector switch Q2 has a preset voltage that meets the requirements. One end of the fifth capacitor C5 is located between the eighth resistor R8 and the control terminal of the second selector switch Q2, and the other end of the fifth capacitor C5 is grounded. The second capacitor is used to distribute part of the voltage of the equivalent parasitic capacitance between the first conducting terminal and the second conducting terminal of the second selector switch Q2 when there is high-frequency interference, so that it cannot reach the turn-on voltage of the first conducting terminal and the second conducting terminal of the second selector switch Q2.

[0056] When the backlight control signal output by the control board 3 is high, the first and second conducting terminals of the second selection switch Q2 are connected, the power supply P supplies power to the display screen 2, and the display screen 2 turns on to display the backlight; when the backlight control signal output by the control board 3 is low, the first and second conducting terminals of the second selection switch Q2 are turned off, the power supply P stops supplying power to the display screen 2, and the display screen 2 turns off.

[0057] In some embodiments, the second selection switch Q2 may include, but is not limited to, a transistor or a MOSFET.

[0058] In some embodiments, the energy storage power supply 1000 includes a second plug CN2, which includes a first interface and a second interface. The first end of the first interface is connected to the first conducting end of the second selection switch Q2, and the first end of the second interface is electrically connected to the power supply P. The second plug CN2 is plugged into the display screen 2, and the second end of the first interface is connected to the first end of the backlight 21. The second end of the second interface is connected to the second end of the backlight 21.

[0059] Finally, it should be noted that this utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, within the framework of this utility model, the above-mentioned technical features can be combined with each other, and many other variations of different aspects of this utility model as described above exist, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An energy storage power source, characterized in that, include: A button group, comprising at least two buttons; Display screen; Control panel; A button detection circuit is connected to the at least two buttons and the control board, and the button detection circuit is used to detect whether the button is pressed. A screen driving circuit is connected to the display screen and the control board; The control board is used to receive trigger signals from the at least two buttons through the button detection circuit, and control the energy storage power supply to turn the child lock function on or off according to the current state based on the trigger signals. The display screen is used to display prompt information for the button trigger.

2. The energy storage power supply according to claim 1, characterized in that, The energy storage power supply also It includes a communication module, which is connected to the control board and is used to communicate with a mobile terminal.

3. The energy storage power supply according to claim 2, characterized in that, The button detection circuit includes a first switch circuit and a signal output line, which are arranged in a one-to-one correspondence with the number of the at least two buttons. The first end of each first switch circuit is used to connect to the power supply. One end of each signal output line is connected to the first end of the first switch circuit, and the other end of the signal output line is connected to the control board. The second end of each first switch circuit is grounded. One end of each button is connected to the third end of each first switch circuit, and the other end of each button is used to connect to the power supply. When the button is pressed, it connects the third terminal of the corresponding first switch circuit to the power supply, thereby connecting the first terminal and the second terminal of the corresponding first switch circuit, and thus changing the high-level signal output by the signal output line to the control board into a low-level signal.

4. The energy storage power supply according to claim 3, characterized in that, The button detection circuit further includes at least two current limiting circuits. One end of the current limiting circuit is connected to the first end of the first switching circuit, and the other end of the current limiting circuit is used to connect to the power supply. One end of the signal output line is connected between the current limiting circuit and the first end of the first switching circuit.

5. The energy storage power supply according to claim 3, characterized in that, The first switching circuit includes a first selection switch, a second resistor, a third resistor, and a first capacitor; The first conducting terminal of the first selection switch is used to connect to the power supply, the second conducting terminal of the first selection switch is grounded, and the control terminal of the first selection switch is connected to one end of the corresponding button through the second resistor. One end of the third resistor is connected between the control terminal of the first selector switch and the second resistor, and the other end of the third resistor is grounded. The button detection circuit further includes a second capacitor, one end of which is disposed between the control terminal of the first selector switch and the second resistor, and the other end of which is grounded.

6. The energy storage power supply according to claim 1, characterized in that, The display screen is equipped with a backlight; The screen driving circuit includes a data transmission circuit and a backlight control circuit. The backlight control circuit is connected to the backlight lamp, and the data transmission circuit is connected to the display screen.

7. The energy storage power supply according to claim 6, characterized in that, The data transmission circuit includes a serial clock line, a fourth resistor, and a fifth resistor. The first end of the serial clock line is connected to the control board, and the second end of the serial clock line is connected to the display screen. The fourth resistor is located between the first end and the second end of the serial clock line. One end of the fifth resistor is used to connect to the power supply, and the other end of the fifth resistor is connected between the fourth resistor and the second end of the serial clock line. The data transmission circuit further includes a serial data line, a sixth resistor, and a seventh resistor. The first end of the serial data line is connected to the control board, and the second end of the serial data line is connected to the display screen. The sixth resistor is located between the first end and the second end of the serial data line. One end of the seventh resistor is used to connect to the power supply, and the other end of the seventh resistor is connected between the sixth resistor and the second end of the serial data line.

8. The energy storage power supply according to claim 7, characterized in that, The data transmission circuit includes a third capacitor and a fourth capacitor. One end of the third capacitor is connected between the fourth resistor and the fifth resistor and the serial clock line, and the other end of the third capacitor is grounded. One end of the fourth capacitor is connected between the sixth resistor and the seventh resistor and the serial data line, and the other end of the fourth capacitor is grounded.

9. The energy storage power supply according to claim 6, characterized in that, The backlight control circuit includes a second switching circuit. One end of the backlight is connected to the power supply, the other end of the backlight is connected to the first end of the second switching circuit, the second end of the second switching circuit is grounded, and the third end of the second switching circuit is connected to the control board. The second switching circuit is used to control the conduction between the first terminal and the second terminal of the second switching circuit when the third terminal of the second switching circuit receives a high-level signal from the control board.

10. The energy storage power supply according to claim 9, characterized in that, The second switching circuit includes a second selection switch, an eighth resistor, a ninth resistor, and a fifth capacitor; The first conducting terminal of the second selector switch is connected to the other end of the backlight, the second conducting terminal of the second selector switch is grounded, and the control terminal of the second selector switch is connected to the control board through the eighth resistor. One end of the ninth resistor is located between the eighth resistor and the control terminal of the second selector switch, and the other end of the ninth resistor is grounded. One end of the fifth capacitor is located between the eighth resistor and the control terminal of the second selector switch, and the other end of the fifth capacitor is grounded.

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