A relay drive circuit and energy storage power supply

Abstract

The present invention relates to the field of energy storage power supplies, and mainly provides a relay drive circuit and an energy storage power supply. The circuit includes a switch module, a drive module connected to the switch module, and a voltage regulation module. The switch module is also connected to a power supply and a coil of a relay. After receiving a drive signal, the drive module drives the switch module into a saturated state, so that the power supply provides a starting voltage to the coil of the relay through the switch module, thereby activating the relay. When the relay is activated, the drive module controls the switch module to be in an amplified state after a preset working time, so that the voltage regulation module adjusts the voltage received by the coil of the relay to control the relay to continue to work based on the preset voltage, thereby avoiding the occurrence of overheating of the relay due to continuous operation at a high voltage. Moreover, by providing the starting voltage and the preset voltage to the relay through the same power supply, the use of dual power rails and their redundant control timing is avoided, thereby reducing the cost of the energy storage power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage power supplies, and in particular to a relay drive circuit and an energy storage power supply. Background Art

[0002] In energy storage power supplies with high protection levels (such as IP54, IP65, etc.), due to the sealing of the internal cavity, the internal ambient temperature is usually high during operation, which can easily cause the relay coil to overheat. There are two common solutions:

[0003] One approach is to reduce the relay coil's on-time. PWM control is often used to reduce this, but this method requires significant timer and MCU resources and can also introduce noticeable audible noise, so it's rarely used in practice.

[0004] The second approach is to reduce the relay coil's power supply voltage. Relays are typically driven using dual voltages (a starting voltage and a holding voltage). The starting voltage is typically greater than or equal to the rated voltage of the relay coil, while the holding voltage is typically 50% to 70% of the rated voltage. After the relay is started, the holding voltage provides power to the relay coil, reducing power consumption. However, this dual voltage solution requires two power rails, two control I / Os, and associated control timing, increasing software control complexity and product cost. Summary of the Invention

[0005] The embodiments of the present invention provide a relay drive circuit and an energy storage power supply, aiming to solve the technical problem of high cost when the energy storage power supply controls the operation of the relay in the prior art.

[0006] In order to solve the above technical problems, a technical solution adopted in an embodiment of the present invention is as follows: providing a relay driving circuit, the relay driving circuit comprising a switch module, a voltage regulating module and a driving module;

[0007] The driving module is connected to the switch module, and the switch module is respectively connected to the power supply, the coil of the relay and the voltage regulating module;

[0008] The driving module is configured to start working after receiving a driving signal to drive the switch module into a saturated state, so that the power supply supplies power to the coil of the relay through the switch module to provide a starting voltage for the coil of the relay; and

[0009] After working for a preset time, controlling the switch module to be in an amplified state;

[0010] The voltage regulating module is used to adjust the voltage received by the coil of the relay to a preset voltage when the switch module is in the amplified state, wherein the starting voltage is greater than the preset voltage.

[0011] Optionally, the driving module includes a driving unit and a circulation unit;

[0012] The circulation unit is connected to the driving unit and the switch module respectively, the driving unit is also connected to the power supply, and the driving unit is further used to receive a driving signal;

[0013] The driving unit is configured to input the power supply voltage of the power supply to the circulation unit according to the driving signal after receiving the driving signal;

[0014] The flow unit is configured to have a flow capacity greater than or equal to a preset value when receiving the power supply voltage within a preset time, so as to control the switch module to enter a saturation state, thereby providing a starting voltage for the coil of the relay; and

[0015] When the flow capacity of the power supply voltage is less than the preset value after a preset time, the switch module is controlled to enter an amplification state, so that the voltage regulating module adjusts the voltage received by the coil of the relay to a preset voltage.

[0016] Optionally, the driving unit is a switch tube Q3;

[0017] The control end of the switch tube Q3 is used to receive a driving signal, a first end of the switch tube Q3 is connected to the circulation unit, and a second end of the switch tube Q3 is connected to the power supply.

[0018] Optionally, the flow unit includes a capacitor C1, a resistor R1 and a resistor R2;

[0019] The resistor R2 is connected to the driving unit through the resistor R1 . The resistor R2 is also connected to the switch module. The capacitor C1 is connected in parallel with the resistor R1 .

[0020] Optionally, the switch module includes a switch tube Q1 and a resistor R3;

[0021] The control end of the switch tube Q1 is connected to the circulation unit, and the control end of the switch tube Q1 is also grounded through the resistor R3. The first end of the switch tube Q1 is connected to the power supply, and the second end of the switch tube Q1 is respectively connected to the coil end of the relay and the voltage regulation module.

[0022] Optionally, the resistor R1 is configured to stop working within a preset time after receiving the power voltage of the power supply, so that the voltage received by the control terminal of the switch tube Q1 is greater than or equal to the first voltage, thereby causing the switch tube Q1 to enter a saturation state; and

[0023] After receiving the power supply voltage for a preset time, the voltage is divided with the resistor R2 so that the voltage received by the control end of the switch tube Q1 is less than the first voltage and greater than the second voltage, thereby causing the switch tube Q1 to enter an amplification state, wherein the first voltage is greater than the second voltage.

[0024] Optionally, the voltage regulation module includes a comparison unit and a voltage dividing unit;

[0025] The comparison unit is connected to the switch module, the voltage dividing unit and the coil of the relay respectively, and the comparison unit is further used to receive a preset voltage;

[0026] The comparison unit is used to receive the voltage output by the switch module, and when the voltage output by the switch module is greater than the preset voltage, control the voltage dividing unit to start working so as to reduce the voltage received by the coil of the relay; and

[0027] When the voltage output by the switch module is less than the preset voltage, the voltage dividing unit is controlled to stop working, so that the coil of the relay receives the voltage output by the switch module.

[0028] Optionally, the comparison unit is a comparator U1B;

[0029] The non-inverting input terminal of the comparator U1B is connected to the switch module, the inverting input terminal of the comparator U1B is used to receive a preset voltage, and the output terminal of the comparator U1B is connected to the voltage dividing unit.

[0030] Optionally, the voltage dividing unit includes a switch tube Q2 and a resistor R4;

[0031] The control end of the switch tube Q2 is connected to the output end of the comparator U1B, the first end of the switch tube Q2 is connected to the switch module through the resistor R4, and the second end of the switch tube Q2 is grounded.

[0032] In order to solve the above technical problems, another technical solution adopted in the embodiment of the present invention is to provide an energy storage power supply, the energy storage power supply comprising:

[0033] Power supply;

[0034] relays;

[0035] Controller; and

[0036] Relay drive circuit as described above.

[0037] Differentiating from related art, the present invention provides a relay drive circuit and energy storage power supply. The circuit comprises a switch module, a voltage regulator module, and a driver module. The driver module is connected to the switch module, which is in turn connected to a power supply, a relay coil, and the voltage regulator module. Upon receiving a drive signal, the driver module drives the switch module into a saturated state, allowing the power supply to provide a starting voltage to the relay coil via the switch module, thereby activating the relay. After the relay is activated, the driver module controls the switch module to an amplified state after a preset operating time, allowing the voltage regulator module to adjust the voltage received by the relay coil in real time and control the relay to operate continuously based on the preset voltage, thereby preventing overheating caused by continuous operation at high voltages. Furthermore, by providing both the starting voltage and the preset voltage to the relay from a single power supply, the cost of the energy storage power supply is reduced by eliminating the need for dual power rails and their associated redundant control sequences. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0039] Figure 1 This is a structural block diagram of an energy storage power supply provided by an embodiment of the present invention;

[0040] Figure 2 This is a structural block diagram of a relay drive circuit provided by an embodiment of the present invention;

[0041] Figure 3 This is a circuit diagram of a relay drive circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] It should be noted that, unless there is a conflict, the various features of the embodiments of the present invention may be combined with each other and are all within the scope of protection of the present invention. In addition, although the functional modules are divided in the device schematics and the logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than the module division in the device schematics or the order in the flowcharts.

[0044] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are intended solely for the purpose of describing specific embodiments and are not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0045] See also Figure 1 , Figure 1 This is a structural block diagram of the energy storage power supply provided by an embodiment of the present invention, such as Figure 1 As shown, the energy storage power supply 100 includes a relay RLY1, a controller 10, a relay drive circuit 20, and a power supply 30. Relay RLY1 is connected to the relay drive circuit 20, which is further connected to the controller 10 and the power supply 30. The relay drive circuit 20 is configured to receive a drive signal output by the controller 10, begin operation based on the drive signal, and input the power supply voltage of the power supply 30 to the coil end of the relay RLY1 within a preset operation time, thereby activating the relay RLY1 and closing it. After the relay drive circuit 20 has operated for the preset time, the relay drive circuit 20 adjusts the power supply voltage of the power supply 30 and inputs the adjusted power supply voltage to the coil end of the relay RLY1, thereby keeping the relay RLY1 in a continuously closed state based on the adjusted voltage, wherein the adjusted voltage is less than the power supply voltage. It should be noted that the relay drive circuit 20 times the working time through hardware, thereby providing a larger activation voltage to the relay RLY1 based on the power supply 30 within the preset working time, and then continuously outputting a smaller maintenance voltage to the relay RLY1 after the preset time, thereby avoiding the relay RLY1 from continuously working at a high voltage, thereby reducing the loss of the relay RLY1 and improving the reliability of the energy storage power supply 100.

[0046] In some embodiments, see Figure 2 , Figure 2 This is a structural block diagram of a relay drive circuit provided by an embodiment of the present invention. Figure 2 As shown, the relay driving circuit 20 includes a switch module 21, a voltage regulating module 22 and a driving module 23;

[0047] The driving module 23 is connected to the switch module 21, and the switch module 21 is respectively connected to the power supply 30, the coil of the relay RLY1 and the voltage regulating module 22;

[0048] The driving module 23 is configured to start working after receiving a driving signal to drive the switch module 21 to enter a saturated state, so that the power supply supplies power to the coil of the relay RLY1 through the switch module 21 to provide a starting voltage for the coil of the relay RLY1; and

[0049] After working for a preset time, the switch module 21 is controlled to be in an amplified state;

[0050] The voltage regulating module 22 is configured to adjust the voltage received by the coil of the relay RLY1 to a preset voltage when the switch module 21 is in the amplified state, wherein the starting voltage is greater than the preset voltage.

[0051] Specifically, when the energy storage power supply 100 begins operating, the controller 10 outputs a drive signal to the drive module 23. Upon receiving the drive signal, the drive module 23 begins operating based on the drive signal. During the predetermined operating time of the drive module 23, the drive module 23 controls the switch module 21 to operate in a saturated state, thereby directly inputting the power supply voltage of the power supply 30 through the switch module 21 to the coil of the relay RLY1, thereby providing a starting voltage for the relay RLY1 and closing the relay RLY1. After the predetermined operating time of the drive module 23, the drive module 23 controls the switch module 21 to operate in an amplified state. At this point, the voltage regulator module 22 obtains the power supply voltage through the switch module 21 and adjusts it so that the voltage received by the coil of the relay RLY1 is a predetermined voltage. This allows the relay RLY1 to maintain an operating state at a lower voltage, thereby reducing losses in the relay RLY1.

[0052] In yet another embodiment, Figure 2 As shown, the driving module 23 includes a driving unit 231 and a circulation unit 232;

[0053] The circulation unit 232 is connected to the driving unit 231 and the switch module 21 respectively. The driving unit 231 is also connected to the power supply 30. The driving unit 231 is also used to receive a driving signal.

[0054] The driving unit 231 is configured to input the power supply voltage of the power supply 30 to the circulation unit 232 according to the driving signal after receiving the driving signal;

[0055] The flow unit 232 is configured to have a flow capacity greater than or equal to a preset value when receiving the power voltage within a preset time, so as to control the switch module 21 to enter a saturation state, thereby providing a starting voltage for the coil of the relay RLY1; and

[0056] When the flow capacity of the power supply voltage is less than the preset value after a preset time, the switch module 21 is controlled to enter the amplification state, so that the voltage regulating module 22 adjusts the voltage received by the coil of the relay RLY1 to the preset voltage.

[0057] Specifically, when the controller 10 outputs the drive signal, the drive unit 231 begins operating based on the drive signal. Once the drive unit 231 begins operating, the power voltage of the power supply 30 is input to the circulation unit 232 through the drive unit 231. Within a preset timeframe, the circulation unit 232 receives the power voltage and directly transmits it to the control terminal of the switch module 21 (with a flow capacity greater than or equal to a preset value). This causes the switch module 21 to enter a saturated state based on the power voltage, thereby providing a starting voltage for the coil of the relay RLY1. After the preset timeframe, the power voltage is partially consumed by the circulation unit 232 (i.e., the flow capacity of the circulation unit 232 becomes less than the preset value), causing the voltage transmitted to the switch module 21 to decrease, thereby causing the switch module 21 to enter an amplified state.

[0058] In another embodiment, see Figure 3 , Figure 3 is a circuit diagram of a relay drive circuit provided by an embodiment of the present invention, such as Figure 3 As shown, the driving unit 231 is a switch tube Q3; the flow unit 232 includes a capacitor C1, a resistor R1 and a resistor R2;

[0059] The control end of the switch tube Q3 is used to receive a driving signal. The first end of the switch tube Q3 is connected to the circulation unit 232 , and the second end of the switch tube Q3 is connected to the power supply 30 .

[0060] The resistor R2 is connected to the driving unit 231 through the resistor R1 . The resistor R2 is also connected to the switch module 21 . The capacitor C1 is connected in parallel to the resistor R1 .

[0061] Specifically, after the controller 10 outputs a drive signal, the switch Q3 is turned on based on the drive signal, thereby inputting the power supply voltage of the power supply 30 into the circulation unit 232. Because the voltage across a capacitor cannot change suddenly, the capacitor C1 is effectively short-circuited at the moment it receives the power supply voltage, causing the power supply 30 to provide the power supply voltage to the switch module 21 through the resistor R2. While the power supply voltage continues to be output, the capacitor C1 charges based on the power supply voltage. When the capacitor C1 charges, the resistor R1 is short-circuited by the capacitor C1, and the resistor R1 is deactivated. The power supply voltage continues to supply power to the switch module 21 through the capacitor C1 and resistor R2. When the capacitor C1 is fully charged (i.e., after a predetermined time), the capacitor C1 is effectively disconnected, the resistor R1 begins to operate, and the power supply voltage is input to the switch module 21 after being divided by the resistors R1 and R2.

[0062] In yet another embodiment, Figure 3 As shown, the switch module 21 includes a switch tube Q1 and a resistor R3;

[0063] The control end of the switch tube Q1 is connected to the circulation unit 232, and the control end of the switch tube Q1 is also grounded through the resistor R3. The first end of the switch tube Q1 is connected to the power supply 30, and the second end of the switch tube Q1 is respectively connected to the coil end of the relay RLY1 and the voltage regulation module 22.

[0064] Specifically, when the switch Q3 is turned on based on the drive signal, the resistor R1 stops operating because the capacitor C1 is short-circuited. The power supply 30 provides a voltage to the control terminal of the switch Q1 through the resistor R2. The voltage received by the control terminal of the switch Q1 is greater than or equal to the first voltage, and the switch Q1 enters a saturation state based on this voltage. While the capacitor C1 is charging, the control terminal of the switch Q1 continues to receive a voltage greater than or equal to the first voltage and continues to operate in a saturation state based on this voltage. When the capacitor C1 is fully charged (i.e., after a predetermined time), the resistors R1 and R2 jointly divide the power supply voltage, thereby reducing the voltage input to the switch Q1. At this point, the voltage received by the switch Q1 is less than the first voltage and greater than the second voltage (preventing the switch Q1 from entering the cutoff state), thereby causing the switch Q1 to enter an amplification state. It can be known that by setting the resistance values ​​of the resistor R1 and the resistor R2, when the resistor R1 is not working, the switch tube Q1 is in a saturation state, and when the resistor R1 participates in voltage division, the switch tube Q1 is in an amplification state.

[0065] When the switch Q1 is in a saturated state, the power supply voltage of the power supply 30 is directly input to the coil end of the relay RLY1 through the switch Q1, thereby providing a starting voltage for the relay RLY1. When the switch Q1 enters an amplified state, the power supply voltage is input to the coil end of the relay RLY1 through the resistor R1, the resistor R2, and the switch Q1. Simultaneously, the voltage regulator module 22 obtains the voltage output by the switch Q1 and adjusts it to a preset voltage, thereby causing the coil end of the relay RLY1 to continue operating according to the preset voltage.

[0066] In yet another embodiment, Figure 2 As shown, the voltage regulating module 22 includes a comparison unit 221 and a voltage dividing unit 222;

[0067] The comparison unit 221 is respectively connected to the switch module 21, the voltage dividing unit 222 and the coil of the relay RLY1, and the comparison unit 221 is further used to receive a preset voltage;

[0068] The comparison unit 221 is used to receive the voltage output by the switch module 21, and when the voltage output by the switch module 21 is greater than the preset voltage, control the voltage dividing unit 222 to start working, so as to reduce the voltage received by the coil of the relay RLY1; and

[0069] When the voltage output by the switch module 21 is lower than the preset voltage, the voltage dividing unit 222 is controlled to stop working, so that the coil of the relay receives the voltage output by the switch module 21 .

[0070] Specifically, when the switch Q1 is operating in the amplification state, the power supply voltage is simultaneously input to the coil end of the relay RLY1 through the switch Q1 and to the voltage adjustment unit 22. When the comparator unit 221 receives the voltage output by the switch Q1, it compares the voltage with the preset voltage. If the voltage is greater than the preset voltage, the voltage divider unit 222 is activated. This causes the voltage divider unit 222 and the coil of the relay RLY1 to simultaneously consume the voltage output by the switch Q1, thereby reducing the voltage across the coil of the relay RLY1. When the voltage output by the switch Q1 is less than the preset voltage, the voltage divider unit 222 stops operating, and the voltage output by the switch Q1 is directly input to the coil end of the relay RLY1. Based on this, the voltage adjustment unit 22 can adjust the voltage output by the switch Q1 in real time to adjust the voltage received by the coil of the relay RLY1 to the preset voltage.

[0071] In yet another embodiment, Figure 3 As shown, the comparison unit 221 is a comparator U1B; the voltage dividing unit 222 includes a switch tube Q2 and a resistor R4;

[0072] The non-inverting input terminal of the comparator U1B is connected to the switch module 21 , the inverting input terminal of the comparator U1B is used to receive a preset voltage, and the output terminal of the comparator U1B is connected to the voltage divider unit 222 .

[0073] The control end of the switch tube Q2 is connected to the output end of the comparator U1B, the first end of the switch tube Q2 is connected to the switch module 21 through the resistor R4, and the second end of the switch tube Q2 is grounded.

[0074] Specifically, when the switch Q1 enters the amplification state, the power supply voltage is input to the relay RLY1 through the resistors R1, R2, and the switch Q1. It is also input to the non-inverting input of the comparator U1B. Upon receiving this voltage, the comparator U1B controls the switch Q2 to conduct when the voltage exceeds a preset voltage, thereby connecting the resistor R4 in parallel with the coil of the relay RLY1 and reducing the voltage across the coil of the relay RLY1. When the voltage at the non-inverting input of the comparator U1B falls below the preset voltage, the switch Q2 is turned off, causing the resistor R4 to cease voltage division, allowing the voltage output by the switch Q1 to be directly applied to the coil of the relay RLY1. Based on this, by comparing the voltage output by the switch Q1 with the preset voltage in real time, the voltage across the coil of the relay RLY1 is adjusted in real time, thereby maintaining the voltage across the coil of the relay RLY1 at the preset voltage.

[0075] It should be noted that when the switch Q1 is operating in a saturated state, the power supply voltage is directly input through the switch Q1 to the coil of the relay RLY1. Simultaneously, the comparator U1B also receives the power supply voltage. Because the power supply voltage is greater than the preset voltage, the comparator U1B controls the switch Q2 to conduct. At this point, the resistor R4 is connected in parallel with the coil of the relay RLY1, making it easier for the switch Q1 to enter the amplified state.

[0076] The present invention provides a relay drive circuit, comprising a switch module, a voltage regulation module, and a drive module; the drive module is connected to the switch module, and the switch module is respectively connected to a power supply, a relay coil, and the voltage regulation module. The drive module is configured to drive the switch module into a saturated state upon receiving a drive signal, so that the power supply provides a starting voltage to the relay coil via the switch module, thereby activating the relay via the starting voltage. After the relay is activated, the drive module further controls the switch module to an amplified state after a preset operating time, so that the voltage regulation module adjusts the voltage received by the relay coil in real time and controls the relay to continuously operate based on the preset voltage, thereby preventing the relay from overheating due to continuous operation at a high voltage. Furthermore, by providing the starting voltage and the preset voltage to the relay through the same power supply, the use of dual power rails and their redundant control timing is avoided, thereby reducing the cost of the energy storage power supply.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A relay drive circuit, characterized in that: The relay drive circuit includes a switch module, a voltage regulation module and a drive module; The driving module is connected to the switch module, and the switch module is respectively connected to the power supply, the coil of the relay and the voltage regulating module; The driving module is configured to start working after receiving a driving signal to drive the switch module into a saturated state, so that the power supply supplies power to the coil of the relay through the switch module to provide a starting voltage for the coil of the relay; as well as After working for a preset time, controlling the switch module to be in an amplified state; The voltage regulating module is used to adjust the voltage received by the coil of the relay to a preset voltage when the switch module is in the amplified state, wherein the starting voltage is greater than the preset voltage.

2. The relay drive circuit according to claim 1, wherein: The driving module includes a driving unit and a circulation unit; The circulation unit is connected to the driving unit and the switch module respectively, the driving unit is also connected to the power supply, and the driving unit is further used to receive a driving signal; The driving unit is configured to input the power supply voltage of the power supply to the circulation unit according to the driving signal after receiving the driving signal; The circulation unit is configured to have a circulation capacity greater than or equal to a preset value when receiving the power supply voltage within a preset time, so as to control the switch module to enter a saturation state, thereby providing a starting voltage for the coil of the relay; as well as When the flow capacity of the power supply voltage is less than the preset value after a preset time, the switch module is controlled to enter an amplification state, so that the voltage regulating module adjusts the voltage received by the coil of the relay to a preset voltage.

3. The relay drive circuit according to claim 2, wherein: The driving unit is the switch tube Q3; The control end of the switch tube Q3 is used to receive a driving signal, a first end of the switch tube Q3 is connected to the circulation unit, and a second end of the switch tube Q3 is connected to the power supply.

4. The relay drive circuit according to claim 2, wherein: The flow unit includes a capacitor C1, a resistor R1 and a resistor R2; The resistor R2 is connected to the driving unit through the resistor R1 . The resistor R2 is also connected to the switch module. The capacitor C1 is connected in parallel with the resistor R1 .

5. The relay driving circuit according to claim 4, characterized in that: The switch module includes a switch tube Q1 and a resistor R3; The control end of the switch tube Q1 is connected to the circulation unit, and the control end of the switch tube Q1 is also grounded through the resistor R3. The first end of the switch tube Q1 is connected to the power supply, and the second end of the switch tube Q1 is respectively connected to the coil end of the relay and the voltage regulation module.

6. The relay driving circuit according to claim 5, characterized in that: The resistor R1 is configured to stop working within a preset time after receiving the power voltage of the power supply, so that the voltage received by the control terminal of the switch tube Q1 is greater than or equal to the first voltage, thereby causing the switch tube Q1 to enter a saturation state; as well as After receiving the power supply voltage for a preset time, the voltage is divided with the resistor R2 so that the voltage received by the control end of the switch tube Q1 is less than the first voltage and greater than the second voltage, thereby causing the switch tube Q1 to enter an amplification state, wherein the first voltage is greater than the second voltage.

7. The relay driving circuit according to claim 1, wherein: The voltage regulation module includes a comparison unit and a voltage dividing unit; The comparison unit is connected to the switch module, the voltage dividing unit and the coil of the relay respectively, and the comparison unit is further used to receive a preset voltage; The comparison unit is used to receive the voltage output by the switch module, and when the voltage output by the switch module is greater than the preset voltage, control the voltage dividing unit to start working so as to reduce the voltage received by the coil of the relay; as well as When the voltage output by the switch module is less than the preset voltage, the voltage dividing unit is controlled to stop working, so that the coil of the relay receives the voltage output by the switch module.

8. The relay driving circuit according to claim 7, wherein: The comparison unit is a comparator U1B; The non-inverting input terminal of the comparator U1B is connected to the switch module, the inverting input terminal of the comparator U1B is used to receive a preset voltage, and the output terminal of the comparator U1B is connected to the voltage dividing unit.

9. The relay driving circuit according to claim 8, characterized in that: The voltage dividing unit includes a switch tube Q2 and a resistor R4; The control end of the switch tube Q2 is connected to the output end of the comparator U1B, the first end of the switch tube Q2 is connected to the switch module through the resistor R4, and the second end of the switch tube Q2 is grounded.

10. An energy storage power supply, characterized in that: The energy storage power supply comprises: Power supply; relays; Controller; and The relay drive circuit according to any one of claims 1 to 9.

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