Relay driving circuit and energy storage power supply

Abstract

The invention relates to the field of energy storage power supplies, and mainly provides a relay driving circuit and an energy storage power supply, the circuit comprises a switch module, a driving module and a voltage regulation module, the driving module and the voltage regulation module are connected with the switch module, and the switch module is further connected with a power supply and a coil of a relay. The driving module drives the switch module to enter a saturation state after receiving the driving signal, so that the power supply provides starting voltage for a coil of the relay through the switch module, and the relay is activated. And after the relay is activated, the driving module controls the switch module to be in an amplification state after working for a preset time, so that the voltage regulation module regulates the voltage received by the coil of the relay to control the relay to continuously work based on the preset voltage, and the over-temperature condition caused by the fact that the relay continuously works under high voltage is avoided. And the starting voltage and the preset voltage are provided for the relay through the same power supply, so that the adoption of double power supply rails and redundant control time sequences thereof is avoided, and the cost of the energy storage power supply is reduced.

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: One is to reduce the on-time of the relay coil. Generally, PWM control is used to reduce the on-time of the relay coil, but this method requires more timer and MCU resources. At the same time, this method may also bring obvious audible noise, so this method is not often used in practice.

[0003] The second is to reduce the power supply voltage of the relay coil. Generally, dual voltage (starting voltage and maintaining voltage) is used to drive the relay, where the starting voltage is usually greater than or equal to the rated voltage of the relay coil, and the maintaining voltage is usually 50%~70% of the rated voltage of the relay coil. After the relay is started, the maintaining voltage is used to power the relay coil to reduce the power consumption of the relay coil. However, the dual voltage solution requires 2 power rails and 2 control I / Os as well as related control timing, which increases the complexity of software control and product costs. Summary of the invention

[0004] 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.

[0005] In order to solve the above technical problems, a technical solution adopted by the embodiment of the present invention is: providing a relay driving circuit, the relay driving circuit comprising a switch module, a voltage regulating module and a driving 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 used to start working after receiving the 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 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 an amplified state, wherein the starting voltage is greater than the preset voltage.

[0006] Optionally, 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 also used to receive a driving signal; The driving unit is used for inputting the power supply voltage of the power supply to the circulation unit according to the driving signal after receiving the driving signal; The flow unit is used to control the switch module to enter a saturation state within a preset time when the power supply voltage is received, so as to provide a starting voltage for the coil of the relay; and 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 adjustment module adjusts the voltage received by the coil of the relay to a preset voltage.

[0007] Optionally, the driving unit is a switch tube Q3; 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 flow unit, and the second end of the switch tube Q3 is connected to the power supply.

[0008] Optionally, 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, and the capacitor C1 is connected in parallel with the resistor R1 .

[0009] Optionally, 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.

[0010] Optionally, the resistor R1 is used to stop working within a preset time after receiving the power supply voltage of the power supply, so that the voltage received by the control end of the switch tube Q1 is greater than or equal to the first voltage, thereby making the switch tube Q1 enter a saturation state; and After receiving the power supply voltage for a preset time, it 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 making the switch tube Q1 enter an amplification state, wherein the first voltage is greater than the second voltage.

[0011] Optionally, 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 also 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; and 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.

[0012] Optionally, 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.

[0013] Optionally, 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 used for grounding.

[0014] 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: Power supply; Relay; Controller; and Relay drive circuit as described above.

[0015] Different from the related art, the present invention provides a relay driving circuit and energy storage power supply, the circuit includes a switch module, a voltage regulating module and a driving 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 used to drive the switch module into a saturated state after receiving a driving signal, so that the power supply provides a starting voltage to the coil of the relay through the switch module, so as to activate the relay through the starting voltage. When the relay is activated, the driving module will also control the switch module to be in an amplified state after a preset working time, so that the voltage regulating module adjusts the voltage received by the coil of the relay in real time, and controls the relay to continue to work based on the preset voltage, thereby avoiding the occurrence of overheating caused by the relay continuously working under a large voltage. And the same power supply is used to provide the starting voltage and the preset voltage for the relay, avoiding the use of dual power rails and their redundant control timing, thereby reducing the cost of the energy storage power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0017] Figure 1 is a structural block diagram of an energy storage power supply provided by an embodiment of the present invention; Figure 2 is a structural block diagram of a relay drive circuit provided by an embodiment of the present invention; Figure 3 is a circuit diagram of a relay drive circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 used to limit the present invention.

[0019] It should be noted that, if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, and all are within the protection scope of the present invention. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a different order from the module division in the device schematic diagram or the order in the flow chart.

[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0021] See also Figure 1 , Figure 1 is a structural block diagram of an 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; the relay RLY1 is connected to the relay drive circuit 20, and the relay drive circuit 20 is also connected to the controller 10 and the power supply 30 respectively. The relay drive circuit 20 is used to receive the drive signal output by the controller 10 to start working 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 the preset working time to activate the relay RLY1, so that the relay RLY1 is closed. After the relay drive circuit 20 works for a preset time, the relay drive circuit 20 will adjust the power supply voltage of the power supply 30, and input the adjusted power supply voltage to the coil end of the relay RLY1, so that the relay RLY1 is continuously in a 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 under a high voltage, thereby reducing the loss of the relay RLY1 and improving the reliability of the energy storage power supply 100.

[0022] In some embodiments, see Figure 2 , Figure 2 is a structural block diagram of a relay drive circuit provided by an embodiment of the present invention, such as Figure 2 As shown, the relay driving circuit 20 includes a switch module 21, a voltage regulating module 22 and a driving module 23; 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; The driving module 23 is used to start working after receiving the 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 After working for a preset time, the switch module 21 is controlled to be in an amplified state; The voltage regulating module 22 is used 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.

[0023] Specifically, when the energy storage power supply 100 starts to work, the controller 10 will output a driving signal to the driving module 23, and the driving module 23 will start to work based on the driving signal after receiving the driving signal. At this time, when the driving module 23 works for a preset time, the driving module 23 will control the switch module 21 to work in a saturated state, so that the power supply voltage of the power supply 30 is directly input to the coil of the relay RLY1 through the switch module 21, thereby providing a starting voltage for the relay RLY1, so that the relay RLY1 is closed. After the driving module 23 works for a preset time, the driving module 23 will control the switch module 21 to work in an amplified state. At this time, the voltage adjustment module 22 will obtain the power supply voltage through the switch module 21, and adjust the power supply voltage so that the voltage received by the coil of the relay RLY1 is a preset voltage, so that the relay RLY1 maintains a working state with a smaller voltage, thereby reducing the loss of the relay RLY1.

[0024] In yet another embodiment, Figure 2 As shown, the driving module 23 includes a driving unit 231 and a circulation unit 232; 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, and the driving unit 231 is also used to receive a driving signal; The driving unit 231 is used for inputting the power supply voltage of the power supply 30 to the circulation unit 232 according to the driving signal after receiving the driving signal; The flow unit 232 is used for controlling the switch module 21 to enter a saturation state when the flow capacity is greater than or equal to a preset value within a preset time after receiving the power supply voltage, thereby providing a starting voltage for the coil of the relay RLY1; and When the power supply voltage has a flow capacity less than the preset value after a preset time, the switch module 21 is controlled to enter an amplification state, so that the voltage adjustment module 22 adjusts the voltage received by the coil of the relay RLY1 to a preset voltage.

[0025] Specifically, when the controller 10 outputs the driving signal, the driving unit 231 will start working based on the driving signal. When the driving unit 231 starts working, the power supply voltage of the power supply 30 will be input to the circulation unit 232 through the driving unit 231. When the circulation unit 232 receives the power supply voltage within a preset time, the circulation unit 232 will directly transmit the power supply voltage to the control end of the switch module 21 (the flow capacity is greater than or equal to the preset value), so that the switch module 21 enters a saturated state based on the power supply voltage, thereby providing a starting voltage for the coil of the relay RLY1. After the preset time, a part of the power supply voltage will be consumed by the circulation unit 232 (that is, the flow capacity of the circulation unit 232 is less than the preset value), so that the voltage transmitted to the switch module 21 is reduced, thereby causing the switch module 21 to enter an amplification state.

[0026] In another embodiment, see Figure 3 , Figure 3 is a circuit diagram of a relay driving 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; 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 .

[0027] 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 .

[0028] Specifically, after the controller 10 outputs a driving signal, the switch tube Q3 is turned on based on the driving signal, thereby inputting the power supply voltage of the power supply 30 into the circulation unit 232. Since the voltage across the capacitor cannot change suddenly, the capacitor C1 is equivalent to a short circuit at the moment of receiving the power supply voltage, so that the power supply 30 provides the power supply voltage to the switch module 21 through the resistor R2. In the process of continuous output of the power supply voltage, the capacitor C1 is charged based on the power supply voltage. When the capacitor C1 is charged, the resistor R1 is short-circuited by the capacitor C1, the resistor R1 does not work, and the power supply voltage continues to supply power to the switch module 21 through the capacitor C1 and the resistor R2. When the capacitor C1 is fully charged (that is, after a preset time), the capacitor C1 is equivalent to an open circuit, the resistor R1 starts to work, and the power supply voltage is input to the switch module 21 after being divided by the resistor R1 and the resistor R2.

[0029] In yet another embodiment, Figure 3 As shown, the switch module 21 includes a switch tube Q1 and a resistor R3; 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.

[0030] Specifically, when the switch tube Q3 is turned on based on the driving signal, the resistor R1 stops working because the capacitor C1 is equivalent to a short circuit, and the power supply 30 provides a voltage to the control end of the switch tube Q1 through the resistor R2, wherein the voltage received by the control end of the switch tube Q1 is greater than or equal to the first voltage, and the switch tube Q1 enters a saturation state based on the voltage. When the capacitor C1 is charged, the control end of the switch tube Q1 continues to receive a voltage greater than or equal to the first voltage, and continues to work in a saturation state based on the voltage. When the capacitor C1 is fully charged (that is, after a preset time), the resistor R1 and the resistor R2 jointly divide the power supply voltage, thereby reducing the voltage input to the switch tube Q1. At this time, the voltage received by the switch tube Q1 is less than the first voltage and greater than the second voltage (to prevent the switch tube Q1 from entering a cut-off state), thereby causing the switch tube 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.

[0031] Among them, when the switch tube Q1 is in a saturated state, the power supply voltage of the power supply 30 will be directly input to the coil end of the relay RLY1 through the switch tube Q1, thereby providing a starting voltage for the relay RLY1. When the switch tube Q1 enters an amplified state, the power supply voltage will be input to the coil of the relay RLY1 through the resistor R1, the resistor R2 and the switch tube Q1, and at the same time, the voltage adjustment module 22 will also obtain the voltage output by the switch tube Q1, and adjust the voltage to a preset voltage, so that the coil of the relay RLY1 continues to work according to the preset voltage.

[0032] In yet another embodiment, Figure 2 As shown, the voltage regulating module 22 includes a comparison unit 221 and a voltage dividing unit 222; 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 also used to receive a preset voltage; 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 When the voltage output by the switch module 21 is less 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 .

[0033] Specifically, when the switch tube Q1 is working in the amplification state, the power supply voltage is input into the coil end of the relay RLY1 through the switch tube Q1, and is also input into the voltage adjustment unit 22. When the comparator unit 221 receives the voltage output by the switch tube Q1, the comparison unit 221 compares the voltage with the preset voltage, and controls the voltage divider unit 222 to start working when the voltage is greater than the preset voltage, so that the voltage divider unit 222 and the coil of the relay RLY1 simultaneously consume the voltage output by the switch tube Q1, thereby reducing the voltage on the coil of the relay RLY1. When the voltage output by the switch tube Q1 is less than the preset voltage, the voltage divider unit 222 stops working, and at this time, the voltage output by the switch tube Q1 is directly input into the coil end of the relay RLY1. Based on this, the voltage output by the switch tube Q1 can be adjusted in real time by the voltage adjustment unit 22, so as to adjust the voltage received by the coil of the relay RLY1 to the preset voltage.

[0034] In yet another embodiment, Figure 3As shown, the comparison unit 221 is a comparator U1B; the voltage dividing unit 222 includes a switch tube Q2 and a resistor R4; 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 dividing unit 222 .

[0035] 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.

[0036] Specifically, when the switch tube Q1 enters the amplification state, the power supply voltage is input to the relay RLY1 through the resistor R1, the resistor R2 and the switch tube Q1, and is also input to the non-inverting input terminal of the comparator U1B. After receiving the voltage, the comparator U1B controls the switch tube Q2 to turn on when the voltage is greater than the preset voltage, so that the resistor R4 is connected in parallel with the coil of the relay RLY1, thereby reducing the voltage on the coil of the relay RLY1. When the voltage at the non-inverting input terminal of the comparator U1B is less than the preset voltage, the switch tube Q2 is in the cut-off state, so that the resistor R4 stops dividing the voltage, so that the voltage output by the switch tube Q1 is directly applied to the coil end of the relay RLY1. Based on this, by comparing the voltage output by the switch tube Q1 with the preset voltage in real time, the voltage on the coil of the relay RLY1 is adjusted in real time, so that the voltage on the coil of the relay RLY1 is maintained at the preset voltage.

[0037] It should be noted that when the switch tube Q1 works in a saturated state, the power supply voltage will be directly input to the coil of the relay RLY1 through the switch tube Q1, and at the same time, the comparator U1B will also receive the power supply voltage, and because the power supply voltage is greater than the preset voltage, the comparator U1B will control the switch tube Q2 to be turned on. At this time, the resistor R4 is connected in parallel with the coil of the relay RLY1, so that the switch tube Q1 is easier to enter the amplification state.

[0038] The present invention provides a relay driving circuit, which includes a switch module, a voltage regulating module and a driving module; the driving module is connected to the switch module, and the switch module is respectively connected to a power supply, a coil of a relay and a voltage regulating module. The driving module is used to drive the switch module into a saturated state after receiving a driving signal, so that the power supply provides a starting voltage to the coil of the relay through the switch module, so as to activate the relay through the starting voltage. When the relay is activated, the driving module will also control the switch module to be in an amplified state after a preset working time, so that the voltage regulating module adjusts the voltage received by the coil of the relay in real time, and controls the relay to continue to work based on the preset voltage, thereby avoiding the occurrence of overheating caused by the relay continuously working under a high voltage. And 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.

[0039] 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 them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, 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 driving circuit comprises a switch module, a voltage regulating module and a driving 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 used to start working after receiving the 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 an amplified state, wherein the starting voltage is greater than the preset voltage.

2. The relay drive circuit according to claim 1, characterized in that: 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 also used to receive a driving signal; The driving unit is used for inputting the power supply voltage of the power supply to the circulation unit according to the driving signal after receiving the driving signal; The flow unit is used to control the switch module to enter a saturation state when the flow capacity is greater than or equal to a preset value within a preset time after receiving the power supply voltage, 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 adjustment module adjusts the voltage received by the coil of the relay to a preset voltage.

3. The relay drive circuit according to claim 2, characterized in that: The driving unit is a switch tube Q3; 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 flow unit, and the second end of the switch tube Q3 is connected to the power supply.

4. The relay drive circuit according to claim 2, characterized in that: 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, and the capacitor C1 is connected in parallel with the resistor R1 .

5. The relay drive circuit according to any one of claims 2 to 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 drive circuit according to claim 5, characterized in that: The resistor R1 is used to stop working within a preset time after receiving the power supply voltage of the power supply, so that the voltage received by the control end of the switch tube Q1 is greater than or equal to the first voltage, thereby making the switch tube Q1 enter a saturation state; as well as After receiving the power supply voltage for a preset time, it 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 making the switch tube Q1 enter an amplification state, wherein the first voltage is greater than the second voltage.

7. The relay drive circuit according to claim 1, characterized in that: 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 also 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 drive circuit according to claim 7, characterized in that: 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 used for grounding.

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

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