Relay driving circuit and energy storage power supply

Abstract

The utility model relates to the technical field of energy storage power supplies, and mainly provides a relay drive circuit and an energy storage power supply, the circuit comprises a relay RLY1, and a time limit control module and a voltage division module which are connected with a coil end of the relay RLY1, and the coil end of the relay RLY1 is connected with a battery. And the time limit control module is used for outputting a control signal to the coil end of the relay RLY1 after receiving the driving signal so as to control the relay RLY1 to be started based on the battery voltage of the battery. When the time-limited control module works for a first preset time, the time-limited control module stops working, and the voltage dividing module starts working after a second preset time after receiving the driving signal, so that the working voltage on the coil end of the relay RLY1 is reduced after the time-limited control module stops working; therefore, the over-temperature condition caused by the fact that the relay RLY1 continuously works under the large voltage is avoided. Therefore, the starting voltage and the maintaining voltage can be provided for the relay RLY1 based on the same power supply, so that the cost of the energy storage power supply is reduced.

Description

[Technical Field]

[0001] This utility model 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 Technology]

[0002] In energy storage power supplies with high protection ratings (such as IP54, IP65, etc.), due to the airtightness of the internal cavity, the internal ambient temperature is usually high under operating conditions, which can easily lead to overheating of the relay coil. There are generally two solutions:

[0003] One approach is to reduce the current-carrying time of the relay coil. PWM control is commonly used to reduce this time, but this method requires significant timer and MCU resources. Furthermore, it can introduce noticeable audible noise, thus limiting its practical application.

[0004] Secondly, the supply voltage of the relay coil can be reduced. Generally, a dual-voltage system (start-up voltage and sustaining voltage) is used to drive the relay. The start-up voltage is typically greater than or equal to the rated voltage of the relay coil, while the sustaining voltage is usually 50% to 70% of the rated voltage. After the relay starts, the sustaining voltage supplies power to the relay coil, thus reducing power consumption. However, this dual-voltage approach requires two power rails, two control I / Os, and related control timing, increasing software complexity and product cost. [Utility Model Content]

[0005] This utility model provides a relay drive circuit and an energy storage power supply, aiming to solve the technical problem of high cost when using energy storage power supply to control relay operation in the prior art.

[0006] To solve the above-mentioned technical problems, one technical solution adopted by this utility model is: to provide a relay driving circuit, the relay driving circuit including a relay RLY1, a time-limited control module and a voltage divider module;

[0007] The coil terminal of the relay RLY1 is connected to the battery. The coil terminal of the relay RLY1 is also connected to the time-limited control module and the voltage divider module respectively. The connection terminal of the relay RLY1 is used to connect to the load. The time-limited control module and the voltage divider module are also used to receive drive signals.

[0008] The time-limited control module is used to start working after receiving the drive signal and output a control signal to the coil terminal of the relay RLY1 to control the coil terminal of the relay RLY1 to start based on the battery voltage; and

[0009] Stop working after the first preset time;

[0010] The voltage divider module is used to start working after receiving the drive signal for a second preset time, and then reduce the working voltage on the coil terminal of the relay RLY1 after the time-limited control module stops working, wherein the first preset time is greater than or equal to the second preset time.

[0011] Optionally, the time-limited control module includes a flow-through unit and a first control unit;

[0012] The current-carrying unit is connected to the first control unit, and the first control unit is connected to the coil terminal of the relay RLY1;

[0013] The current-carrying unit is used to receive the drive signal, and based on the drive signal having a current-carrying capacity greater than or equal to a preset value within a first preset time, to make the voltage received by the control terminal of the first control unit greater than or equal to the on-state voltage, and to operate accordingly; and

[0014] After the first preset time, the current carrying capacity is less than the preset value, so that the voltage received by the control terminal of the first control unit is less than the conduction voltage and the unit stops working.

[0015] Optionally, the current-carrying unit includes a capacitor C1, a resistor R1, and a resistor R3;

[0016] The capacitor C1 is connected to the resistor R3, the resistor R3 is connected to the first control unit, the capacitor C1 is also used to receive the drive signal, and the resistor R1 is connected in parallel with the capacitor C1.

[0017] Optionally, the resistor R1 is used to stop operating within a first preset time period for outputting the drive signal, so that the voltage received by the control terminal of the first control unit is greater than or equal to the on-state voltage; and

[0018] After a first preset time following the output of the drive signal, the voltage is divided by the resistor R3, thereby reducing the on-state voltage.

[0019] Optionally, the first control unit includes a resistor R4 and a switching transistor Q1;

[0020] The control terminal of the switch Q1 is connected to the current-carrying unit. The control terminal of the switch Q1 is also grounded through the resistor R4. The first terminal of the switch Q1 is connected to the coil terminal of the relay RLY1. The second terminal of the switch Q1 is also used for grounding.

[0021] Optionally, the voltage divider module includes a delay unit, a second control unit, and a voltage divider unit;

[0022] The second control unit is connected to the delay unit and the voltage divider unit respectively. The voltage divider unit is also connected to the coil terminal of the relay RLY1. Both the second control unit and the delay unit are used to receive the drive signal.

[0023] The delay unit is used to output a voltage divider signal to the second control unit after receiving the drive signal for a second preset time;

[0024] The second control unit is used to control the voltage divider unit to start working after receiving the voltage divider signal, so that the voltage divider unit divides the battery voltage of the battery, thereby reducing the operating voltage on the coil terminal of the relay RLY1.

[0025] Optionally, the second control unit includes a switching transistor Q2 and a resistor R5;

[0026] The control terminal of the switch Q2 receives the drive signal through the resistor R5. The control terminal of the switch Q2 is also connected to the delay unit. The first terminal of the switch Q2 is connected to the voltage divider unit, and the second terminal of the switch Q2 is used for grounding.

[0027] Optionally, the delay unit includes a capacitor C2 and a resistor R6;

[0028] The capacitor C2 is connected to the control terminal of the switch Q2, and the capacitor C2 is also used for grounding. The resistor R6 is connected in parallel with the capacitor C2.

[0029] Optionally, the voltage divider unit includes a resistor R2;

[0030] The resistor R2 is connected to the coil terminal of the relay RLY1 and the first terminal of the switching transistor Q2, respectively.

[0031] To solve the above-mentioned technical problems, another technical solution adopted in this utility model embodiment is: to provide an energy storage power source, the energy storage power source comprising:

[0032] Controller; and

[0033] The relay drive circuit described above.

[0034] Unlike related technologies, this utility model provides a relay drive circuit and energy storage power supply. The circuit includes a relay RLY1, a time-limited control module, and a voltage divider module. The coil terminal of the relay RLY1 is connected to a battery, and is also connected to the time-limited control module and the voltage divider module. The connection terminal of the relay RLY1 is used to connect to a load. The time-limited control module and the voltage divider module are also used to receive drive signals. The time-limited control module starts working after receiving the drive signal and outputs a control signal to the coil terminal of the relay RLY1 to control the coil terminal of the relay RLY1 to start based on the battery voltage. After the time-limited control module has worked for a first preset time, it stops working. Simultaneously, the voltage divider module starts working after receiving the drive signal for a second preset time to reduce the working voltage on the coil terminal of the relay RLY1 after the time-limited control module stops working, thereby preventing the relay RLY1 from overheating due to continuous operation at high voltage. Based on this, the relay RLY1 can be provided with both start-up and sustaining voltages from the same power source, thereby avoiding the use of dual power rails and their redundant control timing, and thus reducing the cost of the energy storage power source. [Attached Image Description]

[0035] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0036] Figure 1 This is one application scenario provided by an embodiment of the present utility model;

[0037] Figure 2 This is a structural block diagram of a relay driving circuit provided in an embodiment of the present invention;

[0038] Figure 3 This is a circuit diagram of a relay driving circuit provided in an embodiment of the present invention.

Detailed Implementation Methods

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 this utility model and are not intended to limit this utility model.

[0040] The technical features involved in the various embodiments of this application described below do not conflict with each other and can be combined with each other.

[0041] 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 between them.

[0042] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more.

[0043] 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. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0044] Please see Figure 1 , Figure 1 This is one application scenario provided by an embodiment of the present utility model, such as Figure 1 As shown, this application scenario includes an energy storage power supply 100 and a load 200; the energy storage power supply 100 is connected to the load 200, and the energy storage power supply 100 is used to input the stored voltage to the load 200 to provide operating voltage for the load 200. Wherein, as... Figure 1 As shown, the energy storage power supply 100 includes a controller 10, a relay drive circuit 20, and a battery 30. The relay drive circuit 20 is connected to the controller 10, and is also connected to the battery 30 and the load 200. The relay drive circuit 20 receives the drive signal output by the controller 10 and starts working based on the drive signal, thereby inputting the battery voltage of the battery 30 to the load 200, so that the load 200 starts working based on the battery voltage.

[0045] In some embodiments, please refer to Figure 2 , Figure 2 This is a structural block diagram of a relay drive circuit provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the relay drive circuit 20 includes a relay RLY1, a time-limited control module 21, and a voltage divider module 22;

[0046] The coil terminal of the relay RLY1 is connected to the battery 30. The coil terminal of the relay RLY1 is also connected to the time-limited control module 21 and the voltage divider module 22 respectively. The connection terminal of the relay RLY1 is used to connect to the load 200. The time-limited control module 21 and the voltage divider module 22 are also used to receive drive signals.

[0047] The time-limited control module 21 is used to start working after receiving the drive signal and output a control signal to the coil terminal of the relay RLY1 to control the coil terminal of the relay RLY1 to start based on the battery voltage of the battery 30; and

[0048] Stop working after the first preset time;

[0049] The voltage divider module 22 is used to start working after receiving the drive signal for a second preset time, and then reduce the working voltage on the coil terminal of the relay RLY1 after the time limit control module 21 stops working, wherein the first preset time is greater than or equal to the second preset time.

[0050] It is important to understand that when the energy storage power supply 100 needs to supply power to the load 200, the connection terminal of the relay RLY1 needs to be closed to establish a path between the energy storage power supply 100 and the load 200. However, closing the connection terminal of the relay RLY1 requires a relatively large starting voltage input to the coil terminal of the relay RLY1 to drive it. If the coil terminal of the relay RLY1 continues to operate based on this large starting voltage after it has started, it can lead to overheating and damage to the relay RLY1.

[0051] Therefore, in this embodiment, by introducing the time-limited control module 21 and the voltage divider module 22, when the energy storage power supply 100 needs to supply power to the load 200, the time-limited control module 21 receives the drive signal output by the controller 10 and starts working based on the drive signal, thereby applying the battery voltage of the battery 30 to the coil terminal of the relay RLY1, so that the coil terminal of the relay RLY1 starts based on the battery voltage. After the time-limited control module 21 has been working for a first preset time, the time-limited control module 21 stops working, and the voltage divider module 22 starts working after receiving the drive signal for a second preset time. At this time, after the time-limited control module 21 stops working, the voltage divider module 22, together with the coil terminal of the relay RLY1, divides the battery voltage, thereby reducing the voltage at the coil terminal of the relay RLY1. This allows the relay RLY1 to maintain a closed state with a small voltage after starting based on the battery voltage (high voltage), thus avoiding overheating of the coil terminal of the relay RLY1.

[0052] It is understood that if the first preset time is less than the second preset time, the relay RLY1 will also stop working when the time-limited control module 21 stops working. In this case, even if the voltage divider module 22 starts working after the second preset time, the divided battery voltage will not be sufficient to start the relay RLY1. Therefore, it is necessary to ensure that the first preset time is greater than or equal to the second preset time, so that after the relay RLY1 starts working, the voltage divider module 22 starts working earlier than the time the time-limited control module 21 stops working, thereby causing the voltage divider module 22 to begin reducing the operating voltage at the coil terminal of the relay RLY1 when the time-limited control module 21 stops working.

[0053] In some embodiments, such as Figure 2 As shown, the time-limited control module 21 includes a flow-through unit 211 and a first control unit 212;

[0054] The current-carrying unit 211 is connected to the first control unit 212, and the first control unit 212 is connected to the coil terminal of the relay RLY1;

[0055] The current-carrying unit 211 is used to receive the driving signal, and based on the driving signal having a current-carrying capacity greater than or equal to a preset value within a first preset time, to make the voltage received by the control terminal of the first control unit 212 greater than or equal to the on-state voltage, and to operate accordingly; and

[0056] After the first preset time, the current carrying capacity is less than the preset value, so that the voltage received by the control terminal of the first control unit 212 is less than the conduction voltage and stops working.

[0057] Specifically, the drive signal is a continuous high-level signal. When the controller 10 outputs the drive signal to the current-carrying unit 211, the current-carrying unit 211 receives the drive signal and, within a first preset time, directly transmits the voltage corresponding to the drive signal to the control terminal of the first control unit 212, so that the first control unit 212 is in a conducting state based on the voltage. After the first preset time, a portion of the voltage corresponding to the drive signal is consumed by the current-carrying unit 211 (i.e., the current-carrying capacity of the current-carrying unit 211 is less than the preset value), causing the voltage transmitted to the first control unit 212 to decrease. Consequently, the voltage received by the control terminal of the first control unit 212 is less than the conduction voltage, and the first control unit 212 stops working.

[0058] In another embodiment, please refer to Figure 3 , Figure 3 This is a circuit diagram of a relay driving circuit provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the current-carrying unit 211 includes a capacitor C1, a resistor R1, and a resistor R3; the first control unit 212 includes a resistor R4 and a switching transistor Q1.

[0059] The capacitor C1 is connected to the resistor R3, the resistor R3 is connected to the first control unit 212, the capacitor C1 is also used to receive the drive signal, and the resistor R1 is connected in parallel with the capacitor C1.

[0060] The control terminal of the switch Q1 is connected to the current-carrying unit 211. The control terminal of the switch Q1 is also grounded through the resistor R4. The first terminal of the switch Q1 is connected to the coil terminal of the relay RLY1. The second terminal of the switch Q1 is also used for grounding.

[0061] Specifically, after the controller 10 outputs the drive signal, since the voltage across the capacitor cannot change abruptly, the capacitor C1 is effectively short-circuited the instant it receives the drive signal. This allows the drive signal to be directly input to the control terminal of the switch Q1 through the resistor R3, causing the switch Q1 to conduct. When the switch Q1 is on, the battery 30, the coil terminal of the relay RLY1, and the switch Q1 form a circuit, energizing the coil terminal of the relay RLY1 and closing the relay RLY1. During the continuous output of the drive signal, the capacitor C1 charges based on the drive signal. When the capacitor C1 is charging, the resistor R1 is short-circuited by the capacitor C1, and the resistor R1 does not work. The drive signal continuously provides the conduction voltage to the switch Q1 through the capacitor C1 and the resistor R3. When capacitor C1 is fully charged (i.e., after the first preset time), capacitor C1 is effectively open-circuited, and resistor R1 begins to operate. The drive signal, after being divided by resistors R1 and R3, is input to the control terminal of switch Q1. At this time, resistors R1, R3, and R4 collectively divide the voltage corresponding to the drive signal, thereby reducing the voltage input to switch Q1, and thus causing switch Q1 to be in the off state. It can be seen that by setting the resistance values ​​of resistors R1, R3, and R4, switch Q1 can be made to be in the on state when resistor R1 is not operating, and in the off state when resistor R1 participates in voltage division.

[0062] In yet another embodiment, such as Figure 2 As shown, the voltage divider module 22 includes a delay unit 221, a second control unit 222, and a voltage divider unit 223;

[0063] The second control unit 222 is connected to the delay unit 221 and the voltage divider unit 223 respectively. The voltage divider unit 223 is also connected to the coil terminal of the relay RLY1. Both the second control unit 222 and the delay unit 221 are used to receive the drive signal.

[0064] The delay unit 221 is used to output a voltage divider signal to the second control unit 222 after receiving the drive signal for a second preset time;

[0065] The second control unit 222 is used to control the voltage divider unit 223 to start working after receiving the voltage divider signal, so that the voltage divider unit 223 divides the battery voltage of the battery 30, thereby reducing the working voltage on the coil terminal of the relay RLY1.

[0066] Specifically, when the controller 10 outputs the drive signal, the delay unit 221 receives the drive signal and outputs a voltage divider signal to the second control unit 222 after receiving the drive signal for a second preset time. This causes the second control unit 222 to control the voltage divider unit 223 to start working based on the voltage divider signal, so that the voltage divider unit 223 and the coil terminal of the relay RLY1 divide the battery voltage, thereby reducing the voltage on the coil terminal of the relay RLY1.

[0067] In some embodiments, such as Figure 3 As shown, the second control unit 222 includes a switching transistor Q2 and a resistor R5; the delay unit 221 includes a capacitor C2 and a resistor R6; and the voltage divider unit 223 includes a resistor R2.

[0068] The control terminal of the switch Q2 receives the drive signal through the resistor R5. The control terminal of the switch Q2 is also connected to the delay unit 221. The first terminal of the switch Q2 is connected to the voltage divider unit 223, and the second terminal of the switch Q2 is used for grounding.

[0069] The capacitor C2 is connected to the control terminal of the switch Q2, and the capacitor C2 is also used for grounding. The resistor R6 is connected in parallel with the capacitor C2.

[0070] The resistor R2 is connected to the coil terminal of the relay RLY1 and the first terminal of the switching transistor Q2, respectively.

[0071] Specifically, when the controller 10 outputs a drive signal, the drive signal is input to the capacitor C2 to charge it. Once the capacitor C2 is fully charged, the switch Q2 turns on based on the voltage stored in the capacitor C2, thus forming a circuit with the battery 30, the coil terminal of the relay RLY1, the resistor R2, and the switch Q2. At this time, the resistor R2 and the coil terminal of the relay RLY1 together divide the battery voltage of the battery 30, thereby reducing the voltage at the coil terminal of the relay RLY1 and preventing the relay RLY1 from overheating. The value of the resistor R2 must be chosen to ensure that the relay RLY1 can be properly engaged while reducing its power consumption.

[0072] It should be noted that when both switching transistors Q1 and Q2 are turned on simultaneously, resistor R2 is short-circuited by switching transistor Q1, thus preventing resistor R2 from participating in voltage division. Therefore, when switching transistor Q2 starts working, switching transistor Q1 needs to be deactivated so that resistor R2 can participate in voltage division. When setting the capacitance values ​​of capacitors C1 and C2, it is necessary to ensure that when switching transistor Q2 turns on based on the voltage stored in capacitor C2, capacitor C1 is not yet fully charged, thus avoiding a situation where switching transistor Q1 is turned off before switching transistor Q2 turns on.

[0073] In some embodiments, such as Figure 3 As shown, when the controller 10 outputs a drive signal, capacitor C1 is short-circuited based on the drive signal. The drive signal is directly input to the control terminal of the switch Q1 through resistor R3, thereby turning on the switch Q1. The coil terminal of the relay RLY1 is activated by the battery 30, and the energy storage power supply 100 begins to work for the load 200. Simultaneously, capacitor C2 is charged based on the drive signal. When capacitor C2 is fully charged, the switch Q2 is turned on based on capacitor C2, thus connecting the coil terminal of the relay RLY1 in series with resistor R2. At this time, when capacitor C1 is fully charged, resistors R1, R3, and R4 begin to divide the voltage. The switch Q1 is turned off and stops working. The coil terminal of the relay RLY1 and resistor R2 divide the battery voltage of the battery 30, thereby reducing the voltage on the coil terminal of the relay RLY1 and preventing overheating of the relay RLY1.

[0074] This invention provides a relay drive circuit, comprising a relay RLY1, a time-limited control module, and a voltage divider module. The coil terminal of the relay RLY1 is connected to a battery, and is also connected to both the time-limited control module and the voltage divider module. The connection terminal of the relay RLY1 is used to connect to a load. The time-limited control module and the voltage divider module are also used to receive drive signals. The time-limited control module starts working upon receiving the drive signal and outputs a control signal to the coil terminal of the relay RLY1 to control the relay RLY1 to start based on the battery voltage. After the time-limited control module has worked for a first preset time, it stops working. Simultaneously, the voltage divider module starts working after receiving the drive signal for a second preset time to reduce the operating voltage on the coil terminal of the relay RLY1 after the time-limited control module stops working, thereby preventing the relay RLY1 from overheating due to continuous operation at high voltage. Based on this, the relay RLY1 can be provided with both start-up and sustaining voltages from the same power source, thereby avoiding the use of dual power rails and their redundant control timing, and thus reducing the cost of the energy storage power source.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above, which are not provided in detail for the sake of brevity; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A relay drive circuit, characterized by comprising: The relay drive circuit includes a relay RLY1, a time-limited control module, and a voltage divider module; The coil terminal of the relay RLY1 is connected to the battery. The coil terminal of the relay RLY1 is also connected to the time-limited control module and the voltage divider module respectively. The connection terminal of the relay RLY1 is used to connect to the load. The time-limited control module and the voltage divider module are also used to receive drive signals. The time-limited control module is used to start working after receiving the drive signal and output a control signal to the coil terminal of the relay RLY1 to control the coil terminal of the relay RLY1 to start based on the battery voltage; and Stop working after the first preset time; The voltage divider module is used to start working after receiving the drive signal for a second preset time, and then reduce the working voltage on the coil terminal of the relay RLY1 after the time-limited control module stops working, wherein the first preset time is greater than or equal to the second preset time.

2. The relay drive circuit according to claim 1, characterized by The time-limited control module includes a flow-through unit and a first control unit; The current-carrying unit is connected to the first control unit, and the first control unit is connected to the coil terminal of the relay RLY1; The current-carrying unit is used to receive the driving signal, and based on the driving signal having a current-carrying capacity greater than or equal to a preset value within a first preset time, it operates so that the voltage received by the control terminal of the first control unit is greater than or equal to the conduction voltage. as well as After the first preset time, the current carrying capacity is less than the preset value, so that the voltage received by the control terminal of the first control unit is less than the conduction voltage and the unit stops working.

3. The relay drive circuit according to claim 2, characterized by The current-carrying unit includes a capacitor C1, a resistor R1, and a resistor R3; The capacitor C1 is connected to the resistor R3, the resistor R3 is connected to the first control unit, the capacitor C1 is also used to receive the drive signal, and the resistor R1 is connected in parallel with the capacitor C1.

4. The relay drive circuit according to claim 3, characterized in that, The resistor R1 is used to stop working within a first preset time period of outputting the drive signal, so that the voltage received by the control terminal of the first control unit is greater than or equal to the turn-on voltage. as well as After a first preset time following the output of the drive signal, the voltage is divided by the resistor R3, thereby reducing the on-state voltage.

5. The relay drive circuit according to claim 2, characterized by The first control unit includes a resistor R4 and a switching transistor Q1; The control terminal of the switch Q1 is connected to the current-carrying unit. The control terminal of the switch Q1 is also grounded through the resistor R4. The first terminal of the switch Q1 is connected to the coil terminal of the relay RLY1. The second terminal of the switch Q1 is also used for grounding.

6. The relay drive circuit according to claim 1, characterized by The voltage divider module includes a delay unit, a second control unit, and a voltage divider unit; The second control unit is connected to the delay unit and the voltage divider unit respectively. The voltage divider unit is also connected to the coil terminal of the relay RLY1. Both the second control unit and the delay unit are used to receive the drive signal. The delay unit is used to output a voltage divider signal to the second control unit after receiving the drive signal for a second preset time; The second control unit is configured to control the voltage dividing unit to start working after receiving the voltage dividing signal, so that the voltage dividing unit divides the battery voltage of the battery, thereby reducing the working voltage on the coil end of the relay RLY1.

7. The relay drive circuit according to claim 6, characterized by The second control unit comprises a switch tube Q2 and a resistor R5. The control end of the switch tube Q2 receives the driving signal through the resistor R5, and is also connected with the delay unit. The first end of the switch tube Q2 is connected with the voltage dividing unit, and the second end of the switch tube Q2 is configured to be grounded.

8. The relay drive circuit according to claim 7, characterized by The delay unit comprises a capacitor C2 and a resistor R6. The capacitor C2 is connected with the control end of the switch tube Q2, and is also configured to be grounded. The resistor R6 is connected with the capacitor C2 in parallel.

9. The relay drive circuit according to claim 7, characterized by The voltage dividing unit comprises a resistor R2. The resistor R2 is connected with the coil end of the relay RLY1 and the first end of the switch tube Q2 respectively.

10. An energy storage power supply, characterized by, The energy storage power supply comprises: a controller; and The relay driving circuit according to any one of claims 1-9.

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