A hiccup protection circuit and energy storage system

Abstract

The utility model relates to the technical field of energy storage power supply mainly provides a kind of belching protection circuit and energy storage system, and the belching protection circuit includes switch module, sampling module and protection module. Protection module is connected with sampling module and switch module respectively, switch module is also connected with power supply, and switch module is also connected with load. Protection module is used to determine that load appears failure when the working current collected by acquisition module is greater than preset value, and output and maintain the control signal of preset time to switch module. And switch module receives no control signal, and it will be turned on according to the power signal of received power supply, so that power supply is powered for load;And after receiving control signal, confirm that load appears failure, thereby disconnecting according to control signal, so that power supply stops being powered for load, and further avoid system damage due to overcurrent, effectively improve the security and reliability of energy storage system.

Description

[Technical Field]

[0001] This utility model relates to the technical field of energy storage power supply, and in particular to a hiccup protection circuit and energy storage system. [Background Technology]

[0002] In the power supply and operation of electronic devices, abnormal current often leads to serious problems. Currently, the operating state of loads in various electronic systems is uncertain. When an overload or short circuit occurs at the output, the current in the upstream circuit increases sharply. This excessive current can easily damage related upstream components, leading to equipment failure or even complete inoperability. Furthermore, existing technologies have limitations in monitoring and responding to loads exceeding their normal operating range or exhibiting abnormal states. Some devices cannot respond quickly to abnormal situations and struggle to interrupt the abnormal current transmission path in a short time, causing damage due to prolonged exposure to abnormal current surges, thus reducing equipment reliability and lifespan. [Utility Model Content]

[0003] This utility model provides a hiccup protection circuit and an energy storage system, aiming to solve the technical problems of safety in existing energy storage systems.

[0004] To solve the above-mentioned technical problems, one technical solution adopted by this utility model is: to provide a hiccup protection circuit, which includes a switching module, a sampling module and a protection module;

[0005] The protection module is connected to the sampling module and the switch module respectively. The switch module is also connected to the power supply and the load.

[0006] The protection module is used to output and maintain a control signal to the switching module for a preset time when the operating current collected by the sampling module is greater than a preset value;

[0007] The switching module is used to receive the power signal from the power supply, and to turn on based on the power signal when no control signal is received, so that the power supply provides power to the load; and

[0008] Disconnect after receiving the control signal.

[0009] Optionally, the protection module includes an energy storage unit, a current-carrying unit, and a protection unit;

[0010] The protection unit is connected to the current-carrying unit, the switching module, and the energy storage unit respectively. The energy storage unit is also connected to the switching module, and the current-carrying unit is connected to the switching module.

[0011] The current-carrying unit is used to transmit the operating current to the protection unit when the switching module is turned on and the operating current changes;

[0012] The protection unit is used to output a control signal to the switching module when the operating current is greater than a preset value, so as to disconnect the switching module.

[0013] The energy storage unit is used to discharge to the protection unit when the switching module is disconnected, so that the protection unit maintains the control signal for a preset time.

[0014] Optionally, the preset time is the time required for the stored energy in the energy storage unit to discharge to a preset value.

[0015] Optionally, the energy storage unit is used to charge based on the power supply when the switching module is turned on.

[0016] Optionally, the current-carrying unit is a capacitor C1;

[0017] The capacitor C1 is connected to both the protection unit and the sampling module.

[0018] Optionally, the protection unit includes a switching transistor Q1;

[0019] The control terminal of the switch Q1 is connected to the current-carrying unit, the first terminal of the switch Q1 is connected to the switch module, and the second terminal of the switch Q1 is used for grounding.

[0020] Optionally, the energy storage unit includes a resistor R3 and a capacitor C2;

[0021] The capacitor C2 is connected to the switch module, and the capacitor C2 is also connected to the protection unit through the resistor R3.

[0022] Optionally, the switching module includes a switching transistor Q2 and a resistor R1;

[0023] The control terminal of the switch Q2 is connected to the power supply through the resistor R1, the first terminal of the switch Q2 is connected to the sampling module, and the second terminal of the switch Q2 is connected to the negative terminal of the load.

[0024] Optionally, the sampling module is a resistor R2;

[0025] The first end of the resistor R2 is connected to the negative terminal of the power supply, and the second end of the resistor R2 is connected to the protection module and the switching transistor Q2 respectively.

[0026] To solve the above-mentioned technical problems, another technical solution adopted in this utility model embodiment is: to provide an energy storage system, the energy storage system comprising:

[0027] Power supply;

[0028] Load; and

[0029] The hiccup protection circuit described above.

[0030] Unlike related technologies, this utility model provides a hiccup protection circuit and energy storage system. The hiccup protection circuit includes a switching module, a sampling module, and a protection module. The protection module is connected to both the sampling module and the switching module. The switching module is also connected to a power supply and a load. The protection module determines that the load has failed when the operating current collected by the sampling module exceeds a preset value, and outputs and maintains a control signal to the switching module for a preset time. When the switching module does not receive the control signal, it will turn on according to the power supply signal received from the power supply to power the load. Upon receiving the control signal, it confirms that the load has failed and disconnects according to the control signal, causing the power supply to stop supplying power to the load. This prevents system damage due to overcurrent and effectively improves the safety and reliability of the energy storage system. [Attached Image Description]

[0031] 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.

[0032] Figure 1 This is a structural block diagram of an energy storage system provided by this utility model;

[0033] Figure 2 This is a structural block diagram of a hiccup protection circuit provided in an embodiment of the present invention;

[0034] Figure 3 This is a circuit diagram of a hiccup protection circuit provided in an embodiment of this utility model.

Detailed Implementation Methods

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Please see Figure 1 , Figure 1 This is a structural block diagram of an energy storage system provided by this utility model, such as... Figure 1 As shown, the energy storage system 100 includes a power supply 10, a load 20, and a hiccup protection circuit 30; the hiccup protection circuit 30 is connected to both the power supply 10 and the load 20. The power supply 10 supplies power to the load 20; however, if the load 20 experiences overcurrent or overvoltage faults during the power supply process, it can damage the components in the energy storage system 100. Therefore, during the power supply process, the hiccup protection circuit 30 continuously monitors the operating current of the energy storage system 100 and enters a hiccup mode when the operating current exceeds a preset value. This means that the circuit intermittently stops output to protect the components in the energy storage system 100, thereby improving the reliability and lifespan of the energy storage system 100.

[0041] In some embodiments, the energy storage system 100 further includes an IGBT / MOS transistor (not shown), which is connected to the hiccup protection circuit 30. When the power supply 10 outputs a power signal, the hiccup protection circuit 30 receives the power signal and intermittently outputs the power signal according to the magnitude of the power signal to control the operation of the IGBT / MOS transistor, thereby preventing the IGBT / MOS transistor from experiencing overvoltage or overcurrent.

[0042] In yet another embodiment, please refer to Figure 2 , Figure 2 This is a structural block diagram of a hiccup protection circuit provided in an embodiment of this utility model, as shown below. Figure 2 As shown, the hiccup protection circuit 30 includes a switching module 31, a sampling module 32, and a protection module 33;

[0043] The protection module 33 is connected to the sampling module 32 and the switch module 31 respectively. The switch module 31 is also connected to the power supply 10 and the load 20.

[0044] The protection module 33 is used to output and maintain a control signal to the switch module 31 for a preset time when the operating current collected by the sampling module 32 is greater than a preset value;

[0045] The switching module 31 is used to receive the power signal from the power supply 10, and to turn on based on the power signal when no control signal is received, so that the power supply 10 supplies power to the load 20; and

[0046] Disconnect after receiving the control signal.

[0047] It is understood that after the energy storage system 100 starts working, the power supply 10 will output a power signal. When the power supply 10 just begins outputting the power signal, the switch module 31 will receive the power signal and turn on based on it. At this time, the power signal of the power supply 10 will be output to the load 20 through the switch module 31, so that the power supply 10 can normally supply power to the load 20. During the process of the power supply 10 supplying power to the load 20 through the hiccup protection circuit 30, the sampling module 32 will collect the operating current of the energy storage system 100 in real time and output the operating current to the protection module 33. When the protection module 33 receives the operating current, it will determine whether the operating current is greater than a preset value.

[0048] If the operating current exceeds a preset value (i.e., the load 20 experiences an overcurrent fault), the protection module 33 will output and maintain a control signal to the switch module 31 for a preset time. Upon receiving the control signal, the switch module 31 will disconnect, thus stopping the transmission of the power signal. It should be noted that since the control signal is for a preset time, after the preset time, the protection module 33 will stop outputting the control signal. When the protection module 33 stops outputting the control signal, the switch module 31 will turn on based on the power signal, thereby transmitting the power signal from the power supply 10. At this time, if the protection module 33 receives an operating current exceeding the preset value again, it will again output and maintain a control signal for a preset time, causing the switch module 31 to disconnect again until the fault in the load 20 is eliminated (the operating current is less than the preset value), at which point the hiccup protection circuit 30 will resume normal power signal transmission.

[0049] If the operating current is less than the preset value (no load failure), the protection module 33 will not output the control signal, and the switch module 31 will maintain the conducting state based on the power signal, thereby continuously transmitting the power signal of the power supply 10.

[0050] In yet another embodiment, such as Figure 2 As shown, the protection module 33 includes an energy storage unit 331, a current-carrying unit 332, and a protection unit 333;

[0051] The protection unit 333 is connected to the current-carrying unit 332, the switching module 31 and the energy storage unit 331 respectively. The energy storage unit 331 is also connected to the switching module 31. The current-carrying unit 332 is connected to the switching module 31.

[0052] The current-carrying unit 332 is used to transmit the operating current to the protection unit 333 when the switch module 31 is turned on and the operating current changes.

[0053] The protection unit 333 is used to output a control signal to the switch module 31 when the operating current is greater than a preset value, so as to disconnect the switch module 31.

[0054] The energy storage unit 331 is used to discharge to the protection unit 333 when the switch module 31 is disconnected, so that the protection unit 333 maintains the control signal for a preset time.

[0055] When the switch module 31 is turned on, the power supply 10 will normally supply power to the load 20 based on the hiccup protection circuit 30. At this time, the acquisition module 32 will collect the operating current in the circuit in real time and input the operating current to the current-carrying unit 332. When the operating current received by the current-carrying unit 332 changes, it will transmit the operating current to the protection unit 333. After receiving the operating current, the protection unit 333 will determine whether the operating current is greater than a preset value. If the operating current is less than the preset value, no control signal will be output.

[0056] When the operating current exceeds a preset value, the protection unit 333 will activate, outputting a control signal to the switch module 31 to disconnect the switch module 31. After the switch module 31 is disconnected, the energy storage unit 331 will discharge to the protection unit 333, ensuring that the protection unit 333 continues to operate and maintains the output of the control signal for a preset time.

[0057] In another embodiment, the energy storage unit 331 is used to charge based on the power supply 10 when the switch module 31 is turned on.

[0058] It should be noted that when the switch module 31 is in the ON state, the power supply 10 and the load 20 form a power supply circuit, and the power supply 10 supplies power to the load 20. On the other hand, when the switch module 31 is ON, the energy storage unit 331 is charged based on the electrical energy provided by the power supply 10, wherein the charging voltage is determined based on the voltage across the sampling module 32.

[0059] In another embodiment, it is known that the preset time is the time required for the energy stored in the energy storage unit 331 to discharge to a preset value. Specifically, when the switch module 31 is turned on, the power supply 10 charges the energy storage unit 331. After the switch module 31 is turned off, the energy storage unit 331 discharges to the protection unit 333, thereby keeping the protection unit 333 in an operational state. When the energy stored in the energy storage unit 331 is less than the preset value, the protection unit 333 ceases to operate and stops outputting the control signal. The preset value is determined based on the on-threshold of the protection unit 333.

[0060] In another embodiment, please refer to Figure 3 , Figure 3 This is a circuit diagram of a hiccup protection circuit provided in an embodiment of this utility model, as shown below. Figure 3 As shown, the current-carrying unit 332 is a capacitor C1; the protection unit 333 includes a switching transistor Q1; and the energy storage unit 331 includes a resistor R3 and a capacitor C2.

[0061] The capacitor C1 is connected to the protection unit 333 and the sampling module 32 respectively.

[0062] The control terminal of the switch Q1 is connected to the current-carrying unit 332, the first terminal of the switch Q1 is connected to the switch module 31, and the second terminal of the switch Q1 is used for grounding.

[0063] The capacitor C2 is connected to the switch module 31, and the capacitor C2 is also connected to the protection unit 333 through the resistor R3.

[0064] Specifically, when the load 20 is functioning normally, the power supply 10 supplies power to the load 20, and the switching module 31 is in the ON state. The sampling module 32 inputs the collected operating current to the capacitor C1 in real time. When the load 20 fails, the operating current changes. Due to the characteristics of the capacitor, the voltage on the sampling module 32 is directly applied to the control terminal of the switching transistor Q1. When this voltage exceeds the conduction threshold of the switching transistor Q1, it turns on the switching transistor Q1. Simultaneously, the operating current is also input to the capacitor C2 to charge it. After the switching transistor Q1 is turned on, it outputs a control signal to the switching module 31 to turn it off. When the switching module 31 is turned off, the capacitor C2 begins to discharge through the resistor R3, thereby maintaining the switching transistor Q1 in the ON state. After a preset time, the voltage stored in capacitor C2 will be lower than the preset value, causing the switching transistor Q1 to turn off and thus stop outputting the control signal.

[0065] In other embodiments, such as Figure 3 As shown, the switching module 31 includes a switching transistor Q2 and a resistor R1;

[0066] The control terminal of the switch Q2 is connected to the power supply 10 through the resistor R1, the first terminal of the switch Q2 is connected to the sampling module 32, and the second terminal of the switch Q2 is connected to the load 20.

[0067] Specifically, when the power supply 10 outputs a power signal, the power signal is input to the control terminal of the switching transistor Q2 through the resistor R1, causing the switching transistor Q2 to conduct. Once the switching transistor Q2 is on, the power signal can be normally input to the load 20, thereby supplying power to the load 20. However, if the operating current exceeds a preset value, the switching transistor Q2 will receive the control signal and, based on the control signal, will turn off, causing the power supply 10 to stop supplying power to the load 20.

[0068] In yet another embodiment, such as Figure 3 As shown, the sampling module is a resistor R2; the first end of the resistor R2 is connected to the power supply 10, and the second end of the resistor R2 is connected to the protection module 33 and the switching transistor Q2 respectively.

[0069] When the switch Q2 is turned on, current will flow through the resistor R2. The resistor R2 will collect the operating current flowing through it. When the operating current changes, the capacitor C1 acts as a wire. At this time, the protection module 33 will receive the operating current based on the resistor R2 and output a control signal when the operating current is greater than a preset value.

[0070] In some embodiments, such as Figure 3 As shown, when the power supply 10 supplies power to the load 20 through the hiccup protection circuit 30, the power signal of the power supply 10 is input to the control terminal of the switching transistor Q2 through the resistor R1, so that the switching transistor Q2 is turned on, thereby enabling the power supply 10 to supply power to the load 20 normally. When the load 20 experiences an overcurrent or short circuit fault, the operating current flows back to the hiccup protection circuit 30 through the load 20. At this time, since the switching transistor Q2 is still in the on state, the voltage stored in the capacitor C2 will rise with the operating current; at the same time, the operating current will also flow through the resistor R2, and since the current received by the capacitor C1 changes, the capacitor C1 is equivalent to a wire, so the voltage on the resistor R2 will be applied to the control terminal of the switching transistor Q1, thereby turning on the switching transistor Q1. When the switching transistor Q1 is turned on, the voltage at the control terminal of the switching transistor Q2 is pulled low, the switching transistor Q2 is turned off, and the capacitor C2 begins to discharge to the switching transistor Q1. When the energy stored in capacitor C2 is less than a preset value, switch Q1 is turned off, and switch Q2 will turn on again based on the power signal, thus cycling until the load 20 returns to normal. Based on this, the load can be protected by hiccups when a fault occurs, thereby improving the reliability and service life of the energy storage system 100.

[0071] This utility model embodiment provides a hiccup protection circuit, which includes a switching module, a sampling module, and a protection module. The protection module is connected to both the sampling module and the switching module. The switching module is also connected to a power supply and a load. The protection module determines that the load has failed when the operating current collected by the sampling module exceeds a preset value, and outputs and maintains a control signal to the switching module for a preset time. When the switching module does not receive the control signal, it will turn on according to the power supply signal received from the power supply to power the load. Upon receiving the control signal, it confirms that the load has failed and disconnects according to the control signal, causing the power supply to stop supplying power to the load. This prevents system damage due to overcurrent and effectively improves the safety and reliability of the energy storage system.

[0072] 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 burp protection circuit, characterized by, The hiccup protection circuit includes a switching module, a sampling module, and a protection module; The protection module is connected to the sampling module and the switch module respectively. The switch module is also connected to the power supply and the load. The protection module is used to output and maintain a control signal to the switching module for a preset time when the operating current collected by the sampling module is greater than a preset value; The switching module is used to receive the power signal from the power supply, and to turn on based on the power signal when no control signal is received, so that the power supply can supply power to the load; as well as Disconnect after receiving the control signal.

2. The burp protection circuit of claim 1, wherein, The protection module includes an energy storage unit, a current flow unit, and a protection unit; The protection unit is connected to the current-carrying unit, the switching module, and the energy storage unit respectively. The energy storage unit is also connected to the switching module, and the current-carrying unit is connected to the switching module. The current-carrying unit is used to transmit the operating current to the protection unit when the switching module is turned on and the operating current changes; The protection unit is used to output a control signal to the switching module when the operating current is greater than a preset value, so as to disconnect the switching module. The energy storage unit is used to discharge to the protection unit when the switching module is disconnected, so that the protection unit maintains the control signal for a preset time.

3. The burp protection circuit of claim 2, wherein, The preset time is the time required for the stored energy in the energy storage unit to discharge to a preset value.

4. The burp protection circuit according to claim 2 or 3, characterized in that, The energy storage unit is used to charge the device based on the power supply when the switching module is turned on.

5. The burp protection circuit of claim 2, wherein, The current-passing unit is a capacitor C1; The capacitor C1 is connected to both the protection unit and the sampling module.

6. The burp protection circuit of claim 2, wherein, The protection unit includes a switching transistor Q1; The control terminal of the switch Q1 is connected to the current-carrying unit, the first terminal of the switch Q1 is connected to the switch module, and the second terminal of the switch Q1 is used for grounding.

7. The burp protection circuit of claim 4, wherein, The energy storage unit includes a resistor R3 and a capacitor C2; The capacitor C2 is connected to the switch module, and the capacitor C2 is also connected to the protection unit through the resistor R3.

8. The burp protection circuit according to any of claims 5-7, characterized in that, The switching module includes a switching transistor Q2 and a resistor R1; The control terminal of the switch Q2 is connected to the power supply through the resistor R1, the first terminal of the switch Q2 is connected to the sampling module, and the second terminal of the switch Q2 is connected to the negative terminal of the load.

9. The burp protection circuit of claim 8, wherein, The sampling module is a resistor R2; The first end of the resistor R2 is connected to the negative terminal of the power supply, and the second end of the resistor R2 is connected to the protection module and the switching transistor Q2.

10. An energy storage system characterized by, The energy storage system includes: Power supply; Load; and The hiccup protection circuit as described in any one of claims 1-9.

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