An intelligent detection and alarm circuit for energy storage system failure

Abstract

The utility model relates to an energy storage system fault intelligent detection alarm circuit, including detection circuit, alarm circuit, detection circuit includes energy storage system connecting end, first transistor, second transistor, capacitor, the base of first transistor, the collector of first transistor, the base of second transistor is connected with energy storage system connecting end respectively, the emitter of first transistor is connected with the emitter of second transistor, one end of capacitor is connected with the base of first transistor, the other end of capacitor is connected with the emitter of second transistor, the collector of second transistor is connected with alarm circuit, when the energy storage system charge -discharge test, if there is no outage failure, then first transistor conduction, second transistor cut -off, capacitor charges, and alarm circuit does not alarm, if there is outage failure, then first transistor cut -off, capacitor discharges, second transistor conduction, and alarm circuit alarms. Can carry out effective detection to the outage failure that energy storage system charge -discharge test appears.

Description

Technical Field

[0001] This utility model relates to the field of fault detection, specifically to an intelligent fault detection and alarm circuit for an energy storage system. Background Technology

[0002] Energy storage systems, as devices capable of storing electrical energy and releasing it when needed, have become a key component of modern energy management systems. These systems typically consist of battery packs, battery management systems (BMS), energy management systems (EMS), power converters (PCS), and other auxiliary electrical equipment, forming a complex and highly integrated energy storage and conversion platform.

[0003] In practical applications, the installation process of energy storage systems is arduous due to the numerous system components and complex connections, requiring significant manpower and resources. However, internal faults may already exist before installation, often preventing the entire system from operating continuously and forcing it into a shutdown state after a period of operation. When a shutdown occurs, step-by-step inspection and fault location are necessary. Completely dismantling the installed system before performing step-by-step inspection and fault location is a repetitive "install-then-dismantle-then-install" process that not only increases maintenance costs but also prolongs system downtime. Conversely, directly performing step-by-step inspection and fault location on the installed system is also significantly more difficult and time-consuming due to the limited space within the cabinet. Therefore, it is typically necessary to perform at least one full charge and discharge test before installation to ensure the system's internal operation. However, a full charge and discharge test is lengthy, and serious faults and shutdowns during the test are highly unpredictable. In addition, multiple energy storage systems are usually tested for charging and discharging at the same time, so it is not easy to identify which one is faulty even if a fault occurs.

[0004] Therefore, developing a circuit or device that can effectively detect shutdown faults that occur during the charging and discharging tests of energy storage systems is of great significance for improving system reliability, reducing operation and maintenance costs, and shortening fault handling time. Utility Model Content

[0005] This invention proposes an intelligent fault detection and alarm circuit for energy storage systems, which can effectively detect shutdown faults that occur during the charging and discharging tests of energy storage systems.

[0006] Therefore, the present invention adopts the following technical solution: An intelligent fault detection and alarm circuit for an energy storage system includes a detection circuit and an alarm circuit. The detection circuit includes an energy storage system connection terminal, a first transistor, a second transistor, and a capacitor. The base, collector, and base of the first transistor are respectively connected to the connection terminal of the energy storage system; the emitter of the first transistor is connected to the emitter of the second transistor. One end of the capacitor is connected to the base of the first transistor, and the other end of the capacitor is connected to the emitter of the second transistor. The collector of the second transistor is connected to the alarm circuit.

[0007] Preferably, a first resistor is connected between the base of the first transistor and the connection terminal of the energy storage system; a second resistor is connected between the collector of the first transistor and the connection terminal of the energy storage system.

[0008] Preferably, a third resistor is connected between the capacitor and the base of the first transistor.

[0009] As a preferred embodiment, the alarm circuit includes a power supply terminal, a third transistor, a silicon controlled rectifier (SCR), a voltage drop diode, a first P-type MOSFET, and a first light-emitting diode (LED). The base of the third transistor is connected to the collector of the second transistor; the emitter of the third transistor is connected to the control electrode of the thyristor, and the connection circuit connecting the emitter of the third transistor and the control electrode of the thyristor is grounded; the collector of the third transistor is connected to the anode of the thyristor; the anode of the thyristor is also connected to the power supply terminal; the cathode of the thyristor is connected to one end of the voltage drop diode, and the other end of the voltage drop diode is connected to the source of the first P-type MOSFET; the gate of the first P-type MOSFET is connected to the power supply terminal; the drain of the first P-type MOSFET is connected to one end of the first light-emitting diode, and the other end of the first light-emitting diode is grounded.

[0010] Preferably, a fourth resistor is connected between the base of the third transistor and the collector of the second transistor.

[0011] Preferably, a fifth resistor is connected between the anode of the thyristor and the power supply terminal.

[0012] Preferably, the other end of the first light-emitting diode is grounded after being connected to the sixth resistor.

[0013] Preferably, the alarm circuit also includes a buzzer, one end of which is connected to the drain of the first P-type MOSFET, and the other end of which is grounded; the first light-emitting diode is connected in parallel with the buzzer.

[0014] Preferably, the alarm circuit also includes a second light-emitting diode and a second P-type MOSFET; One end of the second light-emitting diode is connected to the power supply terminal, and the other end of the second light-emitting diode is connected to the gate of the second P-type MOSFET; the source of the second P-type MOSFET is connected to the drain of the first P-type MOSFET, and the drain of the second P-type MOSFET is grounded.

[0015] Preferably, the drain of the second P-type MOSFET is grounded after being connected to the seventh resistor.

[0016] The beneficial technical effects of this utility model include at least the following: During the charging and discharging testing of the energy storage system, an intelligent fault detection mechanism was designed. When the system is operating normally, the first transistor remains on, while the second transistor is off. During this time, the capacitor charges, and the alarm circuit remains silent. Once a shutdown fault is detected, the circuit state immediately switches: the first transistor turns off, the capacitor begins to discharge, and simultaneously the second transistor turns on, triggering the alarm circuit to issue an alarm. This fault detection scheme can monitor shutdown faults in the energy storage system in real time and accurately, significantly improving the overall reliability of the system, effectively reducing operation and maintenance costs, and greatly shortening fault handling time, thus providing a strong guarantee for the safe and stable operation of the energy storage system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a fault intelligent detection and alarm circuit for an energy storage system is shown.

[0019] In the diagram: 1. First transistor; 2. Second transistor; 3. Third transistor; 4. SCR; 5. Voltage drop diode; 6. First P-type MOSFET; 7. Second P-type MOSFET; 8. First LED; 9. Second LED; 10. Buzzer; 11. Energy storage system connection terminal; 12. First resistor; 13. Second resistor; 14. Third resistor; 15. Capacitor; 16. Fourth resistor; 17. Fifth resistor; 18. Sixth resistor; 19. Seventh resistor; 20. Switch. Detailed Implementation

[0020] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0021] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” are used only to facilitate the description of the embodiments and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Reference Figure 1 As shown, the present invention provides an intelligent fault detection and alarm circuit for an energy storage system, comprising a detection circuit and an alarm circuit. The detection circuit includes an energy storage system connection terminal 11, a first transistor 1, a second transistor 2, and a capacitor 15. The base of the first transistor 1, the collector of the first transistor 1, and the base of the second transistor 2 are respectively connected to the energy storage system connection terminal 11; the emitter of the first transistor 1 is connected to the emitter of the second transistor 2. One end of capacitor 15 is connected to the base of the first transistor 1, and the other end of capacitor 15 is connected to the emitter of the second transistor 2. The collector of the second transistor 2 is connected to the alarm circuit.

[0023] Understandably, during the charging and discharging test of the energy storage system, if no shutdown fault occurs, the first transistor 1 will be turned on, the second transistor 2 will be turned off, the capacitor 15 will be charged, and the alarm circuit will not sound; if a shutdown fault occurs, the first transistor 1 will be turned off, the capacitor 15 will be discharged, the second transistor 2 will be turned on, and the alarm circuit will sound.

[0024] During the charging and discharging test of the energy storage system, an intelligent fault detection mechanism is designed. When the system is operating normally, the first transistor 1 remains on, while the second transistor 2 is off. At this time, capacitor 15 is charging, and the alarm circuit remains silent. Once a shutdown fault is detected, the circuit state immediately switches: the first transistor 1 turns off, capacitor 15 begins discharging, and simultaneously the second transistor 2 turns on, triggering the alarm circuit to issue an alarm. This fault detection scheme can monitor shutdown faults in the energy storage system in real time and accurately, significantly improving the overall reliability of the system, effectively reducing operation and maintenance costs, and greatly shortening fault handling time, providing strong protection for the safe and stable operation of the energy storage system.

[0025] In scenarios involving the detection of outage faults in multiple energy storage systems, each energy storage system needs to be connected to an intelligent fault detection alarm circuit to detect outage faults in multiple energy storage systems. During detection, it is not necessary to constantly monitor the system; one only needs to check whether the corresponding alarm circuit is alarming.

[0026] Furthermore, refer to Figure 1As shown, a first resistor 12 is connected between the base of the first transistor 1 and the energy storage system connection terminal 11; a second resistor 13 is connected between the collector of the first transistor 1 and the energy storage system connection terminal 11.

[0027] Furthermore, refer to Figure 1 As shown, a third resistor 14 is connected between capacitor 15 and the base of the first transistor 1.

[0028] Furthermore, refer to Figure 1 As shown, the alarm circuit includes a power supply terminal, a third transistor 3, a silicon controlled rectifier 4, a voltage drop diode 5, a first P-type MOSFET 6, and a first light-emitting diode 8; The base of the third transistor 3 is connected to the collector of the second transistor 2; the emitter of the third transistor 3 is connected to the control electrode of the thyristor 4, and the connection circuit connecting the emitter of the third transistor 3 and the control electrode of the thyristor 4 is grounded; the collector of the third transistor 3 is connected to the anode of the thyristor 4; the anode of the thyristor 4 is also connected to the power supply terminal; the cathode of the thyristor 4 is connected to one end of the voltage drop diode 5, and the other end of the voltage drop diode 5 is connected to the source of the first P-type MOSFET 6; the gate of the first P-type MOSFET 6 is connected to the power supply terminal; the drain of the first P-type MOSFET 6 is connected to one end of the first light-emitting diode 8, and the other end of the first light-emitting diode 8 is grounded.

[0029] Understandably, when the energy storage system experiences a shutdown fault, capacitor 15 briefly discharges, during which time the second transistor 2, the third transistor 3, and the thyristor 4 conduct. Subsequent continuous discharge through the power supply terminal keeps the thyristor 4 continuously conducting. Furthermore, based on the voltage drop effect of the voltage-drop diode 5, the first P-type MOSFET 6 conducts, thereby causing the first light-emitting diode 8 to emit light, serving as an alarm function. The voltage-drop diode 5 mentioned here can be any diode capable of achieving a voltage drop function.

[0030] In the fault detection mechanism, the discharge time of capacitor 15 is significantly limited. If the alarm circuit is powered solely by its stored charge, the alarm time after a system outage will be short, potentially leading to the fault being overlooked. To address this issue, the system cleverly incorporates a collaborative power supply mechanism consisting of a thyristor 4, the power supply terminal, and the first P-type MOSFET 6. When an energy storage system outage occurs, this mechanism activates immediately, providing continuous and stable power to the alarm circuit, thus enabling uninterrupted alarm operation over extended periods. This design not only ensures timely detection of outage faults but also significantly improves the reliability of outage fault detection, providing a more comprehensive guarantee for the detection of outage faults in energy storage systems.

[0031] Furthermore, refer to Figure 1 As shown, a fourth resistor 16 is connected between the base of the third transistor 3 and the collector of the second transistor 2.

[0032] Furthermore, refer to Figure 1 As shown, a fifth resistor 17 is connected between the anode of the thyristor 4 and the power supply terminal.

[0033] Furthermore, refer to Figure 1 As shown, the other end of the first light-emitting diode 8 is grounded after being connected to the sixth resistor 18.

[0034] Furthermore, refer to Figure 1 As shown, the alarm circuit also includes a buzzer 10, one end of which is connected to the drain of the first P-type MOSFET 6, and the other end of which is grounded; the first light-emitting diode 8 is connected in parallel with the buzzer 10.

[0035] Understandably, when conducting charge and discharge tests on energy storage systems, multiple energy storage systems are usually tested together. Therefore, simply using the first LED 8 to issue an alarm may not be enough to detect the problem. Therefore, an additional buzzer 10 is set up to avoid the problem of the alarm going unnoticed.

[0036] Furthermore, refer to Figure 1 As shown, the alarm circuit also includes a second light-emitting diode 9 and a second P-type MOSFET 7; One end of the second light-emitting diode 9 is connected to the power supply terminal, and the other end of the second light-emitting diode 9 is connected to the gate of the second P-type MOSFET 7; the source of the second P-type MOSFET 7 is connected to the drain of the first P-type MOSFET 6, and the drain of the second P-type MOSFET 7 is grounded.

[0037] Understandably, when the energy storage system is not experiencing a shutdown fault, the first P-type MOSFET is cut off, and the second P-type MOSFET 7 is turned on. At this time, the first LED 8 does not emit light, while the additionally configured second LED 9 emits light (note: the light color of the second LED 9 can be different from that of the first LED 8), thus indicating that the energy storage system is functioning normally. When the energy storage system experiences a shutdown fault, the first P-type MOSFET is turned on, and the second P-type MOSFET 7 is cut off. At this time, the first LED 8 emits light, while the additionally configured second LED 9 does not emit light.

[0038] Furthermore, refer to Figure 1 As shown, the drain of the second P-type MOSFET 7 is grounded after being connected to the seventh resistor 19.

[0039] Furthermore, refer to Figure 1 As shown, an alarm circuit switch 20 can also be installed at the power supply end.

[0040] Understandably, to avoid the second LED 9 remaining constantly lit when the energy storage system is not experiencing a shutdown fault, thus wasting power, an alarm circuit switch 20 is installed at the power supply end to control the power supply to the alarm circuit.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A smart fault detection and alarm circuit for an energy storage system, characterized in that, It includes a detection circuit and an alarm circuit. The detection circuit includes an energy storage system connection terminal, a first transistor, a second transistor, and a capacitor. The base, collector, and base of the first transistor are respectively connected to the connection terminal of the energy storage system; the emitter of the first transistor is connected to the emitter of the second transistor. One end of the capacitor is connected to the base of the first transistor, and the other end of the capacitor is connected to the emitter of the second transistor. The collector of the second transistor is connected to the alarm circuit.

2. The intelligent fault detection and alarm circuit for an energy storage system according to claim 1, characterized in that, A first resistor is connected between the base of the first transistor and the connection terminal of the energy storage system; a second resistor is connected between the collector of the first transistor and the connection terminal of the energy storage system.

3. The intelligent fault detection and alarm circuit for an energy storage system according to claim 1, characterized in that, A third resistor is connected between the capacitor and the base of the first transistor.

4. The intelligent fault detection and alarm circuit for an energy storage system according to claim 1, characterized in that, The alarm circuit includes a power supply terminal, a third transistor, a silicon controlled rectifier (SCR), a voltage drop diode, a first P-type MOSFET, and a first light-emitting diode (LED). The base of the third transistor is connected to the collector of the second transistor; the emitter of the third transistor is connected to the control electrode of the thyristor, and the connection circuit connecting the emitter of the third transistor and the control electrode of the thyristor is grounded; the collector of the third transistor is connected to the anode of the thyristor; the anode of the thyristor is also connected to the power supply terminal; the cathode of the thyristor is connected to one end of the voltage drop diode, and the other end of the voltage drop diode is connected to the source of the first P-type MOSFET; the gate of the first P-type MOSFET is connected to the power supply terminal; the drain of the first P-type MOSFET is connected to one end of the first light-emitting diode, and the other end of the first light-emitting diode is grounded.

5. The intelligent fault detection and alarm circuit for an energy storage system according to claim 4, characterized in that, A fourth resistor is connected between the base of the third transistor and the collector of the second transistor.

6. The intelligent fault detection and alarm circuit for an energy storage system according to claim 4, characterized in that, A fifth resistor is connected between the anode of the thyristor and the power supply terminal.

7. The intelligent fault detection and alarm circuit for an energy storage system according to claim 4, characterized in that, The other end of the first LED is grounded after being connected to the sixth resistor.

8. The intelligent fault detection and alarm circuit for an energy storage system according to claim 4, characterized in that, The alarm circuit also includes a buzzer, one end of which is connected to the drain of the first P-type MOSFET, and the other end of which is grounded; the first light-emitting diode is connected in parallel with the buzzer.

9. The intelligent fault detection and alarm circuit for an energy storage system according to claim 4, characterized in that, The alarm circuit also includes a second light-emitting diode and a second P-type MOSFET; One end of the second light-emitting diode is connected to the power supply terminal, and the other end of the second light-emitting diode is connected to the gate of the second P-type MOSFET; the source of the second P-type MOSFET is connected to the drain of the first P-type MOSFET, and the drain of the second P-type MOSFET is grounded.

10. The intelligent fault detection and alarm circuit for an energy storage system according to claim 9, characterized in that, The drain of the second P-type MOSFET is grounded after being connected to the seventh resistor.

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