Energy storage high-voltage box control circuit and energy storage high-voltage box

Abstract

The utility model relates to the technical field of high-voltage boxes, and discloses an energy storage high-voltage box control circuit and an energy storage high-voltage box. The battery management system comprises a first input interface, a second input interface, an input common interface, a first output interface and a second output interface; the change-over switch is provided with an automatic terminal, a manual terminal and a common terminal, the automatic terminal is electrically connected to the first input interface, the manual terminal is electrically connected to the second input interface, and the common terminal is electrically connected to the input common interface; the circuit breaker comprises a closing electromagnet; the first relay is provided with a first coil end, a second coil end, a first connecting end and a second connecting end, the first coil end and the second coil end are correspondingly and electrically connected to the first output interface and the second output interface, and the first connecting end is electrically connected with a positive electrode or a live wire of the first power supply; the two ends of the closing electromagnet are correspondingly and electrically connected with the second connecting end and the negative electrode or the zero line of the first power supply. The control circuit can control automatic power-on, and automatic and manual switching is achieved.

Description

Technical Field

[0001] This disclosure relates to the field of high-voltage box technology, and more specifically, to a control circuit for an energy storage high-voltage box and an energy storage high-voltage box. Background Technology

[0002] Conventional energy storage systems cannot achieve fully automatic power-on of their high-voltage boxes. The circuit breakers must be manually closed before the Battery Management System (BMS) can automatically control the contactors to power on the system. Especially after troubleshooting, each circuit breaker must be manually switched from the tripped state to the open state before power can be restored. In high-rate charge / discharge systems, high-current circuit breakers are often used, making manual switching even more laborious. Furthermore, in large-scale energy storage systems, a single container may integrate up to twelve battery clusters, meaning operators will manually maintain twelve high-voltage boxes. During the initial system commissioning phase, when software and hardware are not yet fully developed, the system is prone to frequent faults that could cause the high-voltage boxes to shut down, resulting in significant inconvenience for operators and maintenance personnel.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the above-mentioned related technologies and to provide a control circuit for an energy storage high-voltage box and an energy storage high-voltage box.

[0005] According to one aspect of this disclosure, a control circuit for an energy storage high-voltage box is provided, comprising:

[0006] A battery management system includes a first input interface, a second input interface, a common input interface, a first output interface, and a second output interface;

[0007] A changeover switch has an automatic terminal, a manual terminal, and a common terminal. The automatic terminal is electrically connected to the first input interface, the manual terminal is electrically connected to the second input interface, and the common terminal is electrically connected to the input common interface. The automatic terminal and the common terminal are connected in automatic mode, and the manual terminal and the common terminal are connected in manual mode.

[0008] Circuit breaker, including closing electromagnet;

[0009] The first relay has a first coil terminal, a second coil terminal, a first connection terminal, and a second connection terminal. The first coil terminal and the second coil terminal are electrically connected to the first output interface and the second output interface in a one-to-one correspondence. The first connection terminal is used to electrically connect to the positive terminal or live wire of the first power supply. The second connection terminal is electrically connected to one end of the closing electromagnet. The other end of the closing electromagnet is used to electrically connect to the negative terminal or neutral wire of the first power supply.

[0010] In one exemplary embodiment of this disclosure, the circuit breaker further includes a shunt trip unit, the battery management system further includes a third output interface and a fourth output interface; the energy storage high-voltage box control circuit further includes:

[0011] The second relay has a third coil terminal, a fourth coil terminal, a third connection terminal, and a fourth connection terminal. The third coil terminal and the fourth coil terminal are electrically connected to the third output interface and the fourth output interface respectively. The third connection terminal is used to electrically connect to the positive terminal or live wire of the first power supply. The fourth connection terminal is electrically connected to one end of the shunt trip unit. The other end of the shunt trip unit is used to electrically connect to the negative terminal or neutral wire of the first power supply.

[0012] In one exemplary embodiment of this disclosure, the battery management system further includes a third positive output interface and a third negative output interface, the third negative output interface being used to electrically connect to the negative terminal of the second power supply, and the energy storage high-voltage box control circuit further includes:

[0013] The alarm has a first end and a second end, the first end being electrically connected to the positive terminal of a second power supply, and the second end being electrically connected to the third output positive interface.

[0014] In one exemplary embodiment of this disclosure, the energy storage high-voltage box control circuit further includes:

[0015] The third relay has a fifth coil terminal, a sixth coil terminal, a fifth connection terminal, a sixth connection terminal, and a seventh connection terminal. The fifth connection terminal is a common contact, the sixth connection terminal is a normally closed contact, and the seventh connection terminal is a normally open contact. The fifth coil terminal is used to electrically connect to the positive terminal of the second power supply, the fifth connection terminal is electrically connected to the third output positive interface, and the sixth and seventh connection terminals are electrically connected to the second terminal and the sixth coil terminal respectively.

[0016] The reset silence switch is electrically connected between the third output positive interface and the sixth coil terminal.

[0017] In one exemplary embodiment of this disclosure, the energy storage high-voltage box control circuit further includes:

[0018] A reset silencer switch is connected in series with the alarm, and the reset silencer switch is a normally closed switch.

[0019] In one exemplary embodiment of this disclosure, the alarm is an audible and visual alarm.

[0020] In one exemplary embodiment of this disclosure, the battery management system further includes a positive power interface and a negative power interface, the positive power interface and the negative power interface being used for electrically connecting to the second power supply.

[0021] In one exemplary embodiment of this disclosure, the first output interface and the third output interface are shared as one; the first output interface and the third output interface are positive interfaces, or the first output interface and the third output interface are negative interfaces.

[0022] In one exemplary embodiment of this disclosure, the first relay is a normally open relay, and the second relay is a normally open relay.

[0023] According to another aspect of this disclosure, an energy storage high-voltage box is provided, comprising:

[0024] Box;

[0025] The energy storage high-voltage box control circuit is any one of the energy storage high-voltage box control circuits described above, and at least a portion of the energy storage high-voltage box control circuit is disposed inside the box.

[0026] The energy storage high-voltage box control circuit disclosed herein operates in automatic mode when the automatic terminal is connected to the common terminal. When the battery management system detects that it is in automatic mode, it controls the first and second output interfaces to output DC voltage, thereby energizing the coil of the first relay and closing the normally open contact of the first relay. This connects the first and second connection terminals, energizing the closing electromagnet of the circuit breaker and controlling the main contacts of the circuit breaker to close. The circuit breaker then closes, and the energy storage power supply system is powered on. When the manual terminal is connected to the common terminal in manual mode, and the battery management system detects that it is in manual mode, it controls the first and second output interfaces not to output DC voltage, thus preventing the above power-on process from being performed. The operator can manually press the closing / opening button on the circuit breaker body to control the energy storage power supply system to perform power-on.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0029] Figure 1 This is a schematic diagram of the first example embodiment of the energy storage high-voltage box control circuit disclosed herein.

[0030] Figure 2 This is a schematic diagram of the second example embodiment of the energy storage high-voltage box control circuit disclosed herein.

[0031] Figure 3 This is a schematic diagram of the third example embodiment of the energy storage high-voltage box control circuit disclosed herein.

[0032] Figure 4 This is a schematic diagram of the fourth example embodiment of the energy storage high-voltage box control circuit disclosed herein.

[0033] Figure 5 This is a schematic diagram of an example embodiment of the control panel of the high-voltage box disclosed herein.

[0034] Explanation of reference numerals in the attached figures:

[0035] BMS, Battery Management System; DI1, First Input Interface; DI2, Second Input Interface; DIG, Common Input Interface; DO1, First Output Interface; DO2, Second Output Interface; DO3, Third Output Interface; DO4, Fourth Output Interface; DO3+, Third Output Positive Interface; DO3-, Third Output Negative Interface; DC+, Power Positive Interface; DC-, Power Negative Interface;

[0036] SA, Changeover switch; SA1, Automatic terminal; SA2, Manual terminal; SA3, Common terminal.

[0037] SB, reset mute switch;

[0038] KA1, First relay; KA111, First coil terminal; KA112, Second coil terminal; KA121, First connection terminal; KA122, Second connection terminal;

[0039] KA2, second relay; KA211, third coil terminal; KA212, fourth coil terminal; KA221, third connection terminal; KA222, fourth connection terminal;

[0040] KA3, Third Relay; KA311, Fifth Coil Terminal; KA312, Sixth Coil Terminal; KA321, Fifth Connection Terminal; KA322, Sixth Connection Terminal; KA323, Seventh Connection Terminal;

[0041] F, Shunt trip unit; X, Closing electromagnet; M, Motor;

[0042] DY1, First power supply; L, Live wire; N, Neutral wire;

[0043] DY2, Second Power Supply;

[0044] HA, alarm. Detailed Implementation

[0045] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0046] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0047] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0048] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0049] This disclosure provides an example embodiment of an energy storage high-voltage box control circuit, referring to... Figure 1-Figure 4 As shown, the energy storage high-voltage box control circuit may include a battery management system (BMS), a changeover switch (SA), a circuit breaker, and a first relay (KA1). The battery management system (BMS) may include a first input interface (DI1), a second input interface (DI2), an input common interface (DIG), a first output interface (DO1), and a second output interface (DO2). The changeover switch (SA) has an automatic connection terminal (SA1), a manual connection terminal (SA2), and a common connection terminal (SA3). The automatic connection terminal (SA1) is electrically connected to the first input interface (DI1), the manual connection terminal (SA2) is electrically connected to the second input interface (DI2), and the common connection terminal (SA3) is electrically connected to the input common interface (DIG). The connection between the automatic connection terminal (SA1) and the common connection terminal (SA3) is for automatic connection. The circuit breaker can be configured as follows: manual terminal SA2 is connected to common terminal SA3 in manual mode; the circuit breaker can include a closing electromagnet X; the first relay KA1 has a first coil terminal KA111, a second coil terminal KA112, a first connection terminal KA121, and a second connection terminal KA122. The first coil terminal KA111 and the second coil terminal KA112 are electrically connected to the first output interface DO1 and the second output interface DO2 respectively. The first connection terminal KA121 is used to electrically connect to the positive terminal or live wire L of the first power supply DY1. The second connection terminal KA122 is electrically connected to one end of the closing electromagnet X. The other end of the closing electromagnet X is used to electrically connect to the negative terminal or neutral wire N of the first power supply DY1.

[0050] In the energy storage high-voltage box control circuit disclosed herein, the automatic terminal SA1 is connected to the common terminal SA3 in automatic mode. When the battery management system (BMS) detects that it is in automatic mode, it controls the first output interface DO1 and the second output interface DO2 to output DC voltage, thereby energizing the coil of the first relay KA1. The normally open contact of the first relay KA1 closes, thus connecting the first connection terminal KA121 and the second connection terminal KA122, which in turn energizes the closing electromagnet X of the circuit breaker, thereby controlling the main contacts of the circuit breaker to close, completing the circuit breaker closing, and powering the energy storage power supply system. When the manual terminal SA2 is connected to the common terminal SA3 in manual mode, and the battery management system (BMS) detects that it is in manual mode, it controls the first output interface DO1 and the second output interface DO2 not to output DC voltage, thus preventing the above power-on process from being performed. The operator can manually press the closing / opening button on the circuit breaker body to control the energy storage power supply system to perform power-on.

[0051] Each battery cluster / group in an energy storage power station requires a high-voltage energy storage box, which serves as a secondary battery management unit. The power supply circuit of the high-voltage energy storage box is powered by an external power source. The external power source can include a first power supply DY1 and a second power supply DY2. The first power supply DY1 can be an AC power source, including a neutral wire (N) and a live wire (L), with a voltage of AC 220V. The second power supply DY2 can be a DC power source, including a positive and a negative terminal, with a voltage of DC 24V. Of course, in other exemplary embodiments of this disclosure, the first power supply DY1 can be a DC power source, allowing it to include a positive and a negative terminal. The specific voltage of the first power supply DY1 can be set as needed, and will not be elaborated further here.

[0052] The basic working principle of a Battery Management System (BMS) is to sample parameters such as current, voltage, and temperature of each individual battery cell, and then process and analyze these parameters using specific algorithms. Based on the sampling results, the BMS can monitor the battery status in real time and take corresponding management and protection measures.

[0053] Specifically, during charging and operation, the system collects real-time data on individual cell voltage, current, charging / discharging current, and total battery pack voltage. Based on this data, it estimates the battery's state of charge (SOC), state of health (SOH), and state of power (SOP). Active or passive balancing is used to regulate battery voltage and achieve consistency, thereby extending battery life. The balancing control strategy may use individual cell voltage or SOC as the control target parameter, setting thresholds for initiating and ending balancing. When battery parameters exceed safe ranges, the Battery Management System (BMS) takes corresponding protective measures (overcharge protection, over-discharge protection, overcurrent protection, overvoltage protection, short-circuit protection, leakage protection, over-temperature protection, etc.) to prevent battery damage or safety accidents. Real-time monitoring of battery temperature and appropriate heating or cooling control are implemented to ensure the battery operates at its optimal temperature, extending its lifespan. When a battery malfunctions or exhibits abnormal conditions, the BMS issues an alarm and records the fault information. Fault diagnosis functions allow for rapid location and repair of battery faults.

[0054] In this example implementation, refer to Figure 1-Figure 4 As shown, the battery management system (BMS) may include a positive power interface DC+, a negative power interface DC-, a first input interface DI1 (Data Input, DI), a second input interface DI2, an input common interface DIG, a first output interface DO1 (Data Output, DO), and a second output interface DO2.

[0055] The positive (DC+) and negative (DC-) power supply interfaces are used to electrically connect to the second power supply DY2. Specifically, the positive (DC+) interface is connected to the positive terminal of the second power supply DY2, and the negative (DC-) interface is connected to the negative terminal of the second power supply DY2. The second power supply DY2 is a DC power supply with a voltage of approximately 24V. The second power supply DY2 provides power to the Battery Management System (BMS), ensuring its operation.

[0056] Reference Figure 1-Figure 4 As shown, the changeover switch SA has three terminals: an automatic terminal SA1, a manual terminal SA2, and a common terminal SA3. The automatic terminal SA1 is electrically connected to the first input interface DI1, the manual terminal SA2 is electrically connected to the second input interface DI2, and the common terminal SA3 is electrically connected to the input common interface DIG. The automatic terminal SA1 can be a normally closed (NC) contact, and the manual terminal SA2 can be a normally open (NO) contact.

[0057] Adjust the connection between the automatic terminal SA1, the manual terminal SA2, and the common terminal SA3 to switch between automatic and manual modes. Normally, the changeover switch SA is in a closed state, meaning the common terminal SA3 is always connected to the automatic terminal SA1, keeping the energy storage high-voltage box in automatic mode. When the common terminal SA3 of the changeover switch SA is connected to the manual terminal SA2, the energy storage high-voltage box is in manual mode.

[0058] The selector switch SA can be a rotary switch, a toggle switch, a push-button switch, etc.

[0059] In this example embodiment, the circuit breaker can be a low-voltage circuit breaker, also known as an automatic air switch. It can be used to connect and disconnect load circuits, and can also be used to control motors that are not frequently started. Its function is equivalent to some or all of the functions of electrical appliances such as knife switches, overcurrent relays, undervoltage relays, thermal relays, and residual current devices, and it is an important protective electrical appliance in low-voltage distribution networks.

[0060] The circuit breaker may include a switching component, a motor M, a closing electromagnet X, and a shunt trip unit F. The switching component is electrically connected to the circuit formed by the battery pack / bank and the load Load. The switching component can connect and disconnect the battery pack / bank and the load Load. For example, the closing electromagnet X can control the switching component to close to connect the battery pack / bank and the load Load, and the shunt trip unit F can control the switching component to open to disconnect the battery pack / bank and the load Load.

[0061] A relay is an electronic control device with a control system (also known as an input circuit) and a controlled system (also known as an output circuit). The working principle of a relay mainly utilizes electromagnetic induction or certain physical effects to control the on / off state of a circuit. When the relay coil is energized, a magnetic field is generated around it. This magnetic field attracts the contacts, causing them to close or open, thereby controlling the on / off state of the circuit. For electromagnetic relays, the basic principle is to use electromagnetic effects to control mechanical contacts to achieve the on / off purpose. Specifically, when the coil is energized, the coil current generates a magnetic field, which attracts the armature to actuate and open / close the contacts. Solid-state relays, on the other hand, achieve electrical isolation and control of input and output through electronic components.

[0062] In this example implementation, refer to Figure 1-Figure 4 As shown, the first relay KA1 has a first coil terminal KA111, a second coil terminal KA112, a first connection terminal KA121, and a second connection terminal KA122. The first coil terminal KA111 and the second coil terminal KA112 are used to electrically connect to form an input circuit, and the first connection terminal KA121 and the second connection terminal KA122 are used to electrically connect to form an output circuit.

[0063] Specifically, the first coil terminal KA111 and the second coil terminal KA112 are electrically connected to the first output interface DO1 and the second output interface DO2 in a one-to-one correspondence. For example, the first coil terminal KA111 can be electrically connected to the first output interface DO1 and the second coil terminal KA112 can be electrically connected to the second output interface DO2; or the first coil terminal KA111 can be electrically connected to the second output interface DO2 and the second coil terminal KA112 can be electrically connected to the first output interface DO1.

[0064] The first connection terminal KA121 is used to electrically connect to the live wire L of the first power supply DY1, and the second connection terminal KA122 is electrically connected to one end of the closing electromagnet X. The other end of the closing electromagnet X is used to electrically connect to the neutral wire N of the first power supply DY1. Of course, in some other exemplary embodiments of this disclosure, the first connection terminal KA121 can be electrically connected to one end of the closing electromagnet X, and the second connection terminal KA122 can be used to electrically connect to the live wire L of the first power supply DY1. The first power supply DY1 can provide electrical energy to the closing electromagnet X.

[0065] The first power supply DY1 shown in the figure is an AC power supply. Of course, in some other example embodiments of this disclosure, when the first power supply DY1 is a DC power supply, the first connection terminal KA121 is used to electrically connect to the positive terminal of the first power supply DY1, and the other end of the closing electromagnet X is electrically connected to the negative terminal of the first power supply DY1.

[0066] In automatic mode, the Battery Management System (BMS) first performs a power-on self-test, which includes checking system insulation, circuit breaker status, and BMS hardware. After the self-test is complete, the BMS controls the first output interface DO1 and the second output interface DO2 to output a 24V DC voltage, thereby energizing the coil of the first relay KA1. This causes the normally open contact of the first relay KA1 to close, connecting the first connection terminal KA121 and the second connection terminal KA122. Consequently, the closing electromagnet X of the circuit breaker is energized, controlling the main contacts of the circuit breaker to close, completing the circuit breaker closing, and powering the energy storage power supply system.

[0067] When the manual terminal SA2 is connected to the common terminal SA3 in manual mode, and the Battery Management System (BMS) detects that it is in manual mode, the BMS first performs a power-on self-test, which includes system insulation, circuit breaker status, and BMS hardware. After the self-test is completed, the BMS controls the first output interface DO1 and the second output interface DO2 to stop outputting DC voltage, thus preventing the aforementioned power-on process from being executed. The operator can manually control the energy storage power supply system to perform power-on and power-off operations by pressing the close / open button on the circuit breaker body.

[0068] Optionally, refer to Figures 2-4As shown, the battery management system (BMS) may also include a third output interface DO3 and a fourth output interface DO4; the energy storage high-voltage box control circuit may also include a second relay KA2, which has a third coil terminal KA211, a fourth coil terminal KA212, a third connection terminal KA221, and a fourth connection terminal KA222. The third coil terminal KA211 and the fourth coil terminal KA212 are used for electrical connection to form an input circuit, and the third connection terminal KA221 and the fourth connection terminal KA222 are used for electrical connection to form an output circuit.

[0069] Specifically, the third coil terminal KA211 and the fourth coil terminal KA212 are electrically connected to the third output interface DO3 and the fourth output interface DO4 in a one-to-one correspondence. For example, the third coil terminal KA211 can be electrically connected to the third output interface DO3 and the fourth coil terminal KA212 can be electrically connected to the fourth output interface DO4; or the third coil terminal KA211 can be electrically connected to the fourth output interface DO4 and the fourth coil terminal KA212 can be electrically connected to the third output interface DO3.

[0070] The third connection terminal KA221 is used to electrically connect to the live wire L of the first power supply DY1, and the fourth connection terminal KA222 is electrically connected to one end of the shunt trip unit F, with the other end of the shunt trip unit F electrically connected to the neutral wire N of the first power supply DY1. Of course, in some other exemplary embodiments of this disclosure, the third connection terminal KA221 may be electrically connected to one end of the shunt trip unit F, and the fourth connection terminal KA222 may be used to electrically connect to the live wire L of the first power supply DY1. The first power supply DY1 can provide electrical energy to the shunt trip unit F.

[0071] The first power supply DY1 shown in the figure is an AC power supply. Of course, in some other example embodiments of this disclosure, when the first power supply DY1 is a DC power supply, the third connection terminal KA221 is used to electrically connect to the positive terminal of the first power supply DY1, and the other end of the shunt trip unit F is electrically connected to the negative terminal of the first power supply DY1.

[0072] When operators prepare to troubleshoot a system fault, they switch the changeover switch SA to manual mode. This connects the manual terminal SA2 of the changeover switch SA to the common terminal SA3. The second input interface DI2 of the battery management system (BMS) is then connected to the common input interface DIG. The BMS controls the third output interface DO3 and the fourth output interface DO4 to output DC voltage, for example, 24V. This energizes the coil of the second relay KA2, closing its normally open contact. This connects the third connection terminal KA221 to the fourth connection terminal KA222, energizing the shunt trip unit F of the circuit breaker. This causes the main contacts of the circuit breaker to open, completing the tripping process and de-energizing the energy storage power supply system. This prevents operators from operating the circuit while it is energized, ensuring safety.

[0073] Both the first relay KA1 and the second relay KA2 can be electromagnetic relays. The first relay KA1 is a normally open relay, meaning that when the coil of the first relay KA1 is not energized, the contacts of the first relay KA1 are in the open state. The second relay KA2 is also a normally open relay, meaning that when the coil of the second relay KA2 is not energized, the contacts of the second relay KA2 are in the open state.

[0074] In some other exemplary embodiments of this disclosure, the first output interface DO1 and the third output interface DO3 can be shared as one, that is, the first output interface DO1 and the third output interface DO3 are one output interface; the first output interface DO1 and the third output interface DO3 can be positive interfaces, that is, the first relay KA1 and the second relay KA2 share a positive interface.

[0075] Of course, in some other example embodiments of this disclosure, the first output interface DO1 and the third output interface DO3 may be negative interfaces, so that the first relay KA1 and the second relay KA2 share the negative interface.

[0076] Optionally, refer to Figures 3-4 As shown, the battery management system (BMS) may also include a third positive output interface DO3+ and a third negative output interface DO3-. The third positive output interface DO3+ and the third negative output interface DO3- are a pair of passive dry contact interfaces, which can be used as passive switches in conjunction with an external power supply.

[0077] The third output negative interface DO3- is used to electrically connect to the negative terminal of the second power supply DY2. The energy storage high voltage box control circuit may also include an alarm HA. The alarm HA has a first terminal and a second terminal. The first terminal is used to electrically connect to the positive terminal of the second power supply DY2, and the second terminal is electrically connected to the third output positive interface DO3+, so that the alarm HA is electrically connected between the positive terminal of the second power supply DY2 and the third output positive interface DO3+.

[0078] When the Battery Management System (BMS) detects a fault in a battery cluster / group, the BMS controls the third positive output interface DO3+ and the third negative output interface DO3- to conduct, thereby energizing the alarm HA circuit. This causes the alarm HA to activate and quickly alert staff to the battery cluster / group malfunction, allowing for timely repair.

[0079] The alarm HA can be an audible and visual alarm HA, meaning that the alarm HA can simultaneously provide an alarm through both light and sound to enhance the alarm effect. Of course, in some other exemplary embodiments of this disclosure, the alarm HA can also be an audible alarm HA, or an illuminated alarm HA.

[0080] Optionally, refer to Figure 3 As shown, the energy storage high-voltage box control circuit may also include a third relay KA3 and a reset silencer switch SB; the third relay KA3 is a changeover relay, and the third relay KA3 has two coil terminals and three connection terminals. The two coil terminals are the fifth coil terminal KA311 and the sixth coil terminal KA312, and the three connection terminals are the fifth connection terminal KA321, the sixth connection terminal KA322, and the seventh connection terminal KA323.

[0081] The fifth coil terminal KA311 is electrically connected to the positive terminal of the second power supply DY2. The fifth connection terminal KA321 is electrically connected to the third output positive interface DO3+. The sixth connection terminal KA322 and the seventh connection terminal KA323 are electrically connected to the second terminal and the sixth coil terminal KA312 respectively. For example, the sixth connection terminal KA322 is electrically connected to the second terminal of the alarm HA, and the seventh connection terminal KA323 is electrically connected to the sixth coil terminal KA312. The reset silence switch SB is electrically connected between the third output positive interface DO3+ and the sixth coil terminal KA312, so that the reset silence switch SB forms a parallel relationship with the fifth connection terminal KA321 and the seventh connection terminal KA323.

[0082] The fifth connection terminal KA321 is a common contact, the sixth connection terminal KA322 is a normally closed contact, and the seventh connection terminal KA323 is a normally open contact; that is, under normal circumstances, the fifth connection terminal KA321 is connected to the normally closed contact KA322. When the Battery Management System (BMS) detects a fault in the battery cluster / group, the BMS controls the third output positive interface DO3+ and the third output negative interface DO3- to conduct, thus energizing the alarm HA and triggering the alarm to quickly alert staff to the fault in the battery cluster / group. When a fault occurs in the alarm unit, it should be repaired promptly. During the repair, to prevent the alarm HA from frequently alarming and disturbing the operator, the operator should activate the reset silencer switch SB (e.g., press it). The reset silencer switch SB will then change to the closed (connected) state, energizing the coil of the third relay KA3. This causes the normally open contact of the third relay KA3 to close (connecting the fifth connection terminal KA321 to the seventh connection terminal KA323), and the normally closed contact to open (disconnecting the fifth connection terminal KA321 to the sixth connection terminal KA322), forming a self-locking circuit. The audible and visual alarm HA will then stop alarming. When the fault is cleared, the battery management system (BMS) will disconnect the third output positive interface DO3+ and the third output negative interface DO3-, de-energizing the alarm circuit. The coil of the third relay KA3 will also be de-energized, causing the normally closed contact of the third relay KA3 to close (connecting the fifth connection terminal KA321 to the sixth connection terminal KA322), and the normally open contact to open (disconnecting the fifth connection terminal KA321 to the seventh connection terminal KA323). If a fault occurs again, the alarm HA can continue to sound.

[0083] Of course, in some other exemplary embodiments of this disclosure, reference is made to Figure 4 As shown, the energy storage high-voltage box control circuit may also include a reset silencer switch SB. The reset silencer switch SB is electrically connected between the alarm HA and the positive terminal of the third output positive interface DO3+, so that the reset silencer switch SB and the alarm HA are connected in series. The reset silencer switch SB is a normally closed switch, that is, the reset silencer switch SB is generally in the closed state, so that the alarm HA and the third output positive interface DO3+ are connected.

[0084] When the Battery Management System (BMS) detects a fault in a battery cluster / group, the BMS controls the third output positive interface DO3+ and the third output negative interface DO3- to conduct, thus energizing the alarm HA. This activates the alarm HA, quickly alerting staff to the fault and prompting timely repair. During repairs, to prevent frequent alarms from the alarm HA and disrupting the operator's work, the operator can activate the reset silence switch SB (e.g., press it). This resets the silence switch SB to the open (open) state, disconnecting the circuit between the alarm HA and the third output positive interface DO3+, thus de-energizing the alarm HA and stopping it from emitting alarms.

[0085] After the alarm HA sounds, when the operator is preparing to troubleshoot the system fault, they switch the changeover switch SA to manual mode. This means the manual terminal SA2 of the changeover switch SA is connected to the common terminal SA3. The second input interface DI2 of the battery management system (BMS) is then connected to the common input interface DIG. The BMS controls the third output interface DO3 and the fourth output interface DO4 to output DC voltage, for example, 24V. This energizes the coil of the second relay KA2, causing its normally open contact to close. This connects the third connection terminal KA221 to the fourth connection terminal KA222, energizing the shunt trip unit F of the circuit breaker. This causes the main contacts of the circuit breaker to open, completing the tripping process and de-energizing the energy storage power supply system. This prevents operators from operating the circuit while it is energized, ensuring safety.

[0086] Based on the same inventive concept, the present disclosure provides an energy storage high-voltage box, which may include a box body and an energy storage high-voltage box control circuit; the energy storage high-voltage box control circuit is the energy storage high-voltage box control circuit described in any of the above claims, and at least a portion of the energy storage high-voltage box control circuit is disposed in the box body. The specific structure of the energy storage high-voltage box control circuit has been described in detail above, so it will not be repeated here.

[0087] Reference Figure 5 As shown, the "Close" indicator light, "Open" indicator light, first power indicator light (AC220V), second power indicator light (DC24V), "Run" indicator light, and "Alarm" indicator light are located on the control panel of the enclosure for easy viewing by staff. The selector switch SA (manual / automatic) and reset / silence switch SB (silence) are also located on the control panel for easy operation by staff.

[0088] Of course, in some other example embodiments of this disclosure, a closing button and a closing button may also be provided on the control panel; the closing button may be integrated with the closing indicator light or may be separate from it; the closing button may be integrated with the closing indicator light or may be separate from it.

[0089] Compared with the prior art, the beneficial effects of the energy storage high-voltage box provided by the exemplary embodiments of the present invention are the same as the beneficial effects of the energy storage high-voltage box control circuit provided by the above exemplary embodiments, and will not be repeated here.

[0090] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A control circuit for an energy storage high-voltage box, characterized in that, include: A battery management system includes a first input interface, a second input interface, a common input interface, a first output interface, and a second output interface; A changeover switch has an automatic terminal, a manual terminal, and a common terminal. The automatic terminal is electrically connected to the first input interface, the manual terminal is electrically connected to the second input interface, and the common terminal is electrically connected to the input common interface. The automatic terminal and the common terminal are connected in automatic mode, and the manual terminal and the common terminal are connected in manual mode. Circuit breaker, including closing electromagnet; The first relay has a first coil terminal, a second coil terminal, a first connection terminal, and a second connection terminal. The first coil terminal and the second coil terminal are electrically connected to the first output interface and the second output interface in a one-to-one correspondence. The first connection terminal is used to electrically connect to the positive terminal or live wire of the first power supply. The second connection terminal is electrically connected to one end of the closing electromagnet. The other end of the closing electromagnet is used to electrically connect to the negative terminal or neutral wire of the first power supply.

2. The energy storage high-voltage box control circuit according to claim 1, characterized in that, The circuit breaker further includes a shunt trip unit; the battery management system further includes a third output interface and a fourth output interface; the energy storage high-voltage box control circuit further includes: The second relay has a third coil terminal, a fourth coil terminal, a third connection terminal, and a fourth connection terminal. The third coil terminal and the fourth coil terminal are electrically connected to the third output interface and the fourth output interface respectively. The third connection terminal is used to electrically connect to the positive terminal or live wire of the first power supply. The fourth connection terminal is electrically connected to one end of the shunt trip unit. The other end of the shunt trip unit is used to electrically connect to the negative terminal or neutral wire of the first power supply.

3. The energy storage high-voltage box control circuit according to claim 1 or 2, characterized in that, The battery management system further includes a third positive output interface and a third negative output interface. The third negative output interface is used to electrically connect to the negative terminal of the second power supply. The energy storage high-voltage box control circuit further includes: The alarm has a first end and a second end, the first end being electrically connected to the positive terminal of a second power supply, and the second end being electrically connected to the third output positive interface.

4. The energy storage high-voltage box control circuit according to claim 3, characterized in that, The energy storage high-voltage box control circuit also includes: The third relay has a fifth coil terminal, a sixth coil terminal, a fifth connection terminal, a sixth connection terminal, and a seventh connection terminal. The fifth connection terminal is a common contact, the sixth connection terminal is a normally closed contact, and the seventh connection terminal is a normally open contact. The fifth coil terminal is used to electrically connect to the positive terminal of the second power supply, the fifth connection terminal is electrically connected to the third output positive interface, and the sixth and seventh connection terminals are electrically connected to the second terminal and the sixth coil terminal respectively. The reset silence switch is electrically connected between the third output positive interface and the sixth coil terminal.

5. The energy storage high-voltage box control circuit according to claim 3, characterized in that, The energy storage high-voltage box control circuit also includes: A reset silencer switch is connected in series with the alarm, and the reset silencer switch is a normally closed switch.

6. The energy storage high-voltage box control circuit according to claim 3, characterized in that, The alarm is an audible and visual alarm.

7. The energy storage high-voltage box control circuit according to claim 3, characterized in that, The battery management system further includes a positive power interface and a negative power interface, which are used to electrically connect to the second power supply.

8. The energy storage high-voltage box control circuit according to claim 2, characterized in that, The first output interface and the third output interface are shared as one; the first output interface and the third output interface are positive interfaces, or the first output interface and the third output interface are negative interfaces.

9. The energy storage high-voltage box control circuit according to claim 2, characterized in that, The first relay is a normally open relay, and the second relay is a normally open relay.

10. A high-voltage energy storage box, characterized in that, include: Box; The energy storage high-voltage box control circuit is the energy storage high-voltage box control circuit according to any one of claims 1 to 9, wherein at least a portion of the energy storage high-voltage box control circuit is disposed within the box body.

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