Switch module, power supply processing circuit and energy storage system

Abstract

The utility model discloses a switch module, a power supply processing circuit and an energy storage system, and relates to the technical field of switch modules, the switch module comprises a main switch circuit and an auxiliary switch circuit; the main switch circuit is provided with a power input end and a power output end, the power input end is used for being connected with a power supply, the power output end is used for being connected with a load, and the main switch circuit is used for controlling on / off of electric connection between the power input end and the power output end; the auxiliary switch circuit is connected with the controlled end of the main switch circuit, and the auxiliary switch circuit is switched on in response to a received switch-on instruction so as to control the main switch circuit to be switched on; wherein the switching response rate of the auxiliary switching circuit is greater than that of the main switching circuit. According to the technical scheme provided by the invention, the situation of misconduction of the switch module at the PCS output end is reduced, so that the stability of the system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switch module, in particular to a switch module, a power processing circuit and an energy storage system. BACKGROUND

[0002] In the field of power system and industrial control, the power conversion system (PCS) is a key device for the battery charging and discharging process. When the PCS is applied to the energy storage system, the PCS also needs to work in a high-voltage environment because the energy storage system often needs to operate at a high voltage, for example, the DC side may reach 1500V, and the AC side is 220V three-phase AC power.

[0003] In the existing PCS, the on-off function of the PCS may fail due to the high-voltage environment in which the PCS works, because the high-voltage environment has a high interference voltage. When the on-off circuit of the PCS is affected by the interference voltage, the mis-conduction may occur, resulting in unpredictable current, reducing the performance and stability of the energy storage system, and even causing safety hazards. Content of the utility model

[0004] The main purpose of the present application is to provide a switch module, a power processing circuit and an energy storage system, which aims to reduce the mis-conduction of the switch module and improve the stability of the system.

[0005] In the first aspect, to achieve the above purpose, the switch module comprises a main switch circuit and a secondary switch circuit; wherein the main switch circuit has a power input end and a power output end, the power input end is used for connecting a power supply, the power output end is used for connecting a load, and the main switch circuit is used for controlling the electrical connection on / off between the power input end and the power output end; the secondary switch circuit is connected with the controlled end of the main switch circuit, and the secondary switch circuit is used for conducting in response to the received conduction instruction to control the conduction of the main switch circuit; the switching response rate of the secondary switch circuit is greater than the switching response rate of the main switch circuit.

[0006] It can be understood that the switch module has a main switch circuit and a secondary switch circuit, wherein the main switch circuit is used to control the conduction or cut-off of the connection path of the power supply and the load, such as the conduction or cut-off of the path between the battery and the PCS; the secondary switch circuit is used to conduct after receiving the conduction signal and control the conduction of the main switch circuit. The key is that the switching response rate of the main switch circuit is less than that of the secondary switch circuit. When the secondary switch circuit is mis-conducted by the pulse signal, the secondary switch circuit will control the main switch circuit to be conducted, and because the switching response rate of the main switch circuit is less than that of the secondary switch circuit, the secondary switch circuit has re-entered the cut-off state while the main switch circuit is still conducting, and the main switch circuit is no longer conducted. In this way, when the pulse interference signal is received, the secondary switch circuit is conducted, and the main switch circuit is closed. In this way, the mis-conduction of the switch module can be reduced, and the stability of the system can be improved.

[0007] In some embodiments, the main switch circuit is a relay switch, and the secondary switch circuit includes a first switch tube; the relay switch includes a coil, a first static contact, a second static contact, and a moving contact; the first static contact is used to access the power supply input end, the second static contact is used to access the power supply output end, and the moving contact is used to control the electrical connection between the power supply input end and the power supply output end when the moving contact is attracted to the first static contact and the second static contact; the input end of the coil is connected to the loop power supply, and the secondary switch circuit is connected in series between the output end of the coil and the ground.

[0008] It can be understood that the main switch circuit uses a relay, and the secondary switch circuit uses a first switch tube. The relay provides stable mechanical contact connection and strong anti-interference performance. The MOSFET quickly responds to the control signal and quickly cuts off the power supply to the relay coil. The two achieve time difference control and have high cost-effectiveness. Further, when the secondary switch circuit is conducted, the output end of the coil is grounded, thus forming a loop to power on the coil, and after the power reaches a certain level, the moving contact and the first static contact and the second static contact are attached to enter the conduction state. In this way, double control is achieved, and the phenomenon of mis-conduction is effectively avoided.

[0009] In some embodiments, the switch module further includes a protection circuit connected to the main switch circuit and the secondary switch circuit, respectively, for discharging the reverse current generated by the coil.

[0010] It can be understood that when the current in the coil is suddenly interrupted, the inductance will try to maintain the original current flow direction, thus generating a reverse electromotive force. This reverse electromotive force can cause other elements in the circuit (such as the switching tube) to bear an excessively high voltage, which can even damage these elements. Therefore, the present embodiment adopts a protection circuit to manage or discharge these reverse currents to protect other parts of the circuit.

[0011] In some embodiments, the protection circuit comprises a first diode, the input end of the coil is connected to the cathode of the first diode; the anode of the first diode is connected to the auxiliary switching circuit.

[0012] It can be understood that through the first diode, a discharge path is provided for the reverse current, so that the reverse current does not affect other circuit elements.

[0013] In some embodiments, the first end of the first switching tube is connected to the output end of the coil, the second end of the first switching tube is grounded, and the controlled end of the first switching tube is connected to the control instruction receiving end. After the first switching tube receives the control instruction, the first switching tube is turned on to turn on the auxiliary switching circuit.

[0014] It can be understood that when the control instruction receiving end receives a control instruction to turn on the first switching tube, the instruction changes the potential of the controlled end of the first switching tube. Due to the change of the potential of the controlled end, the first switching tube changes from the off state to the on state. In the on state, a low-resistance path is formed between the first end and the second end of the first switching tube, and since the second end of the first switching tube is grounded, the output end of the coil is also grounded. In this way, the electrical energy output by the output end of the coil returns to the input end of the coil through the first diode, forming a loop and turning on the main switching circuit. After the first switching tube switches from the on state to the off state, the output end of the coil of the main switching circuit is no longer grounded, and the coil loop cannot be formed, thus turning off the main switching circuit.

[0015] In some embodiments, the auxiliary switching circuit further comprises a filter circuit, the input end of the filter circuit is connected to the control instruction receiving end, and the output end of the filter circuit is connected to the controlled end of the auxiliary switching circuit.

[0016] It can be understood that the presence of the filter circuit reduces the sensitivity of the system to noise and interference, simplifies the debugging process, and reduces the troubleshooting time.

[0017] In some embodiments, the filter circuit comprises a first resistor and a first capacitor, one end of the first resistor being connected to the control instruction receiving end, one end of the first capacitor, and the controlled end of the first switch tube; the other end of the first resistor being connected to the other end of the first capacitor and the first end of the first switch tube.

[0018] It can be understood that, by the RC filter circuit, the mis-conduction phenomenon caused by glitches and jitter in the control signal can be significantly reduced, and the anti-interference ability and stability of the system are improved.

[0019] In some embodiments, the auxiliary switch circuit further comprises a current-limiting resistor, one end of the current-limiting resistor being connected to the control instruction receiving end, and the other end of the current-limiting resistor being connected to the controlled end of the first switch tube.

[0020] It can be understood that, by the current-limiting resistor, the current flowing from the control instruction receiving end can be limited, and the first switch tube can be prevented from being damaged by excessive current.

[0021] In some embodiments, the main switch circuit comprises at least two relay switches, and the at least two relay switches are arranged in series and / or in parallel.

[0022] It can be understood that, by arranging multiple relay switches in parallel, the system can continue to work normally when one of the relay switches fails, and thus the overall reliability and fault tolerance of the system are improved; by arranging multiple relay switches in series, additional logic judgment can be added, such as turning on the next relay switch only when the voltage reaches a certain value; by arranging in parallel and in series, the advantages of the two cases can be combined.

[0023] In some embodiments, the auxiliary switch circuit comprises at least two first switch tubes, and the at least two first switch tubes are arranged in series and / or in parallel.

[0024] It can be understood that, by arranging multiple first switch tubes in series, even if one of the switch tubes is disturbed and mis-operates, the other switch tubes can still maintain the correct state of the circuit, and the mis-conduction phenomenon can be prevented; by arranging multiple first switch tubes in parallel, the system can continue to work normally when one of the first switch tubes fails, and the overall reliability and fault tolerance of the system are improved.

[0025] In a second aspect, the application also provides a switch module, which comprises a main switch circuit and a secondary switch circuit; the main switch circuit has a power input end and a power output end, the power input end is used for connecting to a power supply, the power output end is used for connecting to a load, and the main switch circuit is used for controlling the electrical connection between the power input end and the power output end; the secondary switch circuit is arranged in series with the main switch circuit, and the secondary switch circuit is used for being turned on when a turn-on instruction is received to control the main switch circuit to be turned on; wherein the switching response rate of the secondary switch circuit is greater than the switching response rate of the main switch circuit.

[0026] It can be understood that the switch module is different from the previous switch module in structure, but can achieve the same beneficial effects. Only when the main switch circuit and the secondary switch circuit are turned on at the same time, the path between the power input end and the power output end can be turned on.

[0027] In some embodiments, the main switch circuit is a relay switch, and the secondary switch circuit comprises a second switch tube; the relay switch comprises a coil, an input end of the coil being used for connecting to a loop power supply; a first static contact, a second static contact and a moving contact, the first static contact being used for connecting to the power input end, the second static contact being used for connecting to the power output end, and the electrical connection between the power input end and the power output end being controlled when the moving contact is attracted to the first static contact and the second static contact; a first end of the second switch tube is connected to the power output end of the second static contact, a second end of the second switch tube is connected to a load, and a controlled end of the second switch tube is connected to a control instruction receiving end; the second switch tube is turned on after receiving a control instruction, and the main switch circuit is turned on.

[0028] It can be understood that the main switch circuit and the secondary switch circuit are arranged in series. When being misdirected on by an interference voltage, if the main switch circuit and the secondary switch circuit are both misdirected on, the main switch circuit is turned on only after the secondary switch circuit is turned off due to the switching response rate of the secondary switch circuit being greater than the switching response rate of the main switch circuit, and the two cannot be turned on at the same time, thereby achieving the anti-misdirected-on function.

[0029] In a third aspect, the application also provides a power supply processing circuit, which comprises the switch module of any one of the above.

[0030] It can be understood that the switch module is applied to the power supply processing circuit. Even in the case of strong transient pulses in the power supply processing circuit, the response time difference between the main switch circuit and the secondary switch circuit can effectively prevent misoperation, thereby greatly reducing the failure rate caused by misdirected-on.

[0031] In some embodiments, the number of switch modules is multiple, and the multiple switch modules are arranged in series and / or in parallel.

[0032] It can be understood that when one switch module fails, the other normally working switch modules can continue to provide power for the power consuming device, thereby improving the overall reliability of the system when arranged in parallel. When arranged in series, it is ensured that the next switch module is turned on only after the voltage of the previous switch module is confirmed to be normal, thereby realizing an effective voltage detection and safety control mechanism. When arranged in series and in parallel, the above two beneficial effects can be realized at the same time.

[0033] In some embodiments, the power supply processing circuit is a three-phase alternating current circuit, and each phase of the alternating current circuit includes at least one switch module.

[0034] It can be understood that the switch module is applied to each phase of the three-phase alternating current circuit, so that each phase of the three-phase circuit can be controlled individually, thereby improving the stability of the entire three-phase alternating current circuit.

[0035] In some embodiments, each phase of the alternating current circuit includes multiple switch modules, and the multiple switch modules are arranged in series and / or in parallel.

[0036] It can be understood that when one switch module fails, the other normally working switch modules can continue to provide power for the power consuming device, thereby improving the overall reliability of the system when arranged in parallel. When arranged in series, it is ensured that the next switch module is turned on only after the voltage of the previous switch module is confirmed to be normal, thereby realizing an effective voltage detection and safety control mechanism. When arranged in series and in parallel, the above two beneficial effects can be realized at the same time.

[0037] In some embodiments, each phase of the alternating current circuit includes two first switch modules arranged in series, and the first switch module includes two switch modules arranged in parallel.

[0038] It can be understood that all the beneficial effects of series and parallel can be realized by four switch modules.

[0039] In a fourth aspect, the present application also provides an energy storage system, which includes a PCS converter, a battery, and a power supply processing circuit as described in any one of the above aspects; the input end of the power supply processing circuit is connected to the battery, the output end of the power supply processing circuit is connected to the input end of the PCS converter, and / or the input end of the power supply processing circuit is connected to the output end of the PCS converter, and the output end of the power supply processing circuit is used to connect a power consuming device.

[0040] It can be understood that the at least one power processing circuit is arranged between the battery and the PCS converter, and the at least one power processing circuit is arranged between the PCS converter and the electrical device, so that the misdirected conduction phenomenon does not occur in the passage between the battery and the PCS converter, and the electrical energy is efficiently and reliably managed in the transmission process. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0042] Figure 1 The structural schematic diagram of the first embodiment of the switch module provided by the present application is shown in the figure.

[0043] Figure 2 The structural schematic diagram of the second embodiment of the switch module provided by the present application is shown in the figure.

[0044] Figure 3 The structural schematic diagram of the third embodiment of the switch module provided by the present application is shown in the figure.

[0045] Figure 4 The structural schematic diagram of the fourth embodiment of the switch module provided by the present application is shown in the figure.

[0046] Figure 5 The structural schematic diagram of the fifth embodiment of the switch module provided by the present application is shown in the figure.

[0047] Figure 6 The structural schematic diagram of the sixth embodiment of the switch module provided by the present application is shown in the figure.

[0048] Figure 7 The structural schematic diagram of the first embodiment of the power processing circuit provided by the present application is shown in the figure.

[0049] Figure 8 The structural schematic diagram of the second embodiment of the power processing circuit provided by the present application is shown in the figure.

[0050] Figure 9 The structural schematic diagram of the first embodiment of the energy storage system provided by the present application is shown in the figure.

[0051] Explanation of reference numerals:

[0052] Switch module 100, main switch circuit 110, power input end 111, power output end 112, controlled end 113, coil 114, input end 1141, output end 1142, first static contact 115, second static contact 116, moving contact 117, auxiliary switch circuit 120, filter circuit 121;

[0053] Power supply processing circuit 200;

[0054] Energy storage system 300, PCS converter 310, battery 320.

[0055] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "include," "have," or "comprise" and variations thereof herein is intended to be equivalent to the term "comprising" and are intended to cover the non-exclusive inclusion of the stated features, integers, steps, components, or the like.

[0058] In the description of the embodiments of the present application, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more (including two), unless otherwise explicitly and specifically limited.

[0059] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0061] In the field of modern power systems and industrial control, power conversion systems (PCS) are widely used in the charging and discharging process of batteries. PCS usually includes DC / AC bidirectional converter, control unit and other components, which receives background control instructions through communication and controls the battery charging or discharging through the converter. When PCS is applied to energy storage systems, high power output such as hundreds of kilowatts or even higher needs to be handled, and high voltage environment such as 1500V DC side and 220V three-phase AC voltage needs to be adapted. In the existing PCS design, the on-off control of the AC side usually uses MOS tubes. When the MOS tube needs to be turned on, the controlled end of the MOS tube can be input with relevant control instructions to turn on the MOS tube.

[0062] Based on the above background, it is noted that the controlled end of the MOS tube switch is easily affected by external interference voltage, leading to frequent false turn-on of the MOS tube, which ultimately leads to system errors, unpredictable current flow, reduced performance and stability of the energy storage system, and even serious safety hazards. Especially in high voltage environment, there is a higher interference voltage, which is more likely to cause the MOS tube to be false turned on without receiving control instructions. Specifically, when uncontrolled interference pulse voltage is generated due to external electromagnetic interference or other reasons, the controlled end of the MOS tube may be turned on instantaneously, i.e. false turn-on.

[0063] In practical applications, the phenomenon of false turn-on of the MOS tube will cause a series of serious problems. First, it will directly affect the stability of the system, making the control system unable to reliably perform the expected operation. Second, frequent false turn-on will cause other components in the circuit to bear unnecessary current impact, thereby accelerating the aging and damage of the equipment. In addition, if the three-phase high-voltage circuit is accidentally turned on due to false turn-on, false turn-on in one phase may cause the other two phases to be affected, thereby generating unbalanced current, which is particularly harmful to motors and other sensitive equipment. More seriously, false turn-on may cause serious electrical faults, and even cause fires and personal injuries. Therefore, it is crucial to improve the anti-interference ability and reliability of the system.

[0064] In some embodiments, a relay can be used instead of a MOS tube. The response time of a relay is usually much slower than that of a semiconductor switch, and the relay needs to be continuously powered to turn on or off, which means that even if there is a short-term interference signal, the relay is less likely to malfunction due to such transient changes. This helps to reduce the phenomenon of false conduction caused by electromagnetic interference to some extent. However, in a high-voltage environment, it is difficult to predict the voltage amplitude and duration of the interference voltage, and the relay may still be misdirected. Therefore, replacing the MOS tube with a relay cannot completely solve the problem. In summary, in a high-voltage environment, the traditional single-switch control mechanism is difficult to cope with the increasingly complex electromagnetic interference environment, especially under high-power output conditions. How to ensure the safe and reliable operation of the PCS has become a problem to be solved.

[0065] Therefore, in order to solve the above problems, the present application proposes a switch module for preventing false conduction, which adopts a double control mechanism, that is, not relying on a single switch to control conduction, and can have high false conduction prevention ability when applied to high-voltage scenarios such as energy storage systems. Specifically, the present application includes two main parts: a main switch circuit and a secondary switch circuit. The main switch circuit receives electrical energy output by the power supply circuit and outputs electrical energy through the power supply output end when the main switch circuit is in a conduction state. The secondary switch circuit is turned on when receiving a control instruction, and controls the main switch circuit to be turned on after being turned on. It should be noted that the key of the present application is that the switching response rate of the secondary switch circuit is much higher than that of the main switch circuit. When there is an interference voltage that causes the secondary switch circuit to be momentarily turned on, due to the fast response characteristics of the secondary switch circuit, the main switch circuit has not been fully turned on, and the secondary switch circuit has been turned off, thereby cutting off the power supply loop of the main switch circuit and preventing false conduction of the main switch circuit. Therefore, the above double control mechanism ensures that the system can effectively resist external interference and maintain stable operation even in a high-voltage environment.

[0066] For the application scenarios of the present switch module, the present application is applicable to energy storage systems, which can effectively prevent false conduction caused by external interference and ensure the safe and stable operation of the energy storage system.

[0067] For application to a power generation side energy storage system, the power generation side energy storage system is mainly used in combination with renewable energy generation technology to form a combined system, which can smooth the output power of renewable energy, reduce the phenomenon of abandoned wind and light, provide system inertia support, and adjust frequency and peak, thereby improving the utilization rate of renewable energy and the stability of the power grid; in some examples, it can include large-scale wind farms, photovoltaic power stations, and hybrid renewable energy power stations (including wind power, solar power, and other renewable energy).

[0068] For the application of energy storage system on the power side, the energy storage system on the power side is mainly used for the user end, helps the user to realize the peak valley arbitrage, improves the power quality management and emergency standby power. This kind of system includes various scenes, from large industrial and commercial users to residential users, to communication base stations, UPS standby power, island microgrid and other special scenes. Large industrial and commercial users can include automobile manufacturing plants, chemical plants, data centers, shopping centers, office buildings, hotels and the like; residential users can include solar home devices, smart homes and the like.

[0069] For the application of energy storage system on the power side, the energy storage system on the power side is mainly used for the user end, helps the user to realize the peak valley arbitrage, improves the power quality management and emergency standby power. This kind of system includes various scenes, from large industrial and commercial users to residential users, to communication base stations, UPS standby power, island microgrid and other special scenes. Large industrial and commercial users can include automobile manufacturing plants, chemical plants, data centers, shopping centers, office buildings, hotels and the like; residential users can include solar home devices, smart homes and the like.

[0070] In addition, the present application can also be applied to other high-voltage industrial control fields that require high reliability, such as grid peak shaving, standby power systems, uninterruptible power supplies (UPS), etc. In these application scenarios, the stability and reliability of the system are crucial, and any misdirecting can lead to serious consequences. By introducing the switch module of the present application, the anti-interference ability of the system can be significantly improved, ensuring reliable operation under various complex working conditions.

[0071] In summary, the present application solves the problem of MOS tube misdirecting caused by interference voltage in the prior art by combining the dual control mechanism of MOS tube and relay, enhances the overall reliability and safety, and provides a more reliable solution for power systems and industrial control in high-voltage environments.

[0072] In addition, in addition to the energy storage system, the switch module is also applicable to other applications that require highly reliable power management, such as data center uninterruptible power supply (UPS) systems, key equipment power protection devices on industrial automation production lines, and precision instruments with extremely high requirements for power quality in medical facilities, etc. In these fields, it is extremely important to ensure that the electrical system can work stably in various complex environments. This switch module not only helps to improve the safety performance of the overall equipment, but also prolongs its service life and reduces maintenance costs.

[0073] In order to solve the above-mentioned problems, realize the reduction of misdirecting of the switch module at the output end of the PCS, and improve the stability of the system. As shown in Figure 1 The switch module 100 proposed in the present application includes a main switch circuit 110 and a secondary switch circuit 120, which controls the conduction of the main switch circuit 110 through the secondary switch circuit 120, thereby realizing a dual control mechanism. The key to preventing misdirecting lies in the fact that the switching response rate of the secondary switch circuit 120 is much greater than that of the main switch circuit 110, which will be explained in detail later.

[0074] In the embodiment, the main switch circuit 110 has a power input end 111 and a power output end 112, the power input end 111 is used to access a power supply, the power output end 112 is used to access a load, and the switch in the main switch circuit 110 is mainly used to control the electrical connection between the power input end 111 and the power output end 112 to be turned on or off. That is, when the main switch circuit 110 is turned on, the power energy of the power supply is output to the load through the power input end 111 and the power output end 112, so that the load enters a working state; when the main switch circuit 110 is turned off, the power energy of the power supply is intercepted and cannot be output to the load. In this way, when applied to an energy storage system, the main switch circuit 110 serves as a main power switch and undertakes the function of turning on or off the circuit during the charging and discharging process of the battery.

[0075] However, in actual applications, such as in high-voltage scenarios, single-switch control is prone to mis-turn-on, which affects the equipment or system to which the switch circuit is applied.

[0076] Therefore, in the embodiment, a secondary switch circuit 120 is provided, which is optionally connected to the controlled end 113 of the main switch circuit 110. The secondary switch circuit 120 is used to be turned on when receiving a turn-on instruction to control the main switch circuit 110 to be turned on. It can be understood that the secondary switch circuit 120 is connected to the controlled end 113 of the main switch circuit 110, that is, the state (turned on or turned off) of the secondary switch circuit 120 can affect the operation of the main switch circuit 110. More specifically, the secondary switch circuit 120 is turned on when receiving a turn-on instruction, and the main switch circuit 110 is controlled to be turned on when the secondary switch circuit 120 is turned on. In this way, double control can be achieved, and the turn-on and turn-off of the main switch circuit 110 depend on the turn-on and turn-off of the secondary switch circuit 120, which can effectively reduce the possibility of mis-turn-on.

[0077] In the embodiment, the key to reducing the mis-conduction of the switch module 100 and improving the stability of the system lies in the difference between the switching response rates of the main switch circuit 110 and the auxiliary switch circuit 120. The switching response rate of the main switch circuit 110 must be smaller than that of the auxiliary switch circuit 120, and the difference between the two must reach a certain degree. Further explanation, when the auxiliary switch circuit 120 is mis-conducted by the pulse signal, the auxiliary switch circuit 120 will control the main switch circuit 110 to be conducted, and because the switching response rate of the main switch circuit 110 is smaller than that of the auxiliary switch circuit 120, the main switch circuit 110 is still in the process of conduction, while the auxiliary switch circuit 120 has re-entered the off state, and at this time the main switch circuit 110 is no longer conducted. In this way, when the pulse interference signal is received, the auxiliary switch circuit 120 is conducted, and the main switch circuit 110 is closed. In this way, the mis-conduction of the switch module 100 can be reduced, and the stability of the system can be improved.

[0078] Therefore, it should be noted that the difference between the switching response rate of the main switch circuit 110 and the switching response rate of the auxiliary switch circuit 120 needs to be determined according to the actual application scenario, which can be determined according to the duration of the interference signal, the mis-conduction threshold of the main switch circuit 110, and other factors. For the duration of the interference signal, if the interference voltage that may occur in the application environment has a long duration, in order to ensure that mis-conduction can be prevented even under such interference, a larger switching response rate difference needs to be set. For the mis-conduction threshold of the main switch circuit 110, if the main switch circuit 110 is very sensitive to interference and is easily activated by small interference in a short time, the auxiliary switch circuit 120 needs to react faster to ensure that it can isolate the main switch circuit 110 before it reaches the mis-conduction threshold.

[0079] It can be understood that there are many ways to achieve the switching response rate of the main switch circuit 110 and the auxiliary switch circuit 120. For hardware strategies, different switching devices can be used. The main switch circuit 110 uses a switching device with a slower switching response rate than the auxiliary switch circuit 120. The specific combination can be as follows: the main switch circuit 110 uses a relay, and the auxiliary switch circuit 120 uses a MOS tube. The relay is a mechanical switch, and its response time is usually between a few milliseconds and a few tens of milliseconds. It drives the contact to close or open through the magnetic field generated by the electromagnetic coil. The MOS tube is a high-speed semiconductor switch, and its on and off time is usually in microseconds or even nanoseconds. The combination can also be as follows: the main switch circuit 110 uses a thyristor, and the auxiliary switch circuit 120 uses an IGBT. The thyristor is a controllable silicon rectifier, and its response time is relatively slow, usually between a few milliseconds and a few tens of milliseconds. The IGBT combines the high input impedance of the MOSFET and the low on-resistance of the bipolar transistor, and its switching speed is fast, usually in microseconds.

[0080] The switch module 100 is applied to an energy storage system, such as an input end or an output end of a PCS, to ensure that the energy storage system will not be misdirected. Specifically, the switch module 100 combines the high-speed switching characteristics of the MOS tube and the stable control advantages of the relay to form a double protection, effectively resist the interference voltage in the high-voltage environment, and accurately control the on-off of the related circuit, thereby greatly improving the stability and safety of the energy storage system.

[0081] In summary, the switch module 100 provided by the present application has a main switch circuit 110 and a secondary switch circuit 120, wherein the main switch circuit 110 is used to control the conduction or cutoff of the connection path of the power supply and the load, such as the conduction or cutoff of the path between the battery and the PCS; the secondary switch circuit 120 is used to conduct after receiving a conduction signal and control the conduction of the main switch circuit 110. The key is that the switching response rate of the main switch circuit 110 is less than that of the secondary switch circuit 120, so that when the pulse interference signal is received, the main switch circuit 110 is closed after the secondary switch circuit 120 is closed, thereby reducing the misdirected conduction of the switch module 100 and improving the stability of the system.

[0082] In some embodiments, the main switch circuit 110 is a relay switch, and the secondary switch circuit 120 includes a first switch tube Q1. It can be understood that the relay is an electrical control device, which is an electrical appliance that makes a predetermined step change in the controlled quantity in the electrical output circuit when the input quantity changes to the specified requirement. The relay has a control system (also called an input loop) and a controlled system (also called an output loop), and can be applied to an automatic control circuit. It is a kind of "automatic switch" that uses small current to control large current operation. The switch tube usually refers to a semiconductor device that can control large current, such as MOSFET (metal oxide semiconductor field effect transistor) or IGBT (insulated gate bipolar transistor), or triode, etc. These devices control the flow of current through an electric field, so their switching speed is very fast, usually in microseconds or nanoseconds. Therefore, using a relay as a main switch circuit 110 and a switch tube as a secondary switch circuit 120 can directly realize the difference in switching response rate, ensuring that the switching response rate of the main switch circuit 110 is less than that of the secondary switch circuit 120.

[0083] In this embodiment, the first switch tube Q1 is a MOS tube.

[0084] In this embodiment, as Figure 2As shown, the relay switch comprises a coil 114, a first static contact 115, a second static contact 116 and a movable contact 117; an input end 1141 of the coil 114 is connected to the loop power supply, and an output end 1142 of the coil 114 is used to output the power of the loop power supply; the first static contact 115 is connected to the power input end 111, and the second static contact 116 is connected to the power output end 112; when the movable contact 117 is attracted to the first static contact 115 and the second static contact 116, the electrical connection between the power input end 111 and the power output end 112 is controlled to be open; the coil 114 is used to control the movable contact 117 to move to and adhere to the first static contact 115 and the second static contact 116 when the auxiliary switch circuit 120 is turned on. It can be understood that the coil 114 can be wound by a wire, and a magnetic field will be generated when the coil 114 is powered on, which will drive the movable contact 117 to move to the static contact. The first static contact 115 and the second static contact 116 are fixed contacts in the relay switch, which are used to form an electrical connection with the movable contact 117. The input end 1141 of the static contact is connected to the power input end 111, and the output end 1142 is connected to the power output end 112. The movable contact 117 is a movable contact in the relay switch, which is used to adhere to or separate from the static contact, thereby controlling the electrical connection between the power input end 111 and the output end 1142.

[0085] In this embodiment, the auxiliary switch circuit 120 is connected in series between the coil 114 and the ground, so that the output end 1142 of the coil 114 is connected to the ground only when the auxiliary switch circuit 120 is turned on, thereby forming a complete current loop, which not only ensures the safety of the circuit, but also enables the power-on state of the coil 114 to be accurately controlled by the auxiliary switch circuit 120. Further, when the auxiliary switch circuit 120 is turned on, the input end 1141 of the coil 114 is connected to the loop power supply, the coil 114 is powered on and generates a magnetic field, which drives the movable contact 117 to move to the static contact until the two are adhered. After the movable contact 117 adheres to the static contact, the electrical connection between the power input end 111 and the power output end 112 is established, and the current can be transmitted through this path.

[0086] In this embodiment, as Figure 4As shown, the first end of the first switch tube Q1 is connected to the output end 1142 of the coil 114, the second end of the first switch tube Q1 is grounded, and the controlled end of the first switch tube Q1 is connected to the control instruction receiving end. After receiving the control instruction, the first switch tube Q1 is turned on to turn on the auxiliary switch circuit 120. It can be understood that when the control instruction receiving end receives a control instruction that turns on the first switch tube Q1, the instruction changes the potential of the controlled end of the first switch tube Q1. Due to the change of the potential of the controlled end, the first switch tube Q1 changes from the off state to the on state. In the on state, a low-resistance path is formed between the first end and the second end of the first switch tube Q1. Since the second end of the first switch tube Q1 is grounded, the output end 1142 of the coil 114 is also grounded, forming a loop and turning on the main switch circuit 110. In this way, when the first switch tube Q1 is turned on, the output end 1142 of the coil 114 is equivalent to being grounded, so that the loop of the relay is activated and the main switch circuit 110 is turned on.

[0087] In addition, using the first switch tube Q1 as the auxiliary switch circuit 120 simplifies the circuit design and reduces the number of external components required. Compared with traditional mechanical switches, switch tubes have smaller size and higher integration, which makes the entire switch module 100 more compact and efficient. At the same time, the low-power consumption characteristics of the switch tube also reduce the overall energy consumption of the system and improve the energy utilization efficiency. In practical applications, this design not only reduces costs, but also improves the maintainability and reliability of the system. In this way, the switch module 100 can stably operate in energy storage systems and other power electronic devices in high-voltage environments, ensuring the long-term reliability and safety of the system.

[0088] It can be understood that in an embodiment, if the first switch tube Q1 is a MOS tube, the controlled end is the gate, the first end is the drain, and the second end is the source.

[0089] In some embodiments, the switch module further comprises a protection circuit connected to the main switch circuit 110 and the auxiliary switch circuit 120 for bleeding the reverse current generated by the coil 114.

[0090] It can be understood that, in accordance with Lenz's law, when the current in the coil 114 is suddenly interrupted, the inductance will try to maintain the original current flow direction, thus generating a reverse electromotive force. This reverse electromotive force can cause other elements in the circuit (such as the switching tube) to bear an excessively high voltage, and even possibly damage these elements. Therefore, the switching module contains a protection circuit connected between the main switching circuit 110 and the auxiliary switching circuit 120, which mainly functions to discharge the reverse current generated by the relay coil when power is off. In this way, when the auxiliary switching circuit 120 is turned off in response to receiving a turn-off instruction, causing the current in the relay coil to suddenly decrease or be interrupted, the protection circuit can provide a path to safely discharge this reverse current, rather than allowing it to flow freely in the circuit and possibly damage other elements. Thus, other elements in the protection circuit are protected from damage, improving the reliability and stability of the entire system.

[0091] Further, the specific implementation of the protection circuit can include using a first diode D1 to absorb or guide the reverse current, or using a resistor-capacitor (RC) network to slow down the rate of current change, thereby reducing the size of the reverse electromotive force. The selection and configuration of these elements will depend on the specific application requirements, such as the required discharge speed, the maximum reverse voltage that can be tolerated, etc. In the present embodiment, the protection circuit includes a first diode D1, the input end of the coil and the cathode of the first diode D1 are connected; the anode of the first diode D1 is connected with the auxiliary switching circuit 120.

[0092] In some embodiments, as shown in FIG. 1, the auxiliary switching circuit 120 further includes a filter circuit 121, the input end of the filter circuit 121 is connected to the control instruction receiving end, and the output end of the filter circuit 121 is connected to the controlled end 113 of the auxiliary switching circuit 120. Figure 4

[0093] ​It can be understood that the filtering circuit 121 can effectively suppress electromagnetic interference (EMI) from the external environment, which can be coupled in through the control line. In addition, if the control signal is obtained from a power supply or other high-noise source, the filtering circuit 121 can remove these noises to ensure the purity of the control signal. The filtering circuit 121 can also eliminate glitches and jitter in the control signal to ensure the stability and consistency of the signal. In one example, by using a low-pass filter, high-frequency noise can be filtered out, allowing only low-frequency signals to pass through, thereby improving the anti-interference ability of the system. In another example, if signals within a specific frequency range are required, a band-pass filter can be used to selectively pass through these frequencies, further improving the reliability and stability of the system. In addition, the filtering circuit 121 can also include a current-limiting resistor to prevent excessive current from flowing into the switch tube and protect it from damage. By filtering circuit 121, the misdirecting phenomenon caused by noise and interference in the control signal can be significantly reduced, improving the reliability of the entire system. Reducing the frequent switching of the switch tube due to misoperation helps to prolong its service life.

[0094] In the present embodiment, the filtering circuit 121 includes a first resistor R1 and a first capacitor C1, one end of the first resistor R1 is connected to the control instruction receiving end, one end of the first capacitor C1 and the controlled end of the first switch tube Q1; the other end of the first resistor R1 is connected to the other end of the first capacitor C1 and the first end of the first switch tube Q1. It can be understood that this RC filtering circuit 121 configuration can effectively filter out high-frequency noise and interference in the control signal. The first resistor R1 provides a current-limiting effect to prevent excessive current from flowing into the controlled end of the first switch tube Q1, thereby protecting the switch tube. The first capacitor C1 is used to filter out high-frequency noise and smooth the control signal to ensure that the signal delivered to the controlled end of the first switch tube Q1 is more stable. In this way, through the RC filtering circuit 121, the misdirecting phenomenon caused by glitches and jitter in the control signal can be significantly reduced, improving the anti-interference ability and stability of the system.

[0095] In some embodiments, the auxiliary switch circuit 120 further includes a current-limiting resistor R2, one end of the current-limiting resistor R2 is connected to the control instruction receiving end, and the other end of the current-limiting resistor R2 is connected to the input end of the filtering circuit 121. It can be understood that by the current-limiting resistor R2, the current flowing from the control instruction receiving end into the filtering circuit 121 can be limited to prevent excessive current from damaging the filtering circuit 121 or the first switch tube Q1.

[0096] In some embodiments, as Figure 4As shown, the connection mode of the current-limiting resistor R2 can be that one end of the current-limiting resistor R2 is connected to the control instruction receiving end, the other end of the current-limiting resistor R2 is connected to one end of the first resistor R1 and the first capacitor C1 of the filter circuit 121, and the controlled end of the first switch tube is connected.

[0097] In some embodiments, the main switch circuit 110 includes at least two relay switches, and the at least two relay switches are arranged in parallel.

[0098] It can be understood that by arranging multiple relay switches in parallel, the system can continue to work normally when one of the relay switches fails. For example, if there are two relay switches in parallel, even if one of the relay switches fails, the other relay switch can still maintain the on-off control of the circuit, thereby improving the overall reliability and fault tolerance of the system. In addition, fault detection can be achieved by monitoring the state of each relay. Once a fault is detected in a relay, the system can automatically switch to other normal relays to ensure continuous operation.

[0099] In some embodiments, the main switch circuit 110 includes at least two relay switches, and the at least two relay switches are arranged in series.

[0100] It can be understood that by arranging multiple relay switches in series, voltage value judgment can be achieved. For example, when the circuit starts to work, the first relay switch will be turned on first. In this process, the circuit closely monitors the change of the voltage value. If the detected voltage value meets the preset normal range, the circuit will continue to the next step, i.e., trying to turn on the second relay switch. However, if the voltage value detected after the first relay is turned on deviates from the normal value, the circuit will immediately stop further action for safety consideration, and the second relay switch will not be turned on.

[0101] In some embodiments, the main switch circuit 110 includes at least multiple relay switches, and the multiple relay switches are arranged in parallel and then in series, so that the beneficial effects of series and parallel arrangement can be achieved.

[0102] In some embodiments, the auxiliary switch circuit 120 includes at least two first switch tubes Q1, and the at least two first switch tubes Q1 are arranged in parallel.

[0103] It can be understood that by connecting multiple switch tubes in parallel, even if one of the switch tubes fails, the other switch tubes can still continue to work, thereby ensuring the continuous operation of the system. This redundant design improves the overall reliability and fault tolerance of the system. In addition, fault detection can be achieved by monitoring the state of each switch tube. Once a fault is detected in a switch tube, the system can automatically switch to other normal switch tubes to ensure stable transmission of control signals.

[0104] In some embodiments, the auxiliary switch circuit 120 includes at least two first switch tubes Q1 arranged in series.

[0105] It can be understood that by arranging multiple first switch tubes Q1 in series, the auxiliary switch circuit 120 forms a redundancy mechanism. In normal operating conditions, all series-connected first switch tubes Q1 work cooperatively to ensure stable operation of the circuit. However, when facing external interference or abnormal conditions, even if one of the first switch tubes Q1 is disturbed and misoperates (such as accidental conduction or shutdown), the other series-connected first switch tubes Q1 can still maintain the correct state of the circuit.

[0106] In some embodiments, in the switch module 100, each relay in each main switch circuit 110 is connected to at least one first switch tube Q1 in the auxiliary switch circuit 120. Each relay and its corresponding first switch tube Q1 form a one-to-one connection relationship, ensuring that each relay can be independently controlled, improving the flexibility and response speed of the system.

[0107] In a second aspect, as shown in Figure 5 and Figure 6 The application also provides a switch module 100, which includes a main switch circuit 110 and an auxiliary switch circuit 120; the main switch circuit 110 has a power input end 111 and a power output end 112, the power input end 111 is used to access a power supply, the power output end 112 is used to access a load, the main switch circuit 110 is used to control the on / off of the electrical connection between the power input end 111 and the power output end 112; the auxiliary switch circuit 120 is arranged in series with the main switch circuit 110, and the auxiliary switch circuit 120 is used to turn on to control the main switch circuit 110 to turn on when receiving an on command; wherein the switching response rate of the auxiliary switch circuit 120 is greater than the switching response rate of the main switch circuit 110.

[0108] It can be understood that the specific structure and Figure 5 and Figure 6 of the main switch circuit 110 and the auxiliary switch circuit 120 of the switch module as shown in Figure 4The switch module in the first embodiment and the switch module in the second embodiment are the same, but the connection modes between the main switch circuit 110 and the auxiliary switch circuit 120 are different, and the same beneficial effects can be achieved. Only when the main switch circuit 110 and the auxiliary switch circuit 120 are both turned on, the path between the power input end 111 and the power output end 112 is turned on.

[0109] In some embodiments, as shown in Figure 6 The main switch circuit 110 is a relay switch, and the auxiliary switch circuit 120 includes a second switch tube Q2. The relay switch includes a coil 114, a first static contact 115, a second static contact 116, and a moving contact 117. The input end of the coil 114 is connected to the loop power supply. The first static contact 115 is connected to the power input end 111, and the second static contact 116 is connected to the power output end 112. When the moving contact 117 is attracted to the first static contact 115 and the second static contact 116, the electrical connection between the power input end 111 and the power output end 112 is turned on. The first end of the second switch tube Q2 is connected to the power output end 112 of the second static contact 116, the second end of the second switch tube Q2 is connected to the load, and the controlled end of the second switch tube Q2 is connected to the control instruction receiving end. After the second switch tube Q2 receives the control instruction, it is turned on and the main switch circuit 110 is turned on.

[0110] In addition, in other embodiments, the second switch tube Q2 can also have the following connection mode. The second end of the second switch tube Q2 is connected to the power input end 111 of the first static contact 115, the first end of the second switch tube Q2 is connected to the power supply, and the controlled end of the second switch tube Q2 is connected to the control instruction receiving end. After the second switch tube Q2 receives the control instruction, it is turned on and the main switch circuit 110 is turned on.

[0111] It can be understood that the main switch circuit 110 and the auxiliary switch circuit 120 are arranged in series, and both of them may be misdirected under the influence of abnormal interference voltage. However, since the switching response rate of the auxiliary switch circuit 120 is significantly faster than that of the main switch circuit 110, in the case of misdirecting under the influence of interference voltage, if the auxiliary switch circuit 120 responds first and is misdirected, but because of its fast response speed, it can also be quickly turned off after the interference disappears. At this time, if the main switch circuit 110 has not been turned on or is still in the process of being turned on due to slow response speed, a time window will appear. In this time window, only the auxiliary switch circuit 110 (which is actually turned off) is in the on state, and the main switch circuit 110 fails to respond in time. This obviously cannot meet the condition that both must be turned on to achieve normal work, so the function of preventing misdirecting can be achieved, and the stability of the system can also be improved through the switch module 100.

[0112] In some embodiments, the power supply processing circuit 200 comprises the switch module 100 as described above. Figure 7 It is noted that the specific structure of the switch module 100 is described above with reference to the above embodiments. Since the power supply processing circuit 200 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments.

[0113] In modern power electronic systems, power conversion and control technology is the key to energy management and optimization. The present application provides a power supply processing circuit 200 which integrates the anti-misdirected switch module 100 described above to ensure stable operation in a high-voltage environment. It is noted that the power supply processing circuit 200 is not only suitable for energy storage systems, but also can be widely used in electric vehicle charging stations, data center UPS (uninterruptible power supply), industrial automation production lines and other occasions, providing safer and more efficient power management solutions for these critical facilities.

[0114] It can be understood that the power supply processing circuit 200 can be used to connect chips and electrical devices, the output end of the chip is connected to the power input end of the switch module 100, and the power output end of the switch module 100 is connected to the electrical device; the power supply processing circuit 200 can also be used to connect the power supply and the electrical device. Further, the power supply processing circuit 200 can also include a control chip responsible for generating corresponding control instructions according to external instructions and internal states, and the switch module 100 decides whether to turn on or off the power loop according to the control instructions from the control chip, and finally delivers the processed power to the electrical device for use. Specifically, the output end of the control chip is directly connected to the power input end of the switch module 100, and the latter supplies power to the target device through its power output end. In this way, the entire system has fast response capability and high-precision control characteristics, which can meet the needs of various complex application scenarios.

[0115] In addition, due to the use of the switch module 100 combining the relay and the switching tube double control mechanism, the power supply processing circuit 200 has shown very high anti-interference ability when facing the electromagnetic interference common in high-voltage environments. Even in the presence of strong transient pulses, by taking advantage of the response time difference between the two, misoperation can be effectively prevented, thereby greatly reducing the failure rate caused by misdirected on.

[0116] In practical applications, in order to further enhance the reliability and adaptability of the power supply processing circuit 200, multiple switch modules 100 can be used in parallel, series, or a combination of parallel and series.

[0117] In some embodiments, the power supply processing circuit 200 comprises the switch module 100 as described above.Figure 8 As shown in part C, the number of switch modules 100 is multiple, and the multiple switch modules 100 are arranged in parallel.

[0118] It can be understood that the specific connection mode of the multiple switch modules 100 arranged in parallel is as follows: the power supply processing circuit 200 further includes a parallel switch module 100, the parallel switch module 100 includes multiple switch modules 100, the power supply input ends of the multiple switch modules 100 are connected to each other as a total power supply input end, and the power supply output ends of the multiple switch modules 100 are connected to each other as a total power supply output end; the total power supply input end of the parallel switch module 100 is used to access the output end of the power supply processing circuit 200, and the total power supply output end of the parallel switch module 100 is used to access the power utilization device.

[0119] It should be noted that in high-voltage environments, electrical equipment withstands high voltage and current, which not only increases the risk of failure of individual components, but also can cause a larger range of failure. By arranging multiple independently controlled switch modules 100 in parallel, the system can achieve redundancy design, so that even if one or several switch modules 100 fail due to overload, aging or other reasons, other normally working switch modules can still continue to provide stable power output for the power utilization device, ensuring the continuous operation of the overall system, thereby improving the overall reliability of the system. In summary, the design of parallel switch modules 100 not only improves the stability of power supply, but also to some extent simplifies the maintenance work of the system and reduces the operating cost. For application occasions that require high reliability and continuous power supply, such as data centers, critical industrial facilities, and large energy storage systems, etc. have great application value.

[0120] In some embodiments, as shown in part B, Figure 8 As shown in part C, the number of switch modules 100 is multiple, and the multiple switch modules 100 are arranged in parallel.

[0121] It can be understood that the specific connection mode of the multiple switch modules 100 arranged in parallel is as follows: the power supply processing circuit 200 further includes a parallel switch module 100, the parallel switch module 100 includes multiple switch modules 100, the power supply input ends of the multiple switch modules 100 are connected to each other as a total power supply input end, and the power supply output ends of the multiple switch modules 100 are connected to each other as a total power supply output end; the total power supply input end of the parallel switch module 100 is used to access the output end of the power supply processing circuit 200, and the total power supply output end of the parallel switch module 100 is used to access the power utilization device.

[0122] Thus, by connecting multiple switch modules 100 in series, the output voltage can be effectively increased, which is suitable for applications requiring high voltage. For example, in some industrial control systems, a specific high voltage environment may be required to drive large motors or other equipment. More importantly, in the power processing circuit 200, two switch modules 100 are connected in series and controlled by independent control signals, which can achieve an effective voltage detection and safety control mechanism. This configuration not only provides the advantages of voltage increase and electrical isolation mentioned above, but also adds an additional safety layer to ensure that the next switch module 100 will only be turned on after the previous switch module 100 confirms that the voltage is normal. Further, each switch module 100 is driven by an independent control signal. The first switch module 100 (master switch) receives the first control signal, and the second switch module 100 (slave switch) receives the second control signal. A voltage detection circuit is provided at the output of the first switch module 100 to detect whether the output voltage is within the preset safety range. The output of the voltage detection circuit is connected to the control logic part of the second switch module 100, and only when the detected voltage meets the requirements, a signal will be sent to the second switch module 100 to allow it to conduct. In this way, by conducting voltage detection after the first switch module 100 is turned on, it can be ensured that the second switch module 100 will only be turned on when the voltage is stable and normal. This greatly reduces the risk of equipment damage caused by voltage fluctuations or abnormalities.

[0123] In some embodiments, as shown in Part A of Figure 8 the number of switch modules 100 is multiple, and the multiple switch modules 100 are connected in parallel and then in series.

[0124] It can be understood that the specific connection method of the multiple switch modules 100 connected in parallel and then in series is as follows: the power processing circuit 200 further includes a parallel switch module 100, the parallel switch module 100 includes multiple switch modules 100, the power input ends of the multiple switch modules 100 are connected to each other as a total power input end, and the power output ends of the multiple switch modules 100 are connected to each other as a total power output end; the number of parallel switch modules 100 is multiple, the total power output end of the last parallel switch module 100 in the multiple parallel switch modules 100 is connected to the total power input end of the next parallel switch module 100, the total power input end of the first parallel switch module 100 in the multiple parallel switch modules 100 is used to access the output end of the power processing circuit 200, and the total power output end of the last parallel switch module 100 in the multiple parallel switch modules 100 is used to access the load.

[0125] In this way, multiple parallel switch modules 100 are connected in series, combining the benefits of both series and parallel connections, and achieving the misdirected on function with fewer circuit components.

[0126] In some embodiments, as shown in FIG. 1, the power processing circuit 200 is a three-phase alternating current circuit, and each phase of the alternating current circuit includes at least one switch module 100. Figure 7 and Figure 8 As shown in FIG. 1, the power processing circuit 200 is a three-phase alternating current circuit, and each phase of the alternating current circuit includes at least one switch module 100.

[0127] It can be understood that in the power processing circuit 200, especially in the three-phase alternating current circuit, reasonable configuration of the switch module 100 can significantly improve the performance, reliability and safety of the system. The following are two common embodiments: each phase of the alternating current circuit includes at least one switch module 100. Each phase can be independently controlled, so that the system can more flexibly manage the power state of each phase. For example, in some applications, only one phase may need to be powered, while the other phases remain closed. Moreover, if a switch module 100 in a certain phase fails, it will not affect the normal operation of other phases. This isolation mechanism helps to improve the overall reliability of the system.

[0128] In some embodiments, each phase of the alternating current circuit includes multiple switch modules 100, and the multiple switch modules 100 are connected in parallel.

[0129] It can be understood that the specific connection method of each phase of the alternating current circuit including multiple switch modules 100 connected in parallel is as follows: the three-phase alternating current circuit includes parallel switch modules 100, the parallel switch modules 100 include multiple switch modules 100, the power input ends of the multiple switch modules 100 are connected to each other as a total power input end, and the power output ends of the multiple switch modules 100 are connected to each other as a total power output end; at least one output end in the three-phase alternating current circuit is connected to the total power input end of the parallel switch modules 100.

[0130] In some embodiments, each phase of the alternating current circuit includes multiple switch modules 100, and the multiple switch modules 100 are connected in series.

[0131] It can be understood that the specific connection mode of the plurality of switch modules 100 connected in series in each phase of the alternating current circuit is as follows: the three-phase alternating current circuit includes a series switch module 100, the series switch module 100 includes a plurality of the switch modules 100, the power output end of the last one of the plurality of the switch modules 100 is connected to the power input end of the next one of the plurality of the switch modules 100, the power input end of the first one of the plurality of the switch modules 100 is the total power input end of the series switch module 100, and the power output end of the last one of the plurality of the switch modules 100 is the total power output end of the series switch module 100; at least one output end in the three-phase alternating current circuit is connected to the total power input end of the series switch module 100.

[0132] In some embodiments, the plurality of switch modules 100 in each phase of the alternating current circuit are connected in series and then in parallel.

[0133] It can be understood that the specific connection mode of the plurality of switch modules 100 connected in parallel and then in series in each phase of the alternating current circuit is as follows: the three-phase alternating current circuit energy storage system further includes a parallel switch module 100, the parallel switch module 100 includes a plurality of the switch modules 100, the power input ends of the plurality of the switch modules 100 are connected to each other as a first total power input end, and the power output ends of the plurality of the switch modules 100 are connected to each other as a first total power output end; the number of the parallel switch modules 100 is a plurality, the first total power output end of the last one of the plurality of the parallel switch modules 100 is connected to the first total power input end of the next one of the plurality of the parallel switch modules 100 to form a plurality of switch modules 100, the first total power input end of the first one of the plurality of the parallel switch modules 100 is a second total power input end of the plurality of switch modules 100, and the first total power output end of the last one of the plurality of the parallel switch modules 100 is a second total power output end of the plurality of switch modules 100; at least one output end in the three-phase alternating current circuit is connected to the second total power input end of the plurality of switch modules 100.

[0134] It can be understood that the beneficial effects of the series-parallel switch modules 100 in the three-phase alternating current circuit are the same as those described above, and will not be repeated here.

[0135] In the present embodiment, as Figure 8As shown, the AC circuit of each phase includes two first switch modules, and the two first switch modules are connected in series; and each first switch module includes two switch modules 100 connected in parallel. It can be understood that the first switch module in the embodiment is actually two switch modules 100 connected in parallel. By using four switch modules, efficient circuit control and fault tolerance can be achieved, and the use of only four switch modules also avoids the increase of design cost due to the complexity of the circuit.

[0136] Overall, the power processing circuit 200 realizes accurate management and efficient use of electric energy by integrating the anti-misdirected switch module 100. Whether it is a single switch module or a plurality of switch modules connected in parallel, series or series after parallel, it shows its powerful functionality and adaptability. Especially in a three-phase AC circuit, the presence of the switch module 100 further improves the performance, reliability and safety of the system using the three-phase AC circuit.

[0137] In a fourth aspect, as Figure 9 As shown, the present application also provides an energy storage system 300, which includes a PCS converter 310, a battery 320 and a power processing circuit 200 as described in any of the above embodiments.

[0138] In the embodiment, the PCS converter 310 is a key device connecting the battery 320 and the power grid, responsible for converting the DC power of the battery 320 into AC power, or converting the AC power of the power grid into DC power, to realize bidirectional energy flow. The PCS converter 310 usually includes a DC / AC bidirectional converter, a control unit and other components, and can accurately regulate power according to background instructions to ensure efficient and safe charging and discharging of the battery 320.

[0139] In the embodiment, the battery 320 is the core part of the energy storage system 300, used to store and release electric energy when needed. The battery 320 type can include lithium ion battery, lead-acid battery, sodium-sulfur battery, etc.

[0140] In the embodiment, the power processing circuit 200 is an important innovation point of the energy storage system 300, which adopts the technical solutions of all the above embodiments and includes the beneficial effects of all the above embodiments. The power processing circuit 200 has multiple switch module configurations (parallel, series or series after parallel) and is intelligently managed by a control chip. The input end of the power processing circuit 200 can be connected to the battery 320, and the output end can be connected to the input end of the PCS converter 310, so that the battery 320 and the PCS converter 310 are prevented from being misdirected, and the electric energy is efficiently and reliably managed during transmission.

[0141] In some embodiments, asFigure 9 As shown, the input end of the power processing circuit 200 is connected with the battery 320, and the output end of the power processing circuit 200 is connected with the input end of the PCS converter 310; in another embodiment, the input end of the power processing circuit 200 is connected with the output end of the PCS converter 310, and the output end of the power processing circuit 200 is used for connecting with the power utilization device; in still another embodiment, the number of the power processing circuits 200 is multiple, at least one power processing circuit 200 is arranged between the battery 320 and the PCS converter 310, and at least one power processing circuit 200 is arranged between the PCS converter 310 and the power utilization device. In this way, the power processing circuit 200 can be efficiently utilized, the misdirecting-through situation can be avoided, the stability of the system can be improved, the PCS can be protected when applied in the energy storage system, and the stability of the energy storage system can be improved.

[0142] The above merely describes exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application and the drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A switch module, characterized in that The switch module comprises: a main switch circuit having a power input end and a power output end, the power input end being used for accessing a power supply, the power output end being used for accessing a load, and the main switch circuit being used for controlling the electrical connection between the power input end and the power output end to be turned on or turned off; a sub-switch circuit connected to the controlled end of the main switch circuit, the sub-switch circuit being used for being turned on in response to a received turn-on instruction to control the main switch circuit to be turned on; the switching response rate of the sub-switch circuit is greater than the switching response rate of the main switch circuit.

2. The switch module of claim 1, wherein, The main switch circuit is a relay switch, and the sub-switch circuit comprises a first switch tube; the relay switch comprises: a coil; a first static contact, a second static contact and a moving contact, the first static contact being used for accessing the power input end, the second static contact being used for accessing the power output end, and the moving contact being used for controlling the electrical connection between the power input end and the power output end to be turned on when the moving contact is attracted to the first static contact and the second static contact; the input end of the coil accesses a loop power supply, and the sub-switch circuit is arranged in series between the output end of the coil and the ground.

3. The switch module of claim 2, wherein, The switch module further comprises a protection circuit connected to the main switch circuit and the sub-switch circuit respectively, and used for bleeding the reverse current generated by the coil.

4. The switch module of claim 3, wherein, The protection circuit comprises a first diode, the input end of the coil is connected to the cathode of the first diode, and the anode of the first diode is connected to the sub-switch circuit.

5. A switch module as claimed in any one of claims 2 to 4, characterised in that, The first end of the first switch tube is connected to the output end of the coil, the second end of the first switch tube is grounded, the controlled end of the first switch tube is connected to a control instruction receiving end, the first switch tube is turned on after receiving the control instruction, and the main switch circuit is turned on.

6. The switch module of claim 5, wherein, The sub-switch circuit further comprises a filter circuit, the input end of the filter circuit is connected to the control instruction receiving end, and the output end of the filter circuit is connected to the controlled end of the sub-switch circuit.

7. The switch module of claim 6, wherein, The filter circuit comprises a first resistor and a first capacitor, one end of the first resistor is connected to the control instruction receiving end, one end of the first capacitor and the controlled end of the first switch tube, the other end of the first resistor is connected to the other end of the first capacitor and the first end of the first switch tube.

8. The switch module of claim 5, wherein, The sub-switch circuit further comprises a current-limiting resistor, one end of the current-limiting resistor is connected to the control instruction receiving end, and the other end of the current-limiting resistor is connected to the controlled end of the first switch tube.

9. The switch module of claim 1, wherein, The main switch circuit comprises at least two relay switches, and the at least two relay switches are arranged in series and / or in parallel.

10. The switch module of claim 1, wherein, The sub-switch circuit comprises at least two first switch tubes, and the at least two first switch tubes are arranged in series and / or in parallel.

11. A switch module, characterized by The switch module comprises: a main switch circuit having a power input end and a power output end, the power input end being used for accessing a power supply, the power output end being used for accessing a load, and the main switch circuit being used for controlling the electrical connection between the power input end and the power output end to be turned on or turned off; A sub-switch circuit is arranged in series with the main switch circuit, and is used to be turned on to control the main switch circuit to be closed when receiving an on command; wherein, a switching response rate of the sub-switch circuit is greater than a switching response rate of the main switch circuit.

12. The switch module of claim 10, wherein, The main switch circuit is a relay switch, and the sub-switch circuit comprises a second switch tube. The relay switch comprises: A coil, an input end of the coil being used to be connected to a loop power supply; A first static contact, a second static contact and a moving contact, the first static contact being used to be connected to the power supply input end, the second static contact being used to be connected to a power supply output end, and the moving contact being used to control an electrical connection between the power supply input end and the power supply output end to be turned on when the moving contact is attracted to the first static contact and the second static contact; A first end of the second switch tube is connected to the power supply output end of the second static contact, a second end of the second switch tube is connected to a load, and a controlled end of the second switch tube is connected to a control instruction receiving end, the second switch tube being turned on after receiving a control instruction, and the main switch circuit being turned on.

13. A power supply processing circuit, characterized by comprising: The power supply processing circuit comprises the switch module as claimed in any one of claims 1 to 10.

14. The power supply processing circuit of claim 13, wherein, The number of the switch modules is multiple, and the multiple switch modules are arranged in series and / or in parallel.

15. The power supply processing circuit of claim 13, wherein, The power supply processing circuit is a three-phase alternating current circuit, and each phase of the alternating current circuit comprises at least one switch module.

16. The power supply processing circuit of claim 15, wherein, Each phase of the alternating current circuit comprises multiple switch modules, and the multiple switch modules are arranged in series and / or in parallel.

17. The power supply processing circuit of claim 15, wherein, Each phase of the alternating current circuit comprises two first switch modules, and the two first switch modules are arranged in series. The first switch module comprises two switch modules arranged in parallel.

18. An energy storage system characterized by, The energy storage system comprises: A PCS converter; A battery; and The power supply processing circuit as claimed in any one of claims 13 to 17; an input end of the power supply processing circuit is connected to the battery, an output end of the power supply processing circuit is connected to an input end of the PCS converter, and / or an input end of the power supply processing circuit is connected to an output end of the PCS converter, and an output end of the power supply processing circuit is used to be connected to an electrical device.

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