Train hibernation wake-up power supply system, control method and train

Abstract

The application provides a train hibernation wake-up power supply system, a control method and a train, and relates to the technical field of train control. The train hibernation wake-up power supply system comprises a storage battery power supply module, which comprises a storage battery, a on-off circuit, a battery management unit and a first control circuit. The on-off circuit is arranged at both ends of the storage battery in series with a train low-voltage load. The battery management unit is connected to both ends of the storage battery through the first control circuit. The battery management unit is connected with the on-off circuit and is used for controlling the on-off circuit to be closed after power-on or acquiring a hibernation signal and controlling the on-off circuit to be disconnected according to the hibernation signal. The application guarantees the normal implementation of functions such as train hibernation, wake-up and battery disconnection, greatly improves the standby time of the storage battery, and is conducive to cost reduction.

Description

Technical Field

[0001] This invention relates to the field of train control technology, and more specifically, to a train sleep-wake-up power supply system, control method, and train. Background Technology

[0002] Rail transit vehicles are typically equipped with auxiliary batteries for use in train hibernation and emergency power supply during emergency situations.

[0003] In related technologies, the output of the battery needs to be protected and controlled by a battery management system. Therefore, this is often achieved by setting up a battery management system and a contactor. However, in order to ensure the normal operation of the train's wake-up and hibernation control function, the battery management system needs to be connected to the battery bus as a permanent load. As a result, the battery may become undervoltage due to the power consumption of the battery management system, which may cause the train to fail to wake up due to undervoltage, affecting the train's stopping time in the depot. Summary of the Invention

[0004] The problem this invention aims to solve is that, while ensuring the train wake-up and hibernation functions and the battery protection function, the battery management system is prone to causing battery undervoltage, which affects the train wake-up process.

[0005] To address the aforementioned problems, in a first aspect, the present invention provides a train sleep / wake-up power supply system for suspending and waking up low-voltage loads on a train, the train sleep / wake-up power supply system comprising:

[0006] A battery power supply module includes a battery, a switching circuit, a battery management unit, and a first control circuit. The switching circuit is connected in series with the low-voltage load of the train and is located at both ends of the battery. The battery management unit is connected to both ends of the battery through the first control circuit. The battery management unit is connected to the switching circuit and is used to: control the switching circuit to close after power-on, or acquire a sleep signal and control the switching circuit to open according to the sleep signal.

[0007] The main control module, connected to the first control circuit, is used for:

[0008] In the train wake-up state, the sleep signal is acquired, and after the battery management unit disconnects the switching circuit according to the sleep signal, the first control circuit is controlled to disconnect so that the battery management unit is de-energized. This includes: in the train wake-up state, acquiring the sleep signal and controlling the first control circuit to de-energize so that the first control circuit disconnects after a second duration; wherein, the battery management unit acquires the sleep signal and disconnects the switching circuit after a first duration, the second duration is longer than the first duration, and the time difference between the main control module and the battery management unit acquiring the sleep signal is less than the difference between the second duration and the first duration;

[0009] When the train is in sleep mode, it receives a wake-up signal and controls the first control circuit to close, so that the battery management unit controls the on / off circuit to close after being powered on.

[0010] Optionally, the switching circuit includes a second switch, which is connected in series with the low-voltage load of the train and positioned across the two ends of the battery. The battery management unit is connected to the second switch. The main control module is configured to: acquire a wake-up signal and control the first control circuit to close, so that the battery management unit is powered on and, after self-testing, controls the second switch to close, so that the low-voltage load of the train is powered on and the train is woken up; and, after the battery management unit disconnects the second switch according to the hibernation signal, controls the first control circuit to disconnect, so that the battery management unit is de-energized.

[0011] Optionally, the first control circuit includes a first switch, which is connected in series with the battery management unit at both ends of the battery. The main control module is connected to the first switch and is used to: control the first switch to close so that the battery management unit is powered on; and control the first switch to open so that the battery management unit is powered off.

[0012] Optionally, the first switch is a time-delay switch, and the main control module is used for:

[0013] When the train is awake, the sleep signal is acquired, and the first switch is de-energized so that the first switch opens after a second period of time.

[0014] Specifically, the battery management unit acquires the sleep signal and disconnects the second switch after a first duration, where the second duration is longer than the first duration, and the time difference between the main control module and the battery management unit acquiring the sleep signal is less than the difference between the second duration and the first duration.

[0015] Optionally, the battery power supply module further includes a charging unit, which is connected in parallel with the low-voltage load of the train. The main control module is used to disable the sleep signal when the charging unit is detected to be working.

[0016] Optionally, the battery power supply module further includes a first diode and a second diode. The first diode is connected in series between the second switch and the low-voltage load of the train. The anode of the first diode is close to the second switch, and the cathode of the first diode is close to the low-voltage load of the train. The anode of the second diode is connected to the end of the second switch away from the battery, and the cathode of the second diode is connected to the end of the first switch away from the battery management unit.

[0017] Optionally, the main control module includes a main control circuit connected to both ends of the permanent busbar. The main control circuit includes a logic unit and a third switch connected in series. The third switch is used to control the opening and closing of the first switch. The logic unit is used to: acquire the wake-up signal and turn on the main control circuit so that the first switch closes after the third switch is energized; acquire the sleep signal and, after the on / off circuit is disconnected, turn off the main control circuit so that the first switch opens after the third switch is de-energized.

[0018] Optionally, the first switch is a contactor, which includes a first coil and a first contact switch. The third switch is a relay, which includes a second coil and a second contact switch. The second coil is connected in series with the logic unit, and the second contact switch is connected in series with the first coil to form a second control circuit. The two ends of the second control circuit are connected to the two ends of a permanent bus. The first contact switch is connected in series with the battery management unit. The logic unit is used to: acquire the wake-up signal, turn on the main control circuit so that the second coil is energized and controls the second contact switch to close, so that the first coil is energized and closes the first contact switch; acquire the sleep signal, and after the on / off circuit is disconnected, cut off the main control circuit so that the second coil is de-energized and disconnects the second contact switch, so that the first coil is de-energized and disconnects the first contact switch.

[0019] The train hibernation and wake-up power supply system provided by this invention achieves efficient power management through the coordinated control of the battery power supply module and the main control module. The battery simultaneously supplies power to the first control circuit, the circuit containing the battery management unit, and the main power supply circuit (formed by the switching circuit and the train's low-voltage load). During the wake-up process, after receiving the wake-up signal, the main control module first closes the first control circuit to power on the battery management unit. Then, the battery management unit controls the switching circuit to close, supplying power to the train's low-voltage load to complete the train wake-up. During hibernation, the comparison between the first and second durations and the corresponding control logic ensure that the battery management unit completes the power-off operation before the first control circuit, forming a safe timing sequence of first disconnecting the battery main circuit and then disconnecting the first control circuit containing the battery management unit. This ensures that the hibernation process is not affected and that the battery management unit is powered off after completing its work, avoiding unnecessary power consumption and voltage drop in the battery. Through hardware settings and software hierarchical control, this invention can cut off the power supply circuit of the battery management unit after the vehicle goes into hibernation without affecting the normal wake-up and hibernation function. This ensures that the normal wake-up and hibernation function of the train is realized while greatly improving the standby time of the battery.

[0020] In a second aspect, the present invention also provides a train sleep-wake power supply control method, based on the train sleep-wake power supply system as described in any of the preceding claims, comprising:

[0021] In the train wake-up state, a sleep signal is acquired, and after the battery management unit disconnects the switching circuit according to the sleep signal, the first control circuit is controlled to disconnect, so that the battery management unit is de-energized. This includes: in the train wake-up state, acquiring a sleep signal and controlling the first control circuit to de-energize, so that the first control circuit disconnects after a second duration; wherein, the battery management unit acquires the sleep signal and disconnects the switching circuit after a first duration, the second duration is longer than the first duration, and the time difference between the main control module and the battery management unit acquiring the sleep signal is less than the difference between the second duration and the first duration;

[0022] When the train is in sleep mode, it receives a wake-up signal and controls the first control circuit to close, so that the battery management unit controls the on / off circuit to close after being powered on.

[0023] Thirdly, the present invention provides a train including the train sleep-wake power supply system described above.

[0024] The train hibernation and wake-up power supply control method and train provided by this invention have the same beneficial effects as the train hibernation and wake-up power supply system compared to the prior art, and will not be repeated here. Attached Figure Description

[0025] Figure 1 A schematic diagram of the main control module in an embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram of the battery power supply module in an embodiment of the present invention is shown;

[0027] Figure 3 A flowchart of the train hibernation wake-up power supply control method in an embodiment of the present invention is shown.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Auxiliary inverter box; 2. Battery box; 3. Permanent load; 4. Train low-voltage load. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] It should be noted that relational terms such as "first" and "second" in this invention are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or illustrative implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0033] Reference Figure 1 and Figure 2 As shown in the figure, this embodiment of the invention proposes a train sleep-wake-up power supply system for suspending and waking up the low-voltage load 4 of a train. The train sleep-wake-up power supply system includes:

[0034] The battery power supply module includes a battery BAT, a switching circuit, and a first control circuit. The switching circuit is connected in series with the low-voltage load 4 of the train and is located across the two ends of the battery BAT. The first control circuit is connected across the two ends of the battery BAT and includes a battery management unit (BMS). The BMS is connected to the switching circuit and is used to: control the switching circuit to close after power-on, or acquire a sleep signal and control the switching circuit to open according to the sleep signal.

[0035] The main control module, connected to the first control circuit, is used for:

[0036] In the train wake-up state, the sleep signal is acquired, and after the battery management unit (BMS) disconnects the switching circuit according to the sleep signal, the first control circuit is controlled to disconnect, so that the battery management unit (BMS) is de-energized. This includes: in the train wake-up state, acquiring the sleep signal and controlling the first control circuit to disconnect, so that the first control circuit disconnects after a second duration; the battery management unit (BMS) acquires the sleep signal and disconnects the switching circuit after a first duration, the second duration is longer than the first duration, and the time difference between the main control module and the battery management unit (BMS) acquiring the sleep signal is less than the difference between the second duration and the first duration.

[0037] When the train is in sleep mode, it receives a wake-up signal and controls the first control circuit to close, so that the battery management unit (BMS) controls the on / off circuit to close after power-on.

[0038] Specifically, the battery BAT serves as the power source for the train in the wake-up state, that is, it supplies power to the train's low-voltage load 4. The on / off circuit and the train's low-voltage load 4 are connected in series to form the main power supply circuit. This main power supply circuit is responsible for supplying power to the train's low-voltage load 4. The "on / off circuit" is essentially a controlled switch. The first control circuit is directly connected to the battery BAT, which means that it can draw power from the battery BAT at any time. Its core is the battery management unit (BMS), which is responsible for monitoring the battery status and executing relevant logic. The battery BAT generally uses lead-acid or nickel-cadmium batteries, but lithium batteries are preferred. In this case, the battery management unit (BMS) is needed to protect the battery output. Control is a key aspect of which lies in controlling the on / off state of the "on / off circuit." Thus, the battery (BAT) simultaneously supplies power to two parallel circuits: one is the first control circuit that powers the battery management unit (BMS), and the other is the main power supply circuit controlled by the BMS, which connects the on / off circuit and the train's low-voltage load 4 in series. Furthermore, in sleep mode, both the first control circuit and the on / off circuit are disconnected. In related technologies, the battery box 2 requires an additional output contactor for protection control, and a contactor is also needed for train sleep wake-up. In this solution, the on / off circuit functions as both the battery output contactor and the train sleep wake-up function, which helps optimize costs.

[0039] Furthermore, during the hibernation process, the first control circuit is configured with power-off delayed disconnection logic. The first control circuit can be a time-delay switch. Specifically, after receiving the hibernation signal via hard-wired data or other means, the battery management unit (BMS) starts a first-duration timer. After the timer expires, the on / off circuit is disconnected. Simultaneously, due to control by the main control module, the first control circuit is powered off after the main control module receives the hibernation signal, and a second-duration delayed disconnection begins. Since the second duration is longer than the first duration, and the time difference between the main control module and the battery management unit (BMS) receiving signals is extremely small (in practice, they receive the hibernation signal almost simultaneously), this ensures that the battery management unit (BMS) completes the power-off operation before the first control circuit. This forms a safe timing sequence of disconnecting the battery main circuit first and then disconnecting the first control circuit where the battery management unit (BMS) is located. This ensures that the hibernation process is not affected and that the battery management unit (BMS) is powered off after completing its work, avoiding unnecessary power consumption and voltage drop in the battery battery (BAT) (without complex disconnection logic, the voltage of the battery battery (BAT) can be maintained at a relatively high level).

[0040] For the Battery Management Unit (BMS), which directly manages the power supply for the train's low-voltage load 4, the following actions are performed: When the BMS receives power ("power-on"), it automatically performs an action, namely closing the on / off circuit. This connects the power supply to the train's low-voltage load 4, thus waking the train. When the BMS receives a sleep signal from the TCMS or the on / off circuit, it performs the opposite action, controlling the on / off circuit to open, thus cutting off the power supply to the train's low-voltage load 4, and the train enters sleep mode. Generally, the voltage of the train's battery (BAT) is 110V. When the BMS (generally referring to the main control unit (BCU)) is connected, since commercially available BMSs typically use 12V or 24V power supply, the BMS of this invention needs to perform internal voltage reduction processing.

[0041] As the control core, the main control module works in conjunction with the battery management unit (BMS). During the wake-up process, the train is in a dormant state, and both the first control circuit and the on / off circuit are disconnected. The battery management unit (BMS) and the train's low-voltage load 4 are both in a de-energized state. The main control module first receives a "wake-up signal" and then closes the first control circuit. This action is equivalent to "plugging in" the Battery Management Unit (BMS). The BMS then begins operation. After power-on, it typically needs to perform a self-test and display "READY" before automatically controlling the on / off circuit to close, thus supplying power to the "Train Low-Voltage Load 4" device and waking the train. In the hibernation process, the train is initially in a awake state, all circuits are connected, the main control module receives a "hibernation signal," and the BMS also receives a hibernation signal. Based on the hibernation signal, the BMS disconnects the on / off circuit, de-energizing the train's low-voltage load 4 and putting the train into hibernation. Subsequently, through the BMS's execution time or its cut-off feedback signal, after confirming the disconnection of the on / off circuit, the main control module disconnects the first control circuit. This action is equivalent to de-energizing the BMS, ensuring that the BMS itself is completely de-energized in hibernation mode, maximizing the conservation of battery power.

[0042] In practical application, this embodiment achieves efficient power management through the coordinated control of the battery power supply module and the main control module. The battery (BAT) simultaneously supplies power to the first control circuit, the circuit containing the battery management unit (BMS), and the main power supply circuit (formed by the on / off circuit and the train's low-voltage load 4). During the wake-up process, after receiving the wake-up signal, the main control module first closes the first control circuit to power on the battery management unit (BMS). Then, the battery management unit (BMS) controls the on / off circuit to close, supplying power to the train's low-voltage load 4 to complete the train wake-up. During the sleep process, the comparison between the first and second durations and the corresponding control logic ensure that the battery management unit (BMS) completes the power-off operation before the first control circuit, forming a first-to-second power-off mechanism. The invention employs a safety timing sequence that disconnects the battery main circuit and then the first control circuit containing the Battery Management Unit (BMS), ensuring that the hibernation process is not affected and that the BMS is powered off after completing its work. This avoids unnecessary power consumption and voltage drop in the battery attack unit (BAT). Through hardware settings and hierarchical software control, the invention can cut off the power supply circuit of the BMS after the vehicle enters hibernation without affecting the normal wake-up hibernation function. This significantly improves the standby time of the battery attack unit (BAT) while ensuring the normal wake-up hibernation function of the train. At the same time, while ensuring that the battery has a main output disconnect function, it reduces the number of main power supply contactors in the train to a certain extent, which helps to reduce costs.

[0043] like Figure 1 and Figure 2As shown, in an optional embodiment of the present invention, the on / off circuit includes a second switch K2, which is connected in series with the low-voltage load 4 of the train and positioned across the two ends of the battery BAT. The battery management unit (BMS) is connected to the second switch K2. The main control module is used to: acquire a wake-up signal and control the first control circuit to close, so that the battery management unit (BMS) is powered on and, after self-testing, controls the second switch K2 to close, so that the low-voltage load 4 of the train is powered on and the train is woken up; after the battery management unit (BMS) disconnects the second switch K2 according to the hibernation signal, controls the first control circuit to disconnect, so that the battery management unit (BMS) is de-energized.

[0044] Specifically, for the battery management unit (BMS), the BMS is connected to the second switch K2 and is used to: control the second switch K2 to close, so that the low-voltage load 4 of the train is powered on to wake up the train; and control the second switch K2 to open, so that the low-voltage load 4 of the train is de-powered to put the train into hibernation.

[0045] The second switch K2 is connected in series with the train's low-voltage load 4. The second switch K2 is the main contactor (used as a contactor for the battery, and also serves as the main contactor for vehicle wake-up and sleep functions of the train). The second switch K2, the battery BAT, and the battery management unit BMS can be installed in the battery box 2 for protection. It can be operated or replaced in a modular manner. The second switch K2 has both the function of a battery output contactor and the function of train sleep wake-up, which helps to reduce costs.

[0046] In addition, fuses FU can be installed at the positive and negative terminals of the battery BAT, and fuses FU can also be installed on the first control circuit to prevent overcurrent.

[0047] During the wake-up phase, the main control module, acting as the command initiator, receives a wake-up signal (such as driver operation, remote command, or timing signal) and first controls the first switch K1 in the first control circuit to close. This operation establishes a power supply circuit from the battery (BAT) to the battery management unit (BMS), enabling the BMS to power on and start. After startup, the BMS immediately executes a self-test program to diagnose its own status and related systems. After the self-test is successfully completed, the Battery Management Unit (BMS), acting as the actuator, controls the second switch K2 to close, thereby connecting the main power supply circuit of the train's low-voltage load 4 system (the train's core control system). The train's low-voltage load 4 is then powered on and started, completing the train's overall wake-up process. Since the Battery Management Unit (BMS) is connected to the battery (BAT), the process strictly follows the procedure of first closing the first switch K1 to power on the BMS, and then the BMS, acting as the actuator, controls the second switch K2 to close, thereby connecting the train's low-voltage load 4. Thus, after the train's low-voltage load 4 is powered on and started, the BMS can continuously monitor the voltage and current of the battery (BAT) to ensure the safe discharge of the battery (BAT).

[0048] During the sleep phase, power-off operations are performed in reverse sequence. When the Battery Management Unit (BMS) receives the sleep signal, as the initial response, it first disconnects the second switch K2, cutting off the power supply to the train's low-voltage load system 4, causing the train's core control system to enter a power-off sleep state. Subsequently, the main control module, acting as the final execution unit, disconnects the first switch K1 in the first control circuit, completely cutting off the power supply circuit of the Battery Management Unit (BMS), and the BMS enters a power-off sleep state.

[0049] The above not only ensures that the critical train's low-voltage load 4 is powered on and operated under stable monitoring, but also reduces unnecessary power consumption by coordinating hardware circuits and timing to ultimately cut off the power supply to the battery management unit (BMS) after it has finished working, while ensuring that the wake-up and hibernation processes are completed.

[0050] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, the first control circuit includes a first switch K1. The first switch K1 and the battery management unit (BMS) are connected in series and disposed at both ends of the battery BAT. The main control module is connected to the first switch K1 and is used to: control the first switch K1 to close so that the battery management unit (BMS) is powered on; and control the first switch K1 to open so that the battery management unit (BMS) is powered off.

[0051] Specifically, the first switch K1 can be an electronic switch controlled by voltage (rather than current), where the GPIO pin of the main control module outputs a weak control voltage (such as 3.3V or 5V) to the gate of the MOSFET, thereby controlling the opening and closing of the large current path between its drain and source; or it can be a relay, which uses the small current output by the main control module to drive the electromagnet inside the relay, thereby attracting or disconnecting a mechanical contact to control a large current loop.

[0052] In this circuit, the first switch K1 is connected in series with the battery management unit (BMS) and then to the positive and negative terminals of the battery (BAT), forming a complete power supply loop. The main control module precisely controls the opening and closing of the first switch K1 through control signals (sleep signal or wake-up signal): when the train needs to be woken up, the battery management function is activated, and the main control module closes the first switch K1, allowing the battery (BAT) to supply power to the BMS normally, enabling it to enter working state and wake up the train; when the train enters sleep mode, the main control module opens the first switch K1, completely cutting off the power supply loop to the BMS, causing it to stop working immediately and avoiding unnecessary power consumption. This design achieves refined power consumption management and effectively extends the battery (BAT)'s operating time.

[0053] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, the first switch K1 is a time-delay switch, and the main control module is used for:

[0054] When the train is awake, the sleep signal is acquired, and the first switch K1 is de-energized so that the first switch K1 is disconnected after a second period of time.

[0055] Specifically, the battery management unit (BMS) acquires the sleep signal and disconnects the second switch K2 after a first duration, where the second duration is longer than the first duration. The time difference between the main control module and the battery management unit (BMS) acquiring the sleep signal is less than the difference between the second duration and the first duration.

[0056] Specifically, the Battery Management Unit (BMS) can also connect to the contacts of the hibernation relay (third switch K3) via a hard wire to obtain hard-wire data or a data stream sent by the TCMS (Train Control and Management System), indicating the need for hibernation. When the train enters the hibernation process, the hibernation signal is simultaneously sent to the BMS and the main control module via hard wire or data stream. After receiving the signal, the BMS starts a first-duration (≥0s) timer, and after the timer expires, it disconnects the second switch K2. At the same time, the first switch K1, controlled by the main control module, starts a second-duration delay disconnection after receiving the hibernation signal. Since the second duration is longer than the first duration, and the time difference between the signals received by the two modules is extremely small (in practice, they receive the hibernation signal almost simultaneously), this ensures that the BMS completes the power-off operation before the first switch K1, forming a safe timing sequence of disconnecting the main battery circuit first and then disconnecting the first control circuit where the BMS is located. This ensures that the hibernation process is not affected and that the BMS is powered off after completing its work, reducing unnecessary power consumption.

[0057] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, the battery power supply module further includes a charging unit, which is connected in parallel with the train low-voltage load 4. The main control module is used to: disable the sleep signal when the charging unit is detected to be working.

[0058] Specifically, the connection circuit between the charger DC and the battery BAT is as follows: Figure 2 As shown, when the high-voltage charger DC is working, it outputs two power supplies: one to power the train's low-voltage load 4, and the other to charge the battery BAT. Therefore, charging will not affect the operation of the train's low-voltage load 4, and it can remain in the awake state. It should be noted that the hibernation state is entered when there is no high voltage (the charger DC is not working).

[0059] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, the battery power supply module further includes a first diode D1 and a second diode D2. The first diode D1 is connected in series between the second switch K2 and the train low-voltage load 4. The anode of the first diode D1 is close to the second switch K2, and the cathode of the first diode D1 is close to the train low-voltage load 4. The anode of the second diode D2 is connected to the end of the second switch K2 away from the battery BAT, and the cathode of the second diode D2 is connected to the end of the first switch K1 away from the battery management unit BMS. The charger DC and the first diode D1 are disposed in the auxiliary inverter box 1.

[0060] Specifically, for the first diode D1, since each train's low-voltage load 4 may be connected to multiple battery power supply modules in parallel at the same time, the first diode D1 is set to prevent the charger DC of other battery power supply modules from charging the battery BAT of this battery power supply module, thus avoiding mixed charging.

[0061] For the second diode D2, since the permanent load 3 is always connected to both ends of the battery BAT, when the battery BAT has a low charge, the charging strategy of the charger DC is executed. At this time, in order to ensure the operation of the permanent load 3 and protect the battery BAT, the circuit from the charger DC to the permanent load 3 and the battery management unit BMS is connected through the setting of the second diode D2. The power supply of the permanent load 3 is still guaranteed, the battery management unit BMS can be woken up, and the battery BAT is not damaged (due to over-discharge).

[0062] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, the main control module includes a main control circuit connected to both ends (VIN+ and VIN-) of the permanent bus. The main control circuit includes a logic unit LU connected in series and a third switch K3. The third switch K3 is used to control the opening and closing of the first switch K1. The logic unit LU is used to: acquire the wake-up signal and turn on the main control circuit so that the first switch K1 closes after the third switch K3 is energized; acquire the sleep signal and, after the on / off circuit is disconnected, cut off the main control circuit so that the first switch K1 opens after the third switch K3 is de-energized. The permanent bus can draw power from the same battery BAT or another battery BAT as the battery management unit BMS.

[0063] Specifically, the logic unit LU uses active devices; it has an internal electronic switch (such as a transistor or MOSFET) controlled by its logic (such as a TCMS control network); when it needs to "wake up": according to the wake-up command, its internal electronic switch is closed, the main control circuit is closed, and the third switch K3 is energized and engaged; when it needs to "sleep": according to the sleep conditions, its internal electronic switch is opened, the main control circuit is closed, the third switch K3 is de-energized and released, and the opening or closing of the third switch K3 causes the first switch K1 to be switched on or off.

[0064] In one possible embodiment, the third switch K3 can be placed on the drive power path of the first switch K1 or in the enable / gate level control loop of the first switch K1 (e.g., the third switch K3 is designed to cut off the drive voltage supplied to the gate / coil of the first switch K1). When the third switch K3 is open, the drive power of the first switch K1 is cut off or its drive terminal is pulled to the disable level (disabling can be ensured by pull-up / pull-down resistors, drain-gate resistors, etc.), so that the power switching element of the first switch K1 (such as the gate drive of a relay coil or a high-current MOSFET) cannot obtain closing energy and is disconnected. The battery management unit (BMS) and the load are thus isolated and enter a power-off or sleep state. To improve reliability, a normally open third switch K3 should be used and its open state should be the default in the fail-safe design. In addition, it is recommended to add redundancy to the first switch K1 disconnection path after the third switch K3 is open (e.g., parallel pull-down resistors and mechanical interlocks), and to perform sequential disconnection confirmation or add delay / feedback monitoring for the first switch K1 before the logic unit (LU) is disconnected to avoid malfunctions caused by instantaneous voltage fluctuations.

[0065] like Figure 1 and Figure 2 As shown, as an optional embodiment of the present invention, an embodiment in which the first switch K1 is indirectly controlled to open via a main control circuit is given below. The first switch K1 (including a first coil K1-Q and a first contact switch K1-S) is a contactor. The contactor includes a first coil K1-Q and a first contact switch K1-S. The third switch K3 is a relay. The relay includes a second coil and a second contact switch. The second coil is connected in series with the logic unit LU. The second contact switch is connected in series with the first coil K1-Q to form a second control circuit. The two ends of the second control circuit are connected to the two ends of a permanent bus. The first contact switch K1-S is connected in series with the battery management unit BMS. The logic unit LU is used to: acquire the wake-up signal, turn on the main control circuit so that the second coil is energized and controls the second contact switch to close, so that the first coil K1-Q is energized and closes the first contact switch K1-S; acquire the sleep signal, and after the on / off circuit is disconnected, cut off the main control circuit so that the second coil is de-energized and opens the second contact switch, so that the first coil K1-Q is de-energized and opens the first contact switch K1-S.

[0066] Specifically, the wake-up process can be summarized as follows:

[0067] Signal input: The logic unit (LU) receives a valid "wake-up signal" (such as a key press or a network command).

[0068] When the main control circuit is turned on: the logic unit LU immediately activates, turning on the main control circuit, and the main control circuit begins to work.

[0069] The third switch K3 is closed: the main control circuit drives the third switch K3 (which can be a relay) to close.

[0070] The second control circuit is energized: Since the third switch K3 is closed, the second control circuit (including the first coil K1-Q) forms a loop, and the first coil K1-Q is energized.

[0071] When the first switch K1 is closed: the first coil K1-Q generates a magnetic field, which drives the mechanically connected (first contact switch K1-S) to close, and the second control circuit closes, powering on the battery management unit (BMS).

[0072] Battery Management Unit (BMS) Power-on: After the BMS completes its self-test, it controls the closure of the second switch K2 to supply power to the train's low-voltage load 4, thus waking up the train.

[0073] The hibernation process can be summarized as follows:

[0074] Signal input: When the logic unit LU receives a "sleep signal" (such as a power-off command), almost simultaneously, the sleep signal is sent to the battery management unit BMS via hardwire or data stream. After the battery management unit BMS times out for the first duration (such as 30s), it disconnects the second switch K2, and the train enters sleep mode. The first switch K1 is awakened and the sleep mode is delayed for the second duration (such as 60s) before disconnecting. The battery management unit BMS is powered off and no longer consumes the power of the battery BAT.

[0075] The process of power failure in the Battery Management Unit (BMS) is as follows:

[0076] Main control circuit disconnected: The logic unit LU immediately activates, disconnecting the main control circuit, and the main control circuit stops working.

[0077] The third switch K3 is open: the main control circuit stops outputting, causing the third switch K3 to open.

[0078] The second control circuit loses power: Because the third switch K3 is open, the loop of the second control circuit is cut off, and the first coil K1-Q loses power with a delay (taking the first switch K1 with a power-off delay as an example).

[0079] First switch K1 is open: the magnetic field of the first coil K1-Q disappears, the first contact switch K1-S is open, and the battery management unit (BMS) loses power.

[0080] The logic unit LU is responsible for intelligently determining wake-up and sleep signals. Its low-power characteristics ensure that it consumes almost no power during standby. The main control circuit and the third switch K3 convert relatively small signals into signals that are sufficient to drive a high-current coil, effectively isolating and protecting the precision core control unit from the impact of high voltage and high current in the main circuit. This cascaded setup of "logic unit LU → main control circuit / third switch K3 → second control circuit / first coil K1-Q → first contact switch K1-S" realizes a step-by-step control method, ensuring safe and low-power automated power management for wake-up and sleep. The battery management unit (BMS) can delay cutting off its own power supply circuit after the vehicle goes into sleep mode, without affecting the normal wake-up and sleep functions, greatly improving the standby time of the battery (BAT).

[0081] In addition, a third circuit breaker S3 can be set on the first control circuit, a first circuit breaker S1 can be set on the main control circuit, and a second circuit breaker S2 can be set on the second control circuit to force disconnection and facilitate maintenance; a permanent load 3 can also be connected in parallel at both ends of the first control circuit. The permanent load 3 can be used to monitor the relay voltage, train lighting, or power supply for automatic driving.

[0082] like Figure 3 As shown, in a second aspect, embodiments of the present invention provide a train sleep / wake-up power supply control method, based on the train sleep / wake-up power supply system described above, comprising:

[0083] In the train wake-up state, a sleep signal is acquired. After the battery management unit (BMS) disconnects the switching circuit according to the sleep signal, the first control circuit is controlled to disconnect, so that the battery management unit (BMS) is de-energized. This includes: in the train wake-up state, acquiring a sleep signal and controlling the first control circuit to disconnect, so that the first control circuit disconnects after a second duration; wherein, the battery management unit (BMS) acquires the sleep signal and disconnects the switching circuit after a first duration, the second duration is longer than the first duration, and the time difference between the main control module and the battery management unit (BMS) acquiring the sleep signal is less than the difference between the second duration and the first duration;

[0084] When the train is in sleep mode, it receives a wake-up signal and controls the first control circuit to close, so that the battery management unit (BMS) controls the on / off circuit to close after power-on.

[0085] The specific implementation method of this embodiment can also refer to the corresponding implementation method described above, and will not be described again here.

[0086] Thirdly, embodiments of the present invention provide a train, including the train hibernation and wake-up power supply system as described in the above embodiments.

[0087] The specific implementation method of this embodiment can also refer to the corresponding implementation method described above, and will not be described again here.

[0088] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided by this invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0089] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

[0090] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A train sleep-wake power supply system, characterized by, The train hibernation wake-up power supply system comprises: The battery power supply module comprises a battery, a on-off circuit, a battery management unit and a first control circuit, the on-off circuit is arranged at both ends of the battery in series with the train low-voltage load (4), the battery management unit is connected to both ends of the battery through the first control circuit, the battery management unit is connected with the on-off circuit, and is used for: controlling the on-off circuit to be closed after power-on, or obtaining a hibernation signal and controlling the on-off circuit to be disconnected according to the hibernation signal; The on-off circuit comprises a second switch, the second switch is arranged at both ends of the battery in series with the train low-voltage load (4), and the battery management unit is connected with the second switch; The first control circuit comprises a first switch, the first switch and the battery management unit are arranged at both ends of the battery in series, and a third circuit breaker is further arranged on the first control circuit; The battery power supply module further comprises a charging unit, the charging unit is connected in parallel with the train low-voltage load (4), and a permanent load (3) is connected in parallel at both ends of the first control circuit; The battery power supply module further comprises a first diode and a second diode, the first diode is connected in series between the second switch and the train low-voltage load (4), the first diode is forward-biased and reverse-biased along the current direction of the battery, the anode of the second diode is connected with one end of the second switch away from the battery, and the cathode of the second diode is connected with one end of the first switch away from the battery management unit; The main control module is connected with the first control circuit, and the main control module is used for: In the train wake-up state, obtaining the hibernation signal, controlling the first control circuit to be disconnected after the battery management unit disconnects the on-off circuit according to the hibernation signal, so that the battery management unit loses power, including: in the train wake-up state, obtaining the hibernation signal, controlling the first control circuit to lose power, so that the first control circuit is disconnected after a second time period; wherein the battery management unit obtains the hibernation signal and is disconnected after a first time period, the second time period is greater than the first time period, and the time difference between the main control module and the battery management unit for obtaining the hibernation signal is less than the difference between the second time period and the first time period; In the train hibernation state, obtaining a wake-up signal, and controlling the first control circuit to be closed, so that the battery management unit controls the on-off circuit to be closed after being powered on.

2. The train sleep-wakeup power supply system according to claim 1, wherein The main control module is used for: obtaining the wake-up signal and controlling the first control circuit to be closed, so that the battery management unit is powered on and self-checking is completed, the second switch is closed, the train low-voltage load (4) is powered on, and the train is woken up; after the battery management unit disconnects the second switch according to the hibernation signal, the first control circuit is controlled to be disconnected, so that the battery management unit loses power.

3. The train sleep-wakeup power supply system according to claim 2, wherein The main control module is connected with the first switch, and is used for: controlling the first switch to be closed, so that the battery management unit is powered on; controlling the first switch to be disconnected, so that the battery management unit loses power.

4. The train sleep-wakeup power supply system according to claim 3, wherein The first switch is a delay switch, and the main control module is used for: In the train wake-up state, obtaining the hibernation signal, controlling the first switch to lose power, so that the first switch is disconnected after a second time period; The battery management unit acquires the sleep signal and disconnects the second switch after a first time duration.

5. The train sleep-wakeup power supply system according to any one of claims 1 to 4, characterized by, The main control module is configured to: when detecting that the charging unit is working, the sleep signal is invalid.

6. The train sleep-wakeup power supply system according to claim 3 or 4, characterized by The main control module includes a main control circuit connected to both ends of the permanent bus, the main control circuit includes a logic unit and a third switch connected in series, the third switch is used to control the opening and closing of the first switch, and the logic unit is used to: acquire the wake-up signal, turn on the main control circuit, so that the first switch is closed after the third switch is powered on; acquire the sleep signal, and cut off the main control circuit after the on-off circuit is disconnected, so that the first switch is disconnected after the third switch is powered off.

7. The train sleep-wakeup power supply system according to claim 6, wherein The first switch is a contactor, the contactor includes a first coil and a first contact switch, the third switch is a relay, the relay includes a second coil and a second contact switch, the second coil is connected in series with the logic unit, the second contact switch is connected in series with the first coil to form a second control circuit, and two ends of the second control circuit are connected to both ends of the permanent bus. The first contact switch is connected in series with the battery management unit, and the logic unit is used to: acquire the wake-up signal, turn on the main control circuit, so that the second coil is powered on to control the second contact switch to be closed, so that the first coil is powered on to close the first contact switch; acquire the sleep signal, and cut off the main control circuit after the on-off circuit is disconnected, so that the second coil is powered off to disconnect the second contact switch, and the first coil is powered off to disconnect the first contact switch.

8. A train sleep wake-up power supply control method, characterized by, The train sleep and wake-up power supply system according to any one of claims 1-7, comprising: In the train wake-up state, the sleep signal is acquired, and after the battery management unit disconnects the on-off circuit according to the sleep signal, the first control circuit is controlled to be disconnected, so that the battery management unit is powered off, comprising: in the train wake-up state, the sleep signal is acquired, and the first control circuit is controlled to be powered off, so that the first control circuit is disconnected after a second time duration; wherein the battery management unit acquires the sleep signal and disconnects the on-off circuit after a first time duration, the second time duration is greater than the first time duration, and the time difference between the main control module and the battery management unit acquiring the sleep signal is less than the difference between the second time duration and the first time duration; In the train sleep state, the wake-up signal is acquired, and the first control circuit is controlled to be closed, so that the battery management unit is powered on to control the on-off circuit to be closed.

9. A train characterized by The train sleep and wake-up power supply system according to any one of claims 1-7.

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