A multi-power supply system with a current wake-up function and its control method

Abstract

The present invention relates to a multi-power system with a current wake-up function and a control method thereof, belonging to the field of new energy applications. Facing the application requirements of long endurance and high reliability for energy storage power supplies, the design and operation management strategy of a multi-redundant energy storage system play a decisive role in the high-efficiency application of the system. The present invention provides a multi-power management control strategy to reduce the reactive operation energy consumption of the power management system by optimizing the sleep and wake-up strategies of the power management system, and to achieve high energy efficiency and high reliability applications of energy storage units.

Description

Technical Field

[0001] The present invention relates to a multi-power supply system, in particular to a multi-power supply system with a sleep and wake-up function and an operation method thereof, and belongs to the field of new energy application. Background Art

[0002] With the development of intelligent and clustered deep-sea equipment, underwater long-term lurking power systems have become a bottleneck in technological development. Limited by size and weight, conventional powered underwater unmanned submersibles (AUVs) and manned deep-sea submersibles (HOVs) currently carry relatively low amounts of electricity, and their deep-sea operation time is relatively short, concentrated in 6-20 hours. They need to be regularly recovered and recharged, and their operation efficiency is low, which cannot meet the needs of replenishing power in the deep sea and long-term continuous operation. Establishing a large-capacity power supply system underwater can provide an underwater energy foundation for the intelligent and clustered development of deep-sea equipment and promote the development of deep-sea resources. The construction and management of a low-power, highly reliable, and multi-redundant large-capacity energy system will greatly promote the intelligent development of deep-sea equipment. Summary of the invention

[0003] The present invention provides a multi-power supply system with a current wake-up function, which mainly comprises n (where n≥2) energy storage system units connected in parallel and composed of energy storage batteries and battery management systems, a charge and discharge control relay array, an MCU main controller, a DC / DC module, and a power distribution management unit. The positive and negative power output ends of the energy storage system units are connected to current wake-up detection loads. The MCU main controller is connected to each energy storage system unit through bus communication, and outputs I / O control signals that are independently connected to the control ends of each relay. According to peripheral working condition information, the wake-up detection load is connected through the wake-up relay, the state of the energy storage system unit is obtained through bus communication, and the series-parallel output array of the power supply system is controlled to achieve efficient conversion between low power consumption and high power, thereby providing a highly concealed and long-endurance energy solution for deep-sea energy.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A multi-power supply system with a current wake-up function mainly includes n (where n≥2) energy storage system units connected in parallel consisting of energy storage batteries and battery management systems, a charge and discharge control relay array, an MCU main controller, a DC / DC module, and a power distribution management unit. The positive and negative power output ends of the energy storage system units are connected to current wake-up detection loads, and the MCU main controller is connected to each energy storage system unit through bus communication, and outputs I / O control signals that are independently connected to the control ends of each relay.

[0006] In the above-mentioned multi-power supply system with current wake-up function, the energy storage system unit includes a battery unit, a battery management system, and a current wake-up detection load. The battery management system is a charging and discharging port, has battery monomer and battery unit status collection and communication protection functions, and has sleep and wake-up functions. The battery unit status collection includes but is not limited to voltage, current, temperature, water seepage and other status parameters.

[0007] In the above-mentioned multi-power supply system with current wake-up function, the power supply of the MCU main controller comes from the battery cells of each energy storage system unit, the positive electrode of each battery cell is connected in parallel to the positive input terminal of the DC / DC after a diode, the negative electrode of each battery cell is directly connected in parallel to the negative input terminal of the DC / DC, and the output terminal of the DC / DC is connected to the power input terminal of the MCU main controller.

[0008] In the above-mentioned multi-power supply system with current wake-up function, the power supply of the MCU main controller is equipped with an independent controller battery pack, the positive and negative poles of the controller battery pack are respectively connected to the power input end of the DC / DC, and the output end of the DC / DC is connected to the power input end of the MCU main controller.

[0009] In the above-mentioned multi-power supply system with current wake-up function, the current wake-up detection load is composed of a wake-up detection relay and a discharge resistor.

[0010] In the above-mentioned multi-power supply system with current wake-up function, the current wake-up detection load is composed of a wake-up detection relay, a current limiting resistor and an LED.

[0011] In the above-mentioned multi-power supply system with current wake-up function, it is characterized in that: the wake-up relay is a normally open relay, and the control end input power is provided by the MCU.

[0012] In any of the above-mentioned multi-power supply systems with current wake-up function, the MCU main controller and each energy storage system unit communicate using any one of RS232, RS485, RS422 or CAN bus, the communication system structure is a master-slave structure, and the MCU master station polling communication method is adopted to reduce the data transmission volume of multi-power supply nodes.

[0013] In any of the above-mentioned multi-power supply systems with current wake-up function, the charge and discharge control relay array is composed of a first relay array connected to the negative end of the energy storage system unit and a second relay array at the positive discharge end of the energy storage system unit. The negative pole of each charging port of the energy storage system unit is directly connected to the parallel node of the first relay array, and the positive pole of each charging port of the energy storage system unit is connected to the positive pole of each energy storage system unit.

[0014] In any of the above-mentioned multi-power supply systems with current wake-up function, the electronic components of the power supply system can withstand a water pressure of 110 MPa.

[0015] In any of the above-mentioned multi-power supply systems with current wake-up function, the electronic components of the power supply system can withstand a water pressure of 110-130 MPa.

[0016] In any of the above-mentioned multi-power supply systems with current wake-up function, the electronic components of the power supply system can withstand a water pressure of 127 MPa.

[0017] In any of the above-mentioned multi-power supply systems with current wake-up function, the electronic components of the power supply system can withstand a water pressure of 45-127 MPa.

[0018] In any of the above-mentioned control methods for a multi-power system with a current wake-up function, the energy storage system units of the multi-power system set the ID and self-sleep time of each energy storage system unit through the host computer system. When there is no external load and bus communication, all energy storage system units go into sleep mode and enter an ultra-low power consumption state, and the MCU cannot obtain the energy storage system unit information through the bus.

[0019] In any of the above-mentioned control methods for a multi-power supply system with a current wake-up function, after the external load sends an operation request to the MCU, the MCU main controller first sends a voltage command to the wake-up relay of the target energy storage system unit, connects the current wake-up load of the target energy storage system unit, and the target energy storage system unit is awakened. The MCU actively polls the status of the target energy storage system unit through the bus, the target energy storage system unit is continuously in polling communication, and the energy storage system unit is activated.

[0020] In any of the above-mentioned control methods for a multi-power system with a current wake-up function, the MCU turns off the wake-up relay of the energy storage system unit and disconnects the energy storage system unit to wake up the load.

[0021] In any of the above-mentioned control methods for a multi-power system with a current wake-up function, the MCU selects a charge and discharge control relay array to be connected according to the state of the energy storage system unit, and the corresponding multi-power system is output in parallel.

[0022] In any of the above-mentioned control methods for a multi-power system with a current wake-up function, when the external load is running in silence, the MCU main controller releases the control signal of the charge and discharge control relay, the relay is disconnected, and some energy storage system units enter a sleep state.

[0023] In any of the above-mentioned control methods for a multi-power system with a current wake-up function, when the multi-power system is charged, the MCU main controller controls the first relay to close and the second relay to disconnect, and the energy storage system unit can be charged independently.

[0024] The advantages of the present invention are:

[0025] The patent of this invention reduces the standby power consumption of the energy storage system unit to a minimum through automatic sleep and current wake-up functions, builds an intelligent multi-redundant energy supply network, improves the energy utilization rate of the multi-power supply system, and is suitable for more extensive and complex underwater working conditions, providing a highly concealed and long-endurance energy solution for deep-sea energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The invention relates to a multi-power supply system with a current wake-up function.

[0027] Figure 2 The invention relates to a multi-power system with a current wake-up function.

[0028] Figure 3 Run control flow for multi-power supply system with current wake-up function. DETAILED DESCRIPTION

[0029] First, m secondary battery cells are connected in parallel to form a parallel battery, and then n parallel batteries are connected in series to form a battery unit consisting of n*m secondary battery cells connected in series and parallel. The voltage of the battery unit is n*U1, where U1 is the voltage of each battery cell, n≥1, m≥1.

[0030] The power management system BMS is connected to the battery unit to form an energy storage system unit. The power management system BMS is a charging and discharging port with battery monomer and battery unit status collection and communication protection functions, and can collect voltage, current, temperature, water seepage and other information in real time.

[0031] like Figure 1, connect the power management system BMS to the battery unit to form an energy storage system unit, wherein the BMS is a charging and discharging port, has the functions of battery monomer and battery unit status collection and communication protection, and can collect voltage, current, temperature, water seepage and other information in real time; connect no less than 2 energy storage system units, current wake-up detection load, relay array, MCU main controller, DC / DC module, and power distribution management unit in sequence, wherein the current wake-up detection load is directly connected to the positive and negative power output ends of the energy storage system unit, the negative end of the energy storage system unit is connected in series with the first relay array and then connected in parallel to the power distribution input end of the power distribution management unit, the positive end of the energy storage system unit is connected in series with the second relay array and then connected in parallel to the power distribution input end of the power distribution management unit, the negative pole of each charging port of the energy storage system unit is directly connected to the parallel node of the first relay array, the positive pole of each charging port of the energy storage system unit is directly connected to the positive pole of each energy storage system unit, the MCU main controller is connected to the BMS of each energy storage system unit through bus communication, and the output I / O control signal is independently connected to the control end of each relay. The positive pole of each battery cell is connected in parallel to the positive input terminal of the DC / DC after passing through a diode, and the negative pole of each battery cell is directly connected in parallel to the negative input terminal of the DC / DC. The output terminal of the DC / DC is connected to the power input terminal of the MCU main controller.

[0032] like Figure 2 , connect no less than 2 energy storage system units, current wake-up detection load, relay array, MCU main controller, DC / DC module, and power distribution management unit in sequence, wherein the current wake-up detection load is directly connected to the positive and negative power output terminals of the energy storage system unit, the negative terminal of the energy storage system unit is connected in series with the first relay array and then connected in parallel to the power distribution input terminal of the power distribution management unit, the positive terminal of the energy storage system unit is connected in series with the second relay array and then connected in parallel to the power distribution input terminal of the power distribution management unit, the negative pole of each charging port of the energy storage system unit is directly connected to the parallel node of the first relay array, the positive pole of each charging port of the energy storage system unit is directly connected to the positive pole of each energy storage system unit, the MCU main controller is connected to the BMS of each energy storage system unit through bus communication, and the output I / O control signal is independently connected to the control terminal of each relay. The power supply of the MCU main controller is equipped with an independent controller battery pack, the positive and negative poles of the controller battery pack are respectively connected to the power input terminal of the DC / DC, and the output terminal of the DC / DC is connected to the power input terminal of the MCU main controller.

[0033] The energy storage system units of the multi-power system with current wake-up function set the ID and self-sleep time of each energy storage system unit through the host computer system. When there is no external load and bus communication, all energy storage system units are dormant and enter an ultra-low power consumption state. The MCU cannot obtain the energy storage system unit information through the bus.

[0034] After the external load sends a running request to the MCU, the MCU main controller first sends a voltage command to the wake-up relay of the target energy storage system unit, connects the current of the target energy storage system unit to wake up the load, and the target energy storage system unit is awakened. The MCU actively polls the status of the target energy storage system unit through the bus. The target energy storage system unit continues to be in polling communication, and the energy storage system unit is activated; the MCU turns off the wake-up relay of the energy storage system unit and disconnects the energy storage system unit to wake up the load.

[0035] The MCU selects the charge and discharge control relay array that needs to be connected according to the status of the energy storage system unit, and the corresponding multi-power system outputs in parallel.

[0036] When the external load is running in silence, the MCU main controller releases the control signal of the charge and discharge control relay, the relay is disconnected, and some energy storage system units enter the sleep state.

[0037] When the multi-power system is charged, the MCU main controller controls the first relay to close and the second relay to disconnect, and the energy storage system unit can be charged independently.

Claims

1. A multi - power system with a current wake - up function mainly includes n energy storage system units connected in parallel, each consisting of an energy storage battery and a battery management system, a charge - discharge control relay array, an MCU main controller, a DC / DC module, and a power distribution management unit, where n≥2. Characterized in that: The positive and negative power output terminals of the energy storage system unit are connected to a current wake - up detection load; the energy storage system unit includes a battery unit, a battery management system, and a current wake - up detection load; the battery management system has the same charge - discharge port, with functions of collecting and communicating the states of battery cells and battery units, as well as protection, and has sleep and wake - up functions; the MCU main controller communicates with each energy storage system unit using any one of RS232, RS485, RS422, or CAN bus. The communication system structure is a master - slave structure, and the MCU master station polling communication method is adopted to reduce the data transmission volume of multi - power nodes; the negative terminal of the energy storage system unit is connected in parallel to the power distribution input terminal of the power distribution management unit after being connected in series with the first relay array, and the positive terminal of the energy storage system unit is connected in parallel to the power distribution input terminal of the power distribution management unit after being connected in series with the second relay array respectively. The negative pole of each charging port of the energy storage system unit is directly connected to the parallel node of the first relay array, and the positive pole of each charging port of the energy storage system unit is directly connected to the positive pole of each energy storage system unit respectively. The MCU main controller is connected to the BMS of each energy storage system unit through bus communication, and at the same time outputs I / O control signals to be independently connected to the control terminals of each relay.

2. The multi - power system with a current wake - up function according to claim 1, Characterized in that: The power supply of the MCU main controller comes from the battery units of each energy storage system unit. The positive poles of each battery unit are connected in parallel to the positive input terminal of the DC / DC after passing through diodes, and the negative poles of each battery unit are directly connected in parallel to the negative input terminal of the DC / DC. The output terminal of the DC / DC is connected to the power supply input terminal of the MCU main controller.

3. The multi - power system with a current wake - up function according to claim 1, Characterized in that: The power supply of the MCU main controller is equipped with an independent controller battery pack. The positive and negative poles of the controller battery pack are respectively connected to the power supply input terminals of the DC / DC, and the output terminal of the DC / DC is connected to the power supply input terminal of the MCU main controller.

4. The multi - power system with a current wake - up function according to claim 1, Characterized in that: The current wake - up detection load consists of a wake - up detection relay and a discharge resistor.

5. The multi - power system with a current wake - up function according to claim 1, Characterized in that: The current wake - up detection load consists of a wake - up detection relay, a current - limiting resistor, and an LED.

6. The multi - power system with a current wake - up function according to claim 4 or 5, Characterized in that: The wake - up detection relay is a normally - open relay, and the power supply input to its control terminal is provided by the MCU.

7. The multi - power system with a current wake - up function according to claim 1, Characterized in that: The charge and discharge control relay array is composed of a first relay array connected to the negative extreme of the energy storage system unit and a second relay array connected to the positive extreme of the energy storage system unit during discharge. The negative pole of each charging port of the energy storage system unit is directly connected to the parallel node of the first relay array, and the positive pole of each charging port of the energy storage system unit is connected to the positive pole of each energy storage system unit.

8. A method for operating a multi-power supply system with a current wake-up function according to any one of claims 1-7, characterized in that: (1) The energy storage system units of the multi-power supply system set the IDs and self-sleep times of the energy storage system units through the host computer system. When there is no external load and bus communication, all the energy storage system units go to sleep and enter the ultra-low power consumption state, and the MCU cannot obtain the information of the energy storage system units through the bus; (2) After the external load sends a running request to the MCU, the main controller of the MCU first sends a voltage command to the wake-up relay of the target energy storage system unit to turn on the current wake-up load of the target energy storage system unit. The target energy storage system unit is woken up, and the MCU actively polls the status of the target energy storage system unit through the bus. The target energy storage system unit is continuously in the polling communication, and the energy storage system unit is activated; (3) The MCU turns off the wake-up relay of the energy storage system unit and disconnects the wake-up load of the energy storage system unit; (4) The MCU selects the charge and discharge control relay array to be connected according to the status of the energy storage system unit, and the corresponding multi-power supply system outputs in parallel; (5) When the external load operates silently, the main controller of the MCU releases the control signal of the charge and discharge control relay, the relay disconnects, and some energy storage system units enter the sleep state; (6) When the multi-power supply system is charging, the main controller of the MCU controls the first relay to close and the second relay to open, and the energy storage system unit can charge independently.

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