TWI671537B - Battery exchange station control system and method - Google Patents

Abstract

The invention provides a battery exchange station control system and method. The battery exchange station control method is executed by the control system. The battery exchange station control system includes a bidirectional power conversion unit electrically connected to a power grid system and a plurality of battery modules; a monitoring The module receives information on the state of the power grid and uses it to determine whether the power grid system is in a peak power state. When it is judged that the peak power state, the monitoring module controls the bidirectional power conversion unit to receive batteries from each of the battery modules Voltage, convert the battery voltage into a playback voltage, and output the playback voltage to the grid system from the first connection terminal, so as to actively increase the total power supply of the grid system during peak power periods and increase the overall backup load of the grid system Purpose of capacity.

Description

Battery exchange station control system and method

A control system and method, especially a battery exchange station control system and control method.

For a long time, energy technology has been mainly used to convert chemical energy into various energy sources. For example, the internal combustion engine is the combustion of oil to generate power to promote transportation. However, when burning fossil fuels, exhaust gas is generated, causing air pollution. In recent years, awareness of environmental protection has risen, and air pollution has gradually received attention. Therefore, reducing the use of petrochemical fuels has become a major effort. With the development of energy technology, the conversion efficiency of electric energy into kinetic energy has increased and the cost of technology has decreased. Therefore, vehicles such as electric vehicles and electric vehicles driven by electric energy that do not emit exhaust gas are also more common in urban traffic. Taking electric locomotive as an example, most existing power supply solutions are provided with a battery exchange station. The battery exchange station is set at a fixed point and receives mains power as a power source. The battery exchange station includes a charging module and a plurality of rechargeable batteries, and is charged through The module charges the rechargeable battery. When the electric vehicle's rechargeable battery is about to run out of power, the user of the electric vehicle can drive the electric vehicle near the battery exchange station, and the user can remove the exhausted rechargeable battery from the electric vehicle and place it in the battery exchange station. , Let the battery exchange station charge the rechargeable battery. The user can take out other fully-charged rechargeable batteries from the battery exchange station, and place the fully-charged rechargeable batteries on the electric vehicle, providing the electric vehicle as a source of electrical energy.

The charging module in the existing battery exchange station charges the rechargeable battery immediately when it detects that one of the rechargeable batteries is not fully charged, so that the rechargeable battery in the battery exchange station can be maintained at full power at any time. status. However, when the grid system, such as the city power, is in the peak power consumption period, the reserve capacity of the grid system is relatively low, which means that the total load of the grid system is high, and it may even approach or exceed the maximum power supply of the overall grid system. Therefore, if the battery exchange station charges each of the rechargeable batteries at the peak power usage time, it will further increase the load of the power grid system, and may cause a dangerous situation that the power supply of the power grid system is insufficient. Therefore, the existing battery exchange stations must be further improved.

In view of the burden on the power grid system caused by the charging of the existing battery exchange station during the peak power usage period, the present invention provides a battery exchange station control system and method. The control system includes: a bidirectional power conversion module having a control terminal, A first connection terminal and a plurality of second connection terminals, wherein the first connection terminal is electrically connected to the grid system; a plurality of battery modules, each of the battery modules are electrically connected to each of the two-way power conversion modules, respectively A second connection terminal; a monitoring module electrically connected to the control terminal of the bidirectional power conversion module; wherein: the monitoring module receives a state information of a power grid, and determines whether a power consumption state of the power grid system is based on the state information of the power grid Peak power consumption state; When the monitoring module judges that the power consumption state is the peak power consumption state, the monitoring module generates a discharge control signal and transmits it to the control end of the bidirectional power conversion module; when the bidirectional power conversion module When the group receives the discharge control signal, the two-way power conversion module receives a battery voltage of each of the battery modules from each of the second connection ends, Converting the battery voltage to a voltage of playback, and the playback from the first voltage output terminal is connected to the grid system.

The battery exchange station control method is executed by a battery exchange station control system, and includes the following steps: receiving a power grid state information; whether a power consumption state according to the power grid state information is a peak power state; when it is judged that the peak power state When the power is used, a discharge control signal is generated; when the discharge control signal is generated, a plurality of battery voltages output by the plurality of battery modules are received, and each of the battery voltages is converted to generate a playback voltage, and the playback voltage is output to a power grid system.

The battery exchange station plays back the electric energy of each battery module to the electric grid system through the bidirectional power conversion module when the peak power consumption state of the grid system is used, that is, reversely converts the electric energy of each battery module into the playback. The voltage is incorporated into the grid system as a source of power for other loads in the grid system. In other words, the battery exchange station control system of the present invention provides each of the battery modules as a reserve capacity of the power grid system, and stops charging the battery modules when the power grid system is in a peak power state. In order to alleviate the tight power demand of the grid system, and further return the power stored in the battery modules to the grid system, and provide the power source for the grid system, to actively increase the peak power consumption period The purpose is to increase the total power supply capacity of the power grid system as a whole.

Please refer to FIG. 1. The present invention provides a battery exchange station control system and method. The battery exchange station control system includes a bidirectional power conversion module 10, a plurality of battery modules 20 and a monitoring module 30. The bidirectional power conversion The module 10 includes a first connection terminal 101, a plurality of second connection terminals 102, and a control terminal 103. The first connection terminal 101 is connected to a power grid system 40, and each of the battery modules 20 is electrically connected to the bidirectional power supply. The second connection end 102 of the conversion module 10. The monitoring module 30 is electrically connected to the control terminal of the bidirectional power conversion module. The monitoring module 30 receives power grid state information, and determines whether a power state of the power grid system 40 is a peak power state based on the grid state information.

When the monitoring module 30 determines that the power consumption state is the peak power consumption state, the monitoring module 30 further generates a discharge control signal and transmits it to the control terminal 103 of the bidirectional power conversion module 10. When the two-way power conversion module 10 receives the discharge control signal, the two-way power conversion module 10 receives the battery voltage of each of the battery modules 20 from each of the second connection ends 102, and converts the battery voltage to the battery voltage. Is a playback voltage, and the playback voltage is output from the first connection terminal 101 to the grid system 40.

Please refer to FIG. 2, the battery exchange station control method of the present invention is executed by the battery exchange station control system and includes the following steps: receiving a grid state information (S201); judging a grid system's power consumption according to the grid state information Whether the state is a peak power state (S202); when it is judged that the power state is the peak power state, a discharge control signal is generated (S203); when the discharge control signal is generated, the output of a plurality of battery modules is received. The plurality of battery voltages are converted into a playback voltage, and the playback voltage is output to a power grid system (S204).

When the battery exchange station is in the peak power consumption state of the grid system 40, the electric energy of each battery module 20 is played back to the grid system 40 through the bidirectional power conversion module 10, which is reversed compared to the general charging of batteries. The power of each battery module 20 is converted into the playback voltage to be incorporated into the power grid system 40 as a power source for other loads in the power grid system 40. That is, the battery exchange station control system of the present invention provides each of the battery modules 20 as a reserve capacity of the power grid system 40. When the power grid system 40 is in a peak power state, the battery modules are stopped for each of the battery modules. The charging operation of 20 relieves the state of tight power demand of the grid system 40, and further outputs the electric energy stored in each of the battery modules 20 to the grid system 40, and provides it as a voltage source for the grid system 40. The total power supply of the power grid system during the peak power consumption state is increased to achieve the purpose of increasing the overall backup capacity of the power grid system 40.

Further, when the monitoring module 30 determines that the power consumption state is a non-peak power consumption state, the monitoring module 30 generates a charging control signal and transmits it to the control terminal 103 of the bidirectional power conversion module 10; when the The bidirectional power conversion module 10 receives the charging control signal. The bidirectional power conversion module 10 receives a grid voltage from the first connection terminal 101 and converts the grid voltage into a charging voltage, and each of the second connections The terminal 102 outputs the charging voltage to charge each of the battery modules 20.

Please continue to refer to FIG. 2. In the preferred embodiment, the method for controlling a battery exchange station further includes the following steps: When it is determined that the power consumption state is a non-peak power consumption state, a charging control signal is generated (S205); According to the charging control signal, a grid voltage is received, and the grid voltage is converted to generate a charging voltage to charge at least one battery module (S206).

That is, the battery exchange station of the present invention receives the grid voltage from the grid system 40 and determines the battery mode of the battery exchange station when the monitoring module 30 determines that the electricity consumption state of the grid system 40 is the non-peak electricity consumption state. The group 20 is charged. Since the non-peak power consumption state indicates that the power supply of the grid system 40 is sufficient, the battery exchange station charging the battery modules 20 at this time will not cause a burden on the grid system 40, and can output the grid system 40. The excess electrical energy is stored in the battery modules 20 of the battery exchange station as a backup capacity to play back to the grid system 40 when the power supply of the grid system 40 is in a state of peak power consumption. Is the source of electrical energy. In this way, the function of actively shifting peaks and filling valleys of the power demand curve of the grid system 40 is achieved.

In a first preferred embodiment of the present invention, the discharge control signal generated by the monitoring module 30 includes information on the quantity of reserved batteries. When the bidirectional power conversion module 10 receives the discharge control signal, the bidirectional power conversion module 10 controls the first number of second connection terminals 102 to be disconnected from the battery module according to the information on the number of reserved batteries in the discharge control signal. 20 electrical connections. That is, when the power grid system 40 is in a peak power usage state, the bidirectional power conversion module 10 can disconnect the first number of battery modules 20, thereby retaining the disconnected battery modules. 20 battery power, and only the battery modules 20 except the first number of battery modules 20 in each of the battery modules 20 receive the battery voltage, convert it to the playback voltage, and output it to the grid system 40.

For example, the total number of battery modules 20 included in the battery exchange station is 30, and the first number is 10. Therefore, during the peak power consumption state, the bidirectional power conversion module 10 replaces 10 batteries. The connection of the module 20 is disconnected, so that the battery exchange station can reserve 10 fully charged battery modules 20 for users to exchange and use. The remaining 20 battery modules 20 are replayed to the grid system 40, thereby increasing the backup capacity of the grid system 40 during peak power usage.

In other words, when the monitoring module 30 determines the peak power consumption state of the grid system 40, the bidirectional power conversion module 10 is received by the remaining 20 battery modules 20 that are still connected to the second connection terminal 102. The battery voltage of the battery modules 20 is converted into a playback voltage for output to the grid system from the first connection terminal 101. In this way, the battery exchange station can ensure that there are still 10 fully charged battery modules 20 for users to exchange batteries, and the power of the remaining 20 battery modules 20 can be played back to the grid system 40, thereby Reduce the load while increasing the backup capacity.

In the preferred embodiment, the reserved battery quantity information is generated by the monitoring module 30 according to a historical statistical information of the battery exchange station. For example, the battery exchange station confirms that the number of batteries should be retained according to the battery exchange frequency of the location, to ensure that even during peak periods, the battery exchange station receives battery voltage conversion by some battery modules 20 to convert the battery The electrical energy of the module 20 is output to the grid system, and the battery exchange station still retains a sufficient number of fully-charged battery modules 20 that meet the needs of users in the location for users to obtain. Preferably, the monitoring module 30 adjusts the retained battery quantity information according to the continuously updated historical statistical information.

The following is a further description of a preferred embodiment of the battery exchange station control system of the present invention.

Please refer to FIG. 3. In a second preferred embodiment of the present invention, the bidirectional power conversion module 10 includes a power conversion unit 11, a charge control unit 12, and a switching unit 13. The power conversion unit 11 The first connection terminal 101 and the control terminal 103 are electrically connected, the switching unit 13 is electrically connected to the power transformation unit 11, the control terminal, and each of the second output terminals, and the charging control unit 12 is electrically connected to the power transformation unit 11 And between the switching unit 13. When the switching unit 13 and the power transformation unit 11 receive the discharge control signal, the switching unit 13 controls the power transformation unit 11 to be electrically connected to each of the second connection terminals 102. The power transformation unit 11 is based on the discharge control signal. The battery voltage of each of the second connection terminals 102 is received via the switching unit 13, a current conversion and boost conversion is performed, the battery voltage is converted into the playback voltage, and the playback voltage is output from the first connection terminal 101 to the power grid System 40.

Further, when the switching unit 13 and the power transformation unit 11 receive the charging control signal from the control terminal 103, the power transformation unit 11 receives the grid voltage from the first connection terminal 101, and performs a rectification conversion. Generate a first DC voltage. The switching unit 13 controls the charging control unit 12 to be electrically connected to each of the second connection terminals 102, and when the charging control unit 12 receives the first DC voltage generated by the power conversion unit 11, the charging control unit 12 The voltage status of the battery module 20 at the second connection terminal 102 determines the remaining power of each battery module 20, and converts the first DC voltage into different charging voltages, and outputs the charging voltage to the charging unit via the switching unit 13. The voltage is applied to each of the second connection terminals 102 for charging each of the battery modules 20, so as to perform charging at an appropriate charging voltage and current under different remaining power conditions of each of the battery modules 20. For example, when the charging control unit 12 determines that the remaining power of one of the battery modules 20 is 80%, the charging control unit 12 converts the first DC voltage into a charging voltage with a higher voltage value according to the remaining power. And output a low current to charge the battery module 20 with a remaining power of 80%; and when the charging control unit 12 determines that the remaining power of the other battery module 20 is 20%, the charging control unit 12 according to the remaining power Convert the first DC voltage into a charging voltage with a lower voltage value, and output a high current to charge the battery module 20 with a remaining power of 20% to achieve high-efficiency charging, and at the same time ensure the battery module 20 Quality and longevity.

Please refer to FIG. 4. In a third preferred embodiment of the present invention, the bidirectional power conversion module 10 includes a plurality of power conversion units 11 and a switching unit 13, and each of the power conversion units 11 is electrically connected to the power conversion unit 11. The first connection terminal 101 and the control terminal 103, the switching unit 13 is connected between each of the power conversion units 11 and each of the second connection terminals 102, and the switching unit 13 is electrically connected to the control terminal 103. When the switching unit 13 and each of the power conversion units 11 receive the discharge control signal generated by the monitoring module 30 by the control terminal 103, the switching unit 13 controls each of the power conversion units 11 to be electrically connected to one of the second The connection terminal 102 is received by one of the battery modules 20 of the at least one power conversion unit 11, the battery voltage is converted into the playback voltage, and the playback voltage is output from the first connection terminal 101 to the grid system 40. .

Further, when the switching unit 13 and each of the power transformation units 11 receive the charging control signal, the switching unit 13 controls each of the power transformation units 11 to be electrically connected to one of the second connection terminals 102 according to the charging control signal. Each of the power conversion units 11 receives the grid voltage from the first connection terminal 101, converts the grid voltage to the first DC voltage, and outputs the first DC voltage to each of the second connection terminals 102 via the switching unit 13. In the preferred embodiment, the first DC voltage is a charging voltage output to each of the battery modules 20.

In the preferred embodiment, the bi-directional power conversion module 10 includes a plurality of power conversion units 11 respectively connected to the battery module 20 for bi-directional power conversion, so that the monitoring module 30 can perform the power conversion on each of the power conversion units. 11 Perform power conversion control separately to improve overall power conversion efficiency. The monitoring module 30 controls the first number of power conversion units 11 to stop receiving the battery voltage of the battery module 20 from the first number of second connection terminals 102 and converts them into The playback voltage is used to retain the first number of battery modules 20 to provide users with battery exchange. Further, the monitoring module 30 can determine the remaining power of each of the battery modules 20 through the switching unit 13 and adjust the remaining battery quantity information in the discharge control signal accordingly, for example, when the battery machine has a new station When the number of battery modules 20 with sufficient power does not reach the first number, a portion of the charging control signals are generated to control the second number of power conversion units 11 to receive the grid voltage from the first connection terminal 101, convert the voltage to the charging voltage, and output To a second number of second connection terminals 102 to charge the battery modules 20, and stop charging when the battery modules 20 with sufficient power reach the first number, to ensure that a sufficient number of battery modules 20 are still provided The user exchanges batteries and avoids further loading the grid system 40.

Please refer to FIG. 5. Preferably, in a fourth preferred embodiment of the present invention, the bidirectional power conversion module 10 further includes a plurality of charging control units 12, each of which is connected to each of the charging control units 12. Between the power conversion unit 11 and the switching unit 13. When the switching unit 13 receives the discharge control signal, the switching unit 13 controls a second connection terminal 102 to be electrically connected directly to one of the transformer units 11. When the switching unit 13 and each of the transformer units 11 receive the discharge control signal, the switching unit 13 controls a charging control unit 12 to be electrically connected to one of the second connection terminals 102, and the transformer unit 11 receives The grid voltage is converted into a first DC voltage. The charging control unit 12 receives the first DC voltage, converts the first DC voltage into the charging voltage, and outputs the charging voltage to the second connection terminal 102 through the switching unit 13. . In the preferred embodiment, each of the charging control units 12 further converts the first DC voltage to produce a charging voltage according to the power state of each of the battery modules 20. In this way, the bidirectional power conversion module 10 generates the charging voltage according to the power state of each power module 20 to ensure the charging quality of each battery module 20.

Please refer to FIG. 6. In a fifth preferred embodiment of the present invention, the bidirectional power conversion module 10 includes a current conversion unit 14, a DC voltage conversion unit 15, a charging control unit 12 and a switch. Unit 13, the converter unit 14 is electrically connected to the control terminal 103, and has an AC connection terminal and a DC connection terminal, and the AC connection terminal is electrically connected to the first connection terminal 101. The DC transformer unit 15 is electrically connected to the control terminal 103 and the DC connection terminal of the converter unit 14; the switching unit 13 is electrically connected to the control terminal 103, and is electrically connected to the DC transformer unit 15 and each of the second connection terminals. 102, and the charging control unit 12 is electrically connected between the DC voltage conversion unit 15 and the switching unit 13.

When the switching unit 13, the DC transformer unit 15, and the converter unit 14 receive the discharge control signal from the control terminal 103, the switching unit 13 controls each of the second connection terminals 102 to be electrically connected to the DC transformer unit 15 and the DC voltage conversion unit 15 receives the battery voltage of each of the battery modules 20 via each of the second connection ends 102, and performs a DC-to-voltage conversion on the battery voltage to generate a second DC voltage; the current conversion unit 14 After receiving the second DC voltage, the second DC voltage is converted into the playback voltage.

When the switching unit 13, the DC voltage conversion unit 15 and the current conversion unit 14 receive the charging control signal from the control terminal 103, the switching unit 13 controls the charging control unit 12 to be connected to each of the second connection terminals 102. And the converter unit 14 receives the grid voltage from the first connection terminal 101, performs a rectification conversion on the grid voltage, and outputs the rectified grid voltage to the DC transformer unit 15. The DC transformer unit 15 receives the rectified grid voltage DC-to-DC conversion is performed to generate a third DC voltage and output to the charging control unit 12; when the charging control unit 12 receives the third DC voltage, the charging control unit 12 is electrically connected to each via the switching unit 13 The second connection terminal 102 judges the remaining power of each of the battery modules 20, controls the third DC voltage, generates the charging voltage, and outputs the charging voltage to the second connection terminals 102 through the switching unit 13. To charge each of the battery modules 20.

Please refer to FIG. 7. In a sixth preferred embodiment of the present invention, each of the battery modules 20 includes a power storage unit 21 and a battery management unit 22. The power storage unit 21 is electrically connected to one of the second connections. The terminal 102 outputs the battery voltage or receives the charging voltage, and the battery management unit 22 is electrically connected to the power storage unit 21 to detect the voltage situation of the power storage unit 21 and generate power storage status information. The charging control unit 12 is electrically connected to the battery management unit 22 to receive the power storage status information, and controls the first DC voltage to generate the charging voltage accordingly. The battery management unit 22 of each battery module 20 measures the voltage of the power storage unit 21 with an accurate digital measurement module, determines its remaining power to generate the power storage status information, and uses the power storage status information It is provided to the charging control unit 12, so that the accuracy of the control of the first DC voltage by the charging control unit 12 is improved, and the computing load of the charging control unit 12 is reduced to improve efficiency.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above with the preferred embodiments, they are not intended to limit the present invention, and any technology familiar with the profession Personnel, without departing from the scope of the technical solution of the present invention, can use the disclosed technical content to make a few changes or modify the equivalent embodiment of equivalent changes, as long as the content of the technical solution of the present invention does not depart from, Any simple modifications, equivalent changes, and modifications made to the above embodiments by the technical essence of the invention still fall within the scope of the technical solution of the present invention.

10‧‧‧ Bidirectional Power Conversion Module

101‧‧‧first connection

102‧‧‧Second connection terminal

103‧‧‧Control terminal

11‧‧‧ Substation

12‧‧‧Charge control unit

13‧‧‧Switch unit

14‧‧‧ Converter Unit

15‧‧‧DC transformer unit

20‧‧‧ Battery Module

21‧‧‧ power storage unit

22‧‧‧Battery Management Unit

30‧‧‧Monitoring Module

40‧‧‧Grid system

FIG. 1 is a block diagram of a battery exchange station control system according to the present invention. FIG. 2 is a schematic flowchart of a method for controlling a battery exchange station according to the present invention. FIG. 3 is a block diagram of a second preferred embodiment of the battery exchange station control system of the present invention. FIG. 4 is a block diagram of a third preferred embodiment of the battery exchange station control system of the present invention. FIG. 5 is a block diagram of a fourth preferred embodiment of the battery exchange station control system of the present invention. FIG. 6 is a block diagram of a fifth preferred embodiment of the battery exchange station control system of the present invention. FIG. 7 is a block diagram of a sixth preferred embodiment of the battery exchange station control system of the present invention.

Claims (15)

A control system for a battery exchange station, which is connected to a power grid system by power supply, includes: a bidirectional power conversion module having a control terminal, a first connection terminal, and a plurality of second connection terminals, wherein the first connection terminal is electrically connected To the grid system; a plurality of battery modules, each of which is electrically connected to each of the second connection terminals of the bidirectional power conversion module; a monitoring module, which is electrically connected to a control terminal of the bidirectional power conversion module; Wherein: the monitoring module receives a power grid state information, and determines whether a power consumption state of the power grid system is a peak power state based on the power grid state information; when the monitoring module determines that the power state is the peak power state, The monitoring module generates a discharge control signal and transmits it to the control end of the bidirectional power conversion module. When the bidirectional power conversion module receives the discharge control signal, the bidirectional power conversion module is provided by each of the second connection terminals. Receiving a battery voltage of each of the battery modules, converting the battery voltage into a playback voltage, and outputting the playback voltage to the grid system from the first connection terminal The battery exchange station control system according to claim 1, wherein when the monitoring module determines that the power consumption state is a non-peak power consumption state, the monitoring module generates a charging control signal and transmits the charging control signal to the bidirectional power conversion module Control terminal of the group; when the bidirectional power conversion module receives the charging control signal, the bidirectional power conversion module receives a grid voltage of the grid system from the first connection terminal, and converts the grid voltage into a charging voltage And the charging voltage is output to each of the battery modules from each of the second connection terminals. The battery exchange station control system according to claim 2, wherein: the discharge control signal includes information on the number of reserved batteries; the bidirectional voltage conversion module controls the stopping of a first quantity based on the information on the number of reserved batteries in the discharge control signal A second connection terminal receives the battery voltage for conversion to a playback voltage. The battery exchange station control system according to claim 2, wherein the bi-directional power conversion module includes: a power conversion unit electrically connected to the first connection end and the control end; a switching unit electrically connected to the power conversion unit The control terminal and each of the second connection terminals; a charging control unit electrically connected between the power transformation unit and the switching unit; wherein: when the switching unit receives the discharge control signal, the switching unit controls each of the The second connection terminal is electrically connected to the power conversion unit; when the power conversion unit receives the discharge control signal, the power conversion unit receives the battery voltage of each of the battery modules from the second connection terminal through the switching unit, and The battery voltage is converted into the playback voltage, and the playback voltage is output to the first connection terminal. The battery exchange station control system according to claim 4, wherein: when the switching unit and the transformer unit receive the charging control signal, the switching unit controls the charging control unit to be electrically connected to each of the second connecting terminals, the The power conversion unit receives the grid voltage from the first connection end, and converts the grid voltage to a first DC voltage. When the charging control unit receives the first DC voltage, the charging control unit converts the first DC voltage to the first DC voltage. Charging voltage, and outputting the charging voltage to each of the second connection terminals through the switching unit. The battery exchange station control system according to claim 2, wherein the bidirectional power conversion module includes: a current conversion unit electrically connected to the control terminal, and includes an AC connection terminal and a DC connection terminal, and the AC connection terminal is electrically Connected to the first connection terminal; a DC converter unit electrically connected to the control terminal and the DC connection terminal of the converter unit; a switching unit electrically connected to the control terminal, the DC voltage converter unit and each of the second connection terminals A charging control unit electrically connected between the DC transformer unit and the switching unit; wherein when the switching unit, the DC transformer unit and the current transformation unit receive the discharge control signal from the control terminal, the switching The unit controls each of the second connection terminals to be electrically connected to the DC voltage conversion unit. The DC voltage conversion unit receives the battery voltage of each battery module through each of the second connection terminals, and generates a DC voltage conversion of the battery voltage. A second DC voltage, the converter unit receives the second DC voltage, and converts the second DC voltage into the playback voltage. The battery exchange station control system according to claim 6, wherein when the switching unit, the DC voltage conversion unit, and the current conversion unit receive the charging control signal, the switching unit controls the charging control unit to be electrically connected to each of the At the second connection terminal, the converter unit receives the grid voltage from the first connection terminal, rectifies the grid voltage, and outputs the rectified grid voltage to the DC transformer unit. The DC transformer unit converts the rectified grid voltage to generate A third DC voltage is output to the charging control unit; when the charging control unit receives the third DC voltage, the charging control unit converts the third DC voltage to the charging voltage and outputs the charging voltage via the switching unit To each of the second connecting ends. The battery exchange station control system according to any one of claims 4 to 7, wherein each of the battery modules includes: a power storage unit electrically connected to one of the second connection terminals; and a battery management unit electrically connected to the storage The power unit detects the voltage situation of the power storage unit and generates power storage status information. The charging control unit is electrically connected to each of the battery management units and receives the power storage status information to determine the remaining power of each battery module. Battery. The battery exchange station control system according to claim 3, wherein the bidirectional power conversion module includes: a plurality of power conversion units, which are electrically connected to the first connection end and the control end, respectively; and a switching unit connected to each of the power conversion units. Between the unit and each of the second connection terminals, and electrically connected to the control terminal; wherein: when the switching unit and each of the transformer units receive the discharge control signal, the switching unit controls each of the transformer units to be electrically connected to At one of the second connection terminals, each of the power conversion units receives the battery voltage from one of the battery modules, converts the battery voltage to the playback voltage, and outputs the playback voltage to the grid system from the first connection terminal. The battery exchange station control system according to claim 9, wherein the first number of transformer units in each of the transformer units stop receiving by the second connection terminal according to the retained battery quantity information in the discharge control signal The battery voltage is converted into a playback voltage. The battery exchange station control system according to claim 9, wherein when the switching unit and each of the power conversion units receive the charging control signal, the switching unit controls each of the power conversion units to be electrically connected to each other according to the charging control signal. One of the second connection terminals, and each transformer unit receives the grid voltage from the first connection terminal, converts the grid voltage into a first DC voltage, and outputs the first DC voltage to each of the first through the switching unit. Two connection ends. The battery exchange station control system according to claim 11, further comprising: a plurality of charging control units electrically connected between each of the power conversion units and the switching unit; wherein: when the switching unit receives the discharge control signal, the The switching unit controls each of the transformer units to be electrically connected directly to one of the second connection terminals; when the switching unit and each of the transformer units receive the charging control signal, the switching unit controls each of the charging control units to be electrically connected to One of the second connection terminals, and each of the charging control units receives the first DC voltage from one of the transformer units, converts the first DC voltage to the charging voltage, and outputs the charging voltage to one of the second connection terminals through the switching unit. . A method for controlling a battery exchange station is performed by a battery exchange station control system, and includes the following steps: receiving a state information of a power grid; whether a power consumption state is a peak power state according to the power grid state information; when it is judged as the peak power state When the power is used, a discharge control signal is generated; when the discharge control signal is generated, a plurality of battery voltages output by the plurality of battery modules are received, and each of the battery voltages is converted to generate a playback voltage, and the playback voltage is output to a grid system. The method for controlling a battery exchange station according to claim 13, further comprising the steps of: when determining that the power consumption state is a non-peak power consumption state, generating a charging control signal; when generating the charging control signal, receiving a power grid system A grid voltage is output, and the grid voltage is converted to generate a charging voltage, and the charging voltage is output to charge each of the battery modules. The battery exchange station control method according to claim 14, further comprising the following steps: stopping receiving the battery voltage by the first number of battery modules and converting the battery voltage to the playback voltage according to a reserved battery quantity information in the discharge control signal.