Starting control circuit of fixed power supply power generation system

Abstract

The utility model discloses a starting control circuit of a fixed power supply power generation system. The starting control circuit comprises a low-voltage storage battery, a low-voltage power supply main switch, an anode busbar, a cathode busbar, an emergency stop switch, a starting combination switch, a fuel cell controller FCU and a first battery, the low-voltage storage battery is connected with the low-voltage power supply main switch, the low-voltage power supply main switch is connected with the positive busbar, the positive busbar is connected with the emergency stop switch, the emergency stop switch is connected with the first control switch, the first control switch is connected with the fuel cell controller FCU, the fuel cell controller FCU is connected with the negative busbar, and the negative busbar is connected with the low-voltage storage battery. The emergency stop switch is a normally-closed switch, the first battery and the fuel battery controller are integrated to the starting combination switch, the instant starting and shutting-off functions of the power battery and hydrogen fuel battery dual system are achieved, operation procedures are reduced, and the use convenience of the emergency stop switch is greatly improved; and the dual-system operation can be simultaneously switched off in an emergency.

Description

Technical Field

[0001] The utility model relates to a starting control circuit for a fixed power supply generating system. Background Art

[0002] Fuel cell fixed power supply is a device that uses hydrogen fuel cells as the main power source to generate electricity for external electrical equipment. It consists of a fuel cell module, a DCDC converter, a high-voltage battery pack, a low-voltage battery, etc. Fuel cells have the disadvantage of slow response. Fixed power supplies are usually equipped with high-voltage battery packs to power electrical equipment alone at startup and to power the high-voltage components of the fuel cell. After the fuel cell system works normally, it supplies power to external equipment and can charge the high-voltage battery pack according to the energy control strategy. Fuel cell fixed power supply has the advantages of long battery life, no pollution, and easy use.

[0003] The usual control method of fixed power generation system is that the high-voltage battery pack and hydrogen fuel cell system are controlled separately by different control units, and information is exchanged through the CAN bus to achieve full system control. This method is susceptible to external communication interference, CAN bus data overload and other factors. In addition, the battery is required to provide starting power for the entire low-voltage system. If the system has not been running for a long time, the battery may be depleted, resulting in the inability to start automatically later. Summary of the invention

[0004] The purpose of the utility model is to provide a starting control circuit for a fixed power generation system, so as to solve the technical problem that in the prior art, the fixed power generation system is usually controlled in a manner that the high-voltage battery pack and the hydrogen fuel cell system are separately controlled by different control units, and information is exchanged through a CAN bus to achieve full system control, and a battery is required to provide starting power for the entire low-voltage system. If the system has not been running for a long time, the battery may be depleted, resulting in the subsequent inability to start autonomously.

[0005] The technical solution of the utility model is achieved in this way:

[0006] The utility model provides a fixed power supply power generation system starting control circuit, which is characterized by comprising a low-voltage battery, a low-voltage power supply main switch, a positive bus, a negative bus, an emergency stop switch, a starting combination switch, a fuel cell controller FCU and a first battery;

[0007] The starting combination switch includes a first control switch and a second control switch, the output end of the second control switch is connected to the negative electrode of the first battery, and the positive electrode of the first battery is connected to the input end of the second control switch;

[0008] The positive pole of the low-voltage battery is connected to the input end of the low-voltage power supply main switch, the output end of the low-voltage power supply main switch is connected to the input end of the positive bus, the output end of the positive bus is connected to the input end of the emergency stop switch, the output end of the emergency stop switch is connected to the input end of the first control switch, the output end of the first control switch is connected to the input end of the fuel cell controller FCU, the output end of the fuel cell controller FCU is connected to the input end of the negative bus, the output end of the negative bus is connected to the negative pole of the low-voltage battery, electrical equipment is provided between the positive bus and the negative bus, and the emergency stop switch is a normally closed switch.

[0009] A main power fuse is provided between the output end of the low-voltage battery and the input end of the low-voltage power main switch.

[0010] The first control switch mentioned above is a 24V control switch, and the second switch is a BMS signal control switch.

[0011] The above also includes a second battery, which is connected in parallel at both ends of the fuel cell controller FCU.

[0012] The first battery and the second battery mentioned above are both 48V batteries.

[0013] The electrical equipment described above includes a water pump, a first cooling fan and a second cooling fan. The input end and the output end of the water pump, the first cooling fan and the second cooling fan are respectively connected in parallel between the positive bus and the negative bus.

[0014] The above also includes a touch panel, the input end of the touch panel is connected to the positive bus, and the output end of the touch panel is connected to the negative bus.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. A fixed power supply power generation system starting control circuit, characterized in that it includes a low-voltage battery, a low-voltage power supply main switch, a positive bus, a negative bus, an emergency stop switch, a starting combination switch, a fuel cell controller FCU and a first battery; wherein the starting combination switch includes a first control switch and a second control switch, the output end of the second control switch is connected to the negative electrode of the first battery, and the positive electrode of the first battery is connected to the input end of the second control switch; the positive electrode of the low-voltage battery is connected to the input end of the low-voltage power supply main switch, the output end of the low-voltage power supply main switch is connected to the input end of the positive bus, the output end of the positive bus is connected to the input end of the emergency stop switch, and the output end of the emergency stop switch is connected to The input end of the first control switch and the output end of the first control switch are connected to the input end of the fuel cell controller FCU, the output end of the fuel cell controller FCU is connected to the input end of the negative bus, the output end of the negative bus is connected to the negative electrode of the low-voltage battery, and electrical equipment is provided between the positive bus and the negative bus. The emergency stop switch is a normally closed switch. By integrating the first battery and the fuel cell controller into the starting combination switch, the instant start-up and shutdown functions of the power battery and hydrogen fuel cell dual systems are realized, the operating procedures are reduced, and the convenience of use is greatly improved. By connecting the emergency stop switch and the starting combination switch in series, the operation of the dual systems can be shut down at the same time in an emergency.

[0017] 2. Other advantages of the utility model are described in detail in the embodiment section of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model provides a schematic diagram. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1:

[0021] like Figure 1 As shown, this embodiment provides a fixed power generation system startup control circuit, characterized in that it includes a low-voltage battery 1, a low-voltage power main switch 3, a positive bus 4, a negative bus 7, an emergency stop switch 5, a start combination switch 6, a fuel cell controller FCU 8 and a first battery 9;

[0022] The starting combination switch 6 includes a first control switch 61 and a second control switch 62, the output end of the second control switch 62 is connected to the negative electrode of the first battery 9, and the positive electrode of the first battery 9 is connected to the input end of the second control switch 62;

[0023] The positive pole of the low-voltage battery 1 is connected to the input end of the low-voltage power supply main switch 3, the output end of the low-voltage power supply main switch 3 is connected to the input end of the positive bus 4, the output end of the positive bus 4 is connected to the input end of the emergency stop switch 5, the output end of the emergency stop switch 5 is connected to the input end of the first control switch 61, the output end of the first control switch 61 is connected to the input end of the fuel cell controller FCU8, the output end of the fuel cell controller FCU8 is connected to the input end of the negative bus 7, the output end of the negative bus 7 is connected to the negative pole of the low-voltage battery 1, and an electrical device 100 is provided between the positive bus 4 and the negative bus 7. The emergency stop switch 5 is a normally closed switch. By integrating the first battery and the fuel cell controller into the starting combination switch, the instant start-up and shutdown functions of the power battery and hydrogen fuel cell dual systems are realized, the operating procedures are reduced, and the convenience of use is greatly improved. By connecting the emergency stop switch and the starting combination switch in series, the operation of the dual systems can be shut down at the same time in an emergency.

[0024] A main power fuse 2 is provided between the output end of the above-mentioned low-voltage battery 1 and the input end of the low-voltage power main switch 3. The main power fuse provides low-voltage protection for the entire low-voltage electrical equipment to prevent damage to various components in the event of leakage short circuit, and also realizes on-off control of the low-voltage power supply of the power generation system.

[0025] The first control switch 61 is a 24V control switch, and the second switch is a BMS signal control switch.

[0026] The above also includes a second battery 10, which is connected in parallel at both ends of the fuel cell controller FCU8.

[0027] The first battery 9 and the second battery 10 are both 48V batteries. The 48V battery is discharged to the outside. When the fuel cell controller FCU detects that the 48V battery pack S0C is low, the hydrogen fuel cell is started to generate electricity, and at the same time, the external device is discharged and the 48V battery S0C% is charged until the 48V battery is full. The hydrogen fuel system stops, and the 48V battery continues to discharge the external device to realize that the fixed battery system can continuously supply power to the outside. After the external device is fully charged, click the stop button on the touch panel, the hydrogen fuel system accepts the shutdown command and shuts down. When the power-on completion light on the screen is on, turn off the start combination switch and the main power switch, and the power generation system completes the shutdown operation.

[0028] The above-mentioned electrical equipment 100 includes a water pump 101, a first cooling fan 102 and a second cooling fan 103. The input end and the output end of the water pump 101, the first cooling fan 102 and the second cooling fan 103 are respectively connected in parallel between the positive bus 4 and the negative bus 7, and the structural arrangement is reasonable.

[0029] The above also includes a touch panel 11, the input end of the touch panel 11 is connected to the positive bus 4, the output end of the touch panel 11 is connected to the negative bus 7, the touch panel communicates with the fuel cell controller FCU, and a stop button is provided on the touch panel, and the power-off operation is performed by operating the stop button of the touch panel.

[0030] The method for starting and controlling the fixed power generation system of the utility model is as follows:

[0031] When starting: close the main switch of the low-voltage power supply, close the starting combination switch, the first battery supplies power to the outside, and the fuel cell controller FCU detects the SOC of the first battery. When it reaches the set value, the fuel cell module is started;

[0032] Normal shutdown: Click the stop button on the touch panel, and the fuel cell controller FCU receives the instruction to shut down the fuel cell system, disconnect the start combination switch, and disconnect the low-voltage power supply main switch;

[0033] In case of emergency shutdown, press the emergency stop switch and disconnect the main low-voltage power switch.

[0034] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A fixed power generation system startup control circuit, characterized in that: It comprises a low-voltage storage battery (1), a low-voltage power supply main switch (3), a positive busbar (4), a negative busbar (7), an emergency stop switch (5), a start combination switch (6), a fuel cell controller FCU (8) and a first battery (9); The starting combination switch (6) comprises a first control switch (61) and a second control switch (62), the output end of the second control switch (62) is connected to the negative electrode of the first battery (9), and the positive electrode of the first battery (9) is connected to the input end of the second control switch (62); The positive electrode of the low-voltage battery (1) is connected to the input end of the low-voltage power supply main switch (3), the output end of the low-voltage power supply main switch (3) is connected to the input end of the positive bus (4), the output end of the positive bus (4) is connected to the input end of the emergency stop switch (5), the output end of the emergency stop switch (5) is connected to the input end of the first control switch (61), the output end of the first control switch (61) is connected to the input end of the fuel cell controller FCU (8), the output end of the fuel cell controller FCU (8) is connected to the input end of the negative bus (7), the output end of the negative bus (7) is connected to the negative electrode of the low-voltage battery (1), an electric device (100) is provided between the positive bus (4) and the negative bus (7), and the emergency stop switch (5) is a normally closed switch.

2. A fixed power generation system startup control circuit according to claim 1, characterized in that: A power supply main fuse (2) is provided between the output end of the low-voltage storage battery (1) and the input end of the low-voltage power supply main switch (3).

3. The fixed power generation system startup control circuit according to claim 1, characterized in that: The first control switch (61) is a 24V control switch, and the second switch is a BMS signal control switch.

4. The fixed power generation system startup control circuit according to claim 1, characterized in that: The invention also comprises a second battery (10), which is connected in parallel to both ends of the fuel cell controller FCU (8).

5. A fixed power generation system startup control circuit according to claim 4, characterized in that: The first battery (9) and the second battery (10) are both 48V batteries.

6. A fixed power generation system startup control circuit according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The electrical equipment (100) comprises a water pump (101), a first cooling fan (102) and a second cooling fan (103); the input end and the output end of the water pump (101), the first cooling fan (102) and the second cooling fan (103) are respectively connected in parallel between the positive bus (4) and the negative bus (7).

7. A fixed power generation system startup controller circuit according to claim 1 or 2 or 3 or 4 or 5, characterized in that: It also comprises a touch panel (11), wherein the input end of the touch panel (11) is connected to the positive bus (4), and the output end of the touch panel (11) is connected to the negative bus (7).

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