CN209963808U - Electric equipment control circuit and electric equipment control system - Google Patents
Electric equipment control circuit and electric equipment control system Download PDFInfo
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- CN209963808U CN209963808U CN201921167922.6U CN201921167922U CN209963808U CN 209963808 U CN209963808 U CN 209963808U CN 201921167922 U CN201921167922 U CN 201921167922U CN 209963808 U CN209963808 U CN 209963808U
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Abstract
The utility model discloses an electrical equipment control circuit and electrical equipment control system, electrical equipment control circuit includes that group battery, switch circuit, two-way power supply converting circuit, control circuit and direct current are female arranges, the first end of group battery with switch circuit's first end is connected, switch circuit's second end with two-way power supply converting circuit's first end is connected, two-way power supply converting circuit's second end warp direct current female arranging with electrical equipment connects, control circuit's input with the second end of group battery is connected, control circuit's first output with switch circuit's controlled end is connected, control circuit's second output with two-way power supply converting circuit's controlled end is connected. The technical scheme of the utility model, can solve the group battery and overflow the problem, improve the life of group battery.
Description
Technical Field
The utility model relates to an electrical equipment technical field, in particular to electrical equipment control circuit and electrical equipment control system.
Background
At present, the power device of the RTG electric equipment used by wharf enterprises often directly connects the battery pack with the direct-current busbar, so that the battery pack is easily influenced by charging and discharging current and relevant impact. The battery pack power supply mode of the power device of the traditional RTG electric equipment has the following defects: 1. the battery pack is directly connected with the direct-current bus bar, and discharge and feedback current are not controlled, so that the overcurrent phenomenon is easily caused, and the service life of the battery pack is influenced; 2. the battery pack needs to be configured according to the voltage of the direct-current busbar, so that the waste of the capacity of the battery pack can be caused; 3. when the residual electric quantity of the battery pack is different, the voltage on the direct-current busbar is different, so that the voltage fluctuation of the direct-current busbar is large.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electrical equipment control circuit and electrical equipment control system aims at solving because the group battery is direct to be connected with the female row of direct current, leads to the group battery to overflow the problem.
In order to achieve the above object, the utility model provides an electric equipment control circuit, electric equipment control circuit includes that group battery, switch circuit, two-way power supply converting circuit, control circuit and direct current are female arranges, the first end of group battery with switch circuit's first end is connected, switch circuit's second end with two-way power supply converting circuit's first end is connected, two-way power supply converting circuit's second end warp direct current female arranging with electric equipment connects, control circuit's input with the second end of group battery is connected, control circuit's first output with switch circuit's controlled end is connected, control circuit's second output with two-way power supply converting circuit's controlled end is connected.
Optionally, the control circuit includes a battery management system, a switch control circuit, a main controller and an auxiliary controller, a detection end of the battery management system is an input end of the control circuit, and an output end of the battery management system is connected with an input end of the main controller; the first output end of the main controller is connected with the input end of the switch control circuit, and the output end of the switch control circuit is the first output end of the control circuit; and the second output end of the main controller is connected with the input end of the auxiliary controller, and the output end of the auxiliary controller is the second output end of the control circuit.
Optionally, the electric device control circuit further includes a first conversion circuit, an input end of the first conversion circuit receives an ac power signal, and an output end of the first conversion circuit is connected to the dc bus bar.
Optionally, the electric device control circuit further includes a second conversion circuit, an input end of the second conversion circuit is connected to the dc bus bar, and an output end of the second conversion circuit is connected to an auxiliary device of the electric device.
Optionally, the bidirectional power conversion circuit is a bidirectional DC-DC converter.
Optionally, the first conversion circuit is an AC-DC converter.
Optionally, the second conversion circuit is a DC-AC converter.
Optionally, when the voltage signal of the dc bus is greater than the set voltage of the bidirectional power conversion circuit, the bidirectional power conversion circuit operates in a charging mode; when the voltage signal of the direct-current busbar is less than or equal to the set voltage of the bidirectional power supply conversion circuit, the bidirectional power supply conversion circuit works in a discharging mode.
In order to achieve the above object, the present invention further provides an electric equipment control system, which includes the electric equipment control circuit as described above.
The technical scheme of the utility model, through setting up the two-way power supply converting circuit, utilize the two-way power supply converting circuit to have the characteristics of current-limiting, step up and steady voltage, make the discharge and repayment current of group battery receive the control of two-way power supply converting circuit, avoided the group battery to overflow the phenomenon, greatly improved the life of group battery; the capacity of the battery pack can be configured according to actual needs, and waste of the capacity of the battery pack is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a block diagram of an embodiment of the control circuit of the electric device of the present invention;
FIG. 2 is a block diagram of an embodiment of the control circuit of FIG. 1;
fig. 3 is a block diagram of another embodiment of the control circuit of the electric device of the present invention.
The reference numbers illustrate:
| 10 | |
20 | |
| 30 | Bidirectional power |
40 | |
| 50 | |
60 | Electric equipment |
| 70 | |
80 | |
| 90 | |
501 | |
| 502 | |
503 | |
| 504 | Main controller |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an electrical equipment control circuit.
Referring to fig. 1, the electrical device control circuit includes a battery pack 10, a switch circuit 20, a bidirectional power conversion circuit 30, a control circuit 50, and a dc bus bar 40, a first end of the battery pack 10 is connected to a first end of the switch circuit 20, a second end of the switch circuit 20 is connected to a first end of the bidirectional power conversion circuit 30, a second end of the bidirectional power conversion circuit 30 is connected to the electrical device 60 via the dc bus bar 40, an input end of the control circuit 50 is connected to a second end of the battery pack 10, a first output end of the control circuit 50 is connected to a controlled end of the switch circuit 20, and a second output end of the control circuit 50 is connected to a controlled end of the bidirectional power conversion circuit 30.
The battery pack 10, which may be a lithium battery pack, is used to supply power for normal operation of the electric device. The electric equipment 60 may be selected from RTG (rubber-tired gantry crane) all-electric equipment.
The bidirectional power conversion circuit 30 may be a bidirectional DC-DC converter, and the bidirectional DC-DC converter adopts a BUCK/BOOST circuit topology. The bidirectional DC-DC converter is configured to boost the voltage of the battery pack 10 and output the boosted voltage to the DC bus 40 when the battery pack 10 supplies power to the RTG electric device 60, so that the RTG electric device 60 can work normally; when energy is fed back to the dc busbar 40 from the RTG electric device 60, the charging current of the battery pack 10 is limited within a certain current range, so as to prevent the battery pack 10 from overcurrent and ensure the service life of the battery pack 10.
The control circuit 50 may be formed by various sensors, such as a temperature sensor, a voltage sensor, a current sensor, and at least one controller, and the control circuit 50 is configured to detect status information of the battery pack 10, where the status information may include remaining power, a voltage signal, a current signal, a temperature, and the like of the battery pack 10, and perform corresponding operations according to the detected status information, for example, when an operating temperature of the battery pack 10 is greater than a temperature threshold, the control circuit 20 is controlled to be turned off.
The switching circuit 20 has two states of off and on, and may be constituted by a disconnecting link, a circuit breaker, a control switch, and the like.
Specifically, when the battery pack 10 is in a normal state and the RTG electric device 60 hangs a box or walks a bus, the voltage of the DC bus 40 is pulled low, the bidirectional DC-DC converter operates in a discharging mode, and the bidirectional DC-DC converter boosts a voltage signal output by the battery pack 10 and outputs the boosted voltage signal to the DC bus 40 to provide electric energy for the RTG electric device 60. When the RTG electric equipment 60 brakes or is released, the voltage of the direct-current busbar 40 is increased, the bidirectional DC-DC converter works in a charging mode, the braking energy of the RTG electric equipment 60 is converted into electric energy, the battery pack 10 is charged through the bidirectional DC-DC converter, the residual electric quantity of the battery pack 10 is gradually increased in the charging process of the battery pack 10, and when the residual electric quantity of the battery pack 10 reaches the set upper limit value, the battery pack 10 is stopped to be continuously charged. That is, the bidirectional DC-DC converter has a bidirectional conversion function, and can boost the voltage signal output by the battery pack 10 and output the boosted voltage signal to the DC bus 40 to supply power to the RTG electric device 60; the braking energy of the RTG electric device 60 may also be recovered to the battery pack 10. The bidirectional DC-DC converter comprises a charging mode and a discharging mode, a set voltage is preset in the bidirectional DC-DC converter, and if the bidirectional DC-DC converter detects that the voltage of the direct-current busbar 40 is greater than the set voltage, the bidirectional DC-DC converter works in the charging mode; if the bidirectional DC-DC converter detects that the voltage signal of the DC bus 40 is less than or equal to the set voltage, the bidirectional DC-DC converter operates in the discharging mode, that is, the bidirectional power conversion circuit 30 automatically switches its operating mode by detecting the voltage of the DC bus 40.
In this embodiment, the maximum current value output by the bidirectional DC-DC converter may be set by the control circuit 50 according to the actual working condition of the RTG electric device 60, so that the charging and discharging current of the battery pack 10 is limited by the maximum current value of the bidirectional DC-DC converter, thereby avoiding the overcurrent of the battery pack 10 and ensuring the service life of the battery pack 10. Moreover, since the bidirectional DC-DC converter has the voltage boosting and stabilizing functions, the capacity of the battery pack 10 can be configured according to actual needs, and waste of the capacity of the battery pack 10 is avoided.
Further, the state information of the battery pack 10 may be detected by the control circuit 50 in real time, or at regular time, or at a single time, wherein the state information of the battery pack 10 may be detected by various sensors built in the control circuit 50, and the switching circuit 20 is controlled to perform corresponding operations according to the detected state information; for example, if the control circuit 50 detects that the temperature of the battery pack 10 is higher than the temperature threshold stored in the storage device of the control circuit 50, the control circuit 50 controls the switch circuit 20 to be turned off to protect the circuit and improve the safety of the circuit.
The technical scheme of the utility model, through setting up bidirectional power supply converting circuit 30, utilize bidirectional power supply converting circuit 30 to have the current-limiting, step up and steady voltage's characteristics, can make discharging and repayment electric current of group battery 10 controlled by bidirectional power supply converting circuit 30, avoided group battery 30 to overflow the phenomenon, can also dispose the capacity of group battery 10 according to actual need, avoid the waste of group battery 10 capacity.
Referring to fig. 2, in an embodiment, the control circuit 50 includes a battery management system 501, a switch control circuit 502, a main controller 504 and an auxiliary controller 503, a detection terminal of the battery management system 501 is an input terminal of the control circuit 50, and an output terminal of the battery management system 501 is connected to an input terminal of the main controller 504; a first output end of the main controller 504 is connected to an input end of the switch control circuit 502, and an output end of the switch control circuit 502 is a first output end of the control circuit 50; a second output terminal of the main controller 504 is connected to an input terminal of the auxiliary controller 503, and an output terminal of the auxiliary controller 503 is a second output terminal of the control circuit 50.
The battery management system 501 may include various sensors and processors, for example, a temperature sensor, a humidity sensor, a voltage sensor, a current sensor, and a processor, and is configured to detect the remaining power, temperature, voltage, and current of the battery pack 10 and send the detected data to the main controller 504.
The main controller 504 can be a microprocessor such as a single chip microcomputer, a PLC, a DSP and an FPGA; the main controller 504 may be integrated with an ADC module, or may be integrated with a software program for analyzing and processing received data of the battery pack 10. The received status information is analyzed by running or executing software programs and modules stored in the memory of the main controller 504, so that corresponding control signals are generated and output to the switch control circuit 502 and the auxiliary controller 503.
The switch control circuit 502 may be implemented by a circuit composed of a processor, and is configured to receive a control signal output by a first output terminal of the main controller 504, and control the switch circuit 20 to be turned on or off according to the received control signal.
The auxiliary controller 503 may be a microprocessor such as a single chip, a PLC, a DSP, or an FPGA; the auxiliary controller 503 is configured to receive the control signal output by the second output terminal of the main controller 504, set the voltage value and the current value output by the bidirectional power conversion circuit 30 according to the received control signal, and set the setting voltage of the bidirectional power conversion circuit 30.
Specifically, the battery management system 501 detects the state information of the battery pack 10 in real time, at regular time or at a single time, wherein the state information may include the remaining capacity of the battery pack, a voltage signal, a current signal, a temperature, etc., and uploads the detected state information of the battery pack 10 to the main controller 504. The main controller 504 analyzes and processes the received status information by running software programs and modules in the memory, and generates corresponding control signals to the switch control circuit 502 and the auxiliary controller 503 to control the switch control circuit 502 and the auxiliary controller 503 to perform corresponding operations. For example, if the battery management system 501 detects that the temperature of the battery pack 10 is higher than the temperature threshold stored in the storage device of the main controller 504, at this time, the main controller 504 outputs a control signal to the switch control circuit 502, and the switch control circuit 502 controls the switch circuit 20 to be turned off, so as to protect the circuit and improve the safety of the circuit. The switching circuit 20 and the bidirectional DC-DC converter are respectively controlled by the switching control circuit 502 and the auxiliary controller 503 in a one-to-one correspondence to reduce the load of the main controller 504, and the circuit design is simple.
Referring to fig. 3, in an embodiment, the electrical device control circuit further includes a first conversion circuit 70, an input end of the first conversion circuit 70 receives an ac power signal, and an output end of the first conversion circuit 70 is connected to the dc bus bar 40.
Optionally, the first conversion circuit 70 is an AC-DC converter, and the AC-DC converter is configured to receive an AC power signal, where the AC power signal may be mains power, convert the received AC power signal into a DC power signal, output the DC power signal through the DC busbar 40, and supply power to the RTG electric device 60, or charge the battery pack 10 through the bidirectional DC-DC converter. The AC-DC converter and the battery pack 10 can independently support the operation of the RTG electric device 60, or both can support the operation of the RTG electric device 60. Further, when the remaining capacity of the battery pack 10 is lower than the set lower limit value, the DC power signal output by the AC-DC converter may charge the battery pack through the bidirectional DC-DC converter. By providing the AC-DC converter, once the battery pack fails, the AC-DC converter can convert the commercial power into direct current to supply power to the RTG electric equipment 60, or when the RTG electric equipment 60 is not operated and the remaining power of the battery pack 10 is lower than a set lower limit value, the AC-DC converter can convert the commercial power into direct current to charge the battery pack 10.
Referring to fig. 3, in an embodiment, the electrical device control circuit further includes a second conversion circuit 80, an input end of the second conversion circuit 80 is connected to the dc bus bar 40, and an output end of the second conversion circuit 80 is connected to an auxiliary device 90 of the electrical device.
The second conversion circuit 80 may be a DC-AC converter, and is configured to convert a DC voltage signal of the DC busbar into an AC voltage signal and supply power to the auxiliary device 90. The auxiliary equipment can be fans, air conditioners, lighting lamps, etc. on the RTG electric equipment 60. So set up, need not external alternating current signal for auxiliary assembly 90 power supplies, the practicality is strong.
The utility model also provides an electric equipment control system, electric equipment control system includes as above electric equipment control circuit. The detailed structure of the control circuit of the electric device can refer to the above embodiments, and is not described herein; it can be understood that, because the utility model discloses an above-mentioned electric equipment control circuit has been used among the electric equipment control system, consequently, the utility model discloses electric equipment control system's embodiment includes all technical scheme of the whole embodiments of above-mentioned electric equipment control circuit, and the technological effect that reaches is also identical, no longer gives details here.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (9)
1. The utility model provides an electric equipment control circuit, its characterized in that, electric equipment control circuit includes that group battery, switch circuit, two-way power supply converting circuit, control circuit and direct current are female arranges, the first end of group battery with switch circuit's first end is connected, switch circuit's second end with two-way power supply converting circuit's first end is connected, two-way power supply converting circuit's second end warp direct current female arrange with electric equipment connects, control circuit's input with the second end of group battery is connected, control circuit's first output with switch circuit's controlled end is connected, control circuit's second output with two-way power supply converting circuit's controlled end is connected.
2. The electrical equipment control circuit of claim 1, wherein the control circuit comprises a battery management system, a switch control circuit, a main controller, and an auxiliary controller, wherein a detection terminal of the battery management system is an input terminal of the control circuit, and an output terminal of the battery management system is connected to an input terminal of the main controller; the first output end of the main controller is connected with the input end of the switch control circuit, and the output end of the switch control circuit is the first output end of the control circuit; and the second output end of the main controller is connected with the input end of the auxiliary controller, and the output end of the auxiliary controller is the second output end of the control circuit.
3. The electrical equipment control circuit of claim 2, further comprising a first switching circuit, an input of the first switching circuit receiving an ac power signal, an output of the first switching circuit being coupled to the dc bus.
4. The electrical equipment control circuit of claim 3, further comprising a second switching circuit, wherein an input of the second switching circuit is connected to the DC bus bar, and an output of the second switching circuit is connected to an auxiliary device of the electrical equipment.
5. The electrical equipment control circuit of claim 1, wherein the bidirectional power conversion circuit is a bidirectional DC-DC converter.
6. The electrical equipment control circuit of claim 3, wherein the first conversion circuit is an AC-DC converter.
7. The electrical equipment control circuit of claim 4, wherein the second conversion circuit is a DC-AC converter.
8. The electrical equipment control circuit according to any one of claims 1 to 7, wherein when the voltage signal of the direct current bus bar is greater than the set voltage of the bidirectional power conversion circuit, the bidirectional power conversion circuit operates in a charging mode; when the voltage signal of the direct-current busbar is less than or equal to the set voltage of the bidirectional power supply conversion circuit, the bidirectional power supply conversion circuit works in a discharging mode.
9. An electrically operated device control system, characterized in that it comprises an electrically operated device control circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921167922.6U CN209963808U (en) | 2019-07-23 | 2019-07-23 | Electric equipment control circuit and electric equipment control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921167922.6U CN209963808U (en) | 2019-07-23 | 2019-07-23 | Electric equipment control circuit and electric equipment control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209963808U true CN209963808U (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921167922.6U Active CN209963808U (en) | 2019-07-23 | 2019-07-23 | Electric equipment control circuit and electric equipment control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209963808U (en) |
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2019
- 2019-07-23 CN CN201921167922.6U patent/CN209963808U/en active Active
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