CN217545612U - Storage battery pack and direct-current bus connection state monitoring device - Google Patents
Storage battery pack and direct-current bus connection state monitoring device Download PDFInfo
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- CN217545612U CN217545612U CN202122940730.8U CN202122940730U CN217545612U CN 217545612 U CN217545612 U CN 217545612U CN 202122940730 U CN202122940730 U CN 202122940730U CN 217545612 U CN217545612 U CN 217545612U
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Abstract
The utility model discloses a storage battery and DC bus connection state monitoring devices relates to DC power supply system state monitoring technology field. The device comprises: the silicon chain type direct current bus voltage regulating module is connected to the primary side of the direct current bus in series and used for regulating the power supply voltage of the direct current bus; the storage battery shunt is connected in series in a closed loop of the storage battery and the direct current bus, and the first data acquisition unit is electrically connected with the storage battery shunt and is matched with the storage battery shunt to detect loop current in the closed loop; an integrated buzzer alarm circuit for performing a connection state anomaly alarm; a first logic circuit for triggering the integrated buzzer warning circuit. The detection device realizes the detection of the connection state of the storage battery pack by using electronic devices with single functions, has higher operation reliability, and has simple structure, low cost and easy production and implementation.
Description
Technical Field
The utility model belongs to the technical field of direct current power supply system state monitoring, especially, relate to a storage battery and direct current generating line connection status monitoring device.
Background
The transformer substation direct current power supply system is the key equipment that provides DC power supply for station equipment and secondary side equipment, direct current power supply system is usually with the station with alternating current through rectifier module, convert direct current into and give secondary side equipment power supply, but take place the alternating current unstability in the transformer substation, even when losing the power condition, can seriously influence the operation of the important equipment of station equipment in, and to the power supply of secondary side equipment, consequently can be equipped with the direct current storage battery group of parallelly connected on direct current bus, under the normal condition, direct current system is the power supply of secondary side equipment, also charge for storage battery group simultaneously, when the alternating current goes wrong in the station, storage battery group can incessantly supply direct current bus in reverse, provide the electric energy for important equipment in the station and secondary side equipment. Therefore, whether the storage battery pack is effectively connected to the direct-current bus is the key for preventing the voltage loss of the substation total station.
At present, the connection state between a storage battery pack and a direct-current bus is realized mainly by detecting the states of an output idle switch of the storage battery pack and an output fuse of the storage battery pack, but because a plurality of links exist in a closed loop of the storage battery pack and the direct-current bus, the detection of the connection state cannot be really realized only by the state detection of individual links, the states of the output idle switch of the storage battery pack and the output fuse of the storage battery pack possibly indicate that the storage battery pack is put into operation, but the storage battery pack and the direct-current bus are in a disconnected state, so that the reliability and the effectiveness are poor; in addition, the detection is carried out in a mode of on-site inspection by personnel, but the problems of long detection period, low efficiency and easy false detection caused by carelessness of inspection personnel exist.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the present invention is to provide a device for monitoring connection status of a storage battery and a dc bus, so as to solve the problems of high complexity, low detection efficiency and poor reliability of the detection system in the prior art.
In some illustrative embodiments, the device for monitoring the connection state of the storage battery pack and the direct current bus is applied to a direct current power supply system incorporating the storage battery pack, and comprises: the silicon chain type direct current bus voltage regulating module is used for being connected at the primary side of a direct current bus in series and triggering the storage battery pack to be put into operation by regulating the supply voltage of the direct current bus; the storage battery pack shunt is connected in series in a closed loop of the storage battery pack and the direct-current bus, and the first data acquisition unit is electrically connected with the storage battery pack shunt and is matched with the storage battery pack shunt to detect loop current in the closed loop; an integrated buzzer alarm circuit for performing a connection state anomaly alarm; and the first logic circuit is used for triggering the integrated buzzer warning circuit according to the loop current in the closed loop and is respectively and electrically connected with the first data acquisition unit and the integrated buzzer warning circuit.
In some optional embodiments, the silicon chain type dc bus voltage regulating module includes: the direct current contactor and a silicon chain formed by connecting at least 1 diode in series; the direct current contactor and the silicon chain are connected in parallel.
In some optional embodiments, the number of silicon chains in parallel with the dc contactor is at least 2; and each silicon chain is connected with a relay in series, and the number of diodes in each silicon chain is different.
In some optional embodiments, the diode is an MD200a1600V anti-reverse high-power diode.
In some of the alternative embodiments, the first and second electrodes may be formed from a single material, the first logic circuit is a first logic circuit.
In some optional embodiments, the device for monitoring the connection state of the storage battery pack and the dc bus further includes: the silicon chain type direct current bus voltage regulating circuit comprises a second data acquisition unit used for detecting the direct current bus power supply voltage, a third data acquisition unit used for detecting the terminal voltage of the storage battery pack and a second logic circuit used for triggering the silicon chain type direct current bus voltage regulating module to be started or closed according to the direct current bus power supply voltage, the terminal voltage of the storage battery pack and the loop current in a closed loop, wherein the second logic circuit is respectively and electrically connected with the first data acquisition unit, the second data acquisition unit and the silicon chain type direct current bus voltage regulating module.
In some optional embodiments, the device for monitoring the connection state of the storage battery pack and the dc bus further includes: the main control module is integrated with the first logic circuit and the second logic circuit, and the data acquisition module is integrated with the first data acquisition unit, the second data acquisition unit and the third data acquisition unit.
In some optional embodiments, the device for monitoring the connection state of the storage battery pack and the dc bus further includes: the device comprises a key scanning circuit used for configuring and operating the device and a display circuit used for displaying waveform data of the direct current bus and/or the storage battery pack; the key scanning circuit and the display circuit are respectively connected with the main control module.
In some optional embodiments, the key scanning circuit has at least a first key used for triggering the on/off of the silicon chain type direct current bus voltage regulating module.
In some optional embodiments, the master control module further integrates a data storage unit for recording waveform data of the dc bus and/or the storage battery pack; the key scanning circuit at least has a second key for calling the recorded waveform data and displaying through the display circuit.
In some optional embodiments, the device for monitoring the connection state of the storage battery pack and the dc bus further includes: and the power supply circuit is used for providing working voltage for the storage battery pack and the direct-current bus connection state monitoring device.
Compared with the prior art, the utility model has the advantages of as follows:
the utility model provides a monitoring devices can be under the direct current power supply system normal operating condition, through adjustment direct current generating line supply voltage, and then make storage battery put into operation, make direct current generating line and storage battery form closed circuit, whether this moment through detecting to have loop current in this closed circuit, can effectual judgement storage battery and direct current generating line's connected state. Compared with the prior art, the monitoring device can avoid the misjudgment of the monitoring of the single-link state in the prior art by detecting the whole closed loop, thereby ensuring the effectiveness of the detection; in addition, the detection device utilizes a single-function electronic device to realize the detection of the connection state of the storage battery pack, has higher operation reliability, and has simple structure, low cost and easy production and implementation.
Drawings
Fig. 1 is a structural example of a dc power supply system in the related art;
fig. 2 is a first structural example of a device for monitoring connection state between a storage battery pack and a dc bus in an embodiment of the present invention;
fig. 3 is a configuration example of a first logic circuit in the embodiment of the present invention;
fig. 4 is a second example of the structure of the device for monitoring the connection state between the storage battery pack and the dc bus in the embodiment of the present invention;
fig. 5 is a first structural example of a silicon chain type dc bus voltage regulating module in an embodiment of the present invention;
fig. 6 is a second structural example of the silicon chain type dc bus voltage regulating module in the embodiment of the present invention;
fig. 7 is a third structural example of a device for monitoring a connection state between a storage battery pack and a dc bus in an embodiment of the present invention;
fig. 8 is a configuration example of a second logic circuit in the embodiment of the present invention;
fig. 9 is a fourth example of the structure of the device for monitoring the connection state of the storage battery pack and the dc bus in the embodiment of the present invention.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. In this context, these embodiments of the invention may be referred to, individually or collectively, by the term "utility model" merely for convenience and without automatically limiting the scope of this application to any single utility model or utility model concept if more than one is in fact disclosed.
It should be noted that, in the case of no conflict, the technical features in the embodiments of the present invention may be combined with each other.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a dc power supply system in the prior art, where the dc power supply system mainly includes: the system comprises a rectification module 1, a direct current bus 6, a storage battery pack 2 and secondary side equipment 3; the rectifier module 1 and the storage battery pack 2 are both connected in parallel on the direct current bus 6; the rectifier module 1 is used for converting alternating current in a station into direct current to supply power to the direct current bus 6, the storage battery pack 2 is usually in a floating or uniform-impulse state, and when the power supply voltage on the direct current bus 6 is lower than a rated voltage, the storage battery pack is automatically put into operation to provide standby power for the direct current bus 6. In the prior art, in order to ensure the input/output control and the operation safety of the battery pack 2, a battery pack air switch 4 and a battery pack fuse 5 are generally arranged on an output line of the battery pack 2.
The method aims to solve the problem that the state of a single link of the storage battery pack is monitored insufficiently to effectively detect the connection state of the storage battery pack and a direct-current bus in the prior art; in contrast, the applicant finds that the loop current in a closed loop formed by the storage battery pack and the direct-current bus can be detected after the storage battery pack is put into operation, and if the loop current exists at the moment, the storage battery pack and the direct-current bus are in effective connection; if no loop current exists, the connection between the storage battery pack and the direct current bus is abnormal; the detection mode is to detect the state of the whole closed loop, so that the connection state between the storage battery pack and the direct current bus can be accurately judged.
Under normal conditions, however, the terminal voltage of the storage battery pack is equal to the supply voltage of the direct-current bus, and the storage battery pack does not operate. Therefore, the applicant designs that a voltage regulating module is arranged on the primary side of the direct current bus so as to regulate the power supply voltage of the direct current bus, and then the storage battery pack can be triggered to automatically put into operation under the control logic of the direct current power supply system, and at the moment, the detection means for the closed loop can be utilized to monitor the connection state of the storage battery pack and the direct current bus.
The embodiment of the utility model provides an in disclose a storage battery and direct current generating line connection status monitoring devices, specifically, as shown in fig. 2, fig. 2 is the utility model provides an in the embodiment of the utility model embodiment storage battery and direct current generating line connection status monitoring devices's structure schematic diagram; this storage battery and direct current bus connection status monitoring devices includes: the system comprises a silicon chain type direct current bus voltage regulating module 610, a storage battery pack shunt 640, a first data acquisition unit 631, a first logic circuit 621 and an integrated buzzer alarm circuit 650; the silicon chain type direct current bus voltage regulating module 610 is used for being connected in series with the primary side of the direct current bus 6, and triggering the storage battery pack 2 to be put into operation by regulating the power supply voltage of the direct current bus 6; the storage battery pack shunt 640 is used for being connected in series in a closed loop of the storage battery pack 2 and the direct current bus 6; the first data acquisition unit 631 is electrically connected to the battery pack shunt 640, and is configured to detect a loop current in a closed loop in cooperation with the battery pack shunt 640; the integrated buzzer warning circuit 650 is configured to perform a connection state abnormality warning; the first logic circuit 621 is electrically connected to the first data collecting unit 631 and the integrated buzzer warning circuit 650, respectively, and is configured to trigger the integrated buzzer warning circuit 650 according to a loop current in the closed loop.
As shown in fig. 3, the first logic circuit 621 in this embodiment at least includes one of a current comparator, a voltage comparator, a comparison circuit, an operational amplifier and an equivalent circuit, or includes an integrated control chip such as a CPU, an MCU (e.g., C51) or the like, so as to perform comparison between the detection current Ui and the set reference current Ref and generate an enable signal Ti for triggering the integrated buzzer warning circuit 650. When the voltage comparator is used as a logic circuit to execute comparison logic, the detection current can be converted into corresponding detection voltage, and then the detection voltage is judged with the set reference voltage.
In some embodiments, the voltage drop value of the silicon chain type dc bus voltage regulating module 610 in the embodiments of the present invention is a set value, so the dc bus power supply voltage regulated by the silicon chain type dc bus voltage regulating module 610 is also certain, and the voltage difference between the terminal voltage of the storage battery and the dc bus power supply voltage is substantially equal to the voltage drop value of the voltage regulating module. On the premise that the system parameters are known quantities, the magnitude of the detected current (detected voltage) is related to the parameters of the selected storage battery pack current divider 640, and the theoretical value of the detected current (detected voltage) can be calculated because the parameters of the storage battery pack current divider 640 are known; a reference current (reference voltage) can then be designed based on the theoretical value of the detected current (voltage).
Illustratively, the theoretical value of the detection voltage is 5V, the reference voltage may be designed to be 3.3V, and when the actual detection voltage is higher than 3.3V, the first logic circuit 621 outputs a low level signal that is insufficient to trigger the integrated buzzer warning circuit 650 to perform an abnormal warning, and when the actual detection voltage is lower than 3.3V, the first logic circuit 621 outputs a high level signal that may trigger the integrated buzzer warning circuit 650 to perform an abnormal warning.
The embodiment of the utility model provides an utilize electronic device such as current comparator, voltage comparator, comparison circuit, operational amplifier, treater and singlechip among the prior art to realize that first logic circuit 621 judges to the comparison of return circuit electric current to output corresponding level signal, be above-mentioned electronic device's basic function, belong to technical field person's among the prior art conventional technical means.
The embodiment of the utility model provides an in storage battery and direct current generating line connection status monitoring device be applied to the direct current power supply system who incorporates storage battery, as shown in fig. 4, fig. 4 is the embodiment of the utility model provides an in storage battery and direct current generating line connection status monitoring device's use schematic diagram.
Before using the monitoring device in the embodiment of the present invention, at first, the silicon chain type dc bus voltage regulation module 610 and the storage battery shunt 640 are installed on the corresponding link of the dc power supply system, specifically, the silicon chain type dc bus voltage regulation module 610 is connected in series to the primary side of the dc bus 6, for example, to the output line of the rectifier module 1, so as to adjust the dc bus power supply voltage (output voltage of the rectifier module); and, battery pack shunt 640 is connected in series in a closed circuit of battery pack 2 and dc bus 6, specifically, for example, in series on an output line of battery pack 2. When the monitoring device provided by the embodiment of the present invention is used, the purpose of adjusting the dc bus supply voltage is achieved by using the silicon chain type dc bus voltage regulating module 610, and the storage battery pack 2 is automatically put into operation under the current control logic of the dc supply system, so that a closed loop is theoretically formed between the dc bus 6 and the storage battery pack 2. At this time, if the dc bus 6 is effectively connected to the storage battery pack 2, a closed loop may be formed between the dc bus 6 and the storage battery pack 2, the first data acquisition unit 631 may detect a loop current, and the first logic circuit 621 does not trigger the integrated buzzer warning circuit 650 based on the loop current and the reference current. If the connection between the dc bus 6 and the storage battery pack 2 is abnormal, a closed loop cannot be formed between the dc bus 6 and the storage battery pack 2, the first data acquisition unit 631 cannot detect a loop current, and the first logic circuit 621 triggers the integrated buzzer warning circuit 650 based on the loop current and the reference current, so as to allow a person to perform maintenance.
The utility model provides a monitoring devices can be under the direct current power supply system normal operating condition, through adjustment direct current generating line supply voltage, and then make storage battery put into operation, make direct current generating line and storage battery form closed circuit, whether this moment through detecting to have loop current in this closed circuit, can effectual judgement storage battery and direct current generating line's connected state. Compared with the prior art, the monitoring device can avoid the misjudgment of the monitoring of the single-link state in the prior art by detecting the whole closed loop, and ensure the effectiveness of the detection; in addition, the detection device utilizes a single-function electronic device to realize the detection of the connection state of the storage battery pack, has higher operation reliability, simple structure and low cost, and is easy to produce and implement.
As shown in fig. 5, in some embodiments, the silicon chain dc bus voltage regulation module 610 in the embodiments of the present invention is implemented by using a switching device 611 and a silicon chain connected in parallel, and specifically, the voltage regulation module may include: a dc contactor, and a silicon chain formed by at least 1 diode 612 connected in series; and the direct current contactor and the silicon chain are connected in parallel. In the embodiment, the direct current contactor is selected as a switching device of the chain type direct current bus voltage regulating module, and compared with a common relay, the direct current contactor has the advantages that the attraction coil of the direct current contactor is electrified by direct current, so that no impact starting current exists, and the phenomenon of violent impact of an iron core cannot be generated, so that the direct current contactor is longer in service life and higher in reliability.
In a non-detection mode, the direct current contactor is in a closed state (namely the closed state of the silicon chain type direct current bus voltage regulating module 610), at the moment, the direct current contactor is equivalent to a wire for short-circuiting a silicon chain, direct current output by the rectifying module 1 completely supplies power to the direct current bus 6 through the direct current contactor, and the output voltage of the rectifying module 1 is direct current bus power supply voltage which is equal to the voltage of a storage battery pack terminal; when the monitoring device is used for detection, the direct current contactor is in an open circuit state (namely, the starting state of the silicon chain type direct current bus voltage regulating module 610), direct current output by the rectifying module 1 needs to flow through a silicon chain and then supply power to the direct current bus 6, the silicon chain forms a load at the moment, the voltage drop effect of the direct current bus power supply voltage is realized, the voltage is lower than the voltage at the end of the storage battery pack, the voltage difference is formed between the storage battery pack 2 and the direct current bus 6, and the storage battery pack 2 is automatically put into operation.
The number of the diodes 612 of the silicon chain in the embodiment of the present invention may be 1 or more, and the specific number is related to the designed voltage drop value and the diode model specification.
For the design of the voltage drop value of the silicon chain, if the voltage drop value is designed to be too large, the detection is caused to consume power resources excessively, meanwhile, the service life of the storage battery pack is influenced, and the maintenance cost of the storage battery pack is increased; if the voltage drop value is too small, the voltage drop induction difference of the direct current power supply system is influenced, the storage battery pack is not put into operation, and the detection sensitivity of loop current between the storage battery pack and the direct current bus is influenced.
Preferably, the utility model discloses can choose for use single section voltage drop 0.64V's high-power diode, realize voltage drop 1.92V through concatenating 3 festival diodes. In the embodiment, voltage drop of 1.92V is realized by connecting 3 diodes in series, so that on one hand, the detection loss of power resources can be reduced, on the other hand, the sensitivity of a direct current power supply system to the voltage drop can be ensured, the timely response of a storage battery pack is ensured, and the subsequent detection sensitivity to loop current in a closed loop is ensured.
Specifically, the diode of the silicon chain in the embodiment of the present invention can be a commercially available MD200A-1600V reverse-prevention high-power diode.
As shown in fig. 6, in some embodiments, the number of silicon chains in the silicon-chain dc bus voltage regulation module 610 connected in parallel with the dc contactor is at least 2; a relay 613 is connected in series in each silicon chain, and the number of diodes 6 in each silicon chain is different. In the embodiment, through setting silicon chains with different numbers of diodes, different voltage drops can be selected, so that the monitoring requirements of various direct current power supply systems are met, and the method is particularly suitable for direct current power supply scenes with variable rated power supply voltages.
When the silicon chain is used, the silicon chain with the corresponding voltage drop value can be selected according to the requirement, the relay in the silicon chain is kept to be connected in a closed mode, and the relays in other silicon chains are opened.
In some embodiments, the activation/deactivation of the silicon chain dc bus voltage regulation module 610 in embodiments of the present invention may be manually controlled; in still other embodiments of the present invention, the timing start/stop of the silicon chain type direct current bus voltage regulating module 610 can also be realized by selecting a direct current contactor or a time delay relay with a time delay function; in other embodiments, the silicon chain type dc bus voltage regulating module 610 may be automatically turned on/off according to the dc power supply system by setting a trigger mechanism according to parameters/states of each link of the dc power supply system.
As shown in fig. 7, in some embodiments, the device for monitoring the connection state between the storage battery pack and the dc bus according to the embodiments of the present invention may further include: a second data acquisition unit 632 for detecting the supply voltage of the dc bus, and a third data acquisition unit 633 for detecting the terminal voltage of the storage battery pack; the second data acquisition unit 632 is configured to be connected to the dc bus 6, and the third data acquisition unit 633 is configured to be connected to the battery pack 2.
In some embodiments, the device for monitoring the connection state of the storage battery pack and the dc bus in the embodiments of the present invention may further include: and a second logic circuit 622 for triggering the silicon-link dc bus voltage regulating module 610 to turn on/off according to the dc bus supply voltage, the battery pack terminal voltage, and the loop current in the closed loop, wherein the second logic circuit 622 is electrically connected to the second data acquisition unit 632, the third data acquisition unit 633, and the silicon-link dc bus voltage regulating module 610 (e.g., the dc contactor in the silicon-link dc bus voltage regulating module 610).
In some embodiments, the second logic circuit in the embodiments of the present invention may utilize any one of a current comparator, a voltage comparator, a comparison circuit, an operational amplifier and an equivalent circuit, or another integrated control chip such as a CPU processor and an MCU (e.g., a C51 single chip) to perform the above logic control.
As shown in fig. 8, the second logic circuit may include a first comparator 6221 for detecting the loop current in the closed loop, which is consistent with the principle of the first logic circuit 621 and is not repeated herein; the method can also comprise the following steps: a second comparator 6222, configured to detect whether the dc bus power supply voltage reaches the rated power supply voltage, that is, compare the detection voltage (or equivalent conversion value) with the reference voltage (that is, the rated power supply voltage, or equivalent conversion value), so as to output a high-low level signal; the method can also comprise the following steps: a third comparator 6223 for detecting whether or not the terminal voltage of the secondary battery reaches the rated supply voltage, i.e., for comparing the detection voltage (or the equivalent conversion value) with the reference voltage (i.e., the rated supply voltage, or the equivalent conversion value), thereby outputting a high-low level signal;
illustratively, the first comparator 6221 outputs a low-level signal T1 in the case where the loop current U1 is greater than the reference current Ref 1; the second comparator 6222 outputs a high-level signal T2 in the case where the detection voltage U2 is greater than the reference voltage Ref 2; the third comparator 6223 outputs a high-level signal T3 in the case where the detection voltage U3 is greater than the reference voltage Ref 3. The second logic circuit 622 may further include a not gate unit 6225, a first and gate unit 6224, and a second and gate unit 6226; the not gate unit 6225 is connected in series to the output terminal of the first comparator 6221, and is configured to convert the low level signal T1 into the high level signal T4; the input terminal of the first and gate unit 6224 is connected to the output terminals of the second comparator 6222 and the third comparator 6223, and outputs the high level signal T5 only when both the second comparator 6222 and the third comparator 6223 output the high level signals T2 and T3; the second and gate unit 6226 is connected to the output terminals of the first and gate unit 6224 and the not gate unit 6225, and outputs the high level signal T6 for triggering the silicon chain dc bus voltage regulation module 610 only on the premise that the first and gate unit 6224 and the not gate unit 6225 output the high level signals T4 and T5.
The second logic circuit in the embodiment of the present invention can be used for other equivalent combinations such as logic gate circuit and comparison circuit except the above logic unit combination relationship to realize the same function, which is not repeated herein.
As shown in fig. 9, in some embodiments, the device for monitoring the connection state between the storage battery pack and the dc bus according to the embodiments of the present invention may further include: a main control module 620 integrated with the first logic circuit 621 and the second logic circuit, and a data acquisition module 630 integrated with the first data acquisition unit 631, the second data acquisition unit, and the third data acquisition unit. Wherein, the control circuit board that host system 620 optional has CPU or MCU, like in the embodiment, adopts two MCU devices, realizes corresponding function respectively, can utilize its integrated logical operation unit to realize respectively the utility model discloses the embodiment of the utility model provides a first logic circuit 621 and the logical function of second logic circuit 622. The data acquisition module 630 may be an a/D data acquisition module integrated with a plurality of current samples and voltage samples, and preferably, the a/D data acquisition module is a successive approximation type a/D data acquisition module.
In some embodiments, the device for monitoring the connection state of the storage battery pack and the dc bus further includes: a key scanning circuit 661 for device configuration and operation, and a display circuit 662 for displaying waveform data of the dc bus and/or the battery pack; the key scanning circuit 661 and the display circuit 662 are respectively connected to the main control module 620.
In some embodiments, the device for monitoring connection status between a storage battery pack and a dc bus in the embodiments of the present invention may further include: and a key liquid crystal screen type man-machine interaction module 660 integrated with the key scanning circuit 661 and the display circuit 662, so as to realize the corresponding functions of the key scanning circuit 661 and the display circuit 662.
In some embodiments, the key scanning circuit has at least a first key for triggering the on/off of the silicon chain dc bus voltage regulation module 610. In other embodiments, the key scanning circuit may also be directly connected to the chain dc bus voltage regulating module 610, so that an operator can directly use the key scanning circuit to control the on/off of the chain dc bus voltage regulating module 610.
In some embodiments, the main control module further integrates a data storage unit for recording waveform data of the direct current bus and/or the storage battery pack; the key scanning circuit at least has a second key for calling the recorded waveform data and displaying through the display circuit.
In some embodiments, the device for monitoring the connection state of the storage battery pack and the dc bus further includes: and the power supply circuit is used for providing working voltage for the storage battery pack and the direct-current bus connection state monitoring device. The power circuit in this embodiment may include a power interface and a plurality of power conversion units, which may provide working voltages, such as 220V, 24V, 12V, 5V, 3.3V, etc., to ensure the normal operation of each device in the monitoring apparatus. In some embodiments, the power circuit in the embodiments of the present invention may provide a reference signal (voltage/current) in the first logic circuit and/or the second logic circuit.
The embodiment of the utility model provides an in still disclose a storage battery and direct current bus connection status monitoring devices, specifically, continue to refer to figure 9. This storage battery and direct current bus connection state monitoring devices is applied to the direct current power supply system who incorporates storage battery 2, includes: the system comprises a silicon chain type direct current bus voltage regulating module 610, a main control module 620, a storage battery shunt 640, a data acquisition module 630 integrated with a first data acquisition unit, a second data acquisition unit and a third data acquisition unit, a key liquid crystal screen type man-machine interaction module 660 and an integrated buzzer warning circuit 650; the silicon chain type direct current bus voltage regulating module 610, the storage battery pack shunt 640, the data acquisition module 630, the key liquid crystal screen type man-machine interaction module 660 and the integrated buzzer warning circuit 650 are respectively and electrically connected with the main control module 620; the main control module 620 selects a control circuit board with a CPU or MCU. Since the main control module 620 has a logic operation circuit, it can execute corresponding control logic.
Before the monitoring device is used, the monitoring device is assembled in a direct current power supply system, and then the following control logics are executed in a detection period through a main control module:
1) If the storage battery pack current divider 640 has loop current and the direct current bus supply voltage is equal to the storage battery pack terminal voltage (or both the direct current bus supply voltage and the storage battery pack terminal voltage reach the rated supply voltage), the storage battery pack is indicated to be put into operation and is effectively connected with the direct current bus;
2) If the storage battery pack current divider 640 has no loop current and the direct current bus supply voltage is equal to the storage battery pack terminal voltage (or both the direct current bus supply voltage and the storage battery pack terminal voltage reach the rated supply voltage), the storage battery pack is not put into operation, and the silicon chain type direct current bus voltage regulating module 610 is triggered to regulate the voltage at the moment, so that the storage battery pack is put into operation by itself; if there is a loop current in the battery pack current divider 640, it indicates that the battery pack is effectively connected to the dc bus; if the current of the circuit still does not exist in the battery pack shunt 640 at this time, the connection between the battery pack and the dc bus is abnormal, and the integrated buzzer warning circuit 650 is triggered to perform warning processing.
3) If the storage battery pack current divider 640 has no loop current, and the supply voltage of the direct current bus is not equal to the terminal voltage of the storage battery pack (or at least one of the supply voltages does not reach the rated supply voltage), it indicates that the connection between the storage battery pack and the direct current bus is abnormal, and the integrated buzzer warning circuit 650 is triggered to perform warning processing.
In some embodiments, the device for monitoring the connection state of the storage battery pack and the dc bus may further include: the power circuit is used for providing the working voltage of the device.
In some embodiments, the device for monitoring the connection state of the storage battery pack and the dc bus may further include: the shell is used for accommodating the main control module, the data acquisition module, the key liquid crystal screen type human-computer interaction module, the integrated buzzer warning circuit and the power supply circuit. The surface of the shell is provided with a first interface for realizing the electric connection of the main control module and the silicon chain type direct current bus voltage regulating module, a second interface for realizing the electric connection of a data acquisition electrode circuit and the data acquisition module, a third interface for realizing the connection of a power circuit with an external power supply and a fourth interface for realizing the data interaction between the main control module and the mobile storage device; in addition, at least the key part and the display part in the key liquid crystal screen type man-machine interaction module are positioned on the surface of the shell.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
Claims (10)
1. A storage battery pack and DC bus connection state monitoring device is applied to a DC power supply system incorporating a storage battery pack, and comprises:
the silicon chain type direct current bus voltage regulating module is used for being connected at the primary side of the direct current bus in series and triggering the storage battery pack to be put into operation by regulating the power supply voltage of the direct current bus;
the storage battery pack shunt is connected in series in a closed loop of the storage battery pack and the direct-current bus, and the first data acquisition unit is electrically connected with the storage battery pack shunt and is matched with the storage battery pack shunt to detect loop current in the closed loop;
an integrated buzzer alarm circuit for executing abnormal alarm of connection state;
and the first logic circuit is used for triggering the integrated buzzer warning circuit according to the loop current in the closed loop and is respectively electrically connected with the first data acquisition unit and the integrated buzzer warning circuit.
2. The device for monitoring the connection state of the storage battery pack and the direct current bus according to claim 1, wherein the silicon chain type direct current bus voltage regulating module comprises:
the direct current contactor and a silicon chain formed by connecting at least 1 diode in series; and the direct current contactor and the silicon chain are connected in parallel.
3. The device for monitoring the connection state of the storage battery pack and the direct current bus according to claim 2, wherein the number of the silicon chains connected in parallel with the direct current contactor is at least 2; and each silicon chain is connected with a relay in series, and the number of diodes in each silicon chain is different.
4. The device for monitoring the connection state of the storage battery pack and the direct current bus as claimed in claim 2 or 3, wherein the diode is an MD200A1600V anti-reverse high-power diode.
5. The battery pack and dc bus connection state monitoring device according to claim 1, further comprising:
the second data acquisition unit is used for detecting the power supply voltage of the direct current bus;
the third data acquisition unit is used for detecting the terminal voltage of the storage battery pack; and (c) a second step of,
and the second logic circuit is used for triggering the silicon chain type direct current bus voltage regulating module to be started/closed according to the direct current bus power supply voltage, the storage battery pack terminal voltage and the loop current in the closed loop, and is respectively and electrically connected with the first data acquisition unit, the second data acquisition unit and the silicon chain type direct current bus voltage regulating module.
6. The battery pack and dc bus connection state monitoring device according to claim 5, further comprising: the main control module is integrated with the first logic circuit and the second logic circuit, and the data acquisition module is integrated with the first data acquisition unit, the second data acquisition unit and the third data acquisition unit.
7. The battery pack and dc bus connection state monitoring device according to claim 6, further comprising: the display circuit is used for displaying waveform data of the direct current bus and/or the storage battery pack; the key scanning circuit and the display circuit are respectively connected with the main control module.
8. The device for monitoring the connection state of the storage battery pack and the direct current bus according to claim 7, wherein at least a first button for triggering the on/off of the silicon chain type direct current bus voltage regulating module exists in the button scanning circuit.
9. The device for monitoring the connection state of the storage battery pack and the direct current bus according to claim 7, wherein the main control module is further integrated with a data storage unit for recording waveform data of the direct current bus and/or the storage battery pack;
the key scanning circuit at least has a second key for calling the recorded waveform data and displaying through the display circuit.
10. The apparatus for monitoring a connection state between a battery pack and a dc bus according to claim 1, further comprising: and the power supply circuit is used for providing working voltage for the storage battery pack and the direct-current bus connection state monitoring device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122940730.8U CN217545612U (en) | 2021-11-26 | 2021-11-26 | Storage battery pack and direct-current bus connection state monitoring device |
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| CN202122940730.8U CN217545612U (en) | 2021-11-26 | 2021-11-26 | Storage battery pack and direct-current bus connection state monitoring device |
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| CN217545612U true CN217545612U (en) | 2022-10-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116759664A (en) * | 2023-06-06 | 2023-09-15 | 国网江苏省电力有限公司泰州供电分公司 | Online capacity checking device and method for storage battery pack |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116759664A (en) * | 2023-06-06 | 2023-09-15 | 国网江苏省电力有限公司泰州供电分公司 | Online capacity checking device and method for storage battery pack |
| CN116759664B (en) * | 2023-06-06 | 2024-01-09 | 国网江苏省电力有限公司泰州供电分公司 | Online capacity checking device and method for storage battery pack |
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