DC power supply monitoring system

Abstract

The utility model provides a direct-current power supply monitoring system, and belongs to the field of power utilization monitoring. The DC power supply monitoring system comprises a storage battery pack module, a storage battery pack equalization module, a voltage monitoring module, a current monitoring module, a temperature monitoring module, a voltage comparison module, a current comparison module, a temperature comparison module, a switching module, a central control module, an insulation monitoring module, a switching value monitoring module and a protection module. The storage battery pack module is connected with the storage battery pack equalization module; the voltage comparison module is respectively connected with the output end of the voltage monitoring module, the switching module and the central control module; the current comparison module is respectively connected with the output end of the current monitoring module, the switching module and the central control module; the temperature comparison module is respectively connected with the output end of the temperature monitoring module, the switching module and the central control module; the central control module is connected with the insulation monitoring module, the switching value monitoring module and the protection module. The reliability of the DC power supply monitoring system can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of power monitoring, and particularly relates to a direct current power supply monitoring system. BACKGROUND

[0002] In the application scenarios of many industries, communications, electric power and the like, a direct current power supply system plays a vital role in providing stable and reliable direct current power for various devices. However, with the increasing requirements of devices on power supply stability, safety and reliability, the current direct current power supply monitoring method gradually exposes many deficiencies. The current direct current power supply monitoring system has poor current and voltage balance of the storage battery, reduces the service life of the storage battery, and is prone to danger.

[0003] Therefore, there is an urgent need for a stable and reliable direct current power supply monitoring system. CONTENT OF THE UTILITY MODEL

[0004] The present disclosure provides a direct current power supply monitoring system to solve the problem of low stability and reliability of the direct current power supply monitoring system.

[0005] The present disclosure provides a direct current power supply monitoring system, comprising: a storage battery pack module, a storage battery pack equalization module, a voltage monitoring module, a current monitoring module, a temperature monitoring module, a voltage comparison module, a current comparison module, a temperature comparison module, a switching module, a central control module, an insulation monitoring module, a switching quantity monitoring module and a protection module.

[0006] The output end of the storage battery pack module is connected with the input end of the voltage monitoring module, the input end of the current monitoring module and the input end of the temperature monitoring module respectively;

[0007] The storage battery pack module is connected with the storage battery pack equalization module;

[0008] The voltage comparison module is connected with the output end of the voltage monitoring module, the switching module and the central control module respectively;

[0009] The current comparison module is connected with the output end of the current monitoring module, the switching module and the central control module respectively;

[0010] The temperature comparison module is connected with the output end of the temperature monitoring module, the switching module and the central control module respectively;

[0011] The central control module is connected with the insulation monitoring module, the switching quantity monitoring module and the protection module respectively.

[0012] In an exemplary embodiment of the present disclosure, the storage battery pack module comprises: a plurality of storage batteries.

[0013] Each storage battery is connected with the storage battery pack equalization module;

[0014] The battery pack equalization module comprises a plurality of battery equalization units.

[0015] Each battery equalization unit is connected with each battery one by one.

[0016] In an exemplary embodiment of the present disclosure, the battery equalization unit comprises a triode Q1, a triode Q2, a MOS tube M1, a MOS tube M2, a MOS tube M3, a resistor R1, a resistor R2 and a resistor R3.

[0017] The emitter of the triode Q1 is connected with the emitter of the triode Q2, the base is connected with the collector of the triode Q1, and the collector is connected with the drain of the MOS tube through the resistor R1.

[0018] The base of the triode Q2 is connected with the base of the triode Q1, the collector of the triode Q1 and the second end of the resistor R1 respectively, and the collector is connected with the first end of the resistor R3, the gate of the MOS tube M1 and the gate of the MOS tube M2 respectively.

[0019] The emitters of the triode Q1 and the triode Q2 are used for being connected with an external power supply.

[0020] The drain of the MOS tube M1 is connected with the positive electrode of the battery, and the source is connected with the second end of the resistor R3 and the drain of the MOS tube M2 respectively.

[0021] The source of the MOS tube M2 is connected with the negative electrode of the battery.

[0022] The gate of the MOS tube M3 is used for being connected with an external power supply, and the source is connected with the first end of the resistor R2.

[0023] The second end of the resistor R2 is used for being grounded.

[0024] In an exemplary embodiment of the present disclosure, the voltage comparison module comprises a first switch, a first voltage comparator and a second voltage comparator.

[0025] The fixed terminal of the first switch is connected with the voltage monitoring module, the first moving terminal is connected with the non-inverting input terminal of the first voltage comparator, the second moving terminal is connected with the non-inverting input terminal of the second voltage comparator, and the control terminal is connected with the switching module.

[0026] The inverting input terminal of the first voltage comparator is used for receiving a first voltage reference signal, and the output terminal is connected with the central control module.

[0027] The inverting input terminal of the second voltage comparator is used for receiving a second voltage reference signal, and the output terminal is connected with the central control module.

[0028] The initial state of the first switch is connected with the first voltage comparator.

[0029] In an example embodiment of the present disclosure, the current comparison module comprises: a second switch, a first current comparator and a second current comparator.

[0030] The non-moving end of the second switch is connected with the current monitoring module, the first moving end is connected with the non-inverting input end of the first current comparator, the second moving end is connected with the non-inverting input end of the second current comparator, and the control end is connected with the switching module.

[0031] The non-inverting input end of the first current comparator is used for receiving a first current reference signal, and the output end is connected with the central control module.

[0032] The non-inverting input end of the second current comparator is used for receiving a second current reference signal, and the output end is connected with the central control module.

[0033] The initial state of the second switch is connected with the first current comparator.

[0034] In an example embodiment of the present disclosure, the temperature comparison module comprises: a first temperature comparator and a second temperature comparator.

[0035] The non-inverting input end of the first temperature comparator is used for receiving a first temperature reference signal, and the output end is connected with the switching module.

[0036] The non-inverting input end of the second temperature comparator is used for receiving a second temperature reference signal, and the output end is connected with the central control module.

[0037] In an example embodiment of the present disclosure, the DC power supply monitoring system further comprises: an alarm module.

[0038] The alarm module is connected with the central control module.

[0039] The alarm module is used for sending an alarm signal to a terminal device.

[0040] In an example embodiment of the present disclosure, the DC power supply monitoring system further comprises: a storage module.

[0041] The storage module is connected with the switching quantity monitoring module.

[0042] The storage module is configured to store data sent by the switching quantity monitoring module.

[0043] The DC power supply monitoring system provided by the example embodiment of the present disclosure has the following beneficial effects:

[0044] The present disclosure realizes all-round real-time monitoring of the direct current power supply system by integrating multiple monitoring modules such as battery pack modules, voltage monitoring modules, current monitoring modules, temperature monitoring modules, etc. This ensures that the key parameters of the power supply system such as voltage, current, temperature, etc. are always within a controllable range, improving the stability and safety of the present disclosure. The present disclosure helps to solve the problem of overall performance degradation caused by performance differences between single batteries in the battery pack and the problem of unbalanced charging and discharging voltage of the battery, which can prolong the service life of the battery pack and improve the overall efficiency of the power supply system. The present disclosure can switch different monitoring thresholds in different situations through the switching module, improving the reliability and stability of the direct current power supply monitoring system. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0046] Figure 1 is a structural schematic diagram of a direct current power supply monitoring system provided by an embodiment of the present disclosure;

[0047] Figure 2 is a structural schematic diagram of a second direct current power supply monitoring system provided by an embodiment of the present disclosure;

[0048] Figure 3 is a structural schematic diagram of a battery pack equalization unit provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] In order to make the personnel in the technical field better understand the present scheme, the technical solutions in the embodiments of the present scheme will be clearly described below in combination with the drawings in the embodiments of the present scheme. Obviously, the described embodiments are part of the embodiments of the present scheme, not all. Based on the embodiments in the present scheme, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present scheme.

[0050] The terms "include", and other any variants thereof, in the specification and claims of the present scheme and the above-mentioned drawings, refer to "include but not limited to", and are intended to cover non-exclusive inclusion, and are not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0051] The implementation of the present disclosure is described in detail below in combination with specific drawings:

[0052] Figure 1 A structural schematic diagram of a direct-current power supply monitoring system is provided for the embodiments of the present disclosure. Referring to Figure 1 The direct-current power supply monitoring system comprises a battery pack module 10, a battery pack equalization module 11, a voltage monitoring module 12, a current monitoring module 13, a temperature monitoring module 14, a voltage comparison module 15, a current comparison module 16, a temperature comparison module 17, a switching module 18, a central control module 19, an insulation monitoring module 20, a switching quantity monitoring module 21, and a protection module 22.

[0053] The output end of the battery pack module 10 is connected to the input end of the voltage monitoring module 12, the input end of the current monitoring module 13, and the input end of the temperature monitoring module 14, respectively.

[0054] The battery pack module 10 is connected to the battery pack equalization module 11.

[0055] The voltage comparison module 15 is connected to the output end of the voltage monitoring module 12, the switching module 18, and the central control module 19, respectively.

[0056] The current comparison module 16 is connected to the output end of the current monitoring module 13, the switching module 18, and the central control module 19, respectively.

[0057] The temperature comparison module 17 is connected to the output end of the temperature monitoring module 14, the switching module 18, and the central control module 19, respectively.

[0058] The central control module 19 is connected to the insulation monitoring module 20, the switching quantity monitoring module 21, and the protection module 22, respectively.

[0059] In the present embodiment, the battery pack module 10 is the energy storage part of the direct-current power supply system, which can be composed of multiple batteries 101 in series or parallel, and provides direct-current power for subsequent power-consuming devices. The battery pack equalization module 11 is configured to adjust the charge and discharge state of each battery. The voltage monitoring module 12 is configured to measure the voltage value output by the battery pack module 10 and send the measured voltage data to the voltage comparison module 15. The current monitoring module 13 is configured to measure the current value output by the battery pack module 10 and send the measured current data to the current comparison module 16. The temperature monitoring module 14 is configured to measure the temperature value of the battery pack module 10 and send the measured temperature data to the temperature comparison module 17.

[0060] The voltage comparison module 15 is configured to compare the voltage value sent by the voltage monitoring module 12 with the pre-set voltage value, and send "1" or "0" to the central control module 19. The current comparison module 16 is configured to compare the current value sent by the current monitoring module 13 with the pre-set current value, and send "1" or "0" to the central control module 19. The temperature comparison module 17 is configured to compare the temperature value sent by the temperature monitoring module 14 with the pre-set first temperature value, and send "1" or "0" to the central control module 19. The temperature comparison module 17 is also configured to compare the temperature value sent by the temperature monitoring module 14 with the pre-set second temperature value, and send "0" or "1" to the switching module 18.

[0061] The switching module 18 is configured to control the pre-set voltage value in the voltage comparison module 15 and the pre-set current value in the current comparison module 16 according to the information sent by the temperature comparison module 17.

[0062] The insulation monitoring module 20 is configured to monitor the insulation performance of the circuit in the direct current power supply system. The switching quantity monitoring module 21 is configured to monitor the quantity with switching characteristics in the direct current power supply system. The central control module 19 is configured to receive "1" to control the protection module 22 to cut off the circuit.

[0063] The voltage monitoring module 12 can be a voltage sensor, the current monitoring module 13 can be a current sensor, and the temperature monitoring module 14 can be a temperature sensor.

[0064] For example, the battery pack module 10 is composed of 48 pieces of 2V lead-acid batteries in series, with a total voltage of 96V and a capacity of 1000Ah. The first temperature value is 40℃, and the second temperature value is 50℃. The battery pack equalization module 11 monitors the voltage of each battery 101 in real time, and when the voltage difference exceeds the pre-set threshold value (such as 0.05V), the electric quantity is transferred from the battery with high voltage to the battery with low voltage to ensure the voltage balance of the entire battery pack. For example, when the voltage of a certain battery reaches 2.05V, while the voltage of other batteries is about 2.0V, the equalization module starts the equalization process.

[0065] The voltage monitoring module 12 monitors the voltage value of the battery pack module 10 as 99V, and sends the voltage information to the voltage comparison module 15. The voltage comparison module 15 compares the value with the pre-set voltage value, which is 100V, and 99V is less than 100V, and sends "0" to the central control module 19. At this time, the central control module 19 does not control;

[0066] After a period of time, the temperature comparison module 17 monitors the temperature information of the battery pack as 42℃ and sends it to the temperature comparison module 17, since 42℃ is greater than 40℃, at this time the temperature comparison module 17 sends “1” to the switching module 18, the switching module 18 controls the preset voltage value of the voltage comparison module 15 to decrease by 2℃, which becomes 98V, at this time, since 99V is greater than 98V, the temperature comparison module 17 sends “1” to the central control module 19, at this time the central control module 19 controls the protection module 22 to cut off the circuit, so as to achieve the purpose of protecting the circuit.

[0067] Alternatively, for example, the insulation monitoring module 20 monitors that an insulation fault occurs in the direct current power supply system, sends “1” to the central control module 19, at this time the central control module 19 controls the protection module 22 to cut off the circuit.

[0068] Alternatively, for example, the switching quantity monitoring module 21 monitors that the switching quantity in the direct current power supply system is abnormal, sends “1” to the central control module 19, at this time the central control module 19 controls the protection module 22 to cut off the circuit.

[0069] From the above, it can be concluded that the present disclosure realizes the real-time monitoring of the direct current power supply system in all directions by integrating the battery pack module 10, the voltage monitoring module 12, the current monitoring module 13, the temperature monitoring module 14 and other monitoring modules. This ensures that the key parameters such as voltage, current and temperature of the power supply system are always within the controllable range, thereby improving the stability and safety of the present disclosure. The present disclosure helps to solve the problem of overall performance decline caused by performance difference between single batteries in the battery pack and the problem of unbalanced charging and discharging voltage of the battery, can prolong the service life of the battery pack, and improve the overall efficiency of the power supply system. The present disclosure can switch different monitoring thresholds in different situations through the switching module 18, thereby improving the reliability and stability of the direct current power supply monitoring system.

[0070] Figure 2 FIG. 2 is a structural schematic diagram of a second direct current power supply monitoring system provided by an embodiment of the present disclosure; Figure 3 FIG. 3 is a structural schematic diagram of a battery pack equalization unit provided by an embodiment of the present disclosure. Referring to FIG. 3, Figure 2 and Figure 3 .

[0071] In an embodiment of the present disclosure, the battery pack module 10 comprises a plurality of batteries 101.

[0072] Each battery 101 is connected with the battery pack equalization module 11.

[0073] The battery pack equalization module 11 comprises a plurality of battery 101 equalization units.

[0074] Each battery equalization unit 111 is connected with each battery 101 one by one.

[0075] In an embodiment of the present disclosure, the battery equalization unit 111 comprises a triode Q1, a triode Q2, a MOS tube M1, a MOS tube M2, a MOS tube M3, a resistor R1, a resistor R2 and a resistor R3.

[0076] The emitter of the triode Q1 is connected with the emitter of the triode Q2, the base is connected with the collector of the triode Q1, and the collector is connected with the drain of the MOS tube through the resistor R1.

[0077] The base of the triode Q2 is connected with the base of the triode Q1, the collector of the triode Q1 and the second end of the resistor R1 respectively, and the collector is connected with the first end of the resistor R3, the gate of the MOS tube M1 and the gate of the MOS tube M2 respectively.

[0078] The emitters of the triode Q1 and the triode Q2 are used for connecting with an external power supply;

[0079] The drain of the MOS tube M1 is connected with the positive pole of the battery, and the source is connected with the second end of the resistor R3 and the drain of the MOS tube M2 respectively.

[0080] The source of the MOS tube M2 is connected with the negative pole of the battery.

[0081] The gate of the MOS tube M3 is used for connecting with an external power supply, and the source is connected with the first end of the resistor R2.

[0082] The second end of the resistor R2 is used for grounding.

[0083] In the embodiment, each battery equalization unit 111 is connected with each battery 101 one by one, and the charging and discharging of each battery can be monitored.

[0084] The triode Q1 and the triode Q2 together constitute a mirror current source. When each battery 101 needs battery equalization, a high level is added to the gate of the MOS tube M3, and a bias current I is generated by cooperating the source resistor R2 of the MOS tube M3. Then the current is copied through the common-source common-gate current mirror, and a voltage is generated on the resistor R3. The size of the voltage is I×R3. At this time, the MOS tube M1 and the MOS tube M2 are turned on to form a conduction resistance, and the single battery is heated and consumed to reduce the battery capacity.

[0085] The width-length ratio of MOS tube M1 and MOS tube M2 is the same, the maximum battery forging pressure is dispersed to two linear zone MOS tubes M1 and M2, so that the drain voltage of each MOS tube is greatly reduced. The size of the on-resistance generated by MOS tube M1 and MOS tube M2 changes with the change of the battery voltage, and since the width-length ratio of MOS tube M1 and MOS tube M2 is the same, the change of the battery voltage is evenly dispersed to MOS tube M1 and MOS tube M2, thereby reducing the influence of the change of the battery voltage on the balancing resistance.

[0086] From the above, the present disclosure can accurately monitor and control the charging and discharging state of each battery 101 by connecting each battery 101 to one battery balancing unit one by one, and ensure the balance of the battery pack. Through real-time monitoring and adjustment, the overall performance decline caused by the performance difference of individual batteries is avoided, and the service life of the battery pack is prolonged. When the battery needs to be balanced, by controlling the gate voltage of MOS tube M3, cooperating with the bias current I generated by resistor R2, using common-source common-gate current mirror replication current, voltage is generated on resistor R3, thereby driving MOS tube M1 and M2 to turn on, and the battery is heated and consumed to reduce its power. This control method responds quickly and has good balancing effect. The width-length ratio of MOS tube M1 and MOS tube M2 is the same, and this design makes the maximum battery voltage dispersed to two linear zone MOS tubes, reducing the drain voltage of each MOS tube. This helps to reduce the voltage stress of the MOS tube during balancing, and improves the reliability and stability of the DC power supply monitoring system.

[0087] Figure 2 is a structural schematic diagram of a second DC power supply monitoring system provided by an embodiment of the present disclosure; refer to Figure 2 .

[0088] In an embodiment of the present disclosure, the voltage comparison module 15 comprises: a first switch 151, a first voltage comparator 152 and a second voltage comparator 153;

[0089] The fixed end of the first switch 151 is connected with the voltage monitoring module 12, the first active end is connected with the same-phase input end of the first voltage comparator 152, the second active end is connected with the same-phase input end of the second voltage comparator 153, and the control end is connected with the switching module 18;

[0090] The opposite-phase input end of the first voltage comparator 152 is used for receiving a first voltage reference signal, and the output end is connected with the central control module 19;

[0091] The opposite-phase input end of the second voltage comparator 153 is used for receiving a second voltage reference signal, and the output end is connected with the central control module 19;

[0092] The initial state of the first switch 151 is connected with the first voltage comparator 152.

[0093] In an embodiment of the present disclosure, the current comparison module 16 comprises a second switch 161, a first current comparator 162 and a second current comparator 163.

[0094] The non-moving end of the second switch 161 is connected with the current monitoring module 13, the first moving end is connected with the non-inverting input end of the first current comparator 162, the second moving end is connected with the non-inverting input end of the second current comparator 163, and the control end is connected with the switching module 18.

[0095] The inverting input end of the first current comparator 162 is used for receiving a first current reference signal, and the output end is connected with the central control module 19.

[0096] The inverting input end of the second current comparator 163 is used for receiving a second current reference signal, and the output end is connected with the central control module 19.

[0097] The initial state of the second switch 161 is connected with the first current comparator 162.

[0098] In an embodiment of the present disclosure, the temperature comparison module 17 comprises a first temperature comparator 171 and a second temperature comparator 172.

[0099] The non-inverting input end of the first temperature comparator 171 is connected with the temperature monitoring module 14, the inverting input end is used for receiving a first temperature reference signal, and the output end is connected with the switching module 18.

[0100] The non-inverting input end of the second temperature comparator 172 is connected with the temperature monitoring module 14, the inverting input end is used for receiving a second temperature reference signal, and the output end is connected with the central control module 19.

[0101] In the present embodiment, considering that the temperature will affect the bearing capacity of the direct current power supply system to voltage and current, different voltage reference signals and different current reference signals are set according to different temperatures.

[0102] The first voltage comparator 152 is configured to compare the received voltage information with a pre-set first voltage reference signal, and output "0" or "1". The second voltage comparator 153 is configured to compare the received voltage information with a pre-set second voltage reference signal, and output "0" or "1".

[0103] For example, the first temperature reference signal is 40℃, the second temperature reference signal is 50℃, the first voltage reference signal is 240V, the second voltage reference signal is 230V, the first current reference signal is 60A, and the second current reference signal is 55A.

[0104] At this time, the temperature value monitored by the temperature monitoring module 14 is 35℃, which is sent to the first temperature comparator 171 and the second temperature comparator 172, the voltage value monitored by the voltage monitoring module 12 is 231V, and the current value monitored by the current monitoring module 13 is 56A, since 35℃ is less than 40℃, at this time, the switching module 18 does not perform switching action. At this time, the state of the first switch 151 is connected with the first voltage comparator 152, and the state of the second switch 161 is connected with the first current comparator 162. Since 240V is greater than 231V and 60A is greater than 56A, the first temperature comparator 171, the second temperature comparator 172, the first voltage comparator 152 and the first current comparator 162 all send “0” to the central control module 19, at this time, the central control module 19 does not act.

[0105] After a period of time, the temperature value monitored by the temperature monitoring module 14 is 45℃, which is sent to the first temperature comparator 171 and the second temperature comparator 172, the voltage value monitored by the voltage monitoring module 12 is still 231V, and the current value monitored by the current monitoring module 13 is still 56A, at this time, since 45℃ is greater than the first temperature reference signal (40℃), the first temperature comparator 171 sends “1” to the switching module 18, at this time, the switching module 18 controls the first switch 151 to connect the second voltage comparator 153 and controls the second switch 161 to connect the second current comparator 163, since 231V is greater than 230V and 56A is greater than 55A, at this time, the second voltage comparator 153 and the second current comparator 163 both send “1” to the central control module 19, at this time, the central control module 19 controls the protection module 22 to cut off the circuit, so as to achieve the protection of the circuit.

[0106] From the above, it can be concluded that the DC power supply monitoring system of the embodiment of the present disclosure can be flexibly adjusted according to the voltage and current bearing capacity under different temperature conditions by the first switch 151 and the second switch 161 and dynamically switching the reference signals of the voltage comparator and the current comparator according to the temperature monitoring result, which improves the response flexibility and accuracy of the present disclosure to different working conditions, and ensures that the system of the present disclosure can stably and reliably operate under various conditions. The present disclosure cuts off the circuit through the protection module 22, effectively prevents system damage or safety accidents caused by overvoltage and overcurrent, and improves the stability and reliability of the DC power supply monitoring.

[0107] Figure 2 FIG. 2 is a structural schematic diagram of a second DC power supply monitoring system provided by an embodiment of the present disclosure; referring to FIG. 2, Figure 2 .

[0108] In an embodiment of the present disclosure, the DC power supply monitoring system further comprises an alarm module 23.

[0109] The alarm module 23 is connected with the central control module 19.

[0110] The alarm module 23 is configured to send an alarm signal to the terminal device.

[0111] In an embodiment of the present disclosure, the direct-current power supply monitoring system further comprises a storage module 24.

[0112] The storage module 24 is connected with the switch quantity monitoring module 21.

[0113] The storage module 24 is configured to store the data sent by the switch quantity monitoring module 21.

[0114] In the embodiment, the alarm module 23 is specifically configured to send the alarm information to the terminal device after receiving the '1' sent by the central control module 19. The terminal device can be a mobile phone, a computer or the like of a direct-current power supply system manager and relevant staff.

[0115] For example, the second temperature threshold is 50 DEG C, the temperature monitoring module 14 monitors that the temperature value is 52 DEG C, and sends the value to the second temperature comparator 172, since 52 DEG C is greater than 50 DEG C, at this time the second temperature comparator 172 sends '1' to the central control module 19, at this time the central control module 19 controls the protection module 22 to cut off the circuit, and sends the alarm information to the mobile phone of the manager, and the storage module 24 stores the switch quantity information monitored by the switch quantity monitoring module 21 in the whole process, providing data for subsequent investigation.

[0116] From the above, it can be concluded that the present disclosure can quickly trigger the alarm module 23 through the central control module 19, send the alarm information to the terminal device through the alarm module 23, enhance the safety of the direct-current power supply monitoring system, and enable the manager to respond quickly and take necessary measures to prevent potential safety accidents or equipment damage. The present disclosure can store the data monitored by the switch quantity monitoring module 21 in real time through the storage module 24, which is helpful for subsequent system investigation and troubleshooting, and improves the stability and reliability of the direct-current power supply monitoring system.

[0117] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limit them; although the foregoing embodiments of the present disclosure are described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A direct current power supply monitoring system, characterized by, The application relates to a battery pack module, a battery pack equalization module, a voltage monitoring module, a current monitoring module, a temperature monitoring module, a voltage comparison module, a current comparison module, a temperature comparison module, a switching module, a central control module, an insulation monitoring module, a switching quantity monitoring module and a protection module. Output ends of the battery pack module are connected with input ends of the voltage monitoring module, input ends of the current monitoring module and input ends of the temperature monitoring module respectively. The battery pack module is connected with the battery pack equalization module. The voltage comparison module is connected with output ends of the voltage monitoring module, the switching module and the central control module respectively. The current comparison module is connected with output ends of the current monitoring module, the switching module and the central control module respectively. The temperature comparison module is connected with output ends of the temperature monitoring module, the switching module and the central control module respectively. The central control module is connected with the insulation monitoring module, the switching quantity monitoring module and the protection module respectively. The battery pack module comprises a plurality of batteries.

2. The DC power supply monitoring system of claim 1, wherein Each battery is connected with the battery pack equalization module. The battery pack equalization module comprises a plurality of battery equalization units. Each battery equalization unit is connected with each battery one by one. The battery equalization unit comprises a triode Q1, a triode Q2, MOS tubes M1, M2 and M3, resistors R1, R2 and R3.

3. The DC power monitoring system of claim 2, wherein An emitter of the triode Q1 is connected with an emitter of the triode Q2, a base is connected with a collector of the triode Q1, and a collector is connected with a drain of the MOS tube through the resistor R1. A base of the triode Q2 is connected with a base of the triode Q1, a collector of the triode Q1 and a second end of the resistor R1 respectively, and a collector is connected with a first end of the resistor R3, a gate of the MOS tube M1 and a gate of the MOS tube M2 respectively. The emitters of the triode Q1 and the triode Q2 are used for being connected with external power sources. A drain of the MOS tube M1 is connected with a positive pole of the battery, and a source is connected with a second end of the resistor R3 and a drain of the MOS tube M2 respectively. A source of the MOS tube M2 is connected with a negative pole of the battery. A gate of the MOS tube M3 is used for being connected with an external power source, and a source is connected with a first end of the resistor R2. A second end of the resistor R2 is used for being grounded. The voltage comparison module comprises a first switch, a first voltage comparator and a second voltage comparator.

4. The DC power monitoring system of claim 1, wherein, A fixed end of the first switch is connected with the voltage monitoring module, a first moving end is connected with a non-inverting input end of the first voltage comparator, a second moving end is connected with a non-inverting input end of the second voltage comparator, and a control end is connected with the switching module. A non-inverting input end of the first voltage comparator is used for receiving a first voltage reference signal, and an output end is connected with the central control module. A non-inverting input end of the second voltage comparator is used for receiving a second voltage reference signal, and an output end is connected with the central control module. ​ The initial state of the first switch is connected with the first voltage comparator.

5. The DC power monitoring system of claim 1, wherein, The current comparison module comprises a second switch, a first current comparator and a second current comparator. The non-moving end of the second switch is connected with the current monitoring module, the first moving end is connected with the non-inverting input end of the first current comparator, the second moving end is connected with the non-inverting input end of the second current comparator, and the control end is connected with the switching module. The non-inverting input end of the first current comparator is used for receiving a first current reference signal, and the output end is connected with the central control module. The non-inverting input end of the second current comparator is used for receiving a second current reference signal, and the output end is connected with the central control module. The initial state of the second switch is connected with the first current comparator.

6. The DC power monitoring system of claim 1, wherein, The temperature comparison module comprises a first temperature comparator and a second temperature comparator. The non-inverting input end of the first temperature comparator is used for receiving a first temperature reference signal, and the output end is connected with the switching module. The non-inverting input end of the second temperature comparator is used for receiving a second temperature reference signal, and the output end is connected with the central control module.

7. The DC power monitoring system of claim 1, wherein, Further comprising: an alarm module; The alarm module is connected with the central control module; The alarm module is used for sending an alarm signal to a terminal device.

8. The DC power monitoring system of claim 1, wherein, Further comprising: a storage module; The storage module is connected with the switch quantity monitoring module; The storage module is configured to store the data sent by the switch quantity monitoring module.

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