CN112198830A - DC emergency evacuation lighting centralized control power supply system - Google Patents
DC emergency evacuation lighting centralized control power supply system Download PDFInfo
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Abstract
The invention discloses a direct-current emergency evacuation lighting centralized control power supply system which comprises a main board, wherein an external alternating-current input unit, a first auxiliary power supply, a second auxiliary power supply, a battery/control unit, a first path control unit, a second path control unit, a first path output unit, a voltage stabilizing circuit 5V unit, a communication unit, a temperature acquisition unit, a dry contact point unit, a total fault alarm unit, a control and related circuit unit, a battery inspection unit, a voltage and current signal processing unit and a battery management unit are arranged on the main board, the external alternating-current input unit is divided into two paths, a fan, an on/off/power-on module and a man-machine interaction unit are arranged on the periphery of the main board, the functional units are optimized on one PCB, connecting wires are few, and the scientific layout is realized; the battery management function is complete; the protection function is complete; compared with the existing DC emergency evacuation lighting centralized control power supply system, the production cost is saved by more than 50%.
Description
Technical Field
The invention relates to a control power supply system, in particular to a direct-current emergency evacuation lighting centralized control power supply system.
Background
The fire-fighting emergency evacuation lighting technology is an important lifesaving evacuation technology which is valued by various countries, has a development history for many years and ensures the life safety of personnel when relating to building fire. Fire emergency lighting includes both lighting and signage lighting. In recent years, with the rapid development of lighting technology, large and complex intelligent buildings are increased, fire emergency lighting laws and standards are continuously perfected and perfected, fire emergency lamp products are continuously increased in variety, performance is continuously improved, technical level is greatly improved, and the fire emergency lamp is widely applied and developed. The fire-fighting emergency evacuation lighting technology in Europe and America and other countries develops earlier and faster and is in the leading position, and although China starts late, the development is also fast.
The storage battery power supply mode is mainly applied in two modes, namely independent power supply, namely that each emergency lamp is provided with a standby storage battery, and the standby power supply is automatically started when a normal power supply is cut off; the other type is centralized power supply, the emergency lamp is not provided with a power supply, and when the normal lighting power supply fails, a special centralized emergency power supply (storage battery) supplies power. We now make some comparisons between these two emergency power modes.
A. System reliability
The emergency lamp in the form has a large number of electronic components such as voltage transformation, voltage stabilization, charging, inversion, storage batteries and the like in each lamp, the number of the electronic components in the whole emergency lighting system is more, and a large number of fault hidden dangers exist in the form. However, the emergency lamp with the spare storage battery generally only affects the lamp when in fault, and the influence on the whole system is little.
In the centralized emergency lighting system, all complex electronic circuits in the lamps are omitted, and only a centralized power supply part is provided with vulnerable electronic elements, so that the working environment is ideal. The centrally powered emergency lighting system is therefore much more reliable in terms of failure rate alone. However, the failure of the centralized power supply type emergency lighting system, such as a power supply part, will affect the whole system.
B. Service life
The emergency lamp is independent, a normal power supply of the emergency lamp is connected with a common lighting power supply loop, and a battery needs to be charged and discharged when the emergency lamp is used, overhauled and broken down. Moreover, due to the size and price, the charging and discharging circuit in a common lamp is designed as simply as possible, and a good technical performance index is difficult to achieve. In addition, most of the time of the emergency lamp is in a working state, the internal temperature of the emergency lamp is high, and the emergency lamp can adversely affect the storage battery and shorten the service life of the storage battery, so that the service life of the emergency lamp is affected.
The situation of the centralized emergency lighting system in the form is just opposite to that of the above, the whole system adopts an independent power supply, the storage battery is started only when the normal lighting power supply fails, and the purposes of protecting and controlling the charge-discharge period of the storage battery and the like can be achieved by adopting a more precise technology due to the fact that only one set of power supply equipment is provided. Moreover, the system power supply and the storage battery part are generally placed in a special room, and the environmental temperature is easily controlled in a range favorable for the work of the power supply and the storage battery, so that the service life of the storage battery in the centralized power supply type emergency lighting system is greatly longer than that of an independent power supply emergency lamp.
C. Maintenance and management
The emergency lighting system is independent, because the emergency lamps are distributed at all positions in a building and powered by an alternating current power supply at ordinary times, even if a direct current standby power supply part fails, the emergency lighting system is difficult to find at ordinary times, the internal circuits of the emergency lighting system are complex, the number of components is large, the maintenance workload is large, and if a disaster occurs, the emergency lighting system does not have an emergency function because the standby power supply part fails to find in time.
The centralized power supply type emergency lighting system places a complex electronic circuit in a special room, and the emergency lighting lamp is not different from a common lamp, so that a common electrician can maintain the lamp. Moreover, with the development of modern technology, many manufacturers produce centralized emergency power supplies with automatic detection functions, and even through the communication interfaces of computers, the centralized emergency power supplies can send signals to the host computer and monitor and manage the signals by the computers. Even if computer management is not set in the system, the system is still provided with a monitoring system, and when the power supply fails or is about to be exhausted, sound and light alarm is given out, so that the workload of system maintenance and management is greatly reduced.
D. Price of system
In a centralized mode, on the contrary to the above, because a whole set of voltage reduction, voltage stabilization, charging, storage battery and other components in each emergency lamp are omitted, the emergency lamp can be a common lamp, the whole system is only provided with one set of the device at the position of the centralized emergency power supply, and if the capacity of the storage battery can be fully utilized, the cost of the system can be greatly reduced.
E. Line laying
Independent type, each emergency lamp is internally provided with a standby power supply (storage battery), so that no special requirement can be imposed on a power supply line, and the standby power supply cannot be influenced by the fault of the power supply line when a disaster happens.
In a centralized mode, on the contrary, each emergency lamp is not provided with a standby power supply (storage battery), and if a power supply line fails when a disaster happens, the normal operation of an emergency lighting system can be directly influenced, so that necessary fire prevention measures need to be taken when the power supply line is laid, and the following fire prevention measures are generally adopted:
a. the cable is protected by a steel tube and is hidden in a non-combustion body structure, and the thickness of a protective layer is not less than 30 mm;
b. when the cable needs to be laid clearly, the cable is protected by penetrating through the steel pipe, and fireproof paint is brushed or other fireproof measures are adopted outside the steel pipe;
c. the circuit adopts fireproof cables or fire-resistant cables and wires.
F. Power management
Because the functions of buildings are more and more complex, a plurality of units exist in one building, the electricity consumption metering is an important aspect in the property management of the building, and the power supply modes of the two storage batteries are different.
The emergency lamps are provided with standby power supplies, and the common power supply can be obtained from a nearby normal lighting distribution box, so that the power consumption of each emergency lamp is easily classified into respective power consumption units, and no trouble is caused in metering.
The whole system only has one set of storage battery as a standby power supply, and the electricity consumption of all emergency lamps is connected with the centralized storage battery device, so when a plurality of units (especially a plurality of units in the same floor) exist in a building, the electricity consumption of emergency lighting cannot be counted into each unit, and although the electricity consumption is not too large, unnecessary disputes can be caused.
The development and application of the building fire-fighting emergency evacuation lighting technology have been paid attention by many countries in the world, and remarkable results are achieved. However, compared with the market demand and the social and economic development requirements, the development of the building fire-fighting emergency evacuation lighting technology cannot completely meet the actual and future demands, and the problems to be researched and solved are many. In addition, two modes of centralized storage battery power supply and self-contained storage battery power supply respectively have own advantages and disadvantages, and the two modes are specifically analyzed and reasonably adopted according to actual conditions in engineering, so that the emergency lighting system in the building can play the roles of reducing casualties of people and reducing property loss when a disaster occurs.
There are two types of existing emergency evacuation lighting systems.
One is free standing: each emergency lamp is internally provided with a whole set of voltage reduction, voltage stabilization, storage battery, light-emitting components (bulbs or LEDs) and the like.
The working principle is as follows: after 220V alternating current passes through a set of voltage reduction device, low-voltage direct current is output, and light is emitted to the light-emitting component (1) through simple voltage stabilization to provide illumination; (2) the battery is charged. When the alternating current is in power failure, the battery supplies power to the light-emitting component to emit light so as to provide illumination.
The disadvantages are as follows:
(1) for a single lamp, the used components are multiple and complex, and the failure rate is high. And a storage battery is also arranged, so that the lamp is heavy, inconvenient to install and unsafe.
(2) The battery management function is not provided, the automatic conversion of uniform and floating charging and the control of the charging current are not realized in the process of charging the battery. The battery can not reach the rated capacity, and the discharge time is shortened. The battery is simply float charged, and the service life of the battery is greatly shortened.
Summarizing the two points, the failure rate of the whole set of emergency evacuation lighting system is extremely high, the overhaul and management are inconvenient, and the maintenance workload is large. The number of used batteries is large (for example, 100 lamps are used in a building, and the number of used batteries is 100), the reliability of the whole system is poor, the price is high, and the like.
The other is a direct current centralized power supply mode: a plurality of independent module units with different functions are simply put into a cabinet together with a storage battery pack (two or three 12V storage batteries) in a splicing mode, and then combined to realize a direct current centralized power supply mode in a form of external connecting wires.
The direct current centralized power supply mode comprises the following components: two independent power modules (AC/DC converters); an independent centralized power controller; a separate dc output controller (router); one or two output terminal boards; a man-machine interaction unit, etc. The working principle is as follows: and 1, the direct-current voltage (without external control) output by the first independent power supply module independently charges the storage battery. And 2, the direct-current voltage output by the second independent power supply module (without external control) is supplied to the load through the direct-current output controller to the output wiring board. When the alternating current is in power failure, the storage battery is connected to the direct current output controller through the switch (controlled by the centralized power supply controller) and then output to the wiring board to supply power to the load.
(the load refers to the lamp).
The disadvantages are as follows:
(1) because the module consists of a plurality of independent modules, the modules are connected through external wires, and a plurality of connecting wires and nodes are generated. Increasing instability; the failure rate is high; the reliability of the system is reduced; the production cost is high. (2) Because the dc voltage and current output by the power supply module are not externally controlled. The battery management function is not provided, the automatic conversion of uniform and floating charging and the control of the charging current are not realized in the process of charging the battery. The battery can not reach the rated capacity, and the discharge time is shortened. The battery is simply float charged, and the service life of the battery is greatly shortened. (3) The load output has no real-time monitoring and protection functions. Because the number of the connected lamps is large, the multi-channel power supply mode is adopted, and the power transmission distance is long. If a fault or problem occurs, the equipment cannot be timely warned and protected. (4) The automatic activation function of the storage battery is not provided, and only manual activation is performed, so that the maintenance workload is increased.
Along with the improvement of people on safety awareness, the importance of fire safety is particularly important. A safe and reliable dc emergency evacuation lighting centralized control power supply system is needed.
Conventional emergency evacuation power is 220 v ac and each lighting unit is self-contained. It is neither safe nor reliable.
The direct current centralized power supply mode comprises the following steps: the inside of the lamp is not provided with a storage battery, a complicated electronic circuit and the like. All lamps and lanterns power supply mode is from low pressure direct current power supply and the battery in the centralized control power supply. As the whole system only has one set of storage battery as a standby power supply, the power consumption of all emergency lamps is connected with the centralized storage battery device, but if the power supply part of the centralized power supply type fire-fighting emergency evacuation lighting system fails, the whole system is affected, so that the requirement on the centralized control power supply of the direct current emergency evacuation lighting is very high, and the failure rate is low.
Disclosure of Invention
The present invention is directed to a dc emergency evacuation lighting centralized control power supply system, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a direct current emergency evacuation illumination centralized control power supply system, includes the mainboard, its characterized in that: the main board is provided with an external alternating current input unit, a first auxiliary power supply, a second auxiliary power supply, a battery/control unit, a first control unit to an Nth control unit, a first output unit to an Nth output unit, a voltage stabilizing circuit 5V unit, a communication unit, a temperature acquisition unit, a dry contact point unit, a total fault warning unit, a control and related circuit unit, a battery inspection unit, a voltage and current signal processing unit and a battery management unit.
As a further scheme of the invention: the external alternating current input unit is divided into two paths, one path is connected to the alternating current sampling circuit, and the information contained in the alternating current is sent to the CPU for processing; the data processed by the CPU is transmitted to a man-machine interaction unit and displayed; the CPU sends a signal to close the AC/DC to protect equipment if the voltage value is beyond the range (85-265V) according to the voltage value acquired by the AC sampling circuit in real time; the other path is rectified by an EMC filter and then enters a PFC circuit, and the PFC circuit outputs voltage of 380-400V direct current to be respectively supplied to an auxiliary power supply 1 and AC/DC; the AC/DC (working mode half-bridge LLC circuit) is controlled by a CPU to output direct current voltage and current, the direct current voltage is supplied (an auxiliary power supply 2) at the same time, a battery is charged, and the first path is controlled to the Nth path; the direct current voltage output (from the first path to the Nth path) is controlled by the control (from the first path to the Nth path) and then is output to a load; the load output voltage is provided by two paths of voltage simultaneously (one path is AC/DC, the other path is an external battery), when the alternating current and the battery supply power simultaneously, the alternating current is supplied to the load, when the alternating current is powered off, the battery supplies the load, and the problem of time switching does not exist; all load output voltages are controlled (from the first path control to the Nth path control); and (first to nth control) is controlled and managed by the CPU, that is, the load output is controlled and managed by the CPU; CPU control and management (from the first path control to the Nth path control), wherein the CPU compares the current and voltage values of each path of output current and voltage value set manually with the current and voltage values output in real time; if the current and voltage values output in real time exceed the set values, the CPU sends out an alarm signal, and meanwhile, the output is turned off to play a role in protection.
As a still further scheme of the invention: the first auxiliary power supply input voltage is provided by an external AC after being rectified by an EMC filter, and then is provided by a direct current voltage output by an FPC, and the working mode is that the first auxiliary power supply input voltage is formed by flyback and outputs two paths of direct current voltages: (1)12V-15V, (2) isolated 12V, and working voltage supplied to a PFC circuit and an AC/DC circuit; the second auxiliary power input voltage is provided by a direct current voltage of an AC/DC output or a battery voltage; the working mode is a DC/DC circuit formed by BUCK step-down type; the output of three direct current voltages (only 1-2 voltages are output in the traditional BUCK working mode) is respectively as follows: (1)12V, (2) negative 5V, (3) isolated 5V; 12V supplies the working voltage of related control circuits, fans and human-computer interaction units; the negative 5V supplies the working voltage of the related control circuit, and the isolated 5V supplies the working voltage of the communication circuit; the battery/control unit is composed of an external battery, a battery switch, a battery positive and negative polarity reverse-prevention protection circuit, a battery positive and negative polarity wiring correct indicator lamp, a positive and negative polarity reverse-prevention warning lamp, an overcurrent fuse and the like, and the CPU can control the connection and disconnection of the battery.
As a still further scheme of the invention: the first path to the Nth path of control units are composed of electronic switch circuits, wherein each path can be manually set in an on-off state, a current value and a voltage range, and can also be interconnected through a master control room or a background to control the on-off state of each path; the first path output to the Nth path output unit is composed of an output wiring terminal, an overcurrent fuse and a voltage and current circuit, the voltage stabilizing circuit 5V unit is a direct current 12V voltage provided by the auxiliary power supply 2, the voltage stabilizing circuit outputs a 5V voltage, and the 5V voltage supplies the working voltage of the following circuits; a CPU, a buzzer, a temperature sample, and a circuit associated with the CPU; the communication unit is interconnected with the master control room or the background so as to realize data transmission, remote measurement can be realized by being interconnected with the master control room or the background, the temperature acquisition unit is mainly used for monitoring a heating power device in real time, transmitting real-time temperature data to the CPU, controlling or switching off the AC/DC and the fan according to temperature parameters, and if the temperature is too high, switching off the AC/DC to enable the AC/DC to be in a protection state, and simultaneously, starting the fan to radiate heat.
As a still further scheme of the invention: the dry contact unit consists of a relay and a driving circuit, and the CPU controls the on-off state of the dry contact unit; if the fault relay is closed, the fault relay is used for outputting a total fault alarm; the total fault alarm unit comprises an abnormal alternating voltage input unit, an abnormal battery voltage unit, an abnormal single battery voltage unit, an inverse battery positive and negative polarity, an overhigh temperature, an abnormal output end voltage unit, an output end current larger than a set value, an output end short circuit and the like; the control and related circuit unit comprises a peripheral circuit of the CPU, a control circuit, a battery inspection circuit, a battery management and sampling circuit and the like.
As a still further scheme of the invention: the battery inspection unit monitors real-time parameters of the battery, transmits the acquired data of the total voltage of the battery and the voltage of the single battery to the CPU, transmits the data to the man-machine interaction unit after the data are processed by the CPU, and displays the total voltage of the battery and the voltage of the single battery; the CPU sends out alarm signals to shut down the battery or shut down the output and the like if the voltage value exceeds the range (the set range is the lowest value and the highest value) according to the voltage value acquired in real time, so as to prevent the battery from over-discharging, protect the battery and prolong the service life of the battery.
As a still further scheme of the invention: the voltage and current signal processing unit transmits the collected data of the real-time output voltage and current (from the first path to the Nth path) to the CPU, the data is transmitted to the man-machine interaction unit after being processed by the CPU, and the voltage and current value output by each path is displayed.
As a still further scheme of the invention: the battery management unit is mainly used for managing the battery, (1) the CPU is used for controlling the battery according to the set parameters, the characteristics and the temperature of the storage battery, the battery capacity, the discharging process and other parameters; the control of AC/DC output voltage and current is realized, and the intelligent charging processes of floating charging, uniform charging, constant voltage and constant current of the battery are completed; (2) the activation control of the battery is automatically completed (the activation parameters can be set).
Compared with the prior art, the invention has the beneficial effects that:
1. the functional units are optimized on one PCB, connecting wires are few, and the layout is scientific;
2. the battery management function is complete;
3. the protection function is complete;
4. compared with the existing DC emergency evacuation lighting centralized control power supply system, the production cost is saved by more than 50%.
Drawings
Fig. 1 is a frame topology diagram of a dc emergency evacuation lighting centralized control power supply system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a dc emergency evacuation lighting centralized control power supply system includes a main board, where an external ac input unit, a first auxiliary power supply, a second auxiliary power supply, a battery/control unit, a first path control unit to an nth path control unit, a first path output unit to an nth path output unit, a voltage stabilizing circuit 5V unit, a communication unit, a temperature acquisition unit, a dry contact unit, a total fault alarm unit, a control and related circuit unit, a battery inspection unit, a voltage and current signal processing unit, and a battery management unit are disposed on the main board, where the external ac input unit is divided into two paths, and one path is connected to an ac sampling circuit (ac sampling circuit) that sends information included in ac to a CPU for processing. And the data processed by the CPU is transmitted to the man-machine interaction unit and displayed. The CPU sends a signal to close the AC/DC to protect equipment if the voltage value is beyond the range (85-265V) according to the voltage value acquired by the AC sampling circuit in real time; the other path is rectified by an EMC filter and then enters the PFC circuit, and the voltage of direct current 380-400V output by the PFC circuit is respectively supplied to the auxiliary power supply 1 and the AC/DC. The AC/DC (working mode half-bridge LLC circuit) is controlled by CPU to output DC voltage and current, the DC voltage is simultaneously supplied (auxiliary power supply 2), the battery is charged, and the first control channel is controlled to the Nth control channel. The direct current voltage output (from the first path to the Nth path) is controlled by the control (from the first path to the Nth path) and then is output to the load. The load output voltage is provided by two paths of voltage simultaneously (one path is AC/DC, the other path is an external battery), when the alternating current and the battery supply power simultaneously, the alternating current is supplied to the load, when the alternating current is in power failure, the battery supplies the load, and the problem of time switching does not exist. All load output voltages are controlled (first through nth control). And (first to nth control) is controlled and managed by the CPU, that is, the load output is controlled and managed by the CPU. And (4) CPU control and management (from the first path control to the Nth path control), wherein the CPU compares the current and voltage values output by each path according to manual setting with the current and voltage values output in real time. If the current and voltage values output in real time exceed the set values, the CPU sends an alarm signal, and meanwhile, the output is turned off to play a role in protection, the input voltage of the first auxiliary power supply is provided after being rectified by an external AC through an EMC filter, and then is provided by the direct current voltage output by the FPC, and the working mode is that the first auxiliary power supply is formed by flyback and outputs two paths of direct current voltages: (1)12V-15V, (2) isolated 12V, and working voltage supplied to a PFC circuit and an AC/DC circuit; the second auxiliary power input voltage is provided by a direct current voltage of an AC/DC output or a battery voltage. The operation mode is a DC/DC circuit composed of a BUCK step-down type. The output of three direct current voltages (only 1-2 voltages are output in the traditional BUCK working mode) is respectively as follows: (1)12V, (2) minus 5V, and (3) isolated 5V. 12V supplies the working voltage of related control circuits, fans and man-machine interaction units. The negative 5V supplies the working voltage of the related control circuit, and the isolated 5V supplies the working voltage of the communication circuit; the battery/control unit is composed of an external battery, a battery switch, a battery positive and negative polarity reverse-prevention protection circuit, a battery positive and negative polarity wiring correct indicator light, a positive and negative polarity reverse-prevention warning light, an overcurrent fuse and the like, and the CPU can control the connection and disconnection of the battery; the first path to the Nth path of control units are composed of electronic switch circuits, wherein each path can be manually set in an on-off state, a current value and a voltage range, and can also be interconnected through a master control room or a background to control the on-off state of each path; the first path output to the Nth path output unit is composed of an output wiring terminal, an overcurrent fuse and a voltage and current circuit, the voltage stabilizing circuit 5V unit is a direct current 12V voltage provided by the auxiliary power supply 2, the voltage stabilizing circuit outputs a 5V voltage, and the 5V voltage supplies the working voltage of the following circuits. A CPU, a buzzer, a temperature sample, and a circuit associated with the CPU; the communication unit is interconnected with the master control room or the background so as to realize data transmission, remote measurement can be realized by being interconnected with the master control room or the background, the temperature acquisition unit is mainly used for monitoring a heating power device in real time, transmitting real-time temperature data to the CPU, controlling or switching off the AC/DC and the fan according to temperature parameters, and if the temperature is too high, switching off the AC/DC to enable the AC/DC to be in a protection state, and simultaneously, starting the fan to radiate heat;
the dry contact unit is composed of a relay and a drive circuit, and the CPU controls the on-off state of the dry contact unit. If the fault relay is closed, the fault relay is used for outputting a total fault alarm; the total fault alarm unit comprises an abnormal alternating voltage input unit, an abnormal battery voltage unit, an abnormal single battery voltage unit, an inverse battery positive and negative polarity, an overhigh temperature, an abnormal output end voltage unit, an output end current larger than a set value, an output end short circuit and the like; the control and related circuit unit comprises a peripheral circuit of the CPU, a control circuit, a battery inspection circuit, a battery management and sampling circuit and the like;
the battery inspection unit monitors real-time parameters of the battery, transmits the collected data of the total voltage of the battery and the voltage of the single battery to the CPU, and transmits the data to the man-machine interaction unit after the data are processed by the CPU and displays the total voltage of the battery and the voltage of the single battery. The CPU sends out an alarm signal to turn off the battery or turn off the output and the like if the voltage value exceeds a set range (the set range is the lowest value and the highest value) according to the voltage value acquired in real time, so as to prevent the battery from over-discharging, protect the battery and prolong the service life of the battery;
the voltage and current signal processing unit transmits the collected data of the real-time output voltage and current (from the first path to the Nth path) to the CPU, the data is transmitted to the man-machine interaction unit after being processed by the CPU, and the voltage and current value output by each path is displayed.
The battery management unit mainly manages the battery, and (1) the CPU controls the battery according to the set parameters, the characteristics and the temperature of the storage battery, the battery capacity, the discharging process and other parameters. The control of AC/DC output voltage and current is realized, and the intelligent charging process of floating charging, uniform charging, constant voltage and constant current of the battery is completed. (2) The activation control of the battery is automatically finished (the activation parameters can be set), and the battery can also be manually activated.
Lead-acid batteries, when left unused for a long period of time or when undercharged for a long period of time, may cause the active material, mainly the negative electrode active material, to become sulfidized and ineffective, resulting in capacity fading. In this case, several times of charging and discharging with a large current may be performed to activate these sulfurized active materials, and this process is called activation.
Through the two points, the service life of the battery is prolonged to the maximum extent.
A fan, (on/off/power-on) switch and a man-machine interaction unit are arranged on the periphery of the mainboard;
the fan is connected with the mainboard through a connecting wire and is controlled by the CPU, and the CPU turns on or off the fan according to data given by (temperature acquisition). The heat dissipation and cooling are carried out on the heating power device, and the device is effectively protected.
The (on/off/forced start) switch is connected with the mainboard through a connecting wire and is a switch with a key, the on (with an automatic function) is used for turning on the battery, and the off is used for turning off the battery. The forced start is to forcibly turn on the battery regardless of whether the battery is in a protection state (if the battery voltage is lower than a protection set value, the battery is automatically turned off in the battery-on state).
The man-machine interaction unit is formed by connecting a color touch screen with a main board through a connecting wire. All relevant data, information, working states and the like are displayed on the color touch screen, and all parameters, working modes and the like can be set manually through an interface on the color touch screen.
The invention has sound multiple protection measures (PFC, AC/DC, software and hardware are protected), each circuit has a sensitive, effective and reliable protection circuit, high and reliable operation of equipment and low fault are ensured, and safe operation of a system is ensured.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a direct current emergency evacuation illumination centralized control power supply system, includes the mainboard, its characterized in that: the main board is provided with an external alternating current input unit, a first auxiliary power supply, a second auxiliary power supply, a battery/control unit, a first control unit to an Nth control unit, a first output unit to an Nth output unit, a voltage stabilizing circuit 5V unit, a communication unit, a temperature acquisition unit, a dry contact point unit, a total fault warning unit, a control and related circuit unit, a battery inspection unit, a voltage and current signal processing unit and a battery management unit.
2. The dc emergency evacuation lighting centralized control power supply system according to claim 1, wherein: the external alternating current input unit is divided into two paths, one path is connected to the alternating current sampling circuit, and the information contained in the alternating current is sent to the CPU for processing; the data processed by the CPU is transmitted to a man-machine interaction unit and displayed; the CPU sends a signal to close the AC/DC to protect equipment if the voltage value is beyond the range (85-265V) according to the voltage value acquired by the AC sampling circuit in real time; the other path is rectified by an EMC filter and then enters a PFC circuit, and the PFC circuit outputs voltage of 380-400V direct current to be respectively supplied to an auxiliary power supply 1 and AC/DC; the AC/DC (working mode half-bridge LLC circuit) is controlled by a CPU to output direct current voltage and current, the direct current voltage is supplied (an auxiliary power supply 2) at the same time, a battery is charged, and the first path is controlled to the Nth path; the direct current voltage output (from the first path to the Nth path) is controlled by the control (from the first path to the Nth path) and then is output to a load; the load output voltage is provided by two paths of voltage simultaneously (one path is AC/DC, the other path is an external battery), when the alternating current and the battery supply power simultaneously, the alternating current is supplied to the load, when the alternating current is powered off, the battery supplies the load, and the problem of time switching does not exist; all load output voltages are controlled (from the first path control to the Nth path control); and (first to nth control) is controlled and managed by the CPU, that is, the load output is controlled and managed by the CPU; CPU control and management (from the first path control to the Nth path control), wherein the CPU compares the current and voltage values of each path of output current and voltage value set manually with the current and voltage values output in real time; if the current and voltage values output in real time exceed the set values, the CPU sends out an alarm signal, and meanwhile, the output is turned off to play a role in protection.
3. The dc emergency evacuation lighting centralized control power supply system according to claim 1, wherein: the first auxiliary power supply input voltage is provided by an external AC after being rectified by an EMC filter, and then is provided by a direct current voltage output by an FPC, and the working mode is that the first auxiliary power supply input voltage is formed by flyback and outputs two paths of direct current voltages: (1)12V-15V, (2) isolated 12V, and working voltage supplied to a PFC circuit and an AC/DC circuit; the second auxiliary power input voltage is provided by a direct current voltage of an AC/DC output or a battery voltage; the working mode is a DC/DC circuit formed by BUCK step-down type; the output of three direct current voltages (only 1-2 voltages are output in the traditional BUCK working mode) is respectively as follows: (1)12V, (2) negative 5V, (3) isolated 5V; 12V supplies the working voltage of related control circuits, fans and human-computer interaction units; the negative 5V supplies the working voltage of the related control circuit, and the isolated 5V supplies the working voltage of the communication circuit; the battery/control unit is composed of an external battery, a battery switch, a battery positive and negative polarity reverse-prevention protection circuit, a battery positive and negative polarity wiring correct indicator lamp, a positive and negative polarity reverse-prevention warning lamp, an overcurrent fuse and the like, and the CPU can control the connection and disconnection of the battery.
4. The dc emergency evacuation lighting centralized control power supply system according to claim 1, wherein: the first path to the Nth path of control units are composed of electronic switch circuits, wherein each path can be manually set in an on-off state, a current value and a voltage range, and can also be interconnected through a master control room or a background to control the on-off state of each path; the first path output to the Nth path output unit is composed of an output wiring terminal, an overcurrent fuse and a voltage and current circuit, the voltage stabilizing circuit 5V unit is a direct current 12V voltage provided by the auxiliary power supply 2, the voltage stabilizing circuit outputs a 5V voltage, and the 5V voltage supplies the working voltage of the following circuits; a CPU, a buzzer, a temperature sample, and a circuit associated with the CPU; the communication unit is interconnected with the master control room or the background so as to realize data transmission, remote measurement can be realized by being interconnected with the master control room or the background, the temperature acquisition unit is mainly used for monitoring a heating power device in real time, transmitting real-time temperature data to the CPU, controlling or switching off the AC/DC and the fan according to temperature parameters, and if the temperature is too high, switching off the AC/DC to enable the AC/DC to be in a protection state, and simultaneously, starting the fan to radiate heat.
5. The dc emergency evacuation lighting centralized control power supply system according to claim 1, wherein: the dry contact unit consists of a relay and a driving circuit, and the CPU controls the on-off state of the dry contact unit; if the fault relay is closed, the fault relay is used for outputting a total fault alarm; the total fault alarm unit comprises an abnormal alternating voltage input unit, an abnormal battery voltage unit, an abnormal single battery voltage unit, an inverse battery positive and negative polarity, an overhigh temperature, an abnormal output end voltage unit, an output end current larger than a set value, an output end short circuit and the like; the control and related circuit unit comprises a peripheral circuit of the CPU, a control circuit, a battery inspection circuit, a battery management and sampling circuit and the like.
6. The dc emergency evacuation lighting centralized control power supply system according to claim 1, wherein: the battery inspection unit monitors real-time parameters of the battery, transmits the acquired data of the total voltage of the battery and the voltage of the single battery to the CPU, transmits the data to the man-machine interaction unit after the data are processed by the CPU, and displays the total voltage of the battery and the voltage of the single battery; the CPU sends out alarm signals to shut down the battery or shut down the output and the like if the voltage value exceeds the range (the set range is the lowest value and the highest value) according to the voltage value acquired in real time, so as to prevent the battery from over-discharging, protect the battery and prolong the service life of the battery.
7. The dc emergency evacuation lighting centralized control power supply system according to claim 1, wherein: the voltage and current signal processing unit transmits the collected data of the real-time output voltage and current (from the first path to the Nth path) to the CPU, the data is transmitted to the man-machine interaction unit after being processed by the CPU, and the voltage and current value output by each path is displayed.
8. The dc emergency evacuation lighting centralized control power supply system according to claim 1, wherein: the battery management unit is mainly used for managing the battery, (1) the CPU is used for controlling the battery according to the set parameters, the characteristics and the temperature of the storage battery, the battery capacity, the discharging process and other parameters; the control of AC/DC output voltage and current is realized, and the intelligent charging processes of floating charging, uniform charging, constant voltage and constant current of the battery are completed; (2) the activation control of the battery is automatically completed.
9. The dc emergency evacuation lighting centralized control power supply system according to claim 1, wherein: and a fan, an on/off/strong-on switch and a man-machine interaction unit are arranged on the periphery of the mainboard.
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| CN202011193606.3A CN112198830A (en) | 2020-10-30 | 2020-10-30 | DC emergency evacuation lighting centralized control power supply system |
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| CN202011193606.3A CN112198830A (en) | 2020-10-30 | 2020-10-30 | DC emergency evacuation lighting centralized control power supply system |
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