Charging management circuit for fire-fighting controller

Abstract

The utility model discloses a charging management circuit for a fire-fighting controller, which relates to the technical field of circuit management and specifically comprises a switching power supply, an XL6019E1 boost chip, an R88 resistor, an R90 resistor, an R92 resistor, a Q12 triode and a D22 diode. According to the charging management circuit for the fire-fighting controller, the switching power supply, the XL6019E1 boost chip, the R88 resistor, the R90 resistor, the R92 resistor, the Q12 triode and the D22 diode are arranged, so that the charging management circuit for the fire-fighting controller has the characteristics of simple circuit topology, stable and reliable performance, easy type selection of the boost chip, low cost and the like; the charging management chip is simple in structure, meets the constant-current, constant-voltage and floating charging modes of battery charging, completely meets the charging requirements of lithium batteries, is mature and reliable in main chip (boost chip), easy to purchase and low in cost, solves the problem that six strings of lithium batteries are not provided with suitable charging management chips, has the functions of lithium battery overvoltage and overcurrent protection, prolongs the service life of the lithium batteries, and is simple, stable and reliable in circuit topology.

Description

Technical Field

[0001] The utility model relates to the field of circuits, in particular to a charging management circuit for a fire controller. Background Art

[0002] The fire controller is the heart of the automatic fire alarm system. It can supply power to the detector and has the following functions: it is used to receive fire signals and start the fire alarm device. The device can also be used to indicate the location of the fire and record relevant information. It can start the fire alarm signal through the fire alarm sending device or start the automatic fire extinguishing equipment and fire linkage control equipment through the automatic fire extinguishing control device. It automatically monitors the correct operation of the system and gives sound and light alarms for specific faults. The capacity of a regional alarm controller (that is, the number of locations it can monitor) also varies depending on the product model, generally dozens of locations. The regional alarm controller usually patrols to detect the working status of the detectors in each location in the alarm area, finds fire signals or fault signals, and promptly sends out sound and light alarm signals. If it is a fire signal, at the same time as the sound and light alarm, some regional alarm controllers also have the function of linking relay contacts to start certain fire equipment. These fire equipment include smoke exhaust fans, fire doors, fire curtains, etc. If it is a fault signal, it is only a sound and light alarm, and the fire equipment is not linked. After receiving the alarm signal from the detector, the regional alarm controller will send out an audible and visual alarm and transmit the alarm signal to the centralized alarm controller in the fire control room. The self-test button is used to check the faults of each alarm line (short circuit or open circuit) and send out a simulated fire signal to check whether the detector function and line condition are intact. When there is a fault, a fault alarm signal will be sent out (only audible and visual alarms are sent out, and the memory unit and linkage unit will not work). The backup power management circuit of the traditional fire controller usually uses lead-acid batteries, which have the disadvantages of large size, heavy weight, and large internal resistance. When the current is large, the voltage drops significantly, affecting the stable operation of the system, so it is not suitable for use on the fire controller. Lithium batteries are small, light, and have extremely low internal resistance, so using lithium batteries as backup power will be the mainstream direction in the future.

[0003] The external power supply voltage of the fire controller in the prior art is usually 24V, so it is necessary to select a backup battery close to 24V. The voltage of a lithium battery close to 24V is 21.6V when it is low on power and 25.2V when it is fully charged, that is, 6 strings of lithium batteries. However, it is difficult to find a charging management chip for 6 strings of lithium batteries on the market, so it is necessary to design a charging management circuit for 6 strings of lithium batteries. Therefore, a charging management circuit for a fire controller is proposed to solve the above problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a charging management circuit for a fire controller, which solves the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a charging management circuit for a fire controller, including a switching power supply, an XL6019E1 boost chip, an R88 resistor, an R90 resistor, an R92 resistor, a Q12 transistor and a D22 diode, the switching power supply is electrically connected to the D1 diode through a wire, the D1 diode is electrically connected to the D2 diode through a wire, the D2 diode is electrically connected to the D3 diode through a wire, the D3 diode is electrically connected to the D4 diode through a wire, the D4 diode is electrically connected to the D8 diode through a wire, the D8 diode is electrically connected to the D7 diode through a wire, the D7 diode is electrically connected to the D6 diode through a wire, and the D6 diode is electrically connected to the D5 diode through a wire.

[0006] Optionally, the XL6019E1 boost chip is a boost chip with adjustable voltage output, and the D22 diode is electrically connected to the XL6019E1 boost chip through a wire.

[0007] Optionally, resistor R92 is a charging current sampling resistor, and resistor R92 is electrically connected to transistor Q12 through a wire.

[0008] Optionally, the switching power supply output voltage is 24V, and the charging current in the constant current stage is stabilized to 583mA.

[0009] Optionally, both the R88 resistor and the R90 resistor are electrically connected to the XL6019E1 boost chip through wires, and the R88 resistor and the R90 resistor adjust the maximum output voltage of the XL6019E1 boost chip to 25.2V.

[0010] Optionally, resistor R92 is electrically connected to transistor Q12 via a wire, and transistor Q12 is electrically connected to diode D22 via a wire.

[0011] The utility model provides a charging management circuit for a fire controller, which has the following beneficial effects:

[0012] 1. The charging management circuit for the fire controller has the characteristics of simple circuit topology, stable and reliable performance, easy selection of boost chip, low cost, etc. through the setting of switching power supply, XL6019E1 boost chip, R88 resistor, R90 resistor, R92 resistor, Q12 transistor and D22 diode. It conforms to the constant current, constant voltage and floating charging methods of battery charging, fully meets the charging requirements of lithium battery, and achieves the purpose of improving practicality.

[0013] 2. The charging management circuit for the fire controller, through the setting of the switching power supply, XL6019E1 boost chip, R88 resistor, R90 resistor, R92 resistor, Q12 transistor and D22 diode, makes the charging management circuit for the fire controller have the main chip (boost chip) mature and reliable, easy to purchase, low cost, solves the problem that there is no suitable charging management chip for 6-string lithium batteries, has lithium battery overvoltage and overcurrent protection functions, extends the service life of lithium batteries, has a simple circuit topology, is stable and reliable, and achieves the purpose of improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the charging management circuit structure of the utility model. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] See also Figure 1 The utility model provides a technical solution: a charging management circuit for a fire controller, including a switching power supply, an XL6019E1 boost chip, an R88 resistor, an R90 resistor, an R92 resistor, a Q12 transistor and a D22 diode. The XL6019E1 boost chip is a boost chip with adjustable voltage output. The D22 diode is electrically connected to the XL6019E1 boost chip through a wire. The main chip (boost chip) is mature and reliable, easy to purchase, and low in cost. The R92 resistor is a charging current sampling resistor. The R92 resistor is electrically connected to the Q12 transistor through a wire. The output voltage of the switching power supply is 24V. The charging current in the constant current stage is stable to 583mA. The R88 resistor and the R90 resistor are both electrically connected to the XL6019E1 boost chip through a wire, and the R88 resistor and the R90 resistor are electrically connected to the XL6019E1 boost chip through a wire. The maximum output voltage of the resistor-adjusted XL6019E1 boost chip is 25.2V, the R92 resistor is electrically connected to the Q12 transistor through a wire, the Q12 transistor is electrically connected to the D22 diode through a wire, the switching power supply is electrically connected to the D1 diode through a wire, the D1 diode is electrically connected to the D2 diode through a wire, the D2 diode is electrically connected to the D3 diode through a wire, the D3 diode is electrically connected to the D4 diode through a wire, the D4 diode is electrically connected to the D8 diode through a wire, the D8 diode is electrically connected to the D7 diode through a wire, the D7 diode is electrically connected to the D6 diode through a wire, and the D6 diode is electrically connected to the D5 diode through a wire. It has lithium battery overvoltage and overcurrent protection functions, extends the service life of lithium batteries, and has a simple circuit topology, which is stable and reliable.

[0017] When in use, the output voltage of the switching power supply is 24V, which passes through D1, D2, D3, D4, D5, D6, D7, and D8 diodes to reduce the voltage to 18.4V. XL6019E1 is a boost chip with adjustable voltage output. R88 and R90 adjust the maximum output voltage of the boost chip to 25.2V. R92 is a charging current sampling resistor. When the current exceeds 583mA, that is, the voltage across R92 exceeds 0.7V, the Q12 transistor is turned on, and the current passes through D22 into the feedback pin FB of XL6019E1, which reduces the output voltage of XL6019E1, thereby forming a negative feedback circuit, so that the charging current in the constant current stage is stabilized to 583mA, the current output is stable, and the stability of the battery charging is improved. When the battery voltage is charged to 25.2V, charging is stopped. This circuit has the characteristics of simple circuit topology, stable and reliable performance, easy selection of boost chip, low cost, etc. It conforms to the constant current, constant voltage and floating charging methods of battery charging, and fully meets the charging requirements of lithium batteries. The main chip (boost chip) is mature and reliable, easy to purchase and low cost; it solves the problem of no suitable charging management chip for 6-string lithium batteries; it has lithium battery overvoltage and overcurrent protection functions, extending the service life of lithium batteries; the circuit topology is simple, stable and reliable, and improves practicality.

[0018] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A charging management circuit for a fire controller, comprising a switching power supply, an XL6019E1 boost chip, an R88 resistor, an R90 resistor, an R92 resistor, a Q12 transistor and a D22 diode, Features: The switching power supply is electrically connected to the D1 diode through a wire, the D1 diode is electrically connected to the D2 diode through a wire, the D2 diode is electrically connected to the D3 diode through a wire, the D3 diode is electrically connected to the D4 diode through a wire, the D4 diode is electrically connected to the D8 diode through a wire, the D8 diode is electrically connected to the D7 diode through a wire, the D7 diode is electrically connected to the D6 diode through a wire, and the D6 diode is electrically connected to the D5 diode through a wire.

2. A charging management circuit for a fire controller according to claim 1, Features: The XL6019E1 boost chip is a boost chip with adjustable voltage output, and the D22 diode is electrically connected to the XL6019E1 boost chip through a wire.

3. A charging management circuit for a fire controller according to claim 1, Features: The resistor R92 is a charging current sampling resistor, and the resistor R92 is electrically connected to the transistor Q12 through a wire.

4. A charging management circuit for a fire controller according to claim 1, Features: The output voltage of the switching power supply is 24V, and the charging current in the constant current stage is stabilized to 583mA.

5. A charging management circuit for a fire controller according to claim 1, Features: The resistors R88 and R90 are electrically connected to the XL6019E1 boost chip through wires, and the resistors R88 and R90 adjust the maximum output voltage of the XL6019E1 boost chip to 25.2V.

6. A charging management circuit for a fire controller according to claim 1, Features: The resistor R92 is electrically connected to the transistor Q12 through a wire, and the transistor Q12 is electrically connected to the diode D22 through a wire.

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