Fire power charger

Abstract

The application discloses a fire power charger, which overcomes the problem of poor safety performance of the prior art fire power charger due to the failure to protect in time when charging short circuit or open circuit, and comprises the following parts: a circuit protection module, which comprises a field effect tube VT1 and provides open circuit and short circuit protection; a single-chip microcomputer and a power supply module thereof, which control the charger through the sampling circuit protection module; a CAN communication module; a charging state information sending unit, which sends charging state information to prompt the user; the circuit protection module and the CAN communication module are connected with the single-chip microcomputer and the power supply module thereof; and the single-chip microcomputer and the power supply module thereof comprise a single-chip microcomputer module and a system power supply module which are connected with each other. The application can feed back the open circuit and various states to the fire system in time, and improve the safety of the fire system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fire-fighting charger, in particular to a fire-fighting power charger. BACKGROUND

[0002] The fire-fighting power supply is suitable for providing centralized power supply for evacuation lighting and other important primary power loads when a building catches fire. When the alternating current (AC) mains is normal, the AC mains supplies power to important loads through a mutual switching device. When the AC mains is powered off, the mutual switching device will immediately switch to an inverter for power supply. The power supply time is determined by the capacity of the battery. When the mains voltage is restored, the emergency power supply will be restored to mains power supply. The existing fire-fighting power supply is charged by a ready-made charger. In the case of charging circuit short circuit or open circuit and other faults, it is not possible to upload to the fire-fighting system. The components are easily damaged in the fault state, and the safety is poor. The original power supply uses 220V, which increases the cost of the power supply. At the same time, it uses a battery, and the lead-acid and lithium batteries in the battery cannot be shared. SUMMARY

[0003] The present application is to overcome the problem of poor safety performance of the existing fire-fighting power supply when charging short circuit or open circuit, and to provide a fire-fighting power charger. The short circuit or open circuit and various states are fed back to the fire-fighting system in time, and the safety of the fire-fighting system is improved.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] A fire-fighting power charger, comprising:

[0006] A circuit protection module comprising a field effect transistor VT1, which provides open circuit and short circuit protection.

[0007] A single-chip microcomputer and its power supply module control the charger by sampling the circuit protection module.

[0008] A CAN communication module sends charging state information to prompt the user of the charging state.

[0009] The circuit protection module and the CAN communication module are connected to the single-chip microcomputer and its power supply module.

[0010] The single-chip microcomputer and its power supply module comprise a single-chip microcomputer module and a system power supply module connected to each other.

[0011] The single-chip microcomputer module uses a single-chip microcomputer IC1.

[0012] The application adopts 36V power supply, has short circuit and open circuit protection function, overcurrent protection function, ensures that components are not damaged, and the single-chip microcomputer and its power supply module perform PWM modulation on the circuit protection module; when the battery voltage is at a certain value, the PWM regulation makes the output voltage higher than the battery voltage, charges the battery, and the sampling voltage feedback PWM regulates the current size; the sampling PWM output voltage is used to close the charger for protection when the output voltage is too high; the circuit protection module can also protect the battery from overcharging; the circuit protection module prompts whether the charging state; since the voltages of lithium batteries and lead-acid batteries are different, the battery voltage is sampled, and when it reaches a certain voltage value, it is closed to achieve the protection effect; when the power is off, the circuit is still connected with the charger, and in the prior art, the battery circuit protection module is discharged at ordinary times, which is not good for the service life of the battery; when the single-chip microcomputer module detects a high level, it is quickly closed to achieve rapid protection; the CAN communication module communicates with the single-chip microcomputer module of the fire fighting system, and uploads the charging source state at regular intervals; the output of the switching power supply is DC 36V.

[0013] As preferred, the circuit protection module further comprises a fuse F2, an electrolytic capacitor C13, a resistor R12, a resistor R15, a resistor R19, a resistor R28, a triode BQ1, a resistor R32, a resistor R21, a resistor R18, a triode BQ6, a triode BQ4, a triode BQ2, a triode VT4, a resistor R27, an inductor L2, a MOS tube Q1, a resistor R35, a resistor R31, a capacitor C16, a diode D2, an electrolytic capacitor C14, a resistor R17, a resistor R24, a resistor R33, a capacitor C17, a resistor R9, a triode VT3, a resistor R10, a resistor R11, a resistor R22, a resistor R20, a light emitting diode LD3, a diode D1, a fuse F1, a resistor R29, a resistor R23, a triode BQ5, a capacitor C18, a resistor R16, a resistor R34, a triode BQ1, a triode BQ7, a resistor R25, a resistor R14, a resistor R30, a resistor R13, and a capacitor C15.

[0014] One end of the fuse F2 is connected with VIN1, and VIN1 is the input voltage DC36V of the charger; the other end of the fuse F2 is connected with the positive electrode of the electrolytic capacitor C13, one end of the resistor R12, and the source electrode of the field effect tube VT1; the other end of the resistor R12 is connected with one end of the resistor R15 and one end of the resistor R19; the other end of the resistor R15 is connected with the gate electrode of the field effect tube VT1; one end of the resistor R28 is connected with the base electrode of the triode BQ3; the collector electrode of the triode BQ3 is connected with the other end of the resistor R19.

[0015] VIN1 is the input voltage DC36V of the charger; the fuse F2 is the input fuse of the charger; the capacitor C13 is the input voltage filter capacitor; the resistor R12, the resistor R15, and the resistor R19 constitute the drive of the P-channel field effect tube VT1.

[0016] One end of the resistor R32 is connected with the base of the transistor BQ6, the collector of the transistor BQ6 is connected with the base of the transistor BQ4 and one end of the resistor R21 respectively, the collector of the transistor BQ4 is connected with the base of the transistor BQ2, the base of the transistor VT4 and one end of the resistor R18 respectively, the emitter of the transistor BQ2 is connected with the emitter of the transistor VT4 and one end of the resistor R27 respectively, the collector of the transistor BQ2 is connected with one end of the resistor R18, one end of the resistor R21, the drain of the field effect transistor VT1 and one end of the inductor L2 respectively; the other end of the resistor R28 is the CD-OnOff end and is connected with the single-chip microcomputer IC1; the other end of the resistor R32 is the CD-PWM end for PWM modulation and is connected with the single-chip microcomputer IC1;

[0017] The CD-OnOff makes the transistor BQ3 low or cut-off through the resistor R28 so that the VT1 is turned on.

[0018] The resistor R32, the resistor R21, the resistor R18, the transistor BQ6 and the transistor BQ4 constitute the driving transistor BQ2 and the transistor VT4 to drive the MOS transistor Q1 to turn on or cut off, and the resistor R27 plays a current limiting role.

[0019] The other end of the resistor R27 is connected with the gate of the MOS transistor Q1, the drain of the MOS transistor Q1 is connected with the other end of the inductor L2 and the anode of the diode D2 respectively, and the source of the MOS transistor Q1 is connected with one end of the resistor R35, one end of the resistor R31 and one end of the capacitor C16 respectively;

[0020] The cathode of the diode D2 is connected with the anode of the electrolytic capacitor C14, one end of the resistor R17, the emitter of the transistor VT3 and one end of the resistor R9 respectively, the other end of the resistor R17 is connected with one end of the resistor R24 and one end of the resistor R33 respectively, and the other end of the resistor R24 is connected with one end of the capacitor C17;

[0021] The resistor R35 is used for current sampling when the MOS transistor Q1 is turned on, the resistor R31 is used for preventing the damage of the ADC pin of the single-chip microcomputer caused by the excessively high voltage, and the capacitor C16 is used for sampling filtering to ensure the stability of the sampling voltage.

[0022] One end of the resistor R31 connected with the connection end of the capacitor C16 is the outCD-ANC end for ADC sampling of the single-chip microcomputer and is connected with the single-chip microcomputer IC1;

[0023] One end of the capacitor C17 is the inCD-ADC end for sampling PWM output voltage; the voltage at the cathode of the diode D2 is V2;

[0024] The base of the triode VT3 is connected with one end of the resistor R10, the other end of the resistor R9 is connected with the other end of the resistor R10, one end of the resistor R11, one end of the resistor R20 and the positive pole of the diode D1, the collector of the triode VT3 is connected with the other end of the resistor R11 and one end of the resistor R22 respectively, the other end of the resistor R20 is connected with the positive pole of the light emitting diode LD3;

[0025] The resistor R9, the resistor R10 and the triode VT3 constitute a current limiting to prevent overcurrent charging from damaging the battery, the current is I=Vbe / R9, Vbe is the voltage when the BE junction of the triode VT3 is turned on; the resistor R20 and the light emitting diode LD3 are charging indication lights, the LD3 is bright when charging, and vice versa;

[0026] The negative pole of the diode D1 is connected with one end of the fuse F1 and one end of the resistor R29 respectively; the other end of the resistor R29 is connected with the base of the triode BQ5, the collector of the triode BQ5 is connected with one end of the resistor R23 and one end of the capacitor C18 respectively, the other end of the resistor R23 is connected with the output end VCC of the system power supply module; the connection end of the resistor R23 and the capacitor C18 is the CD-off end and is connected with the single-chip microcomputer IC1;

[0027] The inductor L2 plays a role of energy storage, D2 is a boost Schottky diode, the capacitor C14 makes the voltage after boosting be filtered and stored, the resistor R17, the resistor R33 and the resistor R24 sample the boost output, the sampling voltage of the inCD-ADC is V2*(R17 / (R17+R23), and the field effect tube VT1 is turned off when the output voltage is too high due to no load.

[0028] R29, R23 and BQ5 constitute a protection function when the charging output is found to be short-circuited, the CD-off gives a signal to the single-chip microcomputer to control the MOS tube VT1 to be turned off, C18 filters the detection signal to prevent high-frequency interference.

[0029] The emitter of the triode BQ1 is connected with one end of the resistor R16 and the negative pole of the diode D1 respectively, the base of the triode BQ1 is connected with the other end of the resistor R16 and one end of the resistor R25 respectively, the other end of the resistor R25 is connected with the collector of the triode BQ7, the base of the triode BQ7 is connected with one end of the resistor R34; the collector of the triode BQ1 is connected with one end of the resistor R14;

[0030] The diode D1 prevents the battery voltage from being turned on in reverse direction; F1 is a fuse during charging to ensure that the current does not overcurrent.

[0031] The other end of the resistor R34 is the CD-AD-EN end and is connected with the single-chip microcomputer IC1;

[0032] The other end of the resistor R14 is connected with the one end of the resistor R13 and the one end of the resistor R30 respectively, the other end of the resistor R13 is a voltage sampling terminal CD-ADC, and the other end of the resistor R13 is also connected with the one end of the capacitor C15.

[0033] The resistor R14, the resistor R13 and the resistor R30 constitute a voltage sampling for the battery, judge whether the battery voltage is full, and the battery voltage sampling function is controlled by the transistor BQ1, the resistor R16, the resistor R25, the transistor BQ7 and the resistor R34, when the CD-AD-EN is high, the battery voltage sampling is allowed, otherwise the CD-AD-EN is low, the battery voltage sampling is not allowed, that is, the battery will not discharge after being disconnected.

[0034] As preferred, the single-chip microcomputer module further comprises a capacitor C7, an inductor L1, a resistor R2, a capacitor C3, a resistor R4, a crystal oscillator B1, a capacitor C9, a capacitor C10, a light-emitting diode LD2, a resistor R6, a capacitor C1, a resistor R1, a resistor R5, a capacitor C11 and a capacitor C2.

[0035] The BOOT0 end of the single-chip microcomputer IC1 is grounded through the resistor R1, the VSSA end of the single-chip microcomputer IC1 is connected with the one end of the capacitor C7, and the VDDA end of the single-chip microcomputer IC1 is connected with the one end of the inductor L1 and the other end of the capacitor C7 respectively; the other end of the inductor L1 is connected with the one end of the resistor R2, and the other end of the resistor R2 is connected with the one end of the capacitor C3 and the NRST end of the single-chip microcomputer IC1 respectively.

[0036] The PA0 end of the single-chip microcomputer IC1 is defined as CD-ADC for voltage sampling of the circuit protection module; the PA2 end of the single-chip microcomputer IC1 is defined as outCD-ADC.

[0037] The PA4 end of the single-chip microcomputer IC1 is defined as inCD-ADC, the PA7 end of the single-chip microcomputer IC1 is defined as the LED end and connected with the one end of the resistor R6, the other end of the resistor R6 is connected with the positive electrode of the light-emitting diode LD2, and the negative electrode of the light-emitting diode LD2 is grounded.

[0038] The PB11 end of the single-chip microcomputer IC1 is defined as CD-OnOff.

[0039] The PB7 end of the single-chip microcomputer IC1 is defined as CD-off, and the PB6 end of the single-chip microcomputer IC1 is defined as CD-AD-EN.

[0040] The single-chip IC1PA13 end is defined as JIMS; the single-chip IC1PA12 end is defined as CAN1_TX, the single-chip IC1PA11 end is defined as CAN1_RX, the single-chip IC1PA10 end is defined as UART1_RX, the single-chip IC1PA9 end is defined as UART1_TX, the single-chip IC1PA8 end is defined as CD-PWM, the single-chip IC1PB15 end is defined as PIN1, the single-chip IC1PB14 end is defined as PIN2, the single-chip IC1PB13 end is defined as PIN3, and the single-chip IC1PB12 end is defined as PIN4.

[0041] As preferred, the system power supply module comprises a step-down chip U1, a capacitor C8, a capacitor C4, a capacitor C6, a capacitor C5 and a socket P1, the first pin of the socket P1 is connected with the positive pole of the capacitor C8, one end of the capacitor C4 and the input end of the step-down chip U1, the voltage VCC of the output end of the step-down chip is connected with the positive pole of the capacitor C6 and one end of the capacitor C5, and the third pin and the fourth pin of the socket P1 are connected with the CAN communication module.

[0042] As preferred, the input of the step-down chip U1 is 5V and the output is 3.3V.

[0043] The step-down chip U1 converts 5V to 3.3V to supply power to the single-chip system.

[0044] As preferred, the CAN communication module comprises a high-speed CAN transceiver U2, a resistor R7, a resistor EM1, a resistor EM2, a light-emitting diode LD1, a resistor R3, a resistor R8 and a capacitor C12.

[0045] The CNAL end of the high-speed CAN transceiver U2 is connected with one end of the resistor R7 and one end of the resistor EM1, the CANH end of the high-speed CAN transceiver U2 is connected with the other end of the resistor R7 and one end of the resistor EM2, and the RS end of the high-speed CAN transceiver U2 is connected with one end of the resistor R8.

[0046] The voltage VCC of the output end of the step-down chip is connected with the VCC end of the high-speed CAN transceiver U2 and one end of the capacitor C12, the TXD end and the RXD end of the high-speed CAN transceiver U2 are connected with the single-chip IC1, the TXD end of the high-speed CAN transceiver U2 is further connected with the negative pole of the light-emitting diode LD1, the positive pole of the light-emitting diode LD1 is connected with one end of the resistor R3, and the other end of the resistor R3 has a voltage of VCC.

[0047] The high-speed CAN transceiver U2, the resistor R8, the capacitor C12, the resistor R7, the resistor EM1 and the resistor EM2 constitute the CAN communication, all charging states send information through the CAN line, and the light-emitting diode LD1 and the resistor R3 are CAN information sending indicator lights to prompt the user of the communication state.

[0048] Therefore, the present application has the following advantages:

[0049] The present application adopts 36V power supply, has short circuit and open circuit protection function, overcurrent protection function, ensures that the components are not damaged, the single-chip microcomputer and its power supply module carry out PWM modulation on the circuit protection module, when the battery voltage is at a certain value, the output voltage is higher than the battery voltage through PWM adjustment, the battery is charged, the PWM adjustment current size is fed back through sampling voltage; the sampling PWM output voltage is closed when the output voltage is too high, and the charger is protected; the circuit protection module can also protect the battery from overcharging; the circuit protection module prompts whether the charging state; since the voltages of lithium batteries and lead-acid batteries are different, the battery voltage is sampled, and when it is charged to a certain voltage value, it is closed to achieve the protection effect; when the power is off, the circuit is still connected with the charger, and in the prior art, the battery circuit protection module is discharged at ordinary times, which is not good for the service life of the battery; when the single-chip microcomputer module detects a high level, it is quickly closed, which plays a rapid protection role; the CAN communication module communicates with the single-chip microcomputer module of the fire-fighting system and uploads the charging source state at regular intervals. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 is the circuit principle diagram of the circuit protection module of the present embodiment.

[0051] Figure 2 is the circuit principle diagram of the single-chip microcomputer and its power supply module of the present embodiment.

[0052] Figure 3 is the circuit principle diagram of the CAN communication module of the present embodiment.

[0053] Figure 4 is the structure block diagram of the present embodiment.

[0054] In the figure: 1, circuit protection module 2, single-chip microcomputer and its power supply module 21, single-chip microcomputer module 22, system power supply module 3, CAN communication module. DETAILED DESCRIPTION

[0055] The present application will be further described below in combination with the drawings and specific embodiments.

[0056] Embodiment:

[0057] The present embodiment provides a fire-fighting power supply charger, as shown in Figure 4 , comprising:

[0058] The circuit protection module 1 comprises a field effect transistor VT1, which provides open circuit and short circuit protection.

[0059] The single-chip microcomputer and its power supply module 2 control the charger through the sampling circuit protection module 1.

[0060] The CAN communication module 3 sends the charging state information to prompt the user of the charging state;

[0061] The circuit protection module 1 and the CAN communication module 3 are connected with the single-chip microcomputer and the power supply module 2 thereof;

[0062] The single-chip microcomputer and the power supply module 2 thereof comprise a single-chip microcomputer module 21 and a system power supply module 22 connected with each other.

[0063] The single-chip microcomputer module adopts a single-chip microcomputer IC1.

[0064] As shown in Figure 1 the circuit protection module further comprises a fuse F2, an electrolytic capacitor C13, a resistor R12, a resistor R15, a resistor R19, a resistor R28, a triode BQ1, a resistor R32, a resistor R21, a resistor R18, a triode BQ6, a triode BQ4, a triode BQ2, a triode VT4, a resistor R27, an inductor L2, a MOS tube Q1, a resistor R35, a resistor R31, a capacitor C16, a diode D2, an electrolytic capacitor C14, a resistor R17, a resistor R24, a resistor R33, a capacitor C17, a resistor R9, a triode VT3, a resistor R10, a resistor R11, a resistor R22, a resistor R20, a light-emitting diode LD3, a diode D1, a fuse F1, a resistor R29, a resistor R23, a triode BQ5, a capacitor C18, a resistor R16, a resistor R34, a triode BQ1, a triode BQ7, a resistor R25, a resistor R14, a resistor R30, a resistor R13, and a capacitor C15.

[0065] One end of the fuse F2 is connected with VIN1, and VIN1 is a charger input voltage DC36V. The other end of the fuse F2 is connected with the positive electrode of the electrolytic capacitor C13, one end of the resistor R12, and the source electrode of the field effect tube VT1, respectively. The other end of the resistor R12 is connected with one end of the resistor R15 and one end of the resistor R19, respectively. The other end of the resistor R15 is connected with the gate electrode of the field effect tube VT1. One end of the resistor R28 is connected with the base electrode of the triode BQ3, and the collector electrode of the triode BQ3 is connected with the other end of the resistor R19.

[0066] VIN1 is a charger input voltage DC36V, the fuse F2 is a charging input fuse, the capacitor C13 is an input voltage filter capacitor, and the resistor R12, the resistor R15, and the resistor R19 constitute the driving of the P-channel field effect tube VT1.

[0067] The one end of the resistor R32 is connected with the base of the transistor BQ6, the collector of the transistor BQ6 is connected with the base of the transistor BQ4 and the one end of the resistor R21 respectively, the collector of the transistor BQ4 is connected with the base of the transistor BQ2, the base of the transistor VT4 and the one end of the resistor R18 respectively, the emitter of the transistor BQ2 is connected with the emitter of the transistor VT4 and the one end of the resistor R27 respectively, the collector of the transistor BQ2 is connected with the one end of the resistor R18, the one end of the resistor R21, the drain of the field effect transistor VT1 and the one end of the inductor L2 respectively; the other end of the resistor R28 is the CD-OnOff end and is connected with the single-chip microcomputer IC1; the other end of the resistor R32 is the CD-PWM end for PWM modulation and is connected with the single-chip microcomputer IC1;

[0068] The CD-OnOff is connected with the resistor R28 to pull down or cut off the transistor BQ3 so that the VT1 is turned on.

[0069] The resistor R32, the resistor R21, the resistor R18, the transistor BQ6 and the transistor BQ4 constitute the driving transistor BQ2 and the transistor VT4 to drive the MOS transistor Q1 to be turned on or cut off, and the resistor R27 plays a current limiting role.

[0070] The other end of the resistor R27 is connected with the gate of the MOS transistor Q1, the drain of the MOS transistor Q1 is connected with the other end of the inductor L2 and the anode of the diode D2 respectively, and the source of the MOS transistor Q1 is connected with the one end of the resistor R35, the one end of the resistor R31 and the one end of the capacitor C16 respectively;

[0071] The cathode of the diode D2 is connected with the anode of the electrolytic capacitor C14, the one end of the resistor R17, the emitter of the transistor VT3 and the one end of the resistor R9 respectively, the other end of the resistor R17 is connected with the one end of the resistor R24 and the one end of the resistor R33 respectively, and the other end of the resistor R24 is connected with the one end of the capacitor C17;

[0072] The resistor R35 is used for current sampling when the MOS transistor Q1 is turned on, the resistor R31 is used for preventing the damage of the ADC pin of the single-chip microcomputer caused by the over-high voltage, and the capacitor C16 is used for sampling filtering to ensure the stable sampling voltage.

[0073] The one end of the resistor R31 connected with the connection end of the capacitor C16 is the outCD-ANC end for ADC sampling of the single-chip microcomputer and is connected with the single-chip microcomputer IC1;

[0074] The one end of the capacitor C17 is the inCD-ADC end for sampling PWM output voltage; and the cathode voltage of the diode D2 is V2.

[0075] The base of the triode VT3 is connected with one end of the resistor R10, the other end of the resistor R9 is connected with the other end of the resistor R10, one end of the resistor R11, one end of the resistor R20 and the positive pole of the diode D1, the collector of the triode VT3 is connected with the other end of the resistor R11 and one end of the resistor R22 respectively, the other end of the resistor R20 is connected with the positive pole of the light emitting diode LD3;

[0076] The resistor R9, the resistor R10 and the triode VT3 constitute a current limiting to prevent overcurrent charging from damaging the battery, the current is I=Vbe / R9, Vbe is the voltage when the BE junction of the triode VT3 is turned on; the resistor R20 and the light emitting diode LD3 are charging indication lights, the LD3 is bright when charging, and vice versa;

[0077] The negative pole of the diode D1 is connected with one end of the fuse F1 and one end of the resistor R29 respectively; the other end of the resistor R29 is connected with the base of the triode BQ5, the collector of the triode BQ5 is connected with one end of the resistor R23 and one end of the capacitor C18 respectively, the other end of the resistor R23 is connected with the output end VCC of the system power supply module; the connection end of the resistor R23 and the capacitor C18 is the CD-off end and is connected with the single-chip microcomputer IC1;

[0078] The inductor L2 plays a role of energy storage, D2 is a boost Schottky diode, the capacitor C14 makes the voltage after boosting be filtered and stored, the resistor R17, the resistor R33 and the resistor R24 sample the boost output, the sampling voltage of the inCD-ADC is V2*(R17 / (R17+R23), and the MOS tube VT1 is turned off when the output voltage is too high due to no load.

[0079] R29, R23 and BQ5 constitute a protection function when the charging output is found to be short-circuited, the CD-off gives a signal to the single-chip microcomputer to control the MOS tube VT1 to be turned off, C18 filters the detection signal to prevent high-frequency interference.

[0080] The emitter of the triode BQ1 is connected with one end of the resistor R16 and the negative pole of the diode D1 respectively, the base of the triode BQ1 is connected with the other end of the resistor R16 and one end of the resistor R25 respectively, the other end of the resistor R25 is connected with the collector of the triode BQ7, the base of the triode BQ7 is connected with one end of the resistor R34; the collector of the triode BQ1 is connected with one end of the resistor R14;

[0081] The diode D1 prevents the battery voltage from being reversely turned on; F1 is a fuse during charging to ensure that the current does not overcurrent.

[0082] The other end of the resistor R34 is the CD-AD-EN end and is connected with the single-chip microcomputer IC1;

[0083] The other end of the resistor R14 is connected with the one end of the resistor R13 and the one end of the resistor R30 respectively, the other end of the resistor R13 is a voltage sampling terminal CD-ADC, and the other end of the resistor R13 is also connected with the one end of the capacitor C15.

[0084] The resistor R14, the resistor R13 and the resistor R30 constitute a voltage sampling circuit for the battery, judge whether the battery voltage is full, and the battery voltage sampling function is controlled by the transistor BQ1, the resistor R16, the resistor R25, the transistor BQ7 and the resistor R34, when the CD-AD-EN is high, the battery voltage sampling is allowed, otherwise the CD-AD-EN is low, the battery voltage sampling is not allowed, that is, the battery will not discharge after being disconnected.

[0085] As shown in Figure 2 , the single-chip microcomputer module 21 further includes the capacitor C7, the inductor L1, the resistor R2, the capacitor C3, the resistor R4, the crystal oscillator B1, the capacitor C9, the capacitor C10, the light-emitting diode LD2, the resistor R6, the capacitor C1, the resistor R1, the resistor R5, the capacitor C11 and the capacitor C2;

[0086] The BOOT0 end of the single-chip microcomputer IC1 is grounded through the resistor R1, the VSSA end of the single-chip microcomputer IC1 is connected with the one end of the capacitor C7, and the VDDA end of the single-chip microcomputer IC1 is connected with the one end of the inductor L1 and the other end of the capacitor C7 respectively; the other end of the inductor L1 is connected with the one end of the resistor R2, and the other end of the resistor R2 is connected with the one end of the capacitor C3 and the NRST end of the single-chip microcomputer IC1 respectively;

[0087] The PA0 end of the single-chip microcomputer IC1 is defined as CD-ADC for voltage sampling of the circuit protection module; the PA2 end of the single-chip microcomputer IC1 is defined as outCD-ADC;

[0088] The PA4 end of the single-chip microcomputer IC1 is defined as inCD-ADC, the PA7 end of the single-chip microcomputer IC1 is defined as the LED end and connected with the one end of the resistor R6, the other end of the resistor R6 is connected with the anode of the light-emitting diode LD2, and the cathode of the light-emitting diode LD2 is grounded;

[0089] The PB11 end of the single-chip microcomputer IC1 is defined as CD-OnOff;

[0090] The PB7 end of the single-chip microcomputer IC1 is defined as CD-off; and the PB6 end of the single-chip microcomputer IC1 is defined as CD-AD-EN;

[0091] The single-chip IC1PA13 end is defined as JIMS; the single-chip IC1PA12 end is defined as CAN1_TX, the single-chip IC1PA11 end is defined as CAN1_RX, the single-chip IC1PA10 end is defined as UART1_RX, the single-chip IC1PA9 end is defined as UART1_TX, the single-chip IC1PA8 end is defined as CD-PWM, the single-chip IC1PB15 end is defined as PIN1, the single-chip IC1PB14 end is defined as PIN2, the single-chip IC1PB13 end is defined as PIN3, and the single-chip IC1PB12 end is defined as PIN4.

[0092] The system power supply module 22 comprises a voltage reduction chip U1, a capacitor C8, a capacitor C4, a capacitor C6, a capacitor C5 and a socket P1. The first pin of the socket P1 is connected with the positive pole of the capacitor C8, one end of the capacitor C4 and the input end of the voltage reduction chip U1, respectively. The voltage VCC of the output end of the voltage reduction chip is 3.3V, which is connected with the positive pole of the capacitor C6 and one end of the capacitor C5, respectively. The third pin and the fourth pin of the socket P1 are connected with the CAN communication module.

[0093] The voltage reduction chip U1 converts 5V into 3.3V to supply power to the single-chip system.

[0094] The capacitor C4 and the capacitor C8 filter the input DC 5V of the voltage reduction chip U1, and the capacitor C5 and the capacitor C6 filter the VCC.

[0095] As shown in Figure 3 , the CAN communication module comprises a high-speed CAN transceiver U2, a resistor R7, a resistor EM1, a resistor EM2, a light-emitting diode LD1, a resistor R3, a resistor R8 and a capacitor C12.

[0096] The CNAL end of the high-speed CAN transceiver U2 is connected with one end of the resistor R7 and one end of the resistor EM1, respectively. The CANH end of the high-speed CAN transceiver U2 is connected with the other end of the resistor R7 and one end of the resistor EM2, respectively. The RS end of the high-speed CAN transceiver U2 is connected with one end of the resistor R8.

[0097] The voltage VCC of the output end of the voltage reduction chip is connected with the VCC end of the high-speed CAN transceiver U2 and one end of the capacitor C12, respectively. The TXD end and the RXD end of the high-speed CAN transceiver U2 are connected with the single-chip IC1. The TXD end of the high-speed CAN transceiver U2 is also connected with the negative pole of the light-emitting diode LD1. The positive pole of the light-emitting diode LD1 is connected with one end of the resistor R3. The other end of the resistor R3 is connected with the voltage VCC.

[0098] High-speed CAN transceiver U2, resistance R8, capacitor C12, resistance R7, resistance EM1, resistance EM2 are composed of CAN communication, all charging state is information sent through CAN line, light emitting diode LD1, resistance R3 is CAN sending information indicating light bright to prompt user communication state.

[0099] The working principle of the present application is as follows: DC 36V power supply; the main function of CD-OnOff is short circuit and open circuit protection, the fuse F2 plays the overcurrent protection, and the components are guaranteed not to be damaged; the function of CD-PWM is PWM modulation, when the battery voltage is at a certain value, the PWM regulation is passed to make the output voltage higher than the battery voltage, and the battery is charged, the sampling voltage is sampled through the resistance R35, and the sampling end outCD-ADC feedbacks the PWM regulation current size; inCD-ADC samples the PWM output voltage, when the output voltage is too high, CD-OnOff is closed to protect the charger; the resistance R9 and the triode VT3 form a highest current limiting effect, I=VBE / R9, which achieves overcharge protection for the battery; the light emitting diode LD3 prompts whether the charging state; since the voltage of lithium battery and lead-acid battery is different, CD-ADC samples the battery voltage, when the voltage reaches a certain value, CD-OnOff is closed to achieve protection effect; when the CD-AD-EN is off, the circuit is still connected with the charger, if the triode BQ1 and the triode BQ7 part are not added, the battery will discharge to the resistance R14 and the resistance R30 at ordinary times, which greatly affects the service life of the battery; when CD-off detects high level, CD-OnOff is quickly closed to achieve rapid protection; the CAN communication module communicates with the single-chip microcomputer of the fire fighting system, and the charging source state is uploaded in time; the switching power supply VIN1 outputs direct current, DC 36V, and the other end of the fuse F1 is connected to the battery positive electrode to charge the battery.

[0100] The above embodiments are only used for further description of the present application, and cannot be understood as the limitation of the protection scope of the present application. The skilled engineer in the art can make some non-essential improvements and adjustments to the present application according to the content of the above application, which falls within the protection scope of the present application.

Claims

1. A fire service power charger, characterized in that, The application relates to a circuit protection module (1) comprising a field effect tube VT1, which provides open circuit and short circuit protection. A single-chip microcomputer and a power supply module (2) control a charger by sampling the circuit protection module (1); A CAN communication module (3) sends charging state information to prompt a user of the charging state; The circuit protection module (1) and the CAN communication module (3) are connected with the single-chip microcomputer and the power supply module (2); The single-chip microcomputer and the power supply module (2) comprise a single-chip microcomputer module (21) and a system power supply module (22) connected with each other; The single-chip microcomputer module (21) adopts a single-chip microcomputer IC1; The circuit protection module (1) further comprises a fuse F2, an electrolytic capacitor C13, a resistor R12, a resistor R15, a resistor R19, a resistor R28, a triode BQ1, a resistor R32, a resistor R21, a resistor R18, a triode BQ6, a triode BQ4, a triode BQ2, a triode VT4, a resistor R27, an inductor L2, a MOS tube Q1, a resistor R35, a resistor R31, a capacitor C16, a diode D2, an electrolytic capacitor C14, a resistor R17, a resistor R24, a resistor R33, a capacitor C17, a resistor R9, a triode VT3, a resistor R10, a resistor R11, a resistor R22, a resistor R20, a light emitting diode LD3, a diode D1, a fuse F1, a resistor R29, a resistor R23, a capacitor C18, a resistor R16, a resistor R34, a triode BQ1, a triode BQ7, a resistor R25, a resistor R14, a resistor R30, a resistor R13 and a capacitor C15; One end of the fuse F2 is connected with a VIN1, the VIN1 is a charger input voltage DC36V, the other end of the fuse F2 is connected with a positive electrode of the electrolytic capacitor C13, one end of the resistor R12 and a source electrode of the field effect tube VT1, the other end of the resistor R12 is connected with one end of the resistor R15 and one end of the resistor R19, the other end of the resistor R15 is connected with a gate electrode of the field effect tube VT1; one end of the resistor R28 is connected with a base electrode of the triode BQ3, a collector electrode of the triode BQ3 is connected with the other end of the resistor R19; One end of the resistor R32 is connected with a base electrode of the triode BQ6, a collector electrode of the triode BQ6 is connected with a base electrode of the triode BQ4 and one end of the resistor R21, a collector electrode of the triode BQ4 is connected with a base electrode of the triode BQ2, a base electrode of the triode VT4 and one end of the resistor R18, an emitter electrode of the triode BQ2 is connected with an emitter electrode of the triode VT4 and one end of the resistor R27, a collector electrode of the triode BQ2 is connected with one end of the resistor R18, one end of the resistor R21, a drain electrode of the field effect tube VT1 and one end of the inductor L2; the other end of the resistor R28 is a CD-OnOff end and is connected with the single-chip microcomputer IC1; the other end of the resistor R32 is a CD-PWM end for PWM modulation and is connected with the single-chip microcomputer IC1; The other end of the resistor R27 is connected with a gate electrode of the MOS tube Q1, a drain electrode of the MOS tube Q1 is connected with the other end of the inductor L2 and a positive electrode of the diode D2, a source electrode of the MOS tube Q1 is connected with one end of the resistor R35, one end of the resistor R31 and one end of the capacitor C16; ​ The negative electrode of diode D2 is connected with the positive electrode of electrolytic capacitor C14, one end of resistor R17, the emitter of triode VT3 and one end of resistor R9 respectively, the other end of resistor R17 is connected with one end of resistor R24 and one end of resistor R33 respectively, the other end of resistor R24 is connected with one end of capacitor C17; One end of resistor R31 is connected with the connection end of capacitor C16, which is the outCD-ANC end of single-chip microcomputer ADC sampling and is connected with single-chip microcomputer IC1; One end of capacitor C17 is the inCD-ADC end of sampling PWM output voltage, and the negative electrode voltage of diode D2 is V2; The base of triode VT3 is connected with one end of resistor R10, the other end of resistor R9 is connected with the other end of resistor R10, one end of resistor R11, one end of resistor R20 and the positive electrode of diode D1, the collector of triode VT3 is connected with the other end of resistor R11 and one end of resistor R22 respectively, the other end of resistor R20 is connected with the positive electrode of light-emitting diode LD3; The negative electrode of diode D1 is connected with one end of fuse F1 and one end of resistor R29 respectively, the other end of resistor R29 is connected with the base of triode BQ5, the collector of triode BQ5 is connected with one end of resistor R23 and one end of capacitor C18 respectively, the other end of resistor R23 is connected with the output end VCC of system power supply module (22), the connection end of resistor R23 and capacitor C18 is the CD-off end and is connected with single-chip microcomputer IC1; The emitter of triode BQ1 is connected with one end of resistor R16 and the negative electrode of diode D1 respectively, the base of triode BQ1 is connected with the other end of resistor R16 and one end of resistor R25 respectively, the other end of resistor R25 is connected with the collector of triode BQ7, the base of triode BQ7 is connected with one end of resistor R34, the collector of triode BQ1 is connected with one end of resistor R14; The other end of resistor R34 is the CD-AD-EN end and is connected with single-chip microcomputer IC1; The other end of resistor R14 is connected with one end of resistor R13 and one end of resistor R30 respectively, the other end of resistor R13 is the voltage sampling end CD-ADC, and the other end of resistor R13 is also connected with one end of capacitor C15.

2. A fire power charger according to claim 1, characterized in that The single-chip microcomputer module (21) further comprises capacitor C7, inductor L1, resistor R2, capacitor C3, resistor R4, crystal B1, capacitor C9, capacitor C10, light-emitting diode LD2, resistor R6, capacitor C1, resistor R1, resistor R5, capacitor C11 and capacitor C2; The BOOT0 end of single-chip microcomputer IC1 is grounded through resistor R1, the VSSA end of single-chip microcomputer IC1 is connected with one end of capacitor C7, and the VDDA end of single-chip microcomputer IC1 is connected with one end of inductor L1 and the other end of capacitor C7 respectively; The other end of inductor L1 is connected with one end of resistor R2, the other end of resistor R2 is connected with one end of capacitor C3 and the NRST end of single-chip microcomputer IC1 respectively, and the PA0 end of single-chip microcomputer IC1 is defined as CD-ADC for voltage sampling of circuit protection module (1); The PA2 end of single-chip microcomputer IC1 is defined as outCD-ADC; The single-chip IC1PA4 end is defined as inCD-ADC, the single-chip IC1PA7 end is defined as LED end and is connected with one end of the resistor R6, the other end of the resistor R6 is connected with the positive electrode of the light-emitting diode LD2, and the negative electrode of the light-emitting diode LD2 is grounded. The single-chip IC1PB11 end is defined as CD-OnOff. The single-chip IC1PB7 end is defined as CD-off, and the single-chip IC1PB6 end is defined as CD-AD-EN. The single-chip IC1PA13 end is defined as JIMS, the single-chip IC1PA12 end is defined as CAN1_TX, the single-chip IC1PA11 end is defined as CAN1_RX, the single-chip IC1PA10 end is defined as UART1_RX, the single-chip IC1PA9 end is defined as UART1_TX, the single-chip IC1PA8 end is defined as CD-PWM, the single-chip IC1PB15 end is defined as PIN1, the single-chip IC1PB14 end is defined as PIN2, the single-chip IC1PB13 end is defined as PIN3, and the single-chip IC1PB12 end is defined as PIN4.

3. A fire power charger as claimed in claim 1, wherein, The system power supply module (22) comprises a step-down chip U1, capacitors C8, C4, C6, C5 and a socket P1, the first pin of the socket P1 is connected with the positive electrode of the capacitor C8, one end of the capacitor C4 and the input end of the step-down chip U1, the output end voltage VCC of the step-down chip is 3.3V, and is connected with the positive electrode of the capacitor C6 and one end of the capacitor C5, and the third pin and the fourth pin of the socket P1 are connected with the CAN communication module (3).

4. A fire power charger as claimed in claim 3, wherein, The input of the step-down chip U1 is 5V, and the output is 3.3V.

5. A fire power charger as claimed in claim 3, wherein, The CAN communication module (3) comprises a high-speed CAN transceiver U2, resistors R7, EM1 and EM2, a light-emitting diode LD1, resistors R3 and R8 and a capacitor C12. The CNAL end of the high-speed CAN transceiver U2 is connected with one end of the resistor R7 and one end of the resistor EM1, the CANH end of the high-speed CAN transceiver U2 is connected with the other end of the resistor R7 and one end of the resistor EM2, and the RS end of the high-speed CAN transceiver U2 is connected with one end of the resistor R8. The output end voltage VCC of the step-down chip is connected with the VCC end of the high-speed CAN transceiver U2 and one end of the capacitor C12, the TXD end and the RXD end of the high-speed CAN transceiver U2 are connected with the single-chip IC1, the TXD end of the high-speed CAN transceiver U2 is further connected with the negative electrode of the light-emitting diode LD1, the positive electrode of the light-emitting diode LD1 is connected with one end of the resistor R3, and the other end of the resistor R3 has a voltage of VCC.

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