CN219590478U - Electric car discharging and driving system state detection circuit - Google Patents

Abstract

The utility model provides a state detection circuit of a trolley discharging and driving system, and relates to the field of state detection circuits. The circuit comprises a power supply unit, a TSAL output unit, an AIR state detection unit, a TSAL safety state unit, a voltage ambiguity unit, an isolation power supply unit and a voltage threshold setting unit which are connected with the power supply unit respectively, and further comprises a discharge loop unit, wherein the AIR state detection unit, the voltage ambiguity unit and the voltage threshold setting unit are connected with the discharge loop unit respectively, and the TSAL output unit is connected with the voltage threshold setting unit after being sequentially connected with the AIR state detection unit, the TSAL safety state unit, the voltage ambiguity unit and the isolation power supply unit, and is further connected with an external measuring point, and the TSAL output unit is further connected with a power supply end of the TSAL. The circuit can be used for safely and effectively discharging and detecting the trolley high-voltage system.

Description

Electric car discharging and driving system state detection circuit

Technical Field

The utility model relates to the field of state detection circuits, in particular to a state detection circuit of a trolley discharging and driving system.

Background

In recent years, new energy automobiles are developed at a high speed, and most of power batteries of current electric vehicles adopt a mode of connecting a plurality of single batteries in series and parallel, the working voltage reaches hundreds of volts, and the discharging current reaches hundreds of amperes, so that the power batteries are carefully treated according to the high-voltage safety requirement of the power batteries, and the power batteries are ensured to have no potential safety hazard. In addition, the motor controller is inductive, and when the battery is disconnected, higher voltage still exists in the motor controller, which may damage the life and property safety. That is, how to discharge and detect the safety and effectiveness of the existing high-voltage system of the new energy automobile is a problem to be solved.

In order to solve the above problems, in the chinese patent of disclosure No. CN216792399U, by setting voltage comparators at two ends of each electric core of the battery, it is possible to implement separate detection of voltage of each electric core in the battery, and when the battery is used or charged, the state of each electric core can be separately detected and fed back through a feedback circuit, so that after a single electric core is full, the electric core is stopped to be charged in time, or after a certain electric core fails, the electric equipment is protected by timely power failure. However, the battery protection device can simply detect a single battery cell, and the battery protection device can realize the protection of the battery by using an early warning function, and the reliability and the practicability of a high-voltage system of a power battery still cannot reach satisfactory degrees.

Disclosure of Invention

In order to overcome the above problems or at least partially solve the above problems, embodiments of the present utility model provide a state detection circuit for a discharge and driving system of an electric vehicle, which can be used for detecting ambiguity between an internal voltage of a battery box and a voltage of a motor controller, and detecting a relay signal in the battery box, and in a failure state, a capacitor in a high-voltage loop can still be discharged through a discharge loop unit, so that the reliability is strong, and the safety of the high-voltage system can be ensured.

Embodiments of the present utility model are implemented as follows:

the embodiment of the utility model provides a trolley bus discharging and driving system state detection circuit which comprises a power supply unit, a TSAL output unit, an AIR state detection unit, a TSAL safety state unit, a voltage ambiguity unit, an isolation power supply unit and a voltage threshold setting unit which are respectively connected with the power supply unit, and further comprises a discharging loop unit, wherein the AIR state detection unit, the voltage ambiguity unit and the voltage threshold setting unit are respectively connected with the discharging loop unit, the TSAL output unit is further connected with the voltage threshold setting unit after sequentially connected with the AIR state detection unit, the TSAL safety state unit, the voltage ambiguity unit and the isolation power supply unit, the voltage ambiguity unit is further connected with an external measuring point, and the TSAL output unit is further connected with a power supply end of the TSAL.

In some embodiments of the present utility model, the power supply unit includes a diode D2, a light emitting diode D4, a capacitor C3, a resistor R20, and a power supply chip U2. The positive pole of diode D2 is used for connecting with outside DC power VCC_24V, and the negative pole of diode D2 passes through electric capacity C3 ground connection, and the negative pole of diode D2 still is connected with power chip U2's pin VIN+, and power chip U2's pin VOUT+ passes through resistance R20 and links to each other with emitting diode D4's positive pole, and emitting diode D4's pin ground connection, and power chip U2's pin VOUT+ is used for output power VCC_5.

In some embodiments of the present utility model, the AIR state detecting unit includes an or gate chip U10, a low voltage plug P1, a resistor R58, a resistor R59, a resistor R60, a resistor R61, a resistor R62, a resistor R63, and a resistor R64. The pin VCC of the OR chip U10 is connected with a power supply VCC_5, the pin 3A of the OR chip U10 is connected with the pin 1 of the low-voltage plug P1, the pin 3B of the OR chip U10 is connected with the pin 2B of the OR chip U10 through a resistor R64 and a resistor R60 which are sequentially connected in series, the common ground of the resistor R64 and the resistor R60 is grounded, the pin 2B of the OR chip U10 is also connected with the pin 2 of the low-voltage plug P1 through a resistor R63, the pin 1A of the OR chip U10 is connected with the pin 1B of the OR chip U10 through a resistor R58 and a resistor R59 which are sequentially connected in series, the common ground of the resistor R58 and the resistor R59 is grounded, and the pin 1A of the OR chip U10 is also connected with the pin 4 of the low-voltage plug P1 through a resistor R61, and the pin 1B of the OR chip U10 is also connected with the pin 3 of the low-voltage plug P1 through a resistor R62.

In some embodiments of the present utility model, the TSAL output unit includes a relay K2, a relay K3, a transistor Q1, a transistor Q2, a connection terminal row J4, a diode D7, a diode D10, a light emitting diode D8, a light emitting diode D11, a resistor R33, a resistor R25, a resistor R27, a resistor R28, a resistor R30, a resistor R313, and a resistor R32. Terminals COM1 and COM2 of the relay K2 are connected to an external dc power supply vcc_24v after being connected, terminals NO1 and NO2 of the relay K2 are connected to a terminal 1 of the terminal block J4, the terminal 1 of the terminal block J4 is further grounded through a resistor R33, a terminal Coil1 of the relay K2 is connected to an anode of the diode D7, a terminal Coil2 of the relay K2 is connected to a cathode of the diode D7, a terminal Coil2 of the relay K2 is connected to a power supply vcc_5, a cathode of the diode D7 is connected to an anode of the light emitting diode D8 through a resistor R25, a cathode of the light emitting diode D8 is connected to an anode of the diode D7, an anode of the diode D7 is further connected to a collector of the triode Q1, a base of the triode Q1 is connected to an emitter of the triode Q1 through a resistor R28 and a resistor R27 which are sequentially connected in series, an emitter of the triode Q1 is grounded, and a common terminal of the resistor R28 and the resistor R27 is connected to a pin 3Y of the or gate chip U10. The wiring terminal row J4 is further used for being connected with a power supply end of the TSAL, the terminals COM1 and COM2 of the relay K3 are connected with the terminal 2 of the wiring terminal row J4, the terminals NO1 and NO2 of the relay K3 are connected with the terminal 3 of the wiring terminal row J4, the terminal Coil1 of the relay K3 is connected with the anode of the diode D10, the terminal Coil2 of the relay K3 is connected with the cathode of the diode D10, the terminal Coil2 of the relay K3 is connected with the power supply VCC_5, the cathode of the diode D10 is connected with the anode of the light emitting diode D11 through the resistor R30, the cathode of the light emitting diode D11 is connected with the anode of the diode D10, the anode of the diode D10 is also connected with the collector of the triode Q2, the base of the triode Q2 is connected with the emitter of the triode Q2 through the resistor R32 and the resistor R31 which are sequentially connected in series, the emitter of the resistor R32 and the common end of the resistor R31 are connected with the pin 7 of the low voltage plug P1.

In some embodiments of the present utility model, the TSAL security state unit includes an and gate chip U6, an exclusive or gate chip U7, a resistor R11, a resistor R13, a resistor RH, and a resistor R2. One end of a resistor R11 is connected with the pin 5 of the low-voltage plug P1, the other end of the resistor R11 is grounded through a resistor R13, the common end of the resistor R11 and the resistor R13 is connected with the pin 2B of the AND gate chip U6, the pin 2A of the AND gate chip U6 is connected with the pin 1Y of the AND gate chip U7, the pin 2Y of the AND gate chip U6 is connected with the pin 7 of the low-voltage plug P1, the pin VCC of the AND gate chip U6 is connected with the power VCC_5, the pin 1A of the AND gate chip U7 is grounded through the resistor R2, the pin 1B of the AND gate chip U7 is connected with the pin 3B of the OR gate chip U10, and the pin 1Y of the AND gate chip U7 is connected with the power VCC_5 through a resistor RH.

In some embodiments of the present utility model, the voltage ambiguity unit includes a photo coupler U4, a connection terminal row J1, a connection terminal row J3, a diode D12, a resistor R41, a resistor R42, a resistor R52, a resistor R53, a resistor R54, a resistor R55, a resistor R56, a resistor R57, a resistor R65, a resistor R66, a resistor R67, a resistor R68, and a resistor R69. Terminal 1 of terminal block J3 is connected with pin 2 of photo coupler U4 through resistor R52, resistor R53, resistor R54, resistor R55, resistor R56 and resistor R57 in series in this order, diode D12 is connected in parallel with resistor R57, terminal 2 of terminal block J3 is connected with terminal 1 of terminal block J1 through resistor R41, terminal 2 of terminal block J1 is connected with pin 1 of photo coupler U4 through resistor R42, resistor R69, resistor R68, resistor R67, resistor R66 and resistor R65 in series in this order, pin 4 of photo coupler U4 is connected with power vcc_5, pin 3 of photo coupler U4 is connected with pin 1A of exclusive or gate chip U7, and terminal 1 of terminal block J1 is also used for connecting with a measuring point.

In some embodiments of the present utility model, the voltage threshold setting unit includes an op-amp chip U3, a photo coupler U5, a sliding resistor R22, a capacitor C4, a resistor R17, a resistor R18, a resistor R78, and a resistor R24. The terminal 1 of the photoelectric coupler U5 is connected with the pin 2OUT of the operational amplifier chip U3 through a resistor R24, the terminal 2 of the photoelectric coupler U5 is connected with the pin 2 IN-of the operational amplifier chip U3, the terminal 3 of the photoelectric coupler U5 is connected with the pin 3B of the OR gate chip U10, the terminal 4 of the photoelectric coupler U5 is connected with the power VCC_5, the pin 1OUT of the operational amplifier chip U3 is connected with the pin 1 IN-of the operational amplifier chip U3 through a resistor R17, the pin 1OUT of the operational amplifier chip U3 is also connected with the pin 2OUT of the operational amplifier chip U3, the pin 1IN+ of the operational amplifier chip U3 is connected with the pin GND of the operational amplifier chip U3 through a resistor R18 and a capacitor C4 which are sequentially connected IN series, the common end of the resistor R18 and the capacitor C4 is connected with the cathode of the diode D12, the pin 1 IN-of the operational amplifier chip U3 is connected with the pin GND of the operational amplifier chip U3 through a resistor R78, the VCC of the operational amplifier chip U3 is connected with the pin GND of the operational amplifier chip U3 through a sliding resistor R22, and the pin of the sliding arm of the operational amplifier chip U3 is connected with the pin GND 2+ of the operational amplifier chip.

In some embodiments of the present utility model, the isolated power supply unit includes an isolated chip U1, an inductor L1, a light emitting diode D3, a capacitor C2, a capacitor C1, and a resistor R12. The pin +vo of the isolation chip U1 is connected with the pin VCC of the operational amplifier chip U3, the pin +vo of the isolation chip U1 is connected with the pin 0V of the isolation chip U1 through a capacitor C2, the pin +vo of the isolation chip U1 is connected with the anode of the light-emitting diode D3 through a resistor R12, the cathode of the light-emitting diode D3 is connected with the pin 0V of the isolation chip U1, the pin Vin of the isolation chip U1 is connected with the pin GND of the isolation chip U1 after sequentially connected with an inductor L1 and a capacitor C1 in series, the common end of the inductor L1 and the capacitor C1 is connected with a power supply VCC_5, and the pin 0V of the isolation chip U1 is also connected with a terminal 2 of the wiring terminal row J3.

In some embodiments of the present utility model, the discharge loop unit includes a relay K1, a diode D6, a terminal block J5, a terminal block J6, a light emitting diode D9, and a resistor R26. The diode D6 is connected with the relay K1 in parallel, the anode of the diode D6 is grounded, the cathode of the diode D6 is connected with the pin 11 of the low-voltage plug P1, the cathode of the diode D6 is connected with the anode of the light-emitting diode D9 through the resistor R26, the cathode of the light-emitting diode D9 is grounded, the terminal 2 of the wiring terminal row J5 is connected with the terminal 1 of the wiring terminal row J6, the terminal 1 of the wiring terminal row J5 is connected with the common end of the resistor R69 and the resistor R42, the terminal 2 of the wiring terminal row J6 is connected with the terminal 2 of the wiring terminal row J3, and the terminal 2 of the wiring terminal row J6 is also connected with the pin GND of the operational amplifier chip U3.

Compared with the prior art, the embodiment of the utility model has at least the following advantages or beneficial effects:

the embodiment of the utility model provides a state detection circuit of a discharging and driving system of an electric car, wherein a voltage ambiguity unit is respectively connected with a high-voltage battery and a motor controller, and then the voltage ambiguity unit can collect the voltages of the high-voltage battery and the motor controller, judge whether the voltages of the high-voltage battery and the motor controller are consistent or not through a gate logic circuit and an operation and amplification voltage, and output a response state signal corresponding to the consistent or inconsistent voltage to an indicator lamp so as to enable the indicator lamp to display whether the indicator lamp is consistent or not through the change of color, and is used for controlling a discharging loop unit to carry out closing discharging treatment when the voltage of the controller is released when the discharging loop unit is needed. In addition, it can change the voltage threshold by adjusting the voltage threshold setting unit to meet the requirements for different voltage value detection. That is, it can be used to detect battery box internal voltage and motor controller voltage ambiguity to detect battery box internal relay signal, and under the failure condition, the condenser in the high voltage return circuit still can discharge through the circuit unit that discharges, and the reliability is strong, can guarantee the security of high voltage system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a circuit configuration of an embodiment of a discharge and driving system status detection circuit for an electric vehicle according to the present utility model;

FIG. 2 is a schematic circuit diagram of a power supply unit according to an embodiment of a discharge and driving system status detection circuit of an electric car of the present utility model;

FIG. 3 is a schematic diagram of an AIR status detection unit according to an embodiment of a discharge and driving system status detection circuit of an electric vehicle;

FIG. 4 is a schematic circuit diagram of a TSAL output unit according to an embodiment of a state detection circuit of a discharging and driving system of an electric car of the present utility model;

FIG. 5 is a schematic circuit diagram of a TSAL safety state unit according to an embodiment of a trolley discharging and driving system state detection circuit of the present utility model;

FIG. 6 is a schematic circuit diagram of a voltage ambiguity unit according to an embodiment of a system for detecting a state of a discharging and driving system of an electric car;

FIG. 7 is a schematic diagram of a voltage threshold setting unit according to an embodiment of a system for detecting a state of a discharging and driving system of an electric vehicle;

FIG. 8 is a schematic diagram of an isolated power supply unit according to an embodiment of a system for detecting a state of a discharging and driving system of an electric vehicle;

fig. 9 is a schematic circuit diagram of a discharge loop unit of an embodiment of a discharge and driving system state detection circuit for an electric car according to the present utility model.

Icon: 1. a power supply unit; 2. a TSAL output unit; 3. an AIR state detection unit; 4. a TSAL security state unit; 5. a voltage ambiguity unit; 6. isolating the power supply unit; 7. a voltage threshold setting unit; 8. and a discharge loop unit.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The various embodiments and features of the embodiments described below may be combined with one another without conflict.

For ease of understanding, some technical terms will now be explained in unity:

TSAL: driving a system status indicator light;

AIR: the battery box insulating relay is used as a battery box main switch;

TS: a drive system.

Referring to fig. 1, the electric-car discharging and driving system state detection circuit includes a power supply unit 1, a TSAL output unit 2, an AIR state detection unit 3, a TSAL safety state unit 4, a voltage ambiguity unit 5, an isolation power supply unit 6, and a voltage threshold setting unit 7, which are respectively connected to the power supply unit, and further includes a discharging loop unit 8, where the AIR state detection unit 3, the voltage ambiguity unit 5, and the voltage threshold setting unit 7 are respectively connected to the discharging loop unit 8, and the TSAL output unit 2 is further connected to the voltage threshold setting unit 7 through the AIR state detection unit 3, the TSAL safety state unit 4, the voltage ambiguity unit 5, and the isolation power supply unit 6, which are sequentially connected, where the voltage ambiguity unit 5 is further connected to an external measurement point, and the TSAL output unit 2 is further connected to a power supply end of the TSAL.

In the above embodiment, after the voltage ambiguity unit 5 is connected to the high-voltage battery and the motor controller, it can collect the voltages of the high-voltage battery and the motor controller, then determine whether the voltages of the two parts are consistent through the gate logic circuit and the operational amplifier, and output a response status signal corresponding to the consistent or inconsistent voltage to the indicator lamp, so that the indicator lamp displays whether the indicator lamp is consistent through the color change, and is used for controlling the discharge loop unit 8 to perform the closed discharge treatment when the voltage of the controller is released when the controller is needed. In addition, it is possible to make a change in the voltage threshold value by adjusting the voltage threshold value setting unit 7 to meet the need for detection of different voltage values. That is, by providing a state detection circuit for a discharging and driving system of an electric car, the state detection circuit can be used for detecting ambiguity between the voltage in the battery box and the voltage of the motor controller and detecting the relay signal in the battery box, and in a failure state, the capacitor in the high-voltage loop can still be discharged through the discharging loop unit 8, so that the reliability is high, and the safety of the high-voltage system can be ensured. For a specific function of each unit thereof, reference is made to principle analysis performed in the circuit structure of the corresponding unit given in the following examples.

Referring to fig. 2, in some embodiments of the utility model, the power supply unit 1 includes a diode D2, a light emitting diode D4, a capacitor C3, a resistor R20, and a power chip U2. The positive pole of diode D2 is used for connecting with outside DC power VCC_24V, and the negative pole of diode D2 passes through electric capacity C3 ground connection, and the negative pole of diode D2 still is connected with power chip U2's pin VIN+, and power chip U2's pin VOUT+ passes through resistance R20 and links to each other with emitting diode D4's positive pole, and emitting diode D4's pin ground connection, and power chip U2's pin VOUT+ is used for output power VCC_5.

In the above embodiment, after the anode of the diode D2 is connected to the external dc power source vcc_24v, a corresponding power supply can be provided for the subsequent circuit, and the diode D2 can play a role in preventing reverse connection, and the capacitor C3 can play a role in filtering. In addition, the power supply chip U2 can adopt a DM02 type isolating switch power supply chip, thereby providing stable and effective 5V direct current power supply for a later-stage circuit. Of course, the power supply chip U2 may also be a 7805 non-isolated switching power supply chip, but the DM02 type of isolated switching power supply chip is preferably selected when high power is required and the ground wire interference protection requirement is high. The light emitting diode D4 is used as a power indicator lamp of the power source vcc_5.

Illustratively, the circuit ground and the power ground may be isolated by resistors or magnetic beads throughout the circuit, thereby avoiding interference from external power sources to subsequent circuitry.

Referring to fig. 3, in some embodiments of the present utility model, the AIR state detecting unit 3 includes an or gate U10, a low voltage plug P1, a resistor R58, a resistor R59, a resistor R60, a resistor R61, a resistor R62, a resistor R63, and a resistor R64. The pin VCC of the OR chip U10 is connected with a power supply VCC_5, the pin 3A of the OR chip U10 is connected with the pin 1 of the low-voltage plug P1, the pin 3B of the OR chip U10 is connected with the pin 2B of the OR chip U10 through a resistor R64 and a resistor R60 which are sequentially connected in series, the common ground of the resistor R64 and the resistor R60 is grounded, the pin 2B of the OR chip U10 is also connected with the pin 2 of the low-voltage plug P1 through a resistor R63, the pin 1A of the OR chip U10 is connected with the pin 1B of the OR chip U10 through a resistor R58 and a resistor R59 which are sequentially connected in series, the common ground of the resistor R58 and the resistor R59 is grounded, and the pin 1A of the OR chip U10 is also connected with the pin 4 of the low-voltage plug P1 through a resistor R61, and the pin 1B of the OR chip U10 is also connected with the pin 3 of the low-voltage plug P1 through a resistor R62. The type of the or gate chip U10 may be 74HC32, and the type of the low voltage plug P1 may be jae_mx34012NF1.

Referring to fig. 4, in some embodiments of the present utility model, the TSAL output unit 2 includes a relay K2, a relay K3, a transistor Q1, a transistor Q2, a connection terminal row J4, a diode D7, a diode D10, a light emitting diode D8, a light emitting diode D11, a resistor R33, a resistor R25, a resistor R27, a resistor R28, a resistor R30, a resistor R313, and a resistor R32. Terminals COM1 and COM2 of the relay K2 are connected to an external dc power supply vcc_24v after being connected, terminals NO1 and NO2 of the relay K2 are connected to a terminal 1 of the terminal block J4, the terminal 1 of the terminal block J4 is further grounded through a resistor R33, a terminal Coil1 of the relay K2 is connected to an anode of the diode D7, a terminal Coil2 of the relay K2 is connected to a cathode of the diode D7, a terminal Coil2 of the relay K2 is connected to a power supply vcc_5, a cathode of the diode D7 is connected to an anode of the light emitting diode D8 through a resistor R25, a cathode of the light emitting diode D8 is connected to an anode of the diode D7, an anode of the diode D7 is further connected to a collector of the triode Q1, a base of the triode Q1 is connected to an emitter of the triode Q1 through a resistor R28 and a resistor R27 which are sequentially connected in series, an emitter of the triode Q1 is grounded, and a common terminal of the resistor R28 and the resistor R27 is connected to a pin 3Y of the or gate chip U10. The wiring terminal row J4 is further used for being connected with a power supply end of the TSAL, the terminals COM1 and COM2 of the relay K3 are connected with the terminal 2 of the wiring terminal row J4, the terminals NO1 and NO2 of the relay K3 are connected with the terminal 3 of the wiring terminal row J4, the terminal Coil1 of the relay K3 is connected with the anode of the diode D10, the terminal Coil2 of the relay K3 is connected with the cathode of the diode D10, the terminal Coil2 of the relay K3 is connected with the power supply VCC_5, the cathode of the diode D10 is connected with the anode of the light emitting diode D11 through the resistor R30, the cathode of the light emitting diode D11 is connected with the anode of the diode D10, the anode of the diode D10 is also connected with the collector of the triode Q2, the base of the triode Q2 is connected with the emitter of the triode Q2 through the resistor R32 and the resistor R31 which are sequentially connected in series, the emitter of the resistor R32 and the common end of the resistor R31 are connected with the pin 7 of the low voltage plug P1.

Referring to fig. 5, in some embodiments of the present utility model, the TSAL security status unit 4 includes an and gate chip U6, an exclusive or gate chip U7, a resistor R11, a resistor R13, a resistor RH, and a resistor R2. One end of a resistor R11 is connected with the pin 5 of the low-voltage plug P1, the other end of the resistor R11 is grounded through a resistor R13, the common end of the resistor R11 and the resistor R13 is connected with the pin 2B of the AND gate chip U6, the pin 2A of the AND gate chip U6 is connected with the pin 1Y of the AND gate chip U7, the pin 2Y of the AND gate chip U6 is connected with the pin 7 of the low-voltage plug P1, the pin VCC of the AND gate chip U6 is connected with the power VCC_5, the pin 1A of the AND gate chip U7 is grounded through the resistor R2, the pin 1B of the AND gate chip U7 is connected with the pin 3B of the OR gate chip U10, and the pin 1Y of the AND gate chip U7 is connected with the power VCC_5 through a resistor RH.

In the above embodiment, the judgment principle is that when voltage ambiguity occurs or AIR is broken, the output of Relay2 is low, the Relay of TSAL output unit 2 is not on, the TSAL power supply line is disconnected, and the lamp is turned off.

Referring to fig. 6, in some embodiments of the present utility model, the voltage ambiguity unit 5 includes a photo coupler U4, a connection terminal row J1, a connection terminal row J3, a diode D12, a resistor R41, a resistor R42, a resistor R52, a resistor R53, a resistor R54, a resistor R55, a resistor R56, a resistor R57, a resistor R65, a resistor R66, a resistor R67, a resistor R68, and a resistor R69. Terminal 1 of terminal block J3 is connected with pin 2 of photo coupler U4 through resistor R52, resistor R53, resistor R54, resistor R55, resistor R56 and resistor R57 in series in this order, diode D12 is connected in parallel with resistor R57, terminal 2 of terminal block J3 is connected with terminal 1 of terminal block J1 through resistor R41, terminal 2 of terminal block J1 is connected with pin 1 of photo coupler U4 through resistor R42, resistor R69, resistor R68, resistor R67, resistor R66 and resistor R65 in series in this order, pin 4 of photo coupler U4 is connected with power vcc_5, pin 3 of photo coupler U4 is connected with pin 1A of exclusive or gate chip U7, and terminal 1 of terminal block J1 is also used for connecting with a measuring point.

In the above embodiment, when the voltage ambiguity unit 5 collects that the voltage at both ends of the controller is lower than the voltage at both ends of the battery box, a corresponding control signal is sent to the TSAL safety state unit 4 through the photo coupler U4, and then the TSAL is controlled to turn off the lamp. Illustratively, the photo coupler U4 may be of the type EL817.

Referring to fig. 7, in some embodiments of the present utility model, the voltage threshold setting unit 7 includes an op-amp chip U3, a photo coupler U5, a sliding resistor R22, a capacitor C4, a resistor R17, a resistor R18, a resistor R78, and a resistor R24. The terminal 1 of the photoelectric coupler U5 is connected with the pin 2OUT of the operational amplifier chip U3 through a resistor R24, the terminal 2 of the photoelectric coupler U5 is connected with the pin 2 IN-of the operational amplifier chip U3, the terminal 3 of the photoelectric coupler U5 is connected with the pin 3B of the OR gate chip U10, the terminal 4 of the photoelectric coupler U5 is connected with the power VCC_5, the pin 1OUT of the operational amplifier chip U3 is connected with the pin 1 IN-of the operational amplifier chip U3 through a resistor R17, the pin 1OUT of the operational amplifier chip U3 is also connected with the pin 2OUT of the operational amplifier chip U3, the pin 1IN+ of the operational amplifier chip U3 is connected with the pin GND of the operational amplifier chip U3 through a resistor R18 and a capacitor C4 which are sequentially connected IN series, the common end of the resistor R18 and the capacitor C4 is connected with the cathode of the diode D12, the pin 1 IN-of the operational amplifier chip U3 is connected with the pin GND of the operational amplifier chip U3 through a resistor R78, the VCC of the operational amplifier chip U3 is connected with the pin GND of the operational amplifier chip U3 through a sliding resistor R22, and the pin of the sliding arm of the operational amplifier chip U3 is connected with the pin GND 2+ of the operational amplifier chip.

In the above embodiment, by adjusting the resistance of the sliding resistor R22, the voltage threshold can be changed to meet the detection requirement of different voltage values.

Referring to fig. 8, in some embodiments of the present utility model, the isolated power unit 6 includes an isolated chip U1, an inductor L1, a light emitting diode D3, a capacitor C2, a capacitor C1 and a resistor R12. The pin +vo of the isolation chip U1 is connected with the pin VCC of the operational amplifier chip U3, the pin +vo of the isolation chip U1 is connected with the pin 0V of the isolation chip U1 through a capacitor C2, the pin +vo of the isolation chip U1 is connected with the anode of the light-emitting diode D3 through a resistor R12, the cathode of the light-emitting diode D3 is connected with the pin 0V of the isolation chip U1, the pin Vin of the isolation chip U1 is connected with the pin GND of the isolation chip U1 after sequentially connected with an inductor L1 and a capacitor C1 in series, the common end of the inductor L1 and the capacitor C1 is connected with a power supply VCC_5, and the pin 0V of the isolation chip U1 is also connected with a terminal 2 of the wiring terminal row J3.

In the above embodiment, by designing the isolated power supply unit 6 using the isolated chip U1, a clean and efficient power supply voltage can be supplied to the post-stage circuit comparator. The light emitting diode D3 is a power indicator lamp of the isolated power unit 6, and the resistor R12 is used for current limiting. Illustratively, the isolation chip U1 may be an op-amp isolation chip of model 0512 from 5V to 12V.

Referring to fig. 9, in some embodiments of the present utility model, the discharging circuit unit 8 includes a relay K1, a diode D6, a terminal block J5, a terminal block J6, a light emitting diode D9, and a resistor R26. The diode D6 is connected with the relay K1 in parallel, the anode of the diode D6 is grounded, the cathode of the diode D6 is connected with the pin 11 of the low-voltage plug P1, the cathode of the diode D6 is connected with the anode of the light-emitting diode D9 through the resistor R26, the cathode of the light-emitting diode D9 is grounded, the terminal 2 of the wiring terminal row J5 is connected with the terminal 1 of the wiring terminal row J6, the terminal 1 of the wiring terminal row J5 is connected with the common end of the resistor R69 and the resistor R42, the terminal 2 of the wiring terminal row J6 is connected with the terminal 2 of the wiring terminal row J3, and the terminal 2 of the wiring terminal row J6 is also connected with the pin GND of the operational amplifier chip U3.

In the above embodiment, when the safety circuit is closed, the coil of the relay K1 is energized, the discharge circuit unit 8 is opened, and when the safety circuit is opened, the coil of the relay K1 is de-energized, and the discharge circuit is closed to start discharging, so that the type of the relay K1 may be HVR24-1B, for example, to achieve reliable and efficient discharging operation of the capacitor in the high voltage circuit.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (9)

1. The utility model provides a trolley-bus discharges, actuating system state detection circuit, its characterized in that includes power supply unit and TSAL output unit, AIR state detection unit, TSAL safety state unit, voltage ambiguity unit, isolation power supply unit and voltage threshold setting unit that link to each other respectively, still include the return circuit unit that discharges, AIR state detection unit voltage ambiguity unit with voltage threshold setting unit still link to each other with the return circuit unit that discharges respectively, TSAL output unit still through link to each other in proper order AIR state detection unit AIR state detection unit TSAL safety state unit voltage ambiguity unit with after the isolation power supply unit with voltage threshold setting unit links to each other, voltage ambiguity unit still is used for linking to each other with outside measuring point, TSAL output unit still is used for linking to each other with the power supply end of TSAL.

2. The electric-car discharging, driving system state detection circuit according to claim 1, wherein the power supply unit includes a diode D2, a light emitting diode D4, a capacitor C3, a resistor R20, and a power supply chip U2;

the anode of the diode D2 is connected with an external direct current power supply VCC_24V, the cathode of the diode D2 is grounded through the capacitor C3, the cathode of the diode D2 is also connected with a pin VIN+ of the power chip U2, a pin VOUT+ of the power chip U2 is connected with the anode of the light emitting diode D4 through the resistor R20, a pin of the light emitting diode D4 is grounded, and a pin VOUT+ of the power chip U2 is used for outputting a power supply VCC_5.

3. The electric-car discharging, driving-system state detection circuit according to claim 2, wherein the AIR state detection unit includes an or gate chip U10, a low-voltage plug P1, a resistor R58, a resistor R59, a resistor R60, a resistor R61, a resistor R62, a resistor R63, and a resistor R64;

the pin VCC of the OR chip U10 is connected with the power VCC_5, the pin 3A of the OR chip U10 is connected with the pin 1 of the low-voltage plug P1, the pin 3B of the OR chip U10 is connected with the pin 2B of the OR chip U10 through the resistor R64 and the resistor R60 which are sequentially connected in series, the common ground of the resistor R64 and the resistor R60 is grounded, the pin 2B of the OR chip U10 is also connected with the pin 2 of the low-voltage plug P1 through the resistor R63, the pin 1A of the OR chip U10 is connected with the pin 1B of the OR chip U10 through the resistor R58 and the resistor R59 which are sequentially connected in series, the common ground of the resistor R58 and the resistor R59 is grounded, the pin 1A of the OR chip U10 is also connected with the pin 4 of the low-voltage plug P1 through the resistor R61, and the pin 1B of the OR chip U10 is also connected with the pin 3 of the low-voltage plug P1 through the resistor R62.

4. A trolley discharge, drive system state detection circuit according to claim 3, wherein the TSAL output unit comprises a relay K2, a relay K3, a transistor Q1, a transistor Q2, a terminal block J4, a diode D7, a diode D10, a light emitting diode D8, a light emitting diode D11, a resistor R33, a resistor R25, a resistor R27, a resistor R28, a resistor R30, a resistor R313, and a resistor R32;

terminals COM1 and COM2 of the relay K2 are connected to an external dc power supply vcc_24v, terminals NO1 and NO2 of the relay K2 are connected to a terminal 1 of the connection terminal row J4, a terminal 1 of the connection terminal row J4 is further grounded through the resistor R33, a terminal Coil1 of the relay K2 is connected to an anode of the diode D7, a terminal Coil2 of the relay K2 is connected to a cathode of the diode D7, a terminal Coil2 of the relay K2 is connected to the power supply vcc_5, a cathode of the diode D7 is connected to an anode of the light emitting diode D8 through the resistor R25, a cathode of the light emitting diode D8 is connected to an anode of the diode D7, an anode of the diode D7 is further connected to a collector of the transistor Q1, a base of the transistor Q1 is sequentially connected to a cathode of the diode D7 through the resistor R28 and the resistor R27, and a base of the transistor Q1 is further connected to a common terminal pin of the resistor R10 and the emitter of the transistor Q1 is further connected to a common terminal pin of the resistor R10;

the terminal COM1 and the terminal COM2 of the relay K3 are connected with the terminal 2 of the wiring terminal row J4, the terminal NO1 and the terminal NO2 of the relay K3 are connected with the terminal 3 of the wiring terminal row J4, the terminal Coil1 of the relay K3 is connected with the anode of the diode D10, the terminal Coil2 of the relay K3 is connected with the cathode of the diode D10, the terminal Coil2 of the relay K3 is connected with the power supply VCC_5, the cathode of the diode D10 is connected with the anode of the light emitting diode D11 through the resistor R30, the cathode of the light emitting diode D11 is connected with the anode of the diode D10, the anode of the diode D10 is also connected with the collector of the triode Q2, the base of the triode Q2 is connected with the emitter of the triode Q2 through the resistor R32 and the resistor R31 which are sequentially connected in series, and the cathode of the triode Q2 is connected with the common pin P1 and the low voltage pin P32.

5. The electric vehicle discharging and driving system state detection circuit according to claim 4, wherein the TSAL safety state unit comprises an and gate chip U6, an exclusive or gate chip U7, a resistor R11, a resistor R13, a resistor RH and a resistor R2;

one end of the resistor R11 is connected with the pin 5 of the low-voltage plug P1, the other end of the resistor R11 is grounded through the resistor R13, the public end of the resistor R11 and the resistor R13 is connected with the pin 2B of the AND gate chip U6, the pin 2A of the AND gate chip U6 is connected with the pin 1Y of the AND gate chip U7, the pin 2Y of the AND gate chip U6 is connected with the pin 7 of the low-voltage plug P1, the pin VCC of the AND gate chip U6 is connected with the power supply VCC_5, the pin 1A of the AND gate chip U7 is grounded through the resistor R2, the pin 1B of the AND gate chip U7 is connected with the pin 3B of the OR gate chip U10, and the pin 1Y of the AND gate chip U7 is connected with the power supply VCC_5 through the resistor RH.

6. The electric-car discharging, driving-system state detection circuit according to claim 5, wherein the voltage ambiguity unit includes a photo coupler U4, a terminal block J1, a terminal block J3, a diode D12, a resistor R41, a resistor R42, a resistor R52, a resistor R53, a resistor R54, a resistor R55, a resistor R56, a resistor R57, a resistor R65, a resistor R66, a resistor R67, a resistor R68, and a resistor R69;

the terminal 1 of the wiring terminal row J3 is connected with the pin 2 of the photoelectric coupler U4 after passing through the resistor R52, the resistor R53, the resistor R54, the resistor R55, the resistor R56 and the resistor R57 which are sequentially connected in series, the diode D12 and the resistor R57 are connected in parallel, the terminal 2 of the wiring terminal row J3 is connected with the terminal 1 of the wiring terminal row J1 through the resistor R41, the terminal 2 of the wiring terminal row J1 is connected with the pin 1 of the photoelectric coupler U4 after passing through the resistor R42, the resistor R69, the resistor R68, the resistor R67, the resistor R66 and the resistor R65 which are sequentially connected in series, the pin 4 of the photoelectric coupler U4 is connected with the power supply_5, the pin 3 of the photoelectric coupler U4 is connected with the pin 1A of the exclusive OR gate chip U7, and the terminal 1 of the wiring terminal row J1 is also used for connecting with the measurement point VCC.

7. The electric-car discharging and driving system state detection circuit according to claim 6, wherein the voltage threshold setting unit comprises an operational amplifier chip U3, a photo coupler U5, a sliding resistor R22, a capacitor C4, a resistor R17, a resistor R18, a resistor R78 and a resistor R24;

the terminal 1 of the photoelectric coupler U5 is connected with the pin 2OUT of the operational amplifier chip U3 through the resistor R24, the terminal 2 of the photoelectric coupler U5 is connected with the pin 2 IN-of the operational amplifier chip U3, the terminal 3 of the photoelectric coupler U5 is connected with the pin 3B of the OR gate chip U10, the terminal 4 of the photoelectric coupler U5 is connected with the power VCC_5, the pin 1OUT of the operational amplifier chip U3 is connected with the pin 1 IN-of the operational amplifier chip U3 through the resistor R17, the pin 1OUT of the operational amplifier chip U3 is also connected with the pin 2OUT of the operational amplifier chip U3, the pin 1IN+ of the operational amplifier chip U3 is connected with the pin GND of the operational amplifier chip U3 through the resistor R18 and the capacitor C4 which are sequentially connected IN series, the common end of the resistor R18 and the capacitor C4 is connected with the power VCC_5, the pin 1OUT of the operational amplifier chip U3 is connected with the pin 2 through the resistor R78, and the pin 3 is connected with the pin GND 2 through the resistor R22.

8. The electric-car discharging and driving system state detection circuit according to claim 7, wherein the isolated power supply unit comprises an isolated chip U1, an inductor L1, a light emitting diode D3, a capacitor C2, a capacitor C1 and a resistor R12;

the pin +vo of the isolation chip U1 is connected with the pin VCC of the operational amplifier chip U3, the pin +vo of the isolation chip U1 is connected with the pin 0V of the isolation chip U1 through the capacitor C2, the pin +vo of the isolation chip U1 is connected with the anode of the light emitting diode D3 through the resistor R12, the cathode of the light emitting diode D3 is connected with the pin 0V of the isolation chip U1, the pin Vin of the isolation chip U1 is connected with the pin GND of the isolation chip U1 after passing through the inductor L1 and the capacitor C1 which are sequentially connected in series, the common end of the inductor L1 and the capacitor C1 is connected with the power supply VCC_5, and the pin 0V of the isolation chip U1 is also connected with the terminal 2 of the wiring terminal row J3.

9. The electric-car discharging and driving system state detection circuit according to claim 8, wherein the discharging circuit unit includes a relay K1, a diode D6, a terminal block J5, a terminal block J6, a light emitting diode D9, and a resistor R26;

the diode D6 is connected with the relay K1 in parallel, the anode of the diode D6 is grounded, the cathode of the diode D6 is connected with the pin 11 of the low-voltage plug P1, the cathode of the diode D6 is connected with the anode of the light-emitting diode D9 through the resistor R26, the cathode of the light-emitting diode D9 is grounded, the terminal 2 of the wiring terminal row J5 is connected with the terminal 1 of the wiring terminal row J6, the terminal 1 of the wiring terminal row J5 is connected with the resistor R69 and the common end of the resistor R42, the terminal 2 of the wiring terminal row J6 is connected with the terminal 2 of the wiring terminal row J3, and the terminal 2 of the wiring terminal row J6 is also connected with the pin GND of the operational amplifier chip U3.