CN213768271U - Electric automobile discharge circuit and electric automobile - Google Patents
Electric automobile discharge circuit and electric automobile Download PDFInfo
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- CN213768271U CN213768271U CN202021492711.2U CN202021492711U CN213768271U CN 213768271 U CN213768271 U CN 213768271U CN 202021492711 U CN202021492711 U CN 202021492711U CN 213768271 U CN213768271 U CN 213768271U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The application provides electric automobile lets out electric circuit and electric automobile, includes: the first discharging circuit is connected with the target discharging capacitor in parallel, the second discharging circuit is connected with the target discharging capacitor in parallel, and the temperature control circuit controls the first discharging circuit and the second discharging circuit to be switched on and off; the temperature control circuit is used for judging whether the battery temperature and the motor temperature of the electric automobile are higher than preset temperatures or not, if yes, the second electricity discharging circuit is controlled to discharge electricity to the target electricity discharging capacitor, and if not, the first electricity discharging circuit is controlled to discharge electricity to the target electricity discharging capacitor. The application sets up two bleeder circuits that are parallelly connected with target bleeder capacitance. The first electricity leakage circuit consumes the electric quantity of the target capacitor through the heating resistor, and the second electricity leakage circuit consumes the electric quantity of the target capacitor through the preset electricity leakage capacitor, so that the risk that the heater, the battery and the motor are overheated when the electricity leakage capacitor discharges electricity can be effectively avoided.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to an electric automobile lets out electric circuit and electric automobile.
Background
In an electric automobile, direct current output by a power battery is transmitted to a heater of the whole automobile after being filtered by a capacitor or is converted into alternating current to be supplied to a motor through an Insulated Gate Bipolar Transistor (IGBT) so as to drive the whole automobile to run. When the vehicle is shut down, the amount of charge stored in these capacitors needs to be unloaded for safety reasons. Typically after shutdown, this power is delivered to the heater or motor and allowed to run for an additional period of time until power consumption is complete. However, when the whole vehicle is stopped after running for a long time or is suddenly stopped, the temperature of the battery is high, and then the power is discharged in a manner of heating the heater and supplying power to the motor, so that a certain overheating risk exists for the heater, the battery and the motor.
Therefore, there is a need for a discharge circuit that does not pose an overheating risk to the heater and motor.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an electric automobile lets out electric circuit and electric automobile.
The application provides electric automobile discharge circuit, its characterized in that: the method comprises the following steps: the first discharging circuit is connected with the target discharging capacitor in parallel, the second discharging circuit is connected with the target discharging capacitor in parallel, and the temperature control circuit controls the first discharging circuit and the second discharging circuit to be switched on and off;
the temperature control circuit is used for judging whether the battery temperature and the motor temperature of the electric automobile are higher than preset temperatures or not, if so, the second discharging circuit is controlled to discharge electricity to the target discharging capacitor, and if not, the first discharging circuit is controlled to discharge electricity to the target discharging capacitor;
the temperature control circuit comprises a resistor R3, a resistor R4, a positive temperature coefficient thermistor PTC1 and a comparator U1;
one end of the resistor R4 is connected with a power supply, the other end of the resistor R4 is grounded through the positive temperature coefficient thermistor PTC1, the inverting end of the comparator U1 is connected with the common connection point of the resistor R4 and the positive temperature coefficient thermistor PTC1, the non-inverting end of the comparator U1 is connected with a reference voltage REF1, the output end of the comparator U1 is connected with one end of the resistor R3, and the other end of the resistor R3 is the output end of the temperature control circuit.
Further, the first discharging circuit comprises a triode Q1 and a resistor R5, a collector of the triode Q1 is connected with an anode of the target discharging capacitor, an emitter of the triode Q1 is connected with one end of the resistor R5, and the other end of the resistor R5 is connected with a cathode of the target discharging capacitor, wherein the triode Q1 is an NPN-type triode.
Further, the second discharging circuit comprises a triode Q2 and a resistor R2, an emitter of the triode Q2 is connected with a positive electrode of the target discharging capacitor, a collector of the triode Q2 is connected with an end of the resistor R2, and the other end of the resistor R2 is connected with a negative electrode of the target discharging capacitor, wherein the triode Q1 is a PNP-type triode.
Further, the second discharging circuit further comprises a signal indicator light LED1, the anode of the signal indicator light LED1 is connected with the common connection point of the resistor R2 and the cathode of the target discharging capacitor, and the cathode of the signal indicator light LED1 is connected with the cathode of the target discharging capacitor.
Furthermore, the second discharging circuit further comprises an inductor L1, one end of the inductor L1 is connected with the positive electrode of the target discharging capacitor, and the other end of the inductor L1 is connected with the emitter of the triode Q2.
Further, the target discharging capacitor is a polar capacitor.
The application also provides an electric automobile, its characterized in that: the power leakage circuit comprises a power leakage circuit of the electric automobile.
The utility model has the advantages of: the application sets up two bleeder circuits that are parallelly connected with target bleeder capacitance. The first electricity leakage circuit consumes the electric quantity of the target capacitor through the heating resistor, and the second electricity leakage circuit consumes the electric quantity of the target capacitor through the preset electricity leakage capacitor, so that the risk that the heater, the battery and the motor are overheated when the electricity leakage capacitor discharges electricity can be effectively avoided.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The invention is further explained by the following combined with the attached drawings of the specification:
the utility model provides an electric automobile discharge circuit, its characterized in that: the method comprises the following steps: the first discharging circuit is connected with the target discharging capacitor in parallel, the second discharging circuit is connected with the target discharging capacitor in parallel, and the temperature control circuit controls the first discharging circuit and the second discharging circuit to be switched on and off;
the temperature control circuit is used for judging whether the battery temperature and the motor temperature of the electric automobile are higher than preset temperatures or not, if so, the second discharging circuit is controlled to discharge electricity to the target discharging capacitor, and if not, the first discharging circuit is controlled to discharge electricity to the target discharging capacitor;
the temperature control circuit comprises a resistor R3, a resistor R4, a positive temperature coefficient thermistor PTC1 and a comparator U1;
one end of the resistor R4 is connected with a power supply, the other end of the resistor R4 is grounded through the positive temperature coefficient thermistor PTC1, the inverting end of the comparator U1 is connected with the common connection point of the resistor R4 and the positive temperature coefficient thermistor PTC1, the non-inverting end of the comparator U1 is connected with a reference voltage REF1, the output end of the comparator U1 is connected with one end of the resistor R3, and the other end of the resistor R3 is the output end of the temperature control circuit. The positive temperature coefficient thermistor is arranged near the power battery and the motor of the electric automobile and used for detecting the real-time temperature of the power battery and the motor of the electric automobile and converting the real-time temperature into voltage to be transmitted to the comparator.
By the technical scheme, when the battery temperature and the motor temperature of the electric automobile are not higher than the preset temperatures, electricity is discharged through the first electricity discharging circuit, otherwise, electricity is discharged through the second electricity discharging circuit; the cooperation through first leakage circuit and second leakage circuit is used, consumes the electric quantity that carries on the target leakage electric capacity, and the overheated risk takes place for heater, battery and motor when can effectively avoid leaking electric capacity and let out the electricity.
In this embodiment, as shown in fig. 1, the first discharging circuit includes a transistor Q1 and a resistor R5, a collector of the transistor Q1 is connected to an anode of the target discharging capacitor, an emitter of the transistor Q1 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to a cathode of the target discharging capacitor, wherein the transistor Q1 is an NPN transistor. The resistor R5 is a heating resistor of a heater of an electric vehicle.
In this embodiment, the second discharging circuit includes a transistor Q2 and a resistor R2, an emitter of the transistor Q2 is connected to a positive electrode of the target discharging capacitor, a collector of the transistor Q2 is connected to an end of the resistor R2, and the other end of the resistor R2 is connected to a negative electrode of the target discharging capacitor, wherein the transistor Q1 is a PNP transistor.
The working principle is as follows:
when the battery temperature and the motor temperature of the electric automobile are not higher than the preset temperature, the voltage of the positive temperature coefficient thermistor is not higher than a preset reference voltage REF1, at the moment, the voltage of the inverting end of the comparator U1 is not higher than the voltage of the non-inverting end, the comparator U1 outputs a high level, the triode Q1 is switched on, the target discharging capacitor is discharged through the first discharging circuit, the triode Q2 is cut off, and the second discharging circuit is in a disconnected state;
when the battery temperature and the motor temperature of the electric automobile are higher than the preset temperatures, the voltage of the positive temperature coefficient thermistor is higher than a preset reference voltage REF1, at the moment, the voltage of the inverting end of the comparator U1 is higher than the voltage of the non-inverting end, the comparator U1 outputs a low level, the triode Q2 is switched on, the target discharging capacitor is discharged through the second discharging circuit, the triode Q1 is cut off, and the first discharging circuit is in a disconnected state;
when the battery temperature and the motor temperature of the electric automobile are not higher than the preset temperature, the electricity is discharged through the first electricity discharging circuit, and otherwise, the electricity is discharged through the second electricity discharging circuit.
In this embodiment, the second discharging circuit further includes a signal indicator LED1, an anode of the signal indicator LED1 is connected to a common connection point of the resistor R2 and a negative electrode of the target discharging capacitor, and a cathode of the signal indicator LED1 is connected to the negative electrode of the target discharging capacitor. The indicator light LED1 lights when discharging, and lights out after discharging, so as to realize the information transmission in the discharging process.
In this embodiment, the second discharging circuit further includes an inductor L1, one end of the inductor L1 is connected to the positive electrode of the target discharging capacitor, and the other end of the inductor L1 is connected to the emitter of the transistor Q2. When the pressure borne by the target capacitor C1 is too large, the inductor L1 can effectively prevent the conduction of the transistor Q2, and protect the safety of the components of the second discharging circuit.
In this embodiment, as shown in fig. 1, the target leakage capacitance is a polar capacitance.
Correspondingly, this application still provides an electric automobile, its characterized in that: the power leakage circuit comprises a power leakage circuit of the electric automobile.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (7)
1. The utility model provides an electric automobile discharge circuit which characterized in that: the method comprises the following steps: the first discharging circuit is connected with the target discharging capacitor in parallel, the second discharging circuit is connected with the target discharging capacitor in parallel, and the temperature control circuit controls the first discharging circuit and the second discharging circuit to be switched on and off;
the temperature control circuit is used for judging whether the battery temperature and the motor temperature of the electric automobile are higher than preset temperatures or not, if so, the second discharging circuit is controlled to discharge electricity to the target discharging capacitor, and if not, the first discharging circuit is controlled to discharge electricity to the target discharging capacitor;
the temperature control circuit comprises a resistor R3, a resistor R4, a positive temperature coefficient thermistor PTC1 and a comparator U1;
one end of the resistor R4 is connected with a power supply, the other end of the resistor R4 is grounded through the positive temperature coefficient thermistor PTC1, the inverting end of the comparator U1 is connected with the common connection point of the resistor R4 and the positive temperature coefficient thermistor PTC1, the non-inverting end of the comparator U1 is connected with a reference voltage REF1, the output end of the comparator U1 is connected with one end of the resistor R3, and the other end of the resistor R3 is the output end of the temperature control circuit.
2. The electric vehicle discharging circuit according to claim 1, wherein: the first discharging circuit comprises a triode Q1 and a resistor R5, a collector of the triode Q1 is connected with the anode of the target discharging capacitor, an emitter of the triode Q1 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the cathode of the target discharging capacitor, and the NPN type triode Q1 is connected with the NPN type triode Q1.
3. The electric vehicle discharging circuit according to claim 1, wherein: the second discharging circuit comprises a triode Q2 and a resistor R2, an emitting electrode of the triode Q2 is connected with the positive electrode of the target discharging capacitor, a collecting electrode of the triode Q2 is connected with the end of the resistor R2, the other end of the resistor R2 is connected with the negative electrode of the target discharging capacitor, and the PNP triode of the triode Q1 is adopted.
4. The electric vehicle discharging circuit according to claim 3, wherein: the second discharging circuit further comprises a signal indicator light LED1, the anode of the signal indicator light LED1 is connected with the common connection point of the resistor R2 and the cathode of the target discharging capacitor, and the cathode of the signal indicator light LED1 is connected with the cathode of the target discharging capacitor.
5. The electric vehicle discharging circuit according to claim 3, wherein: the second discharging circuit further comprises an inductor L1, one end of the inductor L1 is connected with the anode of the target discharging capacitor, and the other end of the inductor L1 is connected with the emitter of the triode Q2.
6. The electric vehicle discharging circuit according to claim 1, wherein: the target discharging capacitor is a polar capacitor.
7. An electric vehicle, characterized in that: comprising a bleeder circuit for an electric vehicle according to any of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021492711.2U CN213768271U (en) | 2020-07-24 | 2020-07-24 | Electric automobile discharge circuit and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021492711.2U CN213768271U (en) | 2020-07-24 | 2020-07-24 | Electric automobile discharge circuit and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213768271U true CN213768271U (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021492711.2U Active CN213768271U (en) | 2020-07-24 | 2020-07-24 | Electric automobile discharge circuit and electric automobile |
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| Country | Link |
|---|---|
| CN (1) | CN213768271U (en) |
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2020
- 2020-07-24 CN CN202021492711.2U patent/CN213768271U/en active Active
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