CN218678520U - Slow charging wake-up circuit and charging circuit for electric automobile - Google Patents
Slow charging wake-up circuit and charging circuit for electric automobile Download PDFInfo
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- CN218678520U CN218678520U CN202222916942.7U CN202222916942U CN218678520U CN 218678520 U CN218678520 U CN 218678520U CN 202222916942 U CN202222916942 U CN 202222916942U CN 218678520 U CN218678520 U CN 218678520U
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an electric automobile fills wake-up circuit and charging circuit slowly, include: a rectifying circuit and a switching circuit connected to each other; one end of the rectifying circuit is used as a vehicle slow charging interface and is electrically connected with the charging interface; the other end of the rectifying circuit is connected with one end of the switching circuit; the other end of the switch circuit is connected with the battery; the switch circuit is also connected with a power management chip of the battery management system.
Description
Technical Field
The utility model relates to a new energy automobile technical field that charges especially relates to electric automobile fills wake-up circuit and charging circuit slowly.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The electric automobile is charged by a vehicle-mounted charger slowly, and when the automobile is charged slowly, the battery management system is in a dormant state because the ignition signal of the whole automobile is turned off. When the vehicle needs to be slowly charged, an external signal is needed to wake up the battery management system, and the battery management system controls the whole slow charging process. A wake-up circuit of an existing battery management system during slow charging is built by adopting a PNP type triode, when a gun is slowly charged and inserted, the voltage of a CC port of the battery management system is reduced through a CC resistor inside the slow charging gun, and the triode is conducted. Therefore, the internal power chip of the battery management system is awakened, and the battery management system is electrified to operate and control the whole charging process. This kind of awakening mode fills slowly, if fill electric pile power failure back, if do not insert and pull out the rifle, battery management system can't be awaken up again, causes unable charging.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a slow charging wake-up circuit and a charging circuit for an electric automobile;
the first aspect provides an electric vehicle slow-charging wake-up circuit;
electric automobile awakens circuit slowly to fill includes: a rectifying circuit and a switching circuit connected to each other;
one end of the rectifying circuit is used as a vehicle slow charging interface and is electrically connected with the charging interface;
the other end of the rectifying circuit is connected with one end of the switching circuit;
the other end of the switch circuit is connected with the battery;
the switch circuit is also connected with a power management chip of the battery management system.
A second aspect provides a charging circuit;
a charging circuit, comprising:
the slow charging wake-up circuit comprises a charging gun and the slow charging wake-up circuit of the electric vehicle;
and the output end of the charging gun is used for being connected with a rectifying circuit of the slow charging wake-up circuit of the electric automobile.
Compared with the prior art, the beneficial effects of the utility model are that:
after charging pile has a power failure, the battery management system does not need to be awakened again by plugging and unplugging the charging gun.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic diagram of a CP signal wake-up circuit according to an embodiment of the present disclosure;
wherein D1, D2, D3 and D4 represent rectifier diodes; q1 represents an N-type MOS tube; q2 represents a P-type MOS tube; r1, R2, R5 and R6 represent voltage dividing resistors; r3 and R4 represent current limiting resistors; c1 represents a filter capacitance.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.
All data are obtained according to the embodiment and are legally applied on the data on the basis of compliance with laws and regulations and user consent.
Example one
The embodiment provides a slow charging wake-up circuit of an electric vehicle;
as shown in fig. 1, the slow-charging wake-up circuit for an electric vehicle includes: a rectifying circuit and a switching circuit connected to each other;
one end of the rectifying circuit is used as a vehicle slow charging interface and is electrically connected with the charging interface;
the other end of the rectifying circuit is connected with one end of the switching circuit;
the other end of the switch circuit is connected with the battery;
the switch circuit is also connected with a power management chip of the battery management system.
Further, the rectifying circuit comprises a diode D1, a diode D2, a diode D3 and a diode D4;
the anode of the diode D1 is grounded, and the cathode of the diode D1 is connected with the anode of the diode D2;
the anode of the diode D4 is grounded, and the cathode of the diode D4 is connected with the anode of the diode D3;
the cathode of the diode D2 is connected with the cathode of the diode D3;
the cathode of the diode D1 and the cathode of the diode D4 are connected to the pin of the vehicle slow charging port CP.
When the vehicle is slowly charged, the slow charging gun is inserted into the vehicle slow charging port, and a CP signal on the slow charging gun is connected to the negative electrodes of the diodes D1 and D4 through a CP pin of the vehicle slow charging port.
Further, the switching circuit includes:
the device comprises a voltage division resistor R1, a voltage division resistor R2, a current limiting resistor R3, a current limiting resistor R4, a voltage division resistor R5, a voltage division resistor R6, a filter capacitor C1, an N-type MOS transistor Q1 and a P-type MOS transistor Q2.
Further, a first end of the voltage dividing resistor R1 is connected to a negative electrode of the diode D2, and a second end of the voltage dividing resistor R1 is connected to a first end of the voltage dividing resistor R2; the second end of the divider resistor R2 is grounded;
the second end of the divider resistor R1 is connected with the grid electrode of the N-type MOS tube Q1, the source electrode of the N-type MOS tube Q1 is grounded, the drain electrode of the N-type MOS tube Q1 is connected with the first end of the current limiting resistor R3, the second end of the current limiting resistor R3 is connected with the first end of the current limiting resistor R4, the second end of the current limiting resistor R4 is connected with the positive electrode of the vehicle-mounted lead-acid battery B1, and the negative electrode of the vehicle-mounted lead-acid battery B1 is grounded;
the second end of the current-limiting resistor R3 is connected with the grid electrode of the P-type MOS tube Q2; the source electrode of the P-type MOS tube Q2 is connected with the second end of the current-limiting resistor R4; the drain electrode of the P-type MOS tube Q2 is connected with the first end of the divider resistor R5, the second end of the divider resistor R5 is connected with the first end of the divider resistor R6, and the second end of the divider resistor R6 is grounded; the second end of the divider resistor R5 is connected with the first end of the filter capacitor C1, and the second end of the filter capacitor C1 is grounded; the second end of the divider resistor R5 is connected with a power management chip of the battery management system.
The power management chip adopts MC33FS4503CAE.
When the slow charging gun is inserted into the slow charging port of the vehicle, the CP signal port on the slow charging gun outputs a CP signal. The CP signal is a rectangular wave signal with the frequency of 1KHz and the amplitude of +/-12V, and is input into the battery management system slow charging CP signal awakening circuit through the vehicle slow charging port.
The CP signal rectifies the rectangular wave signal into a 12V direct current signal through the rectifying circuit, the 12V direct current signal forms a voltage U1 after being subjected to voltage division through the voltage dividing resistor R1 and the voltage dividing resistor R2, the voltage U1 is larger than a cut-off voltage Ube1 of the N-type MOS tube Q1, and the N-type MOS tube Q1 is conducted to the ground.
After Q1 is conducted, a voltage division circuit is formed between the vehicle-mounted lead-acid battery B1 and the ground through the current limiting resistor R3 and the current limiting resistor R4.
The voltage between the first end and the second end of the current-limiting resistor R4 is U2, the voltage | U2| > | Ube2|, the P-type MOS tube Q2 is conducted, the voltage Ub of the vehicle-mounted lead-acid battery B1 is filtered by the filter capacitor C1 after being divided by the divider resistor R5 and the divider resistor R6, and the power chip is awakened after being filtered, so that the battery management system is electrified to operate and controls the whole charging process.
When the slow charging is finished, the slow charging gun is pulled out, and the CP signal port output on the slow charging gun is 0V.
When the CP signal is 0V, a voltage U1=0V is formed after voltage division is performed by the voltage dividing resistor R1 and the voltage dividing resistor R2, and U1 is smaller than a cutoff voltage Ube1 of the N-type MOS transistor Q1, and Q1 is cut off. After Q1 is cut off, a voltage division circuit cannot be formed among the vehicle-mounted lead-acid battery B1, the current limiting resistor R3, the current limiting resistor R4 and the ground. The voltage between the first end and the second end of the current limiting resistor R4 is U2, U2 is 0V, U2< | Ube2|, Q2 is cut off, the voltage between the voltage dividing resistor R5 and the voltage dividing resistor R6 is 0V, the power supply chip is closed, the battery management system is in a dormant state, and the charging process is ended.
Example two
A charging circuit, comprising:
the slow charging wake-up circuit comprises a charging gun and the slow charging wake-up circuit of the electric vehicle in the embodiment I;
and the output end of the charging gun is used for being connected with a rectifying circuit of the slow charging wake-up circuit of the electric automobile.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. Electric automobile awakens circuit slowly fills, characterized by includes: a rectifying circuit and a switching circuit connected to each other;
one end of the rectifying circuit is used as a vehicle slow charging interface and is electrically connected with the charging interface;
the other end of the rectifying circuit is connected with one end of the switching circuit;
the other end of the switch circuit is connected with the battery;
the switch circuit is also connected with a power management chip of the battery management system.
2. The slow-charge wake-up circuit for the electric vehicle as claimed in claim 1, wherein the rectifying circuit comprises a diode D1, a diode D2, a diode D3 and a diode D4.
3. The slow charge wake-up circuit for the electric vehicle as claimed in claim 2, wherein the anode of the diode D1 is grounded, and the cathode of the diode D1 is connected with the anode of the diode D2;
the anode of the diode D4 is grounded, and the cathode of the diode D4 is connected with the anode of the diode D3;
the cathode of the diode D2 is connected with the cathode of the diode D3;
and the cathode of the diode D1 and the cathode of the diode D4 are used as a vehicle slow charging port and are connected with a slow charging gun.
4. The slow-charging wake-up circuit for the electric vehicle as claimed in claim 1, wherein the switching circuit comprises:
divider resistor R1, divider resistor R2, current limiting resistor R3, current limiting resistor R4, divider resistor R5, divider resistor R6, filter capacitor C1, N type MOS pipe Q1 and P type MOS pipe Q2.
5. The slow-charge wake-up circuit of the electric vehicle as claimed in claim 4, wherein a first end of the voltage-dividing resistor R1 is connected to a negative electrode of the diode D2, and a second end of the voltage-dividing resistor R1 is connected to a first end of the voltage-dividing resistor R2; the second end of the divider resistor R2 is grounded.
6. The slow charge wake-up circuit of the electric vehicle as claimed in claim 4, wherein the second end of the voltage dividing resistor R1 is connected to the gate of the N-type MOS transistor Q1, the source of the N-type MOS transistor Q1 is grounded, the source of the N-type MOS transistor Q1 is connected to the first end of the current limiting resistor R3, the second end of the current limiting resistor R3 is connected to the first end of the current limiting resistor R4, the second end of the current limiting resistor R4 is connected to the positive electrode of the on-vehicle lead-acid battery B1, and the negative electrode of the on-vehicle lead-acid battery B1 is grounded.
7. The slow charge wake-up circuit for the electric vehicle as claimed in claim 4, wherein a second end of the current limiting resistor R3 is connected to a gate of a P-type MOS transistor Q2; the drain electrode of the P-type MOS tube Q2 is connected with the second end of the current-limiting resistor R4; the source electrode of the P-type triode Q2 is connected with the first end of the divider resistor R5, the second end of the divider resistor R5 is connected with the first end of the divider resistor R6, and the second end of the divider resistor R6 is grounded; the second end of the divider resistor R5 is connected with the first end of the filter capacitor C1, and the second end of the filter capacitor C1 is grounded; the second end of the divider resistor R5 is connected with a power management chip of the battery management system.
8. A charging circuit, comprising:
a charging gun and the electric vehicle slow-charging wake-up circuit of any one of claims 1 to 7;
and the output end of the charging gun is used for being connected with a rectifying circuit of the slow charging wake-up circuit of the electric automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222916942.7U CN218678520U (en) | 2022-11-02 | 2022-11-02 | Slow charging wake-up circuit and charging circuit for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222916942.7U CN218678520U (en) | 2022-11-02 | 2022-11-02 | Slow charging wake-up circuit and charging circuit for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218678520U true CN218678520U (en) | 2023-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222916942.7U Active CN218678520U (en) | 2022-11-02 | 2022-11-02 | Slow charging wake-up circuit and charging circuit for electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218678520U (en) |
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2022
- 2022-11-02 CN CN202222916942.7U patent/CN218678520U/en active Active
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