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CN-116945922-B - CC2 single wake-up circuit and wake-up method of BMS and electric automobile

CN116945922BCN 116945922 BCN116945922 BCN 116945922BCN-116945922-B

Abstract

The invention belongs to the technical field of new energy, and provides a CC2 single-time awakening circuit, an awakening method and an electric automobile of a BMS, which solve the technical problem that the traditional standard uses an A+ signal to awaken the BMS and cannot meet the awakening requirement; the charging gun switch is connected with the wake-up circuit, when the charging gun switch is turned off, the output voltage of the enabling pin of the DCDC is 0V, the BMS is dormant, when the charging gun switch is turned on, the delay capacitor is discharged, the PMOS tube is conducted, the output voltage of the enabling pin of the DCDC is increased from 0V to a direct current power supply voltage value, the BMS is waken, the capacitor is charged, the voltage of one side of the capacitor, which is close to the PMOS tube, is increased to the direct current power supply voltage value, the gate voltage and the source voltage of the PMOS tube are equal, the PMOS tube is turned off, and the output voltage of the enabling pin of the DCDC is changed into 0V.

Inventors

  • QIN QI
  • YUAN ZHONG
  • WANG HENG
  • ZHOU JIEXING
  • WANG QIANG

Assignees

  • 奇瑞新能源汽车股份有限公司

Dates

Publication Date
20260505
Application Date
20230811

Claims (5)

  1. 1. The CC2 single wake-up circuit based on the BMS is characterized by comprising a PMOS tube, a delay capacitor and a plurality of resistors; the gate electrode of the PMOS tube is connected with a direct current power supply through a delay capacitor, the source electrode of the PMOS tube is connected with the direct current power supply, and the drain electrode of the PMOS tube is connected to the BMS through a DCDC enabling pin; the charging gun switch is connected with the wake-up circuit through the charging gun switch; When the charging gun switch is turned off, the output voltage of the enabling pin of the DCDC is 0V, and the BMS sleeps; When the charging gun switch is switched on, the delay capacitor discharges, the PMOS tube is conducted, the output voltage of the enabling pin of DCDC is increased from 0V to the DC power supply voltage value, the BMS is awakened, the capacitor charges, the voltage of one side of the capacitor, which is close to the PMOS tube, is increased to the DC power supply voltage value, the gate voltage and the source voltage of the PMOS are equal, the PMOS tube is cut off, and the output voltage of the enabling pin of DCDC is changed into 0V; the gate electrode of the PMOS tube is connected with a direct current power supply after being sequentially connected in series through a second resistor, a delay capacitor and a first resistor; the cooperation of PMOS pipe and rifle switch that charges, turn on and cut off through the PMOS pipe, can realize the single awakening of CC2, even fill the rifle always online soon, also can not awaken BMS always, reduced the consumption.
  2. 2. The BMS-based CC2 single wake-up circuit of claim 1, further comprising a fourth resistor and a fifth resistor, wherein one end of the fourth resistor is connected to the gate of the PMOS transistor, the other end of the fourth resistor is connected to the dc power supply, and one end of the fifth resistor is connected to the drain of the PMOS transistor, and the other end of the fifth resistor is grounded.
  3. 3. The BMS-based CC2 single wake-up circuit of claim 1, wherein the voltage value of the dc power source is 12V.
  4. 4. A wake-up method, comprising waking up using the BMS-based CC2 single wake-up circuit according to any of claims 1-3.
  5. 5. An electric automobile is characterized in that the electric automobile adopts the BMS-based CC2 single wake-up circuit according to any one of claims 1-3 for wake-up control.

Description

CC2 single wake-up circuit and wake-up method of BMS and electric automobile Technical Field The invention belongs to the technical field of new energy, and particularly relates to a CC2 single wake-up circuit and a wake-up method of a BMS and an electric automobile. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. At present, the traditional Chinese standard is adopted in a CC2 awakening circuit of the BMS, the A+ signal always exists, a host factory wakes up the BMS by the A+ signal by default, and a handshake message starts to be sent after the level of the A+ signal is detected, so the A+ signal is adopted to wake up the BMS, then the BMS detects the level value of the BMS, the BMS is carried out downwards after meeting the requirements, in the new Chinese standard, the A+ signal always is low level, the traditional prescribed standard and the awakening circuit of the new standard cannot be completely compatible, the existing awakening circuit cannot meet the awakening requirement, and meanwhile, the A+ signal is used, so that a quick-charging gun is always on, and power loss is caused. Disclosure of Invention The invention mainly solves the technical problem that the traditional Chinese standard adopts an A+ signal to wake up the BMS and can not meet the wake-up requirement, and the first aspect of the invention provides a CC2 single wake-up circuit of the BMS, which can realize single wake-up of the CC2 by matching a PMOS tube with a charging gun switch and switching on and off the PMOS tube, so that the BMS can not be always woken up even if a quick charging gun is always on, and the power consumption is reduced while the new national standard is met. In order to achieve the above purpose, the present invention adopts the following technical scheme: The CC2 single wake-up circuit of the BMS comprises a PMOS tube, wherein the gate electrode of the PMOS tube is connected with a direct current power supply through a delay capacitor, the source electrode of the PMOS tube is connected with the direct current power supply, and the drain electrode of the PMOS tube is connected to the BMS through a DCDC enabling pin; the charging gun switch is connected with the wake-up circuit through the charging gun switch; When the charging gun switch is turned off, the output voltage of the enabling pin of the DCDC is 0V, and the BMS sleeps; when the charging gun switch is switched on, the delay capacitor discharges, the PMOS tube is conducted, the output voltage of the enabling pin of DCDC is increased from 0V to the DC power supply voltage value, the BMS is awakened, the capacitor charges, the voltage of one side of the capacitor, which is close to the PMOS tube, is increased to the DC power supply voltage value, the gate voltage of the PMOS is equal to the source voltage, the PMOS tube is cut off, and the output voltage of the enabling pin of DCDC is changed into 0V. A second aspect of the present invention provides a wake-up method using the BMS-based CC2 single wake-up circuit of the first aspect. The third aspect of the invention provides an electric automobile, which adopts the CC2 single wake-up circuit based on the BMS in the first aspect to perform wake-up control. The beneficial effects of the invention are as follows: The invention is based on the technical problem that the traditional Chinese standard adopts the A+ signal to wake up the BMS and can not meet the wake-up requirement, and based on the new national standard, the A+ signal is always low level, the PMOS tube and the charging gun switch are matched, and the single wake-up of the CC2 can be realized through the connection and disconnection of the PMOS tube, so that the BMS can not be always awakened even if the quick charging gun is always on line, and the power consumption is reduced while the new national standard is met. Additional aspects of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention. Drawings The accompanying drawings, which 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. Fig. 1 is a connection diagram of a CC2 single wake-up circuit structure based on a BMS according to an embodiment of the present invention. Detailed Description The invention will be further described with reference to the drawings and examples. The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which