CN212500002U - Electric automobile awakening circuit - Google Patents
Electric automobile awakening circuit Download PDFInfo
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- CN212500002U CN212500002U CN202021142805.7U CN202021142805U CN212500002U CN 212500002 U CN212500002 U CN 212500002U CN 202021142805 U CN202021142805 U CN 202021142805U CN 212500002 U CN212500002 U CN 212500002U
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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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Abstract
The utility model discloses an electric automobile awakening circuit, awaken the source including the low pressure, the voltage protection unit, resistance voltage-dividing unit, the filtering unit, LDO steady voltage source unit, little the control unit and main power source unit, the input and the low pressure of voltage protection unit awaken the source and are connected, resistance voltage-dividing unit's input is connected with the output of voltage protection unit, the output of voltage protection unit is connected with the input of LDO steady voltage source unit, resistance voltage-dividing unit's output and the enable end of LDO steady voltage source unit are connected, little the control unit and main power source unit all are connected with the output of LDO steady voltage source unit. The utility model discloses circuit structure is simple, and the loss is low, and is with low costs, and application scope is extensive, when awakening up battery management system, provides powerful assurance for little the control unit's stability, reliable operation.
Description
Technical Field
The utility model relates to an electric automobile technical field specifically is an electric automobile awakening circuit.
Background
In order to reduce the power consumption when the electric vehicle is not in operation, the battery management system is usually in a sleep state when the battery is not in operation. If the battery pack needs to supply power to the outside or needs to charge the battery of the electric automobile, the battery management system needs to be awakened, and the battery management system is in a working state, so that the monitoring and the protection of the battery pack are realized. The problem that the system is mistakenly awakened due to interference signals exists in the conventional electric automobile awakening circuit, so that unnecessary faults occur during charging, two circuits are required to be realized under two conditions of charging and driving, the circuit is complex, the safety level is low, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an electric automobile awakens circuit up, circuit structure is simple, and the loss is low, and is with low costs, and the application scope is extensive, when awakening up battery management system, provides powerful assurance for little the control unit's stability, reliable operation.
The technical scheme of the utility model is that:
an electric automobile wake-up circuit comprises a low-voltage wake-up source, a voltage protection unit, a resistance voltage division unit, a filtering unit, an LDO voltage stabilization source unit, a micro control unit and a main power supply unit; the voltage protection unit comprises a transient suppression diode D1, a fuse F1 and a diode D2, wherein the cathode of the transient suppression diode D1 and the anode of the diode D2 are both connected with a low-voltage wake-up source, the anode of the transient suppression diode D1 is grounded, and the cathode of the diode D2 is connected with one end of the fuse F1; the resistance voltage division unit comprises a resistor R1 and a resistor R2, one end of the resistor R1 is connected with the other end of the fuse F1, one end of the resistor R2 is connected with the other end of the resistor R1, and the other end of the resistor R2 is grounded; the filtering unit comprises a capacitor C1 and a capacitor C2, one end of the capacitor C1 is connected with the other end of the fuse F1, the other end of the capacitor C1 is grounded, one end of the capacitor C2 is connected with the other end of the resistor R1, and the other end of the capacitor C2 is grounded; the LDO voltage-stabilizing power supply unit comprises a voltage-stabilizing chip U1, a VDD pin of a voltage-stabilizing chip U1 is connected with the other end of a fuse F1, a CE pin of the voltage-stabilizing chip U1 is connected with the other end of a resistor R1, a GND pin of a voltage-stabilizing chip U1 is grounded, and an IO port of the micro control unit and a CE enable pin of the main power supply unit are both connected with a Vout pin of a voltage-stabilizing chip U1.
The IO port of the micro control unit is connected with a Vout pin of the voltage stabilizing chip U1 and used for the micro control unit to confirm the state of the awakening source, and the CE enabling pin of the main power supply unit is connected with the Vout pin of the voltage stabilizing chip U1 and used for awakening the battery management system of the main power supply unit.
The low-voltage wake-up source is DC voltage of 6-32V.
The type of the transient suppression diode D1 is SMAJ 36A.
The diode D2 is a Schottky diode with the model number of BAS 40H.
The type of the voltage stabilizing chip U1 is R1524N 050B.
The utility model has the advantages that:
the utility model has good anti-interference performance, enables the LDO voltage stabilization chip to work through the enabling voltage, and prevents an interference signal from mistakenly waking up the MCU; the utility model discloses the circuit is simple and with low costs, when awakening up battery management system, and realizes that little the control unit confirms the purpose of awakening up the source state, and work efficiency is high.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the electric vehicle WAKE-UP circuit includes a low voltage WAKE-UP source WAKE UP (DC voltage of 6-32V), a voltage protection unit, a resistance voltage division unit, a filtering unit, an LDO voltage regulator unit, a micro control unit MCU, and a main POWER supply unit POWER;
the voltage protection unit comprises a transient suppression diode D1(SMAJ36A), a fuse F1 and a Schottky diode D2(BAS40H), the cathode of the transient suppression diode D1 and the anode of the Schottky diode D2 are both connected with a low-voltage wake-up source, the anode of the transient suppression diode D1 is grounded, the cathode of the Schottky diode D2 is connected with one end of the fuse F1, the transient suppression diode D1 and the fuse F1 play a role in protecting voltage, and the Schottky diode D2 prevents the voltage from reversing;
the resistance voltage dividing unit comprises a resistor R1 and a resistor R2, one end of a resistor R1 is connected with the other end of a fuse F1, one end of a resistor R2 is connected with the other end of a resistor R1, the other end of a resistor R2 is grounded, the resistor R1 is 30.1K omega/0.1%, the resistor R2 is 10K omega/0.1%, the resistance voltage dividing unit can prevent the input voltage from exceeding the maximum input voltage of the voltage stabilizing chip U1, so that the chip is protected, the threshold voltage of the enabling end can be improved, the influence of small-level input interference is avoided, and the stability is improved;
the filtering unit comprises a capacitor C1 and a capacitor C2, one end of the capacitor C1 is connected with the other end of the fuse F1, the other end of the capacitor C1 is grounded, one end of the capacitor C2 is connected with the other end of the resistor R1, and the other end of the capacitor C2 is grounded;
the LDO voltage-stabilizing source unit comprises a voltage-stabilizing chip U1(R1524N050B), a VDD pin of the voltage-stabilizing chip U1 is connected with the other end of a fuse F1, a CE pin of the voltage-stabilizing chip U1 is connected with the other end of a resistor R1, a GND pin of the voltage-stabilizing chip U1 is grounded, and an IO port of the MCU and a CE enable pin of the POWER supply unit POWER are both connected with a Vout pin of the voltage-stabilizing chip U1; the IO port of the MCU is connected with the Vout pin of the voltage stabilizing chip U1 and used for the MCU to confirm the state of the awakening source, the CE enable pin of the main POWER supply unit POWER is connected with the Vout pin of the voltage stabilizing chip U1 and can output a stable 5V high level to awaken the battery management system of the electric automobile and avoid interference.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an electric automobile awakening circuit which characterized in that: the device comprises a low-voltage wake-up source, a voltage protection unit, a resistance voltage division unit, a filtering unit, an LDO voltage stabilization source unit, a micro control unit and a main power supply unit; the voltage protection unit comprises a transient suppression diode D1, a fuse F1 and a diode D2, wherein the cathode of the transient suppression diode D1 and the anode of the diode D2 are both connected with a low-voltage wake-up source, the anode of the transient suppression diode D1 is grounded, and the cathode of the diode D2 is connected with one end of the fuse F1; the resistance voltage division unit comprises a resistor R1 and a resistor R2, one end of the resistor R1 is connected with the other end of the fuse F1, one end of the resistor R2 is connected with the other end of the resistor R1, and the other end of the resistor R2 is grounded; the filtering unit comprises a capacitor C1 and a capacitor C2, one end of the capacitor C1 is connected with the other end of the fuse F1, the other end of the capacitor C1 is grounded, one end of the capacitor C2 is connected with the other end of the resistor R1, and the other end of the capacitor C2 is grounded; the LDO voltage-stabilizing power supply unit comprises a voltage-stabilizing chip U1, a VDD pin of a voltage-stabilizing chip U1 is connected with the other end of a fuse F1, a CE pin of the voltage-stabilizing chip U1 is connected with the other end of a resistor R1, a GND pin of a voltage-stabilizing chip U1 is grounded, and an IO port of the micro control unit and a CE enable pin of the main power supply unit are both connected with a Vout pin of a voltage-stabilizing chip U1.
2. The electric vehicle wake-up circuit according to claim 1, wherein: the IO port of the micro control unit is connected with a Vout pin of the voltage stabilizing chip U1 and used for the micro control unit to confirm the state of the awakening source, and the CE enabling pin of the main power supply unit is connected with the Vout pin of the voltage stabilizing chip U1 and used for awakening the battery management system of the main power supply unit.
3. The electric vehicle wake-up circuit according to claim 1, wherein: the low-voltage wake-up source is DC voltage of 6-32V.
4. The electric vehicle wake-up circuit according to claim 1, wherein: the type of the transient suppression diode D1 is SMAJ 36A.
5. The electric vehicle wake-up circuit according to claim 1, wherein: the diode D2 is a Schottky diode with the model number of BAS 40H.
6. The electric vehicle wake-up circuit according to claim 1, wherein: the type of the voltage stabilizing chip U1 is R1524N 050B.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020859028 | 2020-05-19 | ||
| CN2020208590281 | 2020-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212500002U true CN212500002U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021142805.7U Active CN212500002U (en) | 2020-05-19 | 2020-06-18 | Electric automobile awakening circuit |
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| Country | Link |
|---|---|
| CN (1) | CN212500002U (en) |
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2020
- 2020-06-18 CN CN202021142805.7U patent/CN212500002U/en active Active
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