CN218183055U - Overcharge protection system for electric vehicle - Google Patents
Overcharge protection system for electric vehicle Download PDFInfo
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- CN218183055U CN218183055U CN202222373341.6U CN202222373341U CN218183055U CN 218183055 U CN218183055 U CN 218183055U CN 202222373341 U CN202222373341 U CN 202222373341U CN 218183055 U CN218183055 U CN 218183055U
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- charger
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an overcharge protection system for electric motor car includes: a charger; the overcharge protection module is electrically connected with the output voltage port in of the charger; the chopping unit is electrically connected with the overcharge protection module; the buffer power supply module is electrically connected with the chopping unit; the overvoltage control module is electrically connected with the buffer power supply module; the utility model discloses a diode D1 and diode D2 constitute overcharge voltage protection circuit, when charger output voltage surpassed diode D1 conduction voltage, triode Q1 got the electricity and switched on, cut off the transmission of overvoltage, guarantee the safety of charger; then, a chopper circuit is formed by the resistor R2, the capacitor C1 and the diode D6, voltage regulation is carried out on voltage in the charging process, power supply with the same threshold voltage is avoided, the transistor BT1 carries out buffer power supply according to the pulse simulation control end, and the over-saturation impact on the battery is reduced; the diode D7 detects the voltage value of the battery, controls the operation of the relay T and ensures the electricity storage safety of the battery.
Description
Technical Field
The utility model belongs to the protection field of charging, concretely relates to overcharge protection system for electric motor car.
Background
The charger is a charging device which adopts a high-frequency power supply technology and applies an advanced intelligent dynamic adjustment charging technology, and a battery is used as one of the core components of the vehicle and is an energy supply center of the electric vehicle.
Present electric vehicle charges mostly all in evening go on, because there is sufficient time to charge for electric vehicle, extract electric vehicle's charger through evening, can aggravate the ageing of battery at the power supply in-process that lasts, it is in the saturated state to keep the battery all the time, in case some electric energy of battery loss, the charger will secondary power supply, and then reduce battery life, and the supply voltage who keeps same threshold value all the time, when the battery reaches the saturation, will make the battery be in the state of generating heat, in addition, can't obtain the change of voltage value according to the battery, the operation of control charger.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: an overcharge protection system for an electric vehicle is provided to solve the above problems of the prior art.
The technical scheme is as follows: an overcharge protection system for an electric vehicle, comprising:
the charger converts the mains voltage into the power supply voltage required by the electric vehicle and outputs the power supply voltage to the overcharge protection module,
the overcharge protection module detects the output voltage through a diode D1 and a diode D2, controls the on-off of the triode Q1 and transmits the conducted voltage to the chopping unit;
the chopper unit regulates the voltage in the charging process through a resistor R2, a capacitor C1 and a diode D6, and transmits the voltage to the buffer power supply module;
the buffer power supply module is used for performing buffer power supply through the transistor BT1 analog control end and transmitting the buffer power supply to the overvoltage control module;
and the overvoltage control module detects the voltage value of the battery through the diode D7, controls the operation of the relay T and outputs voltage.
In a further embodiment, the overcharge protection module comprises a resistor R1, a triode Q1, a diode D2, an inductor L1 and a diode D3, wherein one end of the resistor R1 is connected with the output voltage port in of the charger; the other end of the resistor R1 is respectively connected with a collector terminal of the triode Q1, a cathode terminal of the diode D3 and one end of the inductor L1; the base end of the triode Q1 is connected with the cathode end of the diode D2; the positive end of the diode D2 is connected with the positive end of the diode D1; the emitter end of the triode Q1 is connected with the ground D; the other end of the inductor L1 is connected with the positive end of the diode D3.
In a further embodiment, the chopper unit includes a diode D5, a diode D4, a resistor R2, a capacitor C1, and an inductor L2, wherein a negative terminal of the diode D4 is connected to a ground GND; the positive end of the diode D4 is connected with the positive end of the diode D5 and one end of the capacitor C1 respectively; the negative end of the diode D5 is respectively connected with one end of the resistor R2 and the positive end of the diode D6; the other end of the resistor R2 is connected with the other end of the capacitor C1 and the negative electrode end of the diode D6 respectively.
In a further embodiment, the buffer power supply module comprises an inductor L2, a capacitor C2, a diode D9, a transistor BT1, a diode D8 and a capacitor C3, wherein one end of the inductor L2 is connected to the positive end of the diode D6; the other end of the inductor L2 is connected with a No. 1 pin of the transistor BT1 and one end of the capacitor C2 respectively; the other end of the capacitor C2 is connected with the positive end of the diode D9 and one end of the capacitor C3 respectively; the No. 2 pin of the transistor BT1 is connected with a pulse analog control end; and the cathode end of the diode D9 is respectively connected with the No. 3 pin of the transistor BT1, the cathode end of the diode D8 and the power supply port OUT.
In a further embodiment, the overvoltage control module comprises a resistor R3, a transistor Q3, a triode Q2, a diode D7, a relay T and a normally closed contact S1, wherein a pin 3 of the transistor Q3 is respectively connected with one end of the resistor R3, a negative end of the diode D7 and a power supply port OUT; the pin No. 2 of the transistor Q3 is respectively connected with the other end of the resistor R3 and the collector end of the triode Q2; the base end of the triode Q2 is connected with the positive end of a diode D7; the emitter terminal of the triode Q2 is respectively connected with one end of the relay T and the ground wire GND; the other end of the relay T is connected with a No. 1 pin of a transistor Q3; one end of the normally closed contact S1 is connected with the positive end of the diode D3; the other end of the normally closed contact S1 is connected with the cathode end of the diode D5.
In a further embodiment, an input voltage port of the charger is connected to a mains voltage, and an output voltage port is connected to the resistor R1; the power supply port OUT is connected with a power utilization device.
In a further embodiment, the relay T is linked with the normally closed contact S1, and when the relay T is electrified, the normally closed contact S1 is disconnected; the types of the triode Q1 and the triode Q2 are both NPN.
Has the beneficial effects that: the utility model relates to an overcharge protection system for electric vehicle, which comprises an overcharge voltage protection circuit composed of a diode D1 and a diode D2, when the output voltage of a charger exceeds the conduction voltage of the diode D1, a triode Q1 is electrified and conducted, the transmission of overvoltage is cut off, and the safety of the charger is ensured; then, a chopper circuit is formed by the resistor R2, the capacitor C1 and the diode D6, voltage in the charging process is regulated, power supply of the same threshold voltage is avoided, the transistor BT1 performs buffer power supply according to the pulse analog control end, and the over-saturation impact on the battery is reduced; the diode D7 detects the voltage value of the battery, controls the operation of the relay T and ensures the electricity storage safety of the battery.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
An overcharge protection system for an electric vehicle, comprising:
a charger; an input voltage port of the charger is connected with a mains voltage, and an output voltage port of the charger is connected with the resistor R1; the power supply port OUT is connected with a power utilization device.
The overcharge protection module is electrically connected with an output voltage port in of the charger; the overcharge protection module comprises a resistor R1, a triode Q1, a diode D2, an inductor L1 and a diode D3.
One end of the resistor R1 in the overcharge protection module is connected with an output voltage port in of the charger; the other end of the resistor R1 is respectively connected with a collector end of the triode Q1, a cathode end of the diode D3 and one end of the inductor L1; the base electrode end of the triode Q1 is connected with the cathode end of the diode D2; the positive end of the diode D2 is connected with the positive end of the diode D1; the emitter end of the triode Q1 is connected with the ground D; the other end of the inductor L1 is connected with the positive end of the diode D3.
The chopping unit is electrically connected with the overcharge protection module; the chopping unit comprises a diode D5, a diode D4, a resistor R2, a capacitor C1 and an inductor L2.
The negative end of the diode D4 in the chopping unit is connected with a ground wire GND; the positive end of the diode D4 is connected with the positive end of the diode D5 and one end of the capacitor C1 respectively; the negative end of the diode D5 is respectively connected with one end of the resistor R2 and the positive end of the diode D6; the other end of the resistor R2 is connected with the other end of the capacitor C1 and the negative electrode end of the diode D6 respectively.
The buffer power supply module is electrically connected with the chopping unit; the buffer power supply module comprises an inductor L2, a capacitor C2, a diode D9, a transistor BT1, a diode D8 and a capacitor C3.
One end of the inductor L2 in the buffering power supply module is connected with the positive end of the diode D6; the other end of the inductor L2 is connected with a No. 1 pin of the transistor BT1 and one end of the capacitor C2 respectively; the other end of the capacitor C2 is connected with the positive end of the diode D9 and one end of the capacitor C3 respectively; the No. 2 pin of the transistor BT1 is connected with a pulse analog control end; and the cathode end of the diode D9 is respectively connected with the No. 3 pin of the transistor BT1, the cathode end of the diode D8 and the power supply port OUT.
The overvoltage control module is electrically connected with the buffer power supply module; the overvoltage control module comprises a resistor R3, a transistor Q3, a triode Q2, a diode D7, a relay T and a normally closed contact S1.
A No. 3 pin of the transistor Q3 in the overvoltage control module is respectively connected with one end of a resistor R3, a negative end of a diode D7 and a power supply port OUT; the pin No. 2 of the transistor Q3 is respectively connected with the other end of the resistor R3 and the collector end of the triode Q2; the base end of the triode Q2 is connected with the positive end of a diode D7; the emitter terminal of the triode Q2 is respectively connected with one end of the relay T and the ground wire GND; the other end of the relay T is connected with a No. 1 pin of a transistor Q3; one end of the normally closed contact S1 is connected with the positive end of the diode D3; the other end of the normally closed contact S1 is connected with the cathode end of the diode D5.
Description of the working principle: firstly, connecting a resistor R1 with the regulated output voltage of the charger, and detecting the voltage output by the charger by a diode D1;
when the diode D1 is subjected to reverse breakdown by the voltage detected by the diode D1, the triode Q1 is electrified and conducted, and the output voltage exceeding the set voltage value is transmitted to the ground, so that the damage of the rechargeable battery is avoided;
when the voltage detected by the diode D1 does not enable the diode D1 to be reversely broken down, the diode D2 reversely transmits the current regulated by the constant current of the inductor L1, and then multiple constant current processing is carried out; the resistor R2, the capacitor C1 and the diode D6 form a chopper circuit, voltage regulation is carried out on voltage in the charging process, power supply with the same threshold voltage is avoided, the capacitor C1 provides reserve voltage, the inductor L2 carries out current stabilization, the transistor BT1 carries out buffer power supply according to a pulse simulation control end, and the over-saturation impact on a battery is reduced; the diode D7 detects the voltage value of the battery;
when the voltage of the battery exceeds the conduction voltage value of the diode D7, the triode Q2 is conducted, the transistor Q3 is electrified and conducted, the relay T is electrified at the moment, the normally closed contact S1 is disconnected, the charger does not have voltage output at the moment, and the charger and the electric vehicle battery are protected.
As described above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limited to the present invention itself, but may be modified in various forms and details without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (5)
1. An overcharge protection system for an electric vehicle, comprising:
a charger;
the overcharge protection module is electrically connected with an output voltage port in of the charger;
the chopping unit is electrically connected with the overcharge protection module;
the buffer power supply module is electrically connected with the chopping unit;
the overvoltage control module is electrically connected with the buffer power supply module;
the overcharge protection module comprises a resistor R1, a triode Q1, a diode D2, an inductor L1 and a diode D3, wherein one end of the resistor R1 is connected with an output voltage port in of the charger; the other end of the resistor R1 is respectively connected with a collector end of the triode Q1, a cathode end of the diode D3 and one end of the inductor L1; the base end of the triode Q1 is connected with the cathode end of the diode D2; the positive end of the diode D2 is connected with the positive end of the diode D1; the emitter end of the triode Q1 is connected with the ground D; the other end of the inductor L1 is connected with the positive end of the diode D3.
2. An overcharge protection system for use in an electric vehicle according to claim 1, wherein: the chopper unit comprises a diode D5, a diode D4, a resistor R2, a capacitor C1 and an inductor L2, wherein the negative pole end of the diode D4 is connected with a ground wire GND; the positive end of the diode D4 is connected with the positive end of the diode D5 and one end of the capacitor C1 respectively; the cathode end of the diode D5 is respectively connected with one end of the resistor R2 and the anode end of the diode D6; the other end of the resistor R2 is connected with the other end of the capacitor C1 and the negative electrode end of the diode D6 respectively.
3. An overcharge protection system for an electric vehicle according to claim 2, wherein: the buffer power supply module comprises an inductor L2, a capacitor C2, a diode D9, a transistor BT1, a diode D8 and a capacitor C3, wherein one end of the inductor L2 is connected with the positive end of the diode D6; the other end of the inductor L2 is connected with a No. 1 pin of the transistor BT1 and one end of the capacitor C2 respectively; the other end of the capacitor C2 is connected with the positive end of the diode D9 and one end of the capacitor C3 respectively; the No. 2 pin of the transistor BT1 is connected with a pulse analog control end; and the cathode end of the diode D9 is respectively connected with the No. 3 pin of the transistor BT1, the cathode end of the diode D8 and the power supply port OUT.
4. An overcharge protection system for use in an electric vehicle according to claim 3, wherein: the overvoltage control module comprises a resistor R3, a transistor Q3, a triode Q2, a diode D7, a relay T and a normally closed contact S1, wherein a No. 3 pin of the transistor Q3 is respectively connected with one end of the resistor R3, a negative end of the diode D7 and a power supply port OUT; a pin 2 of the transistor Q3 is respectively connected with the other end of the resistor R3 and the collector end of the triode Q2; the base end of the triode Q2 is connected with the positive end of a diode D7; the emitter terminal of the triode Q2 is respectively connected with one end of the relay T and the ground wire GND; the other end of the relay T is connected with a No. 1 pin of a transistor Q3; one end of the normally closed contact S1 is connected with the positive end of the diode D3; the other end of the normally closed contact S1 is connected with the cathode end of the diode D5.
5. An overcharge protection system for use in an electric vehicle according to claim 4, wherein: an input voltage port of the charger is connected with mains voltage, and an output voltage port of the charger is connected with the resistor R1; the power supply port OUT is connected with a power utilization device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222373341.6U CN218183055U (en) | 2022-09-07 | 2022-09-07 | Overcharge protection system for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222373341.6U CN218183055U (en) | 2022-09-07 | 2022-09-07 | Overcharge protection system for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218183055U true CN218183055U (en) | 2022-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222373341.6U Active CN218183055U (en) | 2022-09-07 | 2022-09-07 | Overcharge protection system for electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218183055U (en) |
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2022
- 2022-09-07 CN CN202222373341.6U patent/CN218183055U/en active Active
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