Power supply coordination control system for driving and parking dual-purpose vehicle-mounted air conditioner
By detecting the battery voltage switching power supply module and using the generator power supply module to power and charge the vehicle air conditioner, the problem of battery over-discharge caused by the difference in voltage and current demand of the vehicle air conditioner when driving and parking is solved, thus achieving power supply stability and normal vehicle starting.
Patent Information
- Application Number
- CN202512023316.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-02-27
AI Technical Summary
The voltage and current requirements of a car's air conditioner differ when driving and when parked. Insufficient battery power when parked can easily lead to the inability to start the vehicle.
Design a vehicle air conditioning power supply coordination control system that can be used for both driving and parking. By detecting the battery voltage and switching the power supply module, the system utilizes the generator power supply module to supply power and charge the vehicle air conditioning when the battery power is insufficient. A delay control is set to ensure stable voltage switching.
It effectively avoids battery over-discharge, ensures the vehicle can start normally, and achieves power supply stability under different driving conditions.
Smart Images
Figure CN121572906A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power supply, specifically to a vehicle-mounted air conditioning power supply coordination control system that can be used for both driving and parking. Background Technology
[0002] The core reason for the difference in voltage and current requirements of vehicle air conditioning when driving and parking lies in the fundamental change in power supply and system load. When driving, the engine drives the alternator, providing a stable voltage of around 14V and a sufficient current of nearly 100 amps. At this time, the air conditioning compressor is directly driven by the engine, and the main power is used only for the blower, etc., with very little power supply pressure. However, when parking, only the battery provides power, and the voltage drops continuously from around 12V. The current for all loads (such as the blower, or, if it is an electric compressor, the current demand is huge) is entirely borne by the battery, which can easily lead to battery depletion and prevent the vehicle from starting. This requires improvement. Summary of the Invention
[0003] The purpose of this invention is to provide a vehicle air conditioning power supply coordination control system that can be used for both driving and parking, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, the present invention provides the following technical solution: A dual-purpose vehicle air conditioning power supply coordination control system for both driving and parking includes: The battery power supply module is used to supply power to the vehicle's air conditioning when the vehicle is parked and the battery has sufficient charge. The generator power supply module is used to power the vehicle's air conditioning when the vehicle is in motion, and to power the vehicle's air conditioning and charge the battery when the vehicle is parked and the battery is low. The power supply switching module is used to determine whether the battery has sufficient power by detecting the battery voltage. When the battery has sufficient power, it controls the battery power supply module to supply power; when the battery has insufficient power, it controls the generator power supply module to supply power. After the first delay, it controls the battery power supply module to stop supplying power, and after the second delay, it controls the generator power supply module to charge the battery. The first delay is shorter than the second delay. The output terminal of the battery power supply module is connected to the first input terminal (eighth resistor) of the power supply switching module. The first output terminal of the generator power supply module is connected to the first input terminal (second resistor) of the battery power supply module. The first output terminal of the power supply switching module is connected to the second input terminal (common point A1) of the battery power supply module. The second output terminal of the power supply switching module is connected to the first input terminal (common point A2) of the generator power supply module. The third output terminal of the power supply switching module is connected to the second input terminal (fifth diode) of the generator power supply module.
[0005] As a further embodiment of the present invention: the battery power supply module includes a first capacitor, a sixth diode, a second transistor, a battery, a seventh resistor, and an eighth resistor. The negative terminal of the battery is grounded, the positive terminal of the battery is connected to the collector of the second transistor, one end of the seventh resistor, the other end of the seventh resistor is connected to one end of the eighth resistor, the first input terminal of the power supply switching module, the other end of the eighth resistor is grounded, the base of the second transistor is connected to the first output terminal of the power supply switching module, the emitter of the second transistor is connected to the anode of the sixth diode, the cathode of the sixth diode is connected to one end of the first capacitor and the vehicle air conditioner, and the other end of the first capacitor is grounded.
[0006] As a further embodiment of the present invention: the generator power supply module includes a first diode, a third diode, a first transistor, a second resistor, and a generator power supply circuit. The first terminal of the generator power supply circuit is connected to the negative terminal of the first diode, the positive terminal of the first diode is connected to the second output terminal of the power supply switching module, the second terminal of the generator power supply circuit is connected to the positive terminal of the third diode, the negative terminal of the third diode is connected to the vehicle air conditioner, the collector of the first transistor, the base of the first transistor is connected to the third output terminal of the power supply switching module, the emitter of the first transistor is connected to one end of the second resistor, and the other end of the second resistor is connected to the first input terminal of the battery power supply module.
[0007] As a further aspect of the present invention: the power supply switching module includes: The battery power supply control unit is used to detect the battery voltage and obtain the sampling voltage (the voltage across the eighth resistor). When the sampling voltage is greater than the first reference voltage, it outputs the first voltage signal to construct the power supply circuit for the battery power supply module and the vehicle air conditioner (common point A1 is high level). The generator power supply control unit is used to output a second voltage signal to control the generator power supply module to work (common point A2 is high level) when the sampled voltage is lower than the second reference voltage, to establish a power supply circuit between the generator power supply module and the vehicle air conditioner, and to control the battery power supply control unit to stop outputting the first voltage signal after the first delay (when the third capacitor is charging); and to control the generator power supply module to supply power to the battery after the second delay (when the second capacitor is charging); the first delay time is shorter than the second delay time; the first reference voltage is less than the second reference voltage; The power supply unit is used to determine that the battery charging is complete when the amplified voltage corresponding to the battery charging current is less than the third reference voltage and the sampled voltage is greater than the fourth reference voltage. It then controls the generator power supply control unit to stop outputting the second voltage signal and restores the power supply circuit of the battery power supply module and the vehicle air conditioner. The first input terminal of the battery power supply control unit is connected to the output terminal of the battery power supply module, the first input terminal of the generator power supply control unit, and the first input terminal of the power restoration unit (at the eighth resistor). The output terminal of the battery power supply control unit is connected to the second input terminal of the battery power supply module (common point A1). The second input terminal of the battery power supply control unit is connected to the second output terminal of the generator power supply control unit (common point A5). The first output terminal of the generator power supply control unit is connected to the first input terminal of the generator power supply module (common point A2). The third output terminal of the generator power supply control unit is connected to the second input terminal of the generator power supply module (at the fifth diode). The second input terminal of the power restoration unit is connected to the first output terminal of the generator power supply module (at the second resistor). The output terminal of the power restoration unit is connected to the second input terminal of the generator power supply control unit (at the gate of the fourth MOSFET).
[0008] As a further embodiment of the present invention: the battery power supply control unit includes a first amplifier, a fifth MOSFET, and a ninth diode. The non-inverting input of the first amplifier is connected to the output terminal of the battery power supply module, the inverting input of the first amplifier is connected to a first reference voltage, the output terminal of the first amplifier is connected to the source (S) terminal of the fifth MOSFET, the drain (D) terminal of the fifth MOSFET is connected to the second input terminal of the battery power supply module, the gate (G) terminal of the fifth MOSFET is connected to the anode of the ninth diode, and the cathode of the ninth diode is connected to the second output terminal of the generator power supply control unit.
[0009] As a further embodiment of the present invention: the generator power supply control unit includes a second amplifier, a fourth MOSFET, a seventh diode, a tenth resistor, a third capacitor, an eighth diode, a fourth diode, a first resistor, a second capacitor, and a fifth diode. The inverting input of the second amplifier is connected to the output of the battery power supply module, and the non-inverting input of the second amplifier is connected to a second reference voltage. The output of the second amplifier is connected to the source (S) terminal of the fourth MOSFET. The gate (G) terminal of the fourth MOSFET is connected to the output of the recovery power supply unit. The drain (D) terminal of the fourth MOSFET is connected to the anode of the seventh diode, the first input terminal of the generator power supply module, and the anode of the fourth diode. The cathode of the seventh diode is connected to one end of the tenth resistor. The other end of the tenth resistor is connected to one end of the third capacitor and the anode of the eighth diode. The other end of the third capacitor is grounded. The cathode of the eighth diode is connected to the second input terminal of the battery power supply control unit. The cathode of the fourth diode is connected to one end of the first resistor. The other end of the first resistor is connected to one end of the second capacitor and the cathode of the fifth diode. The other end of the second capacitor is grounded. The anode of the fifth diode is connected to the second input terminal of the generator power supply module.
[0010] As a further embodiment of the present invention: the power restoration unit includes a fourth amplifier, a ninth resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a fifth amplifier, a third amplifier, and a third MOSFET. The drain (D) terminal of the third MOSFET is connected to the output terminal of the battery power supply module. The source (S) terminal of the third MOSFET is connected to the non-inverting input of the fourth amplifier. The inverting input of the fourth amplifier is connected to a fourth reference voltage. The output terminal of the fourth amplifier is connected to one end of the ninth resistor. The other end of the ninth resistor is connected to the second input terminal of the generator power supply control unit. The source (S) terminal of the third MOSFET is connected to the output terminal of the third amplifier. The non-inverting input of the third amplifier is connected to the third reference voltage. The inverting input of the third amplifier is connected to the output terminal of the fifth amplifier and one end of the sixth resistor. The non-inverting input of the fifth amplifier is connected to one end of the third resistor and one end of the fourth resistor. The other end of the fourth resistor is grounded. The other end of the third resistor is connected to the first output terminal of the generator power supply module. The other end of the sixth resistor is connected to one end of the fifth resistor and the inverting input of the fifth amplifier. The other end of the fifth resistor is connected to the first output terminal of the generator power supply module.
[0011] As a further aspect of the present invention: the dual-purpose vehicle air conditioning power supply coordination control system for driving and parking also includes: a fault detection and processing module, used to monitor whether the second voltage signal (high level of common point A2) successfully controls the generator power supply module to work. If it fails, it outputs another voltage signal (high level of common point A4) to control the generator power supply module to work. If the generator power supply module fails to start working after the third delay, it controls the battery power supply module to stop supplying power to the vehicle air conditioning to avoid the battery being over-discharged and unable to start the vehicle. The first input terminal of the fault detection and processing module is connected to the second output terminal of the power supply switching module (common point A2), the second input terminal of the fault detection and processing module is connected to the second output terminal of the generator power supply module (common point A3), the first output terminal of the fault detection and processing module is connected to the third input terminal of the generator power supply module (common point A4), and the second output terminal of the fault detection and processing module is connected to the second input terminal of the battery power supply control unit (common point A5).
[0012] As a further embodiment of the present invention: the fault detection and processing module includes a tenth diode, an eleventh diode, an XOR gate, an eleventh resistor, a fourth capacitor, and a twelfth diode. The positive terminal of the tenth diode is connected to the second output terminal of the generator power supply module, and the negative terminal of the tenth diode is connected to one input terminal of the XOR gate. The positive terminal of the eleventh diode is connected to the second output terminal of the power supply switching module, and the negative terminal of the eleventh diode is connected to the other input terminal of the XOR gate. The output terminal of the XOR gate is connected to one end of the eleventh resistor and the third input terminal of the generator power supply module. The other end of the eleventh resistor is connected to one end of the fourth capacitor and the positive terminal of the twelfth diode. The other end of the fourth capacitor is grounded, and the negative terminal of the twelfth diode is connected to the second input terminal of the battery power supply control unit.
[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: When the vehicle is parked, the present invention will detect the battery power. When the battery power is insufficient, it will control the generator to supply power. After the first delay, the battery power supply will be disconnected to ensure stable power supply. After the second delay, the generator will be controlled to supply power to the battery until the battery is fully charged and then the battery power supply will be restored. This avoids the inability to start the vehicle due to over-discharge of the battery. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of a vehicle-mounted air conditioning power supply coordination control system that can be used for both driving and parking.
[0015] Figure 2 Circuit diagrams for the battery power supply module, generator power supply module, and power switching module.
[0016] Figure 3 This is the circuit diagram for the fault detection and processing module. Detailed Implementation
[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0018] Please see Figure 1 A vehicle-mounted air conditioning power supply coordination control system for both driving and parking uses, comprising: The battery power supply module is used to supply power to the vehicle air conditioner X when the vehicle is parked and the battery E1 has sufficient charge. The generator power supply module is used to power the vehicle air conditioner X when the vehicle is in motion, and to power the vehicle air conditioner X and charge the battery E1 when the vehicle is parked and the battery E1 is low. The power supply switching module is used to determine whether the battery E1 has sufficient power by detecting the voltage of the battery E1. When the battery is determined to be sufficient, the battery power supply module is controlled to supply power; when the battery is determined to be insufficient, the generator power supply module is controlled to supply power. After the first delay, the battery power supply module is controlled to stop supplying power, and after the second delay, the generator power supply module is controlled to charge the battery E1. The first delay time is shorter than the second delay time. The output terminal of the battery power supply module is connected to the first input terminal of the power supply switching module (at the eighth resistor R8), the first output terminal of the generator power supply module is connected to the first input terminal of the battery power supply module (at the second resistor R2), the first output terminal of the power supply switching module is connected to the second input terminal of the battery power supply module (common point A1), the second output terminal of the power supply switching module is connected to the first input terminal of the generator power supply module (common point A2), and the third output terminal of the power supply switching module is connected to the second input terminal of the generator power supply module (at the fifth diode D5).
[0019] In this embodiment: Please refer to Figure 2 The battery power supply module includes a first capacitor C1, a sixth diode D6, a second transistor V2, a battery E1, a seventh resistor R7, and an eighth resistor R8. The negative terminal of the battery E1 is grounded, the positive terminal of the battery E1 is connected to the collector of the second transistor V2, one end of the seventh resistor R7, the other end of the seventh resistor R7 is connected to one end of the eighth resistor R8, the first input terminal of the power supply switching module, the other end of the eighth resistor R8 is grounded, the base of the second transistor V2 is connected to the first output terminal of the power supply switching module, the emitter of the second transistor V2 is connected to the anode of the sixth diode D6, the negative terminal of the sixth diode D6 is connected to one end of the first capacitor C1 and the vehicle air conditioner X, and the other end of the first capacitor C1 is grounded.
[0020] When the vehicle is parked, the battery E1 is fully charged. At this time, the common point A1 is at a high level. The battery E1 supplies power to the vehicle air conditioner X through the second transistor V2, the sixth diode D6, and the first capacitor C1, and the vehicle air conditioner X works.
[0021] In another embodiment: the first capacitor C1 can be omitted. The first capacitor C1 is used to smoothly output the voltage to the vehicle air conditioner X and to keep the voltage stable during the switching of power supply between the battery power supply module and the generator power supply module.
[0022] In this embodiment: Please refer to Figure 2 The generator power supply module includes a first diode D1, a third diode D3, a first transistor V1, a second resistor R2, and a generator power supply circuit. The first terminal of the generator power supply circuit is connected to the negative terminal of the first diode D1, and the positive terminal of the first diode D1 is connected to the second output terminal of the power supply switching module. The second terminal of the generator power supply circuit is connected to the positive terminal of the third diode D3, and the negative terminal of the third diode D3 is connected to the vehicle air conditioner X. The collector of the first transistor V1 is connected to the base of the first transistor V1, and the third output terminal of the power supply switching module is connected to the third output terminal of the power supply switching module. The emitter of the first transistor V1 is connected to one end of the second resistor R2, and the other end of the second resistor R2 is connected to the first input terminal of the battery power supply module.
[0023] When the vehicle is in motion, the generator power supply circuit outputs voltage to power the vehicle air conditioner X (generator power supply is a common technology and will not be described in detail here). When the vehicle is parked and the battery E1 is low on power, the common point A2 is at a high level, which triggers the generator power supply circuit to work. The power is supplied to the vehicle air conditioner X through the third diode D3, and the battery E1 is charged through the first transistor V1 and the second resistor R2.
[0024] In another embodiment, an indicator light can be added to indicate which module is supplying power to the vehicle air conditioner X.
[0025] In this embodiment: Please refer to Figure 2 The power supply switching module includes: The battery power supply control unit is used to detect the voltage of battery E1 and obtain the sampling voltage (the voltage on the eighth resistor R8). When the sampling voltage is greater than the first reference voltage VREF1, the first voltage signal is output to construct the power supply circuit of the battery power supply module and the vehicle air conditioner X (the common point A1 is high level). The generator power supply control unit is used to output a second voltage signal to control the generator power supply module to work (common point A2 is high level) when the sampled voltage is lower than the second reference voltage VREF2, thus establishing a power supply circuit between the generator power supply module and the vehicle air conditioner X. After the first delay (when the third capacitor C3 is charging), it controls the battery power supply control unit to stop outputting the first voltage signal; after the second delay (when the second capacitor C2 is charging), it controls the generator power supply module to supply power to the battery E1. The first delay time is shorter than the second delay time; the first reference voltage VREF1 is less than the second reference voltage VREF2. The power supply unit is used to determine that the battery E1 is fully charged when the amplified voltage corresponding to the charging current of the battery E1 is less than the third reference voltage VREF3 and the sampled voltage is greater than the fourth reference voltage VREF4. It then controls the generator power supply control unit to stop outputting the second voltage signal and restores the power supply circuit of the battery power supply module and the vehicle air conditioner X. The first input terminal of the battery power supply control unit is connected to the output terminal of the battery power supply module, the first input terminal of the generator power supply control unit, and the first input terminal of the power restoration unit (at the eighth resistor R8). The output terminal of the battery power supply control unit is connected to the second input terminal of the battery power supply module (common point A1). The second input terminal of the battery power supply control unit is connected to the second output terminal of the generator power supply control unit (common point A5). The first output terminal of the generator power supply control unit is connected to the first input terminal of the generator power supply module (common point A2). The third output terminal of the generator power supply control unit is connected to the second input terminal of the generator power supply module (at the fifth diode D5). The second input terminal of the power restoration unit is connected to the first output terminal of the generator power supply module (at the second resistor R2). The output terminal of the power restoration unit is connected to the second input terminal of the generator power supply control unit (the gate of the fourth MOSFET V4).
[0026] In this embodiment: Please refer to Figure 2 The battery power supply control unit includes a first amplifier U1, a fifth MOSFET V5, and a ninth diode D9. The non-inverting input of the first amplifier U1 is connected to the output terminal of the battery power supply module, the inverting input of the first amplifier U1 is connected to the first reference voltage VREF1, the output terminal of the first amplifier U1 is connected to the source (S) terminal of the fifth MOSFET V5, the drain (D) terminal of the fifth MOSFET V5 is connected to the second input terminal of the battery power supply module, the gate (G) terminal of the fifth MOSFET V5 is connected to the positive terminal of the ninth diode D9, and the negative terminal of the ninth diode D9 is connected to the second output terminal of the generator power supply control unit.
[0027] The voltage across the eighth resistor R8 is the sampling voltage of battery E1. When the sampling voltage is greater than the first reference voltage VREF1, battery E1 can supply power, and the first amplifier U1 outputs a high level, which, through the fifth MOSFET V5, makes the common point A1 high. As battery E1 discharges, the sampling voltage will become less than the first reference voltage VREF1. At this time, the first amplifier U1 outputs a low level, the common point A1 is low, the second transistor V2 is disconnected, and battery E1 does not discharge, thus avoiding over-discharge.
[0028] In another embodiment, the fifth MOSFET V5 can be replaced with another type of switching transistor.
[0029] In this embodiment: Please refer to Figure 2The generator power supply control unit includes a second amplifier U2, a fourth MOSFET V4, a seventh diode D7, a tenth resistor R10, a third capacitor C3, an eighth diode D8, a fourth diode D4, a first resistor R1, a second capacitor C2, and a fifth diode D5. The inverting input of the second amplifier U2 is connected to the output of the battery power supply module, and the non-inverting input of the second amplifier U2 is connected to the second reference voltage VREF2. The output of the second amplifier U2 is connected to the source (S) terminal of the fourth MOSFET V4. The gate (G) terminal of the fourth MOSFET V4 is connected to the output of the recovery power supply unit, and the drain (D) terminal of the fourth MOSFET V4 is connected to the positive terminal of the seventh diode D7. The first input terminal of the generator power supply module, the positive terminal of the fourth diode D4, and the negative terminal of the seventh diode D7 are connected to one end of the tenth resistor R10. The other end of the tenth resistor R10 is connected to one end of the third capacitor C3 and the positive terminal of the eighth diode D8. The other end of the third capacitor C3 is grounded. The negative terminal of the eighth diode D8 is connected to the second input terminal of the battery power supply control unit. The negative terminal of the fourth diode D4 is connected to one end of the first resistor R1. The other end of the first resistor R1 is connected to one end of the second capacitor C2 and the negative terminal of the fifth diode D5. The other end of the second capacitor C2 is grounded. The positive terminal of the fifth diode D5 is connected to the second input terminal of the generator power supply module.
[0030] During the discharge of battery E1, the sampling voltage may be lower than the second reference voltage VREF2. At this time, the second amplifier U2 outputs a high level, which, through the fourth MOSFET V4, makes the common point A2 high, triggering the generator power supply module to supply power. At the same time, the third capacitor C3 is charged through the seventh diode D7 and the tenth resistor R10. When the voltage of the third capacitor C3 after charging passes through the eighth diode D8 and can conduct the ninth diode D9 (Zenyl regulator diode), the fifth MOSFET V5 will be disconnected, making the common point A1 low, and the battery E1 will stop supplying power. The high level of the common point A2 will also charge the second capacitor C2 through the fourth diode D4 and the first resistor R1. When the voltage of the second capacitor C2 after charging can conduct the fifth diode D5 (Zenyl regulator diode), the first transistor V1 will be turned on to charge the battery E1. The first delay time (charging of the third capacitor C3) is shorter than the second delay time (charging of the second capacitor C2); the first reference voltage VREF1 is less than the second reference voltage VREF2; that is, it ensures that the process of changing from battery E1 power supply to generator power supply is as follows: battery E1 supplies power to vehicle air conditioner X - battery E1 and generator jointly supply power to vehicle air conditioner X - generator supplies power to vehicle air conditioner X - generator supplies power to vehicle air conditioner X while simultaneously supplying power to battery E1, ensuring voltage stability in the two processes of battery E1 changing to generator supplying power to vehicle air conditioner X, and generator supplying power to vehicle air conditioner X while simultaneously supplying power to battery E1.
[0031] In another embodiment, the tenth resistor R10 can be replaced with a potentiometer to facilitate the charging time of the third capacitor C3.
[0032] In this embodiment: Please refer to Figure 2 The power restoration unit includes a fourth amplifier U4, a ninth resistor R9, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a fifth amplifier U5, a third amplifier U3, and a third MOSFET V3. The drain (D) terminal of the third MOSFET V3 is connected to the output terminal of the battery power supply module, and the source (S) terminal of the third MOSFET V3 is connected to the non-inverting input of the fourth amplifier U4. The inverting input of the fourth amplifier U4 is connected to the fourth reference voltage VREF4. The output terminal of the fourth amplifier U4 is connected to one end of the ninth resistor R9, and the other end of the ninth resistor R9 is connected to the second input terminal of the generator power supply control unit. The third MOSFET V... The source (S) terminal of resistor 3 is connected to the output terminal of the third amplifier U3. The non-inverting input of the third amplifier U3 is connected to the third reference voltage VREF3. The inverting input of the third amplifier U3 is connected to the output terminal of the fifth amplifier U5 and one end of the sixth resistor R6. The non-inverting input of the fifth amplifier U5 is connected to one end of the third resistor R3 and one end of the fourth resistor R4. The other end of the fourth resistor R4 is grounded. The other end of the third resistor R3 is connected to the first output terminal of the generator power supply module. The other end of the sixth resistor R6 is connected to one end of the fifth resistor R5 and the inverting input of the fifth amplifier U5. The other end of the fifth resistor R5 is connected to the first output terminal of the generator power supply module.
[0033] When battery E1 is fully charged, there is no current or very little current flowing through the second resistor R2. This results in a very small voltage output from the differential amplifier circuit constructed by the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, and the fifth amplifier U5. This voltage is lower than the third reference voltage VREF3, causing the third amplifier U3 to output a high level and triggering the third MOSFET V3 to conduct. At this time, the sampling voltage of battery E1 is monitored to see if it is higher than the fourth reference voltage VREF4. If it is higher, after two processes of current judgment and voltage judgment, it is determined that battery E1 is fully charged, and the power supply is switched to battery E1. At this time, the gate of the fourth MOSFET V4 becomes high, the fourth MOSFET V4 is cut off, the common point A2 becomes low, the generator power supply module stops supplying power, the fifth MOSFET V5 conducts again, the common point A1 becomes high, the second transistor V2 conducts, and the battery power supply module resumes supplying power. If the sampled voltage of battery E1 is lower than the fourth reference voltage VREF4, battery E1 will not charge and the voltage will be low. This indicates a charging fault in battery E1. In order to ensure the car starts, the fourth MOSFET V4 will remain on to maintain the generator power supply.
[0034] In another embodiment: the first reference voltage VREF1, the second reference voltage VREF2, the third reference voltage VREF3, and the fourth reference voltage VREF4 are obtained by a fixed voltage divider.
[0035] In this embodiment: Please refer to Figure 1 The dual-purpose vehicle air conditioning power supply coordination control system for driving and parking also includes: a fault detection and processing module, used to monitor whether the second voltage signal (high level of common point A2) successfully controls the generator power supply module to work. If it fails, it outputs another voltage signal (high level of common point A4) to control the generator power supply module to work. If the generator power supply module fails to start working after the third delay, it controls the battery power supply module to stop supplying power to the vehicle air conditioning X to avoid the battery E1 being over-discharged and unable to start the vehicle. The first input terminal of the fault detection and processing module is connected to the second output terminal of the power supply switching module (common point A2), the second input terminal of the fault detection and processing module is connected to the second output terminal of the generator power supply module (common point A3), the first output terminal of the fault detection and processing module is connected to the third input terminal of the generator power supply module (common point A4), and the second output terminal of the fault detection and processing module is connected to the second input terminal of the battery power supply control unit (common point A5).
[0036] In this embodiment: Please refer to Figure 3 The fault detection and processing module includes a tenth diode D10, an eleventh diode D11, an XOR gate U6, an eleventh resistor R11, a fourth capacitor C4, and a twelfth diode D12. The positive terminal of the tenth diode D10 is connected to the second output terminal of the generator power supply module, and the negative terminal of the tenth diode D10 is connected to one end of the input terminal of the XOR gate U6. The positive terminal of the eleventh diode D11 is connected to the second output terminal of the power supply switching module, and the negative terminal of the eleventh diode D11 is connected to the other end of the input terminal of the XOR gate U6. The output terminal of the XOR gate U6 is connected to one end of the eleventh resistor R11 and the third input terminal of the generator power supply module. The other end of the eleventh resistor R11 is connected to one end of the fourth capacitor C4 and the positive terminal of the twelfth diode D12. The other end of the fourth capacitor C4 is grounded, and the negative terminal of the twelfth diode D12 is connected to the second input terminal of the battery power supply control unit.
[0037] After the common point A2 is high (continuously triggered), the generator power supply circuit is controlled to work under normal conditions, so that the common point A3 is high to provide power. In case of starting failure or other situations, if the common point A2 is high, the common point A1 is low, but the common point A3 is low, the vehicle air conditioner X has no power input and does not work. Therefore, a fault detection and processing module is designed.
[0038] When common point A2 is high and common point A3 is low, the XOR gate U6 outputs a high level, and common point A4 is high (point-controlled trigger), triggering the generator power supply circuit to operate. If operating normally, common point A3 becomes high and common point A4 becomes low, without charging the fourth capacitor C4. If common point A3 remains low, common point A4 remains high, charging the fourth capacitor C4 (third delay) until the voltage on the fourth capacitor C4 is sufficient to conduct the ninth diode D9, triggering the fifth MOSFET V5 to turn off, and common point A1 becomes low. The third delay time must be much shorter than the first delay time to disconnect the power supply circuit to battery E1 as quickly as possible if the generator power supply circuit fails to start automatically, thus preserving the battery E1's charge. Specifically, battery E1 retains the most charge when the fourth capacitor C4 triggers common point A5 to be high, a moderate amount of charge when the third capacitor C3 triggers common point A5 to be high, and the least charge when the first amplifier outputs a low level.
[0039] In another embodiment: Here, the generator power supply circuit is controlled by signals from common point A2 and common point A4. Alternatively, the signals can be input to the vehicle's control chip, which then controls the generator power supply circuit.
[0040] The working principle of this invention is as follows: the battery power supply module supplies power to the vehicle air conditioner X when the vehicle is parked and the battery E1 has sufficient charge; the generator power supply module supplies power to the vehicle air conditioner X while the vehicle is in motion, supplies power to the vehicle air conditioner X when the vehicle is parked and the battery E1 has insufficient charge, and charges the battery E1; the power supply switching module determines whether the battery E1 has sufficient charge by detecting the voltage of the battery E1. When the battery E1 is determined to have sufficient charge, the module controls the battery power supply module to supply power; when the battery E1 is determined to have insufficient charge, the module controls the generator power supply module to supply power. After a first delay, the module controls the battery power supply module to stop supplying power, and after a second delay, the module controls the generator power supply module to charge the battery E1. The first delay is shorter than the second delay.
[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.
[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A vehicle-mounted air conditioning power supply coordination control system for both driving and parking, characterized in that, The vehicle-mounted air conditioning power supply coordination control system for both driving and parking includes: The battery power supply module is used to supply power to the vehicle's air conditioning when the vehicle is parked and the battery has sufficient charge. The generator power supply module is used to power the vehicle's air conditioning when the vehicle is in motion, and to power the vehicle's air conditioning and charge the battery when the vehicle is parked and the battery is low. The power supply switching module is used to determine whether the battery has sufficient power by detecting the battery voltage. When the battery has sufficient power, it controls the battery power supply module to supply power; when the battery has insufficient power, it controls the generator power supply module to supply power. After the first delay, it controls the battery power supply module to stop supplying power, and after the second delay, it controls the generator power supply module to charge the battery. The first delay is shorter than the second delay. The output terminal of the battery power supply module is connected to the first input terminal of the power supply switching module, the first output terminal of the generator power supply module is connected to the first input terminal of the battery power supply module, the first output terminal of the power supply switching module is connected to the second input terminal of the battery power supply module, the second output terminal of the power supply switching module is connected to the first input terminal of the generator power supply module, and the third output terminal of the power supply switching module is connected to the second input terminal of the generator power supply module.
2. The dual-purpose vehicle air conditioning power supply coordination control system for driving and parking as described in claim 1, characterized in that, The battery power supply module includes a first capacitor, a sixth diode, a second transistor, a battery, a seventh resistor, and an eighth resistor. The negative terminal of the battery is grounded, the positive terminal of the battery is connected to the collector of the second transistor, one end of the seventh resistor, the other end of the seventh resistor is connected to one end of the eighth resistor, the first input terminal of the power supply switching module, the other end of the eighth resistor is grounded, the base of the second transistor is connected to the first output terminal of the power supply switching module, the emitter of the second transistor is connected to the anode of the sixth diode, the cathode of the sixth diode is connected to one end of the first capacitor, the vehicle air conditioner, and the other end of the first capacitor is grounded.
3. The dual-purpose vehicle air conditioning power supply coordination control system for driving and parking as described in claim 1, characterized in that, The generator power supply module includes a first diode, a third diode, a first transistor, a second resistor, and a generator power supply circuit. The first terminal of the generator power supply circuit is connected to the negative terminal of the first diode, and the positive terminal of the first diode is connected to the second output terminal of the power supply switching module. The second terminal of the generator power supply circuit is connected to the positive terminal of the third diode, and the negative terminal of the third diode is connected to the vehicle air conditioner. The collector of the first transistor is connected to the base of the first transistor, and the third output terminal of the power supply switching module is connected to the emitter of the first transistor. One end of the second resistor is connected to the emitter of the first transistor, and the other end of the second resistor is connected to the first input terminal of the battery power supply module.
4. The dual-purpose vehicle air conditioning power supply coordination control system for driving and parking as described in claim 1, characterized in that, The power supply switching module includes: The battery power supply control unit is used to detect the battery voltage, obtain the sampled voltage, and output the first voltage signal when the sampled voltage is greater than the first reference voltage to construct the power supply circuit for the battery power supply module and the vehicle air conditioner. The generator power supply control unit is used to output a second voltage signal to control the generator power supply module to work when the sampled voltage is lower than the second reference voltage, to establish a power supply circuit between the generator power supply module and the vehicle air conditioner, and to control the battery power supply control unit to stop outputting the first voltage signal after the first delay; and to control the generator power supply module to supply power to the battery after the second delay; the first delay time is shorter than the second delay time; and the first reference voltage is lower than the second reference voltage. The power supply unit is used to determine that the battery charging is complete when the amplified voltage corresponding to the battery charging current is less than the third reference voltage and the sampled voltage is greater than the fourth reference voltage. It then controls the generator power supply control unit to stop outputting the second voltage signal and restores the power supply circuit of the battery power supply module and the vehicle air conditioner. The first input terminal of the battery power supply control unit is connected to the output terminal of the battery power supply module, the first input terminal of the generator power supply control unit, and the first input terminal of the power restoration unit. The output terminal of the battery power supply control unit is connected to the second input terminal of the battery power supply module. The second input terminal of the battery power supply control unit is connected to the second output terminal of the generator power supply control unit. The first output terminal of the generator power supply control unit is connected to the first input terminal of the generator power supply module. The third output terminal of the generator power supply control unit is connected to the second input terminal of the generator power supply module. The second input terminal of the power restoration unit is connected to the first output terminal of the generator power supply module. The output terminal of the power restoration unit is connected to the second input terminal of the generator power supply control unit.
5. The dual-purpose vehicle air conditioning power supply coordination control system for driving and parking as described in claim 4, characterized in that, The battery power supply control unit includes a first amplifier, a fifth MOSFET, and a ninth diode. The non-inverting input of the first amplifier is connected to the output of the battery power supply module, the inverting input of the first amplifier is connected to a first reference voltage, the output of the first amplifier is connected to the source (S) terminal of the fifth MOSFET, the drain (D) terminal of the fifth MOSFET is connected to the second input terminal of the battery power supply module, the gate (G) terminal of the fifth MOSFET is connected to the anode of the ninth diode, and the cathode of the ninth diode is connected to the second output terminal of the generator power supply control unit.
6. The dual-purpose vehicle air conditioning power supply coordination control system for driving and parking as described in claim 4, characterized in that, The generator power supply control unit includes a second amplifier, a fourth MOSFET, a seventh diode, a tenth resistor, a third capacitor, an eighth diode, a fourth diode, a first resistor, a second capacitor, and a fifth diode. The inverting input of the second amplifier is connected to the output of the battery power supply module, and the non-inverting input is connected to the second reference voltage. The output of the second amplifier is connected to the source (S) terminal of the fourth MOSFET. The gate (G) terminal of the fourth MOSFET is connected to the output of the recovery power supply unit. The drain (D) terminal of the fourth MOSFET is connected to the anode of the seventh diode, the first input terminal of the generator power supply module, and the anode of the fourth diode. The cathode of the seventh diode is connected to one end of the tenth resistor. The other end of the tenth resistor is connected to one end of the third capacitor and the anode of the eighth diode. The other end of the third capacitor is grounded. The cathode of the eighth diode is connected to the second input terminal of the battery power supply control unit. The cathode of the fourth diode is connected to one end of the first resistor. The other end of the first resistor is connected to one end of the second capacitor and the cathode of the fifth diode. The other end of the second capacitor is grounded. The anode of the fifth diode is connected to the second input terminal of the generator power supply module.
7. The dual-purpose vehicle air conditioning power supply coordination control system for driving and parking as described in claim 4, characterized in that, The power restoration unit includes a fourth amplifier, a ninth resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a fifth amplifier, a third amplifier, and a third MOSFET. The drain (D) of the third MOSFET is connected to the output terminal of the battery power supply module. The source (S) of the third MOSFET is connected to the non-inverting input of the fourth amplifier. The inverting input of the fourth amplifier is connected to the fourth reference voltage. The output terminal of the fourth amplifier is connected to one end of the ninth resistor. The other end of the ninth resistor is connected to the second input terminal of the generator power supply control unit. The source (S) of the third MOSFET is connected to the output terminal of the third amplifier. The non-inverting input of the third amplifier is connected to the third reference voltage. The inverting input of the third amplifier is connected to the output terminal of the fifth amplifier and one end of the sixth resistor. The non-inverting input of the fifth amplifier is connected to one end of the third resistor and one end of the fourth resistor. The other end of the fourth resistor is grounded. The other end of the third resistor is connected to the first output terminal of the generator power supply module. The other end of the sixth resistor is connected to one end of the fifth resistor and the inverting input of the fifth amplifier. The other end of the fifth resistor is connected to the first output terminal of the generator power supply module.
8. The dual-purpose vehicle air conditioning power supply coordination control system according to any one of claims 4 to 7, characterized in that, The dual-purpose vehicle air conditioning power supply coordination control system for driving and parking also includes: a fault detection and processing module, which monitors whether the second voltage signal successfully controls the generator power supply module to work. If it fails, it outputs another voltage signal to control the generator power supply module to work. If the generator power supply module fails to start working after the third delay, it controls the battery power supply module to stop supplying power to the vehicle air conditioning to avoid the battery being over-discharged and unable to start the vehicle. The first input terminal of the fault detection and processing module is connected to the second output terminal of the power supply switching module, the second input terminal of the fault detection and processing module is connected to the second output terminal of the generator power supply module, the first output terminal of the fault detection and processing module is connected to the third input terminal of the generator power supply module, and the second output terminal of the fault detection and processing module is connected to the second input terminal of the battery power supply control unit.
9. The dual-purpose vehicle air conditioning power supply coordination control system for driving and parking as described in claim 8, characterized in that, The fault detection and processing module includes a tenth diode, an eleventh diode, an XOR gate, an eleventh resistor, a fourth capacitor, and a twelfth diode. The positive terminal of the tenth diode is connected to the second output terminal of the generator power supply module, and the negative terminal of the tenth diode is connected to one input terminal of the XOR gate. The positive terminal of the eleventh diode is connected to the second output terminal of the power supply switching module, and the negative terminal of the eleventh diode is connected to the other input terminal of the XOR gate. The output terminal of the XOR gate is connected to one end of the eleventh resistor and the third input terminal of the generator power supply module. The other end of the eleventh resistor is connected to one end of the fourth capacitor and the positive terminal of the twelfth diode. The other end of the fourth capacitor is grounded, and the negative terminal of the twelfth diode is connected to the second input terminal of the battery power supply control unit.