CN114421587A - Standby power supply, vehicle and control method of vehicle - Google Patents
Standby power supply, vehicle and control method of vehicle Download PDFInfo
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- CN114421587A CN114421587A CN202111662539.XA CN202111662539A CN114421587A CN 114421587 A CN114421587 A CN 114421587A CN 202111662539 A CN202111662539 A CN 202111662539A CN 114421587 A CN114421587 A CN 114421587A
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- vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
Abstract
The invention relates to a standby power supply, a vehicle and a control method of the vehicle, wherein the standby power supply comprises: a high voltage direct current power supply and a first DC-DC converter; the high-voltage input end of the first DC-DC converter is electrically connected with the output end of the high-voltage direct-current power supply, and the low-voltage output end of the first DC-DC converter is electrically connected with a vehicle low-voltage wiring harness of the vehicle; the vehicle low-voltage wiring harness is electrically connected with a second DC-DC converter, a battery management system and a vehicle control unit of the vehicle. According to the embodiment of the invention, the first DC-DC converter drives the second DC-DC converter at the vehicle end, and under the condition that the low-voltage storage battery V2 is in a power shortage state, a standby power supply is provided for the second DC-DC converter, the battery management system BMS and the vehicle control unit VCU on the vehicle, so that the normal starting of the vehicle is ensured.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a standby power supply, a vehicle and a control method of the vehicle.
Background
Electric energy is a clean energy and is widely applied to various fields. The new energy automobile industry is rapidly developed under the vigorous promotion of governments, and the motor gradually replaces a traditional fuel engine and becomes one of three core components of the new energy electric automobile. As an energy source of an electric automobile, an on-board power storage battery system is extremely important and is one of the key factors for normal running of the automobile. However, no matter the driving system, the battery management system or the vehicle controller, the 24V low-voltage storage battery is used for supplying working power, and the key is used for controlling the wake-up signal. Therefore, the vehicle with lower use frequency in the market is lack of maintenance of the low-voltage storage battery due to long-term parking, so that the power shortage of the low-voltage storage battery is caused, and when the vehicle runs again, each control module of the whole vehicle cannot be started because the low-voltage storage battery is under voltage.
Therefore, for vehicles which are parked for a long time and are not maintained or vehicles which are seriously short of power due to the sudden power shortage of the low-voltage storage battery, the traditional mode is that a 'cross river dragon' is used, and another vehicle or the low-voltage storage battery is used for implementing power transfer to help the vehicles which are short of power of the low-voltage storage battery to start. Therefore, an emergency standby power supply is needed to ensure that the vehicle is safely and normally powered by the low-voltage storage battery under the condition of undervoltage, so that the influence on the operation of the vehicle is prevented.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the invention provides a standby power supply, a vehicle and a control method of the vehicle.
In a first aspect, the present invention provides a backup power supply comprising: a high voltage direct current power supply and a first DC-DC converter;
the high-voltage input end of the first DC-DC converter is electrically connected with the output end of the high-voltage direct-current power supply, and the low-voltage output end of the first DC-DC converter is electrically connected with a vehicle low-voltage wiring harness of the vehicle;
the vehicle low-voltage wiring harness is electrically connected with a second DC-DC converter, a battery management system and a vehicle control unit of the vehicle.
Optionally, the method further comprises: a control switch;
the control switch is arranged on a line where the high-voltage input end of the first DC-DC converter is electrically connected with the output end of the high-voltage direct-current power supply.
Optionally, the method further comprises: a first diode and a second diode;
the negative electrode of the first diode is electrically connected with the negative connecting terminal of the low-voltage output end of the first DC-DC converter, and the positive electrode of the first diode is electrically connected with the negative wiring harness of the low-voltage wiring harness of the vehicle;
and the anode of the second diode is electrically connected with the positive connecting terminal of the low-voltage output end of the first DC-DC converter, and the cathode of the second diode is electrically connected with the anode wiring harness of the low-voltage wiring harness of the vehicle.
In a second aspect, the present invention provides a vehicle comprising: a second DC-DC converter and a backup power supply as described in the first aspect;
the low-voltage input end of the second DC-DC converter is electrically connected with the low-voltage wire harness of the vehicle, the high-voltage input end of the second DC-DC converter is electrically connected with the high-voltage direct-current power supply, and the low-voltage output end of the second DC-DC converter is electrically connected with a discharge loop of a power supply of the whole vehicle.
Optionally, the method further comprises: a battery main discharge contactor;
the battery main discharge contactor is arranged on a line where the high-voltage input end of the second DC-DC converter is electrically connected with the high-voltage direct-current power supply.
Optionally, the method further comprises: the system comprises a vehicle controller, a battery management system and a vehicle low-voltage load;
the vehicle control unit is respectively electrically connected with the vehicle low-voltage wiring harness and the vehicle power supply discharging loop;
the battery management system is electrically connected with the vehicle low-voltage wiring harness;
and the whole vehicle low-voltage load is electrically connected with the whole vehicle power supply discharging loop.
Optionally, the method further comprises: a third diode;
and the anode of the third diode is electrically connected with the anode line of the finished automobile power supply discharging loop, and the cathode of the third diode is electrically connected with the finished automobile controller.
In a third aspect, the present invention provides a control method for a vehicle, which is applied to the vehicle according to the second aspect, and includes:
switching on a control switch;
the first DC-DC converter converts a high voltage output by the high-voltage direct-current power supply into a first low voltage;
and the second DC-DC converter and the vehicle control unit are connected to the first low voltage on the low-voltage wire harness of the vehicle and used as a low-voltage working power supply.
Optionally, the method further comprises:
the vehicle control unit controls the connection of a battery main discharge contactor through a battery management system;
and the second DC-DC converter converts the high voltage output by the high-voltage direct-current power supply into a second low voltage and transmits the second low voltage to a discharge loop of a power supply of the whole vehicle.
Optionally, the method further comprises:
and when the low-voltage load of the whole vehicle is connected to the second low voltage of the discharging loop of the power supply of the whole vehicle, the control switch is switched off.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
according to the embodiment of the invention, the first DC-DC converter DCDC1 is adopted to generate the first low voltage, the first low voltage is transmitted to the second DC-DC converter DCDC2, the battery management system BMS and the vehicle control unit VCU, the low-voltage working power supply is provided for the second DC-DC converter DCDC2, the battery management system BMS and the vehicle control unit VCU, and the second DC-DC converter DCDC2, the battery management system BMS and the vehicle control unit VCU at the vehicle control end are started through the first DC-DC converter DCDC 1. Therefore, when the low-voltage storage battery V2 is in short supply, a standby power supply is provided for the second DC-DC converter DCDC2, the battery management system BMS and the vehicle control unit VCU on the vehicle, and normal starting of the vehicle is guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic diagram of an electrical principle of a vehicle according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
For vehicles which are parked for a long time and are not maintained or vehicles which are seriously short of power due to sudden power loss of a low-voltage storage battery, the traditional mode is that a 'cross river dragon' is used, and another trolley or the low-voltage storage battery is used for implementing power transfer to help the vehicles which are short of power of the low-voltage storage battery to start. Therefore, an emergency standby power supply is needed to ensure that the vehicle is safely and normally powered by the low-voltage storage battery under the condition of undervoltage, so that the influence on the operation of the vehicle is prevented. Therefore, the embodiment of the invention provides a standby power supply, a vehicle and a control method of the vehicle, which can be used by an operator in an emergency, so that the low-voltage lead-acid storage of the whole vehicle can be safely, effectively and normally started under the condition of power shortage due to long-term storage and non-maintenance of a battery, a series of influences caused by the fact that the vehicle cannot run are avoided, and manpower and material resources are saved.
As shown in fig. 1, the backup power supply includes: a high voltage direct current power supply V1 and a first DC-DC converter DCDC 1;
a high-voltage input end of the first DC-DC converter DCDC1 is electrically connected with an output end of the high-voltage direct-current power supply V1, and a low-voltage output end of the first DC-DC converter DCDC1 is electrically connected with a vehicle low-voltage wiring harness of the vehicle;
the vehicle low voltage harness is electrically connected with a second DC-DC converter DCDC2, a battery management system BMS, and a vehicle control unit VCU of the vehicle.
The first DC-DC converter DCDC1 has a smaller power than the second DC-DC converter DCDC2, and the first DC-DC converter DCDC1 has a smaller power, so the backup power source can be used only by the second DC-DC converter DCDC2, the battery management system BMS, and the vehicle control unit VCU.
The first DC-DC converter DCDC1 is used to convert a high voltage output from the high voltage DC power source V1 into a first low voltage, and the vehicle low voltage harness is used to transmit the first low voltage output from the low voltage output terminal of the first DC-DC converter DCDC1 to the second DC-DC converter DCDC2, the battery management system BMS, and the vehicle control unit VCU.
According to the embodiment of the invention, the first DC-DC converter DCDC1 is adopted to generate the first low voltage, the first low voltage is transmitted to the second DC-DC converter DCDC2, the battery management system BMS and the vehicle control unit VCU, the low-voltage working power supply is provided for the second DC-DC converter DCDC2, the battery management system BMS and the vehicle control unit VCU, and the second DC-DC converter DCDC2, the battery management system BMS and the vehicle control unit VCU at the vehicle control end are started through the first DC-DC converter DCDC 1. Therefore, when the low-voltage storage battery V2 is in short supply, a standby power supply is provided for the second DC-DC converter DCDC2, the battery management system BMS and the vehicle control unit VCU on the vehicle, and normal starting of the vehicle is guaranteed.
In yet another embodiment of the present invention, the backup power supply further comprises: a control switch S2;
the control switch S2 is disposed on a line where the high voltage input terminal of the first DC-DC converter DCDC1 is electrically connected to the output terminal of the high voltage DC power supply V1.
For example, a control switch S2 may be disposed on the positive wire harness in the connection line between the first DC-DC converter DCDC1 and the high voltage DC power source V1, and the control switch S2 is used to connect or disconnect the electrical connection between the first DC-DC converter DCDC1 and the high voltage DC power source V1.
In yet another embodiment of the present invention, the backup power supply further comprises: a first diode D1 and a second diode D2;
a cathode of the first diode D1 is electrically connected with a negative connection terminal of a low voltage output terminal of the first DC-DC converter DCDC1, and an anode of the first diode D1 is electrically connected with a cathode harness of the vehicle low voltage harness; among them, the first diode D1 is used to restrict the current direction from flowing only from the negative pole harness of the low voltage harness of the vehicle to the first DC-DC converter DCDC 1.
An anode of the second diode D2 is electrically connected to a positive connection terminal of the low voltage output terminal of the first DC-DC converter DCDC1, and a cathode of the second diode D2 is electrically connected to a positive electrode harness of the vehicle low voltage harness. Among them, the second diode D2 is used to limit the direction of current flow only from the first DC-DC converter DCDC1 to the positive wire harness of the vehicle low voltage wire harness.
The working principle of the standby power supply provided by the embodiment of the invention is as follows: a first DC-DC converter DCDC1 with small power is added at the end of a high-voltage direct current power supply V1, the first DC-DC converter DCDC1 is connected to a high-voltage loop of the high-voltage direct current power supply V1, and a control switch S2 is configured. When a vehicle operator is electrified for the first time, the low-voltage storage battery V2 is in power shortage, the control switch S2 is turned on under the condition that the low-voltage hand brake S1 switch is not turned off, the first DC-DC converter DCDC1 can perform voltage reduction on the high-voltage direct-current power supply V1 input by the high-voltage input end d, the high-voltage direct-current power supply V1 is converted into a first low-voltage V2 of about 25V, and the first low-voltage power supply is connected with a whole vehicle low-voltage wire harness through the end e, so that the emergency standby starting power supply of the vehicle is successfully connected.
In yet another embodiment of the present invention, there is also provided a vehicle comprising: a second DC-DC converter DCDC2 and a backup power supply as described in the previous embodiments;
the low-voltage input end of the second DC-DC converter DCDC2 is electrically connected with the low-voltage wiring harness of the vehicle, the high-voltage input end of the second DC-DC converter DCDC2 is electrically connected with the high-voltage direct current power supply V1, and the low-voltage output end of the second DC-DC converter DCDC2 is electrically connected with a discharge loop of a power supply of the whole vehicle.
The second DC-DC converter DCDC2 is connected with a low-voltage wire harness of the vehicle and used for accessing a first low voltage transmitted by the low-voltage wire harness of the vehicle, the first low voltage is used as a low-voltage working power supply to awaken the second DC-DC converter DCDC2 and provide the working power supply for the same, the second DC-DC converter DCDC2 converts a high voltage of the high-voltage direct-current power supply V1 into a second low voltage and transmits the second low voltage to a discharge loop of a power supply of the whole vehicle so as to be used by a VCU (vehicle control unit), a BMS (battery management system BMS) and other low-voltage loads 00 of the whole vehicle which are connected with the discharge loop of the power supply of the whole vehicle.
In yet another embodiment of the present invention, the vehicle further comprises: a battery main discharge contactor K1;
the main battery discharge contactor K1 is disposed on a line where the high voltage input terminal of the second DC-DC converter DCDC2 is electrically connected to the high voltage DC power source V1. For example, a battery main discharging contactor K1 may be provided on the positive electrode harness in the connection line of the second DC-DC converter DCDC2 and the high voltage DC power source V1, and the battery main discharging contactor K1 is used to make or break the electrical connection of the second DC-DC converter DCDC2 and the high voltage DC power source V1.
In yet another embodiment of the present invention, the vehicle further comprises: a vehicle control unit VCU, a battery management system BMS and other low-voltage loads 00 of the whole vehicle;
the vehicle control unit VCU is electrically connected with the vehicle low-voltage wiring harness and the vehicle power supply discharging loop respectively; the negative wire harness of the vehicle low-voltage wire harness and the negative wire of the finished vehicle power supply discharging circuit can be the same line, and illustratively, the positive connecting end of the finished vehicle controller VCU is electrically connected with the positive wire harness of the vehicle low-voltage wire harness and the positive wire harness of the finished vehicle power supply discharging circuit respectively;
the battery management system BMS is electrically connected with the vehicle low-voltage wiring harness, and the first DC-DC converter DCDC1 only provides low-voltage working power for the second DC-DC converter DCDC2, the vehicle control unit VCU and the battery management system BMS because the power of the first DC-DC converter DCDC1 is small;
the other low-voltage loads 00 of the whole vehicle are electrically connected with the discharging loop of the power supply of the whole vehicle, the power of the other low-voltage loads 00 of the whole vehicle is large, so that a second DC-DC converter DCDC2 with high power is needed to supply power for the other low-voltage loads 00 of the whole vehicle, and the other low-voltage loads 00 of the whole vehicle are electrically connected with the discharging loop of the power supply of the whole vehicle.
In yet another embodiment of the present invention, the vehicle further comprises: a third diode D3;
the anode of the third diode D3 is electrically connected to the anode line of the vehicle power supply discharge circuit, the cathode of the third diode D3 is electrically connected to the vehicle control unit VCU, and the third diode D3 is configured to limit the current direction from flowing to the vehicle control unit VCU only from the anode line of the vehicle power supply discharge circuit.
As shown in fig. 1, the cathode of the third diode D3 is connected to a circuit node, that is, a circuit node between the vehicle control unit VCU and the anode harness of the vehicle low-voltage harness, so that the current of the anode harness of the vehicle low-voltage harness can be prevented from flowing to the anode line of the vehicle power supply discharging circuit.
Based on the above, the internal working principle of the vehicle is as follows: under the action of a low-voltage working power supply serving as a wake-up signal, the vehicle control unit VCU and the battery management system BMS are subjected to self-checking power-up, then the battery management system BMS controls the battery main discharge contactor K1 to be closed under the instruction of the vehicle control unit VCU, a high-voltage loop of the second DC-DC converter DCDC2 at the vehicle end is connected from the end a, the second DC-DC converter DCDC2 at the vehicle end starts to work under the instruction of the vehicle control unit VCU, the high voltage of the high-voltage direct-current power supply V1 is converted into the second low voltage of 24V-27V and is output from the end b, so that the working power supply of the whole vehicle is normal, the low-voltage storage battery V2 starts to charge, and other low-voltage loads 00 and high-voltage components of the whole vehicle orderly work under the instruction of the vehicle control unit VCU and the like. The problem of when low voltage battery V2 is insufficient, can't start the vehicle is solved to guarantee whole car safety and normally start.
In still another embodiment of the present invention, there is also provided a control method of a vehicle, applied to the vehicle according to the foregoing embodiment, the method including:
turning on the control switch S2;
the first DC-DC converter DCDC1 converts a high voltage output by the high-voltage direct-current power supply V1 into a first low voltage;
the second DC-DC converter DCDC2 and the vehicle control unit VCU are connected to the first low voltage on the low-voltage wiring harness of the vehicle to serve as a low-voltage working power supply.
In yet another embodiment of the present invention, the method further comprises:
the VCU of the vehicle controller controls the connection of a main battery discharging contactor K1 through a BMS (battery management system);
and the second DC-DC converter DCDC2 converts the high voltage output by the high-voltage direct-current power supply V1 into a second low voltage and transmits the second low voltage to a discharge loop of a power supply of the whole vehicle.
In yet another embodiment of the present invention, the method further comprises:
and when other low-voltage loads 00 of the whole vehicle are connected to the second low voltage of the discharging loop of the power supply of the whole vehicle, the control switch S2 is switched off.
For the sake of understanding, the following detailed description is made of the principle of the control method of the vehicle with reference to fig. 1 and the practical application scenario:
the method comprises the following steps: the vehicle operator opens the low-voltage hand brake S1 (the initial state of the low-voltage hand brake S1 is open circuit), and the 24V low-voltage battery V2 is short of power, so that the working power supply voltage of the vehicle is insufficient and the vehicle cannot be started.
If the standby power supply exists, the starting cannot be carried out under the condition, and the step two is carried out;
step two: keeping the low-voltage hand brake S1 open, and then switching on the control switch S2;
after the control switch S2 is turned on, a high voltage loop (i.e., the high voltage DC power source V1) of the battery system is connected to the first DC-DC converter DCDC1 through the d-terminal, the first DC-DC converter DCDC1 automatically starts to operate, the voltage reduction process of the first DC-DC converter DCDC1 is performed, and then the basic low voltage operating power source and the key start wake-up signal ACC wake-up power source are provided to three main controller modules, namely, the vehicle controller VCU, the battery management system BMS and the second DC-DC converter DCDC2 through the e-terminal, after wake-up, the vehicle controller VCU, the battery management system BMS and the second DC-DC converter DCDC2 are self-checked for no fault, the vehicle controller VCU sends an instruction to close the battery main discharging contactor K1 to the battery management system BMS, the vehicle controller VCU detects that the battery main discharging contactor K1 is in a closed state, and sends an open operating mode to the second DC-DC converter DCDC2, and continuously outputting a 24V-27V low-voltage direct current working power supply to the whole vehicle through the b end.
The second DC-DC converter DCDC2 enters an operating state, and at this time, the operating power supplies of the vehicle control unit VCU, the battery management system BMS, and the second DC-DC converter DCDC2 are provided by the first DC-DC converter DCDC1 and the low-voltage battery V2 together, and the power supply line is specially processed, so that the two power supplies do not affect each other. When other low-voltage loads 00 of the whole vehicle start to work, the control switch S2 can be switched off, and other low-voltage loads and other high-voltage components on the whole vehicle start to work orderly under the instruction of the VCU.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A backup power supply, comprising: a high voltage direct current power supply and a first DC-DC converter;
the high-voltage input end of the first DC-DC converter is electrically connected with the output end of the high-voltage direct-current power supply, and the low-voltage output end of the first DC-DC converter is electrically connected with a vehicle low-voltage wiring harness of the vehicle;
the vehicle low-voltage wiring harness is electrically connected with a second DC-DC converter, a battery management system and a vehicle control unit of the vehicle.
2. The backup power supply of claim 1, further comprising: a control switch;
the control switch is arranged on a line where the high-voltage input end of the first DC-DC converter is electrically connected with the output end of the high-voltage direct-current power supply.
3. The backup power supply of claim 1, further comprising: a first diode and a second diode;
the negative electrode of the first diode is electrically connected with the negative connecting terminal of the low-voltage output end of the first DC-DC converter, and the positive electrode of the first diode is electrically connected with the negative wiring harness of the low-voltage wiring harness of the vehicle;
and the anode of the second diode is electrically connected with the positive connecting terminal of the low-voltage output end of the first DC-DC converter, and the cathode of the second diode is electrically connected with the anode wiring harness of the low-voltage wiring harness of the vehicle.
4. A vehicle, comprising: a second DC-DC converter and a backup power supply as claimed in claim 1 or 2;
the low-voltage input end of the second DC-DC converter is electrically connected with the low-voltage wire harness of the vehicle, the high-voltage input end of the second DC-DC converter is electrically connected with the high-voltage direct-current power supply, and the low-voltage output end of the second DC-DC converter is electrically connected with a discharge loop of a power supply of the whole vehicle.
5. The vehicle of claim 4, further comprising: a battery main discharge contactor;
the battery main discharge contactor is arranged on a line where the high-voltage input end of the second DC-DC converter is electrically connected with the high-voltage direct-current power supply.
6. The vehicle of claim 5, further comprising: the system comprises a vehicle controller, a battery management system and a vehicle low-voltage load;
the vehicle control unit is respectively electrically connected with the vehicle low-voltage wiring harness and the vehicle power supply discharging loop;
the battery management system is electrically connected with the vehicle low-voltage wiring harness;
and the whole vehicle low-voltage load is electrically connected with the whole vehicle power supply discharging loop.
7. The vehicle of claim 6, further comprising: a third diode;
and the anode of the third diode is electrically connected with the anode line of the finished automobile power supply discharging loop, and the cathode of the third diode is electrically connected with the finished automobile controller.
8. A control method for a vehicle, characterized in that, when applied to a vehicle according to any one of claims 5 to 6, the method comprises:
switching on a control switch;
the first DC-DC converter converts a high voltage output by the high-voltage direct-current power supply into a first low voltage;
and the second DC-DC converter and the vehicle control unit are connected to the first low voltage on the low-voltage wire harness of the vehicle and used as a low-voltage working power supply.
9. The control method of a vehicle according to claim 8, characterized in that the method further comprises:
the vehicle control unit controls the connection of a battery main discharge contactor through a battery management system;
and the second DC-DC converter converts the high voltage output by the high-voltage direct-current power supply into a second low voltage and transmits the second low voltage to a discharge loop of a power supply of the whole vehicle.
10. The control method of a vehicle according to claim 8, characterized in that the method further comprises:
and when the low-voltage load of the whole vehicle is connected to the second low voltage of the discharging loop of the power supply of the whole vehicle, the control switch is switched off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111662539.XA CN114421587A (en) | 2021-12-31 | 2021-12-31 | Standby power supply, vehicle and control method of vehicle |
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| CN202111662539.XA CN114421587A (en) | 2021-12-31 | 2021-12-31 | Standby power supply, vehicle and control method of vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3136614A1 (en) * | 2022-06-08 | 2023-12-15 | Yazaki Corporation | Energy supply system |
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2021
- 2021-12-31 CN CN202111662539.XA patent/CN114421587A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3136614A1 (en) * | 2022-06-08 | 2023-12-15 | Yazaki Corporation | Energy supply system |
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