CN213831347U - Low-voltage intelligent power supply system of hybrid electric vehicle - Google Patents
Low-voltage intelligent power supply system of hybrid electric vehicle Download PDFInfo
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- CN213831347U CN213831347U CN202022188388.6U CN202022188388U CN213831347U CN 213831347 U CN213831347 U CN 213831347U CN 202022188388 U CN202022188388 U CN 202022188388U CN 213831347 U CN213831347 U CN 213831347U
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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
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The utility model provides a hybrid vehicle low pressure intelligence power supply system can optimize hybrid vehicle's power supply system efficiency, reduces whole car energy consumption of traveling. The system comprises a high-voltage battery and a DCDC, wherein the high-voltage battery is connected with an input end of the DCDC, and the key point is that an output end of the DCDC is connected with a positive electrode and a negative electrode connected with a 12V storage battery through a low-voltage power supply bus and a connecting wire harness respectively, an electrical appliance load is connected to the low-voltage power supply bus in parallel, a control end of the DCDC is connected with a whole vehicle controller of the hybrid electric vehicle, a battery sensor is arranged between the positive electrode and the negative electrode of the 12V storage battery, and the battery sensor is in communication connection with the whole vehicle controller of the hybrid electric vehicle.
Description
Technical Field
The utility model relates to a hybrid vehicle technical field, concretely relates to hybrid vehicle low pressure intelligence power supply system.
Background
At present, a 12V power supply system on a common fuel oil automobile mainly comprises a generator and a storage battery, while on a hybrid electric automobile, DCDC replaces the generator and takes the tasks of supplying power to electric appliances of the whole automobile and charging the 12V storage battery.
The operating characteristics of DCDC are different from conventional generators. The traditional generator has larger difference of generating efficiency according to different rotating speeds of the engine, and the generated energy is smaller when idling. The efficiency of the DCDC is basically irrelevant to the working state of the engine, an ideal efficiency interval can be reached in a short time, and the DCDC has continuous high output capacity.
In the current power supply system of the hybrid electric vehicle, the DCDC converts high voltage electricity into 12V low voltage electricity to supply power for a storage battery and the whole vehicle. In the power supply process, the DCDC continuously works regardless of the electric quantity state of the 12V storage battery, and high-voltage energy is continuously consumed. There is a certain optimizable space in between.
Disclosure of Invention
The utility model aims at providing a hybrid vehicle low pressure intelligence power supply system can optimize hybrid vehicle's power supply system efficiency, reduces whole car energy consumption of traveling.
According to the utility model provides a hybrid vehicle low pressure intelligence power supply system, including high-voltage battery and DCDC, high-voltage battery with DCDC's input is connected, and the key lies in DCDC's output is connected with the positive negative pole that 12V battery is connected through low pressure power supply generating line and connecting harness respectively, it has electrical loads to connect on the low pressure power supply generating line, DCDC's control end and hybrid vehicle control unit are connected, be equipped with battery sensor between the positive negative pole of 12V battery, battery sensor and hybrid vehicle control unit communication are connected.
The working principle of the utility model is as follows: the DCDC plays the role of converting the high voltage of the high-voltage battery into 12V low voltage electricity, the high voltage electricity is used by an electric appliance load of the whole vehicle and charges the 12V storage battery, the battery sensor monitors the electric quantity of the 12V storage battery in real time and uploads the electric quantity information to the whole hybrid electric vehicle controller, the whole hybrid electric vehicle controller compares the received electric quantity information of the 12V storage battery with parameters in a control strategy, and the DCDC is switched on and off by combining parameters such as environment temperature, the running state of the whole vehicle and the working state of the DCDC, so that low-voltage intelligent power supply is realized.
Further, in order to avoid interference on the battery sensor, the battery sensor is installed on a negative pole pile head of the 12V storage battery, and a power line of the battery sensor is connected with a positive pole pile head of the 12V storage battery.
Preferably, the battery sensor is in communication connection with the whole hybrid electric vehicle controller through a LIN line.
Preferably, the DCDC is connected with a hybrid electric vehicle controller through a CAN line.
The utility model discloses following beneficial effect has:
1. and intelligent power supply is adopted, so that the running energy consumption of the whole vehicle can be reduced, and the emission can reach the standard.
2. The dynamic adjustment of the system can be realized according to different power supplies, and the flexibility is increased.
3. Under the working conditions of rapid acceleration and the like, the DCDC can be turned off to realize more efficient concentration of high-voltage energy.
Drawings
Fig. 1 is a schematic diagram of the structure of the working state of the DCDC device when the DCDC device is turned on.
Fig. 2 is a schematic diagram of the structure of the working state of the DCDC according to the present invention when the DCDC is turned off.
In which the figures are as follows: 1. a high voltage battery; 2. DCDC; 3. a low voltage power supply bus; 4. connecting a wire harness; 5. a 12V battery; 6. an electrical load; 7. a hybrid electric vehicle controller; 8. a battery sensor.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings, wherein the embodiments of the present invention are described in detail with reference to the accompanying drawings, for example, the shapes and structures of the respective members, the mutual positions and connection relationships between the respective portions, the functions and operation principles of the respective portions, and the like.
As fig. 1 and 2, the utility model discloses a hybrid vehicle low pressure intelligence power supply system, including high-voltage battery 1 and DCDC2, high-voltage battery 1 is connected with DCDC 2's input, DCDC 2's output is connected with the positive negative pole that connecting harness 4 and 12V battery 5 are connected through low pressure power supply bus 3 respectively, low pressure power supply bus 3 goes up and has connect electrical apparatus load 6, DCDC 2's control end is connected with hybrid vehicle controller 7, be equipped with battery sensor 8 between 12V battery 5's the positive negative pole, battery sensor 8 is connected with hybrid vehicle controller 7 communication.
The working principle of the utility model is as follows: the DCDC2 has the function of converting high voltage of the high-voltage battery 1 into 12V low voltage power for an electric load 6 of a finished automobile and charging the 12V storage battery 5, the battery sensor 8 monitors the electric quantity of the 12V storage battery 5 in real time and uploads the electric quantity information to the finished hybrid electric automobile controller 7, the finished hybrid electric automobile controller 7 compares the received electric quantity information of the 12V storage battery 5 with parameters in a control strategy, and the DCDC2 is switched on and off by combining parameters such as environment temperature, finished automobile running state and DCDC working state to realize low-voltage intelligent power supply, and when the DCDC2 is started, the DCDC2 supplies power to the electric load 6 of the finished automobile and charges the 12V storage battery 5 at the same time, as shown in FIG. 1; when the DCDC2 is turned off, the 12V battery 5 supplies power to the electrical loads 6 of the vehicle as shown in fig. 2. The high-voltage battery 1 is a power battery of a hybrid electric vehicle, and the high voltage is the voltage of the power battery and is generally more than 300V; the electric load 6 of the whole vehicle is generally connected with the negative electrode in a negative electrode bonding mode, which is a common technical means in the field and is not repeated in the figure; the control strategy of the hybrid electric vehicle controller 7 is as follows: the main core parameters of the control strategy are ambient temperature T, electric quantity SOC of the storage battery, an accelerator pedal position signal A, an air conditioner starting signal C and a headlamp starting signal L. Firstly, setting different optimal SOC of the electric quantity of the storage battery according to different environmental temperatures; examples are shown in table 1 below. The factors to be considered for the optimal SOC of the electric quantity of the storage battery are the type, the capacity, the target market, the typical behavior habits of customers and the like of the storage battery. At later calibration, the optimum SOC may be corrected as needed. And secondly, when the deviation between the monitored electric quantity of the storage battery and the optimal SOC is larger than 15% (calibration), if the whole vehicle starts high-voltage power supply, the DCDC2 is started to provide low-voltage electricity for the whole vehicle, and the 12V storage battery 5 is charged. After the 12V battery 5 reaches the optimum SOC, the DCDC2 stops outputting. Thirdly, the DCDC2 outputs continuously no matter how much the 12V battery 5 is charged: when the air conditioner turn-on signal C is true, when the headlight turn-on signal L is true. Finally, when the accelerator pedal position signal A >80%, the vehicle has a sudden acceleration request, at which time DCDC2 is turned off for a short period of time to allow a more focused supply of high voltage energy to the vehicle for acceleration.
| Ambient temperature deg.C | -20 | 0 | 30 |
| Optimum SOC% | 90 | 85 | 80 |
TABLE 1 ambient temperature and Battery optimal SOC example
In a preferred embodiment, in order to avoid interference with the battery sensor 8, the battery sensor 8 is mounted on the negative pole stub of the 12V battery 5, and the power supply line of the battery sensor 8 is connected to the positive pole stub of the 12V battery 5.
Preferably, the battery sensor 8 is in communication connection with the hybrid electric vehicle controller 7 through a LIN line.
Preferably, the DCDC2 is connected with the hybrid vehicle controller 7 through a CAN line.
The present invention has been described in detail with reference to the accompanying drawings, and it is apparent that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.
Claims (4)
1. The utility model provides a hybrid vehicle low pressure intelligence power supply system, includes high-voltage battery and DCDC, high-voltage battery with DCDC's input is connected, its characterized in that DCDC's output is connected with the positive negative pole that 12V battery is connected through low pressure power supply bus and connecting wire harness respectively, it has electrical load to connect in parallel on the low pressure power supply bus, DCDC's control end and hybrid vehicle control unit are connected, be equipped with battery sensor between the positive negative pole of 12V battery, battery sensor and hybrid vehicle control unit communication are connected.
2. The intelligent low-voltage power supply system for hybrid electric vehicles according to claim 1, wherein the battery sensor is mounted on the negative pole pile head of the 12V storage battery, and the power line of the battery sensor is connected with the positive pole pile head of the 12V storage battery.
3. The low-voltage intelligent power supply system of the hybrid electric vehicle as claimed in claim 2, wherein the battery sensor is in communication connection with the whole hybrid electric vehicle controller through a LIN line.
4. The low-voltage intelligent power supply system for hybrid electric vehicles according to claim 1, 2 or 3, wherein the DCDC is connected with the hybrid electric vehicle controller through a CAN line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022188388.6U CN213831347U (en) | 2020-09-29 | 2020-09-29 | Low-voltage intelligent power supply system of hybrid electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022188388.6U CN213831347U (en) | 2020-09-29 | 2020-09-29 | Low-voltage intelligent power supply system of hybrid electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN213831347U true CN213831347U (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022188388.6U Active CN213831347U (en) | 2020-09-29 | 2020-09-29 | Low-voltage intelligent power supply system of hybrid electric vehicle |
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| CN (1) | CN213831347U (en) |
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- 2020-09-29 CN CN202022188388.6U patent/CN213831347U/en active Active
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