CN210604925U - High-efficiency low-cost vehicle-mounted DCDC power supply aging equipment - Google Patents
High-efficiency low-cost vehicle-mounted DCDC power supply aging equipment Download PDFInfo
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- CN210604925U CN210604925U CN201921291538.7U CN201921291538U CN210604925U CN 210604925 U CN210604925 U CN 210604925U CN 201921291538 U CN201921291538 U CN 201921291538U CN 210604925 U CN210604925 U CN 210604925U
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Abstract
The utility model provides a high efficiency low cost vehicle DCDC power aging equipment, including the group battery that a plurality of low-voltage storage batteries are established ties and are formed, the positive negative pole of the group battery after establishing ties is connected to the input of the DCDC power of being surveyed and surveys, the output of every DCDC power of being surveyed is connected to each low-voltage storage battery; the ACDC power supply is connected with the alternating current commercial power at the input end and connected with the positive electrode and the negative electrode of the battery pack at the output end; the input of each backup DCDC power supply is connected with the positive and negative electrodes of the battery pack, and the output of each backup DCDC power supply is connected with each low-voltage storage battery; the input and the output of the tested DCDC power supply are provided with switches for disconnecting the connection between the tested DCDC and the battery; also comprises a set of monitoring system.
Description
Technical Field
The invention relates to a test aging device for a high-voltage to low-voltage isolation DCDC power supply.
Background
In recent years, with the development of electric vehicles, vehicle-mounted DCDC power supplies for converting a high voltage of a vehicle-mounted main battery to a low voltage have been rapidly developed. Because the on-board equipment has high requirements for reliability, the on-board equipment needs to be fully tested and aged in the production process.
Disclosure of Invention
1) Solves the technical problem
The invention provides a solution for the problems of long aging time, high energy consumption and the like of a high-voltage to low-voltage isolation DCDC power supply, and the solution has high efficiency and low manufacturing cost.
2) Technical scheme
The invention provides a high-efficiency low-cost vehicle-mounted DCDC power supply aging device which comprises a battery pack formed by connecting a plurality of low-voltage storage batteries in series, wherein the anode and the cathode of the battery pack after being connected in series are connected to the input side of a tested DCDC power supply, and the output of each tested DCDC power supply is connected to each low-voltage storage battery. The voltage of the low-voltage battery is generally selected to match the DCDC output voltage range. The number of series connected segments depends on the input voltage of the DCDC and is generally an integer around the input/output voltage. The DCDC power supply is in an isolated type, so that the input and the output are independent, the plurality of batteries are connected in series to supply power to the DCDC power supply, and the plurality of DCDCDCDCDCDCDC power supplies are output to each low-voltage storage battery to form closed-loop operation of energy. Because the efficiency of the DCDC is generally lower than 100%, an ACDC power supply is also needed, and the input of the ACDC power supply is connected with the alternating current commercial power and the output of the ACDC power supply is connected to the positive electrode and the negative electrode of the battery pack. Part of the energy lost to the efficiency of the DCDC is replenished by this power supply. The whole system operates efficiently, and the loss of the whole system is almost the efficiency loss of the DCDC. The electric energy consumed by aging is very little, a high-power supply is not required to be equipped, and the system cost is low.
This system has the drawback that several DCDCs must be simultaneously operated, which, if one of them is faulty or offline, causes the low-voltage accumulator whose output is connected to continue to consume electric energy without being replenished, resulting in a loss of electric power. In order to make up for the defect, the system also comprises a plurality of backup DCDC power supplies, wherein the input of each backup DCDC power supply is connected with the positive electrode and the negative electrode of the battery pack, and the output of each backup DCDC power supply is connected with each low-voltage storage battery. When a certain tested DCDC has a fault or is offline, the backup DCDC power supply replaces the tested power supply to maintain the operation of the whole system, thereby ensuring the flexibility of the system.
For protection and test, the input and output of the tested DCDC power supply are provided with switches for disconnecting the tested DCDC from the battery.
The whole system also comprises a set of monitoring system, and the monitoring system is connected with the anode and the cathode of each low-voltage storage battery and monitors the voltage of each low-voltage storage battery. The monitoring system also includes a set of current sensors that measure the input and output currents of each of the DCDCs. The device also comprises a set of temperature sensors for measuring the temperature of each DCDC and each low-voltage storage battery.
3) Advantageous effects
By adopting the aging scheme, the efficiency is very high, the system cost is low, and the flexibility of the system is also considered.
Drawings
Fig. 1 is an electrical schematic diagram of a high-efficiency low-cost vehicle-mounted DCDC power supply aging device, in which: 1-low-voltage storage battery, 2-tested DCDC power supply, 3-ACDC power supply, 4-backup DCDC power supply, 5-tested DCDC power supply output switch and 6-tested DCDC power supply input switch.
Detailed Description
The invention provides a high-efficiency low-cost vehicle-mounted DCDC power supply aging device which comprises a battery pack formed by connecting a plurality of low-voltage storage batteries [1] in series, wherein the positive electrode and the negative electrode of the battery pack after being connected in series are connected to the input side of a tested DCDC power supply [2], and the output of each tested DCDC power supply [2] is connected to each low-voltage storage battery [1 ]. The voltage of the low-voltage storage battery [1] is generally selected to be matched with the output voltage range of the DCDC power supply [2 ]. The number of series connected segments depends on the input voltage of the DCDC and is generally an integer around the input/output voltage. The DCDC power supply [2] is in an isolated type, so that the input and the output are independent, a plurality of batteries are connected in series to supply power to the DCDC power supply [2], and a plurality of DCDC power supplies [2] are output to each low-voltage storage battery to form closed-loop operation of energy. Because the efficiency of the DCDC is generally lower than 100%, an ACDC power supply [3] is also needed, wherein the input of the power supply [3] is connected with alternating current commercial power, and the output of the power supply [3] is connected with the positive electrode and the negative electrode of the battery pack. Part of the energy lost by the efficiency of the DCDC is replenished by the power supply [3 ]. The whole system operates efficiently, and the loss of the whole system is almost the efficiency loss of the DCDC. The electric energy consumed by aging is very little, a high-power supply is not required to be equipped, and the system cost is low.
The system has a defect that a plurality of tested DCDC power supplies [2] must be operated simultaneously, if one of the tested DCDC power supplies has a problem, the electric energy of a low-voltage storage battery connected to the output of the tested DCDC power supply is continuously consumed and cannot be supplemented, and further, the electric power is insufficient, so that the whole system cannot work. In order to make up for the defect, the system also comprises a plurality of backup DCDC power supplies [4], wherein each backup DCDC power supply [4] is connected with the anode and the cathode of the battery pack in input and is connected with each low-voltage storage battery [1] in output. When a certain tested DCDC [2] has a fault or is off-line, the backup DCDC power supply [4] replaces the tested power supply to maintain the operation of the whole set of system, thereby ensuring the flexibility of the system.
For protection and test, the input and output of the tested DCDC power supply are provided with a switch [5] [6] for disconnecting the tested DCDC from the battery.
The whole system also comprises a set of monitoring system, and the monitoring system is connected with the anode and the cathode of each low-voltage storage battery and monitors the voltage of each low-voltage storage battery. The monitoring system also includes a set of current sensors that measure the input and output currents of each of the DCDCs. The device also comprises a set of temperature sensors for measuring the temperature of each DCDC and each low-voltage storage battery.
Claims (7)
1. The high-efficiency low-cost vehicle-mounted DCDC power supply aging equipment is characterized by comprising a battery pack formed by connecting a plurality of low-voltage storage batteries in series, wherein the anode and the cathode of the battery pack after being connected in series are connected to the input side of a tested DCDC power supply, and the output side of each tested DCDC power supply is connected to each low-voltage storage battery.
2. The vehicle-mounted DCDC power supply aging device with high efficiency and low cost as claimed in claim 1, further comprising an ACDC power supply, wherein the input of the ACDC power supply is connected with AC commercial power, and the output of the ACDC power supply is connected with the positive electrode and the negative electrode of the battery pack.
3. The vehicle-mounted high-efficiency low-cost DCDC power supply aging device is characterized by further comprising a plurality of backup DCDC power supplies, wherein the input ends of the backup DCDC power supplies are connected with the positive electrode and the negative electrode of the battery pack, and the output ends of the backup DCDC power supplies are connected with the low-voltage storage batteries.
4. The high-efficiency low-cost vehicle-mounted DCDC power supply aging apparatus, as set forth in claim 1, wherein the input and output of the DCDC power supply under test have switches for disconnecting the DCDC power supply under test from the battery.
5. The vehicle-mounted high-efficiency low-cost DCDC power supply aging device according to claim 1, further comprising a monitoring system, wherein the monitoring system is connected with the positive electrode and the negative electrode of each low-voltage storage battery to monitor the voltage of each low-voltage storage battery.
6. The apparatus of claim 5, wherein the monitoring system further comprises a set of current sensors for measuring input and output currents of each DCDC.
7. The on-board DCDC power aging apparatus with high efficiency and low cost of claim 5, wherein the monitoring system further comprises a set of temperature sensors for measuring the temperature of each DCDC and each low voltage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921291538.7U CN210604925U (en) | 2019-08-11 | 2019-08-11 | High-efficiency low-cost vehicle-mounted DCDC power supply aging equipment |
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| CN201921291538.7U CN210604925U (en) | 2019-08-11 | 2019-08-11 | High-efficiency low-cost vehicle-mounted DCDC power supply aging equipment |
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| CN210604925U true CN210604925U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049978A (en) * | 2021-03-22 | 2021-06-29 | 西安新艾电气技术有限公司 | Online disturbance occurrence detection system and method for series power supply system |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049978A (en) * | 2021-03-22 | 2021-06-29 | 西安新艾电气技术有限公司 | Online disturbance occurrence detection system and method for series power supply system |
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