CN219651014U - Power supply device of battery management system - Google Patents
Power supply device of battery management system Download PDFInfo
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- CN219651014U CN219651014U CN202320982965.XU CN202320982965U CN219651014U CN 219651014 U CN219651014 U CN 219651014U CN 202320982965 U CN202320982965 U CN 202320982965U CN 219651014 U CN219651014 U CN 219651014U
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- 238000007599 discharging Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
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- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model discloses a power supply device of a battery management system, which comprises a power battery, a whole-vehicle low-voltage storage battery, a charging low-voltage component and a common cathode diode, wherein the common cathode diode comprises two independent current channels, the output ends of the two current channels are connected to the input end of the battery management system, the input end of one current channel is connected to the output end of the power battery through a whole-vehicle low-voltage electric bottle, and the input end of the other current channel is connected to the output end of the power battery through the charging low-voltage component; the power supply device isolates the whole low-voltage storage battery from the battery management system power supply and the charging low-voltage power component from the battery management system power supply, the two power supply paths are not affected by each other, and the problem of low-voltage power bottle power shortage is solved.
Description
Technical Field
The utility model relates to the technical field of electric automobiles, in particular to a power supply device of a battery management system.
Background
And the battery management system (BMS for short) is used as a core device of the power battery system, bears the responsibility of monitoring the health state of the single body, and also keeps interaction with other devices of the whole vehicle at the same time, so that the normal running of the whole vehicle is ensured. In the whole vehicle charging process, the BMS needs to work all the time to monitor the power battery monomer state, the BMS working power supply is normally provided by the whole vehicle low-voltage electric bottle, but the whole vehicle DC/DC needs to be guaranteed to be in the working state at the moment, otherwise, in the whole charging stage, particularly in the slow charging stage, the time is longer, the BMS needs to consume the electric quantity of the low-voltage electric bottle all the time, if the DC/DC does not work at the moment, the whole vehicle low-voltage electric bottle is damaged in a power shortage mode, and irreversible damage is caused to the whole vehicle low-voltage electric bottle.
Disclosure of Invention
Based on the technical problems in the background art, the utility model provides a power supply device of a battery management system, which isolates a whole vehicle low-voltage storage battery from a charging low-voltage power supply assembly to power supply of the battery management system, and two power supply paths are not affected by each other, so that the problem of low-voltage power consumption of a low-voltage battery is solved.
The utility model provides a power supply device of a battery management system, which comprises a power battery, a whole-vehicle low-voltage storage battery, a charging low-voltage component and a common cathode diode, wherein the common cathode diode comprises two independent current channels, the output ends of the two current channels are connected to the input end of the battery management system, the input end of one current channel is connected to the output end of the power battery through a whole-vehicle low-voltage electric bottle, and the input end of the other current channel is connected to the output end of the power battery through the charging low-voltage component.
Further, the common cathode diode comprises a first rectifying diode and a second rectifying diode, the first rectifying diode and the second rectifying diode are respectively used as two independent current channels, the negative electrode ends of the first rectifying diode and the second rectifying diode are connected to the battery management system, the positive electrode end of the first rectifying diode is connected to the output end of the whole vehicle low-voltage storage battery, and the positive electrode end of the second rectifying diode is connected to the output end of the charging low-voltage component.
Further, the two ends of the first rectifying diode are respectively provided with a pole (1) and a pole (2), the positive electrode end of the second rectifying diode is provided with a pole (3), the negative electrode end of the second rectifying diode and the negative electrode end of the first rectifying diode share the same pole (1), and the first rectifying diode, the second rectifying diode, the pole (1), the pole (2) and the pole (3) are integrated into a whole and are installed on the whole vehicle.
Further, the power supply device further comprises a DC/DC, and two ends of the DC/DC are respectively connected between the power battery and the whole vehicle piezoelectric bottle.
Further, the charging low-voltage electric component comprises a vehicle-mounted charger low-voltage electric and a quick charging pile low-voltage electric, two ends of the vehicle-mounted charger low-voltage electric are respectively connected to the output end of the power battery and the positive end of the second rectifying diode, and two ends of the quick charging pile low-voltage electric are respectively connected to the output end of the power battery and the positive end of the second rectifying diode.
Further, the vehicle-mounted charger charges slowly at low voltage and charges rapidly at low voltage.
Further, the output ends of the low voltage electricity of the vehicle-mounted charger and the low voltage electricity of the quick charging pile are in signal connection with the battery management system so as to feed back charging connection signals to the battery management system.
Further, the low-voltage battery of the whole vehicle is isolated from the charging connection signal.
The power supply device of the battery management system has the advantages that: the power supply device of the battery management system provided by the structure of the utility model has the advantages that the common cathode diode can realize that two paths of power input are output from the same path, and the arrangement of two independent current channels isolates the power supply of the whole vehicle low-voltage storage battery to the battery management system from the power supply of the charging low-voltage power component to the battery management system, so that the two power supply paths are not influenced; when the whole vehicle is in a charging working condition, when the DC/DC cannot work, the charging low-voltage power component can be used for providing a working power supply for the battery management system, and the electric quantity of the low-voltage battery of the whole vehicle is not required to be consumed.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
the system comprises a 1-power battery, a 2-whole vehicle low-voltage storage battery, a 3-charging low-voltage electric component, a 4-common cathode diode, a 5-battery management system, 6-DC/DC, 31-vehicle-mounted charger low voltage electric, 32-quick-charging pile low voltage electric, 41-first rectifying diode and 42-second rectifying diode.
Detailed Description
In the following detailed description of the present utility model, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.
As shown in fig. 1, the power supply device of the battery management system provided by the utility model comprises a power battery 1, a whole-vehicle low-voltage battery 2, a charging low-voltage electric component 3 and a common cathode diode 4, wherein the common cathode diode 4 comprises two independent current channels, the output ends of the two current channels are connected to the input end of the battery management system 5, the input end of one current channel is connected to the output end of the power battery 1 through the whole-vehicle low-voltage electric bottle 2, and the input end of the other current channel is connected to the output end of the power battery 1 through the charging low-voltage electric component 3.
The common cathode diode 4 can realize that two paths of power input are output from the same path, and the two independent current channels are arranged to isolate the power supply of the whole vehicle low-voltage storage battery 2 to the battery management system 5 from the power supply of the charging low-voltage power component 3 to the battery management system 5, so that the two power supply paths are not affected by each other.
The power supply device further comprises a DC/DC6, two ends of the DC/DC6 are respectively connected between the power battery 1 and the whole vehicle low-voltage electric bottle 2, so that when the whole vehicle is in a charging working condition, when the DC/DC6 cannot work, the charging low-voltage electric assembly 3 can be used for providing a working power supply for the battery management system 5, at the moment, the electric quantity of the whole vehicle low-voltage battery 2 is not required to be consumed, the electric quantity of the whole vehicle low-voltage battery 2 is always consumed when the whole vehicle low-voltage electric bottle 2 is charged, particularly under the slow charging condition, the charging time is long, the overdischarge of the whole vehicle low-voltage electric bottle is easily caused, the electric loss caused by the whole vehicle low-voltage electric bottle cannot be reversed, and the defect that the whole vehicle low-voltage electric bottle needs to be replaced when serious is caused is avoided.
In this embodiment, the common cathode diode 4 includes a first rectifying diode 41 and a second rectifying diode 42, the first rectifying diode 41 and the second rectifying diode 42 are respectively used as two independent current channels, the negative ends of the first rectifying diode 41 and the second rectifying diode 42 are both connected to the battery management system (5), the positive end of the first rectifying diode 41 is connected to the output end of the whole vehicle low voltage electric bottle 2, and the positive end of the second rectifying diode 42 is connected to the output end of the charging low voltage electric component 3.
The two ends of the first rectifying diode 41 are respectively provided with a pole (1) and a pole (2), the positive end of the second rectifying diode 42 is provided with a pole (3), the negative end of the second rectifying diode 42 and the negative end of the first rectifying diode 41 share the same pole (1), and the first rectifying diode 41, the second rectifying diode 42, the pole (1), the pole (2) and the pole (3) are integrated into a whole and are installed on the whole vehicle.
Specifically, the pole (2) is connected with the whole vehicle low-voltage electric bottle (2), when the whole vehicle is in a driving working condition, the power battery (1) is in a discharging state, at the moment, the whole vehicle DC/DC6 is in a working state, the high voltage of the power battery (1) is reduced by the DC/DC6 to charge the whole vehicle low-voltage electric bottle (2), in the driving process of the whole vehicle, the battery management system (5) needs to always work to monitor the health state of a battery pack, at the moment, the power supply needed by the battery management system (5) is provided by a circuit formed by the whole vehicle low-voltage battery (2) through a first rectifying diode (41) between the pole (2) and the pole (1), when the whole vehicle low-voltage battery (2) is in a low-power state, the DC/DC6 charges the whole vehicle low-voltage battery (2) to ensure that the whole vehicle low-voltage battery (2) cannot be lack of electricity, when the pole (2) has voltage, the first rectifying diode (41) between the pole (2) and the pole (1) is in a conducting state, and the second rectifying diode (42) between the pole (3) is in an off state, and the voltage is not to cause interference to a charging connection signal of the battery management system (5).
The pole (3) is connected with the quick-charging pile low-voltage power supply 32 (quick-charging), when the whole vehicle is in a quick-charging working condition, after a quick-charging pile end charging plug is inserted with a whole vehicle end socket, the quick-charging pile low-voltage power supply 32 supplies power to the battery management system 5 through a circuit formed by a second rectifying diode 42 between the common cathode diode poles (3) and (1), and the electric quantity of the whole vehicle low-voltage storage battery 2 is not consumed at the moment.
The pole (3) is connected with the low-voltage battery 31 (slow charging) of the vehicle-mounted charger, when the vehicle is in a slow charging working condition, after the slow charging plug and the charging socket are inserted, the low-voltage battery 31 of the vehicle-mounted charger supplies power to the battery management system 5 through a circuit formed by the second rectifying diode 42 between the pole (3) and the pole (1) of the common cathode diode, and at the moment, the electric quantity of the low-voltage battery 2 of the vehicle is not required to be consumed.
The common cathode diode 4 is used, the whole vehicle low-voltage electric bottle 2 and the charging low-voltage electric assembly 3 can supply power for the BMS at the same time, if the common cathode diode 4 is not used, the power line of the whole vehicle low-voltage electric bottle 2 is directly connected with the power line of the vehicle-mounted charger low-voltage electric device 31 and the power line of the quick charging pile low-voltage electric device 32, the battery management system 5 can work normally, but the charging connection signal can be used for always supplying the power of the whole vehicle low-voltage electric bottle 2 to the battery management system 5 through a schematic diagram, the battery management system 5 can judge that the whole vehicle is in a charging state at the moment, and the whole vehicle cannot go to a high-voltage discharging process, so that the whole vehicle cannot normally run. The common cathode diode 4 is used, and the unidirectional conduction characteristic of the common cathode diode 4 is utilized to isolate the whole vehicle piezoelectric bottle 2 from a charging connection signal, so that the whole vehicle can be normally charged and discharged. Under the working condition that the DC/DC6 does not work in the charging process, the whole vehicle power supply device can use the power supply strategy to solve the problem that the battery is deficient due to the fact that the electric quantity of the whole vehicle low-voltage battery 2 is consumed all the time in the charging process, and the vehicle cannot be started.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (8)
1. The utility model provides a power supply unit of battery management system, a serial communication port, including power battery (1), whole car low voltage electric bottle (2), low voltage subassembly (3) and common negative diode (4) charge, common negative diode (4) include two independent current channel, the output of two current channel all is connected to the input of battery management system (5), the input of one of them current channel is connected to the output of power battery (1) through whole car low voltage electric bottle (2), the input of another current channel is connected to the output of power battery (1) through low voltage subassembly (3) charge.
2. The power supply device of the battery management system according to claim 1, wherein the common cathode diode (4) comprises a first rectifying diode (41) and a second rectifying diode (42), the first rectifying diode (41) and the second rectifying diode (42) are respectively used as two independent current channels, the negative terminals of the first rectifying diode (41) and the second rectifying diode (42) are both connected to the battery management system (5), the positive terminal of the first rectifying diode (41) is connected to the output terminal of the whole vehicle low-voltage electric bottle (2), and the positive terminal of the second rectifying diode (42) is connected to the output terminal of the charging low-voltage electric component (3).
3. The power supply device of a battery management system according to claim 2, wherein the two ends of the first rectifying diode (41) are respectively provided with a pole (1) and a pole (2), the positive end of the second rectifying diode (42) is provided with a pole (3), the negative end of the second rectifying diode (42) and the negative end of the first rectifying diode (41) share the same pole (1), and the first rectifying diode (41), the second rectifying diode (42), the pole (1), the pole (2) and the pole (3) are integrated into a whole and mounted on the whole vehicle.
4. The power supply device of the battery management system according to claim 2, characterized in that the power supply device further comprises a DC/DC (6), both ends of the DC/DC (6) being connected between the power battery (1) and the whole vehicle piezoelectric bottle (2), respectively.
5. The power supply device of the battery management system according to claim 2, wherein the charging low-voltage power module (3) comprises a vehicle-mounted charger low-voltage power supply (31) and a fast charging pile low-voltage power supply (32), two ends of the vehicle-mounted charger low-voltage power supply (31) are respectively connected to an output end of the power battery (1) and an anode end of the second rectifying diode (42), and two ends of the fast charging pile low-voltage power supply (32) are respectively connected to an output end of the power battery (1) and an anode end of the second rectifying diode (42).
6. The power supply device of the battery management system according to claim 5, wherein the vehicle-mounted charger is low-voltage (31) and the fast-voltage (32) is fast-voltage.
7. The power supply device of a battery management system according to claim 5, wherein the output ends of the vehicle-mounted charger low voltage (31) and the fast charging pile low voltage (32) are in signal connection with the battery management system (5) to feed back a charging connection signal to the battery management system (5).
8. The power supply device of a battery management system according to claim 7, characterized in that the whole vehicle piezo-electric bottle (2) is isolated from the charging connection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320982965.XU CN219651014U (en) | 2023-04-26 | 2023-04-26 | Power supply device of battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320982965.XU CN219651014U (en) | 2023-04-26 | 2023-04-26 | Power supply device of battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219651014U true CN219651014U (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320982965.XU Active CN219651014U (en) | 2023-04-26 | 2023-04-26 | Power supply device of battery management system |
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| Country | Link |
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| CN (1) | CN219651014U (en) |
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2023
- 2023-04-26 CN CN202320982965.XU patent/CN219651014U/en active Active
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