CN112350429A - Redundant low-voltage power supply system of electric automobile - Google Patents
Redundant low-voltage power supply system of electric automobile Download PDFInfo
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- CN112350429A CN112350429A CN202011186304.3A CN202011186304A CN112350429A CN 112350429 A CN112350429 A CN 112350429A CN 202011186304 A CN202011186304 A CN 202011186304A CN 112350429 A CN112350429 A CN 112350429A
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- 238000004146 energy storage Methods 0.000 claims abstract description 83
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims description 37
- 238000003745 diagnosis Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Classifications
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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
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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
Abstract
The invention discloses a redundant low-voltage power supply system of an electric automobile, which is designed into a DCDC converter, two energy storage units and a low-voltage protection control unit, and meets the requirements of two paths of independent power supplies of the low-voltage power supply system without mutual influence. Meanwhile, a control protection unit is arranged between the two low-voltage power supplies to monitor the high-voltage input state, the states of the two low-voltage power supplies and the states of the two low-voltage circuits, and when faults such as voltage input over-limit, short circuit of the low-voltage power supplies, short circuit of a redundant low-voltage circuit or a non-redundant low-voltage circuit occur, the control protection unit can carry out operations such as input voltage clamping, low-voltage power supply open circuit, disconnection between the redundant low-voltage circuit and the non-redundant low-voltage circuit on the circuit, and the local fault mutual noninterference state of.
Description
Technical Field
The invention belongs to the technical field of double-circuit independent low-voltage power supply of electric automobiles, and particularly relates to a redundant low-voltage power supply system of an electric automobile.
Background
The low-voltage power supply system is mainly used for supplying low-voltage power to various electrical components of the vehicle, and the electrical components cannot work normally if the power supply is interrupted and fails.
The low-voltage power supply system of the conventional automobile is basically used in the conventional low-voltage power supply system of the electric automobile, namely a 12V lead storage battery is adopted as a low-voltage power supply, but the reliability is low, and faults such as faults of the lead storage battery, short circuit and open circuit of a wire harness and the like can cause that electric parts of the whole automobile can not work normally, especially the power supply of a braking system and a steering system fails, so that driving safety accidents can occur, and the lives of a driver and passengers are damaged.
With the application of the intelligent driving technology to the electric automobile, the high reliability and the high safety required by the intelligent driving technology put forward higher requirements on a low-voltage power supply system of the electric automobile. Therefore, in order to meet the requirements of intelligent driving technology, a redundant low-voltage power supply system of the electric automobile needs to be provided, and the normal work of each electric appliance part of the electric automobile is ensured.
The main idea of the redundant low-voltage power supply system is that two independent energy storage units are provided, so that two paths of power supply sources are independent and do not influence each other. For example, two sets of low-voltage power supplies are designed according to the traditional automobile, namely two DCDCDCDC and two energy storage units are designed for the electric automobile, but the cost, the arrangement space and the weight of parts are increased.
Disclosure of Invention
The redundant low-voltage power supply system of the electric automobile disclosed by the invention meets the requirement that two paths of low-voltage power supply systems independently supply power and do not influence each other.
The invention discloses a redundant low-voltage power supply system of an electric automobile, which comprises a high-voltage battery, a DCDC converter, a redundant energy storage component, a main storage battery, a redundant power supply component, a non-redundant power supply component and a protection control unit, wherein the DCDC converter is connected with the high-voltage battery;
the high-voltage battery respectively charges the main storage battery and the redundant energy storage component through the DCDC converter; the non-redundant power supply component is powered by the main storage battery; the redundant power supply component is respectively provided with a low-voltage power supply by a redundant energy storage component and a main storage battery; the redundant energy storage component is connected with the main storage battery in parallel;
the protection control unit comprises a low-voltage power supply control circuit, a low-voltage power supply over-limit diagnosis circuit, a low-voltage power supply voltage detection circuit and a current detection circuit;
the low-voltage power supply control circuit is arranged on a parallel circuit of the redundant energy storage component and the main storage battery; when the whole vehicle normally works, the low-voltage power supply control circuit is switched on, and the DCDC converter charges the main storage battery and the redundant energy storage component;
the low-voltage power supply over-limit diagnosis circuit is arranged between the DCDC converter and the main storage battery, and when the DCDC output is in overvoltage, the voltage can be automatically limited within a designed value through an internal circuit of the low-voltage power supply over-limit diagnosis circuit;
the low-voltage power supply voltage detection circuit is bridged at two ends of the main storage battery and is responsible for detecting the power supply voltages of the main storage battery, the non-redundant power supply component and the power supply voltage of a main power supply loop of the redundant power supply component;
the current detection circuit is arranged in the protection control unit and is responsible for detecting the current passing through the protection control unit.
Furthermore, when the high-voltage battery fails and cannot output a high-voltage power supply, the protection control unit disconnects the main storage battery from the redundant energy storage component through the low-voltage power supply control circuit, and the main storage battery supplies power to the non-redundant power supply component and the redundant power supply component; the redundant energy storage component supplies power to the redundant power supply component.
Furthermore, when the DCDC converter cannot output due to the fault, the protection control unit disconnects the main storage battery from the redundant energy storage component through the low-voltage power supply control circuit, and the main storage battery supplies power to the non-redundant power supply component and the redundant power supply component; the redundant energy storage component supplies power to the redundant power supply component.
Further, when the DCDC converter outputs overvoltage, the protection control unit immediately controls the low-voltage power supply control circuit to be disconnected when the low-voltage power supply over-limit diagnosis circuit detects the low-voltage over-limit fault, and the low-voltage power supply of the main storage battery, the non-redundant power supply component and the redundant power supply component of the main power supply loop is ensured to be normal.
Further, when a redundant power supply loop of the redundant power supply component is short-circuited to the ground, the control protection unit detects the fault through the low-voltage power supply voltage detection circuit and the current detection circuit, the low-voltage power supply control circuit is controlled to be disconnected, the DCDC converter stops outputting, so that the parallel connection of the redundant energy storage component and the main storage battery is disconnected, and the main storage battery is ensured to normally supply power to the non-redundant power supply component.
Furthermore, when the internal short circuit of the redundant energy storage component occurs, the control protection unit detects the fault through the low-voltage power supply voltage detection circuit and the current detection circuit, the low-voltage power supply control circuit is controlled to be disconnected, the DCDC converter stops outputting, the parallel connection between the redundant energy storage component and the main storage battery is disconnected, the main storage battery is ensured to normally supply power to the non-redundant power supply component, and a user is prompted to replace the redundant energy storage component.
Further, when a power supply loop of the non-redundant power supply component is short-circuited to the ground, the control protection unit detects the fault through the low-voltage power supply voltage detection circuit and the current detection circuit, the low-voltage power supply control circuit is controlled to be disconnected so as to disconnect the parallel connection of the redundant energy storage component and the main storage battery, at the moment, the DCDC converter normally outputs, the redundant energy storage component is prevented from being reduced below the working range of the redundant energy storage component, and the redundant energy storage component is ensured to normally supply power to the redundant power supply component.
Further, when the main storage battery is internally short-circuited, the control protection unit detects the fault through the low-voltage power supply voltage detection circuit and the current detection circuit, controls the low-voltage power supply control circuit to be disconnected so as to disconnect the parallel connection of the redundant energy storage component and the main storage battery, and at the moment, the DCDC converter normally outputs, so that the redundant energy storage component is prevented from being reduced below the working range of the redundant energy storage component, the redundant energy storage component is ensured to normally supply power to the redundant power supply component, and a user is prompted to replace the main storage battery.
Further, when the main storage battery or the redundant energy storage component is damaged, the high-voltage battery directly supplies low-voltage power to the redundant power supply component and the non-redundant power supply component through the DCDC converter; and prompting a user to replace the main storage battery or the redundant energy storage component.
The beneficial technical effects of the invention are as follows:
1) the redundant low-voltage power supply system of the electric automobile is designed into a DCDC converter, two energy storage units and a low-voltage protection control unit, and the requirements that two paths of low-voltage power supply systems independently supply power and do not influence each other are met.
2) The two low-voltage power supplies are provided, and after one low-voltage power supply fails, the other low-voltage power supply can enable related electrical parts to work normally or in a certain specific state, so that the requirements of safety and reliability during driving of the electric automobile are met.
3) Meanwhile, a control protection unit is arranged between the two low-voltage power supplies to monitor the high-voltage input state, the states of the two low-voltage power supplies and the states of the two low-voltage circuits, and when faults such as voltage input over-limit, short circuit of the low-voltage power supplies, short circuit of a redundant low-voltage circuit or a non-redundant low-voltage circuit occur, the control protection unit can carry out operations such as input voltage clamping, low-voltage power supply open circuit, disconnection between the redundant low-voltage circuit and the non-redundant low-voltage circuit on the circuit, and the local fault mutual noninterference state of.
4) The invention can reduce the cost, volume and weight of the whole vehicle.
Drawings
FIG. 1 is a schematic diagram of an electric vehicle redundant low-voltage power supply system controlling processes 1 and 2;
FIG. 2 is a schematic diagram of the redundant low-voltage power supply system of the electric vehicle for controlling the processes 3, 4 and 5;
FIG. 3 is a schematic diagram of the redundant low voltage power supply system of the electric vehicle for controlling the processes 6 and 7;
fig. 4 is a schematic diagram of the redundant low-voltage power supply system of the electric vehicle for controlling the process 8.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The invention discloses a redundant low-voltage power supply system of an electric automobile, which comprises a high-voltage battery 01, a DCDC converter 02, a redundant energy storage component 03, a main storage battery 04, a redundant power supply component 06, a non-redundant power supply component 07 and a protection control unit 05, wherein the high-voltage battery is connected with the DCDC converter through a power supply line;
the high-voltage battery 01 charges a main storage battery 04 and a redundant energy storage component 03 respectively through a DCDC converter 02; the non-redundant power supply unit 07 is powered by the main battery 04; the redundant power supply part 06 is respectively provided with low-voltage power by a redundant energy storage part 03 and a main storage battery 04; the redundant energy storage component 03 is connected with the main storage battery 04 in parallel;
the protection control unit 05 comprises a low-voltage power supply control circuit 051, a low-voltage power supply over-limit diagnosis circuit 052, a low-voltage power supply voltage detection circuit 053 and a current detection circuit 054;
the low-voltage power supply control circuit 051 is arranged on a parallel circuit of the redundant energy storage component 03 and the main storage battery 04; when the whole vehicle normally works, the low-voltage power supply control circuit 051 is switched on, and the DCDC converter 02 charges the main storage battery 04 and the redundant energy storage component 03;
the low-voltage power supply over-limit diagnosis circuit 052 is arranged between the DCDC converter 02 and the main battery 04, and when the DCDC output is over-voltage, the voltage is automatically limited within a design value through an internal circuit; the internal part of the device has the voltage detection function of a low-voltage power supply.
The low-voltage power supply voltage detection circuit 053 is responsible for detecting the power supply voltages of the main battery 04, the non-redundant power supply unit 07, and the power supply voltage of the main power supply loop of the redundant power supply unit 06.
The current detection circuit 054 is disposed in the protection control unit 05, and is responsible for detecting a current passing through the protection control unit 05.
The high voltage battery 01 provides a high voltage power supply including a high voltage power supply of DCDC for the entire electric vehicle.
The DCDC converter 02 is a controller responsible for converting high-voltage direct current into low-voltage direct current, converts a power battery high-voltage direct current power supply into a low-voltage direct current power supply, and charges the redundant energy storage component 03 and the main storage battery 04. And charging the 12V energy storage component.
The redundant energy storage component 03 is a redundant low-voltage direct current storage and a redundant power supply, provides relatively low power supply voltage, and is different from high-voltage power supplies (generally, B-level voltage) such as a high-voltage power battery pack in an electric vehicle; the redundant energy storage component 03 is at a voltage below 36V, which may be, for example, 12V.
The main storage battery 04 is a storage for storing low-voltage direct current and a power supply, provides relatively low power supply voltage, and is different from high-voltage power supplies (generally, B-level voltage) such as a high-voltage power battery pack in an electric vehicle; the voltage of the main battery 04 is lower than 36V, and may be 12V, for example.
The protection control unit 05 is mainly a device for preventing the low-voltage power supply from exceeding the limit value, and has the functions of cutting off and connecting the low-voltage power supply, and protecting short circuit and open circuit. For convenience of explanation and cost reduction, the protection control unit 05 is only arranged on the main power supply loop, but the protection control unit 05 can also be arranged on the redundant power supply loop, or the main power supply loop and the redundant power supply loop can be arranged at the same time.
The redundant power supply controller 06 is a controller having a redundant power supply requirement, and is equivalent to two independent control circuits, two low-voltage power supplies of the redundant power supply controller are independent and do not interfere with each other, and the redundant power supply controller is generally a system with higher functional safety requirements, such as a braking system, a steering system, an intelligent driving system and the like.
The non-redundant power supply controller 07 is a controller commonly used in electric vehicles and not required by redundant power supply.
The invention discloses a redundant low-voltage power supply system of an electric automobile, which works in the following way:
in the control process 1, when the high-voltage battery 01 fails and cannot output a high-voltage power supply, the DCDC converter 02 stops outputting a low-voltage power supply and cannot charge the main storage battery 04 and the redundant energy storage component 03, the protection control unit 05 disconnects the main storage battery 04 from the redundant energy storage component 03 through the low-voltage power supply control circuit 051, and the main storage battery 04 and the redundant energy storage component 03 are prevented from influencing each other; at this time, the main storage battery 04 supplies power to the non-redundant power supply part 07 and the redundant power supply part 06; the redundant energy storage component 03 supplies power to the redundant power supply component 07, and the power supply principle thereof is shown in fig. 1.
In the control process 2, when the DCDC converter 02 cannot output power due to a fault and cannot charge the main storage battery 04 and the redundant energy storage component 03, the protection control unit 05 disconnects the main storage battery 04 from the redundant energy storage component 03 through the low-voltage power supply control circuit 051, so that the main storage battery 04 and the redundant energy storage component 03 are prevented from being influenced by each other; at this time, the main storage battery 04 supplies power to the non-redundant power supply part 07 and the redundant power supply part 06; the redundant energy storage component 03 supplies power to the redundant power supply component 07, and the power supply principle thereof is shown in fig. 1.
And 3, when the DCDC converter 02 outputs overvoltage, the protection control unit 05 automatically clamps the voltage in a normal voltage range through the low-voltage power supply over-limit diagnosis circuit 052 and controls the low-voltage power supply control circuit 051 to be disconnected so as to ensure that the low-voltage power supplies of the main storage battery 04, the non-redundant power supply part 07 and the redundant power supply part 06 of the main power supply loop are normal, and the power supply principle diagram is shown in figure 2. If the protection control unit 05 is arranged in the redundant power supply loop, the low-voltage power supply of the redundant energy storage component 03 and the redundant power supply component 06 of the redundant power supply loop is ensured to be normal.
And 4, when a redundant power supply loop of the redundant power supply component 06 is short-circuited to the ground, the control protection unit 05 detects the fault through the low-voltage power supply voltage detection circuit 053 and the current detection circuit 054, controls the low-voltage power supply control circuit 051 to be disconnected, and stops outputting by the DCDC converter 02 so as to disconnect the parallel connection of the redundant energy storage component 03 and the main storage battery 04, ensure that the main storage battery 04 supplies power to the non-redundant power supply component 07 normally, ensure that relevant electrical components of the main power supply loop work normally, and the power supply principle diagram is shown in FIG. 2.
And 5, when the internal of the redundant energy storage component 03 is short-circuited, the control protection unit 05 detects the fault through the low-voltage power supply voltage detection circuit 053 and the current detection circuit 054, controls the low-voltage power supply control circuit 051 to be disconnected, and stops outputting by the DCDC converter 02 to disconnect the parallel connection of the redundant energy storage component 03 and the main storage battery 04, so that the main storage battery 04 is ensured to normally supply power to the non-redundant power supply component 07, the related electrical components of the main power supply loop are ensured to normally work, and a user is prompted to replace the redundant energy storage component 03, wherein the power supply schematic diagram is shown in FIG. 2.
A control process 6, when a power supply loop of the non-redundant power supply component 07 is short-circuited to the ground, the control protection unit 05 detects the fault through the low-voltage power supply voltage detection circuit 053 and the current detection circuit 054, and controls the low-voltage power supply control circuit 051 to be disconnected so as to disconnect the parallel connection between the redundant energy storage component 03 and the main storage battery 04, and at the moment, the DCDC converter 02 normally outputs; the redundant energy storage component 03 is prevented from being reduced to be below the working range of the redundant energy storage component 03 due to the faults, and the normal work of the related electrical components of the redundant power supply loop is ensured, and the power supply principle diagram is shown in fig. 3.
A control process 7, when the main storage battery 04 is short-circuited, the control protection unit 05 detects the fault through the low-voltage power supply voltage detection circuit 053 and the current detection circuit 054, and controls the low-voltage power supply control circuit 051 to be disconnected so as to disconnect the parallel connection between the redundant energy storage component 03 and the main storage battery 04, and at the moment, the DCDC converter 02 normally outputs; the redundant energy storage component 03 is prevented from being reduced to be below the working range of the redundant energy storage component, the normal work of the related electrical components of the redundant power supply loop is guaranteed, a user is prompted to replace the main storage battery 04, and the power supply principle diagram is shown in fig. 3.
A control process 8, when the main storage battery 04 or the redundant energy storage component 03 is damaged and cannot store energy, the high-voltage battery 01 directly supplies low-voltage power to the redundant power supply component 06 and the non-redundant power supply component 07 through the DCDC converter 02; the control protection unit 05 detects the related faults and prompts a user to replace the main storage battery 04 or the redundant energy storage component 03, and the power supply principle diagram of the control protection unit is shown in fig. 4.
The invention is used for a whole vehicle low-voltage power supply system of an electric vehicle with a double-path independent low-voltage power supply requirement, meets the reliable and safe requirements of low-voltage power supply of a controller and electric appliance parts, and is mainly applied to the fields of braking, steering, intelligent driving and the like of the electric vehicle.
Claims (9)
1. The utility model provides a redundant low-voltage power supply system of electric automobile which characterized in that: the device comprises a high-voltage battery (01), a DCDC converter (02), a redundant energy storage component (03), a main storage battery (04), a redundant power supply component (06), a non-redundant power supply component (07) and a protection control unit (05);
the high-voltage battery (01) charges a main storage battery (04) and a redundant energy storage component (03) through a DCDC converter respectively; the non-redundant power supply part (07) is powered by a main storage battery (04); the redundant power supply component (06) is respectively provided with a low-voltage power supply by the redundant energy storage component (03) and the main storage battery (04); the redundant energy storage component (03) is connected with the main storage battery (04) in parallel;
the protection control unit (05) comprises a low-voltage power supply control circuit (051), a low-voltage power supply over-limit diagnosis circuit (052), a low-voltage power supply voltage detection circuit (053) and a current detection circuit (054);
the low-voltage power supply control circuit (051) is arranged on a parallel circuit of the redundant energy storage component (03) and the main storage battery (04); when the whole vehicle normally works, the low-voltage power supply control circuit (051) is switched on, and the DCDC converter (02) charges the main storage battery (04) and the redundant energy storage component (03);
a low-voltage power supply over-limit diagnosis circuit (052) is arranged between the DCDC converter (02) and the main storage battery (04), and when the DCDC output is in overvoltage, the voltage can be automatically limited within a designed value through an internal circuit thereof;
the low-voltage power supply voltage detection circuit (053) is bridged at two ends of the main storage battery (04) and is responsible for detecting the power supply voltages of the main storage battery (04) and the non-redundant power supply component (07) and the power supply voltage of a main power supply loop of the redundant power supply component (06);
a current detection circuit (054) is disposed in the protection control unit (05) and is responsible for detecting a current passing through the protection control unit (05).
2. The redundant low-voltage power supply system of the electric automobile as claimed in claim 1, wherein: when the high-voltage battery (01) fails and cannot output a high-voltage power supply, the protection control unit (05) disconnects the main storage battery 04 from the redundant energy storage component (03) through the low-voltage power supply control circuit (051), and the main storage battery (04) supplies power to the non-redundant power supply component (07) and the redundant power supply component (06); the redundant energy storage component (03) supplies power to the redundant power supply component (07).
3. The redundant low-voltage power supply system of the electric automobile as claimed in claim 2, wherein: when the DCDC converter (02) cannot output due to the fault, the protection control unit (05) disconnects the main storage battery (04) from the redundant energy storage component (03) through the low-voltage power supply control circuit (051), and the main storage battery (04) supplies power to the non-redundant power supply component (07) and the redundant power supply component (06); the redundant energy storage component (03) supplies power to the redundant power supply component (07).
4. The redundant low-voltage power supply system of the electric automobile according to claim 3, characterized in that: when the DCDC converter (02) outputs overvoltage, the protection control unit (05) immediately controls the low-voltage power supply control circuit (051) to be disconnected when the low-voltage power supply over-limit fault is detected by the low-voltage power supply over-limit diagnosis circuit (052), and the low-voltage power supply of the main storage battery (04), the non-redundant power supply component (07) and the redundant power supply component (06) of the main power supply loop is ensured to be normal.
5. The redundant low-voltage power supply system of the electric automobile as claimed in claim 4, wherein: when a redundant power supply loop of the redundant power supply component (06) is short-circuited to the ground, the control protection unit (05) detects the fault through the low-voltage power supply voltage detection circuit (053) and the current detection circuit (054), the low-voltage power supply control circuit (051) is controlled to be disconnected, the DCDC converter (02) stops outputting, so that the parallel connection between the redundant energy storage component (03) and the main storage battery (04) is disconnected, and the main storage battery (04) is ensured to normally supply power to the non-redundant power supply component 07.
6. The redundant low-voltage power supply system of the electric automobile as claimed in claim 5, wherein: when the redundant energy storage component (03) is internally short-circuited, the control protection unit (05) detects the fault through the low-voltage power supply voltage detection circuit (053) and the current detection circuit (054), the low-voltage power supply control circuit (051) is controlled to be disconnected, the DCDC converter (02) stops outputting, the parallel connection of the redundant energy storage component (03) and the main storage battery (04) is disconnected, the main storage battery (04) is ensured to normally supply power to the non-redundant power supply component (07), and a user is prompted to replace the redundant energy storage component (03).
7. The redundant low-voltage power supply system of the electric automobile as claimed in claim 6, wherein: when a power supply loop of the non-redundant power supply component (07) is short-circuited to the ground, the control protection unit (05) detects the fault through the low-voltage power supply voltage detection circuit (053) and the current detection circuit (054), and controls the low-voltage power supply control circuit (051) to be disconnected so as to disconnect the parallel connection of the redundant energy storage component (03) and the main storage battery (04), at the moment, the DCDC converter (02) normally outputs, the redundant energy storage component (03) is prevented from being reduced below the working range of the redundant energy storage component (03), and the redundant energy storage component (03) is ensured to normally supply power to the redundant power supply component (06).
8. The redundant low-voltage power supply system of an electric vehicle as claimed in claim 7, wherein: when the main storage battery (04) is internally short-circuited, the control protection unit (05) detects the fault through the low-voltage power supply voltage detection circuit (053) and the current detection circuit (054), and controls the low-voltage power supply control circuit (051) to be disconnected so as to disconnect the parallel connection of the redundant energy storage component (03) and the main storage battery (04), at the moment, the DCDC converter 02 normally outputs, the redundant energy storage component (03) is prevented from being reduced below the working range of the redundant energy storage component, the redundant energy storage component (03) is ensured to normally supply power to the redundant power supply component (06), and a user is prompted to replace the main storage battery (04).
9. The redundant low-voltage power supply system of the electric vehicle as claimed in claim 8, wherein: when the main storage battery (04) or the redundant energy storage component (03) is damaged, the high-voltage battery (01) directly supplies low-voltage power to the redundant power supply component (06) and the non-redundant power supply component (07) through the DCDC converter (02); and prompting a user to replace the main storage battery (04) or the redundant energy storage component (03).
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| CN202011186304.3A CN112350429A (en) | 2020-10-29 | 2020-10-29 | Redundant low-voltage power supply system of electric automobile |
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| CN202011186304.3A CN112350429A (en) | 2020-10-29 | 2020-10-29 | Redundant low-voltage power supply system of electric automobile |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112947043A (en) * | 2021-03-19 | 2021-06-11 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Vehicle redundancy control system, control method thereof and vehicle |
| CN114211962A (en) * | 2021-12-08 | 2022-03-22 | 华人运通(江苏)技术有限公司 | Low-voltage power supply management system of electric automobile and electric automobile |
| CN114475489A (en) * | 2021-12-27 | 2022-05-13 | 奇瑞汽车股份有限公司 | Power supply system of automobile, automobile and control method of power supply system of automobile |
| CN114726083A (en) * | 2022-04-19 | 2022-07-08 | 威海天力电源科技有限公司 | Automatic driving power distribution and power management system |
| CN117747990A (en) * | 2024-02-15 | 2024-03-22 | 昆明市官渡区职业高级中学 | New energy automobile power battery maintenance detection system and method |
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| CN117747990A (en) * | 2024-02-15 | 2024-03-22 | 昆明市官渡区职业高级中学 | New energy automobile power battery maintenance detection system and method |
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