CN211106992U - High-voltage power distribution system of electric automobile based on fuel cell - Google Patents
High-voltage power distribution system of electric automobile based on fuel cell Download PDFInfo
- Publication number
- CN211106992U CN211106992U CN201921433962.0U CN201921433962U CN211106992U CN 211106992 U CN211106992 U CN 211106992U CN 201921433962 U CN201921433962 U CN 201921433962U CN 211106992 U CN211106992 U CN 211106992U
- Authority
- CN
- China
- Prior art keywords
- subsystem
- fuel cell
- contactor
- controller
- main motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 153
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 82
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 82
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 11
- 229910052739 hydrogen Inorganic materials 0.000 description 11
- 239000001257 hydrogen Substances 0.000 description 11
- 230000005611 electricity Effects 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- 239000000306 component Substances 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model relates to a fuel cell-based high-voltage power distribution system of an electric automobile, which comprises a main motor controller, a fuel cell subsystem, a lithium power battery subsystem, an all-in-one controller and a pre-charging resistor; the lithium power battery subsystem is electrically connected with the main motor controller sequentially through the pre-charging resistor and the all-in-one controller, the lithium power battery subsystem is electrically connected with the main motor controller sequentially through the all-in-one controller, the lithium power battery subsystem is electrically connected with the fuel battery subsystem sequentially through the pre-charging resistor and the all-in-one controller, the lithium power battery subsystem is electrically connected with the fuel battery subsystem sequentially through the all-in-one controller, and the main motor controller is electrically connected with the fuel battery subsystem. The utility model discloses a precharge resistance of sharing has effectively saved the cost to can also carry out corresponding pre-filling for the fuel cell subsystem selectively when accomplishing the pre-filling for main motor controller.
Description
Technical Field
The utility model relates to a new forms of energy technical field, in particular to electric automobile high voltage distribution system based on fuel cell.
Background
Due to global energy shortage and growing concern about the living environment, hydrogen energy, which is now the most important secondary energy source, is rapidly developing at an alarming rate. Since the 21 st century, research on hydrogen energy in the fields of rail transportation and the like has been active, and hydrogen fuel cells are now one of the most active research fields of hydrogen energy. Wherein, the hydrogen as the fuel has the advantages that water can be used as the raw material, and the resource is rich; and the heat emitted during combustion is large; the combustion product is water, is non-toxic and pollution-free, can be recycled and reused, and is called as green energy. Furthermore, hydrogen can be extracted from the electrolyzed water and coal gasification in a large amount, and the automobile engine does not need to be greatly modified, so that the hydrogen energy has wide application prospect as power. The pure electric vehicle with the hydrogen fuel cell has the advantages of high energy conversion rate, zero pollution emission, good fuel economy and the like, and is widely concerned and strongly supported by governments, enterprises and academic circles of various countries.
The high-voltage distribution system, which is a core part of a hydrogen fuel cell electric vehicle, i.e., a high-voltage and high-current distribution unit of the electric vehicle, is designed to be a highly integrated high-voltage distribution system, which is a new technical problem to be solved urgently in the field. On the premise that a high-voltage power distribution system works normally and is reliable and stable, the cost can be effectively controlled by using the power distribution of the integrated fuel cell system, and the rapid development of the electric automobile is facilitated.
However, the current general fuel cell electric vehicle does not use the power distribution of the integrated fuel cell system, which causes the following problems: 1. the fuel cell system additionally adds a pre-charging loop without sharing a pre-charging resistor with the motor controller, resulting in additional cost increase; 2. a part of fuel cell electric automobiles are independently configured with fuel cells for power distribution, so that the whole automobile equipment is increased, and the difficulty of space arrangement in the automobile is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric automobile high voltage power distribution system based on fuel cell for fuel cell subsystem and main motor controller MCU's pre-charge resistance sharing has effectively saved the cost that extra increase pre-charge resistance caused, and can accomplish the pre-charge for main motor controller MCU when, can selectively also carry out corresponding pre-charge for the fuel cell subsystem, has accomplished the mutual independence of two subsystems.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a high-voltage power distribution system of an electric automobile based on a fuel cell comprises a main motor controller, a fuel cell subsystem, a lithium power cell subsystem, an all-in-one controller and a pre-charging resistor;
the lithium power battery subsystem sequentially passes through the pre-charging resistor and the all-in-one controller and is electrically connected with the main motor controller, the lithium power battery subsystem further passes through the all-in-one controller and is electrically connected with the main motor controller, the lithium power battery subsystem sequentially passes through the pre-charging resistor and the all-in-one controller and is electrically connected with the fuel battery subsystem, the lithium power battery subsystem further passes through the all-in-one controller and is electrically connected with the fuel battery subsystem, and the main motor controller is electrically connected with the fuel battery subsystem.
The utility model has the advantages that: because the main motor controller of the electric automobile is provided with a larger bus capacitor, under the condition of cold starting without pre-charging, if the main relay is directly switched on, the high voltage of the battery is directly loaded on the empty bus capacitor, which is equivalent to instantaneous short circuit, and the relay can be damaged by extremely large instantaneous current; after adding the pre-charging resistance, carry on the pre-charging with the bus capacitor through the pre-charging circuit first, the electric current when the main circuit is put through just can be controlled in the safe scope like this, ensure the system normal operating, therefore, the utility model provides an electric automobile high-voltage distribution system, including the pre-charging of two processes, be the last electricity pre-charging of main motor controller and the last electricity pre-charging of fuel cell subsystem respectively, correspond first pre-charging state and the second pre-charging state that is the pre-charging resistance respectively, wherein, still include corresponding high voltage electricity process after the last electricity pre-charging of main motor controller is accomplished, still include corresponding high voltage electricity process after the last electricity pre-charging of fuel cell subsystem is accomplished;
the utility model provides an all-in-one controller is used for controlling the pre-charging resistance to be set up to first pre-charging state or second pre-charging state, and first pre-charging state corresponds to the pre-charging electricity of main motor controller, and second pre-charging state corresponds to the pre-charging electricity of fuel cell subsystem; the lithium power battery subsystem is electrically connected with the main motor controller through the pre-charging resistor and the all-in-one controller in sequence, the lithium power battery subsystem is also electrically connected with the main motor controller through the all-in-one controller in sequence, the lithium power battery subsystem is electrically connected with the fuel battery subsystem through the pre-charging resistor and the all-in-one controller in sequence, the lithium power battery subsystem is also electrically connected with the fuel battery subsystem through the all-in-one controller, and the main motor controller is electrically connected with the fuel battery subsystem; therefore, the main motor controller is pre-charged firstly, the pre-charging resistor is controlled to be set to be in a first pre-charging state through the all-in-one controller, namely, the whole vehicle is pre-charged to the main motor controller, at the moment, the fuel cell subsystem is not started, and power is sourced from the lithium power cell subsystem; when the fuel cell subsystem needs to be precharged, the precharging resistor is controlled to be set to be in a second precharging state through the all-in-one controller, namely, the whole vehicle is started to be precharged to the fuel cell subsystem, and power is sourced from the lithium power cell subsystem;
the utility model discloses an foretell fuel cell based electric automobile high voltage distribution system, can make fuel cell subsystem and main motor controller MCU's pre-filling process share a pre-charge resistance, only need a pre-charge resistance, effectively saved the use of the independent pre-charge resistance of fuel cell subsystem, saved the cost that extra increase pre-charge resistance caused, can realize when accomplishing the pre-charge for main motor controller MCU, can selectively also carry out corresponding pre-charge for the fuel cell subsystem, really accomplish mutual independence of two subsystems, need not to carry out the distribution for fuel cell alone, integrate higher, make things convenient for the arrangement of space in the car;
wherein, the controller that unifies more is the integrated module that relay or switch and resistance are constituteed, and accessible design or change its inside each component's connection structure realize the utility model provides a control pre-charge resistance is set up to the function of first pre-charge state or second pre-charge state, and does not relate to the improvement of computer program, and the switch of control relay or switch, can send closed instruction or disconnection instruction through multiple mode, for example vehicle control unit, or open or close through user's manual, all can realize the first pre-charge state or the second pre-charge state that the pre-charge resistance was controlled through the controller that unifies more is by, also do not relate to the improvement of computer program.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
further: the all-in-one controller comprises a first contactor and a second contactor;
the lithium power battery subsystem is electrically connected with the main motor controller sequentially through the pre-charging resistor and the first contactor, and the lithium power battery subsystem is also electrically connected with the main motor controller through the second contactor.
Further: the all-in-one controller further comprises a third contactor and a fourth contactor;
the lithium power battery subsystem is also electrically connected with the fuel battery subsystem sequentially through the pre-charging resistor and the third contactor, and the lithium power battery subsystem is also electrically connected with the fuel battery subsystem through the fourth contactor.
Further: the all-in-one controller further comprises a first fuse;
the lithium power battery subsystem is electrically connected with the fuel battery subsystem sequentially through the fourth contactor and the first fuse.
Further: the system further comprises a first DC-DC converter;
the first DC-DC converter is electrically connected to the lithium power battery subsystem and the fuel cell subsystem, respectively.
Further: the all-in-one controller further comprises a fifth contactor, a second fuse and a third fuse;
the lithium power battery subsystem is electrically connected with the first DC-DC converter sequentially through the fifth contactor and the second fuse, and the lithium power battery subsystem is also electrically connected with the first DC-DC converter sequentially through the fifth contactor and the third fuse.
Further: the device also comprises a storage battery;
and the lithium power battery subsystem is electrically connected with the storage battery sequentially through the fifth contactor and the third fuse.
Further: the DC-DC converter also comprises a second DC-DC converter;
the second DC-DC converter is electrically connected to the fuel cell subsystem and the main motor controller, respectively.
Drawings
Fig. 1 is a first schematic structural diagram of a fuel cell-based electric vehicle high-voltage power distribution system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram ii of a fuel cell-based electric vehicle high-voltage power distribution system according to an embodiment of the present invention;
fig. 3 is a third schematic structural diagram of a fuel cell-based electric vehicle high-voltage power distribution system according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
10. the system comprises a main motor controller, 20, a fuel cell subsystem, 30, a lithium power battery subsystem, 40, a pre-charging resistor, 50, an all-in-one controller, 60, a first DC-DC converter, 70, a second DC-DC converter, 80, a storage battery, 501, a first contactor, 502, a second contactor, 503, a third contactor, 504, a fourth contactor, 505, a fifth contactor, 506, a first fuse, 507, a second fuse, 508 and a third fuse.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
The present invention will be described with reference to the accompanying drawings.
First embodiment, as shown in fig. 1, a fuel cell based high voltage power distribution system for an electric vehicle includes a main motor controller 10, a fuel cell subsystem 30, a lithium power battery subsystem 40, an all-in-one controller 50, and a pre-charging resistor 40;
the lithium power battery subsystem 30 is electrically connected with the main motor controller 10 sequentially through the pre-charging resistor 40 and the all-in-one controller 50, the lithium power battery subsystem 30 is also electrically connected with the main motor controller 10 sequentially through the all-in-one controller 50, the lithium power battery subsystem 30 is electrically connected with the fuel battery subsystem 20 sequentially through the pre-charging resistor 40 and the all-in-one controller 50, the lithium power battery subsystem 30 is also electrically connected with the fuel battery subsystem 20 sequentially through the all-in-one controller 50, and the main motor controller 10 is electrically connected with the fuel battery subsystem 20.
The main motor controller is a motor controller MCU, in the electric automobile, the main motor controller MCU has the function of converting the electric energy stored by the power battery into the electric energy required by the driving motor according to the instructions of gears, an accelerator, a brake and the like so as to control the running states of the electric automobile such as starting operation, advancing and retreating speed, climbing force and the like, or help the electric automobile to brake, and store part of brake energy into the power battery, and is one of the key parts of the electric automobile;
the pre-charging resistor is a resistor which is used for charging a load when a capacitive load at the rear end of the circuit is powered on; for an electric automobile, a main motor controller is provided with a larger bus capacitor, and under the condition of cold starting without pre-charging, if a main relay is directly switched on, the high voltage of a battery is directly loaded on the empty bus capacitor, which is equivalent to instantaneous short circuit, and the relay can be damaged by extremely large instantaneous current; after the pre-charging resistor is added, the bus capacitor is pre-charged through the pre-charging loop, so that the current when the main circuit is switched on can be controlled within a safe range, and the normal operation of the system is ensured; the requirements for the pre-charging resistor are small size and large power load.
The whole high-voltage power distribution process comprises the pre-charging of two processes, namely the pre-charging of a main motor controller and the pre-charging of a fuel cell subsystem, which respectively correspond to a first pre-charging state and a second pre-charging state of a pre-charging resistor, and the lithium power cell subsystem is electrically connected with the main motor controller through the pre-charging resistor and an all-in-one controller in sequence; therefore, in the present embodiment, the functions of the modules of the high-voltage distribution system of the fuel cell-based electric vehicle are as follows:
the all-in-one controller is used for controlling the pre-charging resistor to be set to be in a first pre-charging state or a second pre-charging state;
a lithium power battery subsystem for outputting electrical energy to the main motor controller to cause the main motor controller to perform an on-precharge when the precharge resistor is set to the first precharge state;
the lithium power battery subsystem is also used for outputting electric energy to the fuel battery subsystem to enable the fuel battery subsystem to be electrified and precharged when the precharging resistor is set to be in the second precharging state;
the main motor controller is used for receiving the electric energy output by the lithium power battery subsystem for performing power-on pre-charging when the pre-charging resistor is set to be in a first pre-charging state;
and the fuel cell subsystem is used for receiving the electric energy output by the lithium power battery subsystem for performing power-on pre-charging when the pre-charging resistor is set to be in the second pre-charging state.
Therefore, based on the functions of the above modules, in the present embodiment, the operating principle of the fuel cell based high voltage distribution system of the electric vehicle is as follows:
the method comprises the steps that firstly, a main motor controller is precharged, namely when a key of the whole vehicle is turned to 'Start', a key starting instruction is obtained, a precharge resistor is controlled to be set to be in a first precharge state through an all-in-one controller, namely, the whole vehicle starts to charge the main motor controller for precharging, at the moment, a fuel cell subsystem is not started, and power is sourced from a lithium power cell subsystem; when the fuel cell needs to be started, the fuel cell subsystem needs to be pre-charged, after the starting instruction of the fuel cell is obtained, the pre-charging resistor is controlled to be set to be in a second pre-charging state through the all-in-one controller, namely, the whole vehicle is started to be pre-charged to the fuel cell subsystem, and power is sourced from the lithium power cell subsystem.
The utility model discloses an foretell fuel cell based electric automobile high voltage distribution system, can make fuel cell subsystem and main motor controller MCU's pre-filling process share a pre-charge resistance, only need a pre-charge resistance, effectively saved the use of the independent pre-charge resistance of fuel cell subsystem, saved the cost that extra increase pre-charge resistance caused, can realize when accomplishing the pre-charge for main motor controller MCU, can selectively also carry out corresponding pre-charge for the fuel cell subsystem, really accomplish mutual independence of two subsystems, need not to carry out the distribution for fuel cell alone, integrate higher, make things convenient for the arrangement of space in the car;
wherein, the controller that unifies more is the integrated module that relay or switch and resistance are constituteed, and accessible design or change its inside each component's connection structure realize the utility model provides a control pre-charge resistance is set up to the function of first pre-charge state or second pre-charge state, and does not relate to the improvement of computer program, and the switch of control relay or switch, can send closed instruction or disconnection instruction through multiple mode, for example vehicle control unit, or open or close through user's manual, all can realize the first pre-charge state or the second pre-charge state that the pre-charge resistance was controlled through the controller that unifies more is by, also do not relate to the improvement of computer program.
Specifically, in this embodiment, a fuel start instruction may be sent by a vehicle controller, where the vehicle controller is a VCU commonly used in the prior art, a main motor controller is an inverter commonly used in the prior art, a fuel cell subsystem is specifically a hydrogen fuel cell subsystem, and an all-in-one controller is a module in which a plurality of relays and a plurality of resistors are integrated;
the vehicle controller, namely a vehicle controller vcu (vehicle Control unit) of the electric vehicle, is a core component of a vehicle Control system of the electric vehicle, and is a core Control device for controlling the starting, running, advancing and retreating, speed and stopping of a motor of the electric vehicle and other electronic components of the electric vehicle; the VCU, as the most central component of the electric vehicle control system, assumes the tasks of data exchange, security management, driver intent interpretation and energy flow management.
Preferably, as shown in fig. 2, the all-in-one controller 50 includes a first contactor 501 and a second contactor 502;
the lithium power battery subsystem 30 is electrically connected with the main motor controller 10 sequentially through the pre-charging resistor 40 and the first contactor 501, and the lithium power battery subsystem 30 is also electrically connected with the main motor controller 10 through the second contactor 502.
Because the whole high-voltage power distribution process comprises the pre-charging of two processes, namely the power-on pre-charging of the main motor controller and the power-on pre-charging of the fuel cell subsystem, and respectively corresponds to the first pre-charging state and the second pre-charging state of the pre-charging resistor, wherein the corresponding high-voltage power-on process is also included after the power-on pre-charging of the main motor controller is completed, the corresponding high-voltage power-on process is also included after the power-on pre-charging of the fuel cell subsystem is completed, and because the first contactor and the second contactor in the all-in-one controller have the circuit connection relation, in the embodiment, the functions of the first contactor and the second contactor are as follows:
the first contactor is used for receiving a first closing instruction after a key starting instruction is acquired so that the pre-charging resistor is set to be in a first pre-charging state;
the second contactor is used for receiving a second closing instruction when the first pre-charging current of the main motor controller during power-on pre-charging exceeds a first pre-charging current threshold value so as to enable the main motor controller to carry out high-voltage power-on;
the first contactor is further used for receiving a first opening instruction when a first high-voltage current of the main motor controller on high voltage exceeds a first high-voltage current threshold value, so that the pre-charging resistor is set to be in a first open circuit state.
Based on the functions of the first contactor and the second contactor, the operating principle of controlling the pre-charging and the corresponding high-voltage charging of the main motor controller by the all-in-one controller in the embodiment is as follows:
the lithium power battery subsystem, the pre-charging resistor, the first contactor and the main motor controller are conducted in a line mode when a key starting instruction is obtained, and the lithium power battery subsystem and the pre-charging resistor are used for conducting power-on pre-charging on the main motor controller; when the first pre-charging current of the main motor controller during the pre-charging exceeds a first pre-charging current threshold value, the main motor controller is required to be powered on at high voltage, and the lithium power battery subsystem is electrically connected with the main motor controller through the second contactor, so that the second contactor receives a second closing instruction, and the lithium power battery subsystem, the second contactor and the main motor controller are conducted in a line, namely the main motor controller is powered on at high voltage through the lithium power battery subsystem; when the first high-voltage current of the high-voltage power-on of the main motor controller exceeds the first high-voltage current threshold value, the high-voltage power-on of the main motor controller is completed, and the pre-charging resistor does not need to operate, so that the first contactor receives a first disconnection command, the line of the lithium power battery subsystem, the pre-charging resistor, the first contactor and the main motor controller is disconnected, the first pre-charging state of the pre-charging resistor is disconnected, and the pre-charging resistor is set to be in the first disconnection state.
Through the all-in-one controller, the pre-charging and high-voltage charging of the main motor controller can be smoothly completed, and the lithium power battery subsystem can be ensured to continuously supply energy to the main motor controller, so that the smooth operation of the whole vehicle is ensured; wherein, the first pre-charge current threshold value and the first high-voltage current threshold value can be set and adjusted according to actual conditions.
It should be noted that the key start command, the fuel start command, the first close command, the second close command, and the first open command in the present embodiment may be transmitted by the vehicle controller, or may be manually transmitted by the user.
Preferably, as shown in fig. 2, the all-in-one controller 50 further includes a third contactor 503 and a fourth contactor 504;
the lithium power battery subsystem 30 is further electrically connected with the fuel battery subsystem 20 sequentially through the pre-charging resistor 40 and the third contactor 503, and the lithium power battery subsystem 30 is further electrically connected with the fuel battery subsystem 20 through the fourth contactor 504.
Similarly, since the fuel cell subsystem further includes a corresponding high-voltage power-on process after the power-on precharge is completed, and since the third contactor and the fourth contactor in the all-in-one controller have the above circuit connection relationship, in this embodiment, the functions of the third contactor and the fourth contactor are as follows:
the third contactor is used for receiving a third closing instruction after the starting instruction of the fuel cell is obtained so as to enable the pre-charging resistor to be set to be in a second pre-charging state;
the fourth contactor is used for receiving a fourth closing instruction when a second pre-charging current of the fuel cell subsystem during pre-charging exceeds a second pre-charging current threshold value so as to enable the fuel cell subsystem to perform high-voltage power-up;
and the third contactor is also used for receiving a second opening instruction when the second high-voltage current of the high-voltage electrification of the fuel cell subsystem exceeds a second high-voltage current threshold value so as to enable the pre-charging resistor to be set to be in a second open-circuit state.
Based on the functions of the third contactor and the fourth contactor, the operation principle of controlling the pre-charge and the corresponding high-voltage power-up of the fuel cell subsystem by the all-in-one controller in the embodiment is as follows:
the lithium power battery subsystem is electrically connected with the fuel battery subsystem through the pre-charging resistor and the third contactor in sequence, when a fuel battery starting instruction is obtained, namely energy supply of a fuel battery needs to be started, the third contactor receives a third closing instruction, the lithium power battery subsystem, the pre-charging resistor, the third contactor and the fuel battery subsystem are conducted, and the lithium power battery subsystem and the pre-charging resistor are used for pre-charging the fuel battery subsystem; when the second pre-charge current of the pre-charge on the fuel cell subsystem exceeds a second pre-charge current threshold value, the pre-charge on the fuel cell subsystem is completed, and the high-voltage power on needs to be performed on the fuel cell subsystem; when the second high-voltage current of the high-voltage electrification of the fuel cell subsystem exceeds the second high-voltage current threshold value, the high-voltage electrification of the fuel cell subsystem is completed, and the operation of the pre-charging resistor is not needed, so that the third contactor receives a second disconnection instruction, the line of the lithium power cell subsystem, the pre-charging resistor, the third contactor and the fuel cell subsystem is disconnected, the second pre-charging state of the pre-charging resistor is disconnected, and the pre-charging resistor is set to be in a second disconnection state.
Through the all-in-one controller, the pre-charging and the high-voltage power-up of the fuel cell subsystem can be smoothly completed while the pre-charging and the high-voltage power-up of the main motor controller are smoothly completed, the lithium power battery subsystem can be ensured to continuously supply energy to the main motor controller, the fuel cell subsystem can be ensured to continuously supply energy to the main motor controller, the pre-charging of the main motor controller is completed, the corresponding pre-charging can be selectively performed on the fuel cell subsystem, and the pre-charging of the two systems is independent; the pre-charging resistor of the main motor controller is shared with the pre-charging resistor of the fuel cell subsystem, so that the use of the single pre-charging resistor of the fuel cell subsystem is reduced, and the cost caused by additionally increasing the pre-charging resistor is saved; the fuel cell does not need to be independently distributed, so that the integration is higher, and the arrangement of the space in the vehicle is convenient; wherein, the second pre-charge current threshold value and the second high-voltage current threshold value can be set and adjusted according to actual conditions.
It should be noted that the third closing command, the fourth closing command, and the second opening command in this embodiment may be sent by the vehicle controller, or may be sent manually by the user.
Specifically, as shown in fig. 2, the pre-charge resistor in this embodiment is R1, the first contactor is relay K2, the second contactor is relay K1, the third contactor is relay K11, and the fourth contactor is relay K10, and the specification models of the pre-charge resistor and each relay are as follows:
the pre-charging resistor R1 is RX L G100W 150 RJ;
relay K1: HFE18V-200/750-12-HC5 (699);
relay K2 and relay K11: HFE80V-20C/450-12-HTQ2 BJ;
relay K10: HFE18V-150-750-12-HC 6.
Specifically, the high-voltage power distribution system of the fuel cell-based electric vehicle in the embodiment further has the following functions: when the fuel cell subsystem fails, the fourth contactor receives a third open command to reset the pre-charge resistor to the first open state.
In the prior art, part of the fuel cell electric automobile is not provided with corresponding relays and fuses for the fuel cell subsystem, so that the driving of the whole automobile is influenced after the fuel cell subsystem breaks down; in the utility model, before starting the fuel cell subsystem, if the fuel cell subsystem breaks down, the third controller will not receive the third closing instruction, i.e. will not start the fuel cell subsystem, and the pre-charging resistor will continue to be kept in the first open circuit state, i.e. the lithium power battery subsystem supplies energy to the main motor controller directly; when the fuel cell subsystem is started, namely after the fuel cell subsystem supplies power to the main motor, the electric vehicle is in the running process, if the fuel cell subsystem breaks down, the fourth contactor receives a third opening instruction, the third contactor and the fourth contactor are both in the opening state at the moment, the pre-charging resistor is reset to be in the first opening state, namely the loop of the fuel cell subsystem is cut off, the power supply of the fuel cell subsystem to the main motor controller is cut off, and the lithium power battery subsystem returns to the power supply mode of the lithium power battery subsystem to the main motor controller again; by the mode, in the pre-charging, high-voltage charging or running process of the fuel cell subsystem, after the fuel cell subsystem fails, the energy supply of the hydrogen fuel cell can be selectively cut off through the all-in-one controller, and only the lithium power battery subsystem provides power, so that the problem that the whole vehicle cannot run normally due to the failure of the fuel cell subsystem is avoided, and the running safety of the vehicle is ensured; wherein, whether the fuel cell subsystem breaks down realizes by its inside detection circuitry, if break down, can send fault signal for vehicle control unit or inform the user, this part is prior art, not the utility model discloses an invention is important, and concrete details are no longer repeated.
Specifically, in the present embodiment, when the pre-charge resistor R1 is in the first pre-charge state, that is, when the main motor controller is pre-charged, the first contactor K2 is closed, and the second contactor K1, the third contactor K11 and the fourth contactor K10 are all opened; when the main motor controller is electrified at high voltage, the first contactor K2 and the second contactor are closed K1, and the third contactor K11 and the fourth contactor K10 are both opened; when the pre-charging resistor R1 is in a first open-circuit state, namely the main motor controller is electrified at high voltage, the second contactor K1 is closed, and the first contactor K2, the third contactor K11 and the fourth contactor K10 are all opened; when the pre-charging resistor R1 is in the second pre-charging state, namely the fuel cell subsystem is pre-charged, the second contactor K1 and the third contactor K11 are closed, and the first contactor K2 and the fourth contactor K10 are both opened; when the fuel cell subsystem is electrified at high voltage, the second contactor K1, the third contactor K11 and the fourth contactor K10 are closed, and the first contactor K2 is opened; when the pre-charging resistor R1 is in the second open-circuit state, namely the high-voltage electrification of the fuel cell subsystem is completed, the second contactor K1 and the fourth contactor K10 are closed, and the first contactor K2 and the third contactor K11 are both opened.
Preferably, as shown in fig. 2, the all-in-one controller 50 further includes a first fuse 506;
the lithium power battery subsystem 30 is electrically connected to the fuel cell subsystem 20 sequentially through the fourth contactor 504 and the first fuse 506.
The fuse is a current protector which melts a melt by heat generated by the fuse after the current exceeds a specified value for a period of time so as to disconnect a circuit, and is widely used in high-low voltage distribution systems and control systems; in this embodiment, the lithium power battery subsystem is electrically connected to the fuel cell subsystem sequentially through the fourth relay and the first fuse, so that the high-voltage power-on process of the fuel cell subsystem can be protected, and short circuit and overcurrent are prevented.
Specifically, as shown in fig. 2, the all-in-one controller in this embodiment is specifically a module integrating a relay, a fuse, and a resistor, and a first fuse in the all-in-one controller is a fuse F8 in fig. 2.
Preferably, as shown in fig. 2 and 3, a first DC-DC converter 60 is further included;
the first DC-DC converter 60 is electrically connected to the lithium power battery subsystem 30 and the fuel cell subsystem 20, respectively.
Preferably, as shown in fig. 2, the all-in-one controller 50 further includes a fifth contactor 505, a second fuse 507, and a third fuse 508;
the lithium power battery subsystem 30 is electrically connected to the first DC-DC converter 60 through the fifth contactor 505 and the second fuse 507 in this order, and the lithium power battery subsystem 30 is also electrically connected to the first DC-DC converter 60 through the fifth contactor 505 and the third fuse 508 in this order.
The voltage transmitted by the lithium power battery subsystem to the fuel battery subsystem can be converted into the voltage required by the fuel battery subsystem through a first DC-DC converter between the lithium power battery subsystem and the fuel battery subsystem; in the switching process, the fifth contactor and the second fuse 507 can selectively control the switching process and protect the voltage switching process from short circuit and overvoltage.
Specifically, as shown in fig. 2 and 3, the first DC-DC converter in the present embodiment is a 24V DC-DC converter, and as shown in fig. 2, the fifth contactor, the second fuse, and the third fuse in the all-in-one controller, that is, the relay K4, the fuse F4, and the fuse F5 in fig. 2, respectively, are integrated.
Preferably, as shown in fig. 2, a storage battery 80 is further included;
the lithium power battery subsystem 30 is electrically connected to the battery 80 via the fifth contactor 505 and the third fuse 508 in this order.
Through above-mentioned circuit connection structure, can also realize the charging to the battery to make things convenient for reserve.
Specifically, as shown in fig. 2, the battery is a 12V battery in fig. 2.
Preferably, as shown in fig. 2 and 3, a second DC-DC converter 70 is further included;
the second DC-DC converter 70 is electrically connected to the fuel cell subsystem 20 and the main motor controller 10, respectively.
The voltage transmitted by the fuel cell subsystem to the main motor controller may be converted to the voltage required by the main motor controller by a second DC-DC converter between the fuel cell subsystem and the main motor controller.
Specifically, the second DC-DC converter in the present embodiment is a DC-DC booster that can convert the 110V voltage output by the fuel cell subsystem to a 540V high voltage.
Specifically, as shown in fig. 2, the main motor controller in the present embodiment further includes a load, such as an electric air conditioner and an electric heater as in fig. 2; the all-in-one controller further comprises a sixth contactor, a fourth fuse and a fifth fuse, namely a relay K3, a fuse F2 and a fuse F3 in the figure 2 respectively, the lithium power battery subsystem is electrically connected with the electric heater sequentially through a relay K1, a relay K3 and a fuse F3, and the lithium power battery subsystem is electrically connected with the electric air conditioner sequentially through a relay K1 and a fuse F2.
Specifically, the specification models of the relay and the fuse in the present embodiment are as follows:
relay K3: HFE 18V-20/750-12-H2;
the relay K4 is HFE18V-40/750-12-H L5 (634);
fuse F8: JDA07-150A/700 Vdc;
fuse F3, fuse F4, and fuse F5: HBE06-32A/700 VDC;
fuse F2: HBE06-40A/700 VDC.
It should be noted that the above-mentioned K3 and K4 default to an open state after the main motor controller completes high-voltage power-up and/or a closed state after the fuel cell subsystem completes high-voltage power-up.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A high-voltage power distribution system of an electric automobile based on a fuel cell is characterized by comprising a main motor controller (10), a fuel cell subsystem (20), a lithium power battery subsystem (30), an all-in-one controller (50) and a pre-charging resistor (40);
the lithium power battery subsystem (30) sequentially passes through the pre-charging resistor (40) and the all-in-one controller (50) and is electrically connected with the main motor controller (10), the lithium power battery subsystem (30) further passes through the all-in-one controller (50) and is electrically connected with the main motor controller (10), the lithium power battery subsystem (30) sequentially passes through the pre-charging resistor (40) and the all-in-one controller (50) and is electrically connected with the fuel battery subsystem (20), the lithium power battery subsystem (30) further passes through the all-in-one controller (50) and is electrically connected with the fuel battery subsystem (20), and the main motor controller (10) is electrically connected with the fuel battery subsystem (20).
2. The fuel cell-based electric vehicle high voltage power distribution system of claim 1, wherein the all-in-one controller (50) comprises a first contactor (501) and a second contactor (502);
the lithium power battery subsystem (30) is electrically connected with the main motor controller (10) sequentially through the pre-charging resistor (40) and the first contactor (501), and the lithium power battery subsystem (30) is also electrically connected with the main motor controller (10) through the second contactor (502).
3. The fuel cell-based electric vehicle high voltage power distribution system of claim 2, wherein the all-in-one controller (50) further comprises a third contactor (503) and a fourth contactor (504);
the lithium power battery subsystem (30) is electrically connected with the fuel battery subsystem (20) sequentially through the pre-charging resistor (40) and the third contactor (503), and the lithium power battery subsystem (30) is electrically connected with the fuel battery subsystem (20) through the fourth contactor (504).
4. The fuel cell-based electric vehicle high voltage power distribution system of claim 3, wherein the all-in-one controller (50) further comprises a first fuse (506);
the lithium power battery subsystem (30) is electrically connected with the fuel battery subsystem (20) through the fourth contactor (504) and the first fuse (506) in sequence.
5. The fuel cell based electric vehicle high voltage power distribution system of any of claims 1 to 4, further comprising a first DC-DC converter (60);
the first DC-DC converter (60) is electrically connected to the lithium power battery subsystem (30) and the fuel cell subsystem (20), respectively.
6. The fuel cell-based electric vehicle high voltage power distribution system of claim 5, wherein the all-in-one controller (50) further comprises a fifth contactor (505), a second fuse (507), and a third fuse (508);
the lithium power battery subsystem (30) is electrically connected with the first DC-DC converter (60) sequentially through the fifth contactor (505) and the second fuse (507), and the lithium power battery subsystem (30) is also electrically connected with the first DC-DC converter (60) sequentially through the fifth contactor (505) and the third fuse (508).
7. The fuel cell based electric vehicle high voltage power distribution system of claim 6, further comprising a battery (80);
the lithium power battery subsystem (30) is electrically connected with the storage battery (80) through the fifth contactor (505) and the third fuse (508) in sequence.
8. The fuel cell based electric vehicle high voltage power distribution system of claim 1, further comprising a second DC-DC converter (70);
the second DC-DC converter (70) is electrically connected to the fuel cell subsystem (20) and the main motor controller (10), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921433962.0U CN211106992U (en) | 2019-08-30 | 2019-08-30 | High-voltage power distribution system of electric automobile based on fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921433962.0U CN211106992U (en) | 2019-08-30 | 2019-08-30 | High-voltage power distribution system of electric automobile based on fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211106992U true CN211106992U (en) | 2020-07-28 |
Family
ID=71720018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921433962.0U Expired - Fee Related CN211106992U (en) | 2019-08-30 | 2019-08-30 | High-voltage power distribution system of electric automobile based on fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211106992U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112389202A (en) * | 2020-11-06 | 2021-02-23 | 东风襄阳旅行车有限公司 | High-voltage distribution system of fuel cell bus and control method thereof |
-
2019
- 2019-08-30 CN CN201921433962.0U patent/CN211106992U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112389202A (en) * | 2020-11-06 | 2021-02-23 | 东风襄阳旅行车有限公司 | High-voltage distribution system of fuel cell bus and control method thereof |
| CN112389202B (en) * | 2020-11-06 | 2022-07-19 | 东风汽车股份有限公司 | High-voltage distribution system of fuel cell bus and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107554335B (en) | Vehicle-mounted power system and automobile | |
| CN102501770B (en) | Electrical system for pure electric vehicle | |
| CN102299533B (en) | Plug-in Hybrid Electric Vehicle (PHEV) battery management system and control identification method thereof | |
| CN110549867B (en) | Dual-mode automatic switching control method of hydrogen fuel cell vehicle | |
| CN202474949U (en) | Intelligence vehicle high-voltage distribution management unit for electric vehicle | |
| CN111546938B (en) | Vehicle hybrid storage battery management system and method | |
| CN105790374B (en) | A kind of vehicle-mounted storing up electricity case | |
| CN103683476A (en) | Vehicle-mounted comprehensive movable UPS supply device | |
| CN111660871A (en) | Novel power supply system and power supply method of new energy automobile | |
| CN114954046B (en) | V2V charging control method, device and system | |
| CN112659969A (en) | Double-branch power battery control system and method | |
| CN109895759A (en) | A kind of hybrid vehicle and its integrated form controller | |
| CN107658930A (en) | A kind of energy-storage battery | |
| CN211106992U (en) | High-voltage power distribution system of electric automobile based on fuel cell | |
| CN110745022A (en) | A multi-functional controller and new energy automobile for new energy automobile | |
| CN207074883U (en) | A kind of auxiliary source power supply circuit of Portable direct-current input equipment | |
| CN108110855A (en) | A kind of compatible auxiliary source charging system and its charging method | |
| CN115366833B (en) | Redundant power supply controller of mine unmanned vehicle | |
| CN207339344U (en) | A kind of energy-storage battery | |
| CN211567878U (en) | Emergency power supply system for vehicle window of hydrogen energy source vehicle | |
| CN114243824A (en) | Electric automobile power management module, electric automobile and power management method | |
| CN114421587A (en) | Standby power supply, vehicle and control method of vehicle | |
| CN113910936A (en) | Vehicle-mounted charger and control method thereof | |
| CN220842430U (en) | High-voltage integrated controller with power battery distribution function | |
| CN111634247A (en) | Vehicle double-battery energy supply system and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200728 |