CN111823869A - Power supply system and automobile - Google Patents
Power supply system and automobile Download PDFInfo
- Publication number
- CN111823869A CN111823869A CN201910299040.3A CN201910299040A CN111823869A CN 111823869 A CN111823869 A CN 111823869A CN 201910299040 A CN201910299040 A CN 201910299040A CN 111823869 A CN111823869 A CN 111823869A
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- emergency
- control module
- power supply
- switch
- vehicle speed
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- 230000001960 triggered effect Effects 0.000 claims description 8
- 230000005669 field effect Effects 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- IVUGBSGLHRJSSP-UHFFFAOYSA-N LimKi 3 Chemical compound S1C(NC(=O)C(C)C)=NC=C1C1=CC(C(F)F)=NN1C1=C(Cl)C=CC=C1Cl IVUGBSGLHRJSSP-UHFFFAOYSA-N 0.000 description 12
- 238000012423 maintenance Methods 0.000 description 9
- 206010039203 Road traffic accident Diseases 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 206010014357 Electric shock Diseases 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
-
- 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
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a power supply system and an automobile, wherein the power supply system comprises: the power battery pack comprises at least two battery modules connected through a switch module; the emergency control module is connected with the switch module; the emergency trigger switch is connected with the emergency control module; the solar low-voltage power supply device is connected with the emergency control module; the battery management system BMS is connected with the emergency control module and is used for acquiring a collision signal and a current speed signal of the electric automobile and sending the collision signal and the current speed signal to the emergency control module; the emergency control module controls the switch module to be disconnected or connected according to the state of the emergency trigger switch, the collision signal and the current vehicle speed signal. According to the embodiment of the invention, the power battery pack is decomposed by controlling the switch-off of the switch module between the two battery modules, so that the safe high-voltage power-off of the vehicle is realized.
Description
Technical Field
The invention relates to the technical field of power supply of electric automobiles, in particular to a power supply system and an automobile.
Background
Because the electric motor car involves high-tension electricity, when the vehicle broke down or traffic accident, the operation that is out of order in maintenance or emergency rescue process probably caused vehicle trouble, still had the risk that high voltage electrocutes, short circuit etc. cause the explosion to catch fire. For this reason, the emergency maintenance switch is arranged in the battery pack of part of the vehicles, but the emergency maintenance switch is directly connected with the high-voltage power supply, needs the standard operation of professional personnel, and has great risk and limitation; meanwhile, the anode and the cathode of the battery pack are disconnected through the emergency maintenance switch, but the internal short circuit of the battery pack caused by the external force cannot be avoided, so that the fire and explosion are caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a power supply system and an automobile, and solves the problems of high risk of high-voltage power failure and poor safety in emergency treatment of the conventional electric automobile.
According to an aspect of the present invention, there is provided a power supply system applied to an electric vehicle, the power supply system including:
the power battery pack comprises at least two battery modules connected through a switch module;
the emergency control module is connected with the switch module;
the emergency trigger switch is connected with the emergency control module;
the solar low-voltage power supply device is connected with the emergency control module;
the Battery Management System (BMS) is connected with the emergency control module and is used for acquiring a collision signal and a current vehicle speed signal of the electric vehicle and sending the collision signal and the current vehicle speed signal to the emergency control module;
the emergency control module controls the switch module to be disconnected or connected according to the state of the emergency trigger switch, the collision signal and the current vehicle speed signal.
Optionally, the solar low-voltage power supply device includes:
a solar panel;
the charge and discharge controller is connected with the solar cell panel; and
the storage battery is connected with the charge and discharge controller;
the charging and discharging controller is connected with the emergency control module.
Optionally, the switch module is a relay, an Insulated Gate Bipolar Transistor (IGBT), or a metal oxide semiconductor field effect Transistor (MOS).
Optionally, the emergency control module is specifically configured to:
when the BMS is in a wake-up state, monitoring the states of the collision signal, the current vehicle speed signal and the emergency trigger switch, and when the current vehicle speed signal indicates that the current vehicle speed is less than a preset vehicle speed, if any one of the conditions that the collision signal indicates that the electric vehicle is collided and at least one emergency trigger switch is in a trigger state is met, controlling the switch module to be switched off;
and when the current vehicle speed signal indicates that the current vehicle speed is greater than or equal to the preset vehicle speed and the collision signal indicates that the electric vehicle is collided, controlling the switch module to be switched off.
Optionally, the emergency control module is further configured to:
and when the BMS is in an un-awakened state and at least one emergency trigger switch is triggered, controlling the switch module to be switched off.
According to another aspect of the present invention, there is provided an electric vehicle including any one of the power supply systems.
Optionally, the emergency trigger switch is disposed at one or more of a cockpit, a front cabin and a trunk of the electric vehicle.
The embodiment of the invention has the beneficial effects that:
the invention provides a power supply system and an automobile, wherein a switch module is arranged between two battery modules of a power battery pack in the power supply system, and an emergency control module controls the disconnection or connection of the switch module according to the state of an emergency trigger switch, a collision signal and a current speed signal. In the embodiment, the disconnection of the battery module in the power battery pack is realized by controlling the disconnection of the switch module, so that the high-voltage battery is decomposed, the explosion phenomenon caused by the short circuit of the power battery pack is avoided, the safety of high-voltage power failure of the vehicle is improved, and the danger in the process of maintenance or emergency rescue is reduced when the vehicle is maintained, breaks down or has a traffic accident.
Drawings
Fig. 1 shows one of the block diagrams of the configuration of a power supply system of the embodiment of the present invention;
fig. 2 shows a second block diagram of the power supply system according to the embodiment of the invention;
fig. 3 is a structural view showing a solar low voltage power supply apparatus according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a control strategy of the power supply system according to the embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
An embodiment of the present invention provides a power supply system applied to an electric vehicle, as shown in fig. 1, the power supply system includes:
the power battery pack comprises at least two battery modules 1 connected through a switch module 2;
the emergency control module 3 is connected with the switch module 2;
at least one emergency trigger switch 4 connected with the emergency control module 3;
the BMS5 is connected with the emergency control module 3, and the BMS5 is used for acquiring a collision signal and a current speed signal of the electric automobile and sending the collision signal and the current speed signal to the emergency control module 3;
the emergency control module 3 controls the switch module 2 to be disconnected or connected according to the state of the emergency trigger switch 4, the collision signal and the current vehicle speed signal.
In this embodiment, the power battery pack includes a plurality of battery modules 1 connected in series or in parallel, wherein the switch module 2 is disposed between two battery modules 1 connected in series or in parallel. In this embodiment, the switch module 2 is controlled to be turned off, so that at least two battery modules 1 in the power battery pack are turned off, and the power battery pack is disassembled. When the electric automobile is maintained, breaks down or has a traffic accident, high-voltage power failure can be realized, and the phenomenon that the power battery pack explodes due to short circuit is avoided, so that the safety of personnel in the automobile and rescue personnel is ensured.
In this embodiment, the disconnection and connection of the switch module 2 is controlled by the emergency control module 3. The emergency control module 3 acquires the collision signal of the electric vehicle and the current vehicle speed signal through the BMS5, and controls the disconnection or connection of the switch module 2 in combination with the state of the emergency trigger switch 4.
Specifically, the emergency control module 3 is configured to:
when the BMS5 is in the awakening state, monitoring the states of the collision signal, the current vehicle speed signal and the emergency trigger switch 4, and when the current vehicle speed signal indicates that the current vehicle speed is less than the preset vehicle speed, if any condition that the collision signal indicates that the electric vehicle is collided and at least one emergency trigger switch 4 is in the trigger state is met, controlling the switch module 2 to be switched off;
and when the current vehicle speed signal indicates that the current vehicle speed is greater than or equal to the preset vehicle speed and the collision signal indicates that the electric vehicle is collided, controlling the switch module 2 to be switched off.
In this embodiment, the emergency control module 3 monitors the state of the BMS5, and when the BMS5 is in the wake-up state, the collision signal and the current vehicle speed signal are acquired through the BMS5, and it is determined whether the current vehicle speed of the electric vehicle is greater than a preset vehicle speed. When the current vehicle speed is lower than the preset vehicle speed, the state of the emergency trigger switch 4 is acquired, and if the collision signal indicates that the electric vehicle is collided and any condition that at least one emergency trigger switch 4 is in a trigger state is met, the switch module 2 is controlled to be switched off; when the current vehicle speed is greater than or equal to the preset vehicle speed and the collision signal indicates that the electric vehicle is collided, the emergency control module 3 controls the switch module 2 to be switched off.
Specifically, the preset vehicle speed may be 5 km/h. In the embodiment, when the current vehicle speed is less than the preset vehicle speed, the disconnection and connection of the switch module 2 are controlled according to the collision signal and the state of the emergency trigger switch 4, and when the current vehicle speed is greater than or equal to the preset vehicle speed, the disconnection and connection of the switch module 2 are controlled according to the collision signal, so that a high-voltage power supply can be timely disconnected when a vehicle has a traffic accident such as collision and a rescue process, the occurrence of dangers such as explosion, high-voltage electric shock and the like caused by short circuit of the power battery pack is avoided, and the personal safety of the inside of the vehicle and rescue personnel is ensured.
In addition, in this embodiment, when the current vehicle speed is greater than or equal to the preset vehicle speed, the switch module 2 is controlled to be disconnected and connected according to the collision signal, and the state of the emergency trigger switch 4 is not combined, so that unnecessary vehicle accidents caused by triggering of the emergency trigger switch 4 due to misoperation of personnel in the vehicle during the driving process of the vehicle can be effectively avoided, and the driving safety is ensured.
Specifically, the emergency control module 3 is further configured to:
when the BMS5 is in an un-awakened state and at least one emergency trigger switch 4 is triggered, the switch module 2 is controlled to be switched off.
In this embodiment, when the BMS5 is not awake, the emergency control module 3 controls the switch module 2 to be disconnected or connected according to the state of the emergency trigger switch 4, and if the emergency trigger switch 4 is triggered, the switch module 2 is controlled to be disconnected. The embodiment can ensure that the high-voltage power supply of the electric automobile is timely disconnected in the maintenance process, so that dangers such as high-voltage electric shock are avoided, and the personal safety of the automobile and maintenance personnel is ensured.
Specifically, the emergency trigger switch 4 is disposed at one or more of a cockpit, a front cabin and a trunk of the electric vehicle. In this embodiment, a plurality of emergency trigger switches's setting can effectively avoid single inefficacy to easily touch, make things convenient for maintenance personal or rescue personnel to operate.
Preferably, the switch module 2 is a relay, an insulated gate bipolar transistor IGBT, or a metal oxide semiconductor field effect transistor MOS. If the switch module 2 is an MOS transistor or an IGBT, the schematic structural diagram of the power supply system is shown in fig. 1, and if the switch module 2 is a relay, the schematic structural diagram of the power supply system is shown in fig. 2.
As shown in fig. 1 or fig. 2, the power supply system further includes:
and the solar low-voltage power supply device 6 is connected with the emergency control module 3.
In this embodiment, adopt solar energy low pressure power supply unit 6 does emergency control module 3 supplies power, through the mode disconnection of low pressure control the connection between the battery module 1 to make a high voltage power battery package decompose into low voltage battery module, reduced the risk that personnel electrocute, avoided simultaneously because of the exogenic action causes power battery package internal short circuit, the emergence of the explosion accident that initiates a fire.
Specifically, as shown in fig. 3, the solar low-voltage power supply device 6 includes:
a solar cell panel 61;
a charge/discharge controller 62 connected to the solar cell panel 61; and
a battery 63 connected to the charge/discharge controller 62;
the charge and discharge controller 62 is connected with the emergency control module 3.
In this embodiment, the solar panel 61 converts light energy into electric energy, and then the electric energy is converted into 12V or 24V stable direct current by the charge and discharge controller 62 to the storage battery 63 and the emergency control module 3. When the night or the illumination is insufficient, the storage battery 63 directly supplies power to the emergency control module 3 through the charge and discharge controller 62. Therefore, in this embodiment, the emergency control module 3 does not depend on the electric vehicle for power supply, and the emergency control module 3 can work no matter whether the vehicle is started or not, and the emergency control module 3 can still function when the vehicle cannot be started, is not influenced and limited by the vehicle state, and can continuously stay in a working state for a long time.
The control strategy of the power supply system is described in detail below with reference to fig. 4, and as shown in fig. 4, the control strategy of the power supply system includes the following steps:
And step 42, waking up the BMS5, and acquiring a collision signal and a current speed signal of the electric automobile by the emergency control module 3 through the BMS 5.
And 43, controlling the switch module 2 to be switched off when any one of the following conditions is met:
when the current vehicle speed is less than the preset vehicle speed, the vehicle is collided and the emergency trigger switch 4 is triggered;
the current vehicle speed is less than the preset vehicle speed, the vehicle is not collided, and the emergency trigger switch 4 is triggered;
when the current vehicle speed is less than the preset vehicle speed, the vehicle is collided and the emergency trigger switch 4 is not triggered;
when the current vehicle speed is greater than or equal to the preset vehicle speed, the vehicle is collided.
In other states than the above four conditions, the control switch module 2 is kept in the connected state, and step 42 is executed.
Wherein the preset vehicle speed is 5 km/h; the collision signal is 1, representing that the vehicle is collided; the collision signal is 0, indicating that the vehicle has not been collided.
According to the power supply system provided by the embodiment, the disconnection and connection of the battery module 1 in the power battery pack are controlled in a low-voltage control mode according to the triggering state of the emergency trigger switch 4, the collision signal of the vehicle and the current vehicle speed, so that the high-voltage power-off of the electric vehicle is ensured. Control during battery module 1 disconnection in the power battery package, make the power battery package quilt decomposes into low voltage battery module, and this embodiment has improved electric automobile high voltage power failure security, and the probability of the inside short circuit of battery package has been caused because of the exogenic action to the significantly reduced, and easy operation is convenient moreover. The embodiment adopts a low-voltage control mode, so that the high-voltage electric shock risk is avoided, and the operation can be performed by non-professional personnel in emergency. Meanwhile, emergency treatment switches are arranged at multiple positions in the vehicle, so that personnel can operate the emergency treatment switch easily, and single failure can be avoided. In addition, this embodiment combines the trigger state, vehicle collision information and the speed information of emergency trigger switch 4, when can guaranteeing that the vehicle bumps the traffic accident, in time breaks off high voltage power supply, guarantees the inside personnel of vehicle and the safety of rescue personnel, and personnel's maloperation triggers emergency trigger switch 4 in the car when can also avoiding the vehicle to travel simultaneously, arouses unnecessary vehicle accident.
The embodiment of the invention also provides an electric automobile which comprises the power supply system.
The electric automobile that this embodiment provided, including foretell power supply system, according to the triggering state of emergent trigger switch 4, the collision signal and the current speed of a motor vehicle, with low pressure control mode control battery module 1 disconnection and connection in the power battery package to guarantee the security of electric automobile high voltage power failure.
The high-voltage power failure of the power supply system has the following two triggering modes: (1) the manual trigger is generally used for disconnecting a high-voltage power supply during automobile maintenance, detection and test to ensure the operation safety, and the trigger switches are arranged at multiple positions of the automobile to avoid single failure; (2) and collision triggering, namely automatically disconnecting the power supply when the vehicle collides. The power supply system of this embodiment does not rely on the car power supply because of adopting the solar energy power supply mode, and no matter whether the vehicle starts, emergency treatment mechanism homoenergetic works, still can play a role when unable start-up vehicle. In addition, this embodiment combines current speed signal, collision signal and emergent trigger switch's trigger state, judges whether to cut off the power, can prevent that emergent trigger switch from touching by mistake when the vehicle normally travels, leads to the emergence of vehicle accident.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (7)
1. A power supply system is applied to an electric automobile, and is characterized by comprising:
the power battery pack comprises at least two battery modules (1) connected through a switch module (2);
an emergency control module (3) connected with the switch module (2);
at least one emergency trigger switch (4) connected with the emergency control module (3);
the solar low-voltage power supply device (6) is connected with the emergency control module (3); the battery management system BMS (5) is connected with the emergency control module (3), and the BMS (5) is used for acquiring a collision signal and a current speed signal of the electric automobile and sending the collision signal and the current speed signal to the emergency control module (3);
the emergency control module (3) controls the switch module (2) to be disconnected or connected according to the state of the emergency trigger switch (4), the collision signal and the current vehicle speed signal.
2. Power supply system according to claim 1, characterized in that said solar low-voltage power supply device (6) comprises:
a solar cell panel (61);
a charge/discharge controller (62) connected to the solar cell panel (61); and
a battery (63) connected to the charge/discharge controller (62);
the charging and discharging controller (62) is connected with the emergency control module (3).
3. A power supply system according to claim 1, characterized in that the switch module (2) is a relay, an insulated gate bipolar transistor IGBT or a metal oxide semiconductor field effect transistor MOS.
4. The power supply system according to claim 1, characterized in that the emergency control module (3) is particularly configured to:
when the BMS (5) is in an awakening state, monitoring the states of the collision signal, the current vehicle speed signal and the emergency trigger switch (4), and when the current vehicle speed signal indicates that the current vehicle speed is less than a preset vehicle speed, if any one of the conditions that the collision signal indicates that the electric vehicle is collided and at least one emergency trigger switch (4) is in a trigger state is met, controlling the switch module (2) to be switched off;
and when the current vehicle speed signal indicates that the current vehicle speed is greater than or equal to the preset vehicle speed and the collision signal indicates that the electric vehicle is collided, controlling the switch module (2) to be switched off.
5. The power supply system according to claim 4, characterized in that the emergency control module (3) is also configured to:
and when the BMS (5) is in an un-awakened state and at least one emergency trigger switch (4) is triggered, controlling the switch module (2) to be switched off.
6. An electric vehicle characterized by comprising the power supply system according to any one of claims 1 to 5.
7. The electric vehicle according to claim 6, characterized in that the emergency trigger switch (4) is provided at one or more of a cockpit, a front cabin and a trunk of the electric vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910299040.3A CN111823869B (en) | 2019-04-15 | 2019-04-15 | Power supply system and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910299040.3A CN111823869B (en) | 2019-04-15 | 2019-04-15 | Power supply system and automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111823869A true CN111823869A (en) | 2020-10-27 |
| CN111823869B CN111823869B (en) | 2022-07-22 |
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| CN201910299040.3A Active CN111823869B (en) | 2019-04-15 | 2019-04-15 | Power supply system and automobile |
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| CN111823869B (en) | 2022-07-22 |
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