CN114670645A - Battery over-discharge prevention device and vehicle - Google Patents

Battery over-discharge prevention device and vehicle Download PDF

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Publication number
CN114670645A
CN114670645A CN202210493303.6A CN202210493303A CN114670645A CN 114670645 A CN114670645 A CN 114670645A CN 202210493303 A CN202210493303 A CN 202210493303A CN 114670645 A CN114670645 A CN 114670645A
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China
Prior art keywords
vehicle
electric quantity
battery
state
relay
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CN202210493303.6A
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Chinese (zh)
Inventor
马升
王宇
魏冬
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Cool High Tech Beijing Co ltd
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Cool High Tech Beijing Co ltd
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Priority to CN202210493303.6A priority Critical patent/CN114670645A/en
Publication of CN114670645A publication Critical patent/CN114670645A/en
Pending legal-status Critical Current

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    • 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
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/14—Preventing excessive discharging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides a device, a method and a vehicle for preventing over discharge of a battery, wherein a first end of an electromagnetic induction coil of a first relay in the device is connected with an external power supply, a second end of the electromagnetic induction coil is connected with a first interface of a vehicle control unit, a main contact of the first relay is a starting switch of a sleep circuit of a vehicle-mounted battery, a first end of an electromagnetic induction coil of a second relay is connected with the external power supply, a second end of the electromagnetic induction coil of the second relay is connected with a second interface of the vehicle control unit, a main contact of the second relay is a turn-off switch of a vehicle electric appliance, the vehicle control unit can control the vehicle-mounted battery to enter the sleep state and cut off a current loop of the electric appliance by controlling the grounding states of the first interface and the second interface, so that the electric appliance does not consume power any more, and the vehicle-mounted battery is prevented from continuing to discharge under the condition of very low electric quantity fundamentally, causing problems with on-board battery feeding.

Description

Battery over-discharge prevention device and vehicle
Technical Field
The invention relates to the technical field of batteries, in particular to a battery over-discharge prevention device and a vehicle.
Background
Automatic driving has become one of the main research and development directions of the existing automobile, and as one of the most important applications of automatic driving, a low-speed unmanned vehicle has fallen to the ground, and in recent years, the low-speed unmanned vehicle has carried a lot of transportation tasks such as take-out delivery, medicine transportation, and delivery of daily necessities such as vegetables and fruits by virtue of the characteristics of intelligence, flexibility, small occupied space and the like.
At present, battery continuation of the journey is adopted in low-speed unmanned vehicles, the condition that battery voltage is too low can appear in the automatic driving process, and although the automatic driving aspect can also carry out the parking operation when detecting that battery electric quantity is too low, nevertheless after stopping, it is still the open state still probably with electrical apparatus, can cause on-vehicle battery overdischarge this moment.
Disclosure of Invention
In view of this, the embodiment of the invention provides a battery over-discharge prevention device and a vehicle, so as to prevent the over-discharge problem of a vehicle-mounted battery.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a battery anti-over-discharge device comprising:
a vehicle control unit;
the first end of an electromagnetic induction coil of the first relay is connected with an external power supply, the second end of the electromagnetic induction coil of the first relay is connected with a first interface of the vehicle controller, and a main contact of the first relay is a starting switch of a sleep circuit of the vehicle-mounted battery;
and a first end of an electromagnetic induction coil of the second relay is connected with the external power supply, a second end of the electromagnetic induction coil of the second relay is connected with a second interface of the whole vehicle controller, and a main contact of the second relay is a turn-off switch of an electric appliance for the vehicle.
Optionally, the above battery anti-over-discharge device further includes:
and the battery electric quantity indicating circuit is connected with an electric quantity indicating interface of the whole vehicle controller.
Optionally, in the above battery anti-over-discharge device, the battery power indicating circuit includes at least one indicating device;
the first end of each indicating device is connected with an external power supply, and the second end of each indicating device is connected with the indicating interface of the whole vehicle controller in a one-to-one correspondence mode.
Optionally, in the device for preventing over-discharging of a battery, the indicating device in the circuit for indicating battery power includes a first indicator light, a second indicator light and a third indicator light, the first indicator light, the second indicator light and the third indicator light are indicator lights with different colors, the first indicator light is used to be turned on when the vehicle-mounted battery power is not lower than the first-level power value, the second indicator light is used to be turned on when the vehicle-mounted battery power is lower than the first-level power and is greater than or equal to the second-level power value, and the third indicator light is used to be turned on when the vehicle-mounted battery power is lower than the second-level power value.
Optionally, the above battery anti-over-discharge device further includes:
and the warning circuit is connected with a warning signal output interface of the whole vehicle controller.
Optionally, in the above device for preventing over-discharge of a battery, the alarm circuit includes:
and the first end of the warning device is connected with the external power supply, and the second end of the warning device is connected with a warning signal output interface of the whole vehicle controller.
A battery anti-overdischarge method is applied to the battery anti-overdischarge device and comprises the following steps:
acquiring the electric quantity state of a vehicle-mounted battery;
judging whether the electric quantity state of the vehicle-mounted battery is larger than a preset value or not;
and when the electric quantity state of the vehicle-mounted battery is smaller than a preset value, controlling the working state of a starting switch of the dormant circuit and the working state of a turn-off switch of the vehicle electrical appliance by controlling the conduction state of a first interface and a second interface of the vehicle control unit.
Optionally, in the above method for preventing battery from being overdischarged, when the device for preventing battery from being overdischarged is the device for preventing battery from being overdischarged of claim 4, the method further includes:
judging whether the electric quantity state is larger than a first-level electric quantity value or not, and if so, lighting the first indicator lamp through the vehicle control unit;
when the electric quantity state is smaller than the first-level electric quantity value, judging whether the electric quantity state is larger than a second-level electric quantity value;
when the electric quantity state is larger than the second-stage electric quantity value, the second indicator lamp is lightened by the vehicle control unit;
when the electric quantity state is smaller than the second-level electric quantity value, judging whether the electric quantity state is larger than a third-level electric quantity value;
when the electric quantity state is greater than the third-level electric quantity value, the third indicator lamp is lightened through the vehicle control unit, and when the electric quantity state is less than the third-level electric quantity value, the action is executed: and judging whether the electric quantity state of the vehicle-mounted battery is greater than a preset value.
Optionally, in the method for preventing over-discharge of a battery, when the electric quantity state of the vehicle-mounted battery is smaller than a preset value, the method further includes:
and judging whether the vehicle is in a starting state, and if not, controlling the wireless communication module to send preset prompt information to a pre-stored target terminal.
An automobile, comprising: the vehicle-mounted battery is at least used for providing working power supply for the vehicle-mounted electrical appliances, and is characterized in that any one of the battery over-discharge prevention devices is also applied;
the vehicle controller is also used for controlling the working states of a plurality of electric appliances of the vehicle;
at least one vehicle electrical appliance in the vehicle electrical appliances uses the main contact of the second relay as a turn-off switch.
Based on the above technical solution, in the above technical solution provided in the embodiment of the present invention, a first end of an electromagnetic induction coil of a first relay is connected to an external power supply, a second end of the electromagnetic induction coil is connected to a first interface of the vehicle controller, a main contact of the first relay is a start switch of a sleep circuit of the vehicle-mounted battery, a first end of an electromagnetic induction coil of a second relay is connected to the external power supply, a second end of the electromagnetic induction coil of the second relay is connected to a second interface of the vehicle controller, a main contact of the second relay is an off switch of an electrical appliance of the vehicle, the vehicle controller may control a ground state of the first interface and the second interface, so as to control whether main contacts of the first relay and the second relay act, for example, when it is detected that an electrical quantity state of the vehicle-mounted battery is lower than a preset electrical quantity value, the first interface and the second interface are controlled to be grounded, so that the main contacts of the first relay and the second relay act, the vehicle-mounted battery enters a dormant state, a current loop of the electrical appliance is cut off, the electrical appliance does not consume power any more, and the problem of vehicle-mounted battery feed caused by continuous discharge of the vehicle-mounted battery under the condition of low electric quantity is fundamentally prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a battery anti-overdischarge apparatus disclosed in an embodiment of the present application;
fig. 2 is a schematic flow chart of a method for preventing over-discharge of a battery disclosed in an embodiment of the present application;
FIG. 3 is a schematic view of a battery anti-over-discharge device according to another embodiment of the present disclosure;
FIG. 4 is a schematic flow chart illustrating a method for preventing over-discharge of a battery according to another embodiment of the present disclosure;
FIG. 5 is a schematic view of a battery anti-over-discharge device according to another embodiment of the present disclosure;
FIG. 6 is a schematic view of a battery anti-over-discharge device according to another embodiment of the present disclosure;
fig. 7 is a schematic flow chart of a method for preventing over-discharge of a battery according to another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When the unmanned vehicle is intelligently driven to go out to execute distribution tasks, the battery voltage is too low, although the automatic driving system can adopt some measures for reducing the power consumption (such as the parameters are zero in driving operation, an unmanned vehicle lamp light system is turned off and the like), a part of electric appliances (such as chassis electric appliances) of the unmanned vehicle still work, if the working time is longer, the vehicle-mounted battery is over-discharged, and the vehicle-mounted battery is under-voltage; similarly, when the unmanned vehicle finishes the distribution task and returns to the original place or an operator debugs the unmanned vehicle, the situation that the power supply switch of the unmanned vehicle is forgotten to be turned off may occur, and at the moment, the problem of over-discharge of the battery is also caused. After the battery is over-discharged, the battery is damaged, so that the condition that the battery cannot be charged is caused, the normal use of the low-speed unmanned vehicle is influenced, and the vehicle-mounted battery needs to be replaced, thereby bringing unnecessary economic loss.
This application mainly is to unmanned car battery overdischarge problem provides, through preventing on-vehicle battery overdischarge to guarantee on-vehicle battery's normal use, reduce or avoid unnecessary economic loss.
Specifically, referring to fig. 1, in the present application, an embodiment of the disclosure discloses a device for preventing over-discharge of a battery, in this scheme, a first relay 200 and a second relay 300 are provided, a main contact of the first relay 200 is provided in a main loop of a vehicle-mounted battery, a main contact of the second relay 300 is provided in a main loop of an electrical appliance, one end of a magnetic induction coil of the first relay 200 and the second relay 300 is connected to a corresponding interface of a vehicle controller 100, the other end of the magnetic induction coil of the first relay 200 and the other end of the magnetic induction coil of the second relay 300 are connected to an external power source, the vehicle controller 100 can trigger the power-on condition of the magnetic induction coil of the first relay 200 and the magnetic induction coil of the second relay 300, so as to trigger the corresponding main contact, and the power-on and power-off conditions of the vehicle-mounted battery and the electrical appliance are controlled by the pull-in state of the main contacts, so as to turn off the electrical appliance, the vehicle-mounted battery is prevented from being over-discharged.
Specifically, referring to fig. 1, the present application discloses a battery anti-overdischarge apparatus, which may include: the vehicle control unit 100, the first relay 200 and the second relay 300.
The vehicle control unit 100 may be an on-board computer ECU.
A first end of an electromagnetic induction coil of the first relay 200 is connected to an external power supply, a second end of the electromagnetic induction coil of the first relay is connected to a first interface of the vehicle controller 100, a main contact of the first relay 200 is disposed in a sleep circuit of the vehicle-mounted battery, and a configuration rule of the main contact of the first relay 200 is as follows: when the main contact of the first relay 200 is triggered, the sleep circuit of the vehicle-mounted battery is started, and the sleep circuit enters an operating state, for example, the main contact of the first relay 200 is disposed in a main loop of the sleep circuit of the vehicle-mounted battery, the main contact of the first relay 200 may be used as a start switch of the sleep circuit of the vehicle-mounted battery, and of course, the main contact of the first relay 200 may also be disposed in other loops of the sleep circuit, as long as the main contact of the first relay 200 is ensured to be able to start the sleep circuit after being actuated. When the magnetic induction coil of the first relay 200 is grounded through the first interface of the vehicle control unit 100 or at a low potential, the current output by the external power source flows through the electromagnetic induction coil of the first relay 200, at this time, the electromagnetic induction coil generates an induction magnetic field to drive the main contact of the first relay 200 to act, and after the main contact of the first relay 200 acts, the sleep circuit of the vehicle-mounted battery is started to act, so that the vehicle-mounted battery enters a sleep state through the sleep circuit.
A second relay 300, a first end of an electromagnetic induction coil of the second relay 300 is connected to the external power supply, a second end of the electromagnetic induction coil of the second relay 300 is connected to a second interface of the vehicle controller 100, and a configuration rule of a main contact of the second relay 300 is as follows: when the main contacts of the second relay 300 are activated, the second relay 300 is de-energized. In this scheme, the main contact of the second relay is used as a turn-off switch of the vehicle electrical equipment, for example, the main contact of the second relay may be disposed in a main loop of the vehicle electrical equipment, or may be disposed in other loops, as long as the main contact is ensured to be able to turn off the electrical equipment after acting. Specifically, when the magnetic induction coil of the second relay 300 is grounded through the second interface of the vehicle control unit 100 or at a low potential, the current output by the external power source flows through the electromagnetic induction coil of the second relay 300, at this time, the electromagnetic induction coil generates an induction magnetic field to drive the main contact of the second relay 300 to move, and when the main contact of the second relay 300 moves, the electrical appliance is powered off and stops working, and the electrical appliance cannot continue to consume power.
In the technical solution disclosed in the present application, the vehicle control unit 100 may monitor the electric quantity state of the vehicle-mounted battery in real time, compare the electric quantity state of the vehicle-mounted battery with a preset electric quantity value through a built-in comparison module, and then control the grounding state or the low potential state of the first interface and the second interface according to the comparison result, so as to control whether current flows through the magnetic induction coils of the first relay 200 and the second relay 300, and control whether the main contacts of the first relay 200 and the second relay 300 operate or not based on the current condition in the magnetic induction coils, for example, when the electric quantity state of the vehicle-mounted battery is detected to be lower than the preset electric quantity value, control the first interface and the second interface of the vehicle control unit 100 to be grounded or low potential, so that the main contacts of the first relay 200 and the second relay 300 operate under the action of the magnetic field of the magnetic induction coils, therefore, the vehicle-mounted battery enters a dormant state, and a current loop of the electrical appliance is cut off, so that the electrical appliance does not consume electricity any more, the problem of vehicle-mounted battery feed caused by continuous discharge of the vehicle-mounted battery under the condition of low electric quantity is fundamentally prevented, the vehicle-mounted battery cannot be permanently damaged due to feed, the service life of the vehicle-mounted battery is prolonged, and unnecessary economic loss caused by replacement of the damaged battery is avoided.
Further, the above-mentioned scheme that this application discloses still prevents the overdischarge control through adopting above-mentioned battery to prevent the device to on-vehicle battery for the vehicle is in the state that can start always through preventing the overdischarge control, has reduced the condition that the vehicle can't be started because of the battery feed, needs to change the battery, and the user is when using the vehicle, and the vehicle can in time start, has improved the availability factor of vehicle.
Corresponding to the above structure, the embodiment also discloses a specific method for preventing the over-discharge of the battery, which may be applied to the vehicle control unit 100, and specifically, referring to fig. 2, the method disclosed in the embodiment of the present application includes:
step S101: and acquiring the electric quantity state of the vehicle-mounted battery.
In the scheme, the electric quantity state of the vehicle-mounted battery can be acquired in real time through the vehicle-mounted battery management system, and the residual electric quantity of the vehicle-mounted battery can be determined through the electric quantity state, wherein the vehicle-mounted battery management system is an existing system and can realize electric quantity management on the vehicle-mounted battery, and the electric quantity state of the vehicle-mounted battery can be acquired through the system.
Step S102: and judging whether the electric quantity state of the vehicle-mounted battery is greater than a preset value.
In the scheme, an electric quantity lower limit value is preset, the size of the electric quantity lower limit value can be flexibly adjusted according to user requirements, the electric quantity lower limit value is recorded as the preset value, when the electric quantity state of the vehicle-mounted battery is detected to be smaller than the preset value, the fact that the vehicle-mounted battery is about to enter an over-discharge state is indicated, and at the moment, electric appliances in a vehicle need to be turned off.
Step S103: when the electric quantity state of the vehicle-mounted battery is smaller than a preset value, by controlling the grounding state or the low potential state of the first interface and the second interface of the vehicle controller 100, current flows through the magnetic induction coils of the first relay and the second relay, and a main contact of the relay is triggered by a magnetic field generated by the magnetic induction coils to control the start of the sleep circuit and control the power-off of the vehicle electrical appliance.
Specifically, in this scheme, when it is detected that the electric quantity state of the vehicle-mounted battery is smaller than a preset value, the first interface and the second interface of the vehicle controller 100 may be controlled to be grounded or at a low potential, so that a current path is formed between an external power supply and an electromagnetic induction coil and a ground, so that current flows through the electromagnetic induction coil, and further, under the action of a magnetic field generated by the electromagnetic induction coil, the main contacts of the first relay 200 and the second relay 300 are operated, so that the sleep circuit of the vehicle-mounted battery operates, and the main circuit of the electrical appliance is powered off.
In a technical solution disclosed in another embodiment of the present application, before detecting that the electric quantity value of the vehicle-mounted battery is smaller than the preset value, the electric quantity indicating circuit may be adopted to display the electric quantity state of the vehicle-mounted battery, so that a user can know the electric quantity state of the vehicle-mounted battery in real time, and then make a corresponding countermeasure in time, therefore, the device for preventing over-discharging of a battery provided in the above embodiment of the present application may further include the battery electric quantity indicating circuit, the battery electric quantity indicating circuit is connected with the electric quantity indicating interface of the vehicle controller 100, and an indicating signal for representing the electric quantity state of the vehicle-mounted battery is acquired through the electric quantity indicating interface of the vehicle controller 100, and corresponding actions are executed based on the indicating signal. Specifically, a first end of the battery power indication circuit may be connected to the external power source, and a second end of the battery power indication circuit may be connected to a power indication interface of the vehicle controller 100, when the power indication interface of the vehicle controller 100 is grounded, an indication device in the battery power indication circuit is switched to a corresponding working state, and a user may know a power condition of the vehicle-mounted battery through the working state of the indication device, and if the indication device is triggered, it indicates that the power of the vehicle-mounted battery is sufficient, otherwise, it indicates that the power of the vehicle-mounted battery is low. Therefore, the vehicle control unit 100 can control the operating state of the relevant indicating device in the battery power indicating circuit, and the power state of the vehicle-mounted battery is represented by the operating state of the indicating device, so that the power state of the vehicle-mounted battery is better shown to a user, and the user can make a coping strategy.
In the technical solution disclosed in the embodiment of the present application, the battery power indication circuit may use the power indication interface as a control interface, or may use the power indication interface as a current loop of the battery power indication circuit. For example, when the interface is used as a control interface of a battery power indication circuit, the power indication interface may control an operating state of the battery power indication circuit by outputting a high level and a low level, specifically, when the indication device does not need to be triggered, the power indication interface outputs a low level signal, under the control of the low level signal, the battery power indication circuit does not trigger the indication device, when the indication device needs to be triggered, the power indication interface outputs a high level signal, under the control of the high level signal, the battery power indication circuit triggers the indication device, and the indication device prompts power to a user. When the power indication interface is used as a current loop, the power indication interface is used to provide a ground node or a high-level node to the battery power indication circuit, and the controller 100 can control the operating state of the battery power indication circuit by controlling the ground state (when another end of the battery power indication circuit is connected to the power source) or the high-level (when another end of the battery power indication circuit is connected to the ground) of the power indication interface, specifically, when the power indication interface is used as a ground node, and when the indication device needs to be triggered, the controller controls the ground of the power indication interface, which is equivalent to the power indication interface serving as a battery power indication circuit ground node, to provide a complete current loop for the battery power indication circuit, and the indication device is triggered, if the indicating device does not need to be triggered, the controller controls the electric quantity indicating interface to be suspended, at the moment, the battery electric quantity indicating circuit cannot form a complete current loop due to the lack of the grounding node, and the indicating device cannot be triggered. When the electric quantity indicating interface is used as a high-level node, when the indicating device needs to be triggered, the controller controls the high level of the electric quantity indicating interface, the electric quantity indicating interface is equivalent to be used as a power supply port of a battery electric quantity indicating circuit at the moment so as to provide a complete current loop for the battery electric quantity indicating circuit, the indicating device can be triggered, if the indicating device does not need to be triggered, the controller controls the electric quantity indicating interface to be suspended, at the moment, the battery electric quantity indicating circuit cannot form the complete current loop due to the lack of the power supply port, and the indicating device cannot be triggered.
In the technical scheme disclosed by the embodiment, the electric quantity state of the vehicle-mounted battery is displayed to a user through the electric quantity indicating circuit, so that the user can be helped to make a better coping strategy.
In the technical solution disclosed in this embodiment, in order to more finely show the electric quantity state of the vehicle-mounted battery to a user, the number of the indicating devices in the battery electric quantity indicating circuit may be set according to design requirements, each indicating device corresponds to one electric quantity indicating interface of the vehicle controller 100, for example, the number of the indicating devices is at least 1, for example, N may be any number value such as 1, 2, 3, 4, and the number of the electric quantity indicating interfaces is also N. The vehicle control unit 100 may trigger a corresponding indication device through a corresponding electric quantity indication interface according to the value of the electric quantity of the vehicle-mounted battery. For example, a first indicator of the N indicating devices is triggered when the remaining capacity of the vehicle-mounted battery is in the range a, a second indicator of the N indicating devices is triggered when the remaining capacity of the vehicle-mounted battery is in the range B, a third indicator of the N indicating devices is triggered when the remaining capacity of the vehicle-mounted battery is in the range C, and a fourth indicator of the N indicating devices is triggered when the remaining capacity of the vehicle-mounted battery is in the range D. According to the scheme, the battery power indicating circuit is provided with the plurality of indicating devices, and each indicating device is used for indicating the corresponding residual power range of the vehicle-mounted battery, so that a user can know the residual power value of the vehicle-mounted battery more accurately.
In the following, for convenience of introduction of the scheme, the scheme is introduced in a case where the electric quantity indication interfaces are used as current loops, at this time, a first end of each indication device is connected to an external power source, a second end of each indication device is respectively connected to the electric quantity indication interfaces corresponding to the vehicle controller 100 in a one-to-one correspondence manner, a ground state of each electric quantity indication interface is controllable, and directional control of the corresponding indication device can be achieved by controlling the ground state of each electric quantity indication interface, that is, the working state of the indication device connected to the electric quantity indication interface can be controlled by controlling the ground state of a certain electric quantity indication interface of the vehicle controller 100, specifically, when the vehicle controller 100 controls the electric quantity indication interface to be grounded, the external power source, the indication device and the electric quantity indication interface form a current loop, the indication device is triggered, and the indication device enters the working state, the user can judge that the electric quantity of the vehicle-mounted battery is in the electric quantity range corresponding to the indicating device through the indicating device.
Referring to fig. 3, in order to provide a user with a clear indication, in the technical solution disclosed in this embodiment, the indicator may be an indicator, for example, in this solution, the power indicator circuit may include 3 indicator lamps (each indicator lamp serves as an indicator), that is, the three indicator lamps are a first indicator lamp, a second indicator lamp and a third indicator lamp, respectively, the first indicator lamp is configured to be turned on when the vehicle-mounted battery power is greater than or equal to the first-level power value, the second indicator lamp is configured to be turned on when the vehicle-mounted battery power is lower than the first-level power value and greater than the second-level power value, and the third indicator lamp is configured to be turned on when the vehicle-mounted battery power is lower than the second-level power value. The first indicator light, the second indicator light and the third indicator light can be three indicator lights with different colors, for example, the colors of the first indicator light, the second indicator light and the third indicator light are green, yellow and red respectively. Or the positions or the shapes of the first indicator light, the second indicator light and the third indicator light are different, and a user can determine the residual electric quantity of the vehicle-mounted battery by looking up the colors, the positions or the shapes of the first indicator light, the second indicator light and the third indicator light of the electric quantity. In this scheme, adopt the pilot lamp as indicating device, when the residual capacity of on-vehicle battery was in different electric quantity scopes, the pilot lamp that the electric quantity is different to carry out obvious electric quantity suggestion for the user, thereby make the user can know the residual capacity of on-vehicle battery the very first time.
In the technical solution disclosed in the embodiment of the present application, a specific control strategy for the first indicator light, the second indicator light, and the third indicator light is further disclosed, and the strategy is applied to the vehicle control unit 100, specifically, referring to fig. 4, and the strategy may include:
step S201: and acquiring the electric quantity state of the vehicle-mounted battery.
Step S202: and judging whether the electric quantity state is larger than a first-level electric quantity value or not.
In this scheme, the electric quantity value of the vehicle-mounted battery may be divided into a first-stage electric quantity value, a second-stage electric quantity value and a third-stage electric quantity value in advance, and specific values of the electric quantity values of the respective stages may be set according to user requirements, for example, the first electric quantity value may be 80% of the electric quantity value in the full electric state of the vehicle-mounted battery, the second electric quantity value may be 30% of the electric quantity value in the full electric state of the vehicle-mounted battery, the third electric quantity value may be 20% of the electric quantity value in the full electric state of the vehicle-mounted battery, and in the above, the preset value for triggering the first relay 200 and the second relay 300 may be set to be 10% of the electric quantity value in the full electric state of the vehicle-mounted battery.
Step S203: and when the electric quantity state is greater than the first-level electric quantity value, controlling a first indicator lamp to be lightened.
In this step, when it is detected that the electric quantity state of the vehicle-mounted battery is greater than the first-level electric quantity value, it is indicated that the electric quantity of the vehicle-mounted battery is sufficient, the first indicator lamp is turned on by controlling the electric quantity indication interface corresponding to the first indicator lamp to be grounded, and a user can determine that the electric quantity of the vehicle-mounted battery is in a sufficient state through the first indicator lamp.
Step S204: and when the electric quantity state is smaller than the first-level electric quantity value, judging whether the electric quantity state is larger than a second-level electric quantity value.
When the electric quantity state is smaller than the first-level electric quantity value, the electric quantity state indicates that a part of the electric quantity of the vehicle-mounted battery is consumed, and whether the electric quantity of the vehicle-mounted battery is larger than a next standard value or not needs to be judged, namely whether the electric quantity state is larger than a second-level electric quantity value or not.
Step S205: and when the electric quantity state is greater than the second-stage electric quantity value, controlling a second indicator lamp to be lightened.
When the electric quantity state is larger than the second-level electric quantity value, the fact that a part of electric quantity of the vehicle-mounted battery is consumed is indicated, but the vehicle-mounted battery still has enough electric quantity, at the moment, the second indicating lamp is lightened by controlling the electric quantity indicating interface corresponding to the second indicating lamp to be grounded.
Step S206: and when the electric quantity state is smaller than the second-level electric quantity value, judging whether the electric quantity state is larger than a third-level electric quantity value.
And when the electric quantity state is smaller than the second-level electric quantity value, the fact that most of the electric quantity of the vehicle-mounted battery is consumed is shown, the residual electric quantity is low, and whether the electric quantity of the vehicle-mounted battery is larger than a next standard value or not is continuously judged, namely whether the electric quantity of the vehicle-mounted battery is larger than a third-level electric quantity value or not is judged.
Step S207: and when the electric quantity state is greater than the third-level electric quantity value, controlling a third indicator lamp to be lightened, and when the electric quantity state is less than the third-level electric quantity value, executing the step S102 to judge whether the electric quantity state is greater than a preset value.
When the electric quantity state is larger than the third-level electric quantity value, the fact that most of electric quantity of the vehicle-mounted battery is consumed is indicated, but the vehicle-mounted battery still has electric quantity capable of supporting normal running of a vehicle, and at the moment, the third indicator lamp is lightened by controlling the electric quantity indicating interface corresponding to the third indicator lamp to be grounded.
In this step, when the electric quantity of the battery is between the third-level electric quantity value and the preset value, it is indicated that the vehicle-mounted battery still has some electric quantity to support an operator to control the vehicle to return in the low-speed running state of the vehicle, if the electric quantity value of the vehicle-mounted battery is smaller than the preset value, it is indicated that the electric quantity of the vehicle-mounted battery is in the extremely low state, at this moment, in order to prevent the vehicle-mounted battery from over-discharging, relays of electric appliances are required to be disconnected, then a battery wake-up switch is disconnected, the vehicle-mounted battery is in the dormant state, so that a user is prompted that the electric quantity of the vehicle-mounted battery is in the extremely low state, and the vehicle-mounted battery needs to be charged as soon as possible. Through the above strategy, based on the residual capacity of the vehicle-mounted battery, the corresponding indicator lamp is controlled to work, and the user can know the electric quantity state of the vehicle-mounted battery accurately. Referring to fig. 5, in the technical solution disclosed in another embodiment of the present application, in order to issue a more significant reminder to a user when the battery power is low, in the above solution, an alarm circuit may be further included, and the alarm circuit is connected to an alarm signal output interface of the vehicle control unit 100. Similarly, the alarm signal output interface can also be used as a control signal interface of the alarm circuit or a current loop. The controller can control the action of the alarm circuit or not by controlling the level state of the alarm signal output interface.
In a technical solution disclosed in another embodiment of the present application, an action state of the warning circuit may be consistent with an indicator lamp (for example, a third indicator lamp) in the battery power indication circuit or a working state of the relay, that is, the vehicle control unit 100 controls the warning circuit to perform a warning action while controlling the third indicator lamp to be turned on or controlling the relay action, so that when the vehicle-mounted battery power is extremely low, a more obvious prompt is provided to a user.
Similar to the above battery power indication circuit, when the alarm signal output interface is used as a current loop of the alarm circuit, the first end of the alarm circuit is connected to the external power source, and the second end of the alarm circuit is connected to the alarm signal output interface of the vehicle control unit 100, at this time, the alarm circuit may be formed by only one alarm device, the first end of the alarm device is used as the first end of the alarm circuit, and the second end of the alarm device is used as the second end of the alarm circuit. The type of the warning device can be selected according to the requirements of a user, in the scheme, the warning device can be a buzzer or other audio output equipment, and at the moment, when the warning device works, a more vivid prompt can be sent to the user.
Referring to fig. 6, in a technical solution disclosed in another embodiment of the present application, since an operation state of the alarm circuit may be consistent with an operation state of an indicator lamp in the battery power indication circuit, the alarm signal output interface may be one of N power indication interfaces of the vehicle control unit 100, for example, may be a power indication interface corresponding to the third indicator lamp, where when the power indication interface corresponding to the third indicator lamp is grounded, the alarm signal output interface is equivalently grounded, and when the third indicator lamp operates, the alarm device also operates.
In the above solution disclosed in another embodiment of the present application, the external power supply of each power module in the battery anti-overdischarge device may be a single power supply, that is, an off-board power supply thereof, and the external power supply may also be a constituent structure of the battery anti-overdischarge device, that is, the battery anti-overdischarge device may further include an external power supply, and the external power supply is configured to supply power to the power module in the battery anti-overdischarge device, so that the battery anti-overdischarge device may also operate normally in a state where the on-board battery is dormant.
In the technical scheme disclosed by the embodiment of the application, the warning circuit and the battery electric quantity indicating circuit can be arranged in an instrument panel of a vehicle.
In the technical scheme disclosed in another embodiment of the present application, if the electric quantity of the battery is too low (the condition of the action of the warning circuit) occurs in the unmanned automatic driving process of the vehicle, or the vehicle is parked for a long time, and the electric quantity of the vehicle-mounted battery is too low, if the driver is not on the vehicle, in order to enable the driver to know the electric quantity condition of the vehicle-mounted battery in time, in the above scheme, the wireless communication module can further comprise a wireless communication module, the wireless communication module is synchronously triggered with the warning circuit, and is used for sending preset prompting information to the pre-stored target terminal, and the prompting information is used for prompting the user that the electric quantity of the vehicle-mounted battery is extremely low to continue charging. The target terminal can be a mobile phone, a computer or a specific electronic account of the user, such as a contact mode reserved for the user, such as a micro signal, a QQ number, a mobile phone number and the like.
In another embodiment of the present disclosure, before sending a preset prompt message to a pre-stored target terminal through a wireless communication module, it may be determined in advance whether a user is on a vehicle, when the user is on the vehicle, the preset prompt message does not need to be sent to the pre-stored target terminal through the wireless communication module, when it is determined whether the user is on the vehicle, the determination may be performed by determining a landing state of the vehicle, and certainly, the detection may be performed by using a camera or other sensing devices in the vehicle, in this scheme, it is preferable to determine whether the user is in the vehicle through the landing state of the vehicle, at this time, referring to fig. 7, after controlling a first interface and a second interface of the vehicle controller to be grounded, the method may further include:
step S301: and judging whether the vehicle is in a starting state, if so, executing the step S302, otherwise, ending the process.
Step S302: and controlling the wireless communication module to send preset prompt information to a pre-stored target terminal.
Corresponding to the scheme, the application also discloses an automobile, a plurality of vehicle electrical appliances and an on-board battery, wherein the on-board battery is at least used for providing working power supply for the plurality of vehicle electrical appliances, the automobile is also provided with the battery over-discharge prevention device in any one of the embodiments, and in the embodiment, the whole automobile controller is also used for controlling the working states of the plurality of vehicle electrical appliances; at least one vehicle electrical appliance in the vehicle electrical appliances uses the main contact of the second relay as a turn-off switch. In this scheme, the vehicle-mounted battery provides a working power supply for the plurality of vehicle electrical appliances, the vehicle control unit controls the working states of the plurality of vehicle electrical appliances based on a built-in control strategy, and meanwhile, the vehicle control unit can also control the sleep state of the vehicle-mounted battery and the power-on state of the vehicle electrical appliances taking the main contact of the second relay as a turn-off switch through the first relay and the second relay, and when the vehicle control unit controls the sleep state of the vehicle-mounted battery and the power-on state of the vehicle electrical appliances, the control strategy provided in each method embodiment of the present application can be specifically adopted.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An over-discharge prevention device for a battery, comprising:
a vehicle control unit;
the first end of an electromagnetic induction coil of the first relay is connected with an external power supply, the second end of the electromagnetic induction coil of the first relay is connected with a first interface of the vehicle controller, and a main contact of the first relay is a starting switch of a sleep circuit of the vehicle-mounted battery;
and a first end of an electromagnetic induction coil of the second relay is connected with the external power supply, a second end of the electromagnetic induction coil of the second relay is connected with a second interface of the whole vehicle controller, and a main contact of the second relay is a turn-off switch of an electric appliance for the vehicle.
2. The battery anti-over-discharge device according to claim 1, further comprising:
and the battery electric quantity indicating circuit is connected with an electric quantity indicating interface of the whole vehicle controller.
3. The battery anti-over-discharge device according to claim 2, wherein the battery level indicating circuit comprises at least one indicating device;
the first end of each indicating device is connected with an external power supply, and the second end of each indicating device is connected with the indicating interface of the whole vehicle controller in a one-to-one correspondence mode.
4. The device of claim 3, wherein the indicator of the battery level indicating circuit comprises a first indicator light, a second indicator light and a third indicator light, the first indicator light, the second indicator light and the third indicator light are different color indicator lights, the first indicator light is used for being lighted when the vehicle battery level is not lower than a first level power value, the second indicator light is used for being lighted when the vehicle battery level is lower than the first level power value and is greater than or equal to a second level power value, and the third indicator light is used for being lighted when the vehicle battery level is lower than the second level power value.
5. The battery anti-over-discharge device according to claim 3, further comprising:
and the warning circuit is connected with a warning signal output interface of the whole vehicle controller.
6. The battery anti-over-discharge device according to claim 5, wherein the alarm circuit comprises:
and the first end of the warning device is connected with the external power supply, and the second end of the warning device is connected with a warning signal output interface of the whole vehicle controller.
7. A battery anti-overdischarge method applied to the battery anti-overdischarge apparatus according to any one of claims 1 to 6, the method comprising:
acquiring the electric quantity state of a vehicle-mounted battery;
judging whether the electric quantity state of the vehicle-mounted battery is larger than a preset value or not;
and when the electric quantity state of the vehicle-mounted battery is smaller than a preset value, controlling the working state of a starting switch of the dormant circuit and the working state of a turn-off switch of the vehicle electrical appliance by controlling the conduction state of a first interface and a second interface of the vehicle control unit.
8. The battery anti-overdischarge method according to claim 7, wherein when the battery anti-overdischarge apparatus is the battery anti-overdischarge apparatus according to claim 4, the method further comprises:
judging whether the electric quantity state is larger than a first-level electric quantity value or not, and if so, lightening the first indicator lamp through the vehicle controller;
when the electric quantity state is smaller than a first-level electric quantity value, judging whether the electric quantity state is larger than a second-level electric quantity value;
when the electric quantity state is larger than the second-stage electric quantity value, the second indicator lamp is lightened by the vehicle control unit;
when the electric quantity state is smaller than the second-level electric quantity value, judging whether the electric quantity state is larger than a third-level electric quantity value;
when the electric quantity state is greater than the third-level electric quantity value, the third indicator lamp is lightened through the vehicle control unit, and when the electric quantity state is less than the third-level electric quantity value, the action is executed: and judging whether the electric quantity state of the vehicle-mounted battery is greater than a preset value.
9. The battery over-discharge prevention method according to claim 7, wherein when the state of charge of the vehicle-mounted battery is less than a preset value, the method further comprises:
and judging whether the vehicle is in a starting state, and if not, controlling the wireless communication module to send preset prompt information to a pre-stored target terminal.
10. An automobile, comprising: a plurality of vehicle electrical appliances and a vehicle-mounted battery, wherein the vehicle-mounted battery is at least used for providing working power supply for the plurality of vehicle electrical appliances, and is characterized in that the battery over-discharge prevention device of any one of claims 1 to 6 is also applied;
the vehicle controller is also used for controlling the working states of a plurality of electric appliances of the vehicle;
at least one vehicle electrical appliance in the vehicle electrical appliances uses the main contact of the second relay as a turn-off switch.
CN202210493303.6A 2022-05-07 2022-05-07 Battery over-discharge prevention device and vehicle Pending CN114670645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210493303.6A CN114670645A (en) 2022-05-07 2022-05-07 Battery over-discharge prevention device and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210493303.6A CN114670645A (en) 2022-05-07 2022-05-07 Battery over-discharge prevention device and vehicle

Publications (1)

Publication Number Publication Date
CN114670645A true CN114670645A (en) 2022-06-28

Family

ID=82079346

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210493303.6A Pending CN114670645A (en) 2022-05-07 2022-05-07 Battery over-discharge prevention device and vehicle

Country Status (1)

Country Link
CN (1) CN114670645A (en)

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