CN114079313A - Remote power-off protection device and method for automobile battery - Google Patents
Remote power-off protection device and method for automobile battery Download PDFInfo
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- CN114079313A CN114079313A CN202111359077.4A CN202111359077A CN114079313A CN 114079313 A CN114079313 A CN 114079313A CN 202111359077 A CN202111359077 A CN 202111359077A CN 114079313 A CN114079313 A CN 114079313A
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- 238000000034 method Methods 0.000 title claims description 22
- 238000004891 communication Methods 0.000 claims abstract description 70
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 23
- 238000010295 mobile communication Methods 0.000 claims description 21
- 230000002159 abnormal effect Effects 0.000 claims description 19
- 238000004364 calculation method Methods 0.000 claims description 15
- 238000004378 air conditioning Methods 0.000 claims description 13
- 230000003068 static effect Effects 0.000 claims description 10
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- 239000011159 matrix material Substances 0.000 claims description 3
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- 230000032683 aging Effects 0.000 abstract description 4
- 230000036541 health Effects 0.000 description 5
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
-
- 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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a remote power-off protection device for an automobile battery, which comprises: the system comprises a storage battery, a storage battery sensor, a battery distribution module, a battery control module, a communication module and a lithium battery module; the storage battery sensor is arranged at the negative pole of the storage battery; the positive pole of the battery distribution module is connected with the positive pole of the storage battery, and the negative pole of the battery distribution module is connected with the positive pole of the load; the negative pole of the load is connected with the negative pole of the storage battery after passing through the storage battery sensor; the control end of the battery distribution module is connected with the battery control module; the storage battery sensor is also connected with the battery control module, and the communication module is connected with the battery control module; the lithium battery module is connected with the battery control module and is also connected with a load; the device can detect the storage battery of the automobile, and controls the electric control system in the automobile to disconnect the circuit through the battery distribution module so as to protect the storage battery of the automobile and avoid the storage battery aging caused by the power shortage of the storage battery.
Description
Technical Field
The invention relates to the technical field of automobile power supply battery control, in particular to an automobile battery remote power-off protection device and method.
Background
Modern automobiles become an indispensable important part in human life, and a lead-acid battery plays a role in starting and assisting power supply on the automobiles in the traditional fuel oil automobile type; the electric system of the electric automobile is composed of two types of batteries, one type is a power battery for providing energy for driving the automobile; another type is a battery that provides a low voltage source of energy for the electrical components. During the storage period of the vehicle, the electric control system can still work intermittently, and the static current exists, so that the electric quantity of the storage battery can be continuously consumed; the charging strategies of the storage battery (i.e. the strategy of charging the storage battery by the power battery) are divided into two types: one is a continuous battery charging strategy and the other is a short term battery charging strategy. The first strategy can maintain the electric quantity of the storage battery for a long time without generating power shortage, but can cause the capacity of the power battery to be reduced, and the storage time is too long, so that the power battery can be caused to be power shortage. The second strategy protects the storage capacity of the power cell, but long storage causes a battery starvation, and the capacity of the battery is significantly lower than the power cell, so the vehicle can be stored for a shorter time than the first strategy. No matter the power battery is in short circuit or the storage battery is in short circuit, the chemical environment in the battery can generate certain irreversible reaction, and the cycle life of the battery is further reduced.
In view of the problems caused by aging of the battery, it is important to establish a detection of the state of the battery. The vehicle owner can not visually find out the current health condition and electricity utilization condition of the storage battery from the storage battery indicator lamp on the instrument panel in the daily process, the storage battery indicator lamp on the instrument panel of the general vehicle only prompts the occurrence of the fault or abnormal condition of the battery control unit or the rechargeable battery unit, and the fault or abnormal condition of the battery control unit or the rechargeable battery unit can not be directly identified. Also, when an abnormality related to electric power occurs in the vehicle, it is difficult for a user or a maintenance person operating the vehicle to directly determine whether a problem is originated from the electric control system or the battery module of the vehicle. The existing automobile battery monitoring scheme mostly adopts a mode of directly measuring the output end voltage or the output current of the storage battery to measure the residual electric quantity of the storage battery, and the detection mode has a single acquisition source, so that misjudgment is easily caused by measurement errors when the electric quantity of the storage battery is judged to be early-warned and the health condition of the storage battery is detected.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a remote power-off protection device and method for an automobile battery, so as to solve the problems that the existing automobile storage battery has a single data acquisition source and is difficult to judge.
The technical purpose of the invention is realized by the following technical scheme: an automotive battery remote power-off protection device, comprising: the system comprises a storage battery, a storage battery sensor for detecting the state of the storage battery, a battery distribution module for controlling the connection or disconnection of the storage battery and a load, a battery control module for judging the state of the storage battery and controlling the battery distribution module, a communication module for communicating with an external controller, and a lithium battery module for supplying power to the battery control module;
the storage battery sensor is arranged at the negative electrode of the storage battery;
the positive electrode of the battery distribution module is connected with the positive electrode of the storage battery, and the negative electrode of the battery distribution module is connected with the positive electrode of the load; the negative electrode of the load is connected with the negative electrode of the storage battery after passing through the storage battery sensor;
the control end of the battery distribution module is connected with the battery control module; the storage battery sensor is also connected with the battery control module, and the communication module is connected with the battery control module;
the lithium battery module is connected with the battery control module and is also connected with a load.
Optionally, the communication module includes: a communication control chip and a communication antenna; the communication control chip specifically comprises: one or more of a Bluetooth (Bluetooth) chip, a Zigbee chip, a global system for mobile communication (GSM) chip, a fourth generation (4G) mobile communication chip or a 5 generation (5G) mobile communication chip.
Optionally, the battery distribution module includes: the control end of the relay is connected with the battery control unit, the input end of the relay is connected with the anode of the storage battery, and the output end of the relay is connected with a load.
Optionally, the load includes: one or more of a vehicle audio and video system, a vehicle safety protection system, and a vehicle air conditioning system; the positive electrode of the vehicle audio-video system, the positive electrode of the vehicle safety protection system and the positive electrode of the vehicle air conditioning system are respectively connected with the output ends of the relays in a one-to-one correspondence manner; and the negative electrode of the vehicle audio-video system, the negative electrode of the vehicle safety protection system and the negative electrode of the vehicle air conditioning system are connected with the negative electrode of the storage battery through a vehicle body grounding piece and a storage battery sensor.
Optionally, the vehicle audio-video system further comprises a plurality of fusing wire boxes, one ends of the fusing wire boxes are in one-to-one correspondence with the output ends of the relays, and the other ends of the fusing wire boxes are in one-to-one correspondence with the anode of the vehicle audio-video system, the anode of the vehicle safety protection system and the anode of the vehicle air conditioning system.
Optionally, the output end of the relay is further connected with the anode of the automobile ignition device, and the cathode of the automobile ignition device is connected with the cathode of the storage battery after passing through the automobile body ground and the storage battery sensor in sequence.
Optionally, the apparatus further comprises: and the output end of the solar charging module is connected with the lithium battery device.
The invention also provides a remote power-off protection method for the automobile battery, which specifically comprises the following steps:
s1, the battery control module respectively acquires state information of the electric control system and the storage battery from the storage battery sensor and the battery distribution module;
s2, the battery control module judges and analyzes the vehicle information, and if the parameters of the battery control module or the storage battery are abnormal, the battery control module sends an abnormal state signal to external communication equipment or an information server through the communication module;
s3, sending out warning prompt to the user when the external device or the signal server receives the abnormal state signal;
s4, the user sends a control instruction to the battery control module through the communication module by external communication equipment or an information server;
and S5, the battery control module controls the battery distribution module to disconnect part or all of the load circuits under the condition that the battery control module receives the control instruction.
Optionally, the receiving, by the external device or the signal server, the abnormal signal includes: the battery control module sends an abnormal state signal to external communication equipment through the Bluetooth (Bluetooth) chip or the Zigbee chip, the global system for mobile communication (GSM) chip or the fourth generation (4G) mobile communication chip or the 5 generation (5G) mobile communication chip; and the external communication equipment estimates whether the current state of the storage battery is abnormal or not according to the acquired electric quantity, time and electric quantity consumption speed of the battery control module.
Optionally, the present invention further provides an electric quantity detection method, where the battery control module obtains state information of the electric control system and the storage battery from the storage battery sensing and distributing module, respectively, and the method includes:
s11, initializing information parameters of the battery control module;
s12, the battery sensor judges the automobile state according to the working state of the battery, and executes the steps S131 to S133 under the condition that the automobile is static for a long time; when the automobile is in the process of running, executing steps S141-S144;
s131, under the condition that the automobile is static for a long time, the storage battery sensor measures the open-circuit voltage of the storage battery after the storage battery is in the static dormancy state, and transmits the open-circuit voltage to the battery control module;
s132, the battery control module calculates the residual capacity of the storage battery according to a calculation formula y of the open-circuit voltage and the SOC (state of charge), wherein bx + k is the value of the residual capacity of the storage battery;
s133, the battery control module sends the residual capacity information of the storage battery to external communication equipment or an information server through the communication module;
s141, under the condition that the automobile is in the driving process, the storage battery sensor collects a current value i of the storage battery, a timer in the storage battery sensor is used for recording a time interval delta t corresponding to the collected current value, and the current value and the time interval are transmitted to the battery control module;
s142, the battery control module calculates a formula according to ampere-hour integral of current
Calculating the residual capacity of the storage battery;
s143, correcting the SOC value obtained by the ampere-hour integral calculation according to the SOC value obtained by the calculation of the open-circuit voltage of the storage battery before the automobile is started and a correction matrix;
and S144, the battery control module sends the residual electric quantity information of the storage battery to external communication equipment or an information server through the communication module.
In conclusion, the invention has the following beneficial effects: the application provides a long-range power-off protection device of car battery includes: the system comprises a storage battery, a storage battery sensor for detecting the state of the storage battery, a battery distribution module for controlling the connection or disconnection of the storage battery and a load, a battery control module for judging the state of the storage battery and controlling the battery distribution module, a communication module for communicating with an external controller, and a lithium battery module for supplying power to the battery control module; the storage battery sensor is arranged at the negative electrode of the storage battery; the positive electrode of the battery distribution module is connected with the positive electrode of the storage battery, and the negative electrode of the battery distribution module is connected with the positive electrode of the load; the negative electrode of the load is connected with the negative electrode of the storage battery after passing through the storage battery sensor; the control end of the battery distribution module is connected with the battery control module; the storage battery sensor is also connected with the battery control module, and the communication module is connected with the battery control module; the lithium battery module is connected with the battery control module and is also connected with a load; the device can detect the storage battery of the automobile, and controls the electric control system in the automobile to disconnect the circuit through the battery distribution module so as to protect the storage battery of the automobile and avoid the storage battery aging caused by the power shortage of the storage battery.
Drawings
FIG. 1 is a schematic view of the protective device of the present invention;
FIG. 2 is a schematic diagram of a battery distribution module according to the present invention;
FIG. 3 is a flow chart of the protection method of the present invention;
FIG. 4 is a flow chart of a battery state information determination method of the present invention;
in the figure: 1. a storage battery; 2. a battery sensor; 3. a battery distribution module; 31. a relay; 4. a battery control module; 5. a communication module; 51. a communication control chip; 52. a communication antenna; 6. a lithium battery module; 7. a solar charging module; 8. fusing the wire box; 9. an ignition device; 10. bonding the vehicle body; 11. and (4) loading.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for descriptive purposes only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, configuration, and operation, and therefore should not be construed as limiting the present invention.
The invention is described in detail below with reference to the figures and examples.
Referring to fig. 1 to 4 together, the present invention provides a remote power-off protection device for a vehicle battery, including: the system comprises a storage battery 1, a storage battery sensor 2 for detecting the state of the storage battery 1, a battery distribution module 3 for controlling the connection or disconnection of the battery and a load, a battery control module 4 for controlling the charging or discharging of the battery of the automobile storage battery 1, a communication module 5 for communicating with an external controller, and a lithium battery module 6 for supplying power to the battery control module 4; the battery sensor 2 is arranged at the negative electrode of the battery 1; the positive electrode of the battery distribution module 3 is connected with the positive electrode of the storage battery 1, and the negative electrode of the battery distribution module 3 is connected with the positive electrode of the load; the negative pole of the load is connected with the negative pole of the storage battery 1 after passing through the storage battery sensor 2; the control end of the battery distribution module 3 is connected with the battery control module 4; the storage battery sensor 2 is also connected with the battery control module 4, and the communication module 5 is connected with the battery control module 4; the lithium battery module 6 is connected with the battery control module 4, and the lithium battery module 6 is also connected with a load.
Specifically, a conventional power supply device for an automobile, whether an oil-burning automobile or an electric automobile, uses a single storage battery 1 as a power supply device for an electronic control system of the automobile, but when the automobile is not running, the storage battery 1 is not in a complete dormant state, but continues to output a weak current for the electronic control system of the automobile to continue to operate, wherein the electronic control system of the automobile mainly comprises: a safety anti-theft device, an ignition device 9, a remote control device and the like of the vehicle; therefore, in the case where the vehicle is left standing for a long period of time, the amount of electricity in the battery 1 gradually loses until it is completely discharged. When the vehicle is completely without the battery 1, the remote control, the anti-theft alarm device, the door lock device and other parts of the vehicle which need to be controlled by electric power will be completely disabled, so that people can not start the vehicle. Therefore, in order to avoid the situation that the automobile is in a state of short power of the storage battery 1 for a long time, the invention provides a device for remotely controlling and detecting the residual electric quantity of the storage battery 1 of the automobile, and when the storage battery 1 is in a state of short power, people are reminded in time so that people can take necessary measures in time; the battery control module 4 uses a programmable MCU module, and is used for calculating the electric quantity of the storage battery 1 and executing a preset program; the battery distribution module 3 mainly comprises a plurality of sets of relays 31, the control pins of the battery control module 4 are connected with the control ends of the relays 31 in a one-to-one correspondence manner, the power supply switch end of the relay 31 is used for connecting the storage battery 1 with a load, and in this embodiment, the load includes: vehicle audio-visual system, vehicle safety protection system, vehicle air conditioning system etc. all need carry out the on-vehicle device of electric control: when the battery control module 4 detects that the remaining capacity of the storage battery 1 is lower than a set threshold, the relay 31 is controlled to open one or more specific sets of relays 31 through a predetermined program, so as to achieve the purpose of reducing the output of the storage battery 1. Further, in order to avoid when battery 1 completely cuts off the power supply, battery control module 4 can't normally work and monitor battery 1's state, still included one be used for battery control device carries out the lithium battery module 6 of supplying power, lithium battery module 6 on the one hand with battery control device links to each other, and on the other hand is in order to realize charging of lithium cell, and the lithium cell still links to each other with the load, works as when battery 1 is the load power supply, the lithium cell also can charge simultaneously, so that after battery 1 completely cuts off the power supply, for battery control device supplies power.
Further, the communication module 5 includes: a communication control chip 51 and a communication antenna 52; the communication control chip 51 specifically includes: a Bluetooth (Bluetooth) chip, a Zigbee chip, a global system for mobile communications (GSM) chip, a fourth generation (4G) mobile communication chip, or a 5 generation (5G) mobile communication chip;
specifically, the communication antenna 52 is mainly installed on the surface of the vehicle roof or the vehicle, so that the metal hood cover is prevented from being arranged on the communication antenna 52, and the signal transmission and reception are difficult.
Further, the battery distribution module 3 includes: the control end of the relay 31 is connected with the battery control unit, the input end of the relay 31 is connected with the anode of the storage battery 1, and the output end of the relay 31 is connected with a load. The relay 31 is provided between the battery 1 and the load, and is used for disconnecting the battery 1 from the load, thereby avoiding the occurrence of power shortage due to the excessive use of the battery 1.
Further, the load includes: one or more of a vehicle audio and video system, a vehicle safety protection system, and a vehicle air conditioning system; the anode of the vehicle audio-video system, the anode of the vehicle safety protection system and the anode of the vehicle air conditioning system are respectively connected with the output ends of the relays 31 in a one-to-one correspondence manner; and the cathode of the vehicle audio-video system, the cathode of the vehicle safety protection system and the cathode of the vehicle air conditioning system are connected with the cathode of the storage battery 1 through the vehicle body earth and the storage battery sensor 2.
Furthermore, in order to avoid the safety problem caused by excessive current, the protection device further comprises a plurality of fusing wire boxes 8, wherein one ends of the fusing wire boxes 8 are in one-to-one correspondence with the output ends of the relays 31, and the other ends of the fusing wire boxes 8 are in one-to-one correspondence with the anode of the vehicle audio-video system, the anode of the vehicle safety protection system and the anode of the vehicle air conditioning system.
Further, the output end of the relay 31 is also connected with the anode of the automobile ignition device 9, and the cathode of the automobile ignition device 9 is connected with the cathode of the storage battery 1 after passing through the automobile body bonding and the storage battery sensor 2 in sequence. The connection mode of the vehicle body bonding can reduce the number of wires inside the vehicle, and meanwhile, the oxidation resistance of the vehicle frame can be improved by connecting the negative electrode with the vehicle frame.
In order to avoid the situation that the lithium battery is not electrified under the condition of long-time stationary vehicle, the protection device is also provided with: the solar energy charging module 7 is characterized in that the output end of the solar energy charging module 7 is connected with the lithium battery device, and the solar energy charging module 7 can charge the lithium battery through sunlight or an artificial light source so as to be prepared for the need from time to time.
Further, the application also provides a remote power-off protection method for protecting the automobile battery by using the remote power-off protection device for the green and sparse automobile battery, which specifically comprises the following steps:
s1, the battery control module 4 respectively acquires the state information of the electric control system and the storage battery 1 from the storage battery sensor 2 and the battery distribution module 3;
s2, the battery control module 4 performs a judgment and analysis on the vehicle information, and if the parameters of the battery control module 4 or the storage battery 1 are abnormal, the battery control module 4 sends an abnormal state signal to an external communication device or an information server through the communication module 5;
s3, sending out warning prompt to the user when the external device or the signal server receives the abnormal state signal;
s4, the user sends a control instruction to the battery control module 4 through the communication module 5 by external communication equipment or an information server;
s5, when receiving the control command, the battery control module 4 controls the battery distribution module 3 to disconnect part or all of the load circuits.
Specifically, in step S1, the battery sensor 2 is disposed on the negative electrode of the battery 1, and can be used to detect the current value of the battery 1 on the one hand, and the static open-circuit voltage of the battery 1 on the other hand, so that the battery control module 4 can perform calculation and determination.
Specifically, in the step S2, the external communication device may be a mobile phone, an industrial personal computer, a remote data center, etc., and the information interaction process may be performed by the communication module 5, the communication module 5 selects different information interaction means according to the difference between the interaction object and the information interaction distance, and the communication module 5 may be specifically divided into a Bluetooth (Bluetooth) module, a Zigbee module, a global system for mobile communications (GSM) module, a fourth generation (4G) mobile communication module, or a 5 generation (5G) mobile communication module.
Specifically, in the step S5, the relay 31 is turned off to reduce the power consumption of the battery 1, and the normal operation of the battery control module 4 is maintained by the power supply of the lithium battery, so as to ensure that the vehicle cannot be started because the battery 1 is dead when people need to start the vehicle.
Further, the external device or the signal server receiving the abnormal signal includes: the battery control module 4 sends an abnormal state signal to external communication equipment through the Bluetooth (Bluetooth) chip or the Zigbee chip, the global system for mobile communications (GSM) chip or the fourth generation (4G) mobile communication chip or the 5 generation (5G) mobile communication chip; when the vehicle is in the underground garage, inconvenient through the remote communication means to the external world under the condition of sending the signal, external communication equipment such as cell-phone can't pass through remote communication with battery control module 4 communicates, therefore external communication equipment can be according to the information that last communication obtained to and the equipment that battery 1 communicates external communication equipment is through the electric quantity, time, and the electric quantity consumption speed of battery control module 4 that have obtained, whether the electric quantity of current battery 1 of estimation exists the insufficient voltage risk.
Further, the battery control module 4 obtains the state information of the electric control system and the storage battery 1 from the storage battery 1 sensing and battery distributing module 3, that is, the judgment of the remaining capacity of the storage battery 1 specifically includes the following steps:
s11, initializing information parameters of the battery control module 4;
s12, the battery sensor 2 determines the state of the vehicle based on the operating state of the battery 1, and if the vehicle is stationary for a long time, steps S131 to S133 are executed; when the automobile is in the process of running, executing steps S141-S144;
s131, under the condition that the automobile is static for a long time, the storage battery sensor 2 measures the open-circuit voltage of the storage battery 1 after the storage battery 1 is static and dormant, and transmits the open-circuit voltage to the battery control module 4;
s132, calculating the remaining capacity of the storage battery 1 by the battery control module 4 according to the open-circuit voltage and SOC calculation formula y ═ bx + k;
s133, the battery control module 4 transmits the remaining capacity information of the storage battery 1 to an external communication device or an information server through the communication module 5;
s141, under the condition that the automobile is in the running process, the storage battery sensor 2 collects a current value i of the storage battery 1, a timer in the storage battery sensor 2 is used for recording a time interval t corresponding to the collected current value, and the current value and the time interval are transmitted to the battery control module 4;
s142, ampere-hour integrating meter of battery control module 4 according to currentFormula of calculation
Calculating the residual capacity of the storage battery 1;
s143, correcting the SOC value obtained by the ampere-hour integral calculation according to the SOC value obtained by the open-circuit voltage calculation of the storage battery 1 before the automobile is started and a correction matrix;
s144, the battery control module 4 transmits the remaining capacity information of the storage battery 1 to an external communication device or an information server through the communication module 5.
Specifically, in order to describe the state of the battery 1, three states of soc (state of charge), sof (state of function), and soh (state of health) are used herein to represent the state of the battery 1.
1) Where the state of charge, SOC, of a battery refers to a measure of the available battery capacity (percentage) described as the actual deliverable power divided by the nominal capacity multiplied by 100%, typically ampere-hours is used as the unit of capacity. There are two main algorithms for calculating SOC: one is OCV Open Circuit Voltage (Open Circuit Voltage) calculation after the battery 1 has completed the standing sleep, and the other is real-time calculation based on current ampere-hour integration. The calculation of OCV of the 1 st kind mainly refers to the battery 1 supplier test table. The test table of the secondary battery 1 describes the relationship between the open circuit voltage and the SOC of a battery at a specific temperature, and the relationship between the voltage and the SOC varies linearly. Using the linear equation y-bx + k, with the percentage of SOC as x and the voltage value as y, the 2 nd current-based ampere-hour integrated SOC calculation is:
in the formula: SOC0Represents the initial SOC; i represents the total current passed over the statistical time; t represents the length of time of the statistic; cNThe rated capacity of the storage battery.
2) The state of function sof of the battery is an estimate that takes into account aging effects, battery temperature, voltage drop during start-up, and internal resistance and current requirements specified by the manufacturer of the battery 1. The SOF will be the estimated minimum voltage value during the next start-up. The method is commonly used for calibrating input conditions of the starting and stopping functions of the whole vehicle. The calculation algorithm for SOF can be briefly summarized as SOF ═ Ubat-U0-IRi. If the battery 1 is aged, the value of Ri will be increased, and the value of SOF will be decreased. The degree of aging of the battery 1 can be fed back to some extent by the magnitude of the SOF value.
3) The state of health of the battery, soh, (state of health), which represents the actual maximum capacity of a fully charged battery, as compared to the initial/nominal battery capacity. The rated capacity refers to the capacity of a new battery that is fully charged and discharged at a particular rate and temperature. The meaning of SOH can be known as the ratio of the actual maximum charge capacity to the rated capacity of the battery. When a battery is in an aged state, the SOC of the battery cannot reach the factory 100% state.
In summary, the device can accurately calculate the residual electric quantity of the vehicle-mounted storage battery through various detection modes, and then prompt people through a remote communication means; furthermore, specific loads can be disconnected through control, the storage time of the storage battery is prolonged, and the problem that the vehicle cannot be started due to insufficient power of the storage battery after long-time discharging is avoided.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A remote power-off protection device for an automobile battery is characterized by comprising: the system comprises a storage battery, a storage battery sensor for detecting the state of the storage battery, a battery distribution module for controlling the connection or disconnection of the storage battery and a load, a battery control module for judging the state of the storage battery and controlling the battery distribution module, a communication module for communicating with an external controller, and a lithium battery module for supplying power to the battery control module;
the storage battery sensor is arranged at the negative electrode of the storage battery;
the positive electrode of the battery distribution module is connected with the positive electrode of the storage battery, and the negative electrode of the battery distribution module is connected with the positive electrode of the load; the negative electrode of the load is connected with the negative electrode of the storage battery after passing through the storage battery sensor;
the control end of the battery distribution module is connected with the battery control module; the storage battery sensor is also connected with the battery control module, and the communication module is connected with the battery control module;
the lithium battery module is connected with the battery control module and is also connected with a load.
2. The remote power-off protection device for the automobile battery according to claim 1, wherein the communication module comprises: a communication control chip and a communication antenna; the communication control chip is connected with the battery control module, and the communication antenna is connected with the communication control chip; the communication control chip specifically comprises: one or more of a Bluetooth (Bluetooth) chip, a Zigbee chip, a global system for mobile communication (GSM) chip, a fourth generation (4G) mobile communication chip or a 5 generation (5G) mobile communication chip.
3. The remote power-off protection device for the automobile battery according to claim 1, wherein the battery distribution module comprises: the control end of the relay is connected with the battery control unit, the input end of the relay is connected with the anode of the storage battery, and the output end of the relay is connected with a load.
4. The remote power-off protection device for the automobile battery according to claim 3, wherein the load comprises: one or more of a vehicle audio and video system, a vehicle safety protection system, and a vehicle air conditioning system; the positive electrode of the vehicle audio-video system, the positive electrode of the vehicle safety protection system and the positive electrode of the vehicle air conditioning system are respectively connected with the output ends of the relays in a one-to-one correspondence manner; and the negative electrode of the vehicle audio-video system, the negative electrode of the vehicle safety protection system and the negative electrode of the vehicle air conditioning system are connected with the negative electrode of the storage battery through a vehicle body grounding piece and a storage battery sensor.
5. The automobile battery remote power-off protection device according to claim 4, further comprising a plurality of fuse boxes, wherein one ends of the plurality of fuse boxes are connected with the output ends of the plurality of relays in a one-to-one correspondence manner, and the other ends of the plurality of fuse boxes are connected with the anode of the vehicle audio-video system, the anode of the vehicle safety protection system and the anode of the vehicle air conditioning system in a one-to-one correspondence manner.
6. The remote power-off protection device for the automobile battery as claimed in claim 5, wherein the output end of the relay is further connected with the positive electrode of an automobile ignition device, and the negative electrode of the automobile ignition device is connected with the negative electrode of the storage battery after passing through the automobile body grounding and the storage battery sensor in sequence.
7. The remote power-off protection device for the automobile battery according to claim 1, further comprising: and the output end of the solar charging module is connected with the lithium battery device.
8. A vehicle battery remote power-off protection method using the vehicle battery remote power-off protection device according to any one of claims 1 to 7, comprising:
s1, the battery control module respectively acquires state information of the electric control system and the storage battery from the storage battery sensor and the battery distribution module;
s2, the battery control module judges and analyzes the vehicle information, and if the parameters of the battery control module or the storage battery are abnormal, the battery control module sends an abnormal state signal to external communication equipment or an information server through the communication module;
s3, sending out warning prompt to the user when the external device or the signal server receives the abnormal state signal;
s4, the user sends a control instruction to the battery control module through the communication module by external communication equipment or an information server;
and S5, the battery control module controls the battery distribution module to disconnect part or all of the load circuits under the condition that the battery control module receives the control instruction.
9. The method for remote power-off protection of automobile battery according to claim 8, wherein the external device or the signal server receives an abnormal signal, comprising:
the battery control module sends an abnormal state signal to external communication equipment through the Bluetooth (Bluetooth) chip or the Zigbee chip, the global system for mobile communication (GSM) chip or the fourth generation (4G) mobile communication chip or the 5 generation (5G) mobile communication chip;
and the external communication equipment estimates whether the current state of the storage battery is abnormal or not according to the acquired electric quantity, time and electric quantity consumption speed of the battery control module.
10. The method according to claim 8, wherein the battery control module obtains status information of the electronic control system and the battery from the battery sensing and distributing module respectively, and the method comprises:
s11, initializing information parameters of the battery control module;
s12, the battery sensor judges the automobile state according to the working state of the battery, and executes the steps S131 to S133 under the condition that the automobile is static for a long time; when the automobile is in the process of running, executing steps S141-S144;
s131, under the condition that the automobile is static for a long time, the storage battery sensor measures the open-circuit voltage of the storage battery after the storage battery is in the static dormancy state, and transmits the open-circuit voltage to the battery control module;
s132, calculating, by the battery control module, a remaining capacity of the battery according to a calculation formula Y ═ bx + k (where X represents a percentage of the SOC, Y represents a voltage value, and B is a linear relationship coefficient) of the open-circuit voltage and the SOC;
s133, the battery control module sends the residual capacity information of the storage battery to external communication equipment or an information server through the communication module;
s141, under the condition that the automobile is in the driving process, the storage battery sensor collects a current value i of the storage battery, a timer in the storage battery sensor is used for recording a time interval t corresponding to the collected current value, and the current value and the time interval are transmitted to the battery control module;
s142, the battery control module calculates a formula according to ampere-hour integral of current
(in the formula: SOC)0Represents the initial SOC; cNRepresenting a rated capacity of a storage battery) to calculate a remaining capacity of the storage battery;
s143, correcting the SOC value obtained by the ampere-hour integral calculation according to the SOC value obtained by the calculation of the open-circuit voltage of the storage battery before the automobile is started and a correction matrix;
and S144, the battery control module sends the residual electric quantity information of the storage battery to external communication equipment or an information server through the communication module.
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