CN116766931A - Vehicle battery management system, data acquisition method and device and vehicle - Google Patents
Vehicle battery management system, data acquisition method and device and vehicle Download PDFInfo
- Publication number
- CN116766931A CN116766931A CN202310675013.8A CN202310675013A CN116766931A CN 116766931 A CN116766931 A CN 116766931A CN 202310675013 A CN202310675013 A CN 202310675013A CN 116766931 A CN116766931 A CN 116766931A
- Authority
- CN
- China
- Prior art keywords
- power supply
- voltage
- battery
- low
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 44
- 230000002159 abnormal effect Effects 0.000 claims description 40
- 238000004891 communication Methods 0.000 claims description 17
- 238000013480 data collection Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 14
- 238000004590 computer program Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 6
- 230000006378 damage Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a vehicle battery management system, a data acquisition method, equipment and a vehicle, wherein the system comprises the following components: the power supply module comprises a low-voltage power supply unit and a high-voltage power supply unit and is used for supplying power to the battery management system; the power supply management circuit is used for monitoring the power failure condition of the low-voltage storage battery in the low-voltage power supply unit and determining whether to switch the power supply of the battery management system; the data processing module is used for detecting the power battery pack of the high-voltage power supply unit, obtaining and storing first battery data, if the low-voltage storage battery is not powered down, keeping the low-voltage power supply unit as a power supply, obtaining the first battery data during low-voltage power supply, and if the low-voltage storage battery is powered down, switching the power supply into the high-voltage power supply unit, and obtaining the first battery data during high-voltage power supply. The invention realizes that the battery management system can still work normally after the low-voltage storage battery is powered down, and avoids the condition of losing battery data while improving the working reliability of the battery management system.
Description
Technical Field
The invention relates to the technical field of battery management, in particular to a vehicle battery management system, a data acquisition method, data acquisition equipment and a vehicle.
Background
With the development of new energy technology, electric vehicles are increasingly widely applied, such as passenger vehicles, logistics vehicles, communication vehicles, special vehicles and other vehicles, and power batteries are used as power sources, so that the power required by the running of the vehicles is met, and meanwhile, the pollution and damage to the environment are reduced. The power battery is one of important components of the electric vehicle, and the electric vehicle needs to detect and manage the power battery by using a BMS system (Batter ymanagementsystem ) in order to prevent the power battery from malfunctioning. In the related art, a low-voltage battery in an electric vehicle is generally used as a power supply to maintain normal operation. However, when the battery management system and the power battery are integrated together, the power battery will be separated from the power vehicle, or the low-voltage storage battery fails, the battery management system will be powered off, so that the data of the battery obtained by the power battery is detected to be lost before the power is cut off, and the battery management system has a vacuum state for managing the power battery before the low-voltage storage battery resumes power supply, so that the stability of the operation of the battery management system is low.
Chinese patent CN105958629a discloses a BMS power supply device and power supply method for an electric vehicle, in which an emergency power supply is added to the electric vehicle, and if the battery management system is powered off, the emergency power supply supplies power to the battery management system, so that the battery management system works normally. However, this solution is not suitable for the case where the power battery is directly detached from the vehicle body when the power conversion technique is used. Chinese patent CN108206550a discloses a high-voltage lithium battery BMS power supply circuit, which utilizes a high-voltage lithium battery to supply power to a battery management system, but the scheme can make the battery management system not cut off power, but uses a power battery as a power supply all the time, so that the loss of the power battery is increased, the service time of the power battery is affected, and the high-voltage battery and the low-voltage battery are not completely isolated, so that potential safety hazards exist.
Therefore, how to improve the working reliability of the battery management system, and make the battery management system still work normally after the low-voltage storage battery is powered down, so as to ensure that the obtained battery data is complete when the power battery is detected, which is a problem to be solved urgently.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a vehicle battery management system, a data collection method, a device and a vehicle, so as to solve at least one of the above-mentioned technical problems.
In a first aspect, the present invention provides a vehicle battery management system comprising: the device comprises a power supply module, a power management module and a data processing module; the power supply module comprises a low-voltage power supply unit and a high-voltage power supply unit which are respectively used for supplying power to the battery management system; the power supply management circuit is connected with the power supply module and is used for monitoring the power failure condition of the low-voltage storage battery in the low-voltage power supply unit and determining whether to switch the power supply of the battery management system or not based on a monitoring result; the data processing module is connected with the power management circuit and is used for detecting a power battery pack in the high-voltage power supply unit to obtain and store first battery data, wherein if the low-voltage storage battery is not powered down, the low-voltage power supply unit is kept to supply power to the battery management system, the first battery data during low-voltage power supply are obtained, and if the low-voltage storage battery is powered down, the power supply of the battery management system is switched to the high-voltage power supply unit, and the first battery data during high-voltage power supply are obtained.
In an embodiment of the present invention, the system further includes: the secondary power supply circuit is connected with the power supply module and used for converting the current output by the power supply module so as to supply power to the data processing module according to the converted current; if the secondary power supply module is powered by the low-voltage power supply unit, voltage stabilization, filtering and rectification are carried out on the first low-voltage power output by the low-voltage power supply unit to obtain a second low-voltage current; and if the secondary power supply module is powered by the high-voltage power supply unit, the first high-voltage power output by the high-voltage power supply unit is stabilized, filtered and rectified to obtain a second high-voltage current, and high-voltage and low-voltage isolation is arranged between the low-voltage power supply unit and the high-voltage power supply unit.
In an embodiment of the present invention, the high voltage power supply unit includes: the power battery pack, the transformer driving circuit, the transformer and the first switch; the first switch is used for connecting the power battery pack with the transformer driving circuit and the power management circuit respectively; the power battery pack is connected with the first switch and is used for supplying power to the transformer driving circuit; the transformer driving circuit is connected with the power battery pack and used for generating a driving signal so as to control the transformer to work; the transformer is used for reducing the current output by the power battery pack according to the driving signal to obtain a first high-voltage current, and supplying power to the power management circuit and the secondary power supply circuit through the first high-voltage current.
In an embodiment of the present invention, the low voltage power supply unit includes: the low-voltage storage battery, the primary power supply current and the second switch; the low-voltage storage battery is used for supplying power to the primary power supply circuit; the primary power supply circuit is connected with the low-voltage storage battery and used for reducing the voltage of the current output by the low-voltage storage battery to obtain a first low-voltage current, and the first low-voltage current is used for supplying power to the power supply management circuit; and one end of the second switch is connected with the low-voltage storage battery, and the other end of the second switch is connected with the current management circuit and is used for connecting the low-voltage storage battery with the power management circuit so that the power management circuit can obtain second battery data of the low-voltage storage battery and determine the power failure condition of the low-voltage storage battery based on the second battery data.
In an embodiment of the present invention, the data processing module includes: the battery detection circuit is connected with the power battery pack and is used for detecting physical parameters of each battery cell in the power battery pack, wherein the physical parameters comprise voltage, current and temperature of the battery cell, and the battery detection circuit is powered by the power battery pack; the control circuit is connected with the battery detection circuit and is used for detecting the power battery according to the physical parameters of all the battery monomers in the power battery, obtaining first battery data of the power battery pack and judging whether the first battery data are abnormal or not, wherein the detection of the power battery comprises insulation detection, balance detection and total voltage detection, and the control circuit is powered by the secondary power supply circuit; and the storage circuit is connected with the control circuit and used for storing the battery information of the power battery pack obtained by the detection unit, and the storage circuit is powered by the secondary power supply circuit.
In an embodiment of the present invention, the system further includes: and the collision detection circuit is connected with the control circuit and is used for detecting a collision signal of the vehicle, and the collision signal is sent to the power management circuit through the control circuit.
In an embodiment of the present invention, the power management circuit further includes: the first switching unit is used for switching the secondary power supply circuit from the first low-voltage power supply to the first high-voltage power supply if the second switch is in an off state; if the second switch is in an off state, generating the first switching instruction and sending the first switching instruction to the control circuit; if a first feedback signal which is fed back from the control circuit and carries the first battery data normally is received, switching the second-stage power supply circuit from the first low-voltage power supply to the first high-voltage power supply, and enabling the second-stage power supply circuit to output the second low-voltage current and convert the second low-voltage current into the second high-voltage current; and if a first feedback signal which is fed back from the control circuit and carries the first battery data abnormality is received, stopping supplying power to the battery management system.
In an embodiment of the present invention, the power management circuit further includes: the second switching unit is used for switching the secondary power supply circuit from the first low-voltage power supply to the first high-voltage power supply if the collision signal is abnormal or the low-voltage storage battery is abnormal; if the first battery data are normal, generating a second switching instruction, and sending the second switching instruction to the control circuit; if the second feedback information which is fed back from the control circuit and carries the collision signal or the second battery data is still abnormal is received within the preset time, the second-stage power supply circuit is switched from the first low-voltage current power supply to the first high-voltage current power supply, so that the second low-voltage current output by the second-stage power supply circuit is converted into the second high-voltage current; and if the second feedback information which is fed back from the control circuit and carries the collision signal or the second battery data is still abnormal is not received within the preset time, the second-stage power supply circuit is kept to be powered by the first low-voltage power supply.
In an embodiment of the present invention, the power management circuit further includes: a third switching unit for switching the secondary power supply circuit from the first high-voltage current power supply to the first low-voltage current power supply; generating a third switching instruction and sending the third instruction to the control circuit; if receiving third feedback information which is fed back from the control circuit and carries the low-voltage storage battery and does not lose power, the low-voltage storage battery is powered normally, the secondary power supply circuit is switched from the first high-voltage current power supply to the first low-voltage current power supply, and the secondary power supply circuit outputs the second high-voltage current and converts the second high-voltage current into the second low-voltage current; and if the third feedback information carrying the power failure of the low-voltage storage battery fed back by the control circuit is received, the power supply of the low-voltage storage battery is abnormal, and the second-level power supply circuit is kept to be powered by the first high-voltage circuit.
In an embodiment of the present invention, the system further includes: the clock circuit is connected with the control circuit and used for recording the switching time of power supply between the low-voltage power supply unit and the second power supply unit and storing the switching time in the storage circuit through the control circuit, and the clock circuit is powered by the secondary power supply circuit; the communication circuit is respectively connected with the primary power supply circuit and the control circuit and is used for sending the second battery information and the switching time stored in the storage circuit to a vehicle machine in the vehicle through the control circuit, and the communication circuit is powered by the primary power utilization circuit; the external control circuit is connected with the primary power supply circuit and used for controlling external equipment of the battery management system; the peripheral control circuit is powered by the primary power supply circuit.
In a second aspect, the present invention further provides a data acquisition method of a vehicle battery management system, including: detecting the power supply condition of a low-voltage storage battery in a vehicle, and determining whether the low-voltage storage battery is powered down, wherein the low-voltage storage battery is used for supplying power to a battery management system in the vehicle; if the low-voltage storage battery is not powered down, the low-voltage storage battery is kept to supply power for the battery management module so as to acquire data generated by the battery management system during low-voltage power supply; and if the low-voltage storage battery is powered down, switching a power battery in the vehicle to supply power for the battery management system so as to acquire data generated by the battery management system during high-voltage power supply.
In a third aspect, the present invention also provides a vehicle apparatus including the vehicle battery management system as described in the above embodiment, or a data collection method employing the vehicle battery management system as described in the above embodiment.
In a fourth aspect, the present invention also provides an electronic device, including: one or more processors; and a storage device for storing one or more programs, which when executed by the one or more processors, cause the one or more processors to implement the data collection method of the vehicle battery management system as described in the above embodiments.
The invention has the beneficial effects that: the invention provides a vehicle battery management system, a data acquisition method, data acquisition equipment and a vehicle. Firstly, when the low-voltage storage battery is powered down, the power supply of the battery management system is switched into the power battery pack, and on the premise of excessive power consumption of the power battery, the battery management system can still work normally after the low-voltage storage battery is powered down, the power battery pack is detected, and the working reliability of the battery management system is greatly improved. Second, the vehicle battery management system stores the first battery data when the low-voltage storage battery supplies low-voltage power, stores the first battery data when the power battery pack supplies high-voltage power, avoids battery data loss caused by power failure of the battery management system, and ensures the integrity of the battery data. Third, the vehicle battery management system divides a high-voltage power supply unit and a low-voltage power supply unit, separates high-voltage power supply from low-voltage power supply, avoids potential safety hazards caused by high-voltage and low-voltage mixing, and improves safety.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
FIG. 1 is a schematic illustration of an implementation environment of a vehicle battery management system according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic diagram of a vehicle battery management system according to an exemplary embodiment of the present invention;
FIG. 3 is a schematic diagram of a low voltage power supply shown in an exemplary embodiment of the present invention;
FIG. 4 is a schematic diagram of a high voltage power supply shown in an exemplary embodiment of the invention;
FIG. 5 is a flowchart illustrating a battery management system performing a first handoff according to an exemplary embodiment of the present invention;
fig. 6 is a flowchart illustrating a battery management system performing a second handoff according to an exemplary embodiment of the present invention;
fig. 7 is a flowchart illustrating a battery management system performing a third handover according to an exemplary embodiment of the present invention;
FIG. 8 is a flowchart illustrating a battery management system initial power up according to an exemplary embodiment of the present invention;
FIG. 9 is a flowchart illustrating a data collection method of a vehicle battery management system according to an exemplary embodiment of the present invention;
fig. 10 is a schematic diagram of a computer system suitable for use in implementing the electronic device of the present invention, as shown in an exemplary embodiment of the present invention.
Detailed Description
Further advantages and effects of the present invention will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In the following description, numerous details are set forth in order to provide a more thorough explanation of embodiments of the present invention, it will be apparent, however, to one skilled in the art that embodiments of the present invention may be practiced without these specific details, in other embodiments, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the embodiments of the present invention.
It should be understood that the battery management system is generally integrated with the power battery pack, and is used for detecting performances such as single body, insulation, total voltage and the like of the power battery pack, so as to obtain battery data, so as to know the battery state of the power battery, and to facilitate management of the power battery pack and prevent the power battery pack from malfunctioning, and therefore, the battery data of the power battery is very important. In the related art, the power supply of the battery management system is generally a low-voltage storage battery, after the low-voltage storage battery is powered down, or when the power battery pack is replaced, the battery management system can be powered down, so that battery data obtained by detection before power failure is lost, and before power supply is restored, the battery management system is in a vacuum state for managing the power battery, and the reliability of the operation of the battery management system is low.
Based on the above, the invention provides a technical scheme of a vehicle battery management system, which comprises a power supply module, a power supply module and a power supply module, wherein the power supply module comprises a low-voltage power supply unit and a high-voltage power supply unit which are respectively used for supplying power to the battery management system; the power supply management circuit is used for monitoring the power failure condition of the low-voltage storage battery in the low-voltage power supply unit and determining whether to switch the power supply of the power supply management system or not based on the monitoring result; the data processing module is used for detecting a power battery pack in the high-voltage power supply unit to obtain and store first battery data, wherein if the low-voltage storage battery is not powered down, the low-voltage power supply unit is kept to be a power supply source of the battery management system, the first battery data during low-voltage power supply is obtained, and if the low-voltage storage battery is powered down, the power supply source of the battery management system is switched to be a high-voltage power supply unit, and the first battery data during high-voltage power supply is obtained. The battery management system can still work independently after the low-voltage storage battery is powered down, so that the detection of the power battery pack is continued, the first battery data obtained through the detection are stored, and the first battery data are reported after the low-voltage storage battery is powered back.
Referring to fig. 1, a schematic diagram of an implementation environment of a vehicle battery management system according to an exemplary embodiment of the present invention is shown.
Referring to fig. 1, the implementation environment includes a vehicle 101 and a battery management system 102, wherein the battery management system 102 is embedded in the vehicle 101, the vehicle 101 is an electric vehicle that provides a power source through a power battery, the battery management system 101 generally uses a low-voltage storage battery in the vehicle 101 as a power supply source to complete battery management of the vehicle 101, that is, monitors a power battery pack in the vehicle 101, thereby obtaining battery data of the power battery pack, analyzing whether the battery data has abnormal data, storing and sending the abnormal data to a vehicle system in the vehicle 101, so that a user can intuitively know the battery state of the power battery pack through the vehicle system. Therefore, in order to ensure that the battery management system 102 can work normally after the low-voltage storage battery is powered down, the battery management system 102 is powered up by the power battery pack after the low-voltage storage battery is powered down, so that the battery management system can keep detecting the power battery pack, the battery data of the power battery pack is prevented from being lost due to the power failure of the battery management system, and the working stability of the battery management system is improved.
Referring to fig. 2, a schematic diagram of a vehicle battery management system according to an exemplary embodiment of the present invention is shown. The system may be applied to the implementation environment shown in fig. 1 and is specifically configured in a vehicle 101. The system may be adapted to other exemplary implementation environments and may be specifically configured in other devices, and the present embodiment is not limited to the implementation environments to which the system is adapted.
As shown in fig. 2, the exemplary vehicle battery management system includes: the power supply module, the power management circuit, and the data processing module, the secondary power supply circuit, the collision detection circuit, the RTC circuit (i.e., the clock circuit), the communication circuit, and the peripheral control circuit are described in detail below:
the power supply module is used for supplying power to the battery management system and comprises a low-voltage power supply unit and a high-voltage power supply unit, and high-voltage and low-voltage isolation is arranged between the low-voltage power supply unit and the high-voltage power supply unit;
specifically, as shown in fig. 2, the high-voltage power supply unit includes a power battery pack, a transformer driving circuit, a transformer, and a first switch, wherein:
and the first switch is used for connecting the power battery pack with the transformer driving circuit and the power management circuit respectively.
As shown in fig. 2, the first switch is K1 in fig. 2, and if the first switch K1 is in a closed state, it indicates that the current power supply of the battery management system is a power battery pack.
And the power battery pack is connected with the first switch and is used for supplying power to the transformer driving circuit.
Specifically, the power battery pack is a power battery in the vehicle and is used as a power source of the vehicle to meet the mileage requirement of the vehicle. The power supply voltage of the power battery pack is typically 47V to 800V, and the power battery pack is typically formed by arranging a plurality of battery cells, and may be a lead-acid battery, a lithium iron phosphate battery, a hydrogen fuel battery, a ternary lithium battery, or the like, which is not limited in this embodiment.
And one end of the transformer driving circuit is connected with the power battery pack, and the other end of the transformer driving circuit is connected with the transformer and is used for generating driving signals so as to control the transformer to work.
In detail, the variable voltage driving circuit generates a driving signal according to an output of the transformer to make the transformer stably operate and output a first high voltage current of a stable voltage when the high voltage and the low voltage are isolated.
And the transformer is used for reducing the current output by the power battery pack according to the driving signal to obtain a first high-voltage current, and supplying power to the power management circuit and the secondary power supply circuit through the first high-voltage current.
In detail, a transformer is an electrical device composed of two or more coils to transmit electric energy through a varying magnetic field, i.e., to be able to reduce or increase voltage and current. Therefore, the transformer can reduce the voltage of the output current of the power battery pack to obtain a first high-voltage current, and the voltage of the first high-voltage current is low.
In one embodiment of the invention, as shown in fig. 2, the transformer is L1, which is an isolation transformer. When the first switch K1 is in the closed state, the power battery pack wakes up the variable voltage driving circuit and the transformer L1 through the first switch K1 to convert the output voltage of the power battery pack into 5V, that is, the voltage of the first high-voltage current is 5V.
By the mode of stably converting high voltage into low voltage by using the transformer driving current and the transformer, high-low voltage isolation is realized, potential safety hazards caused by high-low voltage mixing are avoided, and electricity safety is improved.
As shown in fig. 2, the low voltage power supply unit includes a low voltage storage battery, a primary power supply circuit, and a second switch, wherein:
the low-voltage storage battery is used for supplying power to the primary power supply circuit.
Specifically, the low-voltage battery is a low-voltage battery in a vehicle, and its power supply voltage is typically in the range of 6V to 24V.
The primary power supply circuit is connected with the low-voltage storage battery and used for reducing the voltage of the current output by the low-voltage storage battery to obtain a first high-voltage current and supplying power to the power management circuit through the first high-voltage current.
As shown in fig. 2, the primary power supply current is directly supplied by the low-voltage storage battery, and the voltage of the output current of the low-voltage storage battery is converted into a first low-voltage current, so that the secondary power supply circuit, the peripheral control circuit, the communication circuit and the power management circuit are simultaneously supplied with power according to the first low-voltage current. The external control circuit is connected with the primary power supply circuit and used for driving external equipment which is required to be driven by the battery management system. The communication circuit is respectively connected with the primary power supply circuit and the control circuit (MCU circuit) and is used for transmitting the second battery information and the switching time stored in the storage circuit to a vehicle machine in the vehicle through the control circuit, and the communication circuit is powered by the primary power utilization circuit;
And one end of the second switch is connected with the low-voltage storage battery, and the other end of the second switch is connected with the current management circuit and is used for connecting the low-voltage storage battery with the power management circuit, so that the power management circuit obtains second battery data of the low-voltage storage battery and determines the power failure condition of the low-voltage storage battery based on the second battery data.
The second switch is used for controlling the low-voltage storage battery to supply power, when the second switch is changed from a closed state to an open state, the low-voltage storage battery stops supplying power to the battery management system at the moment, and the first switch needs to be closed immediately, so that the power battery pack timely supplies power to the battery management system, and the battery management system is prevented from being powered off, so that data of the first battery is lost.
In one embodiment of the present invention, the second switch is K1 shown in fig. 2, and if the second switch K2 is in a closed state, it indicates that the current power supply of the battery management system is a low-voltage storage battery. The second switch K2 is connected with the low-voltage storage battery and the power management circuit, so that the power management circuit can monitor the low-voltage storage battery.
Through the mode, the high-voltage power supply and the low-voltage power supply are isolated, the first high-voltage current is adopted to supply power for the secondary power supply current during high-voltage power supply, the first low-voltage current is adopted to supply power for the secondary power supply circuit during low-voltage power supply, and the safety of high-voltage power consumption is improved.
The secondary power supply circuit is connected with the power supply module and used for converting the current output by the power supply module so as to supply power for the data processing module according to the converted current; if the secondary power supply module is powered by the low-voltage power supply unit, voltage stabilization, filtering and rectification are carried out on the first low-voltage power output by the low-voltage power supply unit to obtain a second low-voltage current; and if the secondary power supply module is powered by the high-voltage power supply unit, stabilizing, filtering and rectifying the first high-voltage power output by the high-voltage power supply unit to obtain a second high-voltage current.
In one embodiment of the present invention, as shown in fig. 2, the secondary power supply circuit supplies power to the MCU circuit, the collision detection circuit, the storage circuit, and the RTC circuit, respectively, at the rear end thereof. If the low-voltage storage battery supplies power for the battery management system, the MCU circuit, the collision detection circuit, the storage circuit and the RTC circuit are powered by the second low-voltage power supply; if the power battery pack supplies power for the battery management system, the MCU circuit, the collision detection circuit, the storage circuit and the RTC circuit are powered by a second high-voltage power supply. The RTC circuit is connected with the MCU circuit and used for recording the switching time of power supply between the low-voltage power supply unit and the second power supply unit, storing the switching time in the storage circuit through the control circuit, and supplying power to the clock circuit by the secondary power supply circuit;
And the power management circuit is connected with the power supply module and is used for monitoring the power failure condition of the low-voltage storage battery in the low-voltage power supply unit and determining whether to switch the power supply of the power management system or not based on the monitoring result.
The power supply management circuit can monitor the power supply of the battery management system and complete the related switching between high-voltage power supply and low-voltage power supply so as to ensure that the battery management system always works normally. The power management system monitors the power supply state of the low-voltage storage battery in real time, if the low-voltage storage battery fails, the low-voltage storage battery is judged to be normally disconnected, namely, the second switch is disconnected due to replacement of the power battery pack, or the power is lost due to other abnormal conditions, namely, the overvoltage, undervoltage and collision signals of the low-voltage storage battery are abnormal.
And the collision detection circuit is connected with the control circuit and is used for detecting a collision signal of the vehicle, and the collision signal is sent to the power management circuit through the control circuit.
Specifically, in order to prevent the damage to a person caused by high-voltage leakage after the collision of the vehicle body, it is necessary to cut off the power supply of the power battery pack to the vehicle, and the battery management system and the power battery pack are generally integrated in a battery pack, at this time, no high-voltage electricity exists in the rest of the vehicle except the inside of the battery pack. Therefore, when the collision detection circuit detects an abnormal collision signal, the second switch needs to be turned off to stop the power supply to the low-voltage battery. Through collision detection's mode, when having avoided taking place the traffic accident, lead to high voltage electricity leakage because of the collision, damage other parts of vehicle, harm people's life has improved the security of high voltage electricity.
In one embodiment of the present invention, the collision detection circuit in fig. 2 informs the power management circuit through the MCU circuit after detecting the abnormal collision signal, so as to switch the second switch off through the power management circuit, and complete the switching from the low voltage power supply to the high voltage power supply.
The data processing module is connected with the power management circuit and used for detecting a power battery pack in the high-voltage power supply unit and obtaining and storing first battery data. If the low-voltage storage battery is not powered down, the low-voltage power supply unit is kept to be a power supply of the battery management system, and first battery data during low-voltage power supply are obtained; if the low-voltage storage battery is powered down, switching a power supply of the battery management system into a high-voltage power supply unit to acquire first battery data during high-voltage power supply; and if the battery management system is powered by the high-voltage power supply unit, the low-voltage storage battery resumes power supply, and the power supply of the battery management system is switched from the high-voltage power supply to the low-voltage power supply voltage.
Specifically, the data processing module includes: the battery detection circuit is connected with the power battery pack and is used for detecting physical parameters of each battery cell in the power battery pack, wherein the physical parameters comprise voltage, current and temperature of the battery cell, and the battery detection circuit is powered by the power battery pack; the control circuit is connected with the battery detection circuit and is used for detecting the power battery according to physical parameters of all battery monomers in the power battery to obtain first battery data of the power battery pack and judging whether the first battery data are abnormal or not, wherein the detection of the power battery comprises insulation detection, balance detection and total voltage detection, and the control circuit is powered by the secondary power supply circuit; and the storage circuit is connected with the control circuit and used for storing the battery information of the power battery pack obtained by the detection unit, and the storage circuit is powered by the secondary power supply circuit.
In one embodiment of the invention, the battery management system is capable of detecting the power battery pack through the battery detection circuit and the control circuit to obtain the first battery data. The battery detection circuit can periodically or real-timely reduce physical parameters such as voltage, input current, output current, temperature, electric quantity state and the like of each battery cell in the power battery pack, and send the physical parameters to the MCU circuit, the MCU circuit detects and calculates the parameters to obtain first battery data, and the first battery data at least comprises total voltage of the power battery pack, balanced state of the battery cells and insulation performance of the power battery, so that whether the first battery data is abnormal or not is judged, namely, the second battery data has abnormal data and is stored through the storage circuit. It should be understood that in actual operation, the second battery data may be screened according to actual requirements, and only screened data, for example, only abnormal data, may be stored. If the first battery data is abnormal, abnormal conditions of the power battery can be timely solved, normal operation of the power battery is guaranteed, and the reliability and safety of the power battery are improved.
In one embodiment of the invention, if the second battery data is abnormal, the functions of voltage protection, temperature protection, short circuit protection, overcurrent protection, insulation protection and the like of the power battery pack can be realized through the MCU circuit, and the voltage balance management among the single batteries can be realized.
Referring to fig. 3, a schematic diagram of low voltage power supply is shown according to an exemplary embodiment of the present invention. As shown in fig. 3, when the low-voltage storage battery is not powered down and low-voltage power supply is maintained, the second switch K2 is in a closed state, the primary power supply circuit is powered by the low-voltage storage battery, the secondary power supply circuit, the peripheral control circuit, the power management circuit and the communication circuit are powered by the primary power supply circuit, the MCU circuit, the storage circuit, the RTC circuit and the collision detection circuit are powered by the secondary power supply circuit, and at this time, the first battery data stored in the storage circuit is obtained when the low-voltage power supply is performed.
Referring to fig. 4, a schematic diagram of high voltage power supply is shown according to an exemplary embodiment of the present invention. As shown in fig. 4, when the low-voltage storage battery is powered down and is switched from low voltage to high voltage, the first switch K1 is in a closed state, the transformer driving circuit and the transformer form a high-voltage circuit, the power battery pack is used for supplying power, the secondary power supply circuit and the power management circuit are powered by the high-voltage circuit, the MCU circuit, the storage circuit, the RTC circuit and the collision detection circuit are powered by the secondary power supply circuit, and the first battery data stored in the storage circuit is obtained when the high-voltage power is supplied.
By the mode, even if the low-voltage storage battery is powered down, the first battery data obtained during low-voltage power supply is stored in the storage circuit, and after the low-voltage storage battery is powered back, the first battery data is sent to a vehicle machine in a vehicle through the communication circuit. The battery management system is switched to supply power for the battery management system while avoiding the loss of battery data, so that the battery management system can work normally, the battery data during high-voltage power supply is obtained, the working reliability of the battery management system is improved, and the integrity of the battery data is ensured.
In one embodiment of the invention, the data processing module further comprises: the first switching unit is used for switching the second-stage power supply circuit from the first low-voltage power supply to the first high-voltage power supply if the second switch is in an off state; if the second switch is in an off state, a first switching instruction is generated and sent to the control circuit; if a first feedback signal which is fed back from the control circuit and carries the first battery data to be normal is received, switching the second-stage power supply circuit from the first low-voltage power supply to the first high-voltage power supply, so that the second-stage power supply circuit outputs a second low-voltage current and converts the second low-voltage current into a second high-voltage current; and if a first feedback signal carrying the first battery data abnormality fed back from the control circuit is received, stopping supplying power to the battery management system.
In particular, referring to fig. 5, a flowchart of a battery management system performing a first switch is shown for an exemplary embodiment of the present invention. As shown in fig. 5, when the power battery pack is maintained, and the power battery is changed, and other operations requiring that the power battery is directly separated from the vehicle are performed, the second switch is turned off first, and the power management circuit controls the first switch to be turned on and generates a first switching instruction to be sent to the MCU circuit when detecting that the second switch is turned off. After the first switch is closed, the transformer driving circuit stably outputs a first high-voltage current to the control transformer, at the moment, if the first battery data extracted by the MCU circuit is normal, the power supply of the battery management system is switched from a low-voltage storage battery to a high-voltage storage battery, so that the second high-voltage current is output by the secondary power supply circuit, the first switching is completed, and the second high-voltage current is notified to an internal machine of the vehicle; if the first battery data extracted by the MCU circuit is abnormal, for example, the problem of insulation of the power battery pack, the problem of total voltage overvoltage and undervoltage of the power battery pack and the like, the power supply to the battery management system is stopped, and abnormal data are sent to the vehicle interior machine.
In one embodiment of the invention, the data processing module further comprises: the second switching unit is used for switching the second-stage power supply circuit from the first high-voltage power supply to the first high-voltage power supply if the collision signal is abnormal or the low-voltage storage battery is abnormal; if the first battery data does not have abnormal data, generating a second switching instruction and sending the second switching instruction to the control circuit; if the second feedback information which is fed back from the control circuit and carries collision signals or is still abnormal in the second battery data is received within the preset time, the second-stage power supply circuit is switched from the first low-voltage current power supply to the first high-voltage current power supply, and the second low-voltage current output by the second-stage power supply circuit is converted into the second high-voltage current; if the second feedback information which is fed back from the control circuit and carries collision signals or the second battery data is still abnormal is not received within the preset time, the second-stage power supply circuit is kept to be powered by the first low-voltage current.
In particular, referring to fig. 6, a flow chart of a battery management system performing a second handoff is shown for an exemplary embodiment of the present invention. In the process that the battery management system supplies power by using the low-voltage storage battery, if the collision signal is abnormal or the low-voltage storage battery is powered down abnormally, namely, abnormal signals such as collision, overvoltage and undervoltage of the low-voltage storage battery are detected, and the first battery data are normal, the MCU sends the abnormal signals to the power management circuit so as to control the first switch to be closed through the power management circuit. And the transformer driving circuit is used for controlling the transformer to stably output the first high-voltage current. The power management circuit generates and sends a second switching instruction to the MCU circuit, and at the moment, the MCU circuit judges whether an abnormal signal still exists in preset time, if the abnormal signal does not exist, the power supply is not switched, and the second-stage power supply circuit is kept to be powered by the first low-voltage power supply; if so, switching the power supply.
In one embodiment of the invention, the data processing module further comprises: the third switching unit is used for switching the secondary power supply circuit from the first high-voltage current power supply to the first low-voltage current power supply; generating a third switching instruction and sending the third instruction to the control circuit; if the third feedback information which is fed back from the control circuit and carries the low-voltage storage battery and does not lose power is received, the low-voltage storage battery is normally powered, the second-stage power supply circuit is switched from the first high-voltage power supply to the first low-voltage power supply, and the second-stage power supply circuit outputs the second high-voltage current to be converted into the second low-voltage current; if the third feedback information carrying the power failure of the low-voltage storage battery fed back from the control circuit is received, the power supply of the low-voltage storage battery is abnormal, and the second-level power supply circuit is kept to be powered by the first high-voltage circuit.
In particular, referring to fig. 7, a flowchart of a battery management system performing a third handoff is shown for an exemplary embodiment of the present invention. As shown in fig. 7, after the operation of repairing the power battery pack, changing the power, and the like, which requires the power battery to be directly separated from the vehicle, the power battery pack is reinstalled in the vehicle, and at this time, the low-voltage storage battery is again connected with the primary power supply circuit, and the second switch is closed. After detecting that the second switch is closed, the power supply management circuit generates and sends a third switching instruction to the MCU circuit, at the moment, the MCU circuit detects whether the power supply of the low-voltage storage battery is normal, if so, the primary power supply circuit stably outputs the first low-voltage current, the power supply of the battery management system is switched to the low-voltage storage battery, the secondary power supply circuit outputs the second low-voltage current, the third switching is completed, and the power supply circuit is notified to an internal unit of the vehicle; if the switching failure is abnormal or the first low-voltage current output is abnormal, the MCU circuit sends the switching failure reason to the vehicle interior unit.
Specifically, referring to fig. 8, a flowchart of a battery management system initial power-up is shown according to an exemplary embodiment of the present invention. When the vehicle battery management system is electrified for the first time, the low-voltage storage battery can supply power for the first-stage power supply circuit, the second switch is closed, and then the first low-voltage current is output by the first-stage power supply circuit to supply power for the power management circuit, the second-stage power supply circuit, the communication circuit and the peripheral control circuit, so that the second-stage power supply circuit outputs the second low-voltage current to supply power for the MCU circuit, the collision detection circuit, the storage circuit and the RTC circuit at the rear end of the second-stage power supply circuit. At this time, the MCU circuit will determine whether the power battery pack is connected through the battery detection circuit, if not, record the unconnected time t1 through the RTC circuit, and store in the storage circuit, after the power battery is connected successfully, record the connection time t2, and send t1, t2 to the vehicle interior machine through the MCU circuit by using the communication circuit, thus finish the first power-up.
Through the mode, when the low-voltage storage battery is powered down, the power supply of the battery management system is switched into the power battery pack, and the battery management system can still work normally on the premise of excessive power loss of the power battery, so that the working stability of the battery management system is greatly improved. And the first battery data in low-voltage power supply and high-voltage power supply are stored, so that the battery data loss caused by power failure of the battery management system is avoided, and the integrity of the battery data is ensured.
Referring to fig. 9, a flowchart of a data collection method of a vehicle battery management system according to an exemplary embodiment of the present invention is shown. The method may be applied to the implementation environment shown in fig. 1 and executed specifically by the battery management system 102 in the implementation environment. It should be understood that the method may be applied to other exemplary implementation environments, and the embodiment is not limited to the implementation environments to which the method is applied.
As shown in fig. 9, in an exemplary embodiment, the data collection method of the vehicle battery management system at least includes steps S910 to S940, which are described in detail as follows:
step S910, a control instruction which is generated by a whole vehicle controller and faces to a control object is obtained;
step S920, dividing the input voltage provided by the high-voltage battery module on the vehicle to output a first voltage;
step S930, controlling the switch state of each control object according to the control instruction, forming three different sampling paths to detect the first voltage respectively to obtain the main positive voltage, the main negative voltage and the total voltage, wherein the control objects comprise a first switch, a second switch and a third switch;
in step S940, the closing state of each switch is determined based on the detected main positive voltage, main negative voltage and total voltage to complete the high voltage power-on detection.
It should be noted that, the data collection method of the vehicle battery management system provided by the above embodiment and the vehicle battery management system provided by the above embodiment belong to the same concept, and the specific manner of performing the operation of each step has been described in detail in the circuit embodiment, which is not repeated here.
The embodiment of the invention also provides vehicle equipment, and the vehicle comprises the vehicle battery management system provided by the embodiment, or a data acquisition method using the vehicle battery management system provided by the embodiment.
The embodiment of the invention also provides electronic equipment, which comprises: one or more processors; and a storage device for storing one or more programs, which when executed by the one or more processors, cause the electronic device to implement the data collection method of the vehicle battery management system provided in the above embodiments.
Referring to FIG. 10, a schematic diagram of a computer system suitable for use in implementing an embodiment of the invention is shown. It should be noted that, the computer system 1000 of the electronic device shown in fig. 10 is only an example, and should not impose any limitation on the functions and the application scope of the embodiments of the present invention.
As shown in fig. 10, the computer system 1000 includes a central processing unit (CentralProcessingUnit, CPU) 1001 which can perform various appropriate actions and processes, such as performing the methods in the above-described embodiments, according to a program stored in a Read-only memory (ROM) 1002 or a program loaded from a storage section 1008 into a random access memory (RandomAccessMemory, RAM) 1003. In the RAM1003, various programs and data required for system operation are also stored. The CPU1001, ROM1002, and RAM1003 are connected to each other by a bus 1004. An Input/Output (I/O) interface 1005 is also connected to bus 1004.
The following components are connected to the I/O interface 1005: an input section 1006 including a keyboard, a mouse, and the like; an output portion 1007 including a cathode ray tube (CathodeRayTube, CRT), a liquid crystal display (LiquidCrystalDisplay, LCD), and the like, a speaker, and the like; a storage portion 1008 including a hard disk or the like; and a communication section 1009 including a network interface card such as a LAN (local area network) card, a modem, or the like. The communication section 1009 performs communication processing via a network such as the internet. The drive 1010 is also connected to the I/O interface 1005 as needed. A removable medium 1011, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like, is installed on the drive 1010 as needed, so that a computer program read out therefrom is installed into the storage section 1008 as needed.
In particular, according to embodiments of the present invention, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising a computer program for performing the method shown in the flowchart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication portion 1009, and/or installed from the removable medium 1011. When executed by a Central Processing Unit (CPU) 1001, the computer program performs various functions defined in the system of the present invention.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. It is therefore intended that all equivalent modifications and changes made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the appended claims.
Claims (13)
1. A vehicle battery management system, the system comprising: the device comprises a power supply module, a power management module and a data processing module;
the power supply module comprises a low-voltage power supply unit and a high-voltage power supply unit which are respectively used for supplying power to the battery management system;
the power management circuit is connected with the power supply module and is used for monitoring the power failure condition of the low-voltage storage battery in the low-voltage power supply unit and determining whether to switch the power supply of the power management system or not based on the monitoring result;
the data processing module is connected with the power management circuit and is used for detecting a power battery pack in the high-voltage power supply unit to obtain and store first battery data, wherein if the low-voltage storage battery is not powered down, the low-voltage power supply unit is kept to supply power to the battery management system, the first battery data during low-voltage power supply are obtained, and if the low-voltage storage battery is powered down, the power supply of the battery management system is switched to the high-voltage power supply unit, and the first battery data during high-voltage power supply are obtained.
2. The vehicle battery management system of claim 1, wherein the system further comprises:
the secondary power supply circuit is connected with the power supply module and used for converting the current output by the power supply module so as to supply power to the data processing module according to the converted current;
if the secondary power supply module is powered by the low-voltage power supply unit, voltage stabilization, filtering and rectification are carried out on the first low-voltage power output by the low-voltage power supply unit to obtain a second low-voltage current;
and if the secondary power supply module is powered by the high-voltage power supply unit, the first high-voltage power output by the high-voltage power supply unit is stabilized, filtered and rectified to obtain a second high-voltage current, and high-voltage and low-voltage isolation is arranged between the low-voltage power supply unit and the high-voltage power supply unit.
3. The vehicle battery management system according to claim 2, wherein the high-voltage power supply unit includes: the power battery pack, the transformer driving circuit, the transformer and the first switch;
the first switch is used for connecting the power battery pack with the transformer driving circuit and the power management circuit respectively;
The power battery pack is connected with the first switch and is used for supplying power to the transformer driving circuit;
the transformer driving circuit is connected with the power battery pack and used for generating a driving signal so as to control the transformer to work;
the transformer is used for reducing the current output by the power battery pack according to the driving signal to obtain a first high-voltage current, and supplying power to the power management circuit and the secondary power supply circuit through the first high-voltage current.
4. The vehicle battery management system according to claim 2, wherein the low-voltage power supply unit includes: the low-voltage storage battery, the primary power supply current and the second switch;
the low-voltage storage battery is used for supplying power to the primary power supply circuit;
the primary power supply circuit is connected with the low-voltage storage battery and used for reducing the voltage of the current output by the low-voltage storage battery to obtain a first low-voltage current, and the first low-voltage current is used for supplying power to the power supply management circuit;
and one end of the second switch is connected with the low-voltage storage battery, and the other end of the second switch is connected with the current management circuit and is used for connecting the low-voltage storage battery with the power management circuit so that the power management circuit can obtain second battery data of the low-voltage storage battery and determine the power failure condition of the low-voltage storage battery based on the second battery data.
5. The vehicle battery management system of claim 4, wherein the data processing module comprises:
the battery detection circuit is connected with the power battery pack and is used for detecting physical parameters of each battery cell in the power battery pack, wherein the physical parameters comprise voltage, current and temperature of the battery cell, and the battery detection circuit is powered by the power battery pack;
the control circuit is connected with the battery detection circuit and is used for detecting the power battery according to the physical parameters of all the battery monomers in the power battery, obtaining first battery data of the power battery pack and judging whether the first battery data are abnormal or not, wherein the detection of the power battery comprises insulation detection, balance detection and total voltage detection, and the control circuit is powered by the secondary power supply circuit;
and the storage circuit is connected with the control circuit and used for storing the battery information of the power battery pack obtained by the detection unit, and the storage circuit is powered by the secondary power supply circuit.
6. The vehicle battery management system of claim 5, wherein the system further comprises:
And the collision detection circuit is connected with the control circuit and is used for detecting a collision signal of the vehicle, and the collision signal is sent to the power management circuit through the control circuit.
7. The vehicle battery management system of claim 5, wherein the power management circuit further comprises:
the first switching unit is used for switching the secondary power supply circuit from the first low-voltage power supply to the first high-voltage power supply if the second switch is in an off state;
if the second switch is in an off state, generating the first switching instruction and sending the first switching instruction to the control circuit;
if a first feedback signal which is fed back from the control circuit and carries the first battery data normally is received, switching the second-stage power supply circuit from the first low-voltage power supply to the first high-voltage power supply, and enabling the second-stage power supply circuit to output the second low-voltage current and convert the second low-voltage current into the second high-voltage current;
and if a first feedback signal which is fed back from the control circuit and carries the first battery data abnormality is received, stopping supplying power to the battery management system.
8. The vehicle battery management system of claim 6, wherein the power management circuit further comprises:
the second switching unit is used for switching the secondary power supply circuit from the first low-voltage power supply to the first high-voltage power supply if the collision signal is abnormal or the low-voltage storage battery is abnormal;
if the first battery data are normal, generating a second switching instruction, and sending the second switching instruction to the control circuit;
if the second feedback information which is fed back from the control circuit and carries the collision signal or the second battery data is still abnormal is received within the preset time, the second-stage power supply circuit is switched from the first low-voltage current power supply to the first high-voltage current power supply, so that the second low-voltage current output by the second-stage power supply circuit is converted into the second high-voltage current;
and if the second feedback information which is fed back from the control circuit and carries the collision signal or the second battery data is still abnormal is not received within the preset time, the second-stage power supply circuit is kept to be powered by the first low-voltage power supply.
9. The vehicle battery management system of claim 5, wherein the power management circuit further comprises:
A third switching unit for switching the secondary power supply circuit from the first high-voltage current power supply to the first low-voltage current power supply;
generating a third switching instruction and sending the third instruction to the control circuit;
if receiving third feedback information which is fed back from the control circuit and carries the low-voltage storage battery and does not lose power, the low-voltage storage battery is powered normally, the secondary power supply circuit is switched from the first high-voltage current power supply to the first low-voltage current power supply, and the secondary power supply circuit outputs the second high-voltage current and converts the second high-voltage current into the second low-voltage current;
and if the third feedback information carrying the power failure of the low-voltage storage battery fed back by the control circuit is received, the power supply of the low-voltage storage battery is abnormal, and the second-level power supply circuit is kept to be powered by the first high-voltage circuit.
10. The vehicle battery management system of claim 5, wherein the system further comprises:
the clock circuit is connected with the control circuit and used for recording the switching time of power supply between the low-voltage power supply unit and the second power supply unit and storing the switching time in the storage circuit through the control circuit, and the clock circuit is powered by the secondary power supply circuit;
The communication circuit is respectively connected with the primary power supply circuit and the control circuit and is used for sending the second battery information and the switching time stored in the storage circuit to a vehicle machine in the vehicle through the control circuit, and the communication circuit is powered by the primary power utilization circuit;
the external control circuit is connected with the primary power supply circuit and used for controlling external equipment of the battery management system; the peripheral control circuit is powered by the primary power supply circuit.
11. A method of data collection for a vehicle battery management system, the method comprising:
detecting the power supply condition of a low-voltage storage battery in a vehicle, and determining whether the low-voltage storage battery is powered down, wherein the low-voltage storage battery is used for supplying power to a battery management system in the vehicle;
if the low-voltage storage battery is not powered down, the low-voltage storage battery is kept to supply power for the battery management module so as to acquire data generated by the battery management system during low-voltage power supply;
and if the low-voltage storage battery is powered down, switching a power battery in the vehicle to supply power for the battery management system so as to acquire data generated by the battery management system during high-voltage power supply.
12. A vehicle apparatus, characterized in that the vehicle includes the vehicle battery management system according to any one of claims 1 to 10, or a data collection method employing the vehicle battery management system according to claim 11.
13. An electronic device, comprising:
one or more processors;
storage means for storing one or more programs that, when executed by the one or more processors, cause the electronic device to implement the data collection method of the vehicle battery management system of claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310675013.8A CN116766931A (en) | 2023-06-08 | 2023-06-08 | Vehicle battery management system, data acquisition method and device and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310675013.8A CN116766931A (en) | 2023-06-08 | 2023-06-08 | Vehicle battery management system, data acquisition method and device and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116766931A true CN116766931A (en) | 2023-09-19 |
Family
ID=88012640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310675013.8A Pending CN116766931A (en) | 2023-06-08 | 2023-06-08 | Vehicle battery management system, data acquisition method and device and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116766931A (en) |
-
2023
- 2023-06-08 CN CN202310675013.8A patent/CN116766931A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20240213786A1 (en) | Control method, apparatus, device, storage medium, and program product for energy storage system | |
| US20230202343A1 (en) | Low-voltage battery charging system and method | |
| US11745610B2 (en) | Power conversion device and power transfer system | |
| US7166989B2 (en) | Power supply system for supplying power to an electronic apparatus | |
| CN110601315A (en) | Power supply system and method of high-voltage cable core temperature measurement system | |
| CN211606150U (en) | 12V boats and ships or on-vehicle lithium electricity stand-by power supply with mouthful | |
| CN116766931A (en) | Vehicle battery management system, data acquisition method and device and vehicle | |
| CN116513899A (en) | Elevator power supply control method, system, computer equipment and storage medium | |
| CN109586395A (en) | Uninterrupted power supply intelligently switches and monitoring method | |
| CN115257599A (en) | Power supply method and system for automatic driving vehicle type | |
| WO2018045823A1 (en) | Online ups backup power system based on metal-air battery | |
| CN112977064A (en) | Low-power charging control system and control method for low-voltage storage battery | |
| CN214396484U (en) | Fuel cell delayed power-off control device and system | |
| CN217848982U (en) | Nuclear capacity supplementing device for storage battery | |
| CN115579929B (en) | Control method for improving battery protection of energy storage system | |
| KR102598680B1 (en) | Uninterruptible power supply using recycled lithium ion battery | |
| US20230382328A1 (en) | Power replenishment wake-up apparatus and method for low-voltage battery | |
| CN210577908U (en) | Control battery pack's charge-discharge circuit and battery management system | |
| CN108528227B (en) | Electric automobile range extender control system and control method and electric automobile | |
| EP4277079A1 (en) | Power supply control system and control method thereof | |
| CN113787935A (en) | Power supply system and method of electric automobile, computer equipment, medium and vehicle | |
| CN115663861A (en) | Edge control method and controller for dual-loop UPS (uninterrupted Power supply) system for energy storage of data center | |
| CN118157258A (en) | Lithium battery system and control method | |
| CN118263950A (en) | Low-power-consumption energy storage battery pack system and power consumption reduction method | |
| CN113511108A (en) | Control circuit, method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |