CN112109589A - Battery fault processing method and device, vehicle and storage medium - Google Patents
Battery fault processing method and device, vehicle and storage medium Download PDFInfo
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- CN112109589A CN112109589A CN202011003263.XA CN202011003263A CN112109589A CN 112109589 A CN112109589 A CN 112109589A CN 202011003263 A CN202011003263 A CN 202011003263A CN 112109589 A CN112109589 A CN 112109589A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/13—Maintaining the SoC within a determined range
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/22—Balancing the charge of battery modules
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/549—Current
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Secondary Cells (AREA)
Abstract
The embodiment of the invention discloses a battery fault processing method, a device, a vehicle and a storage medium, wherein the method comprises the following steps: acquiring branch state and residual balance electric quantity of each battery branch in a vehicle battery; when the branch state and the residual balance electric quantity meet the fault balance condition, acquiring the loop state of each balance loop corresponding to the battery branch of which the branch state is the open circuit fault; when the loop state meets the loop balancing condition, the working state of the balancing loop corresponding to the battery branch is controlled according to the bus current of the battery and the balancing current of the balancing loop, so that the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, the problem that the electric quantity among the battery branches cannot be automatically balanced after the open circuit fault of the battery branch is solved, the working state of the balancing loop is controlled through the bus current and the balancing current, the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, the automatic realization is realized, the after-sale maintenance is not needed, and the maintenance time and the maintenance cost are saved.
Description
Technical Field
The embodiment of the invention relates to a battery management technology, in particular to a battery fault processing method, a battery fault processing device, a vehicle and a storage medium.
Background
Along with popularization and application of new energy vehicle types of commercial vehicles, many pure electric commercial vehicles and passenger cars need to use battery packs with higher capacity to meet daily operation. Generally, the battery grouping of the large-capacity battery pack does not adopt the mode of parallel connection and serial connection, but adopts the scheme of serial connection and grouping and then external parallel connection. According to the scheme of firstly connecting in series and then connecting in parallel, the problems of circuit breaking or connection internal resistance increasing and the like can occur to the connector, the copper bar, the maintenance switch, the welding and the like at the parallel connection position in the running process of the vehicle, if the discharging is continuously used, the pressure difference between all branches is increased, the use of the vehicle is influenced, and the consistency and the service life of the interior of the battery are greatly influenced. For the judgment of the branch circuit breaking fault, various schemes can be used for detection and identification, such as branch current detection, voltage detection and comparison of each branch and the like.
For the open circuit fault of the battery branch, the current processing method after the fault is an instrument alarm and slowly limits the battery discharge power to the limping of the whole vehicle, firstly, the safety of the whole vehicle is ensured by the fault post-processing scheme, but the residual electric quantity between the branches in the battery system is different, the reporting of the cascade fault is easily caused, the difficulty of troubleshooting the fault reason is increased, and the user experience is reduced. For the problem of residual electric quantity difference of each branch, although the problem can be solved by performing balance maintenance in the after-sale maintenance process, the balance maintenance enables to increase the maintenance time, so that the after-sale maintenance cost is increased, the after-sale maintenance can not be performed at any time and any place, and the user experience is reduced.
Disclosure of Invention
The invention provides a battery fault processing method, a battery fault processing device, a vehicle and a storage medium, which are used for processing faults in time after the battery is in fault, saving maintenance time and reducing maintenance cost.
In a first aspect, an embodiment of the present invention provides a battery fault processing method, where the battery fault processing method includes:
acquiring branch state and residual balance electric quantity of each battery branch in a vehicle battery;
when the branch state and the residual balance electric quantity meet the fault balance condition, acquiring the loop state of each balance loop corresponding to the battery branch of which the branch state is the open circuit fault;
and when the loop state meets a loop balancing condition, controlling the working state of the balancing loop corresponding to the battery branch according to the bus current of the battery and the balancing current of the balancing loop so as to realize the electric quantity balance among the battery branches after the open circuit fault of the battery occurs.
In a second aspect, an embodiment of the present invention further provides a battery failure processing apparatus, where the battery failure processing apparatus includes:
the first acquisition module is used for acquiring branch states and residual balance electric quantity of each battery branch in the vehicle battery;
the second acquisition module is used for acquiring the loop state of each equalization loop corresponding to the battery branch of which the branch state is the open circuit fault when the branch state and the residual equalization electric quantity meet the fault equalization condition;
and the loop control module is used for controlling the working state of the equalization loop corresponding to the battery branch according to the bus current of the battery and the equalization current of the equalization loop when the loop state meets the loop equalization condition so as to realize the electric quantity balance among the battery branches after the battery has an open circuit fault.
In a third aspect, an embodiment of the present invention further provides a vehicle, including:
the at least two current sensors are respectively used for collecting bus current and balanced current;
one or more controllers;
a storage device for storing one or more programs,
when the one or more programs are executed by the one or more controllers, the one or more controllers are caused to implement a battery failure handling method as in any one of the embodiments of the present invention.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a battery failure processing method according to any one of the embodiments of the present invention.
The embodiment of the invention provides a battery fault processing method, a device, a vehicle and a storage medium, wherein the branch state and the residual balance electric quantity of each battery branch in a vehicle battery are obtained; when the branch state and the residual balance electric quantity meet the fault balance condition, acquiring the loop state of each balance loop corresponding to the battery branch of which the branch state is the open circuit fault; when the loop state meets the loop balancing condition, the working state of the balancing loop corresponding to the battery branch is controlled according to the bus current of the battery and the balancing current of the balancing loop, so that the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, the problem that the electric quantity among the battery branches cannot be automatically balanced after the open circuit fault of the battery branches is solved, whether the electric quantity balance is needed or not is determined by judging the branch state and the residual balancing electric quantity, when the balancing loop meets the loop balancing condition, the working state of the balancing loop corresponding to the battery branch is controlled through the bus current of the battery and the balancing current of the balancing loop, the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, manual triggering is not needed, the vehicle can be automatically realized after being powered on, and specific after-sale maintenance is not needed, the maintenance time is saved, the after-sale maintenance cost is reduced, the vehicle can be powered on and then carried out anytime and anywhere, and the user experience is improved.
Drawings
Fig. 1 is a flowchart of a battery failure processing method according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a multi-branch parallel power battery system according to a first embodiment of the present invention;
fig. 3 is a flowchart of a battery failure processing method according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a battery failure processing apparatus according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a battery failure processing method according to an embodiment of the present invention, where the embodiment is applicable to a case of processing a battery failure, and the method can be executed by a battery failure processing apparatus. Fig. 2 is a schematic structural diagram of a multi-branch parallel power battery system, in which a battery pack (i.e., a battery) includes N battery branches, the N battery branches are connected in parallel to form a power battery of a vehicle, a slave control board controller controls an equalization loop to work to perform electric quantity equalization, and the slave control board controller controls and collects voltages of single battery terminals and determines branch states of the battery branches. The method specifically comprises the following steps:
and step S110, obtaining branch states and residual balance electric quantity of each battery branch in the vehicle battery.
In this embodiment, the vehicle battery refers to a power battery in the vehicle for providing energy to the vehicle, and may be a battery pack; the branch state can be understood as the working state of each battery branch in the battery, for example, an open circuit fault, that is, a fault caused by an open circuit of the battery branch, and after the open circuit fault of the battery branch occurs, the battery branch is an open circuit branch at this time; the remaining balance electric quantity can be understood as the electric quantity which needs to be balanced (consumed) after the power failure of the battery branch.
Specifically, since the battery branch of the vehicle has an open-circuit fault, in the limp process of the whole vehicle by slowly limiting the discharge power of the battery, the battery branch having the open-circuit fault does not work any more, so that the electric quantity between the open-circuit branch having the open-circuit fault and the non-open-circuit branch not having the open-circuit fault is inconsistent, and an electric quantity difference exists. The branch state and the residual balance electric quantity of the battery branch are obtained from a storage space, wherein the storage space can be a local nonvolatile storage space of a vehicle, a cloud platform and the like.
Step S120, judging whether the branch circuit state and the residual balance electric quantity meet the fault balance condition, if so, executing step S130; otherwise, step S160 is executed.
In the present embodiment, the fault balancing condition may be understood as a condition for determining whether the vehicle needs to balance the electric quantity difference between the battery branches.
Optionally, the determining whether the branch state and the remaining balance electric quantity satisfy the fault balance condition may be implemented in the following manner:
and when the branch circuit state is the open circuit fault, if the residual balance electric quantity is 0 or the residual balance electric quantity is greater than a preset electric quantity threshold value, determining that the fault balance condition is met.
In this embodiment, the preset electric quantity threshold may be understood as an electric quantity threshold set in advance according to an actual application scenario, and is used to determine whether the remaining balance electric quantity meets the safety requirement of the battery.
Specifically, the vehicle battery comprises at least one battery branch, and when the branch state of at least one battery branch in each battery branch is an open-circuit fault, whether the battery branches need to be balanced is judged. If the residual balance electric quantity is 0, the vehicle is in a first power-on period after the open circuit fault occurs at the moment, and the over-current balance is not carried out, so that the vehicle is determined to meet the fault balance condition; or if the residual balance electric quantity is larger than the preset electric quantity threshold value, the electric quantity of the vehicle needs to be balanced at the moment, and the fact that the vehicle meets the fault balance condition is determined.
Step S130, obtaining the loop state of each equalization loop corresponding to the battery branch whose branch state is the open circuit fault.
In this embodiment, the balancing circuit can be understood as a circuit connected to the battery cells to consume power, so as to achieve the effect of balancing the power among the battery branches. There may be multiple cells in a battery branch, and each cell corresponds to an equalizing loop. The loop state may be understood as an operating state of the equalization loop, e.g. whether a fault exists in the hardware of the equalization loop, the temperature of the hardware, etc.
Specifically, when the branch state and the remaining balance electric quantity meet the fault balance condition, the loop state of each balance loop corresponding to the battery branch with the branch state being the open circuit fault is acquired from the vehicle controller or the battery management system in a communication data transmission mode.
Step S140, judging whether the loop state meets a loop balance condition, if so, executing step S150; otherwise, step S160 is executed.
In this embodiment, the loop balancing condition may be understood as a condition for determining whether the balancing loop can work normally to balance the electric quantity between the battery branches. For example, the equalization loop has no hardware fault, the hardware of the equalization loop does not exceed the temperature, and the system current of battery charging and discharging is smaller than a certain current threshold. Whether the electric quantity balance can be carried out is determined by judging whether the loop state of the balance loop meets the loop balance condition, the balance loops of all the single batteries in each battery branch with the open circuit fault meet the balance condition, or only one balance loop of one single battery in each battery branch with the open circuit fault meets the balance condition.
In this embodiment, the equalization current may be understood as a current value consumed by each cell branch when the equalization loop operates. The equalizing loop is closed, the working state of the equalizing loop is normal, and the electric quantity among the battery branches is equalized; and the equalizing loop is disconnected, the working state of the equalizing loop is stop working, and the equalization of the electric quantity among the battery branches is stopped.
The bus current of the battery and the balancing current of the balancing circuit can be acquired by a current sensor, such as a hall sensor. The method comprises the steps of determining the electric quantity to be balanced according to a bus battery of a battery, determining the consumption of balanced electric quantity performed by a circuit-breaking branch according to balanced current of a balanced loop, determining whether the battery branch needs to perform electric quantity balancing according to the electric quantity to be balanced and the consumption of the balanced electric quantity, further determining whether the balanced loop needs to work, and realizing the effect of electric quantity balancing by controlling the working state of the balanced loop.
And step S160, finishing the operation.
The embodiment of the invention provides a battery fault processing method, which comprises the steps of obtaining branch states and residual balance electric quantity of battery branches in a vehicle battery; when the branch state and the residual balance electric quantity meet the fault balance condition, acquiring the loop state of each balance loop corresponding to the battery branch of which the branch state is the open circuit fault; when the loop state meets the loop balancing condition, the working state of the balancing loop corresponding to the battery branch is controlled according to the bus current of the battery and the balancing current of the balancing loop, so that the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, the problem that the electric quantity among the battery branches cannot be automatically balanced after the open circuit fault of the battery branches is solved, whether the electric quantity balance is needed or not is determined by judging the branch state and the residual balancing electric quantity, when the balancing loop meets the loop balancing condition, the working state of the balancing loop corresponding to the battery branch is controlled through the bus current of the battery and the balancing current of the balancing loop, the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, manual triggering is not needed, the vehicle can be automatically realized after being powered on, and specific after-sale maintenance is not needed, the maintenance time is saved, the after-sale maintenance cost is reduced, the vehicle can be powered on and then carried out anytime and anywhere, and the user experience is improved.
Example two
Fig. 3 is a flowchart of a battery fault processing method according to a second embodiment of the present invention. The technical scheme of the embodiment is further refined on the basis of the technical scheme, and specifically mainly comprises the following steps:
and step S210, when the situation that the branch circuit of the battery branches is broken is monitored, the branch state of each battery branch is determined and stored according to a preset diagnosis strategy.
In the present embodiment, the preset diagnosis strategy may be understood as a preset method for detecting open circuit and short circuit of the battery branch, for example, according to voltage.
In the running process of the vehicle, if the situation that the branch circuit of the battery branch circuit is broken is monitored, the branch circuit state of each battery branch circuit is diagnosed according to a preset diagnosis strategy, and the serial number of the battery branch circuit with the broken circuit are determined and stored, so that the vehicle can carry out electric quantity balance according to the branch circuit state of the battery branch circuit after maintenance. The storage can be that the branch circuit is stored after the branch circuit break is monitored, at the moment, the branch circuit break is also avoided after the storage, and the branch circuit state of the battery branch circuit can be detected once at intervals before the key door of the vehicle is powered off; the branch state of each battery branch can be stored before the key door is powered off, namely when the key door is monitored to be powered off, the controller is powered off after the storage is finished, and the branch state can be stored in a nonvolatile storage space or a cloud platform.
And S220, acquiring branch states and residual balance electric quantity of each battery branch in the vehicle battery.
Step S230, determining whether the branch state and the remaining balance power satisfy a fault balance condition, if yes, executing step S240; otherwise, step S293 is executed.
Step S240, obtaining the loop state of each equalization loop corresponding to the battery branch whose branch state is the open circuit fault.
Step S250, judging whether the loop state meets loop balance conditions, if so, executing step S260; otherwise, step S293 is executed.
And step S260, determining the electric quantity to be balanced of the non-open circuit branch in the battery branches according to the bus current of the battery.
In this embodiment, the equalization-needed power may be understood as power needed to be equalized by the non-open circuit branch. And charging and discharging bus current (namely total current) of the battery at ampere-hour accumulation to obtain the electric quantity required to be balanced by the non-broken circuit branch, namely the electric quantity required to be balanced.
Optionally, determining the electric quantity to be equalized of the non-open circuit branch in the battery branch according to the bus current of the battery may be implemented by:
and determining the electric quantity to be balanced according to the number of parallel branches in the battery, the number of open circuit branches and the combination of the bus current and a preset formula.
In the embodiment, the battery of the vehicle is a battery pack composed of a plurality of single batteries, and the number of parallel branches can be understood as the number of parallel branches of each battery constituting the battery pack; the number of open circuit branches can be understood as the number of open circuit branches in which an open circuit fault occurs; the preset formula can be understood as a preset formula for calculating the required balance electric quantity. And (4) bringing the number of parallel branches, the number of open circuit branches and the bus current in the battery into a preset formula, and calculating to obtain the electric quantity to be balanced.
Illustratively, the battery is composed of N branches which are connected in parallel, when the battery branches are monitored to have faults, the branch state of the A battery branches is determined to be an open circuit fault, and at the moment, the N-A battery branches carry out subsequent battery discharging work until A battery system of the vehicle is maintained. The embodiment of the application provides a preset formula for calculating the electric quantity to be equalized:
And step S270, determining the balance electric quantity of a broken circuit branch in the battery branches according to the balance current of the balance loop.
In this embodiment, the equalization electric quantity may be understood as an electric quantity equalized by the equalization loop. And determining the balance electric quantity consumed by the balance loop corresponding to the broken branch circuit through the balance current of the balance loop.
Optionally, determining the equalizing electric quantity of the open branch in the battery branches according to the equalizing current of the equalizing loop may be implemented by:
and performing time integration on the balance current to obtain the balance electric quantity.
For example, the embodiment of the present application provides a formula for calculating the balance electric quantity:
In this embodiment, step S260 and step S270 do not have a sequential order in execution, may be performed simultaneously, or may be performed sequentially, and this embodiment of the present application takes the example of performing step S260 first and then performing step S270, and this embodiment of the present application does not limit this specific execution order.
And step S280, determining the difference value between the balance power quantity to be balanced and the balance power quantity as the current remaining balance power quantity.
Step S290, determining whether the current remaining balance power is greater than the preset power threshold, if so, executing step S291; otherwise, step S292 is executed.
And S291, controlling the working state of the equalization loop corresponding to the battery branch to be open.
And step S292, controlling the working state of the equalization loop corresponding to the battery branch circuit to be stopped.
In this embodiment, the current remaining balance power may be understood as the remaining balance power in the current collection (or calculation) period. And calculating a difference value between the electric quantity to be equalized and the equalized electric quantity, and taking the difference value as the current remaining equalized electric quantity, namely the electric quantity of the battery which needs to be equalized at present. If the current remaining balance electric quantity is larger than a preset electric quantity threshold value, the balance is not completed at the moment, the battery still needs to work in a balance loop to realize the electric quantity balance of the circuit, so that the working state of the balance loop corresponding to the battery branch is controlled to be open working, namely after the battery branch is determined to have an open circuit fault, if the branch state and the remaining balance electric quantity meet a fault balance condition and the loop state of the balance loop meets a loop balance condition, and if the battery branch still needs to balance the electric quantity after the current remaining balance electric quantity is calculated, the balance loop corresponding to each battery branch with the open circuit fault is controlled to work; and if the battery does not need to balance the electric quantity, controlling each balance loop to stop working.
Step S293 ends this operation.
Optionally, the method further includes: and when the power-off of the vehicle is monitored, storing the current residual balance electric quantity so as to update the residual balance electric quantity.
In the vehicle power-on period, if the equalization loop in the vehicle is working to perform power equalization, the power equalization may be completed before the vehicle is powered off, or the power equalization may not be completed before the vehicle is powered off, and at this time, the vehicle is powered on again after being powered off, and whether the equalization needs to be continued or not needs to be performed. Therefore, when the power-off of the vehicle is monitored, the current residual balance electric quantity is stored to update the residual balance electric quantity, and therefore when the vehicle is powered on next time, whether the battery electric quantity balance of the vehicle is needed or not is judged according to the last (latest) stored residual balance electric quantity. The current remaining balance power can be stored in a nonvolatile storage space optionally, and can also be stored on a cloud platform.
The embodiment of the invention provides a battery fault processing method, which comprises the steps of obtaining branch states and residual balance electric quantity of battery branches in a vehicle battery; when the branch state and the residual balance electric quantity meet the fault balance condition, acquiring the loop state of each balance loop corresponding to the battery branch of which the branch state is the open circuit fault; when the loop state meets the loop balancing condition, the working state of the balancing loop corresponding to the battery branch is controlled according to the bus current of the battery and the balancing current of the balancing loop, so that the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, the problem that the electric quantity among the battery branches cannot be automatically balanced after the open circuit fault of the battery branches is solved, whether the electric quantity balance is needed or not is determined by judging the branch state and the residual balancing electric quantity, when the balancing loop meets the loop balancing condition, the working state of the balancing loop corresponding to the battery branch is controlled through the bus current of the battery and the balancing current of the balancing loop, the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, manual triggering is not needed, the vehicle can be automatically realized after being powered on, and specific after-sale maintenance is not needed, the maintenance time is saved, the after-sale maintenance cost is reduced, the vehicle can be powered on and then carried out anytime and anywhere, and the user experience is improved.
EXAMPLE III
Fig. 4 is a structural diagram of a battery failure processing apparatus according to a third embodiment of the present invention, where the apparatus includes: a first acquisition module 31, a second acquisition module 32, and a loop control module 33.
The first obtaining module 31 is configured to obtain a branch state and a remaining balance electric quantity of each battery branch in a vehicle battery; a second obtaining module 32, configured to obtain a loop state of each equalization loop corresponding to the battery branch of which the branch state is the open circuit fault when the branch state and the remaining equalization electric quantity meet the fault equalization condition; and the loop control module 33 is configured to control the working state of the equalization loop corresponding to the battery branch according to the bus current of the battery and the equalization current of the equalization loop when the loop state meets a loop equalization condition, so as to achieve electric quantity balance among the battery branches after an open circuit fault occurs in the battery.
The embodiment of the invention provides a battery fault processing device, which is used for obtaining branch states and residual balance electric quantity of battery branches in a vehicle battery; when the branch state and the residual balance electric quantity meet the fault balance condition, acquiring the loop state of each balance loop corresponding to the battery branch of which the branch state is the open circuit fault; when the loop state meets the loop balancing condition, the working state of the balancing loop corresponding to the battery branch is controlled according to the bus current of the battery and the balancing current of the balancing loop, so that the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, the problem that the electric quantity among the battery branches cannot be automatically balanced after the open circuit fault of the battery branches is solved, whether the electric quantity balance is needed or not is determined by judging the branch state and the residual balancing electric quantity, when the balancing loop meets the loop balancing condition, the working state of the balancing loop corresponding to the battery branch is controlled through the bus current of the battery and the balancing current of the balancing loop, the electric quantity balance among the battery branches after the open circuit fault of the battery is realized, manual triggering is not needed, the vehicle can be automatically realized after being powered on, and specific after-sale maintenance is not needed, the maintenance time is saved, the after-sale maintenance cost is reduced, the vehicle can be powered on and then carried out anytime and anywhere, and the user experience is improved.
Further, the apparatus further comprises:
and the state determining module is used for determining and storing the branch state of each battery branch according to a preset diagnosis strategy when the situation that the battery branches are in branch circuit breaking is monitored.
Further, the apparatus further comprises: and the judging module is used for judging whether the branch state and the residual balance electric quantity meet the fault balance condition.
Further, the determining module is specifically configured to determine that a fault balance condition is satisfied if the remaining balance electric quantity is 0 or the remaining balance electric quantity is greater than a preset electric quantity threshold when the branch state is an open circuit fault.
Further, the loop control module 33 includes:
the balancing required electric quantity determining unit is used for determining the balancing required electric quantity of the non-open circuit branch in the battery branches according to the bus current of the battery;
the equalizing electric quantity determining unit is used for determining the equalizing electric quantity of a broken branch in the battery branches according to the equalizing current of the equalizing loop;
and the control unit is used for determining that the difference value between the electric quantity to be equalized and the equalizing electric quantity is the current residual equalizing electric quantity, and controlling the working state of the equalizing loop corresponding to the battery branch circuit to be open work if the current residual equalizing electric quantity is greater than the preset electric quantity threshold value.
And further, the electric quantity to be balanced determining unit is specifically used for determining the electric quantity to be balanced according to the number of parallel branches in the battery, the number of open-circuit branches and the combination of a preset formula and the bus current.
Further, the equalization electric quantity determining unit is specifically configured to perform time integration on the equalization current to obtain the equalization electric quantity.
Further, the apparatus further comprises:
and the updating module is used for storing the current residual balance electric quantity when the power-off of the vehicle is monitored so as to update the residual balance electric quantity.
The battery fault processing device provided by the embodiment of the invention can execute the battery fault processing method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
Fig. 5 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present invention, and as shown in fig. 5, the vehicle includes a controller 40, a memory 41, an input device 42, an output device 43, and a current sensor 44; the number of the controllers 40 in the vehicle may be one or more, and the number of the current sensors 44 is at least two, and fig. 5 illustrates one controller 40 and two current sensors 44 as an example; the controller 40, the memory 41, the input device 42, and the output device 43 in the vehicle may be connected by a bus or other means, and the bus connection is exemplified in fig. 5.
A current sensor 44 for collecting bus current and balance current, respectively; the memory 41, as a computer-readable storage medium, may be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the battery failure processing method in the embodiment of the present invention (for example, the first acquiring module 31, the second acquiring module 32, and the loop control module 33 in the battery failure processing apparatus). The controller 40 executes various functional applications and data processing of the vehicle, that is, implements the above-described battery failure processing method, by executing software programs, instructions, and modules stored in the memory 41.
The memory 41 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 41 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 41 may further include memory located remotely from controller 40, which may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 42 is operable to receive input numeric or character information and to generate key signal inputs relating to user settings and function controls of the vehicle. The output device 43 may include a display device such as a display screen.
EXAMPLE five
An embodiment of the present invention further provides a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a battery failure processing method, including:
acquiring branch state and residual balance electric quantity of each battery branch in a vehicle battery;
when the branch state and the residual balance electric quantity meet the fault balance condition, acquiring the loop state of each balance loop corresponding to the battery branch of which the branch state is the open circuit fault;
and when the loop state meets a loop balancing condition, controlling the working state of the balancing loop corresponding to the battery branch according to the bus current of the battery and the balancing current of the balancing loop so as to realize the electric quantity balance among the battery branches after the open circuit fault of the battery occurs.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the method operations described above, and may also perform related operations in the battery failure processing method provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the battery failure processing apparatus, the included units and modules are only divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A battery fault handling method, comprising:
acquiring branch state and residual balance electric quantity of each battery branch in a vehicle battery;
when the branch state and the residual balance electric quantity meet the fault balance condition, acquiring the loop state of each balance loop corresponding to the battery branch of which the branch state is the open circuit fault;
and when the loop state meets a loop balancing condition, controlling the working state of the balancing loop corresponding to the battery branch according to the bus current of the battery and the balancing current of the balancing loop so as to realize the electric quantity balance among the battery branches after the open circuit fault of the battery occurs.
2. The method according to claim 1, wherein before the obtaining the branch status and the remaining balance capacity of each battery branch in the vehicle battery, the method further comprises:
and when the situation that the branch circuit breaking of the battery branches occurs is monitored, the branch state of each battery branch is determined and stored according to a preset diagnosis strategy.
3. The method of claim 1, wherein determining whether the branch circuit status and the remaining balance power satisfy a fault balance condition comprises:
and when the branch circuit state is a broken circuit fault, if the residual balance electric quantity is 0 or the residual balance electric quantity is greater than a preset electric quantity threshold value, determining that a fault balance condition is met.
4. The method according to claim 1, wherein the controlling the working state of the equalization loop corresponding to the battery branch according to the bus current of the battery and the equalization current of the equalization loop comprises:
determining the electric quantity to be balanced of a non-open circuit branch in the battery branches according to the bus current of the battery;
determining the balance electric quantity of a broken circuit branch in the battery branches according to the balance current of the balance loop;
and determining that the difference value between the electric quantity to be equalized and the equalizing electric quantity is the current residual equalizing electric quantity, and if the current residual equalizing electric quantity is larger than the preset electric quantity threshold, controlling the working state of the equalizing loop corresponding to the battery branch circuit to be open work.
5. The method according to claim 4, wherein the determining the balance-needed electric quantity of the non-open branch in the battery branches according to the bus current of the battery comprises:
and determining the electric quantity to be balanced according to the number of parallel branches in the battery, the number of open circuit branches and the combination of the bus current and a preset formula.
6. The method of claim 4, wherein determining the equalization charge of a broken branch of the battery branches from the equalization current of the equalization loop comprises:
and performing time integration on the balance current to obtain the balance electric quantity.
7. The method of claim 4, further comprising:
and when the power-off of the vehicle is monitored, storing the current residual balance electric quantity so as to update the residual balance electric quantity.
8. A battery fault handling device, comprising:
the first acquisition module is used for acquiring branch states and residual balance electric quantity of each battery branch in the vehicle battery;
the second acquisition module is used for acquiring the loop state of each equalization loop corresponding to the battery branch of which the branch state is the open circuit fault when the branch state and the residual equalization electric quantity meet the fault equalization condition;
and the loop control module is used for controlling the working state of the equalization loop corresponding to the battery branch according to the bus current of the battery and the equalization current of the equalization loop when the loop state meets the loop equalization condition so as to realize the electric quantity balance among the battery branches after the battery has an open circuit fault.
9. A vehicle, characterized in that the vehicle comprises:
the at least two current sensors are respectively used for collecting bus current and balanced current;
one or more controllers;
a storage device for storing one or more programs,
when executed by the one or more controllers, cause the one or more controllers to implement a battery fault handling method as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a battery failure handling method according to any one of claims 1 to 7.
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