CN107487199B - Battery management system and method for processing residual electric quantity of electric vehicle battery - Google Patents
Battery management system and method for processing residual electric quantity of electric vehicle battery Download PDFInfo
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- CN107487199B CN107487199B CN201610861345.5A CN201610861345A CN107487199B CN 107487199 B CN107487199 B CN 107487199B CN 201610861345 A CN201610861345 A CN 201610861345A CN 107487199 B CN107487199 B CN 107487199B
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- 238000004364 calculation method Methods 0.000 claims description 8
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- 230000000694 effects Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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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]
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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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Abstract
The invention discloses a battery management system and a method for processing the residual electric quantity of an electric vehicle battery. Wherein, this battery management system includes: the receiving module is used for receiving an input emergency instruction under the condition that the residual electric quantity of the battery of the electric vehicle is lower than a preset value, wherein the residual electric quantity is an electric quantity value determined based on the currently set working range of the battery; and the processing module is used for increasing the currently set working range of the battery to a limit range according to the emergency instruction so as to prolong the working time of the battery of the electric vehicle. The invention solves the technical problem that the battery of the electric vehicle in the prior art can not meet the requirement of full power usage on the basis of ensuring the service life of the battery.
Description
Technical Field
The invention relates to the field of electric vehicles, in particular to a battery management system and a method for processing the residual capacity of an electric vehicle battery.
Background
At present, power batteries used in electric vehicles (pure electric and hybrid power) mainly comprise lithium ion batteries, and according to the working characteristics of the lithium ion batteries, the discharge power of the lithium ion batteries cannot meet the power performance requirement of the whole vehicle in a low residual electricity SOC state, so that part of the electric vehicles forbid the use of a battery system in the low SOC state. Under this application, not only can guarantee electric automobile's power performance, still be favorable to promoting battery system's cycle life.
Although the service life of the battery system and the power performance of the electric vehicle are good in the scheme, the electric quantity of the battery system in a low SOC state is unavailable, and the full-charge use cannot be met.
The problem that the full-capacity use of the battery of the electric vehicle in the prior art cannot be met on the basis of guaranteeing the service life of the battery is solved, and an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a battery management system and a method for processing the residual electric quantity of an electric vehicle battery, which at least solve the technical problem that the electric vehicle battery in the prior art can not meet the requirement of full-charge use on the basis of ensuring the service life of the battery.
According to an aspect of an embodiment of the present invention, there is provided a battery management system including: the receiving module is used for receiving an input emergency instruction under the condition that the residual electric quantity of the battery of the electric vehicle is lower than a preset value, wherein the residual electric quantity is an electric quantity value determined based on the currently set working range of the battery; and the processing module is used for increasing the currently set working range of the battery to a limit range according to the emergency instruction so as to prolong the working time of the battery of the electric vehicle.
Further, the battery management system further includes: the first acquisition module is used for acquiring the maximum use range of the electric vehicle battery; the first calculation module is used for calculating and obtaining a limit range according to the performance of the electric vehicle battery and the maximum use range of the electric vehicle battery.
Further, the battery management system is used for receiving an emergency instruction sent by the whole vehicle manager, wherein the whole vehicle manager receives the emergency instruction through a hard wire or a CAN bus.
Further, the battery management system is also used for receiving emergency instructions through a hard wire or a CAN bus.
Further, the battery management system further includes: the second acquisition module is used for acquiring the normal use range of the electric vehicle battery; and the second calculation module is used for calculating to obtain the currently set battery working range according to the performance of the electric vehicle battery and the normal use range of the electric vehicle battery.
According to another aspect of the embodiments of the present invention, there is also provided a method for processing remaining capacity of a battery of an electric vehicle, including: under the condition that the residual electric quantity of the battery of the electric vehicle is lower than a preset value, the battery management system receives an input emergency instruction, wherein the residual electric quantity is an electric quantity value determined based on the currently set battery working range; and the battery management system increases the currently set battery working range to a limit range according to the emergency instruction so as to prolong the working time of the battery of the electric vehicle.
Further, before the battery management system increases the currently set battery operating range to the limit range according to the emergency instruction, the method further includes: the battery management system acquires the maximum use range of the electric vehicle battery; and the battery management system calculates to obtain a limit range according to the performance of the electric vehicle battery and the maximum use range of the electric vehicle battery.
Further, the battery management system receiving the input emergency command comprises: the whole vehicle controller receives an emergency instruction through a hard line or a CAN bus; and the vehicle control unit sends the received emergency instruction to the battery management system.
Further, the battery management system receiving the input emergency command comprises: the battery management system receives the emergency instruction through a hard line or a CAN bus.
According to another aspect of the embodiments of the present invention, there is also provided an electric vehicle including: the battery management system of any of the above embodiments.
In the embodiment of the invention, under the condition that the residual electric quantity of the electric vehicle battery is lower than the preset value, the battery management system receives the input emergency instruction, and the currently set working range of the battery is increased to the limit range according to the emergency instruction so as to prolong the working time of the electric vehicle battery, thereby realizing setting a smaller working range of the battery under the normal condition, ensuring the service life of the electric vehicle battery, and under the emergency condition, the protection residual electric quantity of the electric vehicle battery can be used through the emergency instruction, the full-electric-quantity use of the electric vehicle battery is met, and the technical problem that the full-electric-quantity use of the electric vehicle battery in the prior art cannot be met on the basis of ensuring the service life of the battery is. Therefore, through the scheme provided by the embodiment of the invention, the effects that the battery of the electric vehicle can be fully used in an emergency, the working time of the battery of the electric vehicle is prolonged, and the user friendliness is improved can be achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of a battery management system according to an embodiment of the present invention; and
fig. 2 is a flowchart of a method for processing remaining capacity of a battery of an electric vehicle according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the following, related art terms related to embodiments of the present invention are first explained to facilitate understanding of the embodiments of the present invention
SOC: state of Charge, also called the amount of remaining Charge, represents the ratio of the remaining capacity of a battery after it has been used for a period of time or left unused for an extended period of time to its capacity in its fully charged State, expressed as a percentage.
A battery management system: BMS, the abbreviation of Battery Management System, is the important tie of connecting on-vehicle power Battery and electric automobile, and its main function includes: monitoring physical parameters of the battery in real time; estimating the state of the battery; online diagnosis and early warning; charging, discharging and pre-charging control; balance management, thermal management, and the like.
The vehicle control unit: the VMS, a shorthand of the Vehicle Management System, namely a power assembly controller, is a core control component of the whole electric automobile and CAN be connected with a CAN network of the whole automobile through a CAN bus.
CAN: the Controller Area Network, which is abbreviated as Controller Area Network, is an international standard high-cost field bus, is a multi-master serial communication bus, and has high real-time performance.
Example 1
According to an embodiment of the present invention, a production embodiment of a battery management system is provided.
Fig. 1 is a schematic diagram of a battery management system according to an embodiment of the present invention, as shown in fig. 1, the battery management system including:
the receiving module 11 is configured to receive an input emergency instruction by the battery management system when a remaining power of a battery of the electric vehicle is lower than a preset value, where the remaining power is a power value determined based on a currently set battery working range.
Specifically, the electric vehicle may be an electric vehicle, such as a pure electric vehicle and a hybrid electric vehicle. The electric vehicle battery can be a power battery of an electric vehicle. The currently set battery operating range may be the available SOC determined by the battery management systemB. The preset value may be set according to a currently set battery working range, for example, if the currently set battery working range is 0% to 100%, the preset value may be set to 0%. The remaining capacity of the electric vehicle battery may be a remaining capacity displayed to a user, and is not an actual remaining capacity of the electric vehicle battery. The above limit range is used to represent the maximum use range (i.e., 0% -100%) of the electric vehicle battery.
And the processing module 13 is used for increasing the currently set battery working range to a limit range by the battery management system according to the emergency instruction so as to prolong the working time of the electric vehicle battery.
Specifically, the limit range may be a range determined according to an actual SOC of the power battery, and when the battery operating range is expanded to the limit range, the remaining capacity of the originally unusable electric vehicle battery may be used, and the remaining capacity displayed to the user may also be changed, for example, the remaining capacity displayed to the user may be 0% before the battery operating range is expanded, and the remaining capacity displayed to the user may be changed to 20% after the battery operating range is expanded.
In an optional scheme, when a user checks that the displayed residual electric quantity is low and is lower than a preset value, if the user cannot charge the electric vehicle in time at the moment and needs to continue using the electric vehicle, the user can generate an emergency instruction through the trigger control device, and after the battery management system receives the emergency instruction, the currently set working range of the battery can be increased to a limit range, so that the residual electric quantity of the power battery which cannot be used under normal conditions can be used, the working duration of the power battery is prolonged, and the user can continue using the electric vehicle.
It should be noted here that the device for processing the remaining capacity of the battery of the electric vehicle may be a battery management system of the electric vehicle.
According to the embodiment of the invention, under the condition that the residual electric quantity of the electric vehicle battery is lower than the preset value, the battery management system receives the input emergency instruction, and the currently set battery working range is increased to the limit range according to the emergency instruction so as to prolong the working time of the electric vehicle battery, so that the smaller battery working range is set under the normal condition, the service life of the electric vehicle battery is ensured, and under the emergency condition, the residual electric quantity protection of the electric vehicle battery can be used through the emergency instruction, the full-electric-quantity use of the electric vehicle battery is met, and the technical problem that the full-electric-quantity use of the electric vehicle battery in the prior art cannot be met on the basis of ensuring the service life of the battery is solved. Therefore, through the scheme provided by the embodiment of the invention, the effects that the battery of the electric vehicle can be fully used in an emergency, the working time of the battery of the electric vehicle is prolonged, and the user friendliness is improved can be achieved.
Optionally, according to the above embodiment of the present invention, the battery management system further includes:
the first obtaining module is used for obtaining the maximum use range of the electric vehicle battery.
Specifically, the maximum usage range may be a usage range of a full charge of the power battery, that is, a range of an actual SOC is 0% to 100%.
The first calculation module is used for calculating the limit range according to the performance of the electric vehicle battery and the maximum use range of the electric vehicle battery by the battery management system.
In an optional scheme, when the user checks that the displayed remaining power is lower than the preset value, if the user cannot charge the electric vehicle in time and needs to continue using the electric vehicle, the battery management system can calculate the available SOC based on the performance of the power battery and the actual SOC rangeBFor example, the actual SOC ranges from 0% to 100%, and the available SOC can be calculatedBThe range of (A) is-25% to 100%.
Optionally, according to the above embodiment of the present invention, the battery management system is configured to receive an emergency instruction sent by the entire vehicle manager, where the entire vehicle manager receives the emergency instruction through a hard wire or a CAN bus.
In an optional scheme, when a user checks that the displayed remaining power is lower than a preset value, if the user cannot charge the electric vehicle in time and needs to continue to use the electric vehicle, the user can send an emergency instruction to a vehicle management system (BMS) through hard-wired control, namely through a hard wire, and the vehicle management system (BMS) sends the instruction to the VMS; alternatively, the user may send the emergency command to the vehicle management system (BMS) through signal control, i.e., the CAN bus, and the vehicle management system (BMS) sends the command to the Vehicle Management System (VMS). After receiving the emergency instruction, the battery management system may increase the currently set battery operating range to the limit range.
It should be noted that, if the user sends the emergency command to the vehicle controller through the hard wire, the hard wire needs to be added in the electric vehicle to connect with the vehicle controller, and the emergency command is transmitted through the hard wire, so that the accuracy is high.
Optionally, according to the above embodiment of the present invention, the battery management system is further configured to receive an emergency instruction through a hard wire or a CAN bus.
In an optional scheme, when a user checks that the displayed remaining power is lower than a preset value, if the user cannot charge the electric vehicle in time and needs to continue using the electric vehicle, the user can directly send an emergency instruction to a Battery Management System (BMS) through hard-wired control, namely through a hard wire; alternatively, the user may send the emergency command directly to a Battery Management System (BMS) through a signal control, i.e., a CAN bus. After receiving the emergency instruction, the battery management system may increase the currently set battery operating range to the limit range.
It should be noted here that if the user sends the emergency command to the battery management system through a hard wire, the electric vehicle needs to be additionally connected with the battery management system through a hard wire, and the emergency command is transmitted through hard wire control, so that the accuracy is high.
Optionally, according to the above embodiment of the present invention, after receiving the emergency instruction, the battery management system increases the currently set battery working range to the limit range according to the preset policy.
Specifically, the preset policy may be a software policy, and the currently set battery operating range may be expanded through the software policy.
In an alternative scheme, after receiving the emergency command, the Battery Management System (BMS) may increase the currently set battery operating range to a limit range through a software policy, for example, the currently set battery operating range is 0% to 100%, the limit range is-25% to 100%, and the Battery Management System (BMS) may allow the SOC to be allowable through the software policyBThe application range is-25% -100%.
Optionally, according to the above embodiment of the present invention, the battery management system further includes:
and the second acquisition module is used for acquiring the normal use range of the electric vehicle battery.
Specifically, the normal use range may be an operating range of the actual SOC of the power battery, for example, the operating range of the actual SOC may be 20% to 100%.
And the second calculation module is used for calculating the current set battery working range according to the performance of the electric vehicle battery and the normal use range of the electric vehicle battery by the battery management system.
In an alternative scheme, when the electric vehicle is in normal operation, that is, the power battery is not fully used, the battery management system may calculate the available SOC based on the performance of the power battery and the range of the actual SOCBFor example, the actual SOC is in the range of 20% to 100%, and the available SOC can be obtained by calculationBThe range of (A) is 0% to 100%.
Optionally, according to the above embodiment of the present invention, if the remaining capacity of the electric vehicle battery is lower than the preset value, the electric vehicle battery stops working.
In an alternative scheme, when the electric vehicle is in normal operation, that is, the power battery is not fully used, when the remaining capacity of the battery of the electric vehicle is lower than a preset value, the electric vehicle cannot run and needs to be charged, for example, when the SOC is lowBWhen the percentage is 0%, the electric vehicle cannot run and needs to be charged.
Example 2
There is also provided, in accordance with an embodiment of the present invention, a method embodiment of a method for processing remaining capacity of a battery of an electric vehicle, it is noted that the steps illustrated in the flowchart of the accompanying drawings may be implemented in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different than here.
Fig. 2 is a flowchart of a method for processing remaining capacity of a battery of an electric vehicle according to an embodiment of the present invention, as shown in fig. 2, the method includes the steps of:
step S202, the battery management system receives an input emergency instruction when the remaining capacity of the battery of the electric vehicle is lower than a preset value, wherein the remaining capacity is a capacity value determined based on the currently set battery working range.
Specifically, the electric vehicle may be an electric vehicle, such as a pure electric vehicle and a hybrid electric vehicle. The electric vehicle battery can be a power battery of an electric vehicle. The currently set battery operating range may be the available SOC determined by the battery management systemB. The above-mentioned preset value canThe setting is performed according to the currently set battery working range, for example, if the currently set battery working range is 0% to 100%, the preset value may be set to 0%. The remaining capacity of the electric vehicle battery may be a remaining capacity displayed to a user, and is not an actual remaining capacity of the electric vehicle battery. The above limit range is used to represent the maximum use range (i.e., 0% -100%) of the electric vehicle battery.
And step S204, the battery management system increases the currently set battery working range to a limit range according to the emergency instruction so as to prolong the working time of the battery of the electric vehicle.
Specifically, the limit range may be a range determined according to an actual SOC of the power battery, and when the battery operating range is expanded to the limit range, the remaining capacity of the originally unusable electric vehicle battery may be used, and the remaining capacity displayed to the user may also be changed, for example, the remaining capacity displayed to the user may be 0% before the battery operating range is expanded, and the remaining capacity displayed to the user may be changed to 20% after the battery operating range is expanded.
In an optional scheme, when a user checks that the displayed residual electric quantity is low and is lower than a preset value, if the user cannot charge the electric vehicle in time at the moment and needs to continue using the electric vehicle, the user can generate an emergency instruction through the trigger control device, and after the battery management system receives the emergency instruction, the currently set working range of the battery can be increased to a limit range, so that the residual electric quantity of the power battery which cannot be used under normal conditions can be used, the working duration of the power battery is prolonged, and the user can continue using the electric vehicle.
According to the embodiment of the invention, under the condition that the residual electric quantity of the electric vehicle battery is lower than the preset value, the battery management system receives the input emergency instruction, and the currently set battery working range is increased to the limit range according to the emergency instruction so as to prolong the working time of the electric vehicle battery, so that the smaller battery working range is set under the normal condition, the service life of the electric vehicle battery is ensured, and under the emergency condition, the residual electric quantity protection of the electric vehicle battery can be used through the emergency instruction, the full-electric-quantity use of the electric vehicle battery is met, and the technical problem that the full-electric-quantity use of the electric vehicle battery in the prior art cannot be met on the basis of ensuring the service life of the battery is solved. Therefore, through the scheme provided by the embodiment of the invention, the effects that the battery of the electric vehicle can be fully used in an emergency, the working time of the battery of the electric vehicle is prolonged, and the user friendliness is improved can be achieved.
Optionally, according to the above embodiment of the present invention, before the battery management system increases the current battery operating range to the limit range according to the emergency instruction in step S204, the method further includes:
in step S212, the battery management system obtains the maximum usage range of the electric vehicle battery.
Specifically, the maximum usage range may be a usage range of a full charge of the power battery, that is, a range of an actual SOC is 0% to 100%.
And step S214, calculating a limit range by the battery management system according to the performance of the electric vehicle battery and the maximum use range of the electric vehicle battery.
In an optional scheme, when the user checks that the displayed remaining power is lower than the preset value, if the user cannot charge the electric vehicle in time and needs to continue using the electric vehicle, the battery management system can calculate the available SOC based on the performance of the power battery and the actual SOC rangeBFor example, the actual SOC ranges from 0% to 100%, and the available SOC can be calculatedBThe range of (A) is-25% to 100%.
Optionally, according to the above embodiment of the present invention, in step S202, the receiving, by the battery management system, the input emergency instruction includes:
step S222, generating an emergency instruction through hard-line control or signal control.
And S224, sending the emergency command to the vehicle control unit.
And step S226, the vehicle control unit sends the emergency instruction to the battery management system.
In an optional scheme, when a user checks that the displayed remaining power is lower than a preset value, if the user cannot charge the electric vehicle in time and needs to continue to use the electric vehicle, the user can send an emergency instruction to a vehicle management system (BMS) through hard-wired control, namely through a hard wire, and the vehicle management system (BMS) sends the instruction to the VMS; alternatively, the user may send the emergency command to the vehicle management system (BMS) through signal control, i.e., the CAN bus, and the vehicle management system (BMS) sends the command to the Vehicle Management System (VMS). After receiving the emergency instruction, the battery management system may increase the currently set battery operating range to the limit range.
It should be noted that, if the user sends the emergency command to the vehicle controller through the hard wire, the hard wire needs to be added in the electric vehicle to connect with the vehicle controller, and the emergency command is transmitted through the hard wire, so that the accuracy is high.
Optionally, according to the above embodiment of the present invention, in step S202, the receiving the input emergency instruction includes:
and step S232, generating an emergency instruction through hard wire control or signal control.
And step S234, sending the emergency instruction to the battery management system.
In an optional scheme, when a user checks that the displayed remaining power is lower than a preset value, if the user cannot charge the electric vehicle in time and needs to continue using the electric vehicle, the user can directly send an emergency instruction to a Battery Management System (BMS) through hard-wired control, namely through a hard wire; alternatively, the user may send the emergency command directly to a Battery Management System (BMS) through a signal control, i.e., a CAN bus. After receiving the emergency instruction, the battery management system may increase the currently set battery operating range to the limit range.
It should be noted here that if the user sends the emergency command to the battery management system through a hard wire, the electric vehicle needs to be additionally connected with the battery management system through a hard wire, and the emergency command is transmitted through hard wire control, so that the accuracy is high.
Optionally, according to the above embodiment of the present invention, after receiving the emergency instruction, the battery management system increases the currently set battery working range to the limit range according to the preset policy.
Specifically, the preset policy may be a software policy, and the currently set battery operating range may be expanded through the software policy.
In an alternative scheme, after receiving the emergency command, the Battery Management System (BMS) may increase the currently set battery operating range to a limit range through a software policy, for example, the currently set battery operating range is 0% to 100%, the limit range is-25% to 100%, and the Battery Management System (BMS) may allow the SOC to be allowable through the software policyBThe application range is-25% -100%.
Optionally, according to the above embodiment of the present invention, in the case that the remaining capacity of the electric vehicle battery is greater than or equal to the preset value, the method further includes:
in step S242, the battery management system obtains a normal use range of the electric vehicle battery.
Specifically, the normal use range may be an operating range of the actual SOC of the power battery, for example, the operating range of the actual SOC may be 20% to 100%.
And step S244, calculating to obtain the currently set battery working range by the battery management system according to the performance of the electric vehicle battery and the normal use range of the electric vehicle battery.
In an alternative scheme, when the electric vehicle is in normal operation, that is, the power battery is not fully used, the battery management system may calculate the available SOC based on the performance of the power battery and the range of the actual SOCBFor example, the actual SOC is in the range of 20% to 100%, and the available SOC can be obtained by calculationBThe range of (A) is 0% to 100%.
Optionally, according to the above embodiment of the present invention, if the remaining capacity of the electric vehicle battery is lower than the preset value, the electric vehicle battery stops working.
In an alternative scheme, when the electric vehicle normally works, namely the power battery is not fully usedWhen the remaining capacity of the battery of the electric vehicle is lower than a predetermined value, the electric vehicle cannot operate and needs to be charged, for example, when the SOC is lower than the predetermined valueBWhen the percentage is 0%, the electric vehicle cannot run and needs to be charged.
The above embodiments of the present invention will be described in detail below with reference to an application scenario in which the actual SOC operating range is 20% to 100%.
When the actual SOC is in the range of 20% to 100%, a Battery Management System (BMS) may calculate the SOC based on the performance of the power battery and the actual SOCB，SOCBThe range of (A) is-25% to 100%.
When the electric automobile normally works, the actual SOC working range is 20% -100%, and the SOC isBThe working range of (1) is 0% -100%, namely the display range of the residual electric quantity displayed to the user, when the SOC isBWhen the remaining capacity is 0%, the electric vehicle cannot operate and needs to be charged.
When the emergency state is in, the driver can send the emergency instruction to the vehicle management system (BMS) through hard wire control or signal control, the Vehicle Management System (VMS) sends the instruction to the Battery Management System (BMS), or the driver sends the emergency instruction to the Battery Management System (BMS) through hard wire control or signal control. After a Battery Management System (BMS) receives an emergency instruction, a software strategy allows the SOCBThe range of (A) is-25% to 100%, that is, the range of the actual SOC is 0% to 100%.
Through the scheme, the application that the power performance of the electric automobile and the service life of a battery system are good under the normal state can be ensured, and the release of the protected SOC in the emergency state can be ensured.
Example 3
According to an embodiment of the present invention, there is also provided a product embodiment of an electric vehicle including: the battery management system of any one of the above embodiments 1.
Optionally, the electric vehicle may further include a button for generating the emergency instruction in embodiment 1.
In an optional scheme, when a user checks that the displayed residual capacity is low and is lower than a preset value, if the user cannot charge the electric vehicle in time at the moment and needs to continue using the electric vehicle, the user can generate an emergency instruction through a trigger button, and after receiving the emergency instruction, the battery management system can increase the currently set working range of the battery to a limit range, so that the residual capacity of the power battery which cannot be used under normal conditions can be used, the working duration of the power battery is prolonged, and the user can continue using the electric vehicle.
According to the embodiment of the invention, under the condition that the residual electric quantity of the electric vehicle battery is lower than the preset value, the battery management system receives the input emergency instruction, and the currently set battery working range is increased to the limit range according to the emergency instruction so as to prolong the working time of the electric vehicle battery, so that the smaller battery working range is set under the normal condition, the service life of the electric vehicle battery is ensured, and under the emergency condition, the residual electric quantity protection of the electric vehicle battery can be used through the emergency instruction, the full-electric-quantity use of the electric vehicle battery is met, and the technical problem that the full-electric-quantity use of the electric vehicle battery in the prior art cannot be met on the basis of ensuring the service life of the battery is solved. Therefore, through the scheme provided by the embodiment of the invention, the effects that the battery of the electric vehicle can be fully used in an emergency, the working time of the battery of the electric vehicle is prolonged, and the user friendliness is improved can be achieved.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A battery management system, comprising:
the emergency control device comprises a receiving module, a judging module and a judging module, wherein the receiving module is used for receiving an input emergency instruction under the condition that the residual electric quantity of a battery of the electric vehicle is lower than a preset value, and the residual electric quantity is an electric quantity value determined based on the currently set working range of the battery;
the processing module is used for increasing the currently set battery working range to a limit range according to the emergency instruction so as to prolong the working time of the electric vehicle battery;
the battery management system is also used for receiving the emergency instruction through a hard wire or a CAN bus;
the battery management system further includes: the first acquisition module is used for acquiring the maximum use range of the electric vehicle battery, wherein the maximum use range is the use range of the full electric quantity of the power battery; and the first calculation module is used for calculating the limit range according to the performance of the electric vehicle battery and the maximum use range of the electric vehicle battery.
2. The battery management system of claim 1, wherein the battery management system is configured to receive the emergency command sent by a vehicle manager, and wherein the vehicle manager receives the emergency command through a hard wire or a CAN bus.
3. The battery management system of claim 1, further comprising:
the second acquisition module is used for acquiring the normal use range of the electric vehicle battery;
and the second calculation module is used for calculating to obtain the currently set battery working range according to the performance of the electric vehicle battery and the normal use range of the electric vehicle battery.
4. A method for processing the residual capacity of a battery of an electric vehicle is characterized by comprising the following steps:
the method comprises the steps that under the condition that the residual electric quantity of a battery of the electric vehicle is lower than a preset value, a battery management system receives an input emergency instruction, wherein the residual electric quantity is an electric quantity value determined based on a currently set battery working range;
the battery management system increases the currently set battery working range to a limit range according to the emergency instruction so as to prolong the working time of the electric vehicle battery;
wherein, the battery management system receives an input emergency instruction and comprises:
the battery management system receives the emergency instruction through a hard wire or a CAN bus;
before the battery management system increases the currently set battery working range to a limit range according to the emergency instruction, the method further includes: the battery management system acquires the maximum use range of the electric vehicle battery, wherein the maximum use range is the use range of the full electric quantity of the power battery; and the battery management system calculates the limit range according to the performance of the electric vehicle battery and the maximum use range of the electric vehicle battery.
5. The method of claim 4, wherein receiving the input emergency command by the battery management system comprises:
the vehicle control unit receives the emergency instruction through a hard line or a CAN bus;
and the vehicle control unit sends the received emergency instruction to the battery management system.
6. An electric vehicle, comprising: a battery management system as claimed in any one of claims 1 to 3.
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| CN201610861345.5A CN107487199B (en) | 2016-09-28 | 2016-09-28 | Battery management system and method for processing residual electric quantity of electric vehicle battery |
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| JP4281725B2 (en) * | 2005-09-01 | 2009-06-17 | トヨタ自動車株式会社 | Hybrid car |
| FR2975501B1 (en) * | 2011-05-20 | 2013-05-31 | Renault Sas | METHOD FOR ESTIMATING THE CHARGE STATE OF AN ELECTRIC BATTERY |
| JP5839045B2 (en) * | 2011-12-15 | 2016-01-06 | トヨタ自動車株式会社 | Hybrid car |
| JP6384412B2 (en) * | 2014-07-10 | 2018-09-05 | 株式会社デンソー | Power supply |
| CN104393355B (en) * | 2014-10-27 | 2016-08-24 | 潍柴动力股份有限公司 | The electric equilibrium control method of a kind of electrokinetic cell and device |
| CN105799536B (en) * | 2016-05-06 | 2018-11-02 | 重庆长安汽车股份有限公司 | A kind of power battery eliminates the control method and system of memory effect |
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