CN112498353B - Method, device, vehicle and medium for preventing abnormal movement of battery pack - Google Patents
Method, device, vehicle and medium for preventing abnormal movement of battery pack Download PDFInfo
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- CN112498353B CN112498353B CN202011374470.6A CN202011374470A CN112498353B CN 112498353 B CN112498353 B CN 112498353B CN 202011374470 A CN202011374470 A CN 202011374470A CN 112498353 B CN112498353 B CN 112498353B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/18—Braking system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2720/00—Output or target parameters relating to overall vehicle dynamics
- B60W2720/10—Longitudinal speed
Abstract
The invention discloses a method for preventing abnormal movement of a battery pack, which comprises the steps of acquiring the current state of a vehicle; when the current state is the running state, determining the state of a battery pack in the vehicle; if the state of the battery pack is a working state, acquiring and recording the change rate of vehicle parameters; judging whether the vehicle speed or the brake stroke of the vehicle is limited or not according to the vehicle parameter change rate and a preset parameter change threshold; and if so, limiting and controlling the speed or the brake stroke of the vehicle. The method, the device, the vehicle and the medium for preventing the battery pack from moving abnormally can monitor the vehicle speed acceleration, the throttle opening change rate and the brake opening change rate in real time in the vehicle running process, actively limit the overlarge opening degree to avoid the battery pack from tilting forwards or backwards, ensure the driving safety and have good intelligence.
Description
Technical Field
The present invention relates to the field of vehicle safety technologies, and in particular, to a method, an apparatus, a vehicle, and a medium for preventing abnormal movement of a battery pack.
Background
With the adjustment of transportation structures such as 'revolution iron', the demand of long-distance road transportation begins to decrease, but the demand of short-distance transportation is on the trend of increasing remarkably, and the short-distance transportation is the main place of new energy heavy trucks. Among them, in consideration of the problems of low operation efficiency, high acquisition cost, worry about battery performance, etc., the battery replacement type pure electric heavy truck capable of solving the above problems is being popularized more and more. However, the power battery pack used by the conventional power conversion type pure electric heavy truck is very heavy and high in installation position, and although the situation of rapid acceleration and rapid deceleration should be avoided in the driving process according to the use specification, the situation that each driver can execute the power battery pack according to the use specification cannot be guaranteed; when the vehicle is accelerated or decelerated suddenly, the power battery pack has the risk of leaning forward or leaning backward, and even if the device for fixing the power battery pack is provided with the locking mechanism, the risk caused by abnormal movement of the power battery pack cannot be eliminated, so that the safety of people and vehicles is greatly threatened. Therefore, a method, a device, a vehicle and a medium for preventing the battery pack from moving abnormally are needed, which can monitor the vehicle speed acceleration, the throttle opening change rate and the brake opening change rate in real time in the vehicle running process, actively limit the too large opening from the source, avoid the situations of rapid acceleration and rapid deceleration, avoid the battery pack from leaning forward or leaning backward, and ensure the driving safety.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a method, a device, a vehicle and a medium for preventing abnormal movement of a battery pack, which can monitor relevant parameters of the vehicle in real time during the running process of the vehicle, and actively limit an overlarge opening degree so as to avoid abnormal movement of the battery pack due to rapid acceleration or rapid deceleration and ensure the safety of people and vehicles during the driving process. The technical scheme is as follows:
in one aspect, the present invention provides a method for preventing abnormal movement of a battery pack, including
Acquiring the current state of the vehicle;
when the current state is the running state, determining the state of a battery pack in the vehicle;
if the state of the battery pack is a working state, acquiring and recording the change rate of vehicle parameters;
judging whether the vehicle speed or the brake stroke of the vehicle is limited or not according to the vehicle parameter change rate and a preset parameter change threshold;
and if so, limiting and controlling the speed or the brake stroke of the vehicle.
Further, the vehicle parameter change rate includes
The acceleration of the ascending vehicle speed and the change rate of the brake opening degree;
when the vehicle parameter change rate is the uplink vehicle speed acceleration, judging whether to limit the vehicle speed according to the uplink vehicle speed acceleration and a first calibration value;
and when the vehicle parameter change rate is the brake opening change rate, judging whether to limit the brake stroke according to the brake opening change rate and a third calibration value.
Further, the judging whether to limit the vehicle speed according to the uplink vehicle speed acceleration and a first calibration value comprises
Judging whether the uplink vehicle speed acceleration is greater than the first calibration value or not;
and if so, controlling the vehicle speed within the vehicle speed limit according to the uplink vehicle speed acceleration.
Further, the step of judging whether the acceleration of the uplink vehicle is greater than the first calibration value further comprises
If not, judging whether the throttle opening change rate is larger than a second calibration value or not;
and if the throttle opening degree change rate is larger than the second calibration value, controlling the throttle opening degree of the vehicle to be within the limited throttle opening degree according to the limited vehicle speed.
Further, the determining whether to limit the braking stroke according to the braking opening change rate and a third calibration value includes
Judging whether the brake opening change rate is greater than a third calibration value or not;
and if so, controlling the brake stroke to be within the limited brake stroke according to the limited downlink vehicle speed change rate.
Further, the current state being the running state comprises
If the vehicle speed is not equal to 0km/h, the current state is a running state; otherwise, the current state of the vehicle is a static state.
Further, the state of the battery pack as the working state comprises
Judging whether the SOC value of the battery pack is reduced or not; and if so, the state of the battery pack is a working state.
In another aspect, the present invention provides an apparatus for preventing abnormal movement of a battery pack, including
The state acquisition module is used for acquiring the current state of the vehicle;
the state determination module is used for determining the state of a battery pack in the vehicle when the current state is the running state;
the vehicle parameter change rate recording module is used for recording the vehicle parameter change rate when the state of the battery pack is a working state;
the judging module is used for judging whether to limit the vehicle speed or the brake stroke of the vehicle according to the vehicle parameter change rate and a preset parameter change threshold;
and the control module is used for limiting and controlling the speed or the brake stroke of the vehicle.
In another aspect, the present invention also provides a vehicle including the above-described apparatus for preventing abnormal movement of a battery pack.
In another aspect, the present invention also provides a medium having at least one instruction or at least one program stored therein, which is loaded and executed by a processor to implement the above-mentioned method for preventing abnormal movement of a battery pack.
The implementation of the invention has the following beneficial effects: the invention can actively limit the overlarge opening degree, the overhigh speed and the brake stroke by identifying the acceleration of the vehicle speed, the opening degree change rate of the throttle valve and the opening degree change rate of the brake, avoid the situations of rapid acceleration and rapid deceleration, further avoid the forward tilting or backward tilting of a battery pack in a heavy truck, ensure the driving safety and have high intelligent degree.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a logic structure diagram of a method for preventing abnormal movement of a battery pack according to an embodiment of the present invention;
fig. 2 is a logic structure diagram of another method for preventing abnormal movement of a battery pack according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method of determining the current state of the vehicle according to the present invention;
FIG. 4 is a flow chart of a method for determining the status of a battery pack according to the present invention;
fig. 5 is a schematic structural diagram of an apparatus for preventing abnormal movement of a battery pack according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments, and therefore, the present invention is not to be construed as being limited thereby. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the 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 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 can be practiced otherwise than as specifically illustrated or described below. 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 server 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.
The embodiment provides a method for preventing abnormal movement of a battery pack, which is applied to a device for preventing abnormal movement of a battery pack according to an embodiment of the present invention, and the device for preventing abnormal movement of a battery pack can be configured in a central controller of a vehicle, when the central controller receives that a current state of the vehicle is a running state in real time, the central controller continues to judge a state of the battery pack in the vehicle, and if the state of the battery pack is not a working state, the central controller does not perform recording of a vehicle parameter change rate and subsequent steps thereof; if the state of the battery pack is a working state, the central controller acquires and records the change rate of the vehicle parameters, judges through internal logic operation according to the recorded change rate of the vehicle parameters and a corresponding preset parameter change threshold value, and sends an instruction to limit and control the related vehicle speed or brake stroke if the recorded change rate of the vehicle parameters exceeds the corresponding preset parameter change threshold value so as to avoid sudden acceleration or sudden deceleration of the vehicle and harm to driving safety; if the judgment result is no, it is indicated that rapid acceleration or rapid deceleration does not occur in the real-time running process of the vehicle, and the battery pack does not have a tendency of forward tilting or backward tilting, so that the step of limiting and controlling the vehicle speed or the brake stroke of the vehicle is not required.
The following describes in detail the technical solution of the embodiment of the present invention, with reference to the accompanying fig. 1 of the specification, the method includes:
s101, acquiring the current state of the vehicle.
In one possible embodiment of the present invention, the current state of the vehicle may be directly monitored by using the sensing element, or the state of the engine of the vehicle or the variation signal of the switch controlling the start of the vehicle may be monitored, and the monitored signal is converted into an electric signal to be output, and a device and a signal, etc. capable of reflecting the current state of the vehicle may be used as the monitoring target in this step.
S103, when the current state is the running state, determining the state of a battery pack in the vehicle.
Wherein, the current state is a running state, which means that the vehicle is started and is in a state that the driver is driving and the vehicle is running; alternatively, in one possible embodiment, the current state, i.e., the running state, may be automatically controlled by a controller in the vehicle to enter an automatic driving mode, or may be manually driven by the driver to enable the vehicle to enter the running state.
In this embodiment, the state of the battery pack may be directly monitored by the sensor element, or a variation signal of the battery pack activation switch may be monitored and converted into a state signal of the battery pack via the controller, and any device or signal capable of reflecting the state of the battery pack may be the target of monitoring in this step.
And S105, if the state of the battery pack is the working state, acquiring and recording the change rate of the vehicle parameters.
The battery pack is in a working state, namely in a state that the current state of the vehicle is an operation state, the battery pack provides power for the operation of the vehicle, and in the state, the electric quantity stored in the battery pack is reduced, and the electric energy is converted into kinetic energy to drive the vehicle to run; when the state of the battery pack is not the working state, the vehicle depends on other power when running, and the battery pack does not supply power to the vehicle, so that the subsequent steps can not be executed; the vehicle parameter change rate may be a change rate of any parameter associated with rapid acceleration or rapid deceleration of the vehicle, and the present invention is not particularly limited thereto.
And S107, judging whether to limit the speed or the brake stroke of the vehicle according to the vehicle parameter change rate and a preset parameter change threshold.
In addition, in this embodiment, the preset parameter change threshold may be a recorded value of the battery pack that is recorded last by the controller when the battery pack has a forward or backward tendency, or may be a calculated value that is calculated and determined according to a simulation analysis method; meanwhile, the preset parameter change threshold may also be set according to actual conditions, and may be a specific numerical value or a numerical range, which is not specifically limited in the present invention.
In a possible embodiment of the present invention, the controller determines, according to the recorded data, whether the currently recorded vehicle parameter change rate is greater than a corresponding preset parameter change threshold, and if the vehicle parameter change rate is greater than the corresponding preset parameter change threshold, it may be considered that a vehicle speed of the vehicle is about to have a tendency of rapid acceleration or rapid deceleration, a battery pack loaded on the vehicle may have a tendency of abnormal movement under an inertia effect, and at this time, to avoid that the battery pack abnormally moves and endangers driving safety, step S109 may be performed.
And S109, if the judgment result is yes, limiting and controlling the vehicle speed or the brake stroke of the vehicle.
Specifically, as shown in fig. 2 in the specification, the vehicle parameter change rate includes an uplink vehicle speed acceleration, and at this time, a preset parameter change threshold corresponding to the uplink vehicle speed acceleration is a first calibration value; and when the vehicle parameter change rate is the uplink vehicle speed acceleration, judging whether to limit the vehicle speed according to the uplink vehicle speed acceleration and a first calibration value.
Preferably, in one possible embodiment, the determining whether to limit the vehicle speed based on the uplink vehicle speed acceleration and a first calibration value comprises
S202, judging whether the acceleration of the uplink vehicle speed is greater than the first calibration value;
and S204, if so, controlling the vehicle speed within the vehicle speed limit according to the uplink vehicle speed acceleration.
The uplink vehicle speed acceleration can be obtained through real-time monitoring of sensing elements such as an acceleration sensor and the like, the uplink vehicle speed acceleration information is transmitted to the controller, a set first calibration value is stored in the controller in advance, the first calibration value is a critical value or a critical range of the uplink vehicle speed acceleration corresponding to the situation that the battery pack tends to tilt forward, the first calibration value is also the uplink vehicle speed acceleration, and the international unit is m/s2(ii) a Performing logic judgment in the controller, if the real-time uplink vehicle speed acceleration is greater than a first calibration value, executing S204, performing logic operation in the controller according to the real-time uplink vehicle speed acceleration, sending a related instruction, and controlling the vehicle speed of the vehicle within a vehicle speed limit; the vehicle speed limit here means to allowThe maximum speed of the battery pack which is allowed not to move abnormally is corresponding to the real-time acceleration of the uplink vehicle speed, the maximum speed of the battery pack which is allowed not to move abnormally is calculated and set in advance through simulation analysis and then is stored in the controller, and the corresponding speed limit of the battery pack can be adjusted at any time by the controller according to the real-time acceleration of the uplink vehicle speed so as to ensure that the vehicle cannot be accelerated suddenly, further avoid the forward inclination of the battery pack caused by the over-high speed of the vehicle when the vehicle runs on a long slope, and be beneficial to driving safety.
Preferably, as shown in fig. 2 of the specification, in a possible implementation of the specification, the determining whether the uplink vehicle speed acceleration is greater than the first calibration value in step S202 further includes
S206, if not, judging whether the throttle opening change rate is larger than a second calibration value or not;
and S208, if the throttle opening degree change rate is larger than the second calibration value, controlling the throttle opening degree of the vehicle to be within a limited throttle opening degree according to the limited vehicle speed.
When the controller judges that the acceleration of the uplink vehicle speed is not greater than a first calibration value, in order to more systematically and comprehensively avoid the forward tilting trend of the battery pack, on the basis, a monitoring element monitors and acquires the throttle opening change rate related to acceleration, and transmits the information to the controller; the second calibration value is a critical value or critical range of a throttle opening degree change rate corresponding to the forward tilting trend of the battery pack, belongs to one of preset parameter change threshold values, can be stored in the controller after being preset, and then is subjected to logic judgment by the interior of the controller, if the real-time throttle opening degree change rate is recorded to be larger than the second calibration value, the step S208 can be executed, logic operation is carried out in the controller according to the highest vehicle speed allowed by vehicle operation, relevant instructions are sent, the throttle opening degree of the vehicle is controlled within the limited throttle opening degree, and the rapid acceleration trend of the vehicle is prevented from being enhanced due to the fact that the throttle opening degree is too large; if the conditions that the acceleration of the ascending vehicle is not greater than the first calibration value and the change rate of the throttle opening is not greater than the second calibration value are simultaneously met, the situation that the vehicle does not tend to accelerate suddenly in the running state can be determined, and the step of limiting and controlling the vehicle speed or the throttle opening is not needed.
It should be noted that in one possible embodiment of the present description, the maximum vehicle speed that can be allowed for the vehicle operation may be the above-described vehicle speed limit; the limited throttle opening degree is the maximum throttle opening degree which can allow the battery pack not to move abnormally, corresponds to the maximum vehicle speed which can be allowed by the vehicle to operate, can be calculated and set in advance through simulation analysis and then stored in the controller, and can be adjusted at any time by the controller according to the maximum vehicle speed which can be allowed by the vehicle to operate, so that the condition that the vehicle does not accelerate suddenly is ensured, the forward tilting of the battery pack caused by the sudden acceleration is avoided, and the driving safety is facilitated.
Specifically, as shown in fig. 2 in the description, the vehicle parameter change rate further includes a brake opening change rate, and at this time, a preset parameter change threshold corresponding to the brake opening change rate is a third calibration value; and when the vehicle parameter change rate is the brake opening change rate, judging whether to limit the brake stroke according to the brake opening change rate and a third calibration value.
Preferably, in one possible embodiment, the determining whether to limit the braking stroke according to the braking opening change rate and a third calibration value includes
S210, judging whether the brake opening change rate is greater than a third calibration value or not;
and S212, if so, controlling the brake stroke within the limited brake stroke according to the limited downlink vehicle speed change rate.
The controller is pre-stored with a set third calibration value, the third calibration value is a critical value or critical range of the brake opening change rate corresponding to the situation that the battery pack has a backward inclination trend, the brake opening change rate and the third calibration value are logically judged through the controller, if the real-time brake opening change rate is recorded to be larger than the third calibration value, the step S212 can be executed, logical operation is carried out in the controller according to the limitation of the down-going vehicle speed change rate, and a related instruction is sent to control the brake stroke of the vehicle within the limitation of the brake stroke; in a possible embodiment of the present disclosure, the limited down vehicle speed acceleration may be a critical value or a critical range of the down vehicle speed acceleration corresponding to the situation that the battery pack is allowed not to have a tendency to lean backward, and the down vehicle speed acceleration may be numerically equal to the above up vehicle speed acceleration, but in an opposite direction, so as to ensure that rapid deceleration does not occur during vehicle deceleration; the limited braking travel corresponds to the limited descending speed change rate, can be calculated and set in advance through simulation analysis and then stored in the controller, and can also be adjusted at any time according to different limited descending speed change rates by the controller so as to ensure that the vehicle does not have the condition of rapid deceleration, so that the battery pack is tilted backwards, and the driving safety is facilitated.
Specifically, the current state is an operating state including
S301, if the vehicle speed is not equal to 0km/h, the current state is a running state; otherwise, the current state of the vehicle is a static state.
It is understood that a judging step S301 is further included between the step S101 and the step S103; as shown in fig. 3 in the specification, in a possible embodiment of the specification, the current state of the vehicle may include a vehicle speed, the current state of the vehicle may be obtained by monitoring a change of the vehicle speed in real time by using a vehicle speed sensor and transmitting information of the vehicle speed to a controller, the controller receives the real-time vehicle speed information to perform a logic determination, and if the determination result is that the real-time vehicle speed is equal to 0, the current state of the vehicle is a stationary state, that is, the vehicle does not run, that is, there is no case of rapid acceleration or rapid deceleration, and then the step S103 and a series of subsequent steps are not required to be performed; if the real-time vehicle speed is not equal to 0 as a judgment result of the controller, the current state of the vehicle is a running state, and then S103 is executed to further determine the state of a battery pack in the vehicle; the operation states include an acceleration operation state, a deceleration operation state and a constant speed operation state, wherein the acceleration operation state and the deceleration operation state particularly need attention so as to avoid the trend of abnormal movement of the battery pack.
Specifically, in another possible embodiment, referring to fig. 4 of the specification, the state of the battery pack as the working state includes
S402, judging whether the SOC value of the battery pack is reduced or not; and if so, the state of the battery pack is a working state.
It is understood that a judging step S402 is further included between the step S103 and the step S105; the SOC is called State of Charge, and is a State of the battery pack, which is also called a remaining battery capacity, the SOC value represents a ratio of a remaining dischargeable battery capacity after the battery is used for a period of time or left unused for a long time to a battery capacity in a fully charged State thereof, and a common percentage represents that the SOC value is decreased and represents that the battery capacity in the battery pack is being consumed.
Installing an SOC monitoring element on a battery pack, starting the SOC monitoring element and transmitting real-time information of SOC to a controller when the current state of the vehicle is determined to be a running state, receiving and storing the real-time information of the SOC of the current time by the controller, carrying out logic operation and judgment in the controller, judging that the state of the battery pack is a working state if the received SOC value of the current time is smaller than the received and stored SOC value of the last time, and further executing the step S105 and a series of subsequent steps; meanwhile, the received real-time SOC information is stored for comparison with the next received real-time SOC information, and whether the state of the battery pack is a working state or not is continuously judged; and if the SOC value received this time is not less than the SOC value received and stored last time, the state of the battery pack is judged to be a dormant state, namely the battery pack is not in a working state, and other power sources can provide power for the running of the vehicle at the moment.
According to the embodiment of the method for preventing the battery pack from abnormally moving provided by the invention, the method for preventing the battery pack from abnormally moving can actively limit the overlarge opening degree, the overhigh speed and the brake stroke by identifying the vehicle speed acceleration, the throttle opening degree change rate and the brake opening degree change rate, avoid the situations of rapid acceleration and rapid deceleration, further avoid the battery pack in the heavy truck from tilting forward or backward, ensure the driving safety and have high intelligent degree.
In correspondence with the method for preventing the abnormal movement of the battery pack provided by the present embodiment, embodiments of the present invention also provide an apparatus for preventing the abnormal movement of the battery pack, and since the apparatus for preventing the abnormal movement of the battery pack provided by the embodiments of the present invention corresponds to the methods for preventing the abnormal movement of the battery pack provided by the above-mentioned several embodiments, the embodiments of the method for preventing the abnormal movement of the battery pack described above are also applicable to the apparatus for preventing the abnormal movement of the battery pack provided by the present embodiment, and will not be described in detail in the present embodiment.
The device for preventing the abnormal movement of the battery pack provided by the embodiment of the invention can realize the method for preventing the abnormal movement of the battery pack in the embodiment of the method, and the device can comprise
A state obtaining module 510 for obtaining a current state of the vehicle;
a state determination module 520, configured to determine a state of a battery pack in the vehicle when the current state is an operating state;
a vehicle parameter change rate recording module 530, configured to record a vehicle parameter change rate when the state of the battery pack is a working state;
the judging module 540 is configured to judge whether to limit the vehicle speed or the brake travel of the vehicle according to the vehicle parameter change rate and a preset parameter change threshold;
and the control module 550 is used for limiting and controlling the speed or the brake stroke of the vehicle.
In a possible implementation, the determining module 540 may further include:
the first judgment module is used for judging whether the uplink vehicle speed acceleration is greater than the first calibration value or not;
and if so, controlling the vehicle speed within the vehicle speed limit according to the uplink vehicle speed acceleration.
In a possible implementation, the determining module 540 may further include:
the second judging module is used for judging whether the throttle opening degree change rate is larger than a second calibration value or not when the ascending vehicle speed acceleration is not larger than the first calibration value;
and if the throttle opening degree change rate is larger than the second calibration value, controlling the throttle opening degree of the vehicle to be within the limited throttle opening degree according to the limited vehicle speed.
In a possible implementation, the determining module 540 may further include:
the third judgment module is used for judging whether the brake opening change rate is greater than the third calibration value or not;
and if so, controlling the brake stroke to be within the limited brake stroke according to the limited downlink vehicle speed change rate.
It should be noted that, when the apparatus provided in the foregoing embodiment implements the functions thereof, only the division of the functional modules is illustrated, and in practical applications, the functions may be distributed by different functional modules according to needs, that is, the internal structure of the apparatus may be divided into different functional modules to implement all or part of the functions described above. In addition, the apparatus and method embodiments provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments for details, which are not described herein again.
The device for preventing the abnormal movement of the battery pack judges whether the current state of the vehicle is the running state or not by acquiring the current information of the vehicle, determines the state of the battery pack in the vehicle when the current state is the running state, further acquires and records the change rate of vehicle parameters when the state of the battery pack is the working state, then judges whether to limit the vehicle speed or the brake stroke of the vehicle according to the change rate of the vehicle parameters and a preset parameter change threshold value, and further limits and controls the vehicle speed or the brake stroke of the vehicle when the judgment result is yes. By monitoring vehicle parameters related to vehicle acceleration and deceleration such as vehicle speed acceleration, throttle opening change rate and brake opening change rate in real time, the vehicle speed control system actively limits overlarge opening, overhigh vehicle speed and brake stroke, avoids the situations of rapid acceleration and rapid deceleration, further avoids the situation that a battery pack in a heavy truck leans forward or leans backward, actively ensures driving safety to the maximum extent, and has high intelligent degree.
An embodiment of the present invention further provides a vehicle, including a controller and the above-mentioned device for preventing abnormal movement of a battery pack, where the device for preventing abnormal movement of a battery pack is controlled by the controller, the controller includes a processor and a memory, and the memory stores at least one instruction or at least one program, and the at least one instruction or the at least one program is loaded and executed by the processor to implement the above-mentioned method for preventing abnormal movement of a battery pack.
The processor (or CPU) is a core component of the device for preventing the battery pack from moving abnormally, and mainly has functions of interpreting memory instructions and Processing data fed back by each monitoring module or acquisition module; the processor is generally divided into an arithmetic logic unit and a register unit, wherein the arithmetic logic unit mainly performs related logic calculations (such as shift operations, logic operations, fixed-point or floating-point arithmetic operations, address operations, etc.), and the register unit is used for temporarily storing instructions, data, and addresses.
The memory is a memory device and can be used for storing software programs and modules, and the processor executes various functional applications and data processing by running the software programs and modules stored in the memory. The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs needed by functions and the like; the storage data area may store data created according to use of the device, and the like; accordingly, the memory may also include a memory controller to provide the processor access to the memory.
The embodiment of the present invention further provides a medium, where at least one instruction or at least one program is stored, where the at least one instruction or the at least one program is loaded and executed by a processor to implement the above method for preventing abnormal movement of a battery pack; alternatively, the medium may reside on at least one of a plurality of network servers of a computer network; in addition, the medium may include, but is not limited to, various media that may store program codes, such as a Random Access Memory (RAM), a Read-Only Memory (ROM), a usb disk, a removable hard disk, a magnetic disk storage device, a flash Memory device, other volatile solid state storage devices, and the like.
It should be noted that the order of the above embodiments of the present invention is only for description, and does not represent the merits of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
While the invention has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made, and equivalents may be substituted for elements thereof without departing from the scope of the invention as defined by the claims.
Claims (10)
1. A method for preventing abnormal movement of a battery pack, comprising
Acquiring the current state of the vehicle;
when the current state is the running state, determining the state of a battery pack in the vehicle; the current state is a running state that the vehicle is started and is in a state that a driver drives and the vehicle runs;
if the state of the battery pack is a working state, acquiring and recording the change rate of vehicle parameters;
judging whether the vehicle speed or the brake stroke of the vehicle is limited or not according to the vehicle parameter change rate and a preset parameter change threshold;
and if so, limiting and controlling the speed or the brake stroke of the vehicle.
2. The method of claim 1, wherein the vehicle parameter change rate comprises
The acceleration of the ascending vehicle speed and the change rate of the brake opening degree;
when the vehicle parameter change rate is the uplink vehicle speed acceleration, judging whether to limit the vehicle speed according to the uplink vehicle speed acceleration and a first calibration value;
and when the vehicle parameter change rate is the brake opening change rate, judging whether to limit the brake stroke according to the brake opening change rate and a third calibration value.
3. The method of claim 2, wherein said determining whether to limit said vehicle speed based on said upstream vehicle speed acceleration and a first calibration value comprises
Judging whether the uplink vehicle speed acceleration is greater than the first calibration value or not;
and if so, controlling the vehicle speed within the vehicle speed limit according to the uplink vehicle speed acceleration.
4. The method of claim 3, wherein said determining whether said upstream vehicle speed acceleration is greater than said first calibrated value further comprises
If not, judging whether the throttle opening change rate is larger than a second calibration value or not;
and if the throttle opening degree change rate is larger than the second calibration value, controlling the throttle opening degree of the vehicle to be within the limited throttle opening degree according to the limited vehicle speed.
5. The method as claimed in claim 2, wherein the determining whether to limit the braking stroke according to the braking opening change rate and a third calibration value comprises
Judging whether the brake opening change rate is greater than a third calibration value or not;
and if so, controlling the brake stroke to be within the limited brake stroke according to the limited downlink vehicle speed change rate.
6. The method as claimed in claim 1, wherein the current state being the operation state includes
If the vehicle speed is not equal to 0km/h, the current state is a running state; otherwise, the current state of the vehicle is a static state.
7. The method as claimed in claim 1, wherein the state of the battery pack being the operation state includes
Judging whether the SOC value of the battery pack is reduced or not; and if so, the state of the battery pack is a working state.
8. An apparatus for preventing abnormal movement of a battery pack, comprising
The state acquisition module is used for acquiring the current state of the vehicle;
the state determination module is used for determining the state of a battery pack in the vehicle when the current state is the running state; the current state is a running state that the vehicle is started and is in a state that a driver drives and the vehicle runs;
the vehicle parameter change rate recording module is used for recording the vehicle parameter change rate when the state of the battery pack is a working state;
the judging module is used for judging whether to limit the vehicle speed or the brake stroke of the vehicle according to the vehicle parameter change rate and a preset parameter change threshold;
and the control module is used for limiting and controlling the speed or the brake stroke of the vehicle.
9. A vehicle characterized by comprising the apparatus for preventing abnormal movement of a battery pack according to claim 8.
10. A medium having at least one instruction or at least one program stored therein, the at least one instruction or the at least one program being loaded and executed by a processor to implement the method for preventing abnormal movement of a battery pack according to any one of claims 1 to 7.
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