CN114261307B - Battery box identification method, device, equipment and storage medium - Google Patents

Battery box identification method, device, equipment and storage medium Download PDF

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Publication number
CN114261307B
CN114261307B CN202111676020.7A CN202111676020A CN114261307B CN 114261307 B CN114261307 B CN 114261307B CN 202111676020 A CN202111676020 A CN 202111676020A CN 114261307 B CN114261307 B CN 114261307B
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Prior art keywords
battery box
control device
vehicle control
pulse signal
battery
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CN114261307A (en
Inventor
马增
杨全凯
董继维
徐斌
叶华春
唐晓哲
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Chongqing Ruilan Automobile Research Institute Co ltd
Zhejiang Geely Holding Group Co Ltd
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Chongqing Ruilan Automobile Research Institute Co ltd
Zhejiang Geely Holding Group Co Ltd
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Publication of CN114261307A publication Critical patent/CN114261307A/en
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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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application provides a method, a device, equipment and a storage medium for identifying a battery box, wherein the method comprises the following steps: the vehicle control device sends a first pulse signal to the first battery box according to a first preset period, and the duty ratio of the first pulse signal is a first preset value; if the first battery box receives the first pulse signal within the first preset time period, the first battery box sets the number as a first number; the first battery box sends a second pulse signal to the vehicle control device according to a second preset period, and the duty ratio of the second pulse signal is a second preset value; if the vehicle control device receives the second pulse signal within the second preset time period and the second preset value is a value after the first preset value is attenuated according to the preset attenuation value, the vehicle control device identifies the first battery box according to the first number, and therefore the purpose that the vehicle accurately identifies the battery box is achieved.

Description

Battery box identification method, device, equipment and storage medium
Technical Field
The present disclosure relates to the field of vehicles, and in particular, to a method, an apparatus, a device, and a storage medium for identifying a battery box.
Background
With the development of electric vehicles, electric vehicles are becoming popular with consumers, and therefore, how to charge electric vehicles becomes an increasing concern for consumers. In order to facilitate charging of the electric automobile, most manufacturers can make the electric automobile into a battery-changing electric automobile, namely, the battery of the electric automobile can be detached and replaced, but because the battery of the electric automobile is large, the battery is complex in detachment, and therefore, the difficulty of a user is high when the first electric automobile is charged.
In the prior art, in order to facilitate a user to take and discharge a battery of an electric vehicle during charging, the battery of the electric vehicle is generally divided into a plurality of standardized battery boxes, and when the battery boxes are installed on the vehicle, the plurality of standardized battery boxes are combined in a certain mode, but after the plurality of standardized battery boxes are put into a charging bin for charging, the battery boxes cannot be accurately identified by the vehicle after being reinstalled on the vehicle.
Therefore, there is a problem in the prior art how to make the vehicle accurately recognize the battery box.
Disclosure of Invention
The embodiment of the application provides a method, a device, equipment and a storage medium for identifying a battery box, which are used for solving the problem of how to accurately identify the battery box for a vehicle in the prior art.
In a first aspect, an embodiment of the present application provides a method for identifying a battery box, where the method includes: the vehicle control device sends a first pulse signal to the first battery box according to a first preset period, and the duty ratio of the first pulse signal is a first preset value; if the first battery box receives the first pulse signal within the first preset time period, the first battery box sets the number as a first number; the first battery box sends a second pulse signal to the vehicle control device according to a second preset period, and the duty ratio of the second pulse signal is a second preset value; if the vehicle control device receives the second pulse signal within the second preset time period and the second preset value is a value after the first preset value decays according to the preset attenuation value, the vehicle control device identifies the first battery box according to the first number.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: by means of the communication between the vehicle control device and the battery boxes and the duty ratio of the pulse signals sent by the battery boxes, whether the communication between the vehicle control device and the battery boxes is faulty or not can be determined, so that when no fault occurs between the vehicle control device and the battery boxes, the vehicle control device can identify the battery boxes through the numbers arranged on the battery boxes, and therefore, even if the vehicle is after replacing the battery boxes, the vehicle can accurately identify a plurality of battery boxes through the numbers of each battery box, and therefore the purpose that the vehicle accurately identifies the battery boxes can be achieved.
In one possible embodiment, the vehicle further comprises a second battery compartment; accordingly, the first battery box transmits a second pulse signal to the vehicle control device according to a second preset period, including: the first battery box sends a third pulse signal to the second battery box according to a third preset period, and the duty ratio of the third pulse signal is a third preset value; correspondingly, the method further comprises the steps of: if the second battery box receives the third pulse signal within the third preset time period, the second battery box sets the number as a second number; the second battery box sends a second pulse signal to the vehicle control device according to a second preset period.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: the number of the battery boxes can be two or more, when the number of the battery boxes is multiple, the first battery box can send pulse signals to the second battery box, so that the second battery box can set the number to be the second number after receiving the pulse signals sent by the first battery box, and the vehicle control device can identify the second battery box.
In one possible embodiment, after the vehicle control apparatus identifies the first battery box by the first number, the method further includes: the vehicle control device identifies the second battery box by the second number.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: the second battery box can set the number to be the second number after receiving the pulse signal sent by the first battery box, so that the vehicle control device can identify the second battery box, and therefore, when the number of the battery boxes is multiple, the vehicle can still accurately identify each battery box, and the purpose that the vehicle accurately identifies multiple battery boxes is achieved.
In one possible embodiment, the method further comprises: if the first battery box does not receive the first pulse signal within a first preset time period, the first battery box sets the number as an unknown number; the first battery box sends a fourth pulse signal to the vehicle control device according to a second preset period, the duty ratio of the fourth pulse signal is a fourth preset value, and the fourth preset value is half of the first preset value; if the vehicle control device receives the fourth pulse signal within the fourth preset time period, the vehicle control device determines that the connection between the first battery box and the vehicle control device fails according to the first unknown number.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: if the first battery box does not receive the pulse signal sent by the vehicle control device, it is indicated that the connection between the first battery box and the vehicle control device fails, and in order that the first battery box can continue to send the pulse signal to the subsequent battery box, or in order that the first battery box can return the pulse signal to the vehicle control device, the first battery box needs to redefine the duty cycle of the sent pulse signal to define a value, so that the vehicle control device can determine the battery box with the specific failure according to the duty cycle of the finally received pulse signal, and the accuracy of detecting the failure is improved.
In one possible embodiment, the vehicle control device is connected in series with the first battery box, the first battery box is connected in series with the second battery box, the vehicle control device and the first battery box are communicated through a controller area network, and the vehicle control device and the second battery box are communicated through the controller area network.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: the vehicle control device, the first battery box and the second battery box are connected in series, so that the pulse signal finally received by the vehicle control device is the pulse signal sent by the last battery box, each battery box can be accurately identified, the problem that the vehicle control device is disordered in identification caused by the interaction of the pulse signal between each battery box and the vehicle control device is solved, the purpose of accurately identifying each battery box of the vehicle is achieved, and the vehicle control device can be respectively communicated with the first battery box and the second battery box, so that whether the first battery box and the second battery box are online or not can be rapidly determined by the vehicle control device.
In one possible embodiment, the method further comprises: the vehicle control device sends response instructions to the first battery box and the second battery box respectively; if the vehicle control device receives the feedback information of the first battery box and does not receive the feedback information of the second battery box, the vehicle control device determines that the second battery box has an offline fault; if the vehicle control device does not receive the feedback information of the first battery box and does not receive the feedback information of the second battery box, the vehicle control device determines that both the first battery box and the second battery box have offline faults.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: the vehicle control device can communicate with the first battery box and the second battery box respectively, and therefore, the vehicle control device can quickly determine whether the first battery box and the second battery box are on-line by sending response instructions to the first battery box and the second battery box.
In a second aspect, an embodiment of the present application provides an identification device for a battery box, including: the respective functional modules for implementing the identification method of the battery box of the first aspect, any functional module may be implemented by means of software and/or hardware.
For example, the apparatus may include a first transmitting module, a receiving module, a second transmitting module, and an identifying module.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: by means of the communication between the vehicle control device and the battery boxes and the duty ratio of the pulse signals sent by the battery boxes, whether the communication between the vehicle control device and the battery boxes is faulty or not can be determined, so that when no fault occurs between the vehicle control device and the battery boxes, the vehicle control device can identify the battery boxes through the numbers arranged on the battery boxes, and therefore, even if the vehicle is after replacing the battery boxes, the vehicle can accurately identify a plurality of battery boxes through the numbers of each battery box, and therefore the purpose that the vehicle accurately identifies the battery boxes can be achieved.
In a third aspect, an embodiment of the present application provides a terminal device, including: a processor, a memory, a display; the memory is used for storing programs and data, and the processor calls the programs stored in the memory to execute the identification method of the battery box in the first aspect.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: by means of the communication between the vehicle control device and the battery boxes and the duty ratio of the pulse signals sent by the battery boxes, whether the communication between the vehicle control device and the battery boxes is faulty or not can be determined, so that when no fault occurs between the vehicle control device and the battery boxes, the vehicle control device can identify the battery boxes through the numbers arranged on the battery boxes, and therefore, even if the vehicle is after replacing the battery boxes, the vehicle can accurately identify a plurality of battery boxes through the numbers of each battery box, and therefore the purpose that the vehicle accurately identifies the battery boxes can be achieved.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of identifying a battery box of the first aspect.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: by means of the communication between the vehicle control device and the battery boxes and the duty ratio of the pulse signals sent by the battery boxes, whether the communication between the vehicle control device and the battery boxes is faulty or not can be determined, so that when no fault occurs between the vehicle control device and the battery boxes, the vehicle control device can identify the battery boxes through the numbers arranged on the battery boxes, and therefore, even if the vehicle is after replacing the battery boxes, the vehicle can accurately identify a plurality of battery boxes through the numbers of each battery box, and therefore the purpose that the vehicle accurately identifies the battery boxes can be achieved.
In a fifth aspect, embodiments of the present application provide a computer program product comprising a computer program which, when executed by a processor, implements the method of identifying a battery compartment of the first aspect.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: by means of the communication between the vehicle control device and the battery boxes and the duty ratio of the pulse signals sent by the battery boxes, whether the communication between the vehicle control device and the battery boxes is faulty or not can be determined, so that when no fault occurs between the vehicle control device and the battery boxes, the vehicle control device can identify the battery boxes through the numbers arranged on the battery boxes, and therefore, even if the vehicle is after replacing the battery boxes, the vehicle can accurately identify a plurality of battery boxes through the numbers of each battery box, and therefore the purpose that the vehicle accurately identifies the battery boxes can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic view of an application scenario of a method for identifying a battery box according to an embodiment of the present application;
fig. 2 is a flowchart of a method for identifying a battery box according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a fault-determining battery box according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a power exchange station according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an identification device of a battery box according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments made by a person of ordinary skill in the art based on the embodiments in this application, in light of the teachings of this embodiment, are within the scope of this application.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise 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 prior art provided in the background art, when a vehicle identifies a battery box, at least the following technical problems exist:
with the development of electric vehicles, electric vehicles are increasingly popular with consumers, and consumers are most concerned about the problem of difficult charging of electric vehicles, in order to solve the problem, the battery of the electric vehicle can be designed as a battery replacement type, that is, the battery of the electric vehicle can be detached and then other batteries can be replaced, but because the weight of the battery is very heavy, and professional equipment operation is required for the whole detachment of the battery, the input cost is huge.
In order to solve the above-mentioned problems, one prior art method is to make the battery modularized and miniaturized, that is, to divide the battery into a plurality of battery boxes, each of which is adapted to be replaced by a hand of a user and charged. After the battery is modularized and miniaturized, a plurality of battery cases need to be combined in a certain manner and then mounted in a vehicle. In order to enable the operation to be flexible, the turnover rate of the battery box is improved, the battery of the electric automobile can be divided into a plurality of standardized battery boxes, but after the standardized battery boxes are installed in the vehicle, the vehicle cannot identify the battery boxes, so that the problem that the vehicle cannot identify the battery boxes still exists.
In order to solve the above-mentioned problems, another prior art method is to write the number (ID) of each battery box into the battery box in advance, but this method has limitations, for example, in order to avoid the same ID number from appearing in the same battery system, the box bodies of the battery boxes corresponding to a plurality of different ID numbers need to be manually bound together, thus resulting in low utilization rate of the battery boxes, and when the battery boxes are replaced, it is necessary to replace all the battery boxes in the whole vehicle as a whole, and the operation is also complicated; meanwhile, after a plurality of battery boxes are installed in a vehicle, the probability of the vehicle failure is increased, for example, due to loose connectors among the battery boxes, a certain battery box is separated from the vehicle, and once the battery boxes are separated from the vehicle, timely protection measures are not taken, so that serious safety accidents can be caused.
In view of the above, the present application proposes a method for identifying a battery box, wherein by means of communication between a vehicle control device and the battery box and a duty ratio of a pulse signal sent by the battery box, it is determined whether the communication between the vehicle control device and the battery box is faulty, so that when no fault occurs between the vehicle control device and the battery box, the vehicle control device can identify the battery box through a number set by the battery box, and thus, even if a vehicle is after replacing the battery box, a plurality of battery boxes can be accurately identified through the number of each battery box, and therefore, the purpose of accurately identifying the battery boxes by the vehicle can be achieved. The terms referred to in the present application are explained first below.
Duty cycle: the ratio of the time taken up by the pulses to the total time during a continuous operating time.
The method for identifying the battery boxes has the core ideas that the vehicle control device and the plurality of battery boxes are connected in series, and the ID can be distributed to the plurality of battery boxes through the receiving and transmitting of pulse signals, so that the vehicle can identify the battery boxes through the ID of each battery box; and the duty ratio of each transmitted pulse signal is preset, if the duty ratio of the pulse signal finally received by the vehicle control device deviates, the position where the fault occurs is easily positioned, so that the position where the fault occurs can be rapidly and accurately positioned through the duty ratio of the pulse signal, the fault occurs is warned, and the traffic accident of the vehicle is avoided.
In one embodiment, the method of identifying a battery box may be applied in an application scenario. Fig. 1 is a schematic diagram of an application scenario of the method for identifying battery boxes provided in the embodiment of the present application, as shown in fig. 1, in this scenario, taking 6 battery boxes as an example, connection relationships between a vehicle control device and the 6 battery boxes are sequentially connected in series, and the vehicle control device may be respectively connected with each battery box in a communication manner, and may also be connected with each battery box in a communication manner. The process of the vehicle control apparatus identifying these 6 battery boxes may be as follows:
the first stage, the vehicle control device sends PWM_ID_HVIL_out signal, the period is less than 1000ms (can be set according to the actual situation), the duty ratio of the PWM_ID_HVIL_out signal is 100%, the battery box which receives the PWM_ID_HVIL_out signal in the stipulated time sets the self ID as 1 (namely, the battery box 1); in the second stage, the battery box 1 sends a PWM1_out signal, the period is less than 1000ms (which can be set according to the actual situation), the duty ratio of the PWM1_out signal is 95%, and the battery box which receives the PWM1_out signal in a specified time sets the self ID to 2 (called as a battery box 2); the third stage, the battery box 2 sends a PWM2_out signal, the period is less than 1000ms (which can be set according to the actual situation), the duty ratio of the PWM2_out signal is 90%, and the battery box which receives the PWM2_out signal in a specified time sets the self ID to 3 (called as the battery box 3); a fourth stage, the battery box 3 sends a PWM3_out signal, the period is less than 1000ms (which can be set according to the actual situation), the duty ratio of the PWM3_out signal is 85%, and the battery box which receives the PWM3_out signal in a specified time sets the self ID to 4 (called as a battery box 4); a fifth step, the battery box 4 sends a PWM4_out signal, the period is less than 1000ms (which can be set according to the actual situation), the duty ratio of the PWM4_out signal is 80%, and the battery box which receives the PWM4_out signal in a specified time sets the self ID to 5 (called as a battery box 5); a sixth step, the battery box 5 sends a PWM5_out signal with a period less than 1000ms (which can be set according to the actual situation), the duty ratio of the PWM5_out signal is 75%, and the battery box which receives the PWM5_out signal in a specified time sets the self ID to 6 (called as a battery box 6); in the seventh stage, the battery box 6 transmits a pwm_id_hvil_in signal having a period of < 1000ms (which can be set according to actual conditions), the duty cycle of the pwm_id_hvil_in signal is 70%, and the vehicle control device receives the pwm_id_hvil_in signal within a prescribed time and determines that the duty cycle of the pwm_id_hvil_in signal coincides with the desired setting (70%). After the above seven stages are completed, the ID assignment of each battery box is completed, and it can be determined that the battery box has no offline fault. Therefore, the vehicle control device can accurately identify each battery box based on the ID of the corresponding battery box.
In the above scenario, PWM may be used to represent a pulse width modulated wave; pwm_id_hvil_out may be used to represent a PWM signal sent by the vehicle control device; the PWM1_out may be used to represent a PWM signal transmitted from the battery box 1; PWM2_out may be used to represent the PWM signal sent by battery box 2; PWM3_out may be used to represent the PWM signal sent by battery box 3; PWM4_out may be used to represent the PWM signal sent by battery box 4; PWM5_out may be used to represent the PWM signal sent by battery box 5; pwm_id_hvil_in may be used to represent a PWM signal sent by battery box 6 that is received by the vehicle control device.
In the above-described scenario, the identification process of the 6 battery boxes by the vehicle control apparatus is merely illustrated, and the principle of the identification of the battery boxes by the vehicle control apparatus is the same as that described above when there are other different numbers of battery boxes.
In combination with the above scenario, the following describes in detail the technical scheme of the method for identifying a battery box provided in the present application through several specific embodiments.
Fig. 2 is a flowchart of a method for identifying a battery box according to an embodiment of the present application, as shown in fig. 2, the method may include the following steps:
s201: the vehicle control device transmits a first pulse signal to the first battery box according to a first preset period.
In this step, the duty ratio of the first pulse signal (i.e., PWM signal) is a first preset value, and the first pulse signal transmitted by the vehicle control device is the first pulse signal transmitted in the process of entirely identifying the battery box, and therefore, the duty ratio of the first pulse signal may be set to be maximum, for example, the duty ratio of the first pulse signal is 100%. The first preset period may be a period in which the vehicle control apparatus transmits the first pulse signal, which is preset, for example, the first preset period may be 1000 milliseconds (ms), or the first preset period may be any one of times less than 1000ms, and thus the vehicle control apparatus may transmit the first pulse signal to the first battery box in accordance with the first preset period.
In the above aspect, the vehicle control device may be a vehicle control unit of a vehicle, or a main control unit of a battery management system of the vehicle. The first pulse signal transmitted from the vehicle control apparatus may be represented by pwm_id_hvil_out.
S202: if the first battery box receives the first pulse signal within the first preset time period, the first battery box sets the number as a first number.
In this step, the vehicle control device and the first battery box may be connected in series, so the vehicle controller may set the number of the first battery box to the first number, for example, the number of the first battery box is 1, and in this case, the first battery may be referred to as the battery box 1 if the first battery box may receive the first pulse signal within the first preset period of time, which indicates that there is no problem in connection between the vehicle control device and the first battery box.
S203: the first battery box sends a second pulse signal to the vehicle control device according to a second preset period.
In this step, the duty cycle of the second pulse signal is a second preset value. The first battery box may feed back to the vehicle control apparatus after setting its own number as the first number, and thus the first battery box may transmit the second pulse signal to the vehicle control apparatus in the second preset period.
In the above aspect, the second preset period may be a preset period of the first battery box transmitting the second pulse signal, for example, the second preset period may be 1000ms, or the second preset period may be any time less than 1000 ms. Since the second pulse signal is a pulse signal transmitted by the first battery box after receiving the first pulse signal, the duty cycle of the second pulse signal transmitted by the first battery box may be attenuated, for example, the duty cycle of the second pulse signal may be 95%.
In the above scheme, the second pulse signal transmitted by the first battery box may be represented by PWM 1_out.
In the above-described aspect, if there is more than one battery box, for example, there are two battery boxes connected in series between the first battery box and the second battery box, the first battery box will send a pulse signal to the second battery box after setting the number to 1, and the second battery box will send a pulse signal to the vehicle control device after receiving the pulse signal and setting the number value. Similarly, if more than two battery boxes are provided, pulse signals are sequentially sent back according to the serial connection sequence among the battery boxes, and the last battery box sends the pulse signals to the vehicle control device.
S204: if the vehicle control device receives the second pulse signal within the second preset time period and the second preset value is a value after the first preset value decays according to the preset attenuation value, the vehicle control device identifies the first battery box according to the first number.
In this step, the duty ratio of the second pulse signal transmitted from the first battery box to the vehicle control device needs to be a value after the first preset value is attenuated according to the preset attenuation value, that is, the first preset value is 100%, the preset attenuation value is 5%, the second preset value needs to be 95%, and only if the vehicle control device receives the second pulse signal in the second preset period, and determines that the duty ratio of the second pulse signal is 95%, the vehicle control device can confirm that no abnormality occurs in the first battery box, so the vehicle control device can identify the first battery box according to the first number of the first battery box.
In the above-described aspect, if the vehicle control device receives the second pulse signal within the second preset period of time, but the duty cycle of the second pulse signal is not 95%, for example, the duty cycle of the second pulse signal is 50%, the vehicle control device may determine that the first battery box is abnormal, and at this time, the vehicle control device may be sent the first pulse signal to fail, or a connection between the vehicle control device and the first battery box is failed, or the first battery box receives the first pulse signal to fail.
According to the battery box identification method provided by the embodiment, through the communication between the vehicle control device and the battery boxes and the duty ratio of the pulse signals sent by the battery boxes, whether the communication between the vehicle control device and the battery boxes is faulty or not can be determined, so that when no fault occurs between the vehicle control device and the battery boxes, the vehicle control device can identify the battery boxes through the numbers arranged on the battery boxes, and therefore, even after the vehicle replaces the battery boxes, the vehicle can accurately identify a plurality of battery boxes through the numbers of each battery box, and the purpose that the vehicle accurately identifies the battery boxes can be achieved.
The method for identifying the battery box is described in detail below.
In one embodiment, the vehicle further comprises a second battery compartment; accordingly, the first battery box transmits a second pulse signal to the vehicle control device according to a second preset period, including: the first battery box sends a third pulse signal to the second battery box according to a third preset period, and the duty ratio of the third pulse signal is a third preset value; correspondingly, the method further comprises the steps of: if the second battery box receives the third pulse signal within the third preset time period, the second battery box sets the number as a second number; the second battery box sends a second pulse signal to the vehicle control device according to a second preset period.
In this scheme, when the number of battery boxes is two, the first battery box needs to send the third pulse signal to the second battery box first, and when the second battery box receives the third pulse signal, the second battery box sends the second pulse signal to the vehicle control device again. Therefore, the first battery box needs to send the third pulse signal to the second battery box according to the third preset period, if the second battery box receives the third pulse signal in the third preset period, the second battery box can set the number of the second battery box to be the second number, for example, the number of the second battery box is 2, and at this time, the second battery box can be called as a battery box 2.
In the above solution, the third preset period may be a preset period in which the first battery box sends the third pulse signal to the second battery box, for example, the third preset period may be 1000ms, or the third preset period may be any time less than 1000 ms. Since the third pulse signal is a pulse signal transmitted from the first battery box, the third pulse signal may also be represented by PWM1_out, and the third pulse signal is a pulse signal transmitted from the first battery box to the second battery box after the first pulse signal is received, and thus the duty cycle of the third pulse signal may be a value after the first pulse signal is attenuated by a preset attenuation value, for example, 95%.
In the above scheme, if the second battery box does not receive the third pulse signal within the third preset time period, it is indicated that an abnormality occurs in connection between the second battery box and the first battery box, and the abnormality may be a problem in transmission of the first battery box, or in connection between the first battery box and the second battery box, or in reception of the third pulse signal by the second battery box. At this time, the duty ratio of the second pulse signal transmitted from the second battery box to the vehicle control device is a value reset by the second battery box, for example, 50%, instead of a value after the third pulse signal decays according to a preset decay value, for example, 90%. At this time, since the second pulse signal is a pulse signal transmitted from the second battery box, the second pulse signal at this time may be represented by PWM 2_out.
In the above scheme, when the number of the battery boxes is two or more, the vehicle can still accurately identify the corresponding battery box through the corresponding number of each battery box, so that the purpose that the vehicle accurately identifies a plurality of battery boxes is achieved.
In one embodiment, after the vehicle control apparatus identifies the first battery box by the first number, the method further includes: the vehicle control device identifies the second battery box by the second number.
In this scheme, the second battery box can set the number to the second number after receiving the third pulse signal that the first battery box sent to can make vehicle controlling means discern the second battery box, therefore when the quantity of battery boxes is a plurality of, the vehicle still can accurately discern corresponding battery box through the number that every battery box corresponds, thereby realizes the purpose that the vehicle accurately discerned a plurality of battery boxes.
In one embodiment, the method further comprises: if the first battery box does not receive the first pulse signal within a first preset time period, the first battery box sets the number as an unknown number; the first battery box sends a fourth pulse signal to the vehicle control device according to a second preset period, the duty ratio of the fourth pulse signal is a fourth preset value, and the fourth preset value is half of the first preset value; if the vehicle control device receives the fourth pulse signal within the fourth preset time period, the vehicle control device determines that the connection between the first battery box and the vehicle control device fails according to the first unknown number.
In this scheme, if the first battery box does not receive the first pulse signal sent by the vehicle control device in the first preset time period, the first battery box cannot accurately set its own number to a specific certain value, so, in order to facilitate sending of pulse signals to other subsequent battery boxes or sending of pulse signals to the vehicle control device, the first battery box may set its own number to an unknown number, for example, the number of the first battery box is X, at this time, the first battery box may be referred to as a battery box X, and if the subsequent battery box does not fail, the number of the subsequent battery box may be sequentially x+1, x+2, and so on. In this case, when the first battery box transmits the fourth pulse signal to the other battery box or the vehicle control device, the duty ratio of the fourth pulse signal transmitted by the first battery box needs to be redefined by the first battery box itself, for example, the duty ratio of the fourth pulse signal is 50%.
In the above aspect, after the vehicle control device finally receives the pulse signal, for example, in the case where there is only one first battery box, the vehicle control device receives the fourth pulse signal of the first battery box, and may determine whether the battery box has a fault, and specifically, the faulty battery box, according to the duty ratio of the finally received pulse signal.
In the above scheme, if an offline fault of the battery box, a broken wire fault of the wire harness, etc. occur, any battery box does not receive any valid PWM signal within a specified time, and then the battery box changes the PWM signal sent by itself: the period is less than 500ms (can be set according to actual conditions), the duty ratio of the transmitted PWM signal is changed to 50%, and the duty ratio of the PWM signal transmitted by the battery box can be sequentially decreased by 5% after the battery box subsequently receives the PWM signal transmitted by the battery box. The final vehicle control device can accurately judge which battery boxes are offline according to the duty ratio and the period of the received PWM_ID_HVIL_out signal.
For example, fig. 3 is a schematic diagram of a structure of a fault-determining battery box according to an embodiment of the present application, as shown in fig. 3, in a first stage, a vehicle control device sends a pwm_id_hvil_out signal with a period < 1000ms (which may be set according to practical situations), a duty cycle of the pwm_id_hvil_out signal is 100%, and a battery box that receives the pwm_id_hvil_out signal within a specified time sets its own ID to 1 (referred to as a battery box 1); in the second stage, the battery box 1 sends a PWM1_out signal, the period is less than 1000ms (which can be set according to the actual situation), the duty ratio of the PWM1_out signal is 95%, and the battery box which receives the PWM1_out signal in a specified time sets the self ID to 2 (called as a battery box 2); the third stage, the battery box 2 sends a PWM2_out signal, the period is less than 1000ms (can be set according to the actual situation), the duty ratio of the PWM2_out signal is 90%, when no battery box receives the PWM2_out signal within a specified time, the battery box which is not allocated with ID sets the ID of the battery box as X (namely, the battery box X); fourth stage, battery box X changes the duty cycle of its PWM signal to be transmitted, i.e., battery box X transmits pwmx_out signal, period: the duty ratio of the PWMx_out signal is 50%, and the battery box which receives the PWMx_out signal in a specified time sets the self ID to X+1 (called as battery box X+1); fifth stage, battery box x+1 sends pwmx+1_out signal, cycle: the duty ratio of the PWMx+1_out signal is 45%, and the battery box which receives the PWMx+1_out signal within a prescribed time period sets the self ID to X+2 (called as battery box X+2); sixth stage, battery box x+2 sends pwmx+2_out signal, cycle: the duty ratio of the PWMx+2_out signal is 40%, and the battery box which receives the PWMx+2_out signal within a prescribed time period sets the self ID to X+3 (called as battery box X+3); seventh stage, battery box x+3 sends pwm_id_hvil_in signal, cycle: < 500ms (which can be set according to practical situations), the duty ratio of the PWM_ID_HVIL_in signal is 35%, the vehicle control end receives the PWM_ID_HVIL_in signal within a specified time and determines the duty ratio of the PWM_ID_HVIL_in signal to be 35%.
After the seven stages are completed, the vehicle control device judges that the ID allocation of the battery box is unsuccessful, and the offline fault of the battery box exists, and initially obtains: battery box X to battery box x+3 are online (battery box 1 and battery box 2 may be offline), and the following calculation formula may be used to determine the last N online battery boxes:
n= ((50% -duty cycle of pwm_id_hvil_in signal received by vehicle control device) ×100/5) +1
After substituting the values according to the seven phases described above, n= ((50% -35%) 100/5) +1=4 is obtained, i.e. the last 4 battery boxes are on-line in the seven phases described above.
In the scheme, the vehicle control device can determine the specific fault battery box according to the duty ratio of the finally received pulse signal, so that the accuracy of fault detection is improved.
In the above scheme, the duty ratio of the PWM signal received and transmitted by the battery box during normal operation may be as shown in table 1 below:
table 1 duty cycle list for transmitting and receiving PWM signals when battery box is normal
In the above scheme, the duty ratio of the PWM signal transmitted and received when the battery box is abnormal may be as shown in table 2 below:
table 2 duty ratio list for transmitting and receiving PWM signals when a battery box is abnormal
In one embodiment, the vehicle control device is connected in series with the first battery box, the first battery box is connected in series with the second battery box, the vehicle control device is communicated with the first battery box through a controller area network, and the vehicle control device is communicated with the second battery box through the controller area network.
In the scheme, the vehicle control device, the first battery box and the second battery box are sequentially connected in series, so that a pulse signal finally received by the vehicle control device is a pulse signal sent by the last battery box (the next battery box is the second battery box), each battery box can be accurately identified, the problem that the vehicle control device is disordered due to the fact that the pulse signal is interacted between each battery box and the vehicle control device is avoided, the purpose that the vehicle accurately identifies each battery box is achieved, and the vehicle control device can be respectively communicated with the first battery box and the second battery box, and therefore whether the first battery box and the second battery box are online or not can be rapidly determined by the vehicle control device.
In the above scheme, the communication between the vehicle control device and the first battery box and the second battery box CAN be realized through wired interaction such as ethernet, carrier communication and the like, or CAN be realized through wireless interaction such as wireless network (WIFI), radio frequency and the like besides being realized through a controller area network (CAN communication network).
In one embodiment, the method further comprises: the vehicle control device sends response instructions to the first battery box and the second battery box respectively; if the vehicle control device receives the feedback information of the first battery box and does not receive the feedback information of the second battery box, the vehicle control device determines that the second battery box has an offline fault; if the vehicle control device does not receive the feedback information of the first battery box and does not receive the feedback information of the second battery box, the vehicle control device determines that both the first battery box and the second battery box have offline faults.
In this aspect, the vehicle control device may communicate with the first battery box and the second battery box, respectively, and therefore, the vehicle control device may quickly determine whether the first battery box and the second battery box are online by sending a response instruction to the first battery box and the second battery box.
In the above scheme, the vehicle control device may then send a response command through the CAN communication network, and ask the online battery box to report the online situation, and the vehicle control device determines whether the battery box is online or not through the response command as shown in table 3 below, taking the battery box 1 and the battery box 2 as examples:
table 3 on-line condition table for battery box
In one embodiment, if the battery box is directly used under the condition of unbalanced voltage of the battery box, the current circulation impact of the battery box can be caused, so that the power devices of the battery box are broken down and damaged, and therefore, if a plurality of battery boxes are needed to be used, the battery box can be used after the voltage is balanced.
In this scheme, a power exchange station may be provided, fig. 4 is a schematic structural diagram of the power exchange station provided in this application, as shown in fig. 4, where the power exchange station at least includes a power exchange station control device, a plurality of charging bins, and bidirectional chargers corresponding to the plurality of charging bins (indicated by bidirectional chargers 1, 2, …, and N in fig. 4), each charging bin may be correspondingly provided with a battery box (indicated by battery box 1, battery box 2, …, and N in fig. 4), signal interaction may be performed between the power exchange station and each bidirectional charger, energy interaction may be performed between each bidirectional charger, and energy interaction may also be performed between the bidirectional charger and the corresponding battery box. When the battery boxes are unloaded from the vehicle and put into the battery exchange station for charging, the battery boxes can be scattered and put into the charging bin of the battery exchange station, each battery box corresponds to one charging bin, all the charging bins are standard bins, no sequence is adopted, the battery exchange station control device detects and judges the voltage of the battery boxes in real time, if the voltage of the battery boxes is unbalanced, the battery exchange station control device can actively initiate a balance voltage command, and the bidirectional charger immediately executes balance voltage after receiving the balance voltage command of the battery exchange station control device, so that the voltage of the battery boxes is balanced. The balancing voltage strategy comprises discharging a high-voltage battery box, charging a low-voltage battery box and the like, so that the battery box can be balanced to an intermediate voltage quickly. Therefore, the problem that the battery box cannot be directly used when the voltage of the battery boxes is unbalanced can be avoided.
In the above scheme, the control device of the power exchange station may be a station control system of the power exchange station, or a centralized control system of the charger, etc. The signal interaction between the battery exchange station control device and the bidirectional charger CAN be wireless interaction, such as WIFI, radio frequency and the like, or CAN be wired interaction, such as Ethernet, CAN communication, carrier communication and the like.
According to the battery box identification method provided by the embodiment, through the communication between the vehicle control device and the battery boxes and the duty ratio of the pulse signals sent by the battery boxes, whether the communication between the vehicle control device and the battery boxes is faulty or not can be determined, so that when no fault occurs between the vehicle control device and the battery boxes, the vehicle control device can identify the battery boxes through the numbers arranged on the battery boxes, and therefore, even after the vehicle replaces the battery boxes, the vehicle can accurately identify a plurality of battery boxes through the numbers of each battery box, and the purpose that the vehicle accurately identifies the battery boxes can be achieved.
In general, the technical scheme provided by the application is a technical implementation method capable of improving the accuracy of the vehicle identification battery box and the accuracy of the vehicle identification fault.
Fig. 5 is a schematic structural diagram of an identification device for a battery box according to an embodiment of the present application, and as shown in fig. 5, an identification device 500 for a battery box includes:
a first transmitting module 501, configured to transmit a first pulse signal to a first battery box according to a first preset period, where a duty cycle of the first pulse signal is a first preset value;
the receiving module 502 is configured to set the number to a first number if the first battery box receives the first pulse signal within a first preset period of time;
a second sending module 503, configured to send a second pulse signal to the vehicle control device according to a second preset period by using the first battery box, where a duty cycle of the second pulse signal is a second preset value;
the identifying module 504 is configured to identify the first battery box according to the first number if the vehicle control device receives the second pulse signal within a second preset time period and the second preset value is a value after the first preset value decays according to the preset decay value.
Optionally, the second sending module 503 is further configured to send a third pulse signal to the second battery box according to a third preset period, where a duty cycle of the third pulse signal is a third preset value, and the device is correspondingly further configured to set the number to be a second number if the second battery box receives the third pulse signal within a third preset period of time; the second battery box sends a second pulse signal to the vehicle control device according to a second preset period.
Optionally, the device is further configured to identify the second battery box according to the second number after the vehicle control device identifies the first battery box according to the first number.
Optionally, the device is further configured to set the number to be an unknown number if the first battery box does not receive the first pulse signal within a first preset time period; the first battery box sends a fourth pulse signal to the vehicle control device according to a second preset period, the duty ratio of the fourth pulse signal is a fourth preset value, and the fourth preset value is half of the first preset value; if the vehicle control device receives the fourth pulse signal within the fourth preset time period, the vehicle control device determines that the connection between the first battery box and the vehicle control device fails according to the first unknown number.
Optionally, the vehicle control device is connected with the first battery box in series, the first battery box is connected with the second battery box in series, the vehicle control device is communicated with the first battery box through a controller area network, and the vehicle control device is communicated with the second battery box through the controller area network.
Optionally, the device is further used for the vehicle control device to send response instructions to the first battery box and the second battery box respectively; if the vehicle control device receives the feedback information of the first battery box and does not receive the feedback information of the second battery box, the vehicle control device determines that the second battery box has an offline fault; if the vehicle control device does not receive the feedback information of the first battery box and does not receive the feedback information of the second battery box, the vehicle control device determines that both the first battery box and the second battery box have offline faults.
The identification device for a battery box provided in this embodiment is configured to execute the technical scheme of the identification method for a battery box in the foregoing method embodiment, and its implementation principle and technical effect are similar, and are not described herein again.
Fig. 6 is a schematic structural diagram of a terminal device provided in an embodiment of the present application, where the terminal device 600 includes:
a processor 611, a memory 612, a display 613;
the memory 612 is used for storing programs and data, and the processor 611 calls the programs stored in the memory 612 to execute the technical scheme of the battery box identification method provided by the foregoing method embodiment.
In the above terminal device, the memory 612 and the processor 611 are electrically connected directly or indirectly to enable transmission or interaction of data. For example, the elements may be electrically connected to each other via one or more communication buses or signal lines, such as through a bus connection. The memory 612 stores computer-executable instructions for implementing the battery box identification method, including at least one software functional module that may be stored in the memory in the form of software or firmware, and the processor 611 executes the software programs and modules stored in the memory 612, thereby executing various functional applications and data processing.
The Memory may be, but is not limited to, random access Memory (Random Access Memory; RAM), read Only Memory (ROM), programmable Read Only Memory (Programmable Read-Only Memory; PROM), erasable Read Only Memory (Erasable Programmable Read-Only Memory; EPROM), electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory; EEPROM), etc. The memory is used for storing a program, and the processor executes the program after receiving the execution instruction. Further, the software programs and modules within the memory may also include an operating system, which may include various software components and/or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.
The processor may be an integrated circuit chip with signal processing capabilities. The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, abbreviated as CPU), a network processor (Network Processor, abbreviated as NP), and the like. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium comprises a program which is used for realizing the technical scheme of the battery box identification method provided in the method embodiment when being executed by a processor.
The present application also provides a computer program product comprising: and the computer program is used for realizing the technical scheme of the battery box identification method provided by the embodiment of the method when being executed by the processor.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (9)

1. A method of identifying a battery box, characterized by being applied to a vehicle including a vehicle control device and a first battery box, the method comprising:
the vehicle control device sends a first pulse signal to the first battery box according to a first preset period, and the duty ratio of the first pulse signal is a first preset value;
if the first battery box receives the first pulse signal within a first preset time period, the first battery box sets a number as a first number;
the first battery box sends a second pulse signal to the vehicle control device according to a second preset period, and the duty ratio of the second pulse signal is a second preset value;
if the vehicle control device receives the second pulse signal within a second preset time period and the second preset value is a value after the first preset value decays according to a preset decay value, the vehicle control device identifies the first battery box according to the first number;
further comprises:
if the first battery box does not receive the first pulse signal in the first preset time period, the first battery box sets the number as an unknown number;
The first battery box sends a fourth pulse signal to the vehicle control device according to the second preset period, wherein the duty ratio of the fourth pulse signal is a fourth preset value, and the fourth preset value is half of the first preset value;
and if the vehicle control device receives the fourth pulse signal within a fourth preset time period, the vehicle control device determines that the connection between the first battery box and the vehicle control device fails according to a first unknown number.
2. The method of claim 1, wherein the vehicle further comprises a second battery compartment;
correspondingly, the first battery box sends a second pulse signal to the vehicle control device according to a second preset period, and the method comprises the following steps:
the first battery box sends a third pulse signal to the second battery box according to a third preset period, and the duty ratio of the third pulse signal is a third preset value;
accordingly, the method further comprises:
if the second battery box receives the third pulse signal within a third preset time period, the second battery box sets the number as a second number;
and the second battery box sends the second pulse signal to the vehicle control device according to the second preset period.
3. The method according to claim 2, wherein after the vehicle control device identifies the first battery box by the first number, the method further comprises:
the vehicle control device identifies the second battery box according to the second number.
4. A method according to any one of claims 1 to 3, wherein the vehicle control device is connected in series with the first battery box, the first battery box is connected in series with the second battery box, the vehicle control device and the first battery box are in communication via a controller area network, and the vehicle control device and the second battery box are in communication via a controller area network.
5. The method according to claim 4, wherein the method further comprises:
the vehicle control device sends response instructions to the first battery box and the second battery box respectively;
if the vehicle control device receives the feedback information of the first battery box and does not receive the feedback information of the second battery box, the vehicle control device determines that the second battery box has an offline fault;
and if the vehicle control device does not receive the feedback information of the first battery box and does not receive the feedback information of the second battery box, the vehicle control device determines that the first battery box and the second battery box have offline faults.
6. An identification device for a battery box, comprising: a module for performing the identification method of a battery box according to any one of claims 1 to 5.
7. A terminal device, comprising:
a processor, a memory, a display;
the memory is used for storing programs and data, and the processor calls the programs stored in the memory to execute the identification method of the battery box according to any one of claims 1 to 5.
8. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method of identifying a battery compartment according to any one of claims 1 to 5.
9. A computer program product comprising a computer program for implementing the method of identifying a battery compartment according to any one of claims 1 to 5 when executed by a processor.
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