CN114261307A - 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
CN114261307A
CN114261307A CN202111676020.7A CN202111676020A CN114261307A CN 114261307 A CN114261307 A CN 114261307A CN 202111676020 A CN202111676020 A CN 202111676020A CN 114261307 A CN114261307 A CN 114261307A
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battery box
control device
vehicle control
pulse signal
battery
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CN202111676020.7A
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CN114261307B (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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Zhejiang Geely Holding Group Co Ltd
Zhejiang Jizhi New Energy Automobile Technology 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 battery box identification method, a battery box identification device and a storage medium, 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, wherein 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 the serial number as a first serial 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 in the second preset time period and the second preset value is a value obtained 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 increasingly popular with consumers, and therefore, how to charge electric vehicles becomes an increasing concern for consumers. In order to conveniently charge the electric automobile, most manufacturers can make the electric automobile into a battery-replaceable electric automobile, that is, the battery of the electric automobile can be disassembled and replaced, but the battery of the electric automobile is large and is complex when being disassembled, so that the difficulty is high when the user charges the second electric automobile.
In the prior art, in order to conveniently take and place the battery of the electric automobile when a user charges the battery, the battery of the electric automobile is generally divided into a plurality of standardized battery boxes, and when the battery box is installed on a vehicle, the plurality of standardized battery boxes are combined in a certain mode.
Therefore, the prior art has a problem of how to accurately identify the battery box for the vehicle.
Disclosure of Invention
The embodiment of the application provides a battery box identification method, a battery box identification device, equipment and a storage medium, and is used for solving the problem of how to accurately identify a battery box by 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, wherein 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 the serial number as a first serial 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; and if the vehicle control device receives the second pulse signal in a second preset time period and the second preset value is a value obtained 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.
The technical scheme provided by the embodiment of the application can have the following beneficial effects: through the communication between the vehicle control device and the battery box and the duty ratio of the pulse signal sent by the battery box, whether the communication between the vehicle control device and the battery box has a fault can be determined, so that when the communication between the vehicle control device and the battery box has no fault, the vehicle control device can identify the battery box through the serial number set by the battery box, and therefore, even if the vehicle replaces the battery box, a plurality of battery boxes can be accurately identified through the serial number of each battery box, and the purpose that the vehicle accurately identifies the battery boxes can be achieved.
In one possible embodiment, the vehicle further includes a second battery box; correspondingly, the first battery box sends a second pulse signal to the vehicle control device according to a second preset period, and the second pulse signal comprises: 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: if the second battery box receives a third pulse signal within a third preset time period, the second battery box sets the serial number as a second serial number; and 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 have the following beneficial effects: the quantity of battery box can be two or other more, when the quantity of battery box is a plurality of, first battery box can send pulse signal to the second battery box, so that the second battery box can set up the serial number into the second serial number after receiving the pulse signal that first battery box sent, thereby can make vehicle control device discern the second battery box, consequently, when the quantity of battery box is a plurality of, every battery box still can accurately be discerned to the vehicle, thereby realize the purpose that the vehicle accurately discerned a plurality of battery boxes.
In one possible embodiment, after the vehicle control device identifies the first battery box by the first number, the method further includes: the vehicle control device identifies the second battery box according to the second number.
The technical scheme provided by the embodiment of the application can have the following beneficial effects: the second battery box can set the serial number as the second serial number after receiving the pulse signal that first battery box sent to can make vehicle control device discern the second battery box, consequently, when the quantity of battery box was a plurality of, every battery box still can accurately be discerned to the vehicle, thereby realizes the purpose that the vehicle accurately discerned a plurality of battery boxes.
In one possible embodiment, the method further comprises: if the first battery box does not receive the first pulse signal within the first preset time period, the first battery box sets the serial number as an unknown serial 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 is failed according to the first unknown number.
The technical scheme provided by the embodiment of the application can have 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 is faulty, and in order that the first battery box can continue to send the pulse signal to the subsequent battery boxes or the first battery box can return the pulse signal to the vehicle control device, the first battery box needs to redefine the duty ratio of the sent pulse signal, so that the vehicle control device can determine the specific faulty battery box according to the duty ratio of the finally received pulse signal, and therefore, the accuracy of fault detection 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 communicates with the first battery box via a controller area network, and the vehicle control device communicates with the second battery box via the controller area network.
The technical scheme provided by the embodiment of the application can have the following beneficial effects: the vehicle control device and the first battery box and the second battery box are connected in series, so that the finally received pulse signal of 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 identification of the vehicle control device is disordered due to the fact that the pulse signals are interacted between each battery box and the vehicle control device is solved, the purpose that the vehicle accurately identifies each battery box is achieved, the vehicle control device can be respectively communicated with the first battery box and the second battery box, and the vehicle control device can quickly determine whether the first battery box and the second battery box are on line or not.
In one possible embodiment, the method further comprises: the vehicle control device respectively sends response instructions to the first battery box and the second battery box; 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 the first battery box and the second battery box have offline faults.
The technical scheme provided by the embodiment of the application can have the following beneficial effects: the vehicle control apparatus may communicate with the first battery box and the second battery box, respectively, and thus, the vehicle control apparatus may quickly determine whether the first battery box and the second battery box are online by transmitting 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 apparatus for a battery box, including: any functional module of the functional modules for implementing the battery box identification method of the first aspect may be implemented by software and/or hardware.
For example, the apparatus may include a first sending module, a receiving module, a second sending module, and an identifying module.
The technical scheme provided by the embodiment of the application can have the following beneficial effects: through the communication between the vehicle control device and the battery box and the duty ratio of the pulse signal sent by the battery box, whether the communication between the vehicle control device and the battery box has a fault can be determined, so that when the communication between the vehicle control device and the battery box has no fault, the vehicle control device can identify the battery box through the serial number set by the battery box, and therefore, even if the vehicle replaces the battery box, a plurality of battery boxes can be accurately identified through the serial number of each battery box, and 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 battery box identification method of the first aspect.
The technical scheme provided by the embodiment of the application can have the following beneficial effects: through the communication between the vehicle control device and the battery box and the duty ratio of the pulse signal sent by the battery box, whether the communication between the vehicle control device and the battery box has a fault can be determined, so that when the communication between the vehicle control device and the battery box has no fault, the vehicle control device can identify the battery box through the serial number set by the battery box, and therefore, even if the vehicle replaces the battery box, a plurality of battery boxes can be accurately identified through the serial number of each battery box, and the purpose that the vehicle accurately identifies the battery boxes can be achieved.
In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the battery box identification method of the first aspect.
The technical scheme provided by the embodiment of the application can have the following beneficial effects: through the communication between the vehicle control device and the battery box and the duty ratio of the pulse signal sent by the battery box, whether the communication between the vehicle control device and the battery box has a fault can be determined, so that when the communication between the vehicle control device and the battery box has no fault, the vehicle control device can identify the battery box through the serial number set by the battery box, and therefore, even if the vehicle replaces the battery box, a plurality of battery boxes can be accurately identified through the serial number of each battery box, and the purpose that the vehicle accurately identifies the battery boxes can be achieved.
In a fifth aspect, the present application provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the computer program implements the battery box identification method of the first aspect.
The technical scheme provided by the embodiment of the application can have the following beneficial effects: through the communication between the vehicle control device and the battery box and the duty ratio of the pulse signal sent by the battery box, whether the communication between the vehicle control device and the battery box has a fault can be determined, so that when the communication between the vehicle control device and the battery box has no fault, the vehicle control device can identify the battery box through the serial number set by the battery box, and therefore, even if the vehicle replaces the battery box, a plurality of battery boxes can be accurately identified through the serial number of each battery box, and 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, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic view of an application scenario of an identification method for a battery box according to an embodiment of the present application;
fig. 2 is a flowchart of an identification method for a battery box according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a battery box for determining a fault according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a swapping station provided in the embodiment of the present application;
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
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in 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 obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments that can be made by one skilled in the art based on the embodiments in the present application in light of the present disclosure are within the scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings (if any) 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 application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the prior art provided in the background art, at least the following technical problems exist when a vehicle identifies a battery box:
with the development of electric vehicles, electric vehicles are increasingly popular with consumers, and the consumers are most concerned about the problem that the electric vehicles are difficult to charge.
In order to solve the above problems, one prior art method is to modularize and miniaturize the battery, that is, divide the battery into a plurality of battery boxes, each of which is suitable for being changed by a user in hand and charged. After modularizing and miniaturizing the battery, a plurality of battery boxes need to be combined in a certain manner and then installed in a vehicle. In order to make the operation flexible and improve the turnover rate of the battery box, 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 the problem that the vehicle cannot identify the battery boxes still exists.
In order to solve the above problems, another prior art method writes the serial number (ID) of each battery box into the battery box in advance, but this method has limitations, for example, to avoid the same ID number appearing in the same battery system, boxes of a plurality of battery boxes corresponding to different ID numbers need to be artificially bound together, which results in low utilization rate of the battery boxes, and when replacing the plurality of battery boxes, all the battery boxes in the whole vehicle need to be replaced as a whole, which is relatively complicated; meanwhile, after the plurality of battery boxes are installed in the vehicle, the probability of vehicle failure is increased, for example, a certain battery box is separated from the vehicle due to loose connectors between the battery boxes, and a serious safety accident may be caused once a battery box is separated from the vehicle and a timely protection measure is not taken.
In order to solve the above problems, the present application provides a battery box identification method, which determines whether communication between a vehicle control device and a battery box is faulty or not through communication between the vehicle control device and the battery box and a duty ratio of a pulse signal sent by the battery box, so that the vehicle control device can identify the battery box through a serial number set by the battery box when no fault is present between the vehicle control device and the battery box, and thus, even after the battery box is replaced by a vehicle, a plurality of battery boxes can be accurately identified through the serial number of each battery box, and therefore, the purpose of accurately identifying the battery box by the vehicle can be achieved. The terms referred to in the present application are explained first below.
Duty ratio: the ratio of the time occupied by the pulse to the total time during a continuous operating time.
The core idea of the battery box identification method provided by the application is that the vehicle control device and a plurality of battery boxes are connected in series, and IDs can be distributed to the plurality of battery boxes through the transceiving of pulse signals, so that a vehicle can identify the battery boxes through the IDs of each battery box; and the duty ratio of each sent pulse signal is preset, and 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 quickly and accurately positioned through the duty ratio of the pulse signal, the fault occurs can be alarmed, and traffic accidents of vehicles are avoided.
In one embodiment, the battery box identification method can be applied in an application scenario. Fig. 1 is a schematic view of an application scenario of the battery box identification method according to the embodiment of the present application, and as shown in fig. 1, in the 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 in communication connection with each battery box, and each battery box may also be in communication connection. The process in which the vehicle control apparatus identifies the 6 battery boxes may be as follows:
the first stage, the vehicle control device sends a PWM _ ID _ HVIL _ out signal, the period is less than 1000ms (can be set according to actual conditions), the duty ratio of the PWM _ ID _ HVIL _ out signal is 100%, and the battery box which receives the PWM _ ID _ HVIL _ out signal in a specified time sets the ID of the battery box to be 1 (called as a battery box 1); in the second stage, the battery box 1 sends a PWM1_ out signal with the period less than 1000ms (which can be set according to actual conditions), the duty ratio of the PWM1_ out signal is 95%, and the battery box receiving the PWM1_ out signal in a specified time sets the ID of the battery box to be 2 (called as a battery box 2); in the third stage, the battery box 2 sends a PWM2_ out signal with the period of less than 1000ms (which can be set according to actual conditions), the duty ratio of the PWM2_ out signal is 90%, and the battery box receiving the PWM2_ out signal in a specified time sets the ID of the battery box to be 3 (called as the battery box 3); in the fourth stage, the battery box 3 sends a PWM3_ out signal with the period of less than 1000ms (which can be set according to actual conditions), the duty ratio of the PWM3_ out signal is 85%, and the battery box receiving the PWM3_ out signal in a specified time sets the ID of the battery box to be 4 (called as the battery box 4); in the fifth stage, the battery box 4 sends a PWM4_ out signal with the period of less than 1000ms (which can be set according to actual conditions), the duty ratio of the PWM4_ out signal is 80%, and the battery box receiving the PWM4_ out signal in a specified time sets the ID of the battery box to be 5 (called as the battery box 5); in the sixth stage, the battery box 5 sends a PWM5_ out signal with the period of less than 1000ms (which can be set according to actual conditions), the duty ratio of the PWM5_ out signal is 75%, and the battery box receiving the PWM5_ out signal in a specified time sets the ID of the battery box to be 6 (called as the battery box 6); in the seventh stage, the battery box 6 transmits a PWM _ ID _ HVIL _ in signal with a duty cycle of 70% for a period < 1000ms (which may be set according to the actual situation), and the vehicle control apparatus 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 an expected 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 apparatus can accurately identify the corresponding battery box from the ID of each 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; PWM1_ out may be used to represent the PWM signal sent by battery box 1; PWM2_ out may be used to represent a PWM signal sent by battery box 2; PWM3_ out may be used to represent a PWM signal sent by battery box 3; PWM4_ out may be used to represent a PWM signal sent by battery box 4; PWM5_ out may be used to represent a PWM signal sent by battery box 5; PWM _ ID _ HVIL _ in may be used to represent a PWM signal sent by the battery box 6 that is received by the vehicle control apparatus.
In the above scenario, the identification process of the vehicle control device for 6 battery boxes is merely illustrated, and when there are other different numbers of battery boxes, the principle of the identification of the battery boxes by the vehicle control device is the same as the above principle.
With reference to the above scenario, the following describes in detail a technical solution of the identification method for a battery box according to the present application by using several specific embodiments.
Fig. 2 is a flowchart of an identification method for a battery box according to an embodiment of the present disclosure, and as shown in fig. 2, the method may include the following steps:
s201: the vehicle control device sends 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., the 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 entire process of identifying the battery box, so that the duty ratio of the first pulse signal can be set to be the maximum, for example, the duty ratio of the first pulse signal is 100%. The first preset period may be a preset period in which the vehicle control device transmits the first pulse signal, for example, the first preset period may be 1000 milliseconds (ms), or the first preset period may be any time less than 1000ms, so that the vehicle control device may transmit the first pulse signal to the first battery box according to the first preset period.
In the above-described aspect, the vehicle control apparatus may be a vehicle controller of the vehicle, or a main controller of a battery management system of the vehicle. The first pulse signal transmitted by 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 serial number as a first serial number.
In this step, the vehicle control device and the first battery box may be connected in series, so that after the vehicle controller sends the first pulse signal to the first battery box, if the first battery box can receive the first pulse signal within the first preset time period, it indicates that no problem occurs in the connection between the vehicle control device and the first battery box, and therefore, the first battery box may set its own number as the first number, for example, the number of the first battery box is 1, and at this time, the first battery may be referred to as battery box 1.
S203: and 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 ratio of the second pulse signal is a second preset value. The first battery box may perform feedback 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 according to the second preset period.
In the above scheme, the second preset period may be a preset period in which the first battery box sends 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 sent by the first battery box after receiving the first pulse signal, the duty ratio of the second pulse signal sent by the first battery box is attenuated, for example, the duty ratio of the second pulse signal may be 95%.
In the above scheme, the second pulse signal sent by the first battery box can be represented by PWM1_ out.
In the above-mentioned solution, if the number of the battery boxes is more than one, for example, there are two battery boxes, and the first battery box and the second battery box are connected in series, the first battery box will send a pulse signal to the second battery box after the number is set to 1, and the second battery box will send a pulse signal to the vehicle control device after the second battery box receives the pulse signal and sets the number value. Similarly, if more than two battery boxes exist, the pulse signals are sequentially sent backwards according to the series sequence of the battery boxes, and the pulse signals are sent to the vehicle control device by the last battery box.
S204: and if the vehicle control device receives the second pulse signal in a second preset time period and the second preset value is a value obtained 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.
In this step, the duty ratio of the second pulse signal sent by 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%, and 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 within the second preset time period and determines that the duty ratio of the second pulse signal is 95%, the vehicle control device can confirm that the first battery box is not abnormal, and therefore the vehicle control device can identify the first battery box according to the first number of the first battery box.
In the foregoing solution, if the vehicle control device receives the second pulse signal within the second preset time period, but the duty ratio of the second pulse signal is not 95%, for example, the duty ratio of the second pulse signal is 50%, the vehicle control device may determine that the first battery box is abnormal, and at this time, may send the first pulse signal to the vehicle control device, 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, and then fails.
According to the battery box identification method provided by the embodiment, whether the communication between the vehicle control device and the battery box is failed can be determined through the communication between the vehicle control device and the battery box and the duty ratio of the pulse signal sent by the battery box, so that when the communication between the vehicle control device and the battery box is not failed, the vehicle control device can identify the battery box through the number set by the battery box, and therefore even if the vehicle replaces the battery box, the battery boxes can be accurately identified through the number of each battery box, and the purpose that the vehicle can accurately identify the battery box can be achieved.
The method of identifying the battery box will be described in detail below.
In one embodiment, the vehicle further includes a second battery box; correspondingly, the first battery box sends a second pulse signal to the vehicle control device according to a second preset period, and the second pulse signal comprises: 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: if the second battery box receives a third pulse signal within a third preset time period, the second battery box sets the serial number as a second serial number; and the second battery box sends a second pulse signal to the vehicle control device according to a second preset period.
In the scheme, when the number of the battery boxes is two, the first battery box needs to send a third pulse signal to the second battery box, and when the second battery box receives the third pulse signal, the second battery box sends a second pulse signal to the vehicle control device. Therefore, the first battery box needs to send a third pulse signal to the second battery box according to a third preset period, and if the second battery box receives the third pulse signal in a third preset period, the second battery box may set its number as the second number, for example, the number of the second battery box is 2, and at this time, the second battery box may be referred to as battery box 2.
In the above scheme, 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 by 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 by the first battery box to the second battery box after receiving the first pulse signal, and therefore, the duty ratio of the third pulse signal may be a value obtained by attenuating the first pulse signal by a preset attenuation value, for example, 95%.
In the foregoing scheme, if the second battery box does not receive the third pulse signal within the third preset time period, it is indicated that the connection between the second battery box and the first battery box is abnormal, and the abnormality may be that a problem occurs in the transmission of the first battery box, or a problem occurs in the connection between the first battery box and the second battery box, or a problem occurs in the 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%, and is not a value after the third pulse signal is attenuated according to the preset attenuation 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 can be represented by PWM2_ 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 number corresponding to 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 according to the second number.
In this scheme, the second battery box can set up the serial number as the second serial number after receiving the third pulse signal that first battery box sent to can make vehicle control device discern the second battery box, consequently, when the quantity of battery box was a plurality of, the vehicle still can accurately discern the battery box that corresponds through the serial 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 the first preset time period, the first battery box sets the serial number as an unknown serial 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 is failed 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 within the first preset time period, the first battery box cannot accurately set its own number to a specific value, and therefore, in order to facilitate sending the pulse signal to other subsequent battery boxes or sending the pulse signal 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 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 the like. At this time, when the first battery box transmits the fourth pulse signal to another 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 scheme, after the vehicle control device finally receives the pulse signal, for example, in the case of only one first battery box, the vehicle control device may determine whether the battery box is faulty or not, and specifically the faulty battery box, according to the duty ratio of the finally received pulse signal, by receiving the fourth pulse signal of the first battery box.
In the above scheme, if a battery box offline fault, a wire harness disconnection fault, and the like occur, and any battery box does not receive any valid PWM signal within a specified time, 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 battery box which subsequently receives the PWM signal transmitted by the battery box can sequentially reduce the duty ratio of the PWM signal transmitted by the battery box by 5%. Finally, the 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 structural diagram of a battery box for determining a fault 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 of < 1000ms (which may be set according to actual conditions), a duty ratio of the PWM _ ID _ HVIL _ out signal is 100%, and a battery box receiving 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 with the period less than 1000ms (which can be set according to actual conditions), the duty ratio of the PWM1_ out signal is 95%, and the battery box receiving the PWM1_ out signal in a specified time sets the ID of the battery box to be 2 (called as a battery box 2); in the third stage, the battery box 2 sends a PWM2_ out signal, the period is less than 1000ms (can be set according to actual conditions), the duty ratio of the PWM2_ out signal is 90%, no battery box receives the PWM2_ out signal within a specified time, and the battery box which is not allocated with the ID sets the ID of the battery box to be X (called as the battery box X); in the fourth phase, the battery box X changes the duty cycle of the PWM signal it is to transmit, that is, the battery box X transmits the PWMx _ out signal, the period: the duty ratio of the PWMx _ out signal is 50 percent (can be set according to actual conditions), and the battery box receiving the PWMx _ out signal in a specified time sets the ID of the battery box to be X +1 (called the battery box X + 1); in the fifth stage, the battery box X +1 sends a PWMx +1_ out signal, and the period: the duty ratio of the PWMx +1_ out signal is 45 percent (can be set according to actual conditions), and the battery box receiving the PWMx +1_ out signal in a specified time sets the ID of the battery box to be X +2 (called the battery box X + 2); in the sixth stage, the battery box X +2 sends a PWMx +2_ out signal, with the cycle: the duty ratio of the PWMx +2_ out signal is 40 percent (can be set according to actual conditions), and the battery box receiving the PWMx +2_ out signal in a specified time sets the ID of the battery box to be X +3 (called the battery box X + 3); in the seventh stage, the battery box X +3 sends a PWM _ ID _ HVIL _ in signal, with the period: < 500ms (which can be set according to actual conditions), the duty ratio of the PWM _ ID _ HVIL _ in signal is 35%, and the vehicle control end receives the PWM _ ID _ HVIL _ in signal in 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 distribution of the battery box is not successful and that the battery box is in off-line fault, and preliminarily obtains: battery box X is online to battery box X +3 (battery box 1 and battery box 2 may be offline), and the last N online battery boxes may be determined according to the following calculation formula:
n ═(50% ((duty ratio of PWM _ ID _ HVIL _ in signal received by vehicle control device) × 100/5) +1
After substituting the values according to the seven stages, N ═ ((50% to 35%) × 100/5) +1 ═ 4 is obtained, that is, the last 4 cell boxes in the seven stages are online.
In the above scheme, the vehicle control device can determine the specific battery box with the fault according to the duty ratio of the finally received pulse signal, so that the accuracy rate of detecting the fault is improved.
In the above scheme, the duty ratio of the PWM signal transmitted and received when the battery box is normal may be as shown in table 1 below:
TABLE 1 list of duty ratios of transceiving PWM signals when battery box is normal
Figure BDA0003451323430000141
In the above scheme, the duty ratio of the PWM signal for transceiving when the battery box is abnormal may be as shown in table 2 below:
TABLE 2 Duty ratio List of transceiving PWM signals when battery box is abnormal
Figure BDA0003451323430000142
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 communicates with the first battery box through a controller area network, and the vehicle control device communicates 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 last battery box is the second battery box), each battery box can be accurately identified, the problem that the identification of 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 solved, the purpose that the vehicle accurately identifies each battery box is achieved, the vehicle control device can be respectively communicated with the first battery box and the second battery box, and the vehicle control device can be rapidly determined whether the first battery box and the second battery box are on line or not.
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 a controller area network (CAN communication network), and also CAN be realized through wired interaction such as ethernet and carrier communication, or CAN be realized through wireless interaction such as wireless network (WIFI) and radio frequency.
In one embodiment, the method further comprises: the vehicle control device respectively sends response instructions to the first battery box and the second battery box; 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 the first battery box and the second battery box have offline faults.
In this aspect, the vehicle control apparatus may communicate with the first battery box and the second battery box, respectively, and thus, the vehicle control apparatus may quickly determine whether the first battery box and the second battery box are online by sending response instructions to the first battery box and the second battery box.
In the above solution, the vehicle control device may then send a response instruction through the CAN communication network to request the on-line battery box to report the on-line condition, and the vehicle control device may determine whether the battery box is on-line through the response instruction as shown in table 3 below, taking the battery box 1 and the battery box 2 as an example:
TABLE 3 Online situation table for battery box
Figure BDA0003451323430000151
In one embodiment, if the battery box is directly used under the condition of unbalanced voltage of the battery box, the current of the battery box is impacted by circulation, so that the power device of the battery box is broken down, and therefore, if a plurality of battery boxes are used, the battery boxes are used after the voltage is balanced.
In this scheme, a charging station may be provided, fig. 4 is a schematic structural diagram of the charging station provided in this embodiment of the present application, and as shown in fig. 4, the charging station at least includes a charging station control device, a plurality of charging bins, and bidirectional chargers (represented by bidirectional charger 1, bidirectional charger 2, …, and bidirectional charger N in fig. 4) corresponding to the plurality of charging bins, each charging bin may be provided with a battery box (represented by battery box 1, battery box 2, …, and battery box N in fig. 4), the charging station and each bidirectional charger may perform signal interaction, each bidirectional charger may perform energy interaction, and each bidirectional charger and the corresponding battery box may also perform energy interaction. When the battery boxes are detached from the vehicle and put into the battery changing station for charging, the battery boxes can be scattered and placed in charging positions of the battery changing station, each battery box corresponds to one charging position, all the charging positions are standard positions, and the charging positions are not sequentially divided, the battery changing 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 changing station control device can initiatively initiate a voltage balancing command, and the bidirectional charger immediately executes the voltage balancing after receiving the voltage balancing command of the battery changing station control device, so that the voltage of the battery boxes is balanced. The voltage balancing strategy comprises discharging the high-voltage battery box, charging the low-voltage battery box and the like, so that the battery box is rapidly balanced to the middle voltage. Therefore, the problem that the battery boxes cannot be directly used when the voltages of the battery boxes are unbalanced can be solved.
In the above scheme, the charging station control device may be a station control system of the charging station, or a centralized control system of a charger, and the like. The signal interaction between the battery replacement station control device and the bidirectional charger CAN be wireless interaction, such as WIFI, radio frequency and the like, and CAN also be wired interaction, such as Ethernet, CAN communication, carrier communication and the like.
According to the battery box identification method provided by the embodiment, whether the communication between the vehicle control device and the battery box is failed can be determined through the communication between the vehicle control device and the battery box and the duty ratio of the pulse signal sent by the battery box, so that when the communication between the vehicle control device and the battery box is not failed, the vehicle control device can identify the battery box through the number set by the battery box, and therefore even if the vehicle replaces the battery box, the battery boxes can be accurately identified through the number of each battery box, and the purpose that the vehicle can accurately identify the battery box can be achieved.
On the whole, the technical scheme provided by the application is a technical implementation method which can improve the accuracy of identifying the battery box by the vehicle and can also improve the accuracy of identifying the fault by the vehicle.
Fig. 5 is a schematic structural diagram of an identification apparatus for a battery box according to an embodiment of the present application, and as shown in fig. 5, the identification apparatus 500 for a battery box includes:
the first sending module 501 is configured to send a first pulse signal to a first battery box by a vehicle control device according to a first preset period, where a duty ratio of the first pulse signal is a first preset value;
a receiving module 502, configured to set the serial number as a first serial number if the first battery box receives the first pulse signal within a first preset time period;
a second sending module 503, configured to send a second pulse signal to the vehicle control device according to a second preset period, where a duty ratio 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 apparatus receives the second pulse signal within a second preset time period and the second preset value is a value after the first preset value is attenuated according to a preset attenuation value.
Optionally, the second sending module 503 is further configured to send, by the first battery box, a third pulse signal to the second battery box according to a third preset period, where a duty ratio of the third pulse signal is a third preset value, and correspondingly, the apparatus is further configured to set the serial number as the second serial number if the second battery box receives the third pulse signal within a third preset time period; and the second battery box sends a second pulse signal to the vehicle control device according to a second preset period.
Optionally, the apparatus is further configured such that after the vehicle control apparatus identifies the first battery box according to the first number, the vehicle control apparatus identifies the second battery box according to the second number.
Optionally, the device is further configured to set the serial number to an unknown serial 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 is failed according to the first unknown number.
Optionally, 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 communicates with the first battery box through a controller domain network, and the vehicle control device communicates with the second battery box through the controller domain network.
Optionally, the device is further configured to send response instructions to the first battery box and the second battery box respectively by the vehicle control device; 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 the first battery box and the second battery box have offline faults.
The identification apparatus for a battery box provided in this embodiment is used to implement the technical solution of the identification method for a battery box in the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application, where the terminal device 600 includes:
processor 611, memory 612, 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 solution of the identification method of the battery box provided by the foregoing method embodiments.
In the terminal device, the memory 612 and the processor 611 are directly or indirectly electrically connected to each other, so as to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines, such as a bus. The memory 612 stores computer-executable instructions for implementing the battery pack identification method, including at least one software functional module, which may be stored in the memory in the form of software or firmware, and the processor 611 executes various functional applications and data processing by running the software programs and modules stored in the memory 612.
The Memory may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory is used for storing programs, and the processor executes the programs after receiving the execution instructions. Further, the software programs and modules within the aforementioned memories 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 having signal processing capabilities. The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like. The various methods, steps, and logic blocks disclosed 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 present application further provides a computer-readable storage medium, where the computer-readable storage medium includes a program, and the program is used, when being executed by a processor, to implement the technical solution of the method for identifying a battery box provided in the method embodiment.
The present application further provides a computer program product comprising: and the computer program is used for realizing the technical scheme of the identification method of the battery box provided by the embodiment of the method when being executed by the processor.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions 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 solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A battery box identification method 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, wherein 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 serial number as a first serial 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;
and if the vehicle control device receives the second pulse signal in a second preset time period and the second preset value is a value obtained after the first preset value is attenuated according to a preset attenuation value, the vehicle control device identifies the first battery box according to the first number.
2. The method of claim 1, wherein the vehicle further comprises a second battery box;
correspondingly, the first battery box sends a second pulse signal to the vehicle control device according to a second preset period, and the second pulse signal comprises:
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 serial number as a second serial 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 of 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. The method of claim 1, further comprising:
if the first battery box does not receive the first pulse signal within the first preset time period, the first battery box sets a serial number as an unknown serial number;
the first battery box sends a fourth pulse signal to the vehicle control device according to the 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 a fourth preset time period, the vehicle control device determines that the connection between the first battery box and the vehicle control device is in fault according to the first unknown number.
5. The method according to any one of claims 1 to 4, 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 communicates with the first battery box through a controller area network, and the vehicle control device communicates with the second battery box through a controller area network.
6. The method of claim 5, further comprising:
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.
7. An identification device of a battery box, characterized by comprising: module for performing the method of identification of a battery box according to any one of claims 1 to 6.
8. 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 battery box identification method of any one of claims 1 to 6.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of identifying a battery box according to any one of claims 1 to 6.
10. A computer program product, characterized in that it comprises a computer program which, when being executed by a processor, is adapted to carry out the battery box identification method according to any one of claims 1 to 6.
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