CN117002281A - Electric vehicle - Google Patents

Electric vehicle Download PDF

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Publication number
CN117002281A
CN117002281A CN202210456362.6A CN202210456362A CN117002281A CN 117002281 A CN117002281 A CN 117002281A CN 202210456362 A CN202210456362 A CN 202210456362A CN 117002281 A CN117002281 A CN 117002281A
Authority
CN
China
Prior art keywords
battery
battery pack
voltage dividing
voltage
electric vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210456362.6A
Other languages
Chinese (zh)
Inventor
李鲲
伍国辉
张沈越
宋敬育
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang CFMOTO Power Co Ltd
Original Assignee
Zhejiang CFMOTO Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang CFMOTO Power Co Ltd filed Critical Zhejiang CFMOTO Power Co Ltd
Priority to CN202210456362.6A priority Critical patent/CN117002281A/en
Publication of CN117002281A publication Critical patent/CN117002281A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

The embodiment of the invention provides an electric vehicle, which is provided with at least one battery pack, wherein the battery pack is used for providing power for the operation of the electric vehicle; the electric vehicle further includes: the battery pack comprises at least two battery bins, wherein each battery bin is used for accommodating the battery pack, a voltage dividing module is arranged in each battery bin, the first end of each voltage dividing module is grounded, and the voltage dividing parameters of the voltage dividing modules in different battery bins are different; the battery pack is provided with a detection pin, when the battery pack is placed in the battery compartment, the second end of the voltage dividing module is connected to the detection pin, and the detection pin is used for detecting the voltage dividing amount of the voltage dividing module in the battery compartment, so that the battery pack can determine the bin number of the battery compartment where the battery pack is placed according to the voltage dividing amount of the voltage dividing module of the battery compartment. Thereby improving the reliability and fault tolerance of the bin number detection method.

Description

Electric vehicle
[ field of technology ]
The embodiment of the invention relates to the technical field of electric vehicles, in particular to an electric vehicle.
[ background Art ]
Each battery pack is provided with a detection pin for being connected with an interface of the electric vehicle, so that the bin number of the battery pack is determined. For example, after two battery packs are connected with an electric vehicle, the two battery packs adjust the voltage of the detection pins to be power supply voltage, the electric vehicle cable suspends the detection pins of one battery pack, and the battery pack suspended by the detection pins detects that the voltage of the detection pins is power supply voltage; the electric vehicle cable adjusts the voltage of the detection pin of the other battery pack to 0V, and the voltage of the detection pin detected by the other battery pack is 0V. If the bin number of the battery pack with the suspended detection pin is 1, the bin number of the other battery pack is 2.
If the battery compartment fails, the electric vehicle cable does not adjust the voltage of the detection pin of the other battery pack to 0V, and the voltage detected by the other battery pack is also the power supply voltage, then the bin number of the other battery pack is also 1, and at this time, the bin number of the battery compartment is wrongly identified, and information conflict occurs on the communication bus of the electric vehicle, so that the detection method of the bin number of the battery compartment in the related technology is low in reliability and poor in fault tolerance.
[ invention ]
In view of the above, the embodiment of the invention provides an electric vehicle for solving the problems of low reliability and poor fault tolerance of the bin number detection method in the related art.
In a first aspect, an embodiment of the present invention provides an electric vehicle, where at least one battery pack is provided on the electric vehicle, the battery pack is used to power operation of the electric vehicle, and the electric vehicle further includes: the battery pack comprises at least two battery bins, wherein each battery bin is used for accommodating the battery pack, a voltage dividing module is arranged in each battery bin, the first end of each voltage dividing module is grounded, and the voltage dividing parameters of the voltage dividing modules in different battery bins are different;
the battery pack is provided with a detection pin, when the battery pack is placed in the battery compartment, the second end of the voltage dividing module is connected to the detection pin, and the detection pin of the battery pack is used for detecting the voltage dividing quantity of the voltage dividing module in the battery compartment, so that the battery pack can determine the bin number of the battery compartment where the battery pack is placed according to the voltage dividing quantity of the voltage dividing module of the battery compartment.
In one possible implementation, the battery pack includes a battery management unit, a pull-up resistor, and a power supply;
the power supply is connected to a first end of the pull-up resistor;
the battery management unit and the second end of the pull-up resistor are connected to the detection pin.
In one possible implementation, the battery pack includes a battery management unit, and the battery compartment further includes a pull-up resistor and a power supply;
the power supply is connected to a first end of the pull-up resistor;
the battery management unit is connected to the detection pin;
when the battery pack is placed in the battery compartment, the second end of the pull-up resistor is connected to the detection pin.
In one possible implementation, the battery pack is connected to the communication bus of the electric vehicle when the battery pack is placed in the battery compartment;
the battery pack is used for determining the identity number of the battery pack according to the bin number of the battery bin and sending a notification message to the communication bus, wherein the notification message comprises the identity number, and the identity number is used for identifying the battery pack.
In one possible implementation manner, when the second end of the voltage dividing module is connected to the detection pin, the battery pack is configured to determine, if the voltage dividing amount is determined to be within a normal voltage range, a bin number corresponding to the normal voltage range as a bin number of a battery compartment in which the battery pack is placed, where different normal voltage ranges correspond to different bin numbers.
In one possible implementation, the normal voltage range is a range of values greater than or equal to a first normal voltage threshold and less than or equal to a second normal voltage threshold.
In one possible implementation manner, when the second end of the voltage dividing module is connected to the detection pin, the battery pack is configured to determine that a connection fault occurs in a battery compartment in which the battery pack is placed if the voltage dividing amount is determined to be within a connection fault voltage range.
In one possible implementation, the connection fault voltage range is a range of values greater than or equal to a first abnormal voltage threshold and less than or equal to a supply voltage.
In one possible implementation manner, when the second end of the voltage dividing module is connected to the detection pin, the battery pack is configured to determine that the voltage dividing module fails in a battery compartment where the battery pack is placed if the voltage dividing amount is determined to be within a battery compartment failure voltage range.
In one possible implementation, the battery compartment fault voltage range is a range of values greater than or equal to a ground voltage and less than or equal to a second abnormal voltage threshold.
According to the technical scheme of the electric vehicle, the battery pack is provided with the detection pins, when the battery pack is placed in the battery compartment, the second ends of the voltage division modules are connected to the detection pins, and the voltage division amounts of the different voltage division modules detected by the detection pins are different, so that the bin numbers of the battery pack determined according to the different voltage division amounts are also different, bin numbers of the different battery compartments can be accurately identified, information conflict on a communication bus of the electric vehicle is avoided, and further reliability and fault tolerance of bin number detection of the battery compartment are improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another electric vehicle according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another electric vehicle according to an embodiment of the present invention.
[ detailed description ] of the invention
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Depending on the context, the word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to detection". Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
With the development of electric vehicle technology, electric vehicles are increasingly used. Among them, electric vehicles include, but are not limited to, electric motorcycles, for example, electric motorcycles including 2-wheel electric motorcycles, 3-wheel electric motorcycles, or 4-wheel electric motorcycles, wherein the 4-wheel electric motorcycles may also be referred to as all-terrain vehicles. Electric vehicles may each use one or more battery packs to drive the motor. The battery pack provides electric energy for an electric motor of the electric vehicle, and the electric motor converts the electric energy of the battery pack into mechanical energy through a transmission device or a direct driving wheel and a working device, so that the electric vehicle is driven to run. After the user connects at least one battery pack with the electric vehicle, the battery pack needs to confirm the bin number of the battery bin where the battery bin is located, so that the communication bus of the electric vehicle is connected smoothly, information conflict is avoided, and the communication bus requirement of the electric vehicle is met.
However, when the battery compartment is internally failed, if the voltage of the detection pin of one battery pack is not adjusted to 0V and the voltage of the detection pin of the other battery pack is adjusted to VDD, the two battery packs detect that the voltages of the detection pins are the same, and at this time, the bin numbers of the two battery packs are the same, so that the bin numbers of the battery compartment are erroneously identified, thereby causing information collision on the communication bus of the electric vehicle. Therefore, in the related art, the detection method of the bin number of the battery bin is low in reliability and poor in fault tolerance.
In order to improve reliability and fault tolerance of a bin number detection method, an embodiment of the invention provides an electric vehicle. Fig. 1 is a schematic structural diagram of an electric vehicle according to an embodiment of the present invention, where, as shown in fig. 1, at least one battery pack is disposed on the electric vehicle, and the battery pack is used to provide power for operation of the electric vehicle. The electric vehicle further includes: the battery compartment is used for accommodating battery packs, each battery compartment is internally provided with a voltage dividing module, the first end of each voltage dividing module is grounded, and the voltage dividing parameters of the voltage dividing modules in different battery compartments are different; the battery pack is provided with detection pins, and when the battery pack is placed in the battery compartment, the second end of the voltage dividing module is connected to the detection pins, and the detection pins are used for detecting the voltage dividing quantity of the voltage dividing module in the battery compartment, so that the battery pack can determine the bin number of the battery compartment in which the battery pack is placed according to the voltage dividing quantity of the voltage dividing module in the battery compartment.
As shown in fig. 1, for example, the at least two battery bins may include a battery bin 1, a battery bin 2, … …, a battery bin n, a voltage dividing module 1 is provided in the battery bin 1, a voltage dividing module 2 is provided in the battery bin 2, and the like, and a voltage dividing module n is provided in the battery bin n. Taking the battery compartment 1 as an example, the first end a of the voltage dividing module 1 is grounded, and when the battery pack is placed in the battery compartment 1, the second end b of the voltage dividing module 1 is connected to the detection pin p, so that the detection pin p detects the voltage dividing amount of the voltage dividing module 1 in the battery compartment 1. Because the partial pressure parameters of the partial pressure module 1, the partial pressure modules 2 and … … and the partial pressure module n are different, the partial pressure amounts of different partial pressure modules detected by the detection pin p are different, so that the bin numbers of the battery pack determined according to the different partial pressure amounts are also different, the bin numbers of different battery bins can be correctly identified, information conflict on a communication bus of the electric vehicle is avoided, and the reliability and fault tolerance of the bin number detection of the battery bin are improved.
In an embodiment of the present invention, in one possible implementation manner, the voltage dividing module is a voltage dividing resistor, and the voltage dividing parameter is a resistance value of the voltage dividing resistor. Fig. 2 is a schematic structural diagram of another electric vehicle according to an embodiment of the present invention, where, as shown in fig. 2, at least one battery pack is disposed on the electric vehicle, and the battery pack is used to provide power for operation of the electric vehicle. The electric vehicle further includes at least two battery compartments, for example, the at least two battery compartments include a battery compartment 1, a battery compartment 2, … …, a battery compartment n. The battery compartment is used for accommodating battery packs, and each battery compartment is internally provided with a divider resistor. As shown in fig. 1 and 2, the voltage dividing module 1 is a voltage dividing resistor R1, the voltage dividing module 2 is a voltage dividing resistor R2, and so on, and the voltage dividing module n is a voltage dividing resistor Rn; a divider resistor R1 is arranged in the battery compartment 1, a divider resistor R2 is arranged in the battery compartment 2, and a divider resistor Rn is arranged in the battery compartment n. The first end a of each voltage dividing resistor is grounded, and the resistance values of the voltage dividing resistors in different battery bins are different, for example, as shown in fig. 2, the resistance values of the voltage dividing resistors R1, R2, … … and Rn are different.
In one possible implementation, as shown in fig. 2, the battery pack includes a battery management unit, a pull-up resistor R, and a power supply. The power supply provides an operating voltage of VDD, for example, VDD of 5V. A power supply is connected to the first end c of the pull-up resistor R; the battery management unit and the second terminal d of the pull-up resistor R are connected to the detection pin p. In the embodiment of the invention, the battery management unit may be a micro control unit (Microcontroller Unit, abbreviated as MCU).
In one possible implementation, to reduce the production management costs and the use costs for the user, the battery packs in different battery bins are identical to facilitate the user's replacement of the battery packs after they have failed. For example, as shown in fig. 2, the volume and capacity of the battery pack of the battery compartment 1, the battery pack of the battery compartment 2, … …, and the battery pack of the battery compartment n are the same.
The battery pack is provided with a detection pin p, which is a pin structure extended from the battery pack. Specifically, the detection pin p is a pin structure extending from a battery management unit within the battery pack. When the battery pack is placed in the battery compartment, the second end b of the voltage dividing resistor is connected to the detection pin p, taking the battery compartment 1 in fig. 2 as an example, when the battery pack is placed in the battery compartment 1, the second end b of the voltage dividing resistor 1 is connected to the detection pin p, and the detection pin p can detect the voltage dividing amount of the voltage dividing resistor R1 in the battery compartment 1, so that the battery pack of the battery compartment 1 determines the bin number of the battery compartment 1 in which the battery pack is placed according to the voltage dividing amount of the voltage dividing resistor R1 of the battery compartment 1.
In the embodiment of the present invention, for example, as shown in fig. 2, the battery management unit, the second terminal d of the pull-up resistor R, and the second terminal b of the voltage dividing resistor are connected to the node m. Taking the battery compartment 1 as an example, the battery pack is placed in the battery compartment 1, so that the second end b of the voltage dividing resistor R1 is connected to the detection pin p, and a circuit path is formed by the power supply, the pull-up resistor R and the voltage dividing resistor R1. The battery management unit detects the partial pressure amount on the detection pin p, and determines the bin number of the battery bin 1 where the battery pack is placed according to the partial pressure amount of the partial pressure resistor R1 of the battery bin.
In one possible implementation manner, when the second end b of the voltage dividing resistor is connected to the detection pin p, if the battery pack determines that the voltage dividing amount is within the normal voltage range, the bin numbers corresponding to the normal voltage range are determined to be bin numbers of battery bins where the battery pack is placed, and different normal voltage ranges correspond to different bin numbers, so that detection of bin numbers of battery bins where more than two battery packs are placed can be supported. Specifically, if the battery management unit determines that the voltage division amount is within the normal voltage range, the bin number corresponding to the normal voltage range is determined as the bin number of the battery compartment where the battery pack is placed. In the embodiment of the invention, the voltage dividing amounts on the detection pin p are different because the resistance values of the voltage dividing resistors in different battery bins are different, and the voltage dividing amounts detected by the battery management unit are different. The normal voltage range is a numerical range which is larger than or equal to the first normal voltage threshold and smaller than or equal to the second normal voltage threshold, a plurality of normal voltage ranges are provided, and each normal voltage range corresponds to one bin number. For example, as shown in fig. 2, taking battery box 1 and battery box 2 as examples, since the resistance value of voltage dividing resistor R1 of battery box 1 is different from the resistance value of voltage dividing resistor R2 of battery box 2, the voltage dividing amount of voltage dividing resistor R1 detected by detection pin p of the battery pack in battery box 1 is different from the voltage dividing amount of voltage dividing resistor R2 detected by detection pin p of the battery pack in battery box 2. If the battery pack of the battery compartment 1 detects that the voltage division amount of the detection pin p is V1, and the voltage division amount is judged to be positioned in a normal voltage range, the bin number corresponding to the normal voltage range is 1, and the battery pack determines that the bin number of the battery compartment 1 is 1; if the battery pack of the battery compartment 2 detects that the voltage division amount of the detection pin p is V2, and the voltage division amount is judged to be positioned in another normal voltage range, the bin number corresponding to the normal voltage range is 2, and the battery pack determines that the bin number of the battery compartment 2 is 2.
In one possible implementation manner, when the second end b of the voltage dividing resistor is connected to the detection pin p, if the battery pack determines that the voltage dividing amount is within the connection fault voltage range, it is determined that the battery compartment where the battery pack is placed has a connection fault. Specifically, if the battery management unit judges that the voltage division amount is within the connection fault voltage range, it determines that a connection fault occurs in a battery compartment where the battery pack is placed. In the embodiment of the invention, the connection fault voltage range is a numerical range which is larger than or equal to a first abnormal voltage threshold and smaller than or equal to a power supply voltage, wherein the first abnormal voltage threshold is larger than a second normal voltage threshold. Connection faults include, but are not limited to, the pull-up resistor R failing and/or the node m being disconnected from the second terminal b of the divider resistor, etc. For example, as shown in fig. 2, taking the battery compartment 1 as an example, if the connection between the second end b of the voltage dividing resistor R1 and the node m is broken, the battery pack detects that the divided voltage of the detection pin p is the power supply voltage, and determines that the divided voltage is within the connection fault voltage range, and the battery pack determines that the connection fault occurs in the battery compartment 1.
In one possible implementation manner, when the second end b of the voltage dividing resistor is connected to the detection pin p, if the battery pack determines that the voltage dividing amount is within the fault voltage range of the battery compartment, it is determined that the voltage dividing resistor of the battery compartment is faulty. Specifically, if the battery management unit judges that the voltage division amount is within the fault voltage range of the battery compartment, the battery management unit determines that the voltage division resistance of the battery compartment is faulty. In the embodiment of the invention, the fault voltage range of the battery compartment is a numerical range which is larger than or equal to the grounding voltage and smaller than or equal to a second abnormal voltage threshold, wherein the second abnormal voltage threshold is smaller than the first normal voltage threshold. For example, as shown in fig. 2, taking the battery compartment 2 as an example, the voltage dividing resistor R2 is short-circuited, if the battery pack detects that the voltage dividing amount of the detection pin p is 0V, it is determined that the voltage dividing amount is within the fault voltage range of the battery compartment, and the battery pack determines that the voltage dividing resistor of the battery compartment 2 has a fault.
In the embodiment of the present invention, as an alternative, the ground voltage is smaller than the second abnormal voltage threshold, the second abnormal voltage threshold is smaller than the first normal voltage threshold, the first normal voltage threshold is smaller than the second normal voltage threshold, the second normal voltage threshold is smaller than the first abnormal voltage threshold, and the first abnormal voltage threshold is smaller than the power supply voltage.
In the embodiment of the invention, when the battery pack determines that the voltage division amount of the detection pin is in the connection fault voltage range or the battery compartment fault voltage range, the bin number of the battery compartment is not required to be detected, and at the moment, the inside of the battery compartment is faulty. For example, as shown in fig. 2, taking the battery compartment 1 as an example, if the battery pack determines that the voltage division amount of the detection pin p is within the connection fault voltage range, it is not necessary to detect the bin number of the battery compartment 1. As shown in fig. 2, taking the battery compartment 1 as an example, if the battery pack determines that the voltage division amount of the detection pin p is within the fault voltage range of the battery compartment, it is not necessary to detect the bin number of the battery compartment 1.
In another possible implementation manner of the embodiment of the present invention, the voltage dividing module is a voltage dividing resistor, and the voltage dividing parameter is a resistance value of the voltage dividing resistor. Fig. 3 is a schematic structural diagram of another electric vehicle according to an embodiment of the present invention, where, as shown in fig. 3, at least one battery pack is disposed on the electric vehicle, and the battery pack is used to provide power for operation of the electric vehicle. The electric vehicle further includes at least two battery compartments, for example, the at least two battery compartments include a battery compartment 1, a battery compartment 2, … …, a battery compartment n. The battery compartment is used for accommodating battery packs, and each battery compartment is internally provided with a divider resistor. As shown in fig. 1 and 3, the voltage dividing module 1 is a voltage dividing resistor R1, the voltage dividing module 2 is a voltage dividing resistor R2, and so on, and the voltage dividing module n is a voltage dividing resistor Rn; a divider resistor R1 is arranged in the battery compartment 1, a divider resistor R2 is arranged in the battery compartment 2, and a divider resistor Rn is arranged in the battery compartment n. The first end a of each divider resistor is grounded, and the resistances of the divider resistors in different battery bins are different. As shown in fig. 3, the voltage dividing resistors R1, R2, … …, and Rn have different resistance values.
In one possible implementation, as shown in fig. 3, the battery pack includes a battery management unit, and a pull-up resistor R and a power supply are further included in the battery compartment. The power supply provides an operating voltage VDD, for example, VDD of 12V. A power supply is connected to the first end c of the pull-up resistor R; the second end d of the pull-up resistor R is connected to the sense pin p. The battery management unit and the second terminal d of the pull-up resistor R are connected to the detection pin p.
In one possible implementation, to reduce the production management costs and the use costs for the user, the battery packs in different battery bins are identical to facilitate the user's replacement of the battery packs after they have failed. For example, as shown in fig. 3, the volume and capacity of the battery pack of the battery compartment 1, the battery pack of the battery compartment 2, … …, and the battery pack of the battery compartment n are the same.
The battery pack is provided with a detection pin p, which is a pin structure extended from the battery pack. Specifically, the detection pin p is a pin structure extending from a battery management unit within the battery pack. When the battery pack is placed in the battery compartment, the second end b of the voltage dividing resistor is connected to the detection pin p, and the second end d of the pull-up resistor R is connected to the detection pin p. Taking the battery compartment 1 in fig. 3 as an example, when the battery pack is placed in the battery compartment 1, the second end d of the pull-up resistor R and the second end b of the voltage dividing resistor 1 are connected to the detection pin p, and the detection pin p can detect the voltage dividing amount of the voltage dividing resistor R1 in the battery compartment 1, so that the battery pack of the battery compartment 1 determines the bin number of the battery compartment 1 where the battery pack is placed according to the voltage dividing amount of the voltage dividing resistor R1 of the battery compartment 1.
In the embodiment of the present invention, as shown in fig. 3, the battery management unit, the second terminal d of the pull-up resistor R, and the second terminal b of the voltage dividing resistor are connected to the node m. Taking the battery compartment 1 as an example, the battery pack is placed in the battery compartment 1, so that the second end b of the voltage dividing resistor R1 is connected to the detection pin p, and a circuit path is formed by the power supply, the pull-up resistor R and the voltage dividing resistor R1. The battery management unit detects the partial pressure amount on the detection pin p, and determines the bin number of the battery bin 1 where the battery pack is placed according to the partial pressure amount of the partial pressure resistor R1 of the battery bin.
In one possible implementation manner, when the second end b of the voltage dividing resistor is connected to the detection pin p and the second end d of the pull-up resistor R is connected to the detection pin p, if the battery pack determines that the voltage dividing amount is within the normal voltage range, the bin number corresponding to the normal voltage range is determined to be the bin number of the battery bin where the battery pack is placed, and different normal voltage ranges correspond to different bin numbers, so that detection of bin numbers of battery bins where more than two battery packs are placed can be supported. In the embodiment of the invention, the voltage dividing amounts on the detection pin p are different because the resistance values of the voltage dividing resistors in different battery bins are different, and the voltage dividing amounts detected by the battery management unit are different. The normal voltage range is a range of values greater than or equal to the first normal voltage threshold and less than or equal to the second normal voltage threshold. For example, as shown in fig. 3, taking battery box 1 and battery box 2 as examples, since the resistance value of voltage dividing resistor R1 of battery box 1 is different from the resistance value of voltage dividing resistor R2 of battery box 2, the voltage dividing amount of voltage dividing resistor R1 detected by detection pin p of the battery pack in battery box 1 is different from the voltage dividing amount of voltage dividing resistor R2 detected by detection pin p of the battery pack in battery box 2. If the battery pack of the battery compartment 1 detects that the voltage division amount of the detection pin p is V1, and the voltage division amount is judged to be positioned in a normal voltage range, the bin number corresponding to the normal voltage range is 1, and the battery pack determines that the bin number of the battery compartment 1 is 1; if the battery pack of the battery compartment 2 detects that the voltage division amount of the detection pin p is V2, and the voltage division amount is judged to be positioned in another normal voltage range, the bin number corresponding to the normal voltage range is 2, and the battery pack determines that the bin number of the battery compartment 2 is 2.
In one possible implementation manner, when the second end b of the voltage dividing resistor is connected to the detection pin p and the second end d of the pull-up resistor R is connected to the detection pin p, if the battery pack determines that the voltage dividing amount is within the connection fault voltage range, it is determined that the battery compartment where the battery pack is placed has a connection fault. In the embodiment of the invention, the connection fault voltage range is a numerical range which is larger than or equal to a first abnormal voltage threshold and smaller than or equal to a power supply voltage, wherein the first abnormal voltage threshold is larger than a second normal voltage threshold. Connection faults include, but are not limited to, the pull-up resistor R failing and/or the node m being disconnected from the second terminal b of the divider resistor, etc. As shown in fig. 3, taking the battery compartment 2 as an example, if the connection between the second end b of the voltage dividing resistor R1 and the node m is disconnected, the battery pack detects that the divided voltage of the detection pin p is the power supply voltage, and determines that the divided voltage is within the connection fault voltage range, and the battery pack determines that the connection fault occurs in the battery compartment 2.
In one possible implementation manner, when the second end b of the voltage dividing resistor is connected to the detection pin p and the second end d of the pull-up resistor R is connected to the detection pin p, if the battery pack determines that the voltage dividing amount is within the fault voltage range of the battery compartment, it is determined that the voltage dividing resistor fault occurs in the battery compartment. In the embodiment of the invention, the fault voltage range of the battery compartment is a numerical range which is larger than or equal to the grounding voltage and smaller than or equal to a second abnormal voltage threshold, wherein the second abnormal voltage threshold is smaller than the first normal voltage threshold. As shown in fig. 3, taking the battery compartment 1 as an example, the voltage dividing resistor R1 is short-circuited, if the battery pack detects that the voltage dividing amount of the detection pin p is 0V, it is determined that the voltage dividing amount is within the fault voltage range of the battery compartment, and the battery pack determines that the voltage dividing resistor of the battery compartment 1 has a fault.
In the embodiment of the invention, when the battery pack determines that the voltage division amount of the detection pin is in the connection fault voltage range or the battery compartment fault voltage range, the bin number of the battery compartment is not required to be detected, and at the moment, the inside of the battery compartment is faulty. For example, as shown in fig. 3, taking the battery compartment 1 as an example, if the battery pack determines that the voltage division amount of the detection pin p is within the connection fault voltage range, it is not necessary to detect the bin number of the battery compartment 1. As shown in fig. 3, taking the battery compartment 1 as an example, if the battery pack determines that the voltage division amount of the detection pin p is within the fault voltage range of the battery compartment, it is not necessary to detect the bin number of the battery compartment 1.
In the embodiment shown in fig. 2 and 3, the battery pack is connected to the communication bus of the electric vehicle when the battery pack is placed in the battery compartment. The battery pack is used for determining the identification number of the battery pack according to the bin number of the battery bin and sending a notification message to the communication bus, wherein the notification message comprises the identification number, and the identification number is used for identifying the battery pack. In the embodiment of the invention, each bin number corresponds to a unique IDentity (ID), and the battery pack determines the ID of the battery pack according to the bin number of the battery bin. The electric vehicle passes the ID of the battery pack to distinguish between the different battery packs. For example, the battery pack is connected to a communication bus of the electric vehicle, and the battery pack sends a notification message to the communication bus, where the notification message includes an identification number and power data information of the battery pack. The electric vehicle includes a display screen for displaying an amount of power of the electric vehicle. The display screen acquires a notification message sent by the battery pack from the communication bus and displays the electric quantity of the battery pack according to the notification message. Or the battery pack sends a notification message to the communication bus, wherein the notification message comprises an identification number and basic information of the battery pack, and the basic information comprises at least one of voltage, current and version number of the battery pack. The electric vehicle comprises a control unit, the control unit can acquire a notification message sent by the battery pack from the communication bus, and the control unit distinguishes different battery packs through the IDs of the battery packs.
In the technical scheme of the electric vehicle provided by the embodiment of the invention, the battery pack is provided with the detection pin, when the battery pack is placed in the battery compartment, the second end of the voltage dividing resistor is connected to the detection pin, and the voltage dividing amounts of different voltage dividing resistors detected by the detection pin are different, so that the bin numbers of the battery pack determined according to the different voltage dividing amounts are also different, the bin numbers of different battery compartments can be accurately identified, information conflict on a communication bus of the electric vehicle is avoided, and further the reliability and fault tolerance of bin number detection of the battery compartment are improved.
The electric vehicle provided by the embodiment of the invention realizes the method for automatically identifying the bin positions for the multi-battery packs, and has the advantages of simple identification method and high identification accuracy.
In the embodiment shown in fig. 2, the voltage dividing module of the battery compartment only comprises one voltage dividing resistor, so that the circuit in the battery compartment is simple in structure and easy to realize.
In the embodiment shown in fig. 3, the voltage dividing resistor and the pull-up resistor are arranged in the battery compartment, and the pull-up resistor is not required to be arranged in the battery pack, so that the circuit structure in the battery pack is simple and easy to realize.
In another possible implementation manner of the embodiment of the present invention, the voltage dividing module is a capacitor, and the voltage dividing parameter is the capacitance of the capacitor, which is not specifically shown. For example, the voltage division module 1 is a capacitor C1, the voltage division module 2 is a capacitor C2, and so on, and the voltage division module n is a capacitor Cn. Taking the battery compartment 1 as an example, when the battery pack is placed in the battery compartment 1, the detection pin p detects the voltage division amount of the capacitor Cn, so that the battery pack in the battery compartment 1 determines the bin number of the battery compartment 1 in which the battery pack is placed according to the voltage division amount of the capacitor Cn in the battery compartment 1. Therefore, bin numbers of different battery bins can be accurately identified, information conflict on a communication bus of the electric vehicle is avoided, and reliability and fault tolerance of bin number detection of the battery bins are improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.

Claims (10)

1. An electric vehicle having at least two battery packs disposed thereon for powering the operation of the electric vehicle, characterized in that,
the electric vehicle further includes: the battery pack comprises at least two battery bins, wherein each battery bin is used for accommodating the battery pack, a voltage dividing module is arranged in each battery bin, the first end of each voltage dividing module is grounded, and the voltage dividing parameters of the voltage dividing modules in different battery bins are different;
the battery pack is provided with a detection pin, when the battery pack is placed in the battery compartment, the second end of the voltage dividing module is connected to the detection pin, and the detection pin is used for detecting the voltage dividing amount of the voltage dividing module in the battery compartment, so that the battery pack can determine the bin number of the battery compartment where the battery pack is placed according to the voltage dividing amount of the voltage dividing module of the battery compartment.
2. The electric vehicle of claim 1, characterized in that the battery pack includes a battery management unit, a pull-up resistor, and a power supply;
the power supply is connected to a first end of the pull-up resistor;
the battery management unit and the second end of the pull-up resistor are connected to the detection pin.
3. The electric vehicle of claim 1, characterized in that the battery pack includes a battery management unit, and the battery compartment further includes a pull-up resistor and a power supply;
the power supply is connected to a first end of the pull-up resistor;
the battery management unit is connected to the detection pin;
when the battery pack is placed in the battery compartment, the second end of the pull-up resistor is connected to the detection pin.
4. The electric vehicle of claim 1, characterized in that the battery pack is connected to a communication bus of the electric vehicle when the battery pack is placed in the battery compartment;
the battery pack is used for determining the identity number of the battery pack according to the bin number of the battery bin and sending a notification message to the communication bus, wherein the notification message comprises the identity number, and the identity number is used for identifying the battery pack.
5. The electric vehicle of claim 1, wherein when the second end of the voltage dividing module is connected to the detection pin, the battery pack is configured to determine a bin number corresponding to a normal voltage range as the bin number of the battery compartment in which the battery pack is placed if the voltage dividing amount is determined to be within the normal voltage range, and different normal voltage ranges correspond to different bin numbers.
6. The electric vehicle of claim 5, characterized in that the normal voltage range is a range of values greater than or equal to a first normal voltage threshold and less than or equal to a second normal voltage threshold.
7. The electric vehicle of claim 1, wherein when the second end of the voltage dividing module is connected to the detection pin, the battery pack is configured to determine that a connection fault occurs in a battery compartment in which the battery pack is placed if the voltage dividing amount is determined to be within a connection fault voltage range.
8. The electric vehicle of claim 7, characterized in that the connection fault voltage range is a range of values greater than or equal to a first abnormal voltage threshold and less than or equal to a supply voltage.
9. The electric vehicle of claim 1, wherein when the second end of the voltage dividing module is connected to the detection pin, the battery pack is configured to determine that the voltage dividing module fails in a battery compartment in which the battery pack is placed if the voltage dividing amount is determined to be within a battery compartment failure voltage range.
10. The electric vehicle of claim 9, characterized in that the battery compartment fault voltage range is a range of values greater than or equal to a ground voltage and less than or equal to a second abnormal voltage threshold.
CN202210456362.6A 2022-04-27 2022-04-27 Electric vehicle Pending CN117002281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210456362.6A CN117002281A (en) 2022-04-27 2022-04-27 Electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210456362.6A CN117002281A (en) 2022-04-27 2022-04-27 Electric vehicle

Publications (1)

Publication Number Publication Date
CN117002281A true CN117002281A (en) 2023-11-07

Family

ID=88560432

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210456362.6A Pending CN117002281A (en) 2022-04-27 2022-04-27 Electric vehicle

Country Status (1)

Country Link
CN (1) CN117002281A (en)

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