CN113120139A - Power supply system, control method and device thereof and electric vehicle - Google Patents

Power supply system, control method and device thereof and electric vehicle Download PDF

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Publication number
CN113120139A
CN113120139A CN202110559918.XA CN202110559918A CN113120139A CN 113120139 A CN113120139 A CN 113120139A CN 202110559918 A CN202110559918 A CN 202110559918A CN 113120139 A CN113120139 A CN 113120139A
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China
Prior art keywords
module
battery module
main control
super capacitor
power supply
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CN202110559918.XA
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Chinese (zh)
Inventor
王言子
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Beijing Qisheng Technology Co Ltd
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Beijing Qisheng Technology Co Ltd
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Priority to CN202110559918.XA priority Critical patent/CN113120139A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
    • 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
    • B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
    • 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
    • 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)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

An embodiment of the present disclosure provides a power supply system, a control method and apparatus thereof, and an electric vehicle, the power supply system including: the device comprises a battery module, a super capacitor, a main control module and a switch module; the switch module is used for switching on or off the electrical connection between the main control module and the battery module; the main control module is used for disconnecting the electric connection between the main control module and the battery module through the control switch module when the battery module is determined not to be capable of receiving the feedback current, so that the super capacitor receives the feedback current; the super capacitor is used for receiving the feedback current and supplying power to the motor by utilizing the feedback current. In the scheme, when the battery module cannot receive the feedback current, the super capacitor receives the feedback current, so that the energy utilization rate of the electric vehicle is improved, and the endurance time of the electric vehicle is prolonged.

Description

Power supply system, control method and device thereof and electric vehicle
Technical Field
The embodiment of the disclosure relates to the technical field of energy, in particular to a power supply system, a control method and a control device of the power supply system and an electric vehicle.
Background
In recent years, electric vehicles have come into the field of vision of the public and are increasingly accepted by the public. Endurance is an important factor that limits the development of electric vehicles. Therefore, how to improve the cruising ability of the electric vehicle is a technical problem to be solved urgently at present.
At present, the energy utilization rate is generally improved by adopting a mode of carrying out electric energy feedback on a battery, so that the cruising ability is improved, namely the cruising time of an electric vehicle is prolonged. Specifically, in the running process of the electric vehicle, the energy generated in the speed regulation process of the electric vehicle is converted into electric energy, and the electric energy is charged into the battery so as to complete electric energy feedback of the battery.
However, the temperature ranges at the time of normal charging are different for different types of batteries. When the actual temperature of the battery is not within the temperature range of normal charging, the electric energy feedback cannot be carried out on the battery, so that the energy utilization rate of the electric vehicle is low, and the endurance time is short.
Disclosure of Invention
The embodiment of the disclosure provides a power supply system, a control method and a control device of the power supply system and an electric vehicle, which are used for improving the energy utilization rate of the electric vehicle and prolonging the endurance time of the electric vehicle.
In a first aspect, an embodiment of the present disclosure provides a power supply system applied to an electric vehicle, where the power supply system includes: the electric vehicle comprises a battery module, a super capacitor, a main control module and a switch module, wherein one terminal of the main control module is electrically connected with a motor of the electric vehicle, the other terminal of the main control module is electrically connected with the battery module through the switch module, and the super capacitor is connected with the main control module in parallel;
the switch module is used for switching on or off the electrical connection between the main control module and the battery module;
the main control module is used for disconnecting the electric connection between the main control module and the battery module through the control switch module when the battery module is determined not to be capable of receiving the feedback current, so that the super capacitor receives the feedback current;
and the super capacitor is used for receiving the feedback current and supplying power to the motor by using the feedback current.
In a second aspect, an embodiment of the present disclosure provides a control method for a power supply system, which is applied to an electric vehicle, where the power supply system includes a battery module, a super capacitor, a main control module, and a switch module, and the control method for the power supply system includes: when the electric vehicle is in an electric energy feedback state, determining whether the battery module can receive feedback current or not; when the battery module is determined to be incapable of receiving the feedback current, the electric connection between the main control module and the battery module is disconnected through the control switch module, so that the super capacitor receives the feedback current, wherein the feedback current is used for supplying power to a motor of the electric vehicle.
In a third aspect, an embodiment of the present disclosure provides a control device of a power supply system, which is applied to an electric vehicle, where the power supply system includes a battery module, a super capacitor, a main control module, and a switch module, and the control device of the power supply system includes: the determining module is used for determining whether the battery module can receive feedback current or not when the electric vehicle is in an electric energy feedback state; and the processing module is used for disconnecting the electric connection between the main control module and the battery module through the control switch module when the battery module is determined not to be capable of receiving the feedback current, so that the super capacitor receives the feedback current, wherein the feedback current is used for supplying power to a motor of the electric vehicle.
In a fourth aspect, an embodiment of the present disclosure provides an electric vehicle including: the power supply system according to the first aspect, and the control device of the power supply system according to the third aspect.
In a fifth aspect, embodiments of the present disclosure provide a computer-readable storage medium having a computer program stored thereon; the computer program, when executed, implements a control method for a power supply system as set forth in the second aspect.
In a sixth aspect, the present disclosure provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for controlling the power supply system according to the second aspect is implemented.
An embodiment of the present disclosure provides a power supply system including: the electric vehicle comprises a battery module, a super capacitor, a main control module and a switch module, wherein one terminal of the main control module is electrically connected with a motor of the electric vehicle, the other terminal of the main control module is electrically connected with the battery module through the switch module, and the super capacitor is connected with the main control module in parallel; the switch module is used for switching on or off the electrical connection between the main control module and the battery module; the main control module is used for disconnecting the electric connection between the main control module and the battery module through the control switch module when the battery module is determined not to be capable of receiving the feedback current, so that the super capacitor receives the feedback current; the super capacitor is used for receiving the feedback current and supplying power to the motor by utilizing the feedback current. In the scheme, when the battery module cannot receive the feedback current, the super capacitor receives the feedback current, so that the energy utilization rate of the electric vehicle is improved, and the endurance time of the electric vehicle is prolonged.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic view of a scene provided by an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a power supply system according to an embodiment of the disclosure;
fig. 3 is a schematic flowchart of a control method of a power supply system according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of a power supply system according to another embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a power supply system according to yet another embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a power supply system according to yet another embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a power supply system according to yet another embodiment of the present disclosure;
fig. 8 is a schematic flowchart of a control method of a power supply system according to another embodiment of the disclosure;
fig. 9 is a schematic structural diagram of a control device of a power supply system according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of an electric vehicle according to an embodiment of the present disclosure.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
It is to be understood that the embodiments described are only a subset of the embodiments of the disclosure, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present disclosure, belong to the protection scope of the embodiments of the present disclosure.
In the context of embodiments of the present disclosure, the term "comprising" and its various variants may be understood as open-ended terms, which mean "including but not limited to"; the term "based on" may be understood as "based at least in part on"; the term "one embodiment" may be understood as "at least one embodiment"; the term "another embodiment" may be understood as "at least one other embodiment". Other terms that may be present but are not mentioned herein should not be construed or limited in a manner that would contradict the concept upon which the embodiments of the disclosure are based unless explicitly stated. Note that in the following description, it is possible to use "vehicles" as an example of the vehicles. The scope of embodiments of the present disclosure is not so limited and any vehicle capable of employing the charging system described herein is within the scope of embodiments of the present disclosure.
In the description of the embodiments of the present disclosure, it should be noted that, unless otherwise explicitly stated or limited, the terms "connected," "communicating," and "connecting" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.
The description includes reference to the accompanying drawings, which form a part hereof. The figures show diagrams in accordance with exemplary embodiments. These embodiments, which may also be referred to herein as "examples," are described in sufficient detail to enable those skilled in the art to practice embodiments of the claimed subject matter described herein. The embodiments may be combined, other embodiments may be utilized, or structural, logical, and electrical changes may be made without departing from the scope and spirit of the claimed subject matter. It should be appreciated that the embodiments described herein are not intended to limit the scope of the subject matter, but rather to enable any person skilled in the art to practice, make, and/or use the subject matter.
For convenience of understanding, an application scenario of the embodiment of the present disclosure is first described with reference to fig. 1:
fig. 1 is a schematic view of a scene provided in an embodiment of the present disclosure. As shown in fig. 1, the scenario includes: an electric vehicle 100 and a power supply system 200.
It should be noted that the electric vehicle provided in the embodiment of the present disclosure may be any type of vehicle, such as an electric bicycle, an electric motorcycle, an electric automobile, and the like, and the embodiment of the present disclosure is not particularly limited, and it should be understood that the following description of the co-electric vehicle of the embodiment of the present disclosure uses an electric bicycle as an example, and is not limited to this in practical application.
In some embodiments, the power supply system 200 may include at least one battery for storing power and supplying power to the motor of the electric vehicle 100.
In practical applications, in order to improve the cruising ability of an electric vehicle, the energy utilization rate is generally improved by performing electric energy feedback on a battery. That is, in the driving process of the electric vehicle 100, the energy generated in the speed regulation process of the electric vehicle 100 is converted into the electric energy, the electric energy is recharged into the battery, and the collected electric energy is used for supplying power to the motor of the electric vehicle 100, so that the endurance time of the electric vehicle is prolonged.
However, the temperature ranges of the regenerative charging are different for different types of batteries. For example, a Lithium iron phosphate Battery (Lithium iron phosphate Battery) which is widely used due to the advantages of high safety and low cost has a normal discharge temperature range of-20 ℃ to 60 ℃, that is, the Battery can normally supply power to a motor at-20 ℃, but the Lithium iron phosphate Battery has a normal charge temperature range of 0 ℃ to 60 ℃, that is, when the temperature is lower than 0 ℃ or higher than 60 ℃, the Battery cannot charge feedback electric energy into the Battery, so that the waste of the feedback electric energy is caused, the energy utilization rate of an electric vehicle is low, and the endurance time is short.
In view of this, the present disclosure provides a power supply system, a control method and a control device thereof, and an electric vehicle, where a super capacitor is added in the power supply system 200, when it is determined that a battery module cannot receive a feedback current, electric energy feedback is implemented based on the super capacitor in the power supply system 200, and the super capacitor receives the feedback current and supplies power to a motor of the electric vehicle 100 by using the feedback current, so as to implement electric energy feedback, improve an energy utilization rate of the electric vehicle, and prolong a duration of the electric vehicle.
The following describes technical solutions of embodiments of the present disclosure and how to solve the above technical problems in detail with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present disclosure will be described below with reference to the accompanying drawings.
Fig. 2 is a schematic structural diagram of a power supply system according to an embodiment of the present disclosure. As shown in fig. 2, the power supply system 200 provided by the embodiment of the present disclosure includes: battery module 201, super capacitor 202, master control module 203 and switch module 204. One terminal of the main control module 203 is electrically connected with the motor 101 of the electric vehicle 100, the other terminal of the main control module 203 is electrically connected with the battery module 201 through the switch module 204, and the super capacitor 202 is connected in parallel with the main control module 203.
In some embodiments, both the battery module 201 and the super capacitor 202 may be dc disconnected from the main control module 203.
And the switch module 204 is used for conducting or disconnecting the electrical connection between the main control module 203 and the battery module 201. Specifically, when the switch module 204 is in the on state, both the battery module 201 and the super capacitor 202 are connected to the main control module 203, and when the switch module 204 is in the off state, only the super capacitor 202 is connected to the main control module 203, and as for the specific structure of the switch module 204, the specific description in the following embodiments is provided.
The main control module 203 is configured to disconnect the electrical connection between the main control module 203 and the battery module 201 through the control switch module 204 when it is determined that the battery module 201 cannot receive the feedback current, so that the super capacitor 202 receives the feedback current.
It should be noted that, regarding the specific type of the main control module 203, the embodiment of the present disclosure is not limited specifically, for example, the main control module 203 may be a Micro Control Unit (MCU), and in some embodiments, may also be referred to as a Single Chip Microcomputer (Single Chip Microcomputer) or a Single Chip Microcomputer.
When the main control module 203 is disconnected from the battery module 201, only the super capacitor 202 is electrically connected to the main control module 203, and when the electric energy is fed back, the super capacitor 202 receives and stores the feedback current generated by the motor 101, and when the electric vehicle 100 is in a discharging state, the stored feedback current is used for supplying power to the motor 101.
The power supply system 200 provided by the embodiment of the present disclosure includes: when the electric vehicle 100 is in an electric energy feedback state and the battery modules 201 and 201 cannot receive feedback current, the battery module 201, the super capacitor 202, the main control module 203 and the switch module 204 may receive the feedback current, so as to improve the energy utilization rate of the electric vehicle 100 and prolong the endurance time of the electric vehicle 100.
Fig. 3 is a flowchart illustrating a control method of a power supply system according to an embodiment of the disclosure. On the basis of the embodiment shown in fig. 2, the embodiment of the present disclosure describes the above scheme in more detail, and the execution subject may be the electric vehicle or the main control module. As shown in fig. 3, a control method of a power supply system provided by the embodiment of the present disclosure includes the following steps:
s301, determining that the electric vehicle is in an electric energy feedback state at present.
In practical applications, there are various methods for determining the electric energy feedback state, and the embodiment of the present disclosure is not limited specifically. For example, whether the electric vehicle 100 is currently in the electric power regeneration state may be determined according to the operation conditions of the electric vehicle 100. For example, if it is detected that the electric vehicle 100 is currently braking or decelerating, it is determined that the electric vehicle 100 is currently in the electric energy feedback state; correspondingly, if it is detected that the electric vehicle 100 is currently in a starting, accelerating or constant speed running state, it is determined that the electric vehicle 100 is not currently in the electric energy feedback state.
S302, whether the battery module can receive feedback current is determined.
Specifically, if at least one of the following is satisfied, it is determined that the battery module 201 cannot receive the feedback current:
(1) determining that the temperature of the battery module 201 is less than a first temperature threshold;
(2) determining that the temperature of the battery module 201 is greater than a second temperature threshold;
(3) determining that the remaining capacity of the battery module 201 is greater than a remaining capacity threshold;
accordingly, it is determined that the battery module 201 can receive the feedback current if at least one of the following is satisfied:
(1) determining that the temperature of the battery module 201 is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold;
(2) determining that the remaining capacity of the battery module 201 is less than or equal to a remaining capacity threshold;
the first temperature threshold is the lowest charging temperature of the battery module 201, and the second temperature threshold is the highest charging temperature of the battery module 201.
For example, taking the battery module 201 as a lithium iron phosphate battery as an example, the normal charging temperature range is 0 ℃ to 60 ℃, that is, the first temperature threshold of the battery module 201 is 0 ℃, the second temperature threshold is 60 ℃, and when the current temperature of the battery module 201 is between 0 ℃ and 60 ℃ and the remaining power is less than or equal to the remaining power threshold, it is determined that the battery module 201 can currently receive the feedback current; accordingly, if it is determined that the current temperature of the battery module 201 is less than or equal to 0 ℃, or the current temperature of the battery module 201 is less than or equal to 60 ℃, or the current remaining capacity of the battery module 201 is greater than the remaining capacity threshold, it is determined that the battery module 201 cannot currently receive the feedback current.
It should be understood that the remaining capacity (SOC) may reflect the current State Of Charge Of the battery, and is a main basis for preventing the power battery from being overcharged and overdischarged, and in the embodiment Of the present disclosure, the battery module 201 may be protected by determining whether the battery module 201 can receive the feedback current by determining the current remaining capacity Of the battery module 201, so as to prolong the service life Of the battery module 201.
And S303, when the battery module is determined not to be capable of receiving the feedback current, the electric connection between the main control module and the battery module is disconnected through the control switch module, so that the super capacitor receives the feedback current.
It should be noted that the switch module 204 may be a switch tube, and in this step, the on/off of the main control module 203 and the battery module 201 may be controlled by controlling the on/off of the switch tube, in practical applications, the structures of the switch modules 204 of different types of electric vehicles are also different, and the following describes the control processes of several switch modules 204 with different structures with reference to the embodiments shown in fig. 4 to fig. 7:
fig. 4 is a schematic structural diagram of a power supply system according to another embodiment of the present disclosure. As shown in fig. 4, the switch module 204 includes a first switch tube S1, wherein a drain of the first switch tube S1 is electrically connected to the battery module 201, and a source of the first switch tube S1 is electrically connected to a terminal of the main control module 203.
Specifically, for the power supply system 200 provided in the embodiment of the present disclosure, the step S303 may be: when it is determined that the battery module 201 cannot receive the feedback current, the first switch tube S1 is turned off, and at this time, only the super capacitor 202 is connected to the main control module 203, and the generated feedback current is charged into the super capacitor 202.
The first switching transistor S1 in the above embodiment is exemplified by a MOS transistor, but is not limited thereto.
Fig. 5 is a schematic structural diagram of a power supply system according to yet another embodiment of the present disclosure. As shown in fig. 5, the switch module 204 provided by the embodiment of the present disclosure may include a first switch tube S1 and a resistor R1, wherein a drain of the first switch tube S1 is electrically connected to the battery module 201, one end of the resistor R1 is connected to a source of the first switch tube S1, and the other end of the resistor R1 is electrically connected to a terminal of the main control module 203.
For the power supply system 200 provided in the embodiment of the present disclosure, the step S303 may be: when it is determined that the battery module 201 cannot receive the feedback current, the first switching tube S1 is turned off. At this time, only the super capacitor 202 is conducted with the main control module 203, and the generated feedback current will be charged into the super capacitor 202.
Fig. 6 is a schematic structural diagram of a power supply system according to yet another embodiment of the present disclosure. As shown in fig. 6, the switch module 204 provided in the embodiment of the present disclosure includes: a first switch tube S1, a resistor R1, and a second switch tube S2. The drain of the second switch tube S2 is electrically connected to the battery module 201, the source of the second switch tube S2 is electrically connected to the terminal of the main control module 203, and the first switch tube S1 and the resistor R1 are electrically connected to the second switch tube S2 after being connected in series.
For the power supply system 200 provided in the embodiment of the present disclosure, the step S303 may be: when it is determined that the battery module 201 cannot receive the feedback current, the first switch tube S1 and the second switch tube S2 are turned off, and at this time, only the super capacitor 202 is turned on with the main control module 203, and the generated feedback current is charged into the super capacitor 202.
Fig. 7 is a schematic structural diagram of a power supply system according to yet another embodiment of the present disclosure. As shown in fig. 7, the switch module 204 provided in the embodiment of the present disclosure includes: the circuit comprises a first switch tube S1, a resistor R1, a second switch tube S2 and a third switch tube S3.
The first switch tube S1 and the resistor R1 are connected in series and then connected in parallel with the second switch tube S2, the drain of the third switch tube S3 is electrically connected to the battery module 201, the source of the third switch tube S3 is electrically connected to the drain of the second switch tube S2, and the source of the second switch tube S2 is electrically connected to the main control module 203.
For the power supply system 200 provided in the embodiment of the present disclosure, the step S303 may be: when it is determined that the battery module 201 cannot receive the feedback current, the third switch tube S1 is turned off, or the second switch tube S2 and the third switch tube S3 are turned off, at this time, only the super capacitor 202 is turned on with the main control module 203, and the generated feedback current is charged into the super capacitor 202.
It should be noted that the structure of the switch module 204 provided in the embodiments provided in fig. 4 to fig. 7 is exemplary, and in practical application, the switch module 204 may further include more elements, which are not described in detail herein.
And S304, when the battery module is determined to be capable of receiving the feedback current, the main control module is conducted to be electrically connected with the battery module through the control switch module so that the battery module and the super capacitor receive the feedback current.
In this step, when the battery module 201 can receive the feedback current, the switch tube in the switch module 203 is controlled to be turned on, so that the battery module 201 and the super capacitor 202 receive the feedback current. Specifically, for the power supply system 200 shown in fig. 4 and 5, the present step is: turning on the first switch tube S1; for the power supply system 200 shown in fig. 6, the present steps are: either the first switch tube S1 or the second switch tube S2 is turned on, or both are turned on; for the power supply system 200 shown in fig. 7, the present steps are: the third switching unit S3 and the first switching unit S1 are turned on, or the third switching unit S3 and the second switching unit S2 are turned on, or both of them are turned on.
It should be noted that, after the main control module 203 and the battery module 201 are electrically connected through the switch module 204, the battery module 201 and the super capacitor 202 may both receive the feedback current, and as for the way of receiving the feedback current and the magnitude of the feedback current, the embodiment of the disclosure is not limited specifically.
The power supply system provided by the embodiment of the disclosure includes: the battery module 201, the super capacitor 202, the main control module 203 and the switch module 204 can receive the feedback current by the super capacitor 202 when the electric vehicle 100 is in the electric energy feedback state and the battery module 201 cannot receive the feedback current, so that the energy utilization rate of the electric vehicle is improved and the endurance time of the electric vehicle is prolonged. In addition, by providing the switch modules in various structures, the power supply system of the embodiment of the disclosure has higher flexibility, so that different types of electric vehicles can be adapted.
In some embodiments, when the electric vehicle 100 completes the electric energy feedback, that is, when the electric vehicle 100 enters the discharging state, the electric motor 101 needs to be powered, and the power supply process of the electric vehicle 100 is described in detail below with reference to specific embodiments:
fig. 8 is a flowchart illustrating a control method of a power supply system according to another embodiment of the disclosure. As shown in fig. 8, the power supply system control method provided by the embodiment of the present disclosure includes the following steps:
and S311, determining that the electric vehicle is in a discharging state.
It should be understood that there are various methods for determining that the electric vehicle 100 is in the discharge state, and the embodiment of the present disclosure is not particularly limited. For example, whether the electric vehicle 100 is in the discharging state may be determined according to the operation condition of the electric vehicle 100, and if it is detected that the electric vehicle 100 is currently in the starting, accelerating or constant speed operation state, it is determined that the electric vehicle 100 is currently in the discharging state; accordingly, if it is detected that the electric vehicle 100 is currently braking or decelerating, it is determined that the electric vehicle 100 is not currently in the discharging state.
And S312, controlling the battery module and/or the super capacitor to supply power to the motor.
In some embodiments, after the current feedback is completed, the power supply states of the battery module 201 and the super battery 202 may be determined according to the current states of the battery module 201 and the super battery 202. For convenience of understanding, step S312 is described in detail below with reference to steps S3121 to S3124:
s3121, determining a voltage difference between the battery module and the super capacitor.
In practical applications, after the super capacitor 202 receives feedback electric energy, the voltage of the super capacitor 202 increases, and if the voltage value of the super capacitor 202 is higher than the voltage value of the battery module 201 and the voltage difference between the super capacitor and the battery module is large, if the battery module 201 is directly used to supply power to the motor at this time, the generated current may impact the battery module 201, resulting in a failure of the battery module 201. Therefore, the power supply states of the battery module 201 and the super battery 202 need to be determined according to the voltage difference between the battery module 201 and the super capacitor 202, so as to prevent the current from impacting the battery module 201, thereby protecting the battery module 201 and finally prolonging the service life of the battery system 200.
And S3122, determining whether the voltage difference is greater than a voltage threshold value.
It should be noted that the voltage difference threshold corresponding to different power supply systems 200 is different, and the voltage difference threshold may be a fixed value or may be calculated in real time. For the power supply system 200 shown in fig. 4, the voltage difference threshold may be a fixed value, for example, the voltage difference threshold may be 0; for the power supply system 200 shown in fig. 5, 6, and 7, the voltage difference threshold may be calculated according to the resistance of the resistor R1 and the maximum current that can be borne by the resistor R1, for example, the voltage difference threshold may be the product of the resistance of the resistor R1 and the maximum current that can be borne.
And S3123, when the voltage difference is greater than the voltage threshold, the electric connection between the main control module and the battery module is disconnected through the control switch module, so that the super capacitor supplies power to the motor.
In some embodiments, when the voltage of the super capacitor 202 is greater than the voltage of the battery module 201, and the voltage difference between the super capacitor 202 and the battery module 201 is greater than the voltage threshold, the super capacitor 202 can only supply power to the motor to protect the battery module 201, and therefore, the main control module 203 needs to be electrically disconnected from the battery module 201 by controlling the switch module 204. It should be understood that the manner of disconnecting the electrical connection between the main control module 203 and the battery module 201 corresponding to the power supply system 200 with different structures is different, and specific manners thereof may refer to the embodiment shown in fig. 3, and are not described herein again.
And S3124, when the voltage difference is less than or equal to the voltage threshold, the main control module is conducted to be electrically connected with the battery module through the control switch module, so that the battery module and the super capacitor supply power for the motor.
In this step, the power supply system 200 having the above structure is also different in the way of electrically connecting the main control module 203 and the battery module 201. For example, for the voltage system 200 in the embodiment shown in fig. 4, when the voltage difference is less than or equal to 0, the first switching tube S1 is turned on, and at this time, the battery module 201 and the super capacitor 202 are both in communication with the main control module 203, and are used to simultaneously supply power to the motor 101.
For the voltage system 200 in the embodiment shown in fig. 5, when the voltage difference is less than or equal to the voltage difference threshold, the first switch tube S1 is turned on, and at this time, the battery module 201 and the super capacitor 202 are both connected to the main control module 203 and are powered by the main control module 203 and the super capacitor, where the voltage difference threshold is a product of a resistance value of the resistor R1 and a maximum current that can be borne by the motor 101.
For the power supply system 200 in the embodiments shown in fig. 6 and fig. 7, during the discharging process of the battery module 201, since a certain voltage difference still exists between the battery module 201 and the super capacitor 202, in order to avoid that the generated current still causes current impact on the battery module 201, the current needs to be shunted through the resistor R1, so as to further protect the battery module 201.
On one hand, for the power supply system 200 in the embodiment shown in fig. 6, the present step specifically includes: when the voltage difference is determined to be less than or equal to the voltage threshold, the first switch tube S1 is turned on, and the second switch tube S2 is turned off, so that the current is shunted by the resistor R1, thereby further protecting the battery module 201 (at this time, the battery module 201 and the super capacitor 202 are simultaneously conducted to supply power to the motor 101).
Further, when the voltage difference between the battery module 201 and the super capacitor 202 is smaller than or equal to the first voltage threshold, since the voltage difference between the battery module 201 and the super capacitor 202 has reached the safe value, the resistor R1 is not needed to perform shunting, and at this time, the second switching tube S2 is turned on, and the first switching tube S1 is turned off (the battery module 201 and the super capacitor 202 are currently conducting power to the motor 101 at the same time).
On the other hand, for the power supply system 200 in the embodiment shown in fig. 7, the present step specifically includes: when the voltage difference is determined to be less than or equal to the voltage threshold, the first switch tube S1 and the third switch tube S3 are turned on, and the second switch tube S2 is turned off, so that the current is shunted by the resistor R1, thereby further protecting the battery module (at this time, the battery module 201 and the super capacitor 202 are simultaneously conducted to supply power to the motor 101).
Further, when the voltage difference between the battery module 201 and the super capacitor 202 is smaller than or equal to the first voltage threshold, since the voltage difference between the battery module 201 and the super capacitor 202 has reached the safe value, the resistor R1 is not needed to perform shunting, and at this time, the second switching tube S2 is turned on, and the first switching tube S1 is turned off (the battery module 201 and the super capacitor 202 are currently conducting power to the motor 101 at the same time).
It should be noted that, for the specific size of the first voltage threshold, the embodiment of the present disclosure is not particularly limited. For example, it may be any value smaller than the voltage difference threshold, for example, the first voltage threshold may be 0, that is, the above steps are: when the voltages of the battery module 201 and the super capacitor 202 are equal, the second switch tube S2 is turned on, and the first switch tube S1 is turned off.
The power supply system provided by the embodiment of the disclosure includes: when the electric vehicle is in a discharging state, the battery module 201, the super capacitor 202, the main control module 203 and the switch module 204 can be a module for supplying power to the motor according to dynamic adjustment of voltage difference between the battery module and the super capacitor, so that the battery module is prevented from being impacted by current, and the service life of a power supply system is prolonged. In addition, by providing the switch modules with various structures, the power supply system of the embodiment of the disclosure has higher flexibility and can adapt to different types of electric vehicles.
Fig. 9 is a schematic structural diagram of a control device of a power supply system according to an embodiment of the present disclosure. The control device 900 of the power supply system is applied to an electric vehicle, and is used for controlling the power supply system to supply power to the electric vehicle or receive feedback current of a battery vehicle, wherein the power supply system comprises a battery module, a super capacitor and a switch module. As shown in fig. 9, the control device 900 of the power supply system includes:
the determining module 901 is configured to determine whether the battery module can receive a feedback current when the electric vehicle is in an electric energy feedback state; and the processing module 902 is configured to disconnect the electrical connection between the main control module and the battery module through the control switch module when it is determined that the battery module cannot receive the feedback current, so that the super capacitor receives the feedback current, where the feedback current is used to supply power to a motor of the electric vehicle.
In some embodiments, the determining module 901 is specifically configured to determine that the battery module cannot receive the feedback current if at least one of the following conditions is satisfied: determining that a temperature of the battery module is less than a first temperature threshold; determining that the temperature of the battery module is greater than a second temperature threshold; determining that the residual capacity of the battery module is greater than a residual capacity threshold; the first temperature threshold is the lowest charging temperature of the battery module, and the second temperature threshold is the highest charging temperature of the battery module.
In some embodiments, the determining module 901 is further configured to determine that the battery module is capable of receiving the feedback current; the processing module 902 is further configured to, when it is determined that the battery module can receive the feedback current, electrically connect the main control module and the battery module through the control switch module, so that the battery module and the super capacitor receive the feedback current.
In some embodiments, the determining module 901 is specifically configured to determine that the battery module can receive the feedback current if at least one of the following conditions is satisfied: determining that the temperature of the battery module is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold; determining that the remaining capacity of the battery module is less than or equal to a remaining capacity threshold; the first temperature threshold is the lowest charging temperature of the battery module, and the second temperature threshold is the highest charging temperature of the battery module.
In some embodiments, the determining module 901 is further configured to determine that the electric vehicle is in a discharging state, and the processing module 902 is further configured to control the battery module and/or the super capacitor to supply power to the motor when the electric vehicle is determined to be in the discharging state.
In some embodiments, the processing module 902 is specifically configured to determine a voltage difference between the battery module and the super capacitor; and according to the voltage difference, the main control module is electrically connected with the battery module or electrically disconnected from the battery module by controlling the switch module, so that the battery module and/or the super capacitor supplies power to the motor.
In some embodiments, the processing module 902 is specifically configured to, when the voltage difference is greater than the voltage threshold, disconnect the electrical connection between the main control module and the battery module by controlling the switch module, so that the super capacitor supplies power to the motor; or when the voltage difference is smaller than or equal to the voltage threshold, the main control module is conducted to be electrically connected with the battery module through the control switch module, so that the battery module and the super capacitor supply power to the motor.
In some embodiments, a switch module comprises: a first switch tube.
In some embodiments, the switch module further comprises: the resistor, the first switch tube and the resistor are connected in series.
In some embodiments, the switch module further comprises: and the second switching tube is connected in parallel with the first switching tube after the first switching tube is connected in series with the resistor.
In some embodiments, the switch module further comprises: and the first switching tube is connected with the second switching tube in parallel and then connected with the third switching tube in series.
It can be understood that the control device of the power supply system provided in the embodiments of the present disclosure may be used in the embodiments for performing the control of the power supply system, and the implementation principle and the technical effect are similar, and are not described herein again.
Fig. 10 is a schematic structural diagram of an electric vehicle according to an embodiment of the present disclosure. As shown in fig. 10, the electric vehicle 1000 includes: a power supply system 1001, and a control device 1002 for the power supply system. The power supply system 1001 comprises a battery module, a super capacitor, a main control module and a switch module;
the control device 1002 of the power supply system may be configured to implement the steps corresponding to the control method of the power supply system in the foregoing method embodiment, and may achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are not repeated herein.
It is to be understood that the structure of the electric vehicle provided in the embodiments of the present disclosure is not limited to the electric vehicle, and may include more or less components than those shown in the drawings, or may combine some components, or may form a different component arrangement, and therefore, the description thereof is omitted.
An embodiment of the present disclosure further provides a computer-readable storage medium, where when an instruction in the storage medium is executed by a processor of a user equipment, the processor is enabled to execute the steps of the control method of the power supply system, and the same technical effects can be achieved, and details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not repeated herein.
Embodiments of the present disclosure further provide a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the control method of the power supply system are implemented, and the same technical effects can be achieved, and detailed descriptions of the same parts and beneficial effects as those of the method embodiments in this embodiment are omitted here.
The present application further provides the following embodiments:
embodiment 1, a power supply system, characterized in that, applied to an electric vehicle, the power supply system includes: the electric vehicle comprises a battery module, a super capacitor, a main control module and a switch module, wherein one terminal of the main control module is electrically connected with a motor of the electric vehicle, the other terminal of the main control module is electrically connected with the battery module through the switch module, and the super capacitor is connected with the main control module in parallel;
the switch module is used for switching on or off the electrical connection between the main control module and the battery module;
the main control module is used for controlling the switch module to disconnect the electric connection between the main control module and the battery module when the battery module is determined not to be capable of receiving the feedback current, so that the super capacitor receives the feedback current;
and the super capacitor is used for receiving the feedback current and supplying power to the motor by using the feedback current.
Embodiment 2, according to the power supply system of embodiment 1, when determining that the battery module cannot receive the feedback current, the main control module is specifically configured to:
determining that the battery module cannot receive the feedback current if at least one of the following is satisfied:
determining that a temperature of the battery module is less than a first temperature threshold;
determining that a temperature of the battery module is greater than a second temperature threshold;
determining that the remaining capacity of the battery module is greater than a remaining capacity threshold;
the first temperature threshold is the lowest charging temperature of the battery module, and the second pre-temperature threshold is the highest charging temperature of the battery module.
The power supply system of embodiment 3 and embodiment 1, wherein the main control module is further configured to, when it is determined that the battery module can receive the feedback current, turn on the electrical connection between the main control module and the battery module by controlling the switch module, so that the battery module and the super capacitor receive the feedback current.
Embodiment 4, according to the power supply system of embodiment 3, when determining that the battery module can receive the feedback current, the main control module is specifically configured to:
determining that the battery module can receive feedback current if at least one of the following conditions is met:
determining that a temperature of the battery module is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold;
determining that a remaining capacity of the battery module is less than or equal to a remaining capacity threshold;
the first temperature threshold is the lowest charging temperature of the battery module, and the second temperature threshold is the highest charging temperature of the battery module.
Embodiment 5, the power supply system according to embodiment 1, wherein the main control module is further configured to:
and when the electric vehicle is determined to be in a discharging state, controlling the battery module and/or the super capacitor to supply power to the motor.
Embodiment 6 and the power supply system according to embodiment 5, wherein the main control module, when controlling the battery module and/or the super capacitor to supply power to the motor, is specifically configured to:
determining a voltage difference between the battery module and the super capacitor;
and according to the voltage difference, the electric connection between the main control module and the battery module is controlled to be switched on or switched off by controlling the switch module, so that the battery module and/or the super capacitor supplies power to the motor.
Embodiment 7 and the power supply system according to embodiment 6, wherein the main control unit is specifically configured to, when the main control unit controls the switch module to turn on or off the electrical connection between the main control module and the battery module, so that the battery module and/or the super capacitor supplies power to the motor:
when the voltage difference is larger than a voltage threshold value, the switch module is controlled to disconnect the electric connection between the main control module and the battery module, so that the super capacitor supplies power to the motor;
or when the voltage difference is smaller than or equal to the voltage threshold, the switch module is controlled to conduct the electric connection between the main control module and the battery module, so that the battery module and the super capacitor supply power to the motor.
Embodiment 8, the power supply system according to any one of embodiments 1 to 7, wherein the switch module includes: a first switch tube.
Embodiment 9, the power supply system according to embodiment 8, wherein the switch module further includes: and the first switching tube is connected with the resistor in series.
Embodiment 10, the power supply system according to embodiment 9, wherein the switch module further includes: and the second switch tube is connected in parallel with the first switch tube after the first switch tube is connected in series with the resistor.
Embodiment 11, the power supply system according to embodiment 10, wherein the switch module further includes: and the first switching tube is connected with the second switching tube in parallel and then connected with the third switching tube in series.
Embodiment 12, a control method of a power supply system, which is applied to an electric vehicle, the power supply system including a battery module, a super capacitor, and a switch module, the control method of the power supply system including:
determining whether the battery module can receive feedback current when the electric vehicle is in an electric energy feedback state;
and if the battery module is determined not to be capable of receiving the feedback current, the super capacitor receives the feedback current by controlling the switch module to disconnect the electric connection between the main control module and the battery module, wherein the feedback current is used for supplying power to a motor of the electric vehicle.
Embodiment 13, a control device of a power supply system, characterized in that, applied to an electric vehicle, the power supply system includes a battery module, a super capacitor, and a switch module, and the control device of the power supply system includes:
the determining module is used for determining whether the battery module can receive feedback current or not when the electric vehicle is in an electric energy feedback state;
and the processing module is used for controlling the switch module to disconnect the electric connection between the main control module and the battery module when the battery module is determined not to be capable of receiving the feedback current, so that the super capacitor receives the feedback current, and the feedback current is used for supplying power to a motor of the electric vehicle.
Embodiment 14, an electric vehicle, characterized by comprising: the power supply system according to any one of embodiments 1 to 11, and the control device of the power supply system according to embodiment 13.
Embodiment 15, a computer-readable storage medium having a computer program stored thereon; the computer program, when executed, implements the control method of the power supply system according to embodiment 12.
Embodiment 16 is a computer program product including a computer program that, when executed by a processor, implements the control method of the power supply system according to embodiment 12.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (english: processor) to execute some steps of the methods according to the embodiments of the present disclosure. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other media capable of storing program codes.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. The embodiments of the disclosure are intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A power supply system applied to an electric vehicle, characterized by comprising: the electric vehicle comprises a battery module, a super capacitor, a main control module and a switch module, wherein one terminal of the main control module is electrically connected with a motor of the electric vehicle, the other terminal of the main control module is electrically connected with the battery module through the switch module, and the super capacitor is connected with the main control module in parallel;
the switch module is used for switching on or off the electrical connection between the main control module and the battery module;
the main control module is used for controlling the switch module to disconnect the electric connection between the main control module and the battery module when the battery module is determined not to be capable of receiving the feedback current, so that the super capacitor receives the feedback current;
and the super capacitor is used for receiving the feedback current and supplying power to the motor by using the feedback current.
2. The power system of claim 1, wherein the main control module is further configured to, when it is determined that the battery module can receive the feedback current, control the switch module to electrically connect the main control module and the battery module, so that the battery module and the super capacitor receive the feedback current.
3. The power system of claim 1, wherein the master control module is further configured to:
and when the electric vehicle is determined to be in a discharging state, controlling the battery module and/or the super capacitor to supply power to the motor.
4. The power supply system of claim 3, wherein the main control module, when controlling the battery module and/or the super capacitor to supply power to the motor, is specifically configured to:
determining a voltage difference between the battery module and the super capacitor;
and according to the voltage difference, the electric connection between the main control module and the battery module is controlled to be switched on or switched off by controlling the switch module, so that the battery module and/or the super capacitor supplies power to the motor.
5. The power supply system according to claim 4, wherein the main control unit is specifically configured to, when the main control module is controlled to turn on or off the electrical connection between the main control module and the battery module so that the battery module and/or the super capacitor supplies power to the motor:
when the voltage difference is larger than a voltage threshold value, the switch module is controlled to disconnect the electric connection between the main control module and the battery module, so that the super capacitor supplies power to the motor;
or when the voltage difference is smaller than or equal to the voltage threshold, the switch module is controlled to conduct the electric connection between the main control module and the battery module, so that the battery module and the super capacitor supply power to the motor.
6. The power supply system according to any one of claims 1 to 5, wherein the switch module includes: a first switch tube.
7. A control method of a power supply system is applied to an electric vehicle and is characterized in that the power supply system comprises a battery module, a super capacitor, a main control module and a switch module, and the control method of the power supply system comprises the following steps:
determining whether the battery module can receive feedback current when the electric vehicle is in an electric energy feedback state;
and if the battery module is determined not to be capable of receiving the feedback current, the super capacitor receives the feedback current by controlling the switch module to disconnect the electric connection between the main control module and the battery module, wherein the feedback current is used for supplying power to a motor of the electric vehicle.
8. The utility model provides a power supply system's controlling means, is applied to electric vehicle, its characterized in that, power supply system includes battery module, super capacitor, host system and switch module, power supply system's controlling means includes:
the determining module is used for determining whether the battery module can receive feedback current or not when the electric vehicle is in an electric energy feedback state;
and the processing module is used for controlling the switch module to disconnect the electric connection between the main control module and the battery module when the battery module is determined not to be capable of receiving the feedback current, so that the super capacitor receives the feedback current, and the feedback current is used for supplying power to a motor of the electric vehicle.
9. An electric vehicle, characterized by comprising: the power supply system according to any one of claims 1 to 5, and the control device of the power supply system according to claim 8.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program; the computer program, when executed, implements a control method of a power supply system as claimed in claim 7.
CN202110559918.XA 2021-05-21 2021-05-21 Power supply system, control method and device thereof and electric vehicle Pending CN113120139A (en)

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Application publication date: 20210716