CN117656869A - Electric automobile high-voltage system adopting standardized standby battery to enable endurance mileage to be variable - Google Patents
Electric automobile high-voltage system adopting standardized standby battery to enable endurance mileage to be variable Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application provides an electric automobile high-voltage system adopting a standardized standby battery to realize variable endurance mileage, which comprises an automobile body; the whole vehicle controller is arranged on the vehicle body; the standard distribution battery is fixedly arranged on the vehicle body; the first driving motor system is connected with the standard distribution battery at high voltage; the standby battery is detachably arranged on the vehicle body; the second driving motor system is connected with the standby battery at high voltage; the vehicle-mounted charger is respectively connected with the standard battery and the standby battery at high voltage; the whole vehicle high-voltage electrical appliance accessory is connected with the standard distribution battery at high voltage; and the standard battery, the first driving motor system, the standby battery, the second driving motor system and the whole vehicle high-voltage electric appliance accessory are all in communication connection with the whole vehicle controller. Only the standard batteries are needed to meet the daily short-distance vehicle use requirement of the vehicle owners; when a car owner needs to drive a long distance, the spare battery can be temporarily installed on the car to improve the endurance mileage, and the product practicability is very high.
Description
Technical Field
The application relates to the technical field of new energy automobiles, in particular to an electric automobile high-voltage system with a standardized standby battery and variable endurance mileage.
Background
With the development of the automobile industry, new energy automobiles become necessary choices for solving the problems of energy and emission, and as a representative of the new energy automobiles, pure electric automobiles have the characteristics of economy, cleanness and the like, are deeply favored by consumers, but are limited by specific energy of power batteries, and have lower endurance mileage, so that popularization of the pure electric automobiles is limited.
In order to better adapt to the market, the range of the electric vehicle shows a two-pole differentiation trend, one is that the range of the power battery is shorter, the electric vehicle can only meet the daily driving requirement, frequent charging is required when long-distance driving is required, and the charging time is required to be at least 30 minutes each time, so that the range defect brings great inconvenience to vehicle owners. The electric vehicle has the advantages that the longer endurance mileage is realized by adopting a larger power storage battery or range-extending scheme to be comparable with that of a fuel vehicle, but most vehicles of a vehicle owner only use short-distance vehicles such as going up and down, namely, the daily driving required mileage is shorter, the larger power storage battery or range-extending scheme causes the whole vehicle to carry excessive weight, so that the whole vehicle weight of the electric vehicle is increased, the corresponding energy consumption is increased, and the price of the electric vehicle is more expensive when in purchase. The two kinds of continuous mileage automobiles have respective defects, and cannot meet diversified requirements of owners.
Therefore, a new solution for driving mileage is needed in the electric automobile field to meet diversified demands of vehicle owners.
Disclosure of Invention
The application provides an electric automobile high-voltage system with a standardized standby battery and a variable endurance mileage, which aims to solve the technical problems of low endurance mileage and high cost of the existing electric automobile.
For solving the technical problem, the application discloses an electric automobile high-voltage system of variable continuation of journey mileage of adoption standardized standby battery, including automobile body and the whole car controller of locating on the automobile body, electric automobile high-voltage system still includes:
the standard battery is fixedly arranged on the vehicle body;
the first driving motor system is arranged on the vehicle body and is connected with the standard distribution battery at high voltage;
the standby battery is detachably arranged on the vehicle body;
the second driving motor system is arranged on the vehicle body and is connected with the standby battery at high voltage;
the vehicle-mounted charger is arranged on the vehicle body and comprises a charging interface, and the vehicle-mounted charger is respectively connected with the standard battery and the standby battery at high voltage;
the whole vehicle high-voltage electrical appliance accessory is arranged on the vehicle body and is connected with the standard distribution battery at high voltage;
and the standard battery, the first driving motor system, the standby battery, the second driving motor system and the whole vehicle high-voltage electric appliance accessory are all in communication connection with the whole vehicle controller.
In the electric automobile high-voltage system with the standardized standby battery and the variable endurance mileage, the standard distribution battery can be a power battery with common electric quantity, and is directly and fixedly arranged on the automobile body, the standard distribution battery can drive the electric automobile to run through a first driving motor system, can provide electric quantity for accessories of the whole electric automobile on the automobile, and can be charged through a vehicle-mounted charger so as to meet the daily short-distance automobile use requirement of an automobile owner; in addition, the standby battery is detachably arranged on the vehicle body, and can drive the electric vehicle to run through the second driving motor system, so that when a vehicle owner needs to drive a long distance, the standby battery can be temporarily arranged on the vehicle to improve the endurance mileage, and the standby battery can be centrally managed by a manufacturer in a leasing mode, so that the vehicle owner can only mark a distribution battery when using the vehicle in a short distance, the weight of the vehicle body can be reduced as much as possible to reduce the energy consumption, and the vehicle purchasing cost can be reduced; when the car owner has the long-distance car demand, can add and equip the battery, realize longer continuation of journey mileage through double cell and double drive motor system.
In a possible embodiment, the electric vehicle high voltage system further includes: and the input end of the energy distribution unit is connected with the standard distribution battery in a high-voltage manner, the output end of the energy distribution unit is respectively connected with the first driving motor system and the accessory of the whole vehicle high-voltage electrical appliance in a high-voltage manner, and the energy distribution unit is connected with the whole vehicle controller in a communication manner. The electric quantity of the standard battery can be better distributed to the first driving motor system and the whole vehicle high-voltage electric appliance accessory through the energy distribution unit.
In a possible embodiment, a first high-voltage contactor is arranged on a high-voltage connecting line between the vehicle-mounted charger and the standard battery; and a second high-voltage contactor is arranged on a high-voltage connecting line of the vehicle-mounted charger and the standby battery. The connection relation between the vehicle-mounted charger and the standard battery and the standby battery is controlled by the connection and disconnection of the first high-voltage contactor and the second high-voltage contactor, so that the standard battery and the standby battery are selectively charged.
In a possible embodiment, the charging interface of the vehicle-mounted charger comprises a direct current charging interface and an alternating current charging interface, wherein the direct current charging interface is connected with the first high-voltage contactor and the second high-voltage contactor at high voltage, and a diode is arranged on a high-voltage connecting line; the alternating current charging interface is connected with the first high-voltage contactor and the second high-voltage contactor at high voltage, and an alternating current-to-direct current module is arranged on the high-voltage connecting line. Through being equipped with direct current interface and the interface that charges of exchanging simultaneously, can realize matching multiple charging stake, promote car owner's user experience
In a possible embodiment, a dc rectifying and filtering module is disposed on the high-voltage connection line between the diode and the first high-voltage contactor and the high-voltage connection line between the diode and the second high-voltage contactor, and the output end of the ac-dc converting module is connected with the dc rectifying and filtering module at high voltage. And the direct current rectifying and filtering module rectifies and filters the charging current transmitted to the standard battery and the standby battery so as to protect the standard battery and the standby battery and improve the charging efficiency.
In a possible embodiment, the vehicle-mounted charger includes a control circuit, and the control circuit is respectively in communication connection with the charging interface, the first high-voltage contactor, the second high-voltage contactor, the standard battery and the standby battery. The charging state of the charging interface is monitored through the control circuit, the electric quantity and the working condition of the standard battery and the standby battery are monitored, and the connection relation between the vehicle-mounted charger and the standard battery and the standby battery is controlled through controlling the connection and disconnection of the first high-voltage contactor and the second high-voltage contactor, so that more intelligent energy distribution control is realized.
In a possible embodiment, when the charging interface is connected to an external power supply for charging, the control circuit is configured to: when the electric quantity of the standard distribution battery is detected to be less than full, the first high-voltage contactor is controlled to be conducted, the standard distribution battery is started to be charged, and when the electric quantity of the standard distribution battery is detected to be full, the first high-voltage contactor is controlled to be disconnected; and when the electric quantity of the standard battery is detected to be full and the standby battery exists and the electric quantity is not full, the first high-voltage contactor is controlled to be disconnected and the second high-voltage contactor is controlled to be connected, the standby battery is started to be charged, and when the standby battery is detected to be full, the second high-voltage contactor is controlled to be disconnected. When the charging interface is connected with an external power supply for charging, the standard power supply is preferably selected for charging, so that the standard power supply is ensured to have enough electric quantity to meet the requirements of a first driving motor system and accessories of the whole vehicle high-voltage electric appliance, and various functions of the electric vehicle are ensured to be better provided.
In a possible embodiment, when the charging interface is not connected to an external power supply for charging, the control circuit is configured to: and when detecting that the electric quantity of the standard battery and the electric quantity of the standby battery are different, controlling the first high-voltage contactor and the second high-voltage contactor to be conducted, and charging the higher electric quantity of the standard battery and the lower electric quantity of the standby battery. Through the mutual charge design of electric quantity of standard distribution battery and reserve battery, can realize when can't charge through on-vehicle machine that charges, can make full use of electric quantity distribution between two batteries guarantees better drivability and user experience of riding in the bus.
In a possible embodiment, during running of the electric automobile equipped with the electric automobile high-voltage system, the whole automobile controller controls the first driving motor system and the second driving motor system to drive the automobile body in a coupling way; the control circuit is used for: and controlling the first high-voltage contactor and the second high-voltage contactor to be conducted, and simultaneously providing working voltages for the first driving motor system and the second driving motor system by the standard battery and the standby battery. The first driving motor system and the second driving motor system are coupled to drive the electric automobile, and the standard battery and the standby battery simultaneously provide working voltage for the first driving motor system and the second driving motor system, so that better drivability and riding experience of a user of the electric automobile can be guaranteed.
In a possible embodiment, the vehicle body comprises a chassis, the battery-charging/discharging unit is fixedly arranged at the front part and/or the rear part of the chassis, and the standby battery is detachably arranged at the middle part of the chassis. The standby battery is detachably arranged in the middle of the chassis, the middle space of the chassis is large, the volume of the replaceable battery is large, higher endurance mileage can be achieved, and meanwhile, the standby battery is conveniently assembled and disassembled from the upper part or the lower part of the vehicle bottom through the middle of the chassis. In addition, the design can ensure that the strength of the side beam of the vehicle body is not weakened, and the front axle load and the rear axle load can not be changed greatly under the condition of taking and putting the standby battery, so that the posture of the whole vehicle is basically stable.
Compared with the prior art, the application has the following advantages:
when a car owner uses the car in a short distance in daily life, the power distribution battery can meet the requirement of the used electricity only by a standard power distribution battery, the weight of the car body can be reduced as much as possible to reduce the energy consumption, and the cost of purchasing the car can be reduced; when the car owner has long-distance car demands, the battery for equipment can be additionally arranged, and longer endurance mileage is realized through the double batteries and the double-driving motor system. Meanwhile, the electric automobile high-voltage system can charge the standard battery and the standby battery scientifically through the vehicle-mounted charger, and can further realize scientific distribution of electric quantity between the two batteries to ensure better drivability of the electric automobile and riding experience of a user. In addition, the standby battery is detachably arranged in the middle of the chassis, a battery pack with larger electric quantity can be arranged, the disassembly and assembly process is simple, meanwhile, the weight of the standby battery can be distributed on each wheel, and the balance of the electric automobile is not affected by whether the standby battery is arranged or not.
Drawings
FIG. 1 is a schematic diagram of an electric vehicle high voltage system employing a standardized battery backup for variable range in accordance with an embodiment of the present invention;
FIG. 2 is a schematic electrical schematic diagram of a vehicle-mounted charger according to an embodiment of the present invention;
fig. 3 is an installation schematic of a standard battery and a backup battery according to an embodiment of the present invention.
In the figure: 1-whole car controller (VCU), 2-standard Battery (Battery 1), 31-first driving Motor (Motor 1), 32-first Motor controller (MCU 1), 4-standby Battery (Battery 2), 51-second driving Motor (Motor 2), 52-second Motor controller (MCU 2), 6-novel vehicle charger (ADCS), 61-direct current charging interface (DP), 62-alternating current charging interface (AP), 63-diode (D1), 64-first high voltage contactor (K1), 65-second high voltage contactor (K2), 66-alternating current to direct current module (AC/DC), 67-direct current rectifying and filtering circuit, 68-control circuit, 7-whole car high voltage electric appliance Accessory (ACC), 8-energy distribution unit (PDU), 9-chassis.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. In the following description, such as illustrations of the arrangement of components in a complete vehicle and specific details of the components are provided merely to aid in a thorough understanding of embodiments of the present invention. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
As shown in fig. 1, an embodiment of the present invention provides an electric vehicle high voltage system with a standardized backup battery for variable endurance mileage, comprising:
the vehicle comprises a vehicle body and a vehicle controller 1 arranged on the vehicle body;
the standard battery2 is fixedly arranged on the vehicle body;
the first driving motor system is arranged on the vehicle body and is connected with the standard distribution battery2 at high voltage; the specific first driving motor system comprises a first driving motor 31 and a first motor controller 32, wherein the first motor controller 32 is connected with the target power distribution battery2 at high voltage and is used for controlling the electric quantity of the target power distribution battery2 to drive the first driving motor 31 to work so as to drive the electric automobile to run;
a spare battery 4 detachably mounted on the vehicle body;
the second driving motor system is arranged on the vehicle body and is connected with the standby battery 4 at high voltage; the specific second driving motor system comprises a second driving motor 51 and a second motor controller 52, wherein the second motor controller 52 is connected with the standby battery 4 in a high-voltage manner and is used for controlling the electric quantity of the standby battery 4 to drive the second driving motor 51 to work so as to drive the electric automobile to run;
the vehicle-mounted charger 6 is arranged on the vehicle body, the vehicle-mounted charger 6 comprises a charging interface, and the vehicle-mounted charger 6 is respectively connected with the standard battery2 and the standby battery 4 at high voltage; the vehicle-mounted charger 6 is used for charging the standard battery2 and the standby battery 4;
the whole vehicle high-voltage electrical appliance accessory 7 is arranged on the vehicle body, and the whole vehicle high-voltage electrical appliance accessory 7 is connected with the standard distribution battery2 at high voltage; the whole vehicle high-voltage electrical appliance accessory 7 comprises electrical devices requiring higher working voltage, such as a PTC heater, an air conditioner compressor, a high-voltage water pump, a DC/DC (direct current/direct current) converter and the like, and is an important component for realizing various functions of the electric vehicle;
the standard battery2, the first motor controller 32 in the first driving motor system, the standby battery 4, the second motor controller 52 in the second driving motor system and the whole vehicle high-voltage electrical appliance accessory 7 are all in communication connection with the whole vehicle controller 1.
In the electric automobile high-voltage system adopting the standardized standby battery with variable endurance mileage, the standard distribution battery2 can be a power battery with common electric quantity, the standard distribution battery2 is directly and fixedly arranged on the automobile body, the standard distribution battery2 can supply power to the first motor controller 32, the electric automobile is driven to run through the first driving motor 31, meanwhile, the electric quantity can be provided for the whole automobile high-voltage electrical appliance accessory 7 on the automobile body so as to meet various requirements of the automobile owner for daily short-distance automobile use, and the standard distribution battery2 can be charged through the vehicle-mounted charger 6 to realize normal use; in addition, through the detachable spare battery 4 installed on the car body, the spare battery 4 can supply power to the second motor controller 52, and the second driving motor 51 drives the electric car to run, so that when the car owner needs to drive long-distance car, the spare battery 4 can be temporarily installed on the car to improve the endurance mileage, and the spare battery 4 can be centrally managed by a manufacturer to adopt a renting mode, so that the car owner can only mark the battery2 when using the car in a short distance, the weight of the car body can be reduced as much as possible to reduce the energy consumption, and the car purchasing cost can be reduced; when the car owner has long-distance car demand, can add and equip with battery 4, realize longer continuation of journey mileage through double cell and double drive motor system.
In this embodiment, the electric automobile high voltage system further includes: the input end of the energy distribution unit 8 is connected with the standard distribution battery2 at high voltage, the output end of the energy distribution unit 8 is connected with the first motor controller 32 in the first driving motor system and the whole vehicle high-voltage electric appliance accessory 7 at high voltage respectively, the energy distribution unit 8 is connected with the whole vehicle controller 1 in a communication way, and the energy distribution unit 8 is controlled by the whole vehicle controller 1 to better distribute the electric quantity of the standard distribution battery2 to the first motor controller 32 and the whole vehicle high-voltage electric appliance accessory 7, so that the efficient operation of the electric vehicle is ensured.
As shown in fig. 1 and fig. 2, in this embodiment, a first high-voltage contactor 64 is disposed on a high-voltage connection line between the vehicle-mounted charger 6 and the standard battery 2; a second high-voltage contactor 65 is arranged on the high-voltage connecting line between the vehicle-mounted charger 6 and the standby battery 4. The connection relationship between the vehicle-mounted charger 6 and the standard battery2 and the standby battery 4 is controlled by the connection and disconnection of the first high-voltage contactor 64 and the second high-voltage contactor 65, so that the standard battery2 and the standby battery 4 are selectively charged. More specifically, in the present embodiment, the charging interface of the vehicle-mounted charger 6 includes a dc charging interface 61 and an ac charging interface 62, wherein the dc charging interface 61 is connected to both the first high-voltage contactor 64 and the second high-voltage contactor 65 at high voltage, and a diode 63 is provided on the high-voltage connection line; the ac charging interface 62 is connected to the first high-voltage contactor 64 and the second high-voltage contactor 65 at high voltage, and an ac-to-dc module 66 is disposed on the high-voltage connection line, where the ac-to-dc module 66 includes EMC filtering, rectifying filtering, PFC power factor correction, full-bridge conversion, and high-voltage frequency conversion that are sequentially connected, and can convert the ac input from the ac charging interface 62 into dc to charge the standard battery2 and the backup battery 4. Through being equipped with direct current interface 61 and the alternating current interface 62 that charges simultaneously, can realize matching multiple charging stake and charge for standard configuration battery2 and reserve battery 4, promote car owner's car experience. Meanwhile, in the present embodiment, a DC rectifying and filtering module 67 (i.e. the DC rectifying and filtering module in fig. 2) is disposed on the high-voltage connection line between the diode 63 and the first high-voltage contactor 64 and the second high-voltage contactor 65, and the output end of the ac-DC converting module 66 is connected with the DC rectifying and filtering module 67 at high voltage. The charging current transmitted to the standard distribution battery2 and the standby battery 4 is rectified and filtered through the direct current rectifying and filtering module 67 so as to protect the standard distribution battery2 and the standby battery 4 and simultaneously improve charging efficiency. The current electric automobile alternating current charging and direct current charging circuit are generally independent two lines, and are not influenced by each other, and the optimal design is carried out on the current vehicle-mounted charger, the direct current charging circuit is integrated into the vehicle-mounted charger 7, and the direct current charging input is further subjected to direct current rectification by utilizing the function of the direct current rectification filter circuit 67 of the vehicle-mounted charger 7 so as to adapt to the output characteristics of different direct current charging piles on the market.
As shown in fig. 2, in this embodiment, the vehicle-mounted charger includes a control circuit 68, and the control circuit 68 is communicatively connected to the dc charging interface 61, the ac charging interface 62, the first high-voltage contactor 64, the second high-voltage contactor 65, the ac-dc conversion module 66, the standard battery2, and the backup battery 4, respectively. The charging interface charging state is monitored through the control circuit 68, the electric quantity and working condition of the standard battery2 and the standby battery 4 are monitored, and the connection relation between the vehicle-mounted charger 6 and the standard battery2 and the standby battery 4 is controlled through controlling the connection and disconnection of the first high-voltage contactor 64 and the second high-voltage contactor 65, so that more intelligent control of energy distribution is realized.
Still further, in an embodiment, when the charging interface is connected to the external power source for charging, the control circuit 68 is configured to: when the electric quantity of the standard distribution battery2 is detected to be less than full, the first high-voltage contactor 64 is controlled to be conducted, the standard distribution battery2 starts to be charged, and until the electric quantity of the standard distribution battery2 is detected to be full, the first high-voltage contactor 64 is controlled to be disconnected; when the standard battery2 is detected to be full and the standby battery 4 is present and the battery is not full, the first high-voltage contactor 64 is controlled to be opened and the second high-voltage contactor 65 is controlled to be closed, and charging of the standby battery 4 is started until the standby battery 4 is detected to be full, and the second high-voltage contactor 65 is controlled to be opened. When the charging interface is connected with an external power supply for charging, the standard power supply 2 is preferably selected for charging, so that the standard power supply 2 is ensured to have enough electric quantity to meet the requirements of the first motor controller 32 and the whole vehicle high-voltage electric appliance accessory 7, and the electric vehicle is ensured to better provide various functions.
When the charging interface is not connected to the external power supply for charging, the control circuit 68 is configured to: when detecting that the electric quantity of the standard battery2 and the electric quantity of the standby battery 4 are different, the first high-voltage contactor 64 and the second high-voltage contactor 65 are controlled to be conducted, and the electric quantity of the standard battery2 and the electric quantity of the standby battery 4 are higher and the electric quantity of the standby battery 4 is lower. Through the mutual charge design of the electric quantity of the standard distribution battery2 and the electric quantity of the standby battery 4, when the electric quantity cannot be charged through the vehicle-mounted charger 6, the electric quantity distribution between the two batteries can be fully utilized to ensure better drivability of the electric automobile and riding experience of a user.
In an embodiment of the present invention, during the running process of an electric vehicle equipped with an electric vehicle high-voltage system, the whole vehicle controller 1 controls the first driving motor system and the second driving motor system to couple and drive the vehicle body; the control circuit 68 is configured to: the first high-voltage contactor 64 and the second high-voltage contactor 65 are controlled to be conducted, and the standard cell 2 and the standby battery 4 simultaneously supply operating voltages to the first driving motor system and the second driving motor system. The electric automobile is driven by the coupling of the first driving motor 31 and the second driving motor 51, and the standard battery2 and the standby battery 4 simultaneously provide working voltages for the first motor controller 32 and the first motor controller 52, so that better drivability and riding experience of a user of the electric automobile can be ensured.
In a special application, according to the control request of the vehicle controller 1, the control circuit 68 controls the first high voltage contactor 64 and the second high voltage contactor 65 to be turned on, at this time, the four-wheel drive function fully exerts the external characteristics of the first driving motor system and the second driving motor system, and the vehicle dynamics is further enhanced. When the electric quantity of the standard battery2 is insufficient, the standby battery 4 can be rently assembled, and at the moment, the first high-voltage contactor 64 and the second high-voltage contactor 65 are both conducted, the standby battery 4 automatically supplements the electric quantity for the standard battery2, and the electric automobile can realize the functions of automatic power supplement, four-wheel drive and the like.
When the vehicle only has the standard distribution battery2, the standard distribution battery2 provides electric quantity for the first motor controller 32 and the whole vehicle high-voltage electric appliance accessory 7, so that all functions required by running of the vehicle are ensured. During the sliding or braking process of the vehicle, the whole vehicle controller 1 controls the first motor controller 32 to recover part of the kinetic energy of the vehicle to charge the standard battery 2. When the vehicle has only the standard Battery2, the power required for driving the vehicle is p1=fun (p_battery 1, p_motor1, p_driver), and P1 is related to the maximum charge/discharge power p_battery1 that can be provided by the standard Battery2, the maximum power p_motor1 that can be provided by the first Motor controller 32, and the driver demand power p_driver.
When the vehicle is equipped with the standard battery2 and the backup battery 4, the standard battery2 supplies the first motor controller 32 and the whole vehicle high-voltage electric appliance accessory 7 with energy, and the backup battery 4 supplies the second motor controller 52 with required energy. At this time, according to different driving conditions, the vehicle can realize two-wheel drive or four-wheel drive functions. Two drives: when the electric quantity of the standard battery2 is high, the power driving system for vehicle driving is the standard battery2 and the first motor controller 32, and the power required for vehicle driving is P1. During the sliding or braking process of the vehicle, the whole vehicle controller 1 controls the first motor controller 32 to recover part of kinetic energy of the vehicle to charge the standard battery 2; when the electric quantity of the standard Battery2 is low, the power driving system for driving the vehicle is the backup Battery 4 and the second Motor controller 52, and the power required for driving the vehicle is p2=fun (p_battery 2, p_motor2, p_driver), where P2 is related to the maximum charge/discharge power p_battery2 that can be provided by the backup Battery 4, the maximum power p_motor2 that can be provided by the second Motor controller 52, and the driver required power p_driver. During the vehicle coasting or braking process, the vehicle controller 1 controls the second motor controller 52 to recover part of the kinetic energy of the vehicle to charge the standby battery 4. Four-wheel drive: the power driving system for driving the vehicle is the standard battery2, the first motor controller 32, the standby battery 4 and the second motor controller 52, and the driving power of the vehicle is P1+P2. During the sliding or braking process of the vehicle, the whole vehicle controller 1 controls the first motor controller 32 to recover part of the kinetic energy of the vehicle to charge the standard battery2, or controls the second motor controller 52 to recover part of the kinetic energy of the vehicle to charge the standby battery 4, or controls the first motor controller 32 and the second motor controller 52 to recover part of the kinetic energy of the vehicle to charge the standard battery2 and the standby battery 4 respectively. When the standby battery 4 and the standard battery2 work simultaneously, the vehicle can not only realize the four-wheel drive function, obtain stronger acceleration performance and recover more energy, but also realize longer endurance mileage through the standby battery 4 and more recovered energy.
The vehicle controller 1 receives the state information of all the vehicle high-voltage electric appliances 7 through the communication line, calculates the power P1 and P2 required by the vehicle driving according to the state of each vehicle high-voltage electric appliance accessory 7 and the driving input information of the driver, and sends control instructions to the first motor controller 32 and the second motor controller 52 in real time through the communication line to ensure the vehicle driving.
In this embodiment, as shown in fig. 3, the vehicle body comprises a chassis 9, the battery cell 2 is fixedly mounted on the front and rear of the chassis 9, and the spare battery 4 is detachably mounted on the middle of the chassis 9. The standby battery 4 is detachably arranged in the middle of the chassis 9, the middle space of the chassis 9 is large, the volume of the replaceable battery is large, and the higher endurance mileage can be achieved, meanwhile, the standby battery 4 is conveniently assembled and disassembled from the upper side or the lower side of the vehicle bottom by the middle-mounted standby battery 4 of the chassis 9. In addition, the weight of the backup battery 4 can be distributed to each wheel, and the balance of the electric vehicle is not affected by whether the backup battery 4 is mounted or not. The standard battery2 and the standby battery 4 are arranged below the chassis 9 of the vehicle to be integrated with the chassis, the standard battery2 is composed of two power batteries, the standard battery2 and the standby battery 4 are respectively arranged in the chassis 9 below the front row seat of the vehicle and the chassis 9 below the rear row seat, the layout is ingenious and reasonable, and the front and rear axle loads of the vehicle can be distributed uniformly under the condition that the standard battery2 or the standard battery2 and the standby battery 4 are arranged through the standard battery2 and the standby battery 4. In another embodiment, the standard cell 2 may also be fixedly mounted to the front or rear of the chassis 9, the mounting location of which may be differently designed in connection with the chassis arrangement.
In the above embodiment, the high-voltage connection refers to connection through a high-voltage electric wire to meet the electricity demand of charging or an electric device; the communication connection means connection through common wires or Bluetooth or WIFI or infrared induction and the like, and mainly realizes monitoring and control of the working states of all electric devices and high-efficiency intelligent operation of the whole electric automobile high-voltage system.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict. While preferred embodiments of the present embodiments have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the present application.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.
The above description is made in detail of an electric vehicle high voltage system with a standardized standby battery and a variable endurance mileage, and specific examples are applied to illustrate the principles and embodiments of the present application, and the above description of the examples is only used to help understand the method and core idea of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (10)
1. The utility model provides an adopt variable continuation of journey mileage's of standardized reserve battery electric automobile high-voltage system, includes the automobile body and locates the whole car controller on the automobile body, its characterized in that, electric automobile high-voltage system still includes:
the standard battery is fixedly arranged on the vehicle body;
the first driving motor system is arranged on the vehicle body and is connected with the standard distribution battery at high voltage;
the standby battery is detachably arranged on the vehicle body;
the second driving motor system is arranged on the vehicle body and is connected with the standby battery at high voltage;
the vehicle-mounted charger is arranged on the vehicle body and comprises a charging interface, and the vehicle-mounted charger is respectively connected with the standard battery and the standby battery at high voltage;
the whole vehicle high-voltage electrical appliance accessory is arranged on the vehicle body and is connected with the standard distribution battery at high voltage;
and the standard battery, the first driving motor system, the standby battery, the second driving motor system and the whole vehicle high-voltage electric appliance accessory are all in communication connection with the whole vehicle controller.
2. The electric vehicle high-voltage system employing a standardized battery backup of variable range of claim 1, further comprising:
and the input end of the energy distribution unit is connected with the standard distribution battery in a high-voltage manner, the output end of the energy distribution unit is respectively connected with the first driving motor system and the accessory of the whole vehicle high-voltage electrical appliance in a high-voltage manner, and the energy distribution unit is connected with the whole vehicle controller in a communication manner.
3. The high-voltage system of the electric automobile adopting the standardized standby battery for variable endurance mileage according to claim 1, wherein a first high-voltage contactor is arranged on a high-voltage connecting line of the vehicle-mounted charger and the standard battery; and a second high-voltage contactor is arranged on a high-voltage connecting line of the vehicle-mounted charger and the standby battery.
4. The electric vehicle high-voltage system employing a standardized battery backup with variable endurance according to claim 3, wherein the charging interface of the vehicle-mounted charger comprises a direct current charging interface and an alternating current charging interface, wherein,
the direct current charging interface is connected with the first high-voltage contactor and the second high-voltage contactor at high voltage, and a diode is arranged on a high-voltage connecting line;
the alternating current charging interface is connected with the first high-voltage contactor and the second high-voltage contactor at high voltage, and an alternating current-to-direct current module is arranged on the high-voltage connecting line.
5. The high-voltage system of the electric automobile adopting the standardized standby battery for variable endurance mileage according to claim 4, wherein a direct current rectifying and filtering module is arranged on a high-voltage connecting line of the diode and the first high-voltage contactor and the second high-voltage contactor, and an output end of the alternating current-to-direct current module is connected with the direct current rectifying and filtering module in a high voltage mode.
6. The electric vehicle high-voltage system employing a standardized battery backup for variable range of claim 3, wherein the vehicle-mounted charger comprises a control circuit communicatively connected to the charging interface, the first high-voltage contactor, the second high-voltage contactor, the standard battery, and the battery backup, respectively.
7. The electric vehicle high voltage system of claim 6, wherein when the charging interface is connected to an external power supply for charging, the control circuit is configured to:
when the electric quantity of the standard distribution battery is detected to be less than full, the first high-voltage contactor is controlled to be conducted, the standard distribution battery is started to be charged, and when the electric quantity of the standard distribution battery is detected to be full, the first high-voltage contactor is controlled to be disconnected;
and when the electric quantity of the standard battery is detected to be full and the standby battery exists and the electric quantity is not full, the first high-voltage contactor is controlled to be disconnected and the second high-voltage contactor is controlled to be connected, the standby battery is started to be charged, and when the standby battery is detected to be full, the second high-voltage contactor is controlled to be disconnected.
8. The electric vehicle high voltage system of claim 6, wherein when the charging interface is not connected to an external power supply for charging, the control circuit is configured to:
and when detecting that the electric quantity of the standard battery and the electric quantity of the standby battery are different, controlling the first high-voltage contactor and the second high-voltage contactor to be conducted, and charging the higher electric quantity of the standard battery and the lower electric quantity of the standby battery.
9. The electric vehicle high-voltage system adopting the standardized standby battery for variable endurance according to claim 6, wherein the vehicle controller controls the first driving motor system and the second driving motor system to couple and drive the vehicle body during driving of the electric vehicle equipped with the electric vehicle high-voltage system; the control circuit is used for:
and controlling the first high-voltage contactor and the second high-voltage contactor to be conducted, and simultaneously providing working voltages for the first driving motor system and the second driving motor system by the standard battery and the standby battery.
10. The electric vehicle high voltage system of any of claims 1-9, wherein the vehicle body includes a chassis, the battery module is fixedly mounted on a front and/or rear portion of the chassis, and the battery module is removably mounted in a middle portion of the chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211015266.4A CN117656869A (en) | 2022-08-23 | 2022-08-23 | Electric automobile high-voltage system adopting standardized standby battery to enable endurance mileage to be variable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211015266.4A CN117656869A (en) | 2022-08-23 | 2022-08-23 | Electric automobile high-voltage system adopting standardized standby battery to enable endurance mileage to be variable |
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| Publication Number | Publication Date |
|---|---|
| CN117656869A true CN117656869A (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211015266.4A Pending CN117656869A (en) | 2022-08-23 | 2022-08-23 | Electric automobile high-voltage system adopting standardized standby battery to enable endurance mileage to be variable |
Country Status (1)
| Country | Link |
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| CN (1) | CN117656869A (en) |
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2022
- 2022-08-23 CN CN202211015266.4A patent/CN117656869A/en active Pending
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