CN208835220U

CN208835220U - A kind of extended-range battery system

Info

Publication number: CN208835220U
Application number: CN201821461288.2U
Authority: CN
Inventors: 田秀君; 谢枫; 向建明
Original assignee: WM Smart Mobility Shanghai Co Ltd
Current assignee: WM Smart Mobility Shanghai Co Ltd
Priority date: 2018-09-07
Filing date: 2018-09-07
Publication date: 2019-05-07
Anticipated expiration: 2028-09-07

Abstract

The utility model provides a kind of extended-range battery system, is used for electric car, and extended-range battery system includes: main battery, is installed on electric car for providing energy for electric car；Increase journey battery module, increases journey battery module and be replaceably mounted in electric car；DC boosting module, DC boosting module are connected to main battery, and the increasing journey battery module being installed on electric car is main battery charging via DC boosting module；Wherein, each increases journey battery module equipped with BMS module, and it is main battery charging that at least one being installed on electric car, which increases the charging signals that journey battery module is exported in response to corresponding BMS module,.By extended-range battery system provided by the utility model, the battery capacity for being fixedly installed in the main battery of vehicle can be reduced to mitigate the weight bearing of vehicle, but battery capacity can be made neatly to meet the needs of different course continuation mileages again simultaneously.

Description

Range-extending type battery system

Technical Field

The utility model relates to a battery field especially relates to a battery field for car.

Background

With the increasing shortage of fossil fuels, new energy automobiles are receiving much attention from the world. However, the new energy pure electric vehicle has many problems at the present stage, which restrict the market of the pure electric vehicle to be rapidly spread. The main factors of the method are as follows: 1. the problem of difficult charging; 2. the problem of short endurance; 3. the service life of the battery is short; 4. battery safety issues; 5. the battery economy is a problem.

The new forms of energy pure electric vehicles at present adopts the design of integration battery mostly, is about to monoblock battery design on the car, forms unified whole with the car, and this type of battery has following characteristics, and the battery is whole bulky, heavy, with high costs, and difficult the change battery because extreme service environment leads to battery cycle life bottom, and the security is enough and worried. The lithium ion power battery integrated with the automobile can only supplement energy for huge batteries in a quick charging mode, and is caused by the shortage of charging pile resources at the present stage, so that the popularization of the automobile in a user terminal is restricted. The method specifically comprises the following points:

1. the rapid charging can cause the temperature rise of the battery to be too fast and difficult to control, further the service life of the battery is influenced, and meanwhile, potential safety hazards can be brought. The rapid charging pile is a system project for laying a large area, cannot be used for kicking on at once, needs to be gradually improved, and needs to be on a fashionable day. And relatively tense charging resources in a short period of time tend to restrict the popularization of the pure electric vehicle.

2. At present, most passenger vehicles have endurance of about 300 kilometers, and few high-end vehicle types are provided with higher endurance mileage, such as 450 kilometers and 600 kilometers. However, the vehicle model equipped with the battery with higher capacity tends to increase the total weight of the whole vehicle, and the increased weight of the battery tends to bring higher energy consumption, so that the economical efficiency of increasing the capacity of the battery is not strong, and the increased capacity of the battery is more consumed to the weight increment of the whole vehicle.

3. Each whole vehicle manufacturer pursues high capacity once, and tends to utilize the battery capacity to the utmost extent, namely the cyclic capacity utilization of nearly 100% DOD, so that the battery is used in an extreme environment, the cycle life of the battery is greatly shortened, and meanwhile, great hidden danger is brought to the safety of the battery.

4. The safety of the battery is a comprehensive problem, and is mostly reflected by extreme use environments and unjusted potential of squeezing the battery, and the root-pursuit and uncovering are the comprehensive reflection of the problems. Therefore, at present, the safety problem of the battery is mainly focused on the problem of rationalizing the application of the battery.

5. The battery capacity of the whole vehicle is excessively allocated, the cost of the whole vehicle is increased, the battery occupies nearly half of the cost of the whole vehicle, however, 80% of the time of most terminal users only needs to be continued by less than 20% of the time allocated by the vehicle, and great waste is caused.

Therefore, there is a need for a new battery system that can change the way that the current integrated battery is used for high capacity at a time, reduce the battery capacity of the main battery fixedly mounted on the vehicle to reduce the load of the vehicle, and at the same time, can flexibly meet the requirements of different endurance mileage.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

As described above, in order to reduce the battery capacity of the main battery of fixed mounting in the vehicle in order to alleviate the heavy burden of vehicle, nevertheless can make battery capacity satisfy the demand of different continuation of the journey mileage in a flexible way again simultaneously, the utility model provides an extend range formula battery system for electric automobile includes: a main battery mounted to the electric vehicle to supply energy to the electric vehicle; a range-extending battery module replaceably mounted to the electric vehicle; a dc boost module connected to the main battery, the range-extended battery module mounted on the electric vehicle charging the main battery via the dc boost module; each of the extended-range battery modules is provided with a BMS module, and at least one extended-range battery module mounted on the electric vehicle charges the main battery in response to a charging signal output from the corresponding BMS module.

The range-extended battery module which can be flexibly installed on the vehicle is arranged to charge the main battery, so that the capacity of the main battery integrally arranged on the vehicle can be effectively reduced, the weight of the main battery is reduced, the dead weight of the vehicle is reduced, and the energy consumption is saved. In addition, the main battery is charged by the range-extended battery module, so that the battery capacity of the main battery can be continuously supplemented, and the requirements of different driving mileage can be flexibly met. The utility model provides a although the electric quantity that increases journey battery module finally turns into the energy that the vehicle travel, nevertheless increase journey battery module and step up the module through the direct current and connect in the main battery, and non-lug connection can the use of optimal control battery in driving motor. And each extended-range battery module is internally provided with a BMS module, so that the BMS module does not interfere with the control of the whole vehicle.

In the above extended range battery system, optionally, each extended range battery module is provided with a relay between the extended range battery module and the dc boost module, and the relay of the at least one extended range battery module connects the extended range battery module to the dc boost module in response to a charging signal output by the corresponding BMS module to charge the main battery. In the scheme, the output of each range-extended battery module is realized through the relay, the hardware structure is simple, and the stability is high.

Optionally, the vehicle control unit is disposed in the electric vehicle, the BMS module of the range-extended battery module mounted on the electric vehicle is connected to the vehicle control unit, and the charging signal output by the BMS module corresponding to the at least one range-extended battery module is received from the vehicle control unit. In the scheme, the BMS module and the vehicle control unit are respectively arranged in the extended-range battery module, so that the use of the battery is favorably optimized and controlled.

In the extended range battery system, optionally, the corresponding BMS module of the at least one extended range battery module receives the charging signal from the vehicle controller in response to the electric quantity information of the main battery being less than a preset threshold. In the scheme, the uninterrupted power supply to the main battery can be started only when the SOC of the integrally arranged main battery is reduced to a certain limit value, so that the service efficiency and the service life of the main battery can be effectively improved.

In the extended range battery system, optionally, a plurality of extended range battery modules are mounted on the electric vehicle, and the corresponding BMS module of each extended range battery module receives the charging signal from the vehicle control unit in response to the electric quantity information of the main battery being less than a preset threshold. In the scheme, under the condition that the running state and the SOC of the main battery are required, the effect of rapidly supplementing the electric quantity of the main battery is achieved by the mode that the multiple extended-range battery modules supply power to the main battery at the same time, and the service efficiency and the service life of the main battery can be effectively improved.

Optionally, the extended range battery system is configured to further include a plurality of extended range battery modules, and a BMS module corresponding to the extended range battery module with the minimum information on the electric quantity of the extended range battery module in the plurality of extended range battery modules receives the charging signal from the vehicle controller in response to the electric quantity information of the main battery being smaller than a preset threshold. In the scheme, under the condition that the running state and the SOC of the main battery are required, the effect of supplementing the electric quantity of the main battery is achieved by selecting a mode of supplying power by the extended-range battery module independently from the main battery, and the service efficiency and the service life of the main battery can be effectively improved. Moreover, considering the detachability of the range-extending battery module, the range-extending battery module with the minimum electric quantity is preferentially selected to independently supply power for the main battery.

In the above extended range battery system, optionally, each of the extended range battery modules has the same output interface, so that the plurality of extended range battery modules and the dc boost module or the main battery can transmit and receive signals through the same communication protocol. In the above scheme, by setting the same output interface, the extended range battery system has expandability and compatibility, and can realize relatively quick and convenient replacement operation.

As in the above extended range battery system, optionally, each of the extended range battery modules has the same external dimensions. In the above scheme, the extended range battery system has expandability and compatibility by setting the same output interface.

Through the utility model provides an increase form battery system can reduce the battery capacity of fixed mounting in the main battery of vehicle in order to alleviate the heavy burden of vehicle, but can make battery capacity satisfy the demand of different continuation of the journey mileage in a flexible way simultaneously again.

Drawings

Fig. 1 is a schematic view of an extended range battery system according to an embodiment of the present invention;

fig. 2 is a schematic view of an extended range battery system according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an extended range battery system according to an embodiment of the present invention.

Reference numerals:

11 is a main battery; 12 is an extended range battery module; 13 is a direct current boost module; 14 is a BMS module; 15 is a range-extended battery; 16 is a relay;

21 is a main battery; 22 is an extended range battery module; 23 is a direct current boost module; 24 is a BMS module; 25 is a range-extended battery; 26 is a relay; 27 is a whole vehicle controller; 28 is a vehicle high-voltage controller;

31 is a main battery; 321-323 are extended range battery modules; 33 is a direct current boost module; 341-343 is a BMS module; 351-353 are range-extending batteries; 361-363 is a relay; 37 is a whole vehicle controller; 38 is a vehicle high-voltage controller;

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be understood as imposing any limitation on the scope of the present invention.

As shown in fig. 1, in order to change the way that the present integrated battery pursues high capacity at a glance, reduce the battery capacity of fixedly mounted in the main battery of vehicle in order to lighten the heavy burden of vehicle, but can make the battery capacity satisfy the demand of different continuation of the journey mileage in a flexible way again simultaneously, the utility model provides an embodiment of a range extending battery system for electric automobile, this system includes:

a main battery 11 mounted on the electric vehicle for supplying power to the electric vehicle;

an extended-range battery module 12 replaceably mounted on the electric vehicle, for charging the main battery 11;

a dc boost module 13 connected to the main battery 11, and a range-extended battery module 12 mounted on the electric vehicle charging the main battery 11 via the dc boost module 13;

the extended range battery module 12 is provided with a BMS module 14, and at least one extended range battery module 12 mounted on the electric vehicle charges the main battery 11 in response to a charging signal of the corresponding BMS module output 14.

It is understood that the electric vehicle mentioned in the embodiment refers to a vehicle with an electric energy driving function, and is not limited to a vehicle driven by pure electric energy, but may also include a vehicle driven by hybrid energy; the electric automobile is not limited by the purposes of passenger carrying, cargo carrying and the like, and other special vehicles with special purposes are not excluded.

In this embodiment, the main battery 11 is integrated with the electric vehicle, and common vehicle-mounted storage batteries such as common lithium batteries and lead-acid batteries can be used, so that the battery capacity is not excessively large, and the daily driving requirements of most electric vehicles, such as a cruising range of about 300 km; in other embodiments, the electric vehicle may also use other types of batteries such as fuel cells, and the electric vehicle may be equipped with electric power suitable for the driving range according to the load and daily use of the electric vehicle.

In the above embodiment, by providing at least one range-extended battery module 12 that can be flexibly mounted on the vehicle to charge the main battery 11, the capacity of the main battery 11 integrally mounted on the vehicle can be effectively reduced, and the weight of the main battery 11 is reduced, thereby reducing the self weight of the vehicle and saving energy. The at least one range-extended battery module 12 means that at least one range-extended battery module 12 mounted on the vehicle is required to charge the main battery 11 during range-extended charging; when the extended-range charging is not needed, the extended-range charging module 12 may not be installed on the electric vehicle.

In the embodiment shown in fig. 1, an extended range battery module 12 flexibly mounted on a vehicle is provided to charge the main battery 11, and the electric quantity of the main battery 11 can be continuously supplemented in the driving process by continuously replacing the extended range battery module 12 to charge the main battery 11, so that the requirements of different driving mileage are flexibly met, and the defects of low coverage rate of a charging pile and long charging process of an electric vehicle are overcome.

Those skilled in the art should know, the utility model provides a system can also set up a plurality of journey battery module 12 and replenish the electric quantity for main battery 11 according to the needs of different mileage of traveling to can set for this a plurality of journey battery module 12 of increasing to charge for main battery 11 in turn as required, or set up a plurality of journey battery module 12 of increasing and charge for main battery 11 simultaneously, not only can play the effect of replenishing the electric quantity for main battery 11, can also avoid frequently changing the trouble of journey battery module 12 of increasing, and can accelerate charge rate.

In this embodiment, the capacity of the main battery 11 integrally mounted on the vehicle can be effectively reduced by providing the range-extending battery module 12 that can be flexibly mounted on the vehicle to charge the main battery 11, and the weight of the main battery 11 is reduced, thereby reducing the self weight of the vehicle and saving energy. In addition, the mode of continuously replacing the range-extended battery module 12 to charge the main battery 11 can continuously supplement the battery electric quantity of the main battery 11 in the driving process, so that the battery electric quantity can flexibly meet the requirements of different driving mileage, and the defects of low coverage rate of a charging pile and long charging process of the electric automobile are overcome. In other embodiments, a plurality of range-extending battery modules 12 may be arranged to charge the main battery 11 in turn, so as to avoid the trouble of frequently replacing the range-extending battery modules 12; or a plurality of range-extended battery modules 12 are arranged to charge the main battery 11 at the same time, so that the technical effect of accelerating the charging speed is achieved.

In this embodiment, one end of the dc boost module 13 is connected to the main battery 11, and the other end is detachably connected to the range-extended battery module 12. The dc boost module 13 has a function of converting different low-voltage dc voltages output by different range-extending battery modules 12 into high-voltage dc voltages not less than the potential of the main battery 11, so that the range-extending battery system can charge the main battery 11 using different range-extending battery modules 12 with different potentials, and can fully use the residual electric quantity in the range-extending battery module 12, and continue to charge the main battery 11 under the condition that the range-extending battery module 12 is at a low voltage, thereby improving the charging efficiency of the range-extending battery module 12. In addition, the dc boost module 13 also has a potential isolation function, and can perform an overvoltage protection function on the main battery 11 with a high production cost. In other embodiments, based on the same principle, the dc boost module 13 may also have a dc voltage reduction function, so as to charge the main battery 11 using the high-voltage, large-capacity range-extended battery module 12.

In this embodiment, each extended-range battery module 12 is provided with a BMS (battery management system) module 14, and the BMS module 14 can send a charging signal to control the extended-range battery 15 to charge the main battery 11 when the main battery 11 needs to be charged by receiving a trigger signal, so as to avoid safety hazards such as overheating or heat generation caused by repeated charging of the main battery 11 in a high-power condition. The BMS module 14 may further acquire an electric quantity of the corresponding extended range battery 15, and control the extended range battery 15 to start/stop supplying the electric quantity from the external power source through the charging port by determining whether the corresponding extended range battery 15 needs to be charged.

It should be noted that in the extended range battery system provided in the present embodiment, although the electric energy in the extended range battery module 12 is finally converted into the energy for the vehicle to run, the extended range battery module 12 is connected to the main battery 11 through the dc boost module 13, and is used for charging the main battery 11, rather than being directly connected to the driving motor of the electric vehicle. As can be seen from the foregoing description, this connection method can improve the application range and the utilization rate of the extended-range battery module 12; and each range-extending battery module 12 is internally provided with a BMS module 14 structure, so that the range-extending battery module 12 can be automatically controlled to charge the main battery 11 without interfering with the control of the whole vehicle.

Preferably, in the extended range battery system provided in a preferred aspect of the present embodiment, each extended range battery module 12 is further provided with a relay 16 between the extended range battery 15 and the dc boost module 13. When the main battery 11 is charged below a certain threshold, the relay 16 of at least one extended range battery module 12 communicates the extended range battery module 12 to the dc boost module 13 to charge the main battery 11 in response to the charging signal output from the corresponding BMS module 14.

It can be understood that, in the above preferred embodiment, the structure that the relay 16 controls whether the range-extended battery module 12 charges the main battery 11 has the characteristics of simple hardware structure and high stability; the arrangement of the BMS module 14 and the relay 16 in each of the extended range battery modules 12 facilitates modular independent control of the extended range battery modules 12 and facilitates replacement, maintenance and debugging.

Based on the same concept, in the extended range battery system of other embodiments, other control switches may also be used to achieve the technical effect of controlling whether the extended range battery module charges the main battery. Based on the above description, it can be found that the control switch, which is exemplified by the relay, can play a role of controlling whether the range-extended battery module charges the main battery as long as the control switch is arranged between the range-extended battery and the main battery, and is not necessarily arranged between the range-extended battery and the dc boost module. Under the condition that control parameters such as voltage, power and the like allow, a control switch taking a relay as an example is not necessarily in one-to-one relationship with the range-extended battery modules, and one control switch can be adopted to respond to a charging signal output by a corresponding BMS module and connect a plurality of range-extended battery modules to a main battery for charging so as to accelerate the charging process of the main battery; or the control switches respond to the charging signals output by the corresponding BMS modules and connect one range-extended battery module to the main battery for charging, so that the range-extended battery system can control whether the range-extended battery module charges the main battery according to various conditions.

Optionally, in another preferred embodiment of the present invention, a vehicle Control unit vcu (vehicle Control unit)27 is further provided in the electric vehicle, the BMS module 24 of the extended range battery module 22 mounted on the electric vehicle is connected to the vehicle Control unit 27, and the charging signal output by the corresponding BMS module 24 of at least one extended range battery module 22 is received from the vehicle Control unit 27.

In the above preferred embodiment, each extended-range battery module 22 is internally provided with a BMS module 24, and the BMS module 24 is connected with the vehicle control unit 27, so as to facilitate the optimization of the control and use of the battery. In order to eliminate the heating phenomenon caused by repeated charging, reduce the energy loss of repeated charging and improve the working efficiency of the main battery 21, the vehicle control unit 27 acquires the remaining electric quantity soc (state of charge) of the main battery 21 and the real-time energy consumption of the electric vehicle in real time; according to the working efficiency of the main battery 21 under different electric quantities, when the remaining electric quantity SOC of the main battery 21 is lower than a preset threshold, the vehicle control unit 27 sends a signal for charging the main battery 21 to one or more BMS modules 24 in the extended range battery system, so that the remaining electric quantity SOC of the main battery 21 is constantly kept in an optimal working range; in response to the signal for charging the main battery 21, the BMS module 24 receiving the signal outputs a signal to its corresponding relay 26, which controls the relay 26 to communicate the range-extended battery module 22 to the dc boost module 23 to charge the main battery 21.

Fig. 2 shows a schematic structural diagram of an embodiment of the above preferred embodiment, and as shown in fig. 2, the utility model provides an extended range battery system is provided with one of the above extended range battery modules 22, and the BMS module 24 of the extended range battery module 22 is connected with the vehicle control unit 27, and the charging signal output by the BMS module 24 is received from the vehicle control unit 27. In order to eliminate the heating phenomenon caused by repeated charging, reduce the energy loss of repeated charging and improve the working efficiency of the main battery 21, the vehicle control unit 27 acquires the remaining electric quantity soc (state of charge) of the main battery 21 and the real-time energy consumption of the electric vehicle in real time; according to the working efficiency of the main battery 21 under different electric quantities, when the remaining electric quantity SOC of the main battery 21 is lower than a preset threshold, the vehicle control unit 27 sends a signal for charging the main battery 21 to the BMS module 24, so that the remaining electric quantity SOC of the main battery 21 is constantly kept in an optimal working range; in response to the signal to charge the main battery 21, the BMS module 24 outputs a signal to its corresponding relay 26, which controls the relay 26 to communicate the range-extended battery module 22 to the dc boost module 23 to charge the main battery 21.

Fig. 3 shows a schematic structural diagram of another embodiment of the above preferred embodiment, as shown in fig. 3, the extended range battery system provided by the present invention is provided with a plurality of the extended range battery modules 321 and 323, and the corresponding BMS module 341 and 343 of each extended range battery module 321 and 323 are connected to the vehicle controller 37, and can receive the charging signal from the vehicle controller 37 in response to the remaining power information SOC of the main battery 31 being less than the preset threshold. It should be understood by those skilled in the art that although fig. 3 shows three extended-range battery modules, the above illustration is merely an example, and the above-mentioned plurality of extended-range battery modules may be two or more. Through the mode that sets up a plurality of range battery module that increase, can make electric automobile satisfy the needs of higher continuation of the journey mileage.

Further, in the embodiment where the extended range battery system is provided with a plurality of extended range battery modules, the corresponding BMS module 341 and 343 of the plurality of extended range battery modules 321 and 323 receive the charging signal from the vehicle controller 37 in response to the remaining power information SOC of the main battery 31 being less than the predetermined threshold.

Based on the situation that the charging power of one range-extended battery module 351 to the main battery 31 is smaller than the real-time energy consumption of the electric automobile, and is not enough to keep the remaining capacity SOC of the main battery 31 in the optimal working range at any moment, or is not enough to raise the remaining capacity SOC of the main battery 31 to be larger than the preset threshold range, the vehicle control unit 37 in the range-extended battery system can simultaneously send a signal for charging the main battery 31 to the corresponding BMS module 341 and 343 in the plurality of range-extended battery modules 321 and 323; the BMS module 341 and 343 receiving the signal respond to the signal to control the corresponding multiple range-extended battery modules 321 and 323 to supply power to the main battery 31, so as to achieve the effect of rapidly supplementing the electric quantity of the main battery 31, keep the electric vehicle capable of continuously operating, and effectively improve the service efficiency and service life of the main battery 31.

It is understood that, in other embodiments of the foregoing solution, the vehicle control unit may send a signal to charge the main battery to some of the extended-range battery modules, and not necessarily all of the extended-range battery modules are driven. The vehicle control unit sends a signal for charging the main battery to the multiple extended-range battery modules at the same time, and the signal is not limited to the same time; the technical scheme that the vehicle control unit sequentially sends out signals for charging the main battery to the multiple extended-range battery modules according to the actual condition of the residual electric quantity SOC in the main battery can also be included.

Further, in the embodiment where the extended range battery system is provided with a plurality of extended range battery modules, only the corresponding BMS module 341 of the extended range battery module 321 with the smallest electric quantity among the plurality of extended range battery modules 321 and 323 receives the charging signal from the vehicle controller 37 in response to the electric quantity information of the main battery 31 being less than the preset threshold.

In consideration of the detachability of the range-extending battery modules 321 and 323, the vehicle controller 37 of the electric vehicle may further obtain the remaining power information in the range-extending battery modules 321 and 323 in real time; under the condition that the remaining power SOC of the main battery 31 is lower than the preset threshold, the vehicle control unit 37 may send a signal for charging the main battery 31 to the BMS module 341 corresponding to the range-extended battery module 321 with the minimum remaining power according to the acquired remaining power information in the plurality of range-extended battery modules 321 and 323; the range-extended battery module 321 with the minimum remaining power is preferentially selected to independently supply power to the main battery 31, and the remaining power in the range-extended battery module is used up as soon as possible, so that the technical effect of replacing the range-extended battery module or reducing the weight of the electric automobile is achieved.

Optionally, the utility model provides an increase journey battery system in each and increase journey battery module can also have the same output interface to make between a plurality of journey battery module and the direct current boost module or the main battery through the same communication protocol send-receive signal.

The BMS module of the range-extended battery module can be directly communicated with the VCU of the vehicle control unit by adopting the same output interface of the range-extended battery module, the same communication interface of the BMS module and a standard communication protocol, and the VCU of the vehicle control unit outputs a control instruction to the range-extended battery module; the BMS module of the extended-range battery module can also complete the control work of the extended-range battery module through the signal output by the VCU of the vehicle control unit. Therefore, the same extended-range battery module output interface, the same BMS module communication interface and the standard communication protocol are adopted, so that the extended-range battery system has expandability and compatibility, and can realize quick and convenient replacement operation.

Optionally, in the extended range battery system provided by the present invention, each extended range battery module may also have the same external dimensions.

The range-extending battery module is detachably mounted on the electric automobile, and a specific mounting position can be arranged on the electric automobile according to the appearance shape of the range-extending battery module. Through all setting each increase journey battery module to same overall dimension, can all set it to the design of inserting soon, realize that non professional also can change the technological effect of increasing journey battery module in a flexible way.

Based on the above description, it can be found that the present embodiment has the following beneficial effects:

1. the range of the pure electric new energy automobile is increased, the bound restriction of the cruising mileage of the pure electric new energy automobile is broken, and the unlimited cruising mode of the pure electric new energy automobile is started;

2. the service environment and conditions of the vehicle-mounted battery are effectively optimized, and the service life and the service safety of the vehicle-mounted battery are greatly prolonged;

3. the cost of purchasing the whole vehicle by a user is reduced, and the market promotion competitiveness of the pure electric new energy vehicle is improved;

4. the dependence on the quick charging pile is eliminated, another electric energy supplementing mode is created, and a new operation mode is added.

It can be understood based on the above description, through the utility model provides an increase form battery system can reduce the battery capacity of fixed mounting in electric automobile's main battery in order to alleviate the heavy burden of vehicle, but can make battery capacity satisfy the demand of different continuation of the journey mileage in a flexible way simultaneously again.

Those of skill in the art would understand that information, signals, and data may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits (bits), symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The various illustrative logical modules, and circuits described in connection with the embodiments disclosed herein may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.

In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk (disk) and disc (disc), as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks (disks) usually reproduce data magnetically, while discs (discs) reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An extended range battery system for an electric vehicle, comprising:

the main battery is mounted on the electric automobile and used for providing energy for the electric automobile;

a range-extending battery module replaceably mounted to the electric vehicle;

the direct current boosting module is connected to the main battery, and the range-extended battery module installed on the electric automobile charges the main battery through the direct current boosting module; wherein,

each of the extended-range battery modules is provided with a BMS module, and at least one extended-range battery module installed on the electric vehicle charges the main battery in response to a charging signal output from the corresponding BMS module.

2. The extended range battery system of claim 1, wherein each extended range battery module is provided with a relay between the extended range battery module and the dc boost module, the relay of the at least one extended range battery module communicating the extended range battery module to the dc boost module in response to a charging signal output by the corresponding BMS module to charge the main battery.

3. The extended range battery system of claim 1, wherein a vehicle controller is disposed in the electric vehicle, the BMS module of the extended range battery module mounted on the electric vehicle is connected to the vehicle controller, and the charging signal output by the corresponding BMS module of the at least one extended range battery module is received from the vehicle controller.

4. The extended range battery system of claim 3, wherein the charging signal is received by a respective BMS module of the at least one extended range battery module from the vehicle control unit in response to the state of charge information of the main battery being less than a preset threshold.

5. The extended range battery system of claim 4, wherein a plurality of the extended range battery modules are mounted on the electric vehicle, and the charging signal is received from the vehicle control unit by a corresponding BMS module of each of the extended range battery modules in response to the battery capacity information of the main battery being less than a preset threshold.

6. The extended range battery system according to claim 4, wherein a plurality of the extended range battery modules are mounted on the electric vehicle, and a corresponding BMS module of the extended range battery module having the smallest information on the power level of the extended range battery module among the plurality of extended range battery modules receives the charging signal from the vehicle controller in response to the information on the power level of the main battery being less than a preset threshold.

7. The extended range battery system of claim 1, wherein each of the extended range battery modules has the same output interface, so that signals can be transmitted and received between the plurality of extended range battery modules and the dc boost module or the main battery through the same communication protocol.

8. The extended range battery system of claim 1, wherein each of the extended range battery modules has the same external dimensions.