CN103640493A - Range extending system of electric automobile - Google Patents

The invention discloses a range extending system of an electric automobile. The range extending system of the electric automobile comprises a battery and a battery management unit, wherein a battery cathode is connected with a cathode high-voltage connector through a cathode contactor; a pre-charging resistor and a pre-charging contactor which are connected in series are connected with the cathode contactor in parallel and connected to a circuit between a battery anode and an anode high-voltage connector; and the pre-charging resistor, the pre-charging contactor and a control end of the cathode contactor are connected with the battery management unit. According to the range extending system of the electric automobile, modular design is adopted, the structure is simple, the performance is reliable, a range-extending requirement of a client can be met, the product compatibility is good simultaneously, the range-extending system can be replaced on vehicles with the same type, the system is manufactured by standard configuration components of a non-full vehicle, the manufacturing cost is reduced, the system can be obtained through leasing, purchasing or asking for help, and a direct-current power resource is used, so that the use cost can be effectively reduced; and besides, the range extending system can be used as fault rescue equipment for a battery system of the electric automobile.

A kind of range increasing system of electric vehicle

Technical field

The present invention relates to power battery system of electric vehicle technical field.

Background technology

Along with socioeconomic growing, energy demand further improves, the cry of new energy technology is more and more higher, at present in auto trade, further developing of pure electric automobile and Development of HEV Technology solved part energy problem, but also have many drawbacks, such as the hysteresis of battery technology, course continuation mileage is too short etc.For ensureing that a kind of portable power that pure electric automobile is born in the situation that there is battery failures and battery electric quantity deficiency increases journey system.

Current existing range extender system, as the disclosed fuel oil distance increasing unit for battery-driven car in patent CN102652090A, distance increasing unit is exactly a small-sized generator set in fact, driving engine, electrical generator, frequency converter and control system, consists of.In vehicle traveling process, can automatically start generating according to whole vehicle state, operating mode and battery electric quantity, auto-stop after charging, also can be carved when needed and be manually booted and shut down by chaufeur.The order of fuel oil distance increasing unit control system response controller of whole electric vehicle, the required voltage and current of output power drive system, realizes the stable control, the most economical working point control of driving engine of loading and unloading etc.But this type of distance increasing unit use cost is high, and the frequency of utilization of product is lower, fuel efficiency is low, thereby vehicle fuel distance increasing unit is produced mechanical energy and is produced automobile power by combustion in IC engine gasoline, mechanical energy drives electrical generator to convert alternating current to, and then AC rectification is become to direct current (DC), the complicated energy consumption of switching process is high, from causing product fuel efficiency low.

Summary of the invention

Technical matters to be solved by this invention be realize a kind of manufacture, use cost is low, service-strong distance increasing unit.

To achieve these goals, the technical solution used in the present invention is: a kind of range increasing system of electric vehicle, comprise battery and battery management unit, described battery cathode connects negative pole high-voltage connector through negative pole contactless switch, pre-charge resistance, the precharge contactless switch of series connection are in parallel with anodal contactless switch, and on anode and the circuit between anodal high-voltage connector described in access, the control end of described precharge contactless switch, anodal contactless switch and negative pole contactless switch is connected with described battery management unit.

In described cell circuit, be provided with wire fuse and manual maintenance switch.

Described battery cathode output circuit is provided with sampling resistor, and described sampling resistor is delivered to battery management unit by sampled signal.

Described range increasing system of electric vehicle is solidificated in housing, in described housing, is provided with temperature sensor, and described temperature sensor output temperature signal is to battery management unit.

In described range increasing system of electric vehicle, be provided with radiator fan, and battery is provided with radiating fin outward, in described housing, is provided with aerofoil, described housing two ends are provided with radiation air hole.

A range increasing system of electric vehicle management process, outgoing current and the battery temperature of battery management unit Real-time Collection battery, cut off feed circuit and alarm occur if surpass pre-set threshold value.

The temperature gathering when battery management unit surpasses the default temperature threshold values of opening fan, starts fan, and along with rotation speed of the fan is accelerated in the rising of temperature.

The invention has the advantages that native system structure adopts modular design, simple in structure, dependable performance, can meet client and increase journey demand, Products Compatibility is good simultaneously, can be at the enterprising line replacement of same model, system adopts non-car load standard configuration parts to make, and reduces manufacturing cost, the acquisition of can leasing or buy or require assistance, and use direct supply, also can effectively reduce use cost, and product also can be used as electric vehicle battery system fault rescue equipment in addition.

Accompanying drawing explanation

Below the content of every width accompanying drawing expression in specification sheets of the present invention and the mark in figure are briefly described:

Fig. 1 is distance increasing unit high pressure topological diagram;

Mark in above-mentioned figure is: 1, battery; 2, wire fuse; 3, manual maintenance switch; 4, sampling resistor; 5, negative pole contactless switch; 6, pre-charge resistance; 7, precharge contactless switch; 8, anodal contactless switch; 9, negative pole high-voltage connector; 10, anodal high-voltage connector.

The specific embodiment

Battery management unit is responsible for the charging and discharging management of whole system, and the radical function having is as follows:

Charging and discharging management: voltage acquisition, comprises monomer voltage and bus voltage; Monomer voltage collection is not put for protection battery cell does not overcharge or crosses; Total voltage collection is that power brick discharges and recharges safely, calculates SOC foundation is provided;

Current acquisition function; Current acquisition is the basic data of ampere-hour integral and calculating SOC, and meanwhile, current acquisition is that real-time monitoring battery bag discharges and recharges power;

High-voltage insulating resistance acquisition function; For guaranteeing that manned vehicle high-tension battery bag does not constitute a threat to personal safety, need to gather high-voltage insulating resistance;

High tension loop contactless switch is controlled and diagnosis function; The safety of high-pressure system discharges and recharges the break-make that just must control high-pressure system, and high tension loop contactless switch is controlled and diagnosis has realized the control of high-pressure system break-make and failure diagnosis;

SOC forecast function; By the high speed to electric current accurately sample, by the information such as total voltage, monomer voltage, temperature are comprehensively judged, realized the adaptive prediction of SOC, system can automatic learning and is revised important parameter

SOH forecast function; The SOH index decreased that how to delay battery on main research control policy, SOH is also an important referential data of SOC prediction, battery maintenance, also affects the course continuation mileage of car load simultaneously.

SOF management function; The charging and discharging capabilities of SOF management function prediction power brick current time maximum, for car load power distribution and charging ability provide foundation;

With car load communication and tactful interactive maintenance function; Realize alternately car load safe-discharge with car load communication and strategy, effectively brought into play battery performance, met car load dynamic property and economy;

System high pressure safety management function; Power brick is high voltage component, and high-voltage safety management has realized safe power-on and power-off and the charging safety of high-pressure system;

Charge Management function; Charge Management function has realized with Vehicular charger charges to power brick with fill device is safe and orderly soon;

Monomer balanced management function; The conformability of battery pack is a large technical barrier of restriction power battery pack widespread use always, and the research contents of balancing technique is for detecting and balance multiplex technique, and this technology can be good at having solved consistency problem, realizes online dynamic equalization in real time.This technology accomplishes can carry out energy transfer to the higher monomer of voltage in charging, guarantees that whole power brick obtains maximum energy supplement, in electric discharge, can carry out energy supplement to the monomer of low voltage, improves course continuation mileage.

By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.