CN206422545U - A kind of hybrid energy storage system of electric automobile with voltage balancing function - Google Patents

Abstract

The utility model discloses a kind of hybrid energy storage system of electric automobile with voltage balancing function, including battery assembly module, ultracapacitor group unit, first switch pipe unit, second switch pipe unit；The battery assembly module includes the first battery, the second battery and the 3rd battery, the ultracapacitor group unit includes the first super capacitor, the second super capacitor, the 3rd super capacitor, first switch and second switch, the first switch pipe unit includes first switch pipe, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube, and the second switch pipe unit includes the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, the 11st switching tube and the 12nd switching tube.The utility model has the advantages that to realize that voltage automatic equalization, systemic-function are abundant and capacity usage ratio is high.

Description

A kind of hybrid energy storage system of electric automobile with voltage balancing function

Technical field

The utility model is related to electric automobile electric power system field, refers in particular to a kind of electronic with voltage balancing function Automobile mixed energy storage system.

Background technology

With the increasingly lifting of people's environmental consciousness, electric automobile replaces orthodox car to turn into a kind of trend, and continues a journey and ask Topic, issue for battery life and performance issue again limit the development of electric automobile.Lithium ion battery energy storage effect is good, energy density Advantage that is high and having extended cycle life makes it be suitably for the long-play of electric automobile offer energy.Super capacitor has power close Degree is high, and charging rate is fast, the characteristics of large current discharging capability is superpower, therefore super capacitor is suitably for electric automobile and starts or accelerate When produce enough power, while super capacitor is also adaptable as the intermediate buffer layer of energy regenerating, i.e., first electric vehicle handlebar is stopped The energy fast storage produced when car and deceleration is transferred in battery, it is to avoid short by super capacitor again afterwards into super capacitor Influence of the high current that time produces to battery life, has advantageously accounted for performance issue, continuation of the journey problem and battery life and has asked Topic.Cell balancing then may insure that the voltage at each energy-storage units two ends in electric automobile energy-storage system is of substantially equal, Be conducive to extending the service life of energy-storage system.

The content of the invention

The purpose of this utility model is to overcome the shortcoming and defect of prior art, and there is provided a kind of achievable electric voltage equalization Hybrid energy storage system of electric automobile, high using super capacitor power density, charging rate is fast, the superpower spy of large current discharging capability Point, when electric automobile starts or accelerates, replaces battery pack to be energized for electric automobile using superbattery group, realizes quick start And acceleration；Because battery energy density is high, it is adapted to discharge for a long time, after electric automobile Acceleration of starting is to desired speed, switchs to It is battery-powered.In addition, using the characteristic of super capacitor, the energy storage that quickly electric automobile brake deceleration can be produced rises Come, be then transferred in battery pack and store；The utility model can realize the voltage automatic equalization of mixed energy storage system, simplify electricity Road and control mode.

To achieve the above object, technical scheme provided by the utility model is：A kind of electricity with voltage balancing function Electrical automobile mixed energy storage system, including battery assembly module, ultracapacitor group unit, first switch pipe unit, second switch pipe Unit；The battery assembly module includes the first battery, the second battery and the 3rd battery, and the ultracapacitor group unit includes the One super capacitor, the second super capacitor, the 3rd super capacitor, first switch and second switch, the first switch pipe unit bag Include first switch pipe, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube, described second Switching pipe unit includes the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, the 11st switching tube and the tenth Two switching tubes；First battery, the second battery and the 3rd battery are the equal lithium ion battery of capacity, first battery Positive pole be connected with the drain electrode of first switch pipe, the negative pole of first battery, the positive pole of the second battery, the leakage of second switch pipe Drain electrode of the pole respectively with the 3rd switching tube is connected, the negative pole of second battery, the positive pole of the 3rd battery, the leakage of the 4th switching tube Drain electrode of the pole respectively with the 5th switching tube is connected, and the negative pole of the 3rd battery is connected with the drain electrode of the 6th switching tube；Described One super capacitor, the second super capacitor and the 3rd super capacitor are the equal super capacitor of capacitance, the first switch and Second switch is electromagnetic relay, the positive pole of first super capacitor, the source electrode of first switch pipe respectively with the 7th switching tube Drain electrode be connected, the negative pole of first super capacitor, the source electrode of second switch pipe, the drain electrode of the 8th switching tube are respectively with first One end of switch is connected, and the other end of the first switch, the source electrode of the 3rd switching tube, the drain electrode of the 9th switching tube are respectively with the The positive pole of two super capacitors is connected, the negative pole of second super capacitor, the source electrode of the 4th switching tube, the drain electrode of the tenth switching tube It is connected respectively with one end of second switch, the other end of the second switch, the source electrode of the 5th switching tube, the 11st switching tube The positive pole respectively with the 3rd super capacitor that drains is connected, the negative pole of the 3rd super capacitor, the source electrode difference of the 6th switching tube Drain electrode with the 12nd switching tube is connected；The grid of the first switch pipe to the 6th switching tube is connected, and believes by the first driving Number driving；7th switching tube, source electrode of the 9th switching tube respectively with the 11st switching tube are connected, the 8th switching tube, Source electrode of tenth switching tube respectively with the 12nd switching tube is connected, the grid phase of the 7th switching tube to the 12nd switching tube Even, driven by the second drive signal；First drive signal and the second drive signal are two-way complementary signal, and dutycycle is equal For 50%.

The utility model compared with prior art, has the following advantages that and beneficial effect：

1st, the utility model has the function of electric voltage equalization.

2nd, the utility model control is simple, and devices use rate is high, saves space.

3rd, the utility model makes full use of the advantage of lithium ion battery and super capacitor, improves the dynamic of electric automobile Energy.

Brief description of the drawings

Fig. 1 is the structure chart of hybrid energy storage system of electric automobile described in the utility model.

Fig. 2 is battery pack when hybrid energy storage system of electric automobile described in the utility model is in electric voltage equalization working condition The voltage oscillogram of each unit.

Fig. 3 is super electricity when hybrid energy storage system of electric automobile described in the utility model is in electric voltage equalization working condition The voltage oscillogram of container group each unit.

Fig. 4 is Fig. 3 partial enlargement image.

Embodiment

The utility model is described further with reference to specific embodiment.

As shown in figure 1, the hybrid energy storage system of electric automobile described in the present embodiment, including battery assembly module B, super capacitor Device group unit C, first switch pipe unit X, second switch pipe unit Y；The battery assembly module B includes the first battery B₁, second Battery B₂With the 3rd battery B₃；The ultracapacitor group unit C includes the first super capacitor SC₁, the second super capacitor SC₂, Three super capacitor SC₃, first switch S_aWith second switch S_b；The first switch pipe unit X includes first switch pipe S₁₁, second Switching tube S₁₂, the 3rd switching tube S₂₁, the 4th switching tube S₂₂, the 5th switching tube S₃₁With the 6th switching tube S₃₂；The second switch Pipe unit Y includes the 7th switching tube S₁₃, the 8th switching tube S₁₄, the 9th switching tube S₂₃, the tenth switching tube S₂₄, the 11st switching tube S₃₃With the 12nd switching tube S₃₄.The first battery B₁, the second battery B₂With the 3rd battery B₃It is the equal lithium ion of capacity Battery；The first battery B₁Positive pole and first switch pipe S₁₁Drain electrode be connected；The first battery B₁Negative pole, second electricity Pond B₂Positive pole, second switch pipe S₁₂Drain electrode and the 3rd switching tube S₂₁Drain electrode be connected；The second battery B₂Negative pole, Three battery B₃Positive pole, the 4th switching tube S₂₂Drain electrode and the 5th switching tube S₃₁Drain electrode be connected；The 3rd battery B₃It is negative Pole and the 6th switching tube S₃₂Drain electrode be connected；The first super capacitor SC₁, the second super capacitor SC₂With the 3rd super capacitor SC₃It is the equal super capacitor of capacitance；The first switch S_aWith second switch S_bFor electromagnetic relay；It is described the first to surpass Level electric capacity SC₁Positive pole, first switch pipe S₁₁Source electrode and the 7th switching tube S₁₃Drain electrode be connected；First super capacitor SC₁Negative pole, second switch pipe S₁₂Source electrode, the 8th switching tube S₁₄Drain electrode and first switch S_aOne end be connected；Described One switch S_aThe other end, the 3rd switching tube S₂₁Source electrode, the 9th switching tube S₂₃Drain electrode and the second super capacitor SC₂Positive pole It is connected；The second super capacitor SC₂Negative pole, the 4th switching tube S₂₂Source electrode, the tenth switching tube S₂₄Drain electrode and second open Close S_bOne end be connected；The second switch S_bThe other end, the 5th switching tube S₃₁Source electrode, the 11st switching tube S₃₃Drain electrode With the 3rd super capacitor SC₃Positive pole be connected；The 3rd super capacitor SC₃Negative pole, the 6th switching tube S₃₂Source electrode and 12 switching tube S₃₄Drain electrode be connected；The first switch pipe S₁₁To the 6th switching tube S₃₂Grid be connected, by first driving Signal G_XDriving；The 7th switching tube S₁₃, the 9th switching tube S₂₃With the 11st switching tube S₃₃Source electrode be connected；Described 8th Switching tube S₁₄, the tenth switching tube S₂₄With the 12nd switching tube S₃₄Source electrode be connected；The 7th switching tube S₁₃To the 12nd switch Pipe S₃₄Grid be connected, by the second drive signal G_YDriving；The drive signal G_XWith drive signal G_YBelieve for two-way complementation Number, dutycycle is 50%.

By electric automobile Working state analysis, the above-mentioned hybrid energy storage system of electric automobile of the present embodiment can be divided into several Plant working condition：

State I：Start or acceleration mode.First switch and second switch closure, the first super capacitor, the second super capacitor With the 3rd super capacitor composition ultracapacitor group electric energy is provided for motor in electric automobile load.

State I I：Transport condition.First switch and second switch closure are disconnected, and battery pack is loaded to motor in electric automobile to be grown Time provides electric energy.

State I II：The electric voltage equalization first stage.First switch and second switch closure disconnect, first switch pipe to the 6th Switching tube is turned on, and the 7th switching tube is turned off to the 12nd switching tube.First super capacitor, the second super capacitor and the 3rd super electricity Appearance is connected in parallel on the first battery, the second battery and the 3rd battery two ends respectively.When the voltage of super capacitor is higher than battery terminal voltage, Battery charges；When the voltage of super capacitor is less than battery terminal voltage, battery discharge.

State I V：Electric voltage equalization second stage.First switch and second switch closure are disconnected, and first switch pipe is opened to the 6th Pipe shut-off is closed, the 7th switching tube is turned on to the 12nd switching tube, the first super capacitor, the second super capacitor and the 3rd super capacitor It is connected in parallel, the high electric discharge of voltage in three, the low charging of voltage.

It is shown in Figure 2, it can be seen that battery B1, B2 and B3 initial voltage are different, respectively 3, 2.5 and 2V, when system is operated under balanced mode, finally achievable voltage is equal by three, and about 2.5V realizes that voltage is equal Weighing apparatus.

Shown in Figure 3, when the switching tube conducting of first switch pipe unit, super capacitor is to battery discharge or battery Super capacitor is charged；When second switch pipe is turned on, super capacitor quickly realizes that voltage is equal.Shown in Figure 4, first opens When closing the switching tube conducting of pipe unit, super capacitor SC1 absorbs electric energy from battery B1, and voltage rises；Super capacitor SC2 and battery B2 voltages are close, and voltage does not change；Super capacitor SC3 discharges battery B3, and voltage declines；And during the conducting of second switch pipe, Super capacitor SC1, SC2 and SC3 voltage quickly realize equilibrium, are 2.5V.

Embodiment described above is only the preferred embodiment of the utility model, not limits implementation of the present utility model with this Scope, therefore the change that all shape, principles according to the utility model are made, all should cover in protection domain of the present utility model.

Claims (1)

1. a kind of hybrid energy storage system of electric automobile with voltage balancing function, it is characterised in that：Including battery assembly module, surpass Level capacitor bank units, first switch pipe unit, second switch pipe unit；The battery assembly module includes the first battery, second Battery and the 3rd battery, the ultracapacitor group unit include the first super capacitor, the second super capacitor, the 3rd super electricity Hold, first switch and second switch, the first switch pipe unit include first switch pipe, second switch pipe, the 3rd switching tube, 4th switching tube, the 5th switching tube and the 6th switching tube, the second switch pipe unit include the 7th switching tube, the 8th switch Pipe, the 9th switching tube, the tenth switching tube, the 11st switching tube and the 12nd switching tube；First battery, the second battery and Three batteries are the equal lithium ion battery of capacity, and the positive pole of first battery is connected with the drain electrode of first switch pipe, described The drain electrode of the negative pole of first battery, the positive pole of the second battery, the drain electrode of second switch pipe respectively with the 3rd switching tube is connected, described The drain electrode of the negative pole of second battery, the positive pole of the 3rd battery, the drain electrode of the 4th switching tube respectively with the 5th switching tube is connected, described The negative pole of 3rd battery is connected with the drain electrode of the 6th switching tube；First super capacitor, the second super capacitor and the 3rd are super Electric capacity is the equal super capacitor of capacitance, and the first switch and second switch are electromagnetic relay, and described first is super The drain electrode of the positive pole of electric capacity, the source electrode of first switch pipe respectively with the 7th switching tube is connected, the negative pole of first super capacitor, The source electrode of second switch pipe, the drain electrode of the 8th switching tube are connected with one end of first switch respectively, the first switch it is another The positive pole of end, the drain electrode of the source electrode of the 3rd switching tube, the 9th switching tube respectively with the second super capacitor is connected, and described second is super The negative pole of electric capacity, the source electrode of the 4th switching tube, the drain electrode of the tenth switching tube are connected with one end of second switch respectively, and described second The positive pole of the other end of switch, the source electrode of the 5th switching tube, the drain electrode of the 11st switching tube respectively with the 3rd super capacitor is connected, Drain electrode of the negative pole, the source electrode of the 6th switching tube of 3rd super capacitor respectively with the 12nd switching tube is connected；Described first The grid of switching tube to the 6th switching tube is connected, and is driven by the first drive signal；7th switching tube, the 9th switching tube point Source electrode not with the 11st switching tube is connected, the 8th switching tube, the source electrode of the tenth switching tube respectively with the 12nd switching tube It is connected, the grid of the 7th switching tube to the 12nd switching tube is connected, and is driven by the second drive signal；First driving Signal and the second drive signal are two-way complementary signal, and dutycycle is 50%.