CN212473174U - Novel rapid equalization topological circuit applied to storage battery pack - Google Patents

Novel rapid equalization topological circuit applied to storage battery pack Download PDF

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Publication number
CN212473174U
CN212473174U CN201922458817.4U CN201922458817U CN212473174U CN 212473174 U CN212473174 U CN 212473174U CN 201922458817 U CN201922458817 U CN 201922458817U CN 212473174 U CN212473174 U CN 212473174U
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power switch
inductor
battery
storage battery
charging
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夏益辉
冯国利
叶志浩
张晓锋
赵镜红
王泽润
乔鸣忠
黄靖
肖晗
陈诚
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Naval University of Engineering PLA
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Naval University of Engineering PLA
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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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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Abstract

A novel rapid equalization topological circuit applied to a storage battery pack comprises the storage battery pack, a first power switch group, a second power switch group and an inductor L; the accumulator battery comprises an accumulator battery B1To Bn(ii) a The first power switch group comprises a power switch B21‑To Bn1‑And B22‑To Bn2‑(ii) a The second power switch group comprises a power switch B11+To Bn1+And B42+To Bn2+；B22‑To Bn2‑All connected to the A terminal of L, B22‑To Bn2‑Respectively with B21‑To Bn1‑Source connection of B21‑To Bn1‑Respectively with B2To BnThe negative electrode of (1) is connected; b is11+Drain electrode and B1Positive electrode connection, B11+Source connected to terminal A of L, B21+To Bn1+Drain electrodes are respectively connected with B2To BnIs connected to the positive electrode.

Description

Novel rapid equalization topological circuit applied to storage battery pack
Technical Field
The utility model relates to a storage battery's balanced topological structure, concretely relates to be applied to storage battery's novel quick balanced topological circuit.
Background
The traditional power automobile using diesel oil and gasoline as raw materials produces a large amount of waste gas and waste smoke, seriously pollutes air and reduces environmental quality. At present, many countries around the world have signed agreements that consistently require the cessation of exhaust emissions from traditional powered vehicles. Environmental pollution of our country is serious, haze weather appears in most areas of our country in 2018, and the duration of some areas is more, so that normal life and traveling of people are threatened. In order to improve the environmental quality and reduce the environmental pollution, China clearly points out that the electric automobile industry needs to be developed in a key way in the development planning of the 'twelve five' country, the technical innovation of the electric automobile industry is promoted, and the electric automobile is put into daily life as soon as possible. The storage battery pack is used as an important component of an electric automobile and provides energy for the whole automobile, and certain differences inevitably exist in the production and the manufacturing of the storage battery, and the differences are gradually amplified along with the difference of the charging and discharging depths of the storage battery. When the storage batteries are discharged, the storage batteries with small residual capacity can be over-discharged, and the energy of the storage batteries is exhausted to cause permanent damage in severe cases; when the storage batteries are charged, the storage batteries with large residual electric quantity can be overcharged, and the storage batteries can explode to cause accidents in severe cases.
The storage battery pack is not only used for electric vehicles, but also widely applied to other fields, such as energy storage devices, emergency power supplies and the like, and the problem of quick balance control of the storage battery pack also exists.
The existing automatic equalization topological structure of the storage battery pack is based on the series transmission of energy among the storage battery packs, and the direct transmission of energy among any storage battery can not be realized, so that the automatic equalization time can be increased, the power consumption can be increased, and the equalization efficiency can be reduced.
Therefore, how to optimize the automatic equalization topological structure of the design storage battery, reduce the power loss of the equalization control system and improve the speed of automatic equalization control, it is the utility model discloses the main problem of considering the solution.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides a be applied to storage battery's novel quick balanced topology circuit, through control power switch's break-make chronogenesis, can realize energy transfer and equilibrium between the arbitrary battery, and then realize storage battery's equilibrium. The technical scheme of the utility model as follows:
a novel rapid equalization topological circuit applied to a storage battery pack comprises the storage battery pack, a first power switch group, a second power switch group and an inductor L;
the storage battery pack comprises storage batteries B connected in series in sequence1，B2，…，BnAccumulator B1Negative electrode of (2) is connected with a storage battery B2Positive electrode of (1), secondary battery B2Negative electrode of (2) is connected with a storage battery B3The positive pole of (1), analogizing in turn, the storage battery Bn-1Negative electrode of (2) is connected with a storage battery BnThe positive electrode of (1);
the first power switch group consists of a power switch B21-，B31-，…，Bn1-And a power switch B22-， B32-，…，Bn2-Composition is carried out; the second power switch group comprises a power switch B11+，B21+，…，Bn1+And a power switch B42+，B52+，…，Bn2+；
Wherein, the power switch B22-，B32-，…，Bn2-Common drain connected to the A terminal of the inductor L, and power switch B22-，B32-，…，Bn2-Respectively with a power switch B21-，B31-，…， Bn1-Source connection of, power switch B21-，B31-，…，Bn1-Respectively with the storage battery B2，B3，…， BnThe negative electrode of (1) is connected;
wherein, the power switch B11+Drain electrode of (2) and battery B1Is connected to the positive pole of the power switch B11+Is connected with the A end of an inductor L, and a power switch B21+，B31+，…，Bn1+Drain electrodes of the two electrodes are connected to a storage battery B2，B3，…，BnThe positive electrode of (1) is connected; power switch B21+And B31+The source electrodes of the two-way switch are connected with the end B of an inductor L, and a power switch B41+，B51+，…，Bn1+Respectively with a power switch B42+，B52+，…，Bn2+Source connection of, power switch B42+，B52+，…，Bn2+Is connected to the B terminal of the inductor L.
Further, the power switch is an insulated gate bipolar transistor or a MOSFET tube.
Further, a battery B1Power switch B11+Power switch B21+The first charging and discharging loop 1 is formed by connecting the inductor L in series;
when the power switch B11+Conducting and power switch B21+When turned off, the current is storedBattery B1Flows out of the positive pole and passes through the power switch B11+Inductor L and power switch B21+Body diode of (2) backward flow to battery (B)1Thereby forming a 1 st discharge circuit through which the battery B passes1The electric energy is gradually transferred to the inductor L to store energy for the inductor L.
When the power switch B11+Switch-off, power switch B21When the inductor L is switched on, the current flows out from the end A of the inductor L and sequentially passes through the rate switch B11+Body diode and battery B1Power switch B21+Then flows to the end B of the inductor L, thereby forming a 1 st charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the loop1Is a storage battery B1And (6) charging.
Further, a battery B2Power switch B21+Power switch B22-Power switch B21-And an inductor L form a 2 nd charging and discharging loop;
when the power switch B21+And B22-Conducting, power switch B21-When turned off, the current is supplied to the storage battery B2Flows out of the positive pole and passes through the power switch B21+Inductor L and power switch B22-Power switch B21-Body diode of (2) backward flow to battery (B)2Thereby forming a 2 nd discharge circuit through which the battery B passes2The electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch B21-Conducting, power switch B21+And B22-When the power switch is turned off, the current flows out from the end B of the inductor L and sequentially passes through the power switch B21+Body diode and battery B2Power switch B21-Power switch B22-Then flows to the a terminal of the inductor L, thereby forming a 2 nd charging loop through which the energy of the inductor L is gradually transferred to the battery B2Is a storage battery B2And (6) charging.
Further, a battery B3Power switch B31+Power switch B32-Power switch B31-And inductor L groupForming a 3 rd charge-discharge loop;
when the power switch B31+And B32-Conducting, power switch B31-When turned off, the current is supplied to the storage battery B3Flows out of the positive pole and passes through the power switch B31+Inductor L and power switch B32-And a power switch B31-To the battery B3Thereby forming a 3 rd discharge circuit through which the secondary battery B passes3The electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch B31-Conducting, power switch B31+And B32-When the power switch is turned off, the current flows out from the end B of the inductor L and sequentially passes through the power switch B31+Body diode and battery B3Power switch B31-Power switch B32-Then flows to the a terminal of the inductor L, thereby forming a 3 rd charging loop through which the energy of the inductor L is gradually transferred to the battery B3Is a storage battery B3And (6) charging.
Further, a battery B3Power switch B21-Power switch B22-Power switch B41+Power switch B42+And an inductor L form a 3 rd charge-discharge loop;
when the power switch B21-And do B42+Conducting, power switch B22-And B41+When turned off, the current is supplied to the storage battery B3Flows out of the positive pole and passes through the power switch B21-Power switch B22-Body diode, inductor L and power switch B42+Power switch B41+Body diode of (2) backward flow to battery (B)3Thereby forming a 3 rd discharge circuit through which the secondary battery B passes3The electric energy is gradually transferred to the inductor L to store energy for the inductor L.
When the power switch B22-And B41+Conducting, power switch B21-And do B42+When the power supply is turned off, current flows out from the end A of the inductor L and sequentially passes through the power switch B22-Power switch B21-Body diode and battery B3"Gong" exerciseRate switch B41+Power switch B42+Then flows to the end B of the inductor L, thereby forming a 3 rd charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the loop3Is a storage battery B3And (6) charging.
Further, a battery BjPower switch Bj1+Power switch Bj2+Power switch Bj1-Power switch Bj2-The inductor L forms a jth charging and discharging loop;
when the power switch Bj1+And Bj2-Conducting, power switch Bj2+、Bj1-When turned off, the current is supplied to the storage battery BjFlows out of the positive pole and passes through the power switch Bj1+Power switch Bj2+Body diode and power switch Bj2-Power switch Bj1-Body diode of (2) backward flow to battery (B)jThereby forming a j-th discharge circuit through which the secondary battery B passesjThe electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch Bj2+、Bj1-Conducting, power switch Bj1+And Bj2-When the power supply is disconnected, current flows out from the end B of the inductor L and sequentially passes through the power switch Bj2+Power switch Bj1+Body diode and battery BjPower switch Bj1-Power switch Bj2-Then flows to the A end of the inductor L, thereby forming a j charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the j charging loopjIs a storage battery BjCharging;
wherein j is 4, 5, …, n.
Further, a battery BjPower switch B(j+1)1+Power switch B(j+1)2B, power switch(j-1)1-Power switch B(j-1)2-The inductor L forms a jth charging and discharging loop;
when the power switch B(j-1)1-And do B(j+1)2+Conducting, power switch B(j-1)2-And B(j+1)1+When turned off, the current is supplied to the storage battery BjFlows out of the positive pole and passes through the power switch B(j-1)1-Power switch B(j-1)2-Body diode, inductor L and power switch B(j+1)2+Power switch B(j+1)1+Body diode of (2) backward flow to battery (B)jThereby forming a j-th discharge circuit through which the secondary battery B passesjThe electric energy is gradually transferred to the inductor L to store energy for the inductor L.
When the power switch B(j-1)2-And B(j+1)1+Conducting, power switch B(j-1)1-And do B(j+1)2+When the power supply is turned off, current flows out from the end A of the inductor L and sequentially passes through the power switch B(j-1)2-Power switch B(j-1)1-Body diode, storage battery Bj and power switch B(j+1)1+Power switch B(j+1)2+Then flows to the B end of the inductor L, thereby forming a j charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the j charging loopjIs a storage battery BjAnd (6) charging.
Furthermore, the topology circuit further comprises an electric quantity monitoring device for monitoring the electric quantity of each storage battery in the storage battery pack and a power switch control device for controlling the on-off of the power switch, wherein the electric quantity monitoring device is connected with the power switch control device and is used for transmitting the monitored electric quantity information of each storage battery to the power switch control device, and the power switch control device is used for controlling the on-off of the corresponding power switch according to the electric quantity information of each storage battery.
The utility model discloses following beneficial effect has:
the utility model provides a be applied to storage battery's novel quick balanced topology circuit, through control power switch's break-make chronogenesis, realize energy transfer and equilibrium between the arbitrary battery, and then realize storage battery's equilibrium.
Drawings
Fig. 1 is a circuit diagram of a novel fast equalization topology applied to a storage battery according to an embodiment of the present invention;
fig. 2 shows a storage battery B provided by the embodiment of the present invention1A loop circuit diagram for storing energy to the inductor L;
fig. 3 is a storage battery B provided by the embodiment of the utility model1A loop circuit diagram of the absorption inductor L for storing energy;
fig. 4 is a storage battery B provided by the embodiment of the utility model2A loop circuit diagram for storing energy to the inductor L;
fig. 5 is a storage battery B provided by the embodiment of the utility model2A loop circuit diagram of the absorption inductor L for storing energy;
fig. 6 is a storage battery B provided by the embodiment of the utility model3A loop circuit diagram for storing energy to the inductor L;
fig. 7 is a storage battery B provided by the embodiment of the utility model3A loop circuit diagram of the absorption inductor L for storing energy;
fig. 8 is a storage battery B provided by the embodiment of the utility model3A loop circuit diagram for storing energy to the inductor L;
fig. 9 is a storage battery B provided by the embodiment of the present invention3A loop circuit diagram of the absorption inductor L for storing energy;
fig. 10 shows a storage battery B provided by an embodiment of the present invention4A loop circuit diagram for storing energy to the inductor L;
fig. 11 is a circuit diagram of a circuit for storing energy by the battery B4 absorbing the inductor L according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, as a first embodiment of the present invention, a novel fast equalization topology circuit applied to a storage battery pack is provided, which includes a storage battery pack, a first power switch group, a second power switch group, and an inductor L;
the storage battery pack comprises storage batteries B connected in series in sequence1，B2，…，BnAccumulator B1Negative electrode of (2) is connected with a storage battery B2Positive electrode of (1), secondary battery B2Negative electrode of (2) is connected with a storage battery B3The positive pole of (1), analogizing in turn, the storage battery Bn-1Negative electrode of (2) is connected with a storage battery BnThe positive electrode of (1);
the first power switch group consists of a power switch B21-，B31-，…，Bn1-And a power switch B22-， B32-，…，Bn2-Composition is carried out; the second power switch group comprises a power switch B11+，B21+，…，Bn1+And a power switch B42+，B52+，…，Bn2+；
Wherein, the power switch B22-，B32-，…，Bn2-Common drain connected to the A terminal of the inductor L, and power switch B22-，B32-，…，Bn2-Respectively with a power switch B21-，B31-，…， Bn1-Source connection of, power switch B21-，B31-，…，Bn1-Respectively with the storage battery B2，B3，…， BnThe negative electrode of (1) is connected;
wherein, the power switch B11+Drain electrode of (2) and battery B1Is connected to the positive pole of the power switch B11+Is connected with the A end of an inductor L, and a power switch B21+，B31+，…，Bn1+Drain electrodes of the two electrodes are connected to a storage battery B2，B3，…，BnThe positive electrode of (1) is connected; power switch B21+And B31+The source electrodes of the two-way switch are connected with the end B of an inductor L, and a power switch B41+，B51+，…，Bn1+Respectively with a power switch B42+，B52+，…， Bn2+Source connection of, power switch B42+，B52+，…，Bn2+Is connected to the B terminal of the inductor L.
The power switch is an insulated gate two-stage transistor or a MOSFET tube.
The utility model provides a pair of be applied to storage battery's novel quick balanced topology circuit, break-make chronogenesis through control power switch realizes energy transfer and equilibrium between the arbitrary battery, and then realizes storage battery's equilibrium. For example, the residual capacity of the storage battery is monitored in real time, an automatic balancing control strategy of the storage battery pack is determined according to the residual capacity or voltage, and the on-off states and the working sequence of the power switch are determined according to the automatic balancing strategy, so that energy transfer between any storage batteries is realized, and further the automatic balancing of the bidirectional storage battery pack is realized.
As shown in FIGS. 2 to 3, a secondary battery B is a second embodiment of the present invention1Power switch B11+Power switch B21+The first charging and discharging loop 1 is formed by connecting the inductor L in series;
when the power switch B11+Conducting and power switch B21+When turned off, the current is supplied to the storage battery B1Flows out of the positive pole and passes through the power switch B11+Inductor L and power switch B21+Body diode of (2) backward flow to battery (B)1Thereby forming a 1 st discharge circuit through which the battery B passes1The electric energy is gradually transferred to the inductor L to store energy for the inductor L.
When the power switch B11+Switch-off, power switch B21When the inductor L is switched on, the current flows out from the end A of the inductor L and sequentially passes through the rate switch B11+Body diode and battery B1Power switch B21+Then flows to the end B of the inductor L, thereby forming a 1 st charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the loop1Is a storage battery B1And (6) charging.
The above embodiment, when the battery B1The residual electric quantity is higher, and the power switch B is controlled11+Conducting and power switch B21+Turning off the battery B through the 1 st discharging circuit1The electric energy of the inductor L is transferred to the inductor L, and other storage batteries with lower electric quantity can absorb the stored energy of the inductor L; when the battery B1When the residual electric quantity is lower, the power switch B is controlled11+Switch-off, power switch B21When + is switched on, the 1 st charging loop can absorb the stored energy of the inductor L, and other storage batteries with higher electric quantity can store the energy of the inductor L.
As a third embodiment of the present invention, a secondary battery B is shown in FIGS. 4 to 52Power switch B21+Power switch B22-Power switch B21-And an inductor L form a 2 nd charging and discharging loop;
when the power switch B21+And B22-Conducting, power switch B21-When turned off, the current is supplied to the storage battery B2Flows out of the positive pole and passes through the power switch B21+Inductor L and power switch B22-Power switch B21-Body diode of (2) backward flow to battery (B)2Thereby forming a 2 nd discharge circuit through which the battery B passes2The electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch B21-Conducting, power switch B21+And B22-When the power switch is turned off, the current flows out from the end B of the inductor L and sequentially passes through the power switch B21+Body diode and battery B2Power switch B21-Power switch B22-Then flows to the a terminal of the inductor L, thereby forming a 2 nd charging loop through which the energy of the inductor L is gradually transferred to the battery B2Is a storage battery B2And (6) charging.
The above embodiment, when the battery B2The residual electric quantity is higher, and the power switch B is controlled21+And B22-Conducting, power switch B21-Turning off the battery B through the 2 nd discharge circuit2The electric energy of the inductor L is transferred to the inductor L, and other storage batteries with lower electric quantity can absorb the stored energy of the inductor L; when the battery B2When the residual electric quantity is lower, the power switch B21-Conducting, power switch B21+And B22-And when the charging circuit is turned off, the stored energy of the inductor L can be absorbed through the No. 2 charging loop, and the stored energy of the inductor L can be stored by other storage batteries with higher electric quantity.
As a fourth embodiment of the present invention, as shown in FIGS. 6 to 7, a storage tankBattery B3Power switch B31+Power switch B32-Power switch B31-And an inductor L form a 3 rd charge-discharge loop;
when the power switch B31+And B32-Conducting, power switch B31-When turned off, the current is supplied to the storage battery B3Flows out of the positive pole and passes through the power switch B31+Inductor L and power switch B32-And a power switch B31-To the battery B3Thereby forming a 3 rd discharge circuit through which the secondary battery B passes3The electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch B31-Conducting, power switch B31+And B32-When the power switch is turned off, the current flows out from the end B of the inductor L and sequentially passes through the power switch B31+Body diode and battery B3Power switch B31-Power switch B32-Then flows to the a terminal of the inductor L, thereby forming a 3 rd charging loop through which the energy of the inductor L is gradually transferred to the battery B3Is a storage battery B3And (6) charging.
The above embodiment, when the battery B3The residual electric quantity is higher, and the power switch B is controlled31+And B32-Conducting, power switch B31-Turning off the battery B through a 3 rd discharge circuit3The electric energy of the inductor L is transferred to the inductor L, and other storage batteries with lower electric quantity can absorb the stored energy of the inductor L; when the battery B3When the residual electric quantity is lower, the power switch B is controlled31-Conducting, power switch B31+And B32-And when the charging circuit is turned off, the stored energy of the inductor L can be absorbed through the 3 rd charging loop, and the stored energy of the inductor L can be stored by other storage batteries with higher electric quantity.
As shown in FIGS. 8 to 9, a battery B as a fifth embodiment of the present invention3Power switch B21-Power switch B22-Power switch B41+Power switch B42+And an inductor L form a 3 rd charge-discharge loop;
when power switchB21-And do B42+Conducting, power switch B22-And B41+When turned off, the current is supplied to the storage battery B3Flows out of the positive pole and passes through the power switch B21-Power switch B22-Body diode, inductor L and power switch B42+Power switch B41+Body diode of (2) backward flow to battery (B)3Thereby forming a 3 rd discharge circuit through which the secondary battery B passes3The electric energy is gradually transferred to the inductor L to store energy for the inductor L.
When the power switch B22-And B41+Conducting, power switch B21-And do B42+When the power supply is turned off, current flows out from the end A of the inductor L and sequentially passes through the power switch B22-Power switch B21-Body diode and battery B3Power switch B41+Power switch B42+Then flows to the end B of the inductor L, thereby forming a 3 rd charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the loop3Is a storage battery B3And (6) charging.
The above embodiment, when the battery B3The residual electric quantity is higher, and the power switch B is controlled21-And do B42+Conducting, power switch B22-And B41+Turning off the battery B through a 3 rd discharge circuit3The electric energy of the inductor L is transferred to the inductor L, and other storage batteries with lower electric quantity can absorb the stored energy of the inductor L; when the battery B3When the residual electric quantity is lower, the power switch B is controlled22-And B41+Conducting, power switch B21-And do B42+And when the charging circuit is turned off, the stored energy of the inductor L can be absorbed through the 3 rd charging loop, and the stored energy of the inductor L can be stored by other storage batteries with higher electric quantity.
As shown in FIG. 10, a battery B according to a sixth embodiment of the present inventionjPower switch Bj1+Power switch Bj2+Power switch Bj1-Power switch Bj2-The inductor L forms a jth charging and discharging loop;
when the power switch Bj1+And Bj2-Conduction ofPower switch Bj2+、Bj1-When turned off, the current is supplied to the storage battery BjFlows out of the positive pole and passes through the power switch Bj1+Power switch Bj2+Body diode and power switch Bj2-Power switch Bj1-Body diode of (2) backward flow to battery (B)jThereby forming a j-th discharge circuit through which the secondary battery B passesjThe electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch Bj2+、Bj1-Conducting, power switch Bj1+And Bj2-When the power supply is disconnected, current flows out from the end B of the inductor L and sequentially passes through the power switch Bj2+Power switch Bj1+Body diode and battery BjPower switch Bj1-Power switch Bj2-Then flows to the A end of the inductor L, thereby forming a j charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the j charging loopjIs a storage battery BjCharging;
wherein j is 4, 5, …, n.
The above embodiment, when the battery BjThe residual electric quantity is higher, and the power switch B is controlledj1+And Bj2-Conducting, power switch Bj2+、Bj1-Turning off the battery B through the jth discharge circuitjThe electric energy of the inductor L is transferred to the inductor L, and other storage batteries with lower electric quantity can absorb the stored energy of the inductor L; when the battery BjWhen the residual electric quantity is lower, the power switch B is controlledj2+、Bj1-Conducting, power switch Bj1+And Bj2-When the charging circuit is disconnected, the stored energy of the inductor L can be absorbed through the jth charging loop, and the stored energy of other storage batteries with higher electric quantity can be stored into the inductor L.
As shown in FIG. 11, a battery B according to a seventh embodiment of the present inventionjPower switch B(j+1)1+Power switch B(j+1)2B, power switch(j-1)1-Power switch B(j-1)2-The inductor L forms a jth charging and discharging loop;
when the power switch B(j-1)1-And do B(j+1)2+Conducting, power switch B(j-1)2-And B(j+1)1+When turned off, the current is supplied to the storage battery BjFlows out of the positive pole and passes through the power switch B(j-1)1-Power switch B(j-1)2-Body diode, inductor L and power switch B(j+1)2+Power switch B(j+1)1+Body diode of (2) backward flow to battery (B)jThereby forming a j-th discharge circuit through which the secondary battery B passesjThe electric energy is gradually transferred to the inductor L to store energy for the inductor L.
When the power switch B(j-1)2-And B(j+1)1+Conducting, power switch B(j-1)1-And do B(j+1)2+When the power supply is turned off, current flows out from the end A of the inductor L and sequentially passes through the power switch B(j-1)2-Power switch B(j-1)1-Body diode, storage battery Bj and power switch B(j+1)1+Power switch B(j+1)2+Then flows to the B end of the inductor L, thereby forming a j charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the j charging loopjIs a storage battery BjAnd (6) charging.
The above embodiment, when the battery BjThe residual electric quantity is higher, and the power switch B is controlled(j-1)1-And do B(j+1)2+Conducting, power switch B(j-1)2-And B(j+1)1+Turning off the battery B through the jth discharge circuitjThe electric energy of the inductor L is transferred to the inductor L, and other storage batteries with lower electric quantity can absorb the stored energy of the inductor L; when the battery BjWhen the residual electric quantity is lower, the power switch B is controlled(j-1)2-And B(j+1)1+Conducting, power switch B(j-1)1-And do B(j+1)2+And when the charging is turned off, the stored energy of the inductor L can be absorbed through the jth charging loop, and the stored energy of other storage batteries with higher electric quantity can be stored into the inductor L.
Preferably, the topology circuit further comprises an electric quantity monitoring device for monitoring the electric quantity of each storage battery in the storage battery pack and a power switch control device for controlling the on-off of the power switch, the electric quantity monitoring device is connected with the power switch control device and is used for transmitting the monitored electric quantity information of each storage battery to the power switch control device, and the power switch control device is used for controlling the on-off of the corresponding power switch according to the electric quantity information of each storage battery.
In the embodiment, the voltage and the current of the storage battery can be monitored in real time, the residual electric quantity of the storage battery is calculated, the automatic balancing control strategy of the storage battery pack is determined according to the residual electric quantity or the voltage, and the on-off state and the working sequence of the power switch are determined according to the automatic balancing strategy, so that the energy transfer between any storage batteries is realized, and the automatic balancing of the bidirectional storage battery pack is further realized. For example, the average electric quantity of all storage batteries is calculated through the residual electric quantity of the storage batteries, the storage batteries higher than the average electric quantity are combined with the charging and discharging circuit, and the corresponding storage batteries form corresponding discharging loops by controlling the on-off of the corresponding power switches to store energy to the inductor L; and the storage battery lower than the average electric quantity is combined with the charging and discharging circuit, and the corresponding storage battery forms a corresponding charging loop by controlling the on-off of the corresponding power switch so as to absorb the stored energy of the inductor L.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (9)

1. A novel rapid equalization topological circuit applied to a storage battery pack is characterized by comprising the storage battery pack, a first power switch group, a second power switch group and an inductor L;
the storage battery pack comprises storage batteries B connected in series in sequence1，B2，…，BnAccumulator B1Negative electrode of (2) is connected with a storage battery B2Positive electrode of (1), secondary battery B2Negative electrode of (2) is connected with a storage battery B3The positive pole of (1), analogizing in turn, the storage battery Bn-1Negative electrode of (2) is connected with a storage battery BnThe positive electrode of (1);
the first power switch group consists of a power switch B21-，B31-，…，Bn1-And a power switch B22-，B32-，…，Bn2-Composition is carried out; the second power switch group comprises a power switch B11+，B21+，…，Bn1+And a power switch B42+，B52+，…，Bn2+；
Wherein, the power switch B22-，B32-，…，Bn2-Common drain connected to the A terminal of the inductor L, and power switch B22-，B32-，…，Bn2-Respectively with a power switch B21-，B31-，…，Bn1-Source connection of, power switch B21-，B31-，…，Bn1-Respectively with the storage battery B2，B3，…，BnThe negative electrode of (1) is connected;
wherein, the power switch B11+Drain electrode of (2) and battery B1Is connected to the positive pole of the power switch B11+Is connected with the A end of an inductor L, and a power switch B21+，B31+，…，Bn1+Drain electrodes of the two electrodes are connected to a storage battery B2，B3，…，BnThe positive electrode of (1) is connected; power switch B21+And B31+The source electrodes of the two-way switch are connected with the end B of an inductor L, and a power switch B41+，B51+，…，Bn1+Respectively with a power switch B42+，B52+，…，Bn2+Source connection of, power switch B42+，B52+，…，Bn2+Is connected to the B terminal of the inductor L.
2. The new fast equalization topology circuit applied to battery pack as claimed in claim 1, wherein said power switch is an insulated gate bipolar transistor or MOSFET transistor.
3. The new fast equalization topology circuit applied to battery packs as claimed in claim 1, characterized in that battery B1Power switch B11+Power switch B21+Is connected in series with an inductor L to form a 1 st chargerA discharge loop;
when the power switch B11+Conducting and power switch B21+When turned off, the current is supplied to the storage battery B1Flows out of the positive pole and passes through the power switch B11+Inductor L and power switch B21+Body diode of (2) backward flow to battery (B)1Thereby forming a 1 st discharge circuit through which the battery B passes1The electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch B11+Switch-off, power switch B21When the inductor L is switched on, the current flows out from the end A of the inductor L and sequentially passes through the rate switch B11+Body diode and battery B1Power switch B21+Then flows to the end B of the inductor L, thereby forming a 1 st charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the loop1Is a storage battery B1And (6) charging.
4. The new fast equalization topology circuit applied to battery packs as claimed in claim 1, characterized in that battery B2Power switch B21+Power switch B22-Power switch B21-And an inductor L form a 2 nd charging and discharging loop;
when the power switch B21+And B22-Conducting, power switch B21-When turned off, the current is supplied to the storage battery B2Flows out of the positive pole and passes through the power switch B21+Inductor L and power switch B22-Power switch B21-Body diode of (2) backward flow to battery (B)2Thereby forming a 2 nd discharge circuit through which the battery B passes2The electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch B21-Conducting, power switch B21+And B22-When the power switch is turned off, the current flows out from the end B of the inductor L and sequentially passes through the power switch B21+Body diode and battery B2Power switch B21-Power switch B22-Then flows to the a terminal of the inductor L, thereby forming a 2 nd charging loop through whichThe energy of the inductor L is gradually transferred to the storage battery B2Is a storage battery B2And (6) charging.
5. The new fast equalization topology circuit applied to battery packs as claimed in claim 1, characterized in that battery B3Power switch B31+Power switch B32-Power switch B31-And an inductor L form a 3 rd charge-discharge loop;
when the power switch B31+And B32-Conducting, power switch B31-When turned off, the current is supplied to the storage battery B3Flows out of the positive pole and passes through the power switch B31+Inductor L and power switch B32-And a power switch B31-To the battery B3Thereby forming a 3 rd discharge circuit through which the secondary battery B passes3The electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch B31-Conducting, power switch B31+And B32-When the power switch is turned off, the current flows out from the end B of the inductor L and sequentially passes through the power switch B31+Body diode and battery B3Power switch B31-Power switch B32-Then flows to the a terminal of the inductor L, thereby forming a 3 rd charging loop through which the energy of the inductor L is gradually transferred to the battery B3Is a storage battery B3And (6) charging.
6. The new fast equalization topology circuit applied to battery packs as claimed in claim 1, characterized in that battery B3Power switch B21-Power switch B22-Power switch B41+Power switch B42+And an inductor L form a 3 rd charge-discharge loop;
when the power switch B21-And do B42+Conducting, power switch B22-And B41+When turned off, the current is supplied to the storage battery B3Flows out of the positive pole and passes through the power switch B21-Power switch B22-Body diode of, and electricityInductor L and power switch B42+Power switch B41+Body diode of (2) backward flow to battery (B)3Thereby forming a 3 rd discharge circuit through which the secondary battery B passes3The electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch B22-And B41+Conducting, power switch B21-And do B42+When the power supply is turned off, current flows out from the end A of the inductor L and sequentially passes through the power switch B22-Power switch B21-Body diode and battery B3Power switch B41+Power switch B42+Then flows to the end B of the inductor L, thereby forming a 3 rd charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the loop3Is a storage battery B3And (6) charging.
7. The new fast equalization topology circuit applied to battery packs as claimed in claim 1, characterized in that battery BjPower switch Bj1+Power switch Bj2+Power switch Bj1-Power switch Bj2-The inductor L forms a jth charging and discharging loop;
when the power switch Bj1+And Bj2-Conducting, power switch Bj2+、Bj1-When turned off, the current is supplied to the storage battery BjFlows out of the positive pole and passes through the power switch Bj1+Power switch Bj2+Body diode and power switch Bj2-Power switch Bj1-Body diode of (2) backward flow to battery (B)jThereby forming a j-th discharge circuit through which the secondary battery B passesjThe electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch Bj2+、Bj1-Conducting, power switch Bj1+And Bj2-When the power supply is disconnected, current flows out from the end B of the inductor L and sequentially passes through the power switch Bj2+Power switch Bj1+Body diode and battery BjPower switch Bj1-Power switch Bj2-Backward flow direction of the body diodeTerminal A of inductor L, thereby forming a j charging loop, through which the energy of inductor L is gradually transferred to storage battery BjIs a storage battery BjCharging;
wherein j is 4, 5, …, n.
8. The new fast equalization topology circuit applied to battery packs as claimed in claim 1, characterized in that battery BjPower switch B(j+1)1+Power switch B(j+1)2B, power switch(j-1)1-Power switch B(j-1)2-The inductor L forms a jth charging and discharging loop;
when the power switch B(j-1)1-And do B(j+1)2+Conducting, power switch B(j-1)2-And B(j+1)1+When turned off, the current is supplied to the storage battery BjFlows out of the positive pole and passes through the power switch B(j-1)1-Power switch B(j-1)2-Body diode, inductor L and power switch B(j+1)2+Power switch B(j+1)1+Body diode of (2) backward flow to battery (B)jThereby forming a j-th discharge circuit through which the secondary battery B passesjThe electric energy is gradually transferred to the inductor L to store energy for the inductor L;
when the power switch B(j-1)2-And B(j+1)1+Conducting, power switch B(j-1)1-And do B(j+1)2+When the power supply is turned off, current flows out from the end A of the inductor L and sequentially passes through the power switch B(j-1)2-Power switch B(j-1)1-Body diode, storage battery Bj and power switch B(j+1)1+Power switch B(j+1)2+Then flows to the B end of the inductor L, thereby forming a j charging loop, and the energy of the inductor L is gradually transferred to the storage battery B through the j charging loopjIs a storage battery BjAnd (6) charging.
9. The novel fast equalization topology circuit applied to the storage battery pack according to claim 1, characterized in that; the topology circuit further comprises an electric quantity monitoring device for monitoring the electric quantity of each storage battery in the storage battery pack and a power switch control device for controlling the on-off of the power switch, wherein the electric quantity monitoring device is connected with the power switch control device and used for transmitting the monitored electric quantity information of each storage battery to the power switch control device, and the power switch control device is used for controlling the on-off of the corresponding power switch according to the electric quantity information of each storage battery.
CN201922458817.4U 2019-12-31 2019-12-31 Novel rapid equalization topological circuit applied to storage battery pack Active CN212473174U (en)

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CN201922458817.4U CN212473174U (en) 2019-12-31 2019-12-31 Novel rapid equalization topological circuit applied to storage battery pack

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Application Number Priority Date Filing Date Title
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