CN204732920U - Lithium battery active equalization control device - Google Patents
Lithium battery active equalization control device Download PDFInfo
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- CN204732920U CN204732920U CN201520419242.4U CN201520419242U CN204732920U CN 204732920 U CN204732920 U CN 204732920U CN 201520419242 U CN201520419242 U CN 201520419242U CN 204732920 U CN204732920 U CN 204732920U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a kind of lithium battery active equalization control device, relate to technical field of lithium batteries; Comprise DC/DC power module and main control unit, described DC/DC power module is connected with described main control unit; It is characterized in that: described main control unit respectively with lithium battery active equalization module, voltage detection module, current detection module is connected with display module.What the utility model can solve that existing lithium battery equalization scheme exists is not easy to the more problem of modularization, device.
Description
Technical field
The utility model relates to technical field of lithium batteries; Especially a kind of lithium battery active equalization control device of the lithium battery equilibrium based on SOC.
Background technology
Along with the development of lithium battery technology and each side that is subject to of energy-conserving and environment-protective are more and more paid attention to, the application of lithium battery is more and more wide, as new energy fields such as portable type electronic product, electric automobile and solar power systems.Lithium ion battery is the storage battery that energy Ratios is the highest so far, and its weight/power ratio reaches 130 hours watts of per kilograms, cell discharge voltage 3.6 volts, all high than ickel-cadmium cell three times.In addition, lithium ion battery has thermal effect little, memory-less effect, charge efficiency than cadmium nickel and Ni-H cell high.But, because its discharge voltage is not high, need in a lot of application scenario many Battery packs to connect and use, to reach enough output voltages and power output.Inconsistent owing to existing between each cell in battery pack, after continuous print charge and discharge cycles, the state-of-charge of each cell there will be serious imbalance, and the voltage shown as between cell is dispersed increasing, and this will cause permanent damage to battery.
The state-of-charge of battery is (English: State of Charge, be called for short SOC) important parameter when running as electric automobile, it is accurately estimated can provide necessary Data support for battery management system and remaining mileage prediction, and then effectively prevent over-charging of battery, cross put, extending battery life, reduces the operating cost of electric automobile.
At present, equalizing circuit for lithium battery circuit from balancing procedure, to the Expenditure Levels of energy, can be divided into energy-dissipating and energy non-dissipative type.The shortcoming of energy-dissipating is that efficiency is low, and the electric current of uncontrollable shunting.For the equalization scheme of energy non-dissipative type, what domestic employing was more is switching capacity method and DC-DC converter method.The shortcoming of switching capacity method is that reliability is not strong, can only realize electric voltage equalization, cannot accomplish that state-of-charge is balanced, and time for balance be long.And DC-DC converter scheme has multiple topology, the more scheme of current application can be divided into centralized transformer method and distributed equalization.Centralized transformer method is transferred energy in the minimum battery of voltage by the transformer of a multi output.The shortcoming of the equalization of this structure is not easy to modularization.Distributed structure is an equalizing circuit in parallel at each battery cell two ends, and belong to discharge type equilibrium, the battery that namely energy is too high is to whole battery pack or all the other some battery discharges, and be characterized in being easy to modularization, weak point is that device is more.
Summary of the invention
The purpose of this utility model is to provide a kind of lithium battery active equalization control device, and what it can solve that existing lithium battery equalization scheme exists is not easy to the more problem of modularization, device.
In order to solve the problem, the technical solution adopted in the utility model is: this lithium battery active equalization control device, comprises DC/DC power module and main control unit, and described DC/DC power module is connected with described main control unit; Described main control unit respectively with lithium battery active equalization module, voltage detection module, current detection module is connected with display module.
In technique scheme, more specifically scheme can also be: described lithium battery active equalization module comprises voltage stabilizing treatment circuit and isolation DC/DC circuit; The input of described voltage stabilizing treatment circuit receives carries the voltage signal of coming from serial lithium battery group, and its first output is connected with described input of isolating DC/DC circuit, and its second output is connected with the second input of inverter; The output of described isolation DC/DC circuit is connected with the second input of high speed photo coupling buffer circuit, the output of described high speed photo coupling buffer circuit is connected with the first input end of described inverter, the output of described inverter is connected with the input of switching circuit, the output of described switching circuit is connected with the input of energy storage inductor circuit, and the output of described energy storage inductive circuit is connected with described serial lithium battery group; The first input end of high speed photo coupling buffer circuit receives the control signal of main control unit.
Further: described main control unit is TMS320F28335 digital signal processor; Described voltage stabilizing treatment circuit is 12 volts of voltage stabilizing treatment circuits; Described isolation DC/DC circuit is 12 volts and turns 5 volts of isolation DC/DC circuit.
Further: described inverter is 74HC04 inverter.
Owing to have employed technique scheme, the utility model compared with prior art, the beneficial effect had is: owing to being provided with lithium battery active equalization module in the utility model, buck accumulator is provided with in lithium battery active equalization module, it is as the carrier of Energy Transfer, energy can be transferred to inductance by the battery that state-of-charge is high, then transfer to the low battery of state-of-charge from inductance, to realize the flowing of energy.
Accompanying drawing explanation
Fig. 1 is block diagram of the present utility model.
Fig. 2 is the block diagram of lithium battery active equalization module.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Lithium battery active equalization control device shown in Fig. 1 and Fig. 2, comprises DC/DC power module 1 and main control unit 2, DC/DC power module 1 is connected with main control unit 2; Main control unit 2 respectively with lithium battery active equalization module 3, voltage detection module 5, current detection module 6 is connected with display module 4.
Wherein, the detection of the voltage and current of lithium battery is undertaken by main control unit 2 control voltage detection module 5 and current detection module 6; The computing of Unscented kalman filtering (Uncented Kalman Filter is called for short UKF) algorithm is completed by main control unit 2; The control of active equalization controls lithium battery active equalization module 3 by main control unit 2 and completes; The average state-of-charge of battery pack (state-of-charge is called for short SOC) and batteries monomer battery pressure reduction maximum are shown by display module 4.
Lithium battery active equalization module 3 comprises voltage stabilizing treatment circuit 3-1 and isolation DC/DC circuit 3-2; The input of voltage stabilizing treatment circuit 3-1 receives carries the voltage signal of coming from serial lithium battery group, and its first output is connected with the input of isolation DC/DC circuit 3-2, and its second output is connected with second input of inverter 3-4; The output of isolation DC/DC circuit 3-2 is connected with second input of high speed photo coupling buffer circuit 3-3, the output of high speed photo coupling buffer circuit 3-3 is connected with the first input end of inverter 3-4, the output of inverter 3-4 is connected with the input of switching circuit 3-5, the output of switching circuit 3-5 is connected with the input of energy storage inductor circuit 3-6, and the output of energy storage inductor circuit 3-6 is connected with serial lithium battery group; The first input end of high speed photo coupling buffer circuit 3-3 receives the control signal of main control unit 2.
In the present embodiment, main control unit 2 is TMS320F28335 digital signal processor; Voltage stabilizing treatment circuit 3-1 is 12 volts of voltage stabilizing treatment circuits; Isolation DC/DC circuit 3-2 is 12 volts and turns 5 volts of isolation DC/DC circuit; Inverter 3-4 is 74HC04 inverter.
The terminal voltage of serial lithium battery group is carried out voltage stabilizing by 12V voltage stabilizing treatment circuit 3-1, provides power supply to give 74HC04 inverter 3-4; It is that the voltage utilizing 12V voltage stabilizing treatment circuit 3-1 to export is changed that 12V turns 5V isolation DC/DC circuit 3-2, the output voltage of isolation is provided, with give high speed photo coupling buffer circuit 3-3 power supply is provided, and for the MOSFET inside switching circuit 3-5 S end reference potential is provided; The duty ratio of the PWM that main control unit 2 exports by high speed photo coupling buffer circuit 3-3 carries out isolation and amplifier, for MOSFET provides driving voltage, plays the effect of insulation blocking main control unit 2 simultaneously; The effect of 74HC04 inverter 3-4 is: because the output of the output of high speed photo coupling buffer circuit 3-3 and the PWM duty ratio of main control unit 2 is reverse, the output of forward can be obtained through 74HC04 inverter 4, make the PWM duty ratio of main control unit 2 and the unlatching of MOSFET be synchronous; Switching circuit 3-5 is made up of MOSFET and diode, and by the switch of control MOSFET and the flow direction of controllable current and size, wherein diode is the effect playing oppositely cut-off, avoids energy adverse current; The effect of energy storage inductor circuit 3-6 is: energy storage inductor circuit 3-6 is as the carrier of Energy Transfer, energy is transferred to inductance by the battery that state-of-charge is high, the low battery of state-of-charge is transferred to again from inductance, to realize the flowing of energy, energy storage inductor has been connected the two-way twin zener dioder of transient state, with the impact avoiding momentary pulse to cause circuit.
The utility model is applicable to the Balance route of serial lithium battery group, the utility model is accessed serial lithium battery group, can to the voltage of batteries each in serial lithium battery group, electric current gathers, and real-time estimation goes out the SOC of each batteries, take SOC as basis for estimation, carry out energy trasfer formula active equalization, equalizing system is started when the difference of certain batteries monomer SOC and the average SOC of serial lithium battery group reaches 2% in serial lithium battery group, by the energy trasfer of battery high for SOC in serial lithium battery group to the low battery of SOC, until in serial lithium battery group the SOC difference of each batteries all within 2%, the average SOC of serial lithium battery group and voltage of single battery in series lithium battery pack difference maximum are shown by display module 4.
Claims (3)
1. a lithium battery active equalization control device, comprises DC/DC power module and main control unit, and described DC/DC power module is connected with described main control unit; It is characterized in that: described main control unit respectively with lithium battery active equalization module, voltage detection module, current detection module is connected with display module;
Described lithium battery active equalization module comprises voltage stabilizing treatment circuit and isolation DC/DC circuit; The input of described voltage stabilizing treatment circuit receives carries the voltage signal of coming from serial lithium battery group, and its first output is connected with described input of isolating DC/DC circuit, and its second output is connected with the second input of inverter; The output of described isolation DC/DC circuit is connected with the second input of high speed photo coupling buffer circuit, the output of described high speed photo coupling buffer circuit is connected with the first input end of described inverter, the output of described inverter is connected with the input of switching circuit, the output of described switching circuit is connected with the input of energy storage inductor circuit, and the output of described energy storage inductive circuit is connected with described serial lithium battery group; The first input end of described high speed photo coupling buffer circuit receives the control signal of described main control unit.
2. lithium battery active equalization control device according to claim 1, is characterized in that: described main control unit is TMS320F28335 digital signal processor; Described voltage stabilizing treatment circuit is 12 volts of voltage stabilizing treatment circuits; Described isolation DC/DC circuit is 12 volts and turns 5 volts of isolation DC/DC circuit.
3. lithium battery active equalization control device according to claim 1 and 2, is characterized in that: described inverter is 74HC04 inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520419242.4U CN204732920U (en) | 2015-06-17 | 2015-06-17 | Lithium battery active equalization control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520419242.4U CN204732920U (en) | 2015-06-17 | 2015-06-17 | Lithium battery active equalization control device |
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| CN204732920U true CN204732920U (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520419242.4U Expired - Fee Related CN204732920U (en) | 2015-06-17 | 2015-06-17 | Lithium battery active equalization control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186590A (en) * | 2015-06-17 | 2015-12-23 | 广西科技大学 | Active lithium battery balance control device |
| CN114301143A (en) * | 2022-01-06 | 2022-04-08 | 南京工程学院 | Battery pack electric quantity equalization system based on Internet of things |
-
2015
- 2015-06-17 CN CN201520419242.4U patent/CN204732920U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186590A (en) * | 2015-06-17 | 2015-12-23 | 广西科技大学 | Active lithium battery balance control device |
| CN114301143A (en) * | 2022-01-06 | 2022-04-08 | 南京工程学院 | Battery pack electric quantity equalization system based on Internet of things |
| CN114301143B (en) * | 2022-01-06 | 2024-04-05 | 南京工程学院 | Battery pack electric quantity balancing system based on Internet of things |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20160617 |