CN208479210U - Three-phase inversion charge/discharge control circuit based on battery pack H bridge cascaded structure - Google Patents
Three-phase inversion charge/discharge control circuit based on battery pack H bridge cascaded structure Download PDFInfo
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- CN208479210U CN208479210U CN201820793014.7U CN201820793014U CN208479210U CN 208479210 U CN208479210 U CN 208479210U CN 201820793014 U CN201820793014 U CN 201820793014U CN 208479210 U CN208479210 U CN 208479210U
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- battery
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- phase inversion
- single battery
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Abstract
The utility model discloses a kind of three-phase inversion charge/discharge control circuit based on battery pack H bridge cascaded structure, has the three-phase inversion charge/discharge control circuit of battery protection and active equalization function.The circuit design can carry out control of discharge to each single battery (or single battery group) by controlling the guiding path of electric current.By bus positive and negative electrode, and increase medium voltage point tap, can realize that three-phase inversion discharges by PWM switch modulation.The circuit design can realize active equalization ability identical with discharge current size.It is controlled by dynamic, each single battery (or single battery group) in battery pack, which can reach, to be substantially discharged.
Description
Technical field
The utility model relates to field of batteries.
Background technique
New energy technology is fast-developing, especially lithium battery the fields such as standby energy storage and electric car extensive use,
Requirements at the higher level are proposed to crucial battery energy storage and battery management technique, need to be promoted the validity and equilibrium to battery power discharge
Ability performs to the energy storage characteristic of battery pack most preferably.In the inversion output application of battery pack, except battery management system also needs to increase
Add inverter circuit just and inversion electric discharge can be achieved.System architecture is complicated, and hardware cost is high.
Battery pack packet technology has high requirement to the consistency of single battery, otherwise because of the serious shadow of battery consistency problem
Ring the performance of battery pack overall performance.But it is limited by battery technology, needs to solve battery one by better battery management technique
Cause property problem reduces battery pack packet to the coherence request of single battery.
There is the problems such as low efficiency, practical application effect is undesirable in current passive balanced and active equalization technology.It is special
It is not active equalization technology, including capacitor degree of flying method, voltage transformation approach, circuit is extremely complex, hardware volume is big, application cost is high
The defects of.It needs better battery management technique and promotes application level.
The performance of entire battery pack is limited by single battery failure or the influence of quality problems.Need better cell tube
The reliability and safety of reason technology raising battery applications.
Utility model content
Technical problem to be solved in the utility model is to realize a kind of battery pack H bridge cascaded structure, has battery protection
With the three-phase inversion charge/discharge control circuit of active equalization function.
To achieve the goals above, the technical solution adopted in the utility model are as follows: three based on battery pack H bridge cascaded structure
Phase inversion charge/discharge control circuit, battery pack are made of the battery unit being serially connected, and each battery unit is equipped with a H bridge group
Part, the H axle assemble by first switching element, second switch element, third switch element and the 4th switch element successively head and the tail
It is connected and constitutes, the anode of the battery unit is linked between second switch element and the 4th switch element, the battery unit
Cathode be linked between first switching element and third switch element, between the third switch element and the 4th switch element
First electrode and other battery cells in series of the extracting power supply cord as the battery unit, the first switching element and second are opened
Second electrode and other battery cells in series of the extracting power supply cord as the battery unit between element are closed, each battery unit
First electrode is connect with the second electrode of another battery unit, wherein the first electrode for being located at the battery unit of head end connects electricity
The A phase power supply interface of pond group, it is concatenated positioned at the B phase power supply interface of the second electrode connection battery pack of the battery unit of end
The extraction wire of the medium voltage point of battery unit connects C phase power supply interface；
Battery pack is divided into AC stacks of cells and CB stacks of cells, AC stacks of cells and CB electricity by medium voltage point
The battery unit quantity of cell stack is identical, to guarantee that every phase supply voltage is identical.
The three-phase inversion charge/discharge control circuit is equipped with PWM modulation signal output unit, and the PWM modulation signal output is single
Member outputs control signals to each switch element.
The three-phase inversion charge/discharge control circuit be equipped with battery management unit, the first electrode of each battery unit and
Second electrode is equipped with voltage acquisition unit, and each voltage acquisition unit outputs voltage signal to battery management unit, and
PWM modulation signal output unit is output control signals to, PWM modulation signal output unit control switch element switch shape is passed through
State.
Control method based on three-phase inversion charge/discharge control circuit:
Battery pack is divided into AC stacks of cells and CB stacks of cells by medium voltage point；
PWM modulation signal output unit control switch element switch state AC stacks of cells and CB stacks of cells are with phase
With frequency act (such as 50Hz frequently changes the current direction of power supply with this frequency), remain AC stacks of cells and
CB stacks of cells powers direction on the contrary, i.e.；
When the first switching element of AC stacks of cells and the 4th switch element are closed, second switch element and third are switched
When element disconnects, the first switching element of CB stacks of cells and the 4th switch element are disconnected, and second switch element and third are opened
Close element closure；
When the first switching element of AC stacks of cells and the 4th switch element disconnect, second switch element and third are switched
When element is closed, the first switching element of CB stacks of cells and the 4th switch element closure, second switch element and third are opened
Element is closed to disconnect.
When detecting higher some or multiple battery cell voltages or abnormal state (such as temperature is excessively high), then packet is controlled
Include that voltage is higher or abnormal state battery unit in even numbers number battery unit disconnected from power supply state, make AC battery unit
Group is identical with the battery unit of power supply state is in CB stacks of cells, remains the every phase output voltage phase of three-phase alternating current
Together；
The control method disconnected from power supply state: the first switching element and third switch element for controlling battery unit are closed
It closes, second switch element and the 4th switch element disconnect；Or control the first switching element and third switch of the battery unit
Element disconnects, second switch element and the 4th switch element closure.
Utility model has the advantages that
1, tandem compound can be added in single battery (or single battery group), tandem compound can also be bypassed out completely.It can be with
Discharge current is controlled with or without any single battery (or single battery group), that is, can reach euqalizing current and be equal to electric discharge electricity
The high efficiency of stream is balanced.
2, by bus positive and negative electrode, and increase medium voltage point tap, as three-phase power output end mouth.According to three-phase
Inversion control mechanism participates in the H-bridge circuit of electric discharge output, it can be achieved that three-phase by all bus structures that seal in of PWM switch modulation
Inversion electric discharge.Inverter output voltage is connected the superposition of series between every grade of inverter voltage and port.Cancel additional three-phase inversion
Device module.
3, needed for nominal discharge voltage on the basis of battery strings number, increase a section or more piece single battery (or monomer electricity
Pond group) as balanced redundancy.The single battery (or single battery group) of discharge prevention or active equalization can be accomplished to bypass into
When, battery power discharge voltage is normal.Each single battery (or single battery group), which can reach, to be substantially discharged, and battery pack is made
Energy storage characteristic performs to most preferably, and independent of the coherence request to single battery.
4, each single battery (or single battery group) is used only what field-effect tube, relay or other switching devices were built
H-bridge circuit is controlled as turn-on and turn-off, be can be realized and is sealed in or Bypass Control, and simple circuit, control is simple, low in cost.
5, failure or quality problems especially are occurred to single battery (or single battery group), can bypassed completely in tandem compound
Outside, the reliability and safety of battery pack application are provided.
Detailed description of the invention
The content of width attached drawing every in the utility model specification expression is briefly described below:
Fig. 1 is the three-phase inversion charge/discharge control circuit schematic diagram based on battery pack H bridge cascaded structure.
Specific embodiment
Three-phase inversion charge/discharge control circuit based on battery pack H bridge cascaded structure uses battery pack H bridge cascaded structure, has
The three-phase inversion charge/discharge control circuit of battery protection and active equalization function.The circuit design can pass through the guiding path of control electric current
Diameter carries out control of discharge to each single battery (or single battery group).By bus positive and negative electrode, and increase medium voltage point pumping
Head can realize that three-phase inversion discharges by PWM switch modulation.The circuit design can realize active identical with discharge current size
The ability of equalization.It is controlled by dynamic, each single battery (or single battery group) in battery pack, which can reach, to be substantially discharged.
Each single battery (or single battery group) in battery pack passes through field-effect tube, relay or other switching devices
The H-bridge circuit built carries out on-off control, and H bridge output end connects battery pack series bus.By H-bridge circuit by single battery
(or single battery group) seals in bus, or single battery (or single battery group) is bypassed out tandem compound.It is positive and negative by bus
Pole, and increase medium voltage point tap, as three-phase power output end mouth, it can realize that three-phase inversion is put by PWM switch modulation
Electricity.
Single battery (or single battery group) connects battery pack series bus, Sx_4 (the 4th switch member by H bridge output end
Part), Sx_1 (first switching element) switch conduction realize the output of cell voltage forward direction, Sx_2 (second switch element), Sx_3 (the
Three switch elements) switch conduction realize cell voltage reversely export, this grade of single battery (or single battery group) seals in bus, lead to
Cross bus current.Sx_2, Sx_4 switch conduction or Sx_1, Sx_3 switch conduction, then be shorted series bus, this grade of single battery
(or single battery group) bypasses out tandem compound, does not pass through bus current.
By bus positive and negative electrode, and increase medium voltage point tap, i.e. tri- terminal positions of A, B, C of respective figure are
Three-phase power output end mouth.According to three-phase inversion control mechanism, electric discharge is participated in by all bus structures that seal in of PWM switch modulation
The H-bridge circuit of output is, it can be achieved that three-phase inversion discharges.Inverter output voltage is connected series between every grade of inverter voltage and port
Superposition.
Specific structure:
Directly series connection does not form battery pack to single battery (or single battery group) positive and negative electrode, but by field-effect tube, after
The H-bridge circuit that electric appliance or other switching devices are built carries out on-off control, and H bridge output end connects battery pack series bus.Pass through
The conducting connection of H-bridge circuit is controlled, this grade of single battery (or single battery group) can seal in bus forward or backwards.
Single battery (or single battery group) can be by field-effect tube, relay or other switching devices are built H bridge electricity
Road carries out on-off control, and H bridge output end connects battery pack series bus.By controlling H-bridge circuit for bus short join, this grade of monomer
Battery (or single battery group) then bypasses out tandem compound.
By bus positive and negative electrode, and increase medium voltage point tap, as three-phase power output end mouth.According to three contraries
Become control mechanism, participates in the H-bridge circuit of electric discharge output, it can be achieved that three contraries by all bus structures that seal in of PWM switch modulation
Become electric discharge.Inverter output voltage is connected the superposition of series between every grade of inverter voltage and port.
Voltage and status information of the discharge process according to each single battery (or single battery group), normal single battery
(or single battery group) can be sealed in bus by H-bridge circuit and carry out electric discharge connection.Abnormal single battery (or single battery group)
Can be by H-bridge circuit by this grade of bus conducting connection, this grade of cell bypass goes out tandem compound, obstructed overdischarge electric current.Voltage is inclined
Low single battery (or single battery group) can also reversely be sealed in by H-bridge circuit bus carry out charging connection, it is more efficient into
Row active equalization.
Discharge process is according to the voltage and status information of each single battery (or single battery group), and real-time control adjustment is respectively
The H bridge connection status of a single battery (or single battery group) realizes discharge prevention and active equalization.It is controlled by dynamic, electricity
Each single battery (or single battery group) in the group of pond, which can reach, puts a point electric discharge.
Discharge process is equal to discharge current to the euqalizing current of each single battery (or single battery group).Can also pass through by
Single battery (or single battery group) does charging connection, more efficient carry out active equalization.
Battery pack packet technology and three-phase inversion output function based on the circuit structure.
By the utility model technology, requirement of the battery pack packet to single battery consistency can be substantially reduced.
By the utility model technology, battery management circuit can realize three-phase inversion electric discharge by PWM switch modulation.
By the utility model technology, it can realize that electric discharge is protected to each single battery (or single battery group) in battery pack
Shield and active equalization.Each single battery (or single battery group), which can reach, to be substantially discharged.
By the utility model technology, the single battery (or single battery group) that problem can will be present thoroughly excludes connecting
Combination is outer, and the use of battery pack will not be influenced because of the damage of individual monomers battery (or single battery group), greatly improves system
Safety and reliability.
Three-phase inversion control of discharge logic:
By bus positive and negative electrode, and increase medium voltage point tap, as three-phase power output end mouth.According to three contraries
Become control mechanism, participates in the H-bridge circuit of electric discharge output, it can be achieved that three contraries by all bus structures that seal in of PWM switch modulation
Become electric discharge.Single battery (or single battery group) number of dynamic adjustment output electric discharge, makes the variation of output voltage meet three-phase
The voltage requirement of inversion output.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, as long as the various unsubstantialities carried out using the method concept and technical solution of the utility model change
Into, or it is not improved the conception and technical scheme of the utility model are directly applied into other occasions, in the utility model
Protection scope within.
Claims (3)
1. based on the three-phase inversion charge/discharge control circuit of battery pack H bridge cascaded structure, battery pack is by the battery unit that is serially connected
It constitutes, it is characterised in that: each battery unit is equipped with a H axle assemble, and the H axle assemble is opened by first switching element, second
Close element, third switch element and the 4th switch element successively join end to end composition, the anode of the battery unit is linked into the
Between two switch elements and the 4th switch element, the cathode of the battery unit is linked into first switching element and third switch member
Between part, between the third switch element and the 4th switch element extracting power supply cord as the battery unit first electrode with
Other battery cells in series, extracting power supply cord is as the battery unit between the first switching element and second switch element
Second electrode and other battery cells in series, the first electrode of each battery unit and the second electrode of another battery unit connect
It connects, wherein being located at the A phase power supply interface of the first electrode connection battery pack of the battery unit of head end, the battery unit positioned at end
Second electrode connection battery pack B phase power supply interface, the extraction wire of the medium voltage point of concatenated battery unit connects C phase
Power supply interface.
2. three-phase inversion charge/discharge control circuit according to claim 1, it is characterised in that: the three-phase inversion control of discharge
Circuit has PWM modulation signal output unit, and the PWM modulation signal output unit outputs control signals to each switch member
Part.
3. three-phase inversion charge/discharge control circuit according to claim 2, it is characterised in that: the three-phase inversion control of discharge
Circuit is equipped with battery management unit, and the first electrode and second electrode of each battery unit are equipped with voltage acquisition unit,
Each voltage acquisition unit outputs voltage signal to battery management unit, and it is defeated to output control signals to PWM modulation signal
Unit out passes through PWM modulation signal output unit control switch element switch state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820793014.7U CN208479210U (en) | 2018-05-25 | 2018-05-25 | Three-phase inversion charge/discharge control circuit based on battery pack H bridge cascaded structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820793014.7U CN208479210U (en) | 2018-05-25 | 2018-05-25 | Three-phase inversion charge/discharge control circuit based on battery pack H bridge cascaded structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208479210U true CN208479210U (en) | 2019-02-05 |
Family
ID=65218621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820793014.7U Expired - Fee Related CN208479210U (en) | 2018-05-25 | 2018-05-25 | Three-phase inversion charge/discharge control circuit based on battery pack H bridge cascaded structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN208479210U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599315A (en) * | 2018-05-25 | 2018-09-28 | 李勇 | Three-phase inversion charge/discharge control circuit and its control method based on battery pack H bridge cascaded structures |
-
2018
- 2018-05-25 CN CN201820793014.7U patent/CN208479210U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599315A (en) * | 2018-05-25 | 2018-09-28 | 李勇 | Three-phase inversion charge/discharge control circuit and its control method based on battery pack H bridge cascaded structures |
| CN108599315B (en) * | 2018-05-25 | 2024-01-05 | 芜湖埃泰克汽车电子股份有限公司 | Three-phase inversion discharge control circuit based on battery H bridge series structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20190205 Termination date: 20190525 |