CN208479209U - The adjustable charge/discharge control circuit of output voltage based on battery pack H bridge cascaded structure - Google Patents
The adjustable charge/discharge control circuit of output voltage based on battery pack H bridge cascaded structure Download PDFInfo
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- CN208479209U CN208479209U CN201820792999.1U CN201820792999U CN208479209U CN 208479209 U CN208479209 U CN 208479209U CN 201820792999 U CN201820792999 U CN 201820792999U CN 208479209 U CN208479209 U CN 208479209U
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- battery
- unit
- single battery
- switch element
- electrode
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Abstract
The utility model discloses a kind of adjustable charge/discharge control circuit of output voltage based on battery pack H bridge cascaded structure, each single battery (or single battery group) in battery pack carries out on-off control by the H-bridge circuit that field-effect tube, relay or other switching devices are built, and H bridge output end connects battery pack series bus.Single battery (or single battery group) is sealed in into bus by H-bridge circuit, or single battery (or single battery group) is bypassed into out tandem compound.Single battery (or single battery group) number of output electric discharge is added by control, realizes that discharge voltage DC decompression is adjustable.
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.
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 adjustable charge/discharge control circuit of output voltage of active equalization function.
To achieve the goals above, the technical solution adopted in the utility model are as follows: based on the defeated of battery pack H bridge cascaded structure
The adjustable charge/discharge control circuit of voltage out, battery pack are made of the battery unit being serially connected, and each battery unit is equipped with a H
Axle assemble, the H axle assemble by first switching element, second switch element, third switch element and the 4th switch element successively
Join end to end composition, and the anode of the battery unit is linked between second switch element and the 4th switch element, the battery
The cathode of unit is linked between first switching element and third switch element, the third switch element and the 4th switch element
Between first electrode and other battery cells in series of the extracting power supply cord as the battery unit, the first switching element and the
Second electrode and other battery cells in series of the extracting power supply cord as the battery unit, each battery list between two switch elements
The first electrode of member 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
The first power supply interface for connecing battery pack connects the second power supply interface of battery pack positioned at the second electrode of the battery unit of end,
First power supply interface and the connection load of the second power supply interface, electrical signal collection unit connect the first power supply interface and second and supply
Electrical interface obtains output electric signal and is delivered to battery management unit, the first electrode and second electrode of each battery unit
It is connect with voltage acquisition unit, the voltage acquisition unit exports the voltage value signal of acquired battery unit to battery management list
Member, the battery management unit output control signals to the switch element of each battery unit.
The load is equipped with controller, and the controller exports power demands signal to battery management unit.
Before receiving the signal of starting load, the switch element of all battery units keeps off state；
After receiving the signal of starting load, the first switching element and the 4th switch element of all battery units are controlled
Closure, second switch element and third switch element disconnect, and are anode with first electrode, and second electrode is cathode output；
If electrical signal collection unit collects load and is powered, remains load supplying and supplied until receiving stopping for load
The signal of electricity；
If electrical signal collection unit collects load and is not powered on, the first switching element and of all battery units is controlled
Four switch elements disconnect, and second switch element and third switch element closure, using first electrode as cathode, second electrode is anode
Output, and then remain load supplying until receive stop be load supplying signal, and then remain load supplying until
Receive the signal stopped as load supplying.
If battery management unit receives the voltage requirements adjustment signal of controller sending, battery management unit is according to voltage
Demand, which tables look-up to obtain, needs to disconnect the quantity of battery unit, and the battery unit for being intended to disconnect later bypasses out series-connected cell group,
Bypass out series-connected cell group method:
The first switching element and third switch element for the battery unit being bypassed are closed, and second switch element and the 4th is opened
It closes element to disconnect, or the first switching element and third switch element of the battery unit being bypassed disconnect, second switch element
It is closed with the 4th switch element.
During battery-powered, if battery management unit detects the low voltage of some or multiple battery units
Perhaps the battery unit of low voltage or abnormal state is then bypassed out battery pack by abnormal state.
When there is percentage of batteries unit to bypass out series-connected cell group because of the voltage requirements of controller, if having because voltage is inclined
Low or abnormal state and the battery unit for bypassing out series-connected cell group, the then series electrical bypassed out by it before by voltage requirements
The battery unit of pond group accesses battery pack again, and the battery unit quantity being currently accessed is made to meet the voltage requirements of controller.
During battery-powered, if battery management unit detects that the voltage of some or multiple battery units is inclined
It is low, carry out the control of discharge logic of charge balancing:
If the battery unit currently powered is anode with first electrode, second electrode is cathode output, then controls voltage
The first switching element of relatively low battery unit and the 4th switch element disconnect, and second switch element and third switch element close
It closes；
If the battery unit currently powered, using first electrode as cathode, second electrode is anode output, then voltage is controlled
The first switching element of relatively low battery unit and the 4th switch element closure, second switch element and third switch element are disconnected
It opens.
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, single battery (or single battery group) number of output electric discharge is added by control, realizes discharge voltage direct current drop
It presses adjustable.
3, tandem compound can be reversely added in single battery (or single battery group), does electric discharge connection, carries out more efficient
Active equalization.
4, 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.
5, 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.
6, the positive and negative electrode direction of the conducting bridge arm self-adapting load of control H bridge can be passed through.
7, 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:
Schematic diagram when Fig. 1 is charge/discharge control circuit regular picture；
Fig. 2 is that there are low voltage or abnormal state schematic diagrames for charge/discharge control circuit；
Fig. 3 is that there are low voltage schematic diagrames for charge/discharge control circuit.
Specific embodiment
Charge/discharge control circuit is a kind of battery pack H bridge cascaded structure, has the output of battery protection and active equalization function
The adjustable charge/discharge control circuit of voltage.The compatible discharge voltage of the circuit design connects forward or backwards, passes through control electric current
Guiding path carries out control of discharge, it can be achieved that master identical with bus current size to each single battery (or single battery group)
The dynamic ability of equalization.By single battery (or single battery group) number of control output electric discharge, realize that discharge voltage direct current is adjustable.
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 added by control
Single battery (or single battery group) number of electric discharge is exported, realizes that discharge voltage DC decompression is adjustable.
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.
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.
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.Change seal in bus participate in electric discharge single battery (or
Single battery group) number, and bypass out single battery (or single battery group) number of tandem compound, i.e., changeable bus electricity
Pressure realizes that discharge voltage DC decompression is adjustable.
Voltage and status information of the discharge process according to each single battery (or single battery group), normal single battery
(or single battery group) forward seals in bus by H-bridge circuit and carries out electric discharge connection, passes through discharge current.Abnormal single battery
(or single battery group) can be by H-bridge circuit by this grade of bus short join, this grade of cell bypass goes out tandem compound, obstructed overdischarge electricity
Stream.The single battery (or single battery group) of low voltage can also reversely be sealed in bus by H-bridge circuit and carry out charging connection, more
It is efficient to carry out 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 control of discharge mechanism based on the circuit structure.
The utility model belongs to battery management technique, provides the circuit connection structure and control of discharge machine of a kind of battery pack packet
System.
By the utility model technology, battery management circuit can realize that the DC decompression of discharge voltage is adjustable.
By the utility model technology, requirement of the battery pack packet to single battery consistency can be substantially reduced.
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.
As shown in Figure 1, regular picture control logic:
According to the positive and negative electrode direction of load, suitable bridge arm can be connected and carry out electric discharge connection.Sx_4, Sx_1 switch conduction, institute
There is the anode of single battery (or single battery group) to access series bus by Sx_4, cathode accesses series bus by Sx_1.
Discharge current is by all battery units in battery pack.
According to the positive and negative electrode direction of load, suitable bridge arm can be connected and carry out electric discharge connection.Sx_2, Sx_3 switch conduction, institute
There is the anode of single battery (or single battery group) to access series bus by Sx_2, cathode accesses series bus by Sx_3.
Discharge current is by all battery units in battery pack.
As shown in Fig. 2, 1 group or multiple groups single battery (or single battery group) low voltage or abnormal state, bypass out and go here and there
Join combined control of discharge logic:
It may be selected that upper bridge arm is connected or lower bridge arm be shorted series bus, this grade of single battery (or single battery group) bypasses out
Tandem compound, obstructed overdischarge electric current.
Such as there is abnormal B2 battery unit, controls bridge arm S2_2, S2_4 switch conduction, the grade in the battery H-bridge circuit
Series bus is shorted, and B2 cell bypass goes out tandem compound, obstructed overdischarge electric current.
Such as there is abnormal B3 battery unit, controls bridge arm S3_1, S3_3 switch conduction, the grade in the battery H-bridge circuit
Series bus is shorted, and B3 cell bypass goes out tandem compound, obstructed overdischarge electric current.
Single battery (or single battery group) number of output electric discharge is added by control, can also realize discharge voltage direct current
It is depressured adjustable.
As shown in figure 3,1 group or multiple groups single battery (or single battery group) low voltage, carry out the electric discharge of charge balancing
Control logic:
The single battery (or single battery group) of low voltage can also reversely be sealed in bus by H-bridge circuit and carry out charging company
It connects, more efficient carry out active equalization.
Other battery unit H-bridge circuit Sx_4, Sx_1 switch conductions, corresponding battery unit forward access series bus,
Carry out electric discharge connection.But there are the B2 battery unit of low voltage, H-bridge circuit S2_2, S2_3 switch conduction, this grade of reverse batteries
Tandem compound is added, does charging connection, carries out more efficient active equalization.
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 (2)
1. based on the adjustable charge/discharge control circuit of output voltage of battery pack H bridge cascaded structure, battery pack is by the electricity that is serially connected
Pool unit constitute, it is characterised in that: each battery unit be equipped with a H axle assemble, the H axle assemble by first switching element,
Second switch element, third switch element and the 4th switch element successively join end to end composition, and the anode of the battery unit connects
Enter between second switch element and the 4th switch element, the cathode of the battery unit is linked into first switching element and third
Between switch element, between the third switch element and the 4th switch element extracting power supply cord as the battery unit first
Electrode and other battery cells in series, extracting power supply cord is as the battery between the first switching element and second switch element
The second electrode of unit and other battery cells in series, the first electrode of each battery unit and the second of another battery unit
Electrode connection, wherein being located at the first power supply interface of the first electrode connection battery pack of the battery unit of head end, positioned at end
Second power supply interface of the second electrode connection battery pack of battery unit, first power supply interface and the connection of the second power supply interface
Load, electrical signal collection unit connects the first power supply interface and the second power supply interface obtains output electric signal and is delivered to cell tube
Unit is managed, the first electrode and second electrode of each battery unit are connect with voltage acquisition unit, the voltage acquisition list
Member exports the voltage value signal of acquired battery unit to battery management unit, and the battery management unit is output control signals to
The switch element of each battery unit.
2. charge/discharge control circuit according to claim 1, it is characterised in that: the load is equipped with controller, the control
Device exports power demands signal to battery management unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820792999.1U CN208479209U (en) | 2018-05-25 | 2018-05-25 | The adjustable charge/discharge control circuit of output voltage based on battery pack H bridge cascaded structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820792999.1U CN208479209U (en) | 2018-05-25 | 2018-05-25 | The adjustable charge/discharge control circuit of output voltage based on battery pack H bridge cascaded structure |
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| Publication Number | Publication Date |
|---|---|
| CN208479209U true CN208479209U (en) | 2019-02-05 |
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|---|---|---|---|
| CN201820792999.1U Expired - Fee Related CN208479209U (en) | 2018-05-25 | 2018-05-25 | The adjustable charge/discharge control circuit of output voltage based on battery pack H bridge cascaded structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899942A (en) * | 2018-05-25 | 2018-11-27 | 李勇 | The adjustable charge/discharge control circuit of output voltage and its control method based on battery pack H bridge cascaded structure |
-
2018
- 2018-05-25 CN CN201820792999.1U patent/CN208479209U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899942A (en) * | 2018-05-25 | 2018-11-27 | 李勇 | The adjustable charge/discharge control circuit of output voltage and its control method based on battery pack H bridge cascaded 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 |
Granted publication date: 20190205 Termination date: 20190525 |
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| CF01 | Termination of patent right due to non-payment of annual fee |