CN208479212U - Single-phase inversion charge/discharge control circuit based on adjustable battery pack cascaded structure - Google Patents
Single-phase inversion charge/discharge control circuit based on adjustable battery pack cascaded structure Download PDFInfo
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- CN208479212U CN208479212U CN201820854371.XU CN201820854371U CN208479212U CN 208479212 U CN208479212 U CN 208479212U CN 201820854371 U CN201820854371 U CN 201820854371U CN 208479212 U CN208479212 U CN 208479212U
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- battery
- output end
- phase inversion
- unit
- battery pack
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of adjustable battery pack cascaded structure, has the single-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, can realize that single-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 application of battery pack, except battery management system also needs to increase inverter circuit just achievable inversion electric discharge.System structure
Frame 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 adjustable battery pack cascaded structure, has battery guarantor
The single-phase inversion charge/discharge control circuit of shield and active equalization function.
To achieve the goals above, the technical solution adopted in the utility model are as follows: based on adjustable battery pack cascaded structure
Single-phase inversion charge/discharge control circuit, battery pack is made of battery cells in series, and the anode connection of each battery unit is just
Pole output end, cathode connect cathode output end, and the cathode of the cathode output end connection adjacent cell of adjacent cell is defeated
Outlet constitutes concatenated battery pack, positioned at the cathode output end and cathode output end of the battery unit of battery pack head and the tail position
As the power supply output end of battery pack, opened between the cathode output end and cathode output end of each battery unit by second
Element connection is closed, is equipped with the between the cathode output end and battery unit anode or cathode output end and battery unit cathode
One switch element, circuit are equipped with PWM modulator, and the PWM modulator exports modulated signal to all switch elements.
The cathode output end and cathode output end of each battery unit are respectively connected with voltage sampling unit, the voltage
Using element output signal to battery management unit, the battery management unit outputs control signals to PWM modulator.
The power supply output end is connected with total voltage sampling unit, and the total voltage is using element output signal to cell tube
Manage unit.
Each battery unit includes the shell of battery cell and fixed battery cell, and contact electricity is equipped in the shell
The temperature sensor of pool unit, the temperature sensor output temperature signal to battery management unit.
The first switching element and second switch element are field-effect tube.
Based on the control method of the single-phase inversion charge/discharge control circuit, battery pack start power supply when, PWM modulator according to
Setpoint frequency makes the battery unit for being currently at working condition is synchronous to switch with following two states, and keeps being currently at non-
The battery unit second switch element of working condition is closed, and first switching element disconnects；
Described two states:
Battery unit second switch element closure, while first switching element disconnects, and maintains setting time；
Battery unit first switching element closure, while second switch element disconnects, and maintains setting time.
Battery management unit obtains the voltage and temperature signal for being each currently at the battery unit of working condition in real time, if
There are some battery cell voltage is higher or temperature anomaly, then the battery unit is set to enter off working state, while one being worked as
The preceding battery unit in off working state enters working condition.
Battery management unit obtains total output voltage signal in real time, if output voltage is greater than target voltage interval value, subtracts
It is currently at the quantity of the battery unit of working condition less, if output voltage is less than target voltage interval value, increases current place
In the quantity of the battery unit of working condition.
The utility model is a kind of single-phase inversion charge/discharge control circuit for having battery protection and active equalization function.The electricity
Road design can carry out control of discharge to each single battery (or single battery group) by controlling the guiding path of electric current, pass through
PWM switch modulation can realize that single-phase inversion discharges.The circuit design can realize active equalization energy identical with discharge current size
Power.It is controlled by dynamic, each single battery (or single battery group) in battery pack, which can reach, to be substantially discharged.
Including following the utility model has the advantages that
Tandem compound can be added in single battery (or single battery group), tandem compound can also be bypassed out completely.It can control
Discharge current processed can reach euqalizing current equal to discharge current with or without any single battery (or single battery group)
High efficiency it is balanced.
According to single-phase inversion control mechanism, pass through all companies for sealing in bus structure and participating in electric discharge output of PWM switch modulation
Circuit is connect, it can be achieved that single-phase inversion discharges.Cancel additional inverter module.
Needed for nominal discharge voltage on the basis of battery strings number, increase a section or more piece single battery (or single battery
Group) as balanced redundancy.When can accomplish to bypass into single battery (or single battery group) of discharge prevention or active equalization,
Battery power discharge voltage is normal.Each single battery (or single battery group), which can reach, to be substantially discharged, and the storage of battery pack is made
Energy characteristic performs to most preferably, and independent of the coherence request to single battery.
Two groups of field-effect tube, relay or other switching device conducts is used only in each single battery (or single battery group)
Turn-on and turn-off control, can be realized and seal in or Bypass Control, and simple circuit, control is simple, low in cost.
Failure or quality problems especially are occurred to single battery (or single battery group), can be 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 single-phase inversion charge/discharge control circuit schematic diagram based on adjustable battery pack cascaded structure.
Specific embodiment
Each single battery (or single battery group) in battery pack passes through field-effect tube, relay or other switching devices
On-off control is carried out, realizes and single battery (or single battery group) is sealed in into bus, or by single battery (or single battery group)
Bypass out tandem compound.
The cathode of single battery (or single battery group) is directly connected with series bus, positive then (first opens by Sx_1
Close element) switch connection series bus.Sx_1 switch conduction, Sx_2 (second switch element) switch disconnect, then this grade of monomer electricity
Pond (or single battery group) seals in bus, participates in electric discharge.Sx_1 switch disconnects, Sx_2 switch conduction, then this grade of single battery (or
Single battery group) tandem compound is bypassed out, without electric discharge.
According to single-phase inversion control mechanism, pass through all companies for sealing in bus structure and participating in electric discharge output of PWM switch modulation
Circuit is connect, it can be achieved that single-phase inversion discharges.Inverter output voltage is the superposition of every grade of inverter voltage and series connection series.
Specifically, it can adjust battery pack cascaded structure, the single-phase inversion for having battery protection and active equalization function is put
Electric control circuit structure is as follows:
Single battery (or single battery group) cathode is directly connected with series bus, and directly series connection does not form battery to anode
Group, but on-off control is carried out by field-effect tube, relay or other switching devices, by single battery (or single battery group)
Seal in bus.
Single battery (or single battery group) can carry out on-off control by field-effect tube, relay or other switching devices
System, by this grade of bus conducting connection, single battery (or single battery group) then bypasses out tandem compound.
According to single-phase inversion control mechanism, pass through all companies for sealing in bus structure and participating in electric discharge output of PWM switch modulation
Circuit is connect, it can be achieved that single-phase inversion discharges.Inverter output voltage is the superposition of every grade of inverter voltage and series connection series.
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 seal in bus by field-effect tube, relay or other switching devices and carry out electric discharge connection.Abnormal
Single battery (or single battery group) can be connected this grade of bus conducting by field-effect tube, relay or other switching devices,
This grade of cell bypass goes out tandem compound, obstructed overdischarge electric current.
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
A single battery (or single battery group) seals in bus discharge or bypasses out tandem compound, realizes discharge prevention and active equalization.
It is controlled by dynamic, each single battery (or single battery group) in battery pack, which can reach, to be substantially discharged.
Discharge process is equal to discharge current to the euqalizing current of each single battery (or single battery group).
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 single-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.
Single-phase inversion control of discharge logic:
Sx_1 switch and Sx_2 switch by PWM combination control, by dynamic adjust output electric discharge single battery (or list
Body battery pack) number, so that the variation of output voltage is met the voltage requirement of single-phase 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 (5)
1. battery pack is by battery cells in series structure based on the single-phase inversion charge/discharge control circuit of adjustable battery pack cascaded structure
At the anode connection cathode output end of each battery unit, cathode connects cathode output end, the anode of adjacent cell
The cathode output end that output end connects adjacent cell constitutes concatenated battery pack, it is characterised in that: is located at the battery pack
Power supply output end of the cathode output end and cathode output end of the battery unit of head and the tail position as battery pack, each battery
It is connected between the cathode output end and cathode output end of unit by second switch element, the cathode output end and battery unit
First switching element is equipped between anode or cathode output end and battery unit cathode, circuit is equipped with PWM modulator, described
PWM modulator exports modulated signal to all switch elements.
2. single-phase inversion charge/discharge control circuit according to claim 1, it is characterised in that: each battery unit is just
Pole output end and cathode output end are respectively connected with voltage sampling unit, and the voltage is using element output signal to battery management list
Member, the battery management unit output control signals to PWM modulator.
3. single-phase inversion charge/discharge control circuit according to claim 2, it is characterised in that: the power supply output end is connected with
Total voltage sampling unit, the total voltage is using element output signal to battery management unit.
4. single-phase inversion charge/discharge control circuit according to claim 3, it is characterised in that: each battery unit includes
The shell of battery cell and fixed battery cell, the interior temperature sensor for being equipped with contact battery unit of the shell, the temperature
Sensor output temperature signal is to battery management unit.
5. single-phase inversion charge/discharge control circuit according to claim 4, it is characterised in that: the first switching element and
Two switch elements are field-effect tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820854371.XU CN208479212U (en) | 2018-06-04 | 2018-06-04 | Single-phase inversion charge/discharge control circuit based on adjustable battery pack cascaded structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820854371.XU CN208479212U (en) | 2018-06-04 | 2018-06-04 | Single-phase inversion charge/discharge control circuit based on adjustable battery pack cascaded structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208479212U true CN208479212U (en) | 2019-02-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820854371.XU Expired - Fee Related CN208479212U (en) | 2018-06-04 | 2018-06-04 | Single-phase inversion charge/discharge control circuit based on adjustable battery pack cascaded structure |
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| CN (1) | CN208479212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649647A (en) * | 2018-06-04 | 2018-10-12 | 李勇 | Single-phase inversion charge/discharge control circuit based on adjustable battery pack cascaded structure and its control method |
-
2018
- 2018-06-04 CN CN201820854371.XU patent/CN208479212U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649647A (en) * | 2018-06-04 | 2018-10-12 | 李勇 | Single-phase inversion charge/discharge control circuit based on adjustable battery pack cascaded structure and its control method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190205 Termination date: 20190604 |
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| CF01 | Termination of patent right due to non-payment of annual fee |