CN108649648A - Low-tension supply based on adjustable battery pack cascaded structure is to high-tension battery group charging control circuit and its control method - Google Patents
Low-tension supply based on adjustable battery pack cascaded structure is to high-tension battery group charging control circuit and its control method Download PDFInfo
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- CN108649648A CN108649648A CN201810565653.2A CN201810565653A CN108649648A CN 108649648 A CN108649648 A CN 108649648A CN 201810565653 A CN201810565653 A CN 201810565653A CN 108649648 A CN108649648 A CN 108649648A
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- 238000000034 method Methods 0.000 title claims description 21
- 230000005611 electricity Effects 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 8
- 230000005669 field effect Effects 0.000 description 8
- 239000000178 monomer Substances 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 208000032953 Device battery issue Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 206010068052 Mosaicism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000003765 sex chromosome Anatomy 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- H02J7/0021—
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- H02J7/0026—
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Present invention is disclosed a kind of low-tension supplies based on adjustable battery pack cascaded structure to high-tension battery group charging control circuit, the circuit design can carry out charge control by controlling the guiding path of electric current to each single battery (or single battery group), it can be connected according to several single batteries of the arbitrary dynamic select of voltage value (or single battery group) of low-tension supply and charge circuit is added, realize that low-tension supply charges to high-tension battery group.To the single battery (or single battery group) of series bus is not added, it can be achieved that active equalization ability identical with charging current.By dynamic control, each single battery (or single battery group) in battery pack can reach fully charged.
Description
Technical field
The present invention relates to field of batteries.
Background technology
New energy technology is fast-developing, especially lithium battery the fields such as standby energy storage and electric vehicle extensive use,
Requirements at the higher level are proposed to crucial battery energy storage and battery management technique, need to promote the validity for charging to battery pack and equilibrium
Ability makes the energy storage characteristic of battery pack perform to most preferably.The especially use of high-tension battery group, needs effectively to solve high voltage to fill
The using security issues of electricity.The hardware cost for needing reduction high-voltage charging equipment simultaneously, enables new energy battery technology to obtain
Wider promotion and application.
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
Sex chromosome mosaicism is caused, coherence request of the battery pack packet to single battery is reduced.
There is the problems such as efficiency is low, and practical application effect is undesirable with active equalization technology in current passive equilibrium.It is special
It is not active equalization technology, including capacitance 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
Reason technology improves reliability and the safety of battery applications.
Invention content
The technical problem to be solved by the present invention is to realize a kind of adjustable battery pack cascaded structure, have battery protection and
The low-tension supply of active equalization function is to high-tension battery group charging control circuit.
To achieve the goals above, the technical solution adopted by the present invention is：Based on the low of adjustable battery pack cascaded structure
For voltage source to high-tension battery group charging control circuit, battery pack includes battery unit and battery management unit, each battery
The anode connection electrode input end of unit, cathode connect negative input, and the electrode input end connection of adjacent cell is adjacent
The negative input of battery unit constitutes concatenated battery pack, the electrode input end and negative input of each battery unit
Between connected by second switch element, the electrode input end and battery unit anode or negative input and battery unit
First switching element is equipped between cathode, electrode input end and the cathode for being located at the battery unit of battery pack head and the tail position are defeated
Enter charging interface of the end as battery pack, each battery unit is respectively connected with voltage and electric quantity acquisition unit, the voltage
Acquired signal is exported to battery management unit with electric quantity acquisition unit, and the battery management unit is output control signals to often
The first switching element and second switch element of a battery unit.
When the first switching element of battery unit disconnects, second switch element is closed, the battery unit is from battery pack
Separation, when the first switching element of battery unit is closed, second switch element disconnects, which is linked into battery pack
In.
The charging interface is equipped with charging voltage collecting unit, and the charging voltage collecting unit outputs voltage signal to electricity
Pond administrative unit.
Based on low-tension supply to the control method of high-tension battery group charging control circuit:
When starting to charge up, the input voltage of charging interface is obtained；
It alarms if output voltage values are more than the safety value upper limit, if between the safety value upper limit and safety value lower limit,
Start to charge for all batteries unit, is that battery unit charges in batches if being less than safety value lower limit.
The first switching element of the battery unit of charged state is closed, second switch element disconnects, the electricity of non-charged state
The first switching element of pool unit disconnects, second switch element is closed.
If the input voltage of charging interface is less than safety value lower limit, compared according to the input voltage of current charging interface pre-
Deposit table, obtain the battery unit quantity that every batch of participates in charging, in charging process, if it is current participate in charging some or it is more
A battery unit electricity is full of, then disconnects the switch element for the battery unit for filling with electricity, and not yet fully charged electricity is added
Pool unit participates in charging, keeps the battery unit quantity for currently participating in charging identical as the numerical value for acquisition of tabling look-up, until all batteries
Unit is each filled with electricity.
The present invention can adjust battery pack cascaded structure, have the low-tension supply of battery protection and active equalization function to high pressure
Battery pack charging control circuit.The circuit design can by control electric current guiding path to each single battery (or monomer electricity
Pond group) charge control is carried out, it can be according to several single batteries of the arbitrary dynamic select of voltage value of low-tension supply (or single battery
Group) series connection addition charge circuit, realize that low-tension supply charges to high-tension battery group.To the monomer electricity of series bus is not added
Pond (or single battery group) is, it can be achieved that active equalization ability identical with charging current.By dynamic control, in battery pack
Each single battery (or single battery group) can reach fully charged.
Compared with prior art, the beneficial effects of the invention are as follows：
Charging process adds according to several single batteries of the arbitrary dynamic select of voltage value (or single battery group) of low-tension supply
Enter tandem compound, the series voltage of battery pack controlled can adjust, and realize that low-tension supply charges to high-tension battery group.
Tandem compound can be added in single battery (or single battery group), can also bypass out tandem compound completely.It can control
Charging current processed is with or without arbitrary single battery (or single battery group), you can reaches euqalizing current and is equal to charging current
High efficiency it is balanced.
Each single battery (or single battery group) in battery pack can reach fully charged, make the energy storage of battery pack
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, you can realization seals in or Bypass Control, simple circuit, and control is simple, of low cost.
Failure or quality problems especially are occurred to single battery (or single battery group), can completely be bypassed in tandem compound
Outside, reliability and the safety of battery pack application are provided.
Description of the drawings
The content of every width attached drawing expression in description of the invention is briefly described below：
Fig. 1 is that the low-tension supply based on adjustable battery pack cascaded structure illustrates high-tension battery group charging control circuit
Figure；
Fig. 2 is charging of the low-tension supply based on adjustable battery pack cascaded structure to high-tension battery group charging control circuit
Status diagram.
Label in above-mentioned figure is：
Specific implementation mode
The technical solution adopted in the present invention is that change is existing directly by single battery (or single battery group) tandem compound
At battery pack, but break-make control is carried out by field-effect tube, relay or other switching devices, by single battery (or monomer
Battery pack) busbar is sealed in, battery voltage is obtained by busbar.Also can by field-effect tube, relay or other switching devices into
Row break-make controls, and by this grade of busbar conducting connection, single battery (or single battery group) bypasses out tandem compound, obstructed overcharge
Electric current.
Each single battery (or single battery group) in battery pack passes through field-effect tube, relay or other switching devices
Break-make control is carried out, realizes and single battery (or single battery group) is sealed in into busbar, 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 conductions, Sx_2 (second switch element) switches disconnect, then this grade of monomer electricity
Pond (or single battery group) seals in busbar, participates in charging.Sx_1 switches disconnect, Sx_2 switch conductions, then this grade of single battery (or
Single battery group) tandem compound is bypassed out, without charging.
Adjustable battery pack cascaded structure, has the low-tension supply of battery protection and active equalization function to high-tension battery group
Charging control circuit is specific 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 break-make control is carried out by field-effect tube, relay or other switching devices, by single battery (or single battery group)
Seal in busbar.
Single battery (or single battery group) can carry out break-make control by field-effect tube, relay or other switching devices
System, by this grade of busbar conducting connection, single battery (or single battery group) then bypasses out tandem compound.
Charging process is logical according to several single batteries of the arbitrary dynamic select of voltage value (or single battery group) of low-tension supply
It crosses field-effect tube, relay or other switching devices and seals in busbar progress charging connection, realize low-tension supply to high-tension battery group
It charges.Other single batteries (or single battery group) can should by field-effect tube, relay or other switching devices
Grade busbar conducting connection, this grade of cell bypass go out tandem compound, obstructed overcharge current.
Charging 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 busbar charging or bypasses out tandem compound, realizes charge protection and active equalization.
By dynamic control, each single battery (or single battery group) in battery pack can reach fully charged.
Charging process is equal to charging current to the euqalizing current of each single battery (or single battery group).
By the inventive technique, the charging voltage to high-tension battery group can be reduced, reaches better voltage security standard.It is logical
Crossing reduces the output voltage of charger, and the use environment of charger is safer, and design complexities and hardware cost are greatly reduced.
By the inventive technique, requirement of the battery pack packet to single battery consistency can be substantially reduced.
By the inventive technique, each single battery (or single battery group) in battery pack can be realized charge protection and
Active equalization.Each single battery (or single battery group) can reach fully charged.
It, can there will be the single batteries of problem (or single battery group) thoroughly to exclude in tandem compound by the inventive technique
Outside, the use that battery pack will not be influenced because of the damage of individual monomers battery (or single battery group), greatly improves the safety of system
Property and reliability.
Normal high-voltage charging control logic：
Sx_1 switch conductions, Sx_2 switches disconnect.All single batteries (or single battery group) access series bus, charging
Voltage is equal to the series voltage of all battery units.
Low pressure charging control logic：
According to the voltage value of charge power supply several groups are selected in conjunction with the status information of single battery (or single battery group)
Sx_1 switch conductions, Sx_2 switches disconnect.So that the cell voltage of addition tandem compound is met the voltage request of charging voltage, realizes
Low pressure charges.
Charging process, serial connection charge is added in the single battery (or single battery group) for adjusting different location in real time, final real
Each single battery (or single battery group) in existing battery pack can reach fully charged.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is used, or without changing
Other occasions are directly applied to by the design of the present invention and technical solution, within protection scope of the present invention.
Claims (6)
1. the low-tension supply based on adjustable battery pack cascaded structure, to high-tension battery group charging control circuit, battery pack includes electricity
Pool unit and battery management unit, the anode connection electrode input end of each battery unit, cathode connect negative input,
The negative input of the electrode input end connection adjacent cell of adjacent cell constitutes concatenated battery pack, and feature exists
In：It is connected by second switch element between the electrode input end and negative input of each battery unit, the anode
It is equipped with first switching element between input terminal and battery unit anode or negative input and battery unit cathode, is located at described
Charging interface of the electrode input end and negative input of the battery unit of battery pack head and the tail position as battery pack, it is each described
Battery unit is respectively connected with voltage and electric quantity acquisition unit, and the voltage and electric quantity acquisition unit export acquired signal to electricity
Pond administrative unit, the battery management unit output control signals to the first switching element and second switch of each battery unit
Element.
2. low-tension supply according to claim 1 is to high-tension battery group charging control circuit, it is characterised in that：When battery list
When the first switching element of member disconnects, second switch element is closed, which detaches from battery pack, when battery unit
When first switching element is closed, second switch element disconnects, which is linked into battery pack.
3. low-tension supply according to claim 2 is to high-tension battery group charging control circuit, it is characterised in that：The charging
Interface is equipped with charging voltage collecting unit, and the charging voltage collecting unit outputs voltage signal to battery management unit.
4. based on low-tension supply described in claim 1-3 to the control method of high-tension battery group charging control circuit, feature exists
In：When starting to charge up, the input voltage of charging interface is obtained；
It alarms if output voltage values are more than the safety value upper limit, if between the safety value upper limit and safety value lower limit, starts
It charges for all batteries unit, is that battery unit charges in batches if being less than safety value lower limit.
5. control method according to claim 4, it is characterised in that：The first switching element of the battery unit of charged state
It is closed, the disconnection of second switch element, the first switching element of the battery unit of non-charged state disconnects, second switch element closes
It closes.
6. control method according to claim 4 or 5, it is characterised in that：If the input voltage of charging interface is less than safety
It is worth lower limit, then the table that prestores is compared according to the input voltage of current charging interface, obtains the battery unit that every batch of participates in charging
Quantity, in charging process, if current some or the multiple battery unit electricity for participating in charging is full of, disconnection fills with electricity
Battery unit switch element, and not yet fully charged battery unit is added and participates in charging, make the battery for currently participating in charging
Element number is identical as the numerical value for acquisition of tabling look-up, until all battery units are each filled with electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810565653.2A CN108649648A (en) | 2018-06-04 | 2018-06-04 | Low-tension supply based on adjustable battery pack cascaded structure is to high-tension battery group charging control circuit and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810565653.2A CN108649648A (en) | 2018-06-04 | 2018-06-04 | Low-tension supply based on adjustable battery pack cascaded structure is to high-tension battery group charging control circuit and its control method |
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| Publication Number | Publication Date |
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| CN108649648A true CN108649648A (en) | 2018-10-12 |
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| CN201810565653.2A Pending CN108649648A (en) | 2018-06-04 | 2018-06-04 | Low-tension supply based on adjustable battery pack cascaded structure is to high-tension battery group charging control circuit and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113263957A (en) * | 2021-05-17 | 2021-08-17 | 重庆大学 | Energy optimization device and method for power battery system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253469A (en) * | 2014-09-24 | 2014-12-31 | 于志章 | Secondary battery pack charging and discharging management system |
| CN208479213U (en) * | 2018-06-04 | 2019-02-05 | 李勇 | Low-tension supply based on adjustable battery pack cascaded structure is to high-tension battery group charging control circuit |
-
2018
- 2018-06-04 CN CN201810565653.2A patent/CN108649648A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253469A (en) * | 2014-09-24 | 2014-12-31 | 于志章 | Secondary battery pack charging and discharging management system |
| CN208479213U (en) * | 2018-06-04 | 2019-02-05 | 李勇 | Low-tension supply based on adjustable battery pack cascaded structure is to high-tension battery group charging control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113263957A (en) * | 2021-05-17 | 2021-08-17 | 重庆大学 | Energy optimization device and method for power battery system |
| CN113263957B (en) * | 2021-05-17 | 2022-06-24 | 重庆大学 | Energy optimization device and method for power battery system |
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