CN104836307B - Power lithium battery pack balanced system adopting rotary brush structure - Google Patents
Power lithium battery pack balanced system adopting rotary brush structure Download PDFInfo
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- CN104836307B CN104836307B CN201510277980.4A CN201510277980A CN104836307B CN 104836307 B CN104836307 B CN 104836307B CN 201510277980 A CN201510277980 A CN 201510277980A CN 104836307 B CN104836307 B CN 104836307B
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- Prior art keywords
- rotary brush
- battery
- brush structure
- brush
- voltage
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 17
- 230000000052 comparative effect Effects 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000004146 energy storage Methods 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 6
- 239000000178 monomer Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a power lithium battery pack balanced system adopting a rotary brush structure. The system comprises the rotary brush structure, a balanced control module and a balanced execution circuit. The rotary brush structure comprises a pair of brushes driven by a motor to rotate, and a plurality of contact chips circumferentially distributed and fixed at the periphery of the brushes, and is used for switching the balanced execution circuit to connect with different single batteries. The balanced control module is used for detecting the state of the current single battery, and outputs a control logic according to a comparative result of the state of the current single battery and the state of the whole battery pack. The balanced execution circuit is used for charging or discharging the currently connected single battery according to the control logic, so as to realize balance of the battery pack. Through adoption of the system, balance of the power lithium battery pack is realized. The system has the advantages of low control difficulty, low circuit complexity and speediness and so on.
Description
Technical field
The present invention relates to lithium battery management technique field, more particularly to a kind of dynamic lithium battery of employing rotary brush structure
Group equalizing system.
Background technology
Due to the impact of the factor such as cell making process and single cell operation environmental difference, cell in lithium battery group
There is problem of inconsistency.Discordance between cell can directly affect the service efficiency of set of cells, while electricity can be reduced
The service life of pond group.Accordingly, it would be desirable to design special equalizing circuit, equilibrium is carried out to set of cells.
At present, equalizing circuit is more carries out circuit switching in the form of electronic switching element, completes the equilibrium being passively or actively
Process；Component used in which is numerous, complex structure, and the control algolithm for being adopted is also more numerous and more jumbled, and euqalizing current is then
Restricted often smaller by electronic component, so as to directly affect rapidity in a balanced way.
The content of the invention
It is an object of the invention to provide a kind of dynamic lithium battery group equalizing system of employing rotary brush structure, realizes dynamic
The equilibrium of power lithium battery group, has the advantages that low control difficulty, low circuit complexity and quick.
The purpose of the present invention is achieved through the following technical solutions：
A kind of dynamic lithium battery group equalizing system of employing rotary brush structure, the system include：Rotary brush structure,
Weighing apparatus control module and balanced execution circuit；Wherein：
The rotary brush structure, by the brush that can be rotated by motor for a pair and is fixed on the brush periphery circumferentially
Some contact chip compositions of distribution, are connected to different cells for switching the balanced execution circuit；
The equalization control module, for detecting the state of current monolithic battery, and according to the state of current monolithic battery
With the comparative result output control logic of whole group battery status；
The balanced execution circuit, for being charged to current connected cell according to the control logic or
Electric discharge, realizes the equilibrium of set of cells.
The position of some contact chips in the rotary brush structure is fixed and individually each with series battery
One end of cell is connected, a pair of brushes in the rotary brush structure by with two adjacent contact chips contact come
It is connected with the positive and negative polarities of a certain cell, and when the rotary brush structure drives brush rotation by a direct current generator
When, whenever brush is contacted with two adjacent contact chips, can make a pair of brushes respectively with a certain cell positive and negative two
Extremely it is connected, and keeps polarity constant.
The equalization control module is connected with a pair of brushes in the rotary brush structure, is made by driving brush rotation
Obtain the equalization control module to be individually connected with the positive and negative polarities of each cell；
The equalization control module is external connection battery management system, or itself embedded control unit and voltage acquisition list
Unit, or build certainly filtering comparison circuit；For detecting the average voltage level of the magnitude of voltage and whole group battery of current monolithic battery,
And compare the magnitude relationship of the two；High electricity is exported if the magnitude of voltage of current monolithic battery is higher than the average voltage of whole group battery
It is flat, low level is exported if the magnitude of voltage of current monolithic battery is less than the average voltage of whole group battery, the high level of its output
With low level as the control logic to balanced execution circuit.
The balanced execution circuit is connected with a pair of brushes in the rotary brush structure, is made by driving brush rotation
Obtain the balanced execution circuit to be individually connected with the positive and negative polarities of each cell；
The balanced execution circuit includes：Energy-storage travelling wave tube and connection brush are returned with the charging and discharging two of energy-storage travelling wave tube
Road：Wherein：
Contain Voltage stabilizing module in charge circuit, the controlled logic control of the Voltage stabilizing module, when control logic is high level
Voltage stabilizing charging operations are performed, is charged from current connected cell to energy-storage travelling wave tube；
Discharge loop contains a controlled switch, is controlled the control of logic, closes when control logic is low level
Discharge loop, makes energy-storage travelling wave tube be discharged to current connected cell.
As seen from the above technical solution provided by the invention, replace electrical switch to realize using rotary brush structure
Circuit switches, and simple structure is easy to operate, makes due to adopting electrical switch in a large number in can solving existing equalizing circuit scheme
Into number of elements it is many, circuit complexity is high, controls difficulty problem；Meanwhile, electrical switch can be released to euqalizing current
Restriction, increase euqalizing current under conditions of brush structure is allowed, improve speed in a balanced way；Using the energy storage such as super capacitor unit
Part and voltage stabilizing charging module, improve the efficiency of energy transfer, obtain stable portfolio effect.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be to using needed for embodiment description
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, can be obtaining other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of showing for the dynamic lithium battery group equalizing system of employing rotary brush structure provided in an embodiment of the present invention
It is intended to；
Fig. 2 be a kind of employing rotary brush structure provided in an embodiment of the present invention dynamic lithium battery group equalizing system in
Weighing apparatus control module and the schematic diagram of balanced execution circuit part.
Specific embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based on this
Inventive embodiment, the every other enforcement obtained under the premise of creative work is not made by those of ordinary skill in the art
Example, belongs to protection scope of the present invention.
Embodiment
The embodiment of the present invention provides a kind of dynamic lithium battery group equalizing system of employing rotary brush structure, as shown in figure 1,
The system mainly includes：Rotary brush structure, equalization control module and balanced execution circuit.
1st, the rotary brush structure, is connected to different cells for switching the balanced execution circuit
On.
The rotary brush structure is by brush (a pair of the arcs electricity of inner circle part in Fig. 1 that can be rotated by motor for a pair
Brush) and it is fixed on some contact chips that the brush periphery is circumferentially distributed (cylindrical some arc contact chips, concrete number in Fig. 1
Amount can determine according to demand) composition；Specifically：
The position of some contact chips in the rotary brush structure is fixed and individually each with series battery
One end of cell is connected, a pair of brushes in the rotary brush structure by with two adjacent contact chips contact come
It is connected with the positive and negative polarities of a certain cell, and when the rotary brush structure drives brush rotation by a direct current generator
When, whenever brush is contacted with two adjacent contact chips, can make a pair of brushes respectively with a certain cell positive and negative two
Extremely it is connected, and keeps polarity constant；Specifically：When brush is rotated by motor, a pair of brushes successively with it is fixed around
Each contact chip contacts, and contact is the transient state in the short time；Due to rotation, brush can at once with direction of rotation on it is next
Individual contact chip contacts, and forms new transient state；In each above-mentioned transient state, this pair of brushes can respectively with a monomer
The effect that battery positive and negative polarities connect.
2nd, the equalization control module, for detecting the state of current monolithic battery, and according to the shape of current monolithic battery
The comparative result output control logic of state and whole group battery status.
Specifically, the equalization control module is connected with a pair of brushes in the rotary brush structure, by driving
Brush rotation allows the equalization control module to be individually connected with the positive and negative polarities of each cell；It is current for obtaining
The average voltage level of the magnitude of voltage and whole group battery of cell, and compare the magnitude relationship of the two；If current monolithic battery
Magnitude of voltage then exports high level higher than the average voltage of whole group battery, if the magnitude of voltage of current monolithic battery is less than whole group battery
Average voltage then export low level, its output high level with low level as the control logic to balanced execution circuit.
3rd, the balanced execution circuit, for being charged to current connected cell according to the control logic
Or electric discharge, realize the equilibrium of set of cells.
Specifically, the balanced execution circuit is connected with a pair of brushes in the rotary brush structure, by driving
Brush rotation allows the balanced execution circuit to be individually connected with the positive and negative polarities of each cell.
The balanced execution circuit includes：Energy-storage travelling wave tube and connection brush are returned with the charging and discharging two of energy-storage travelling wave tube
Road：Wherein：
Contain Voltage stabilizing module in charge circuit, the controlled logic control of the Voltage stabilizing module, when control logic is high level
Voltage stabilizing charging operations are performed, is charged from current connected cell to energy-storage travelling wave tube；
Discharge loop contains a controlled switch, is controlled the control of logic, closes when control logic is low level
Discharge loop, makes energy-storage travelling wave tube be discharged to current connected cell.
For the ease of representing in above-mentioned Fig. 1, equalization control module is integrated into into One function mould with balanced execution circuit
Block.Equalization control module refers to Fig. 2 with the detailed construction of balanced execution circuit.
As shown in Fig. 2 a pair of brushes in rotary brush structure respectively with equalization control module, balanced execution circuit
Charge circuit is connected with discharge loop.
Equalization control module gathers the average voltage letter of the information of voltage and whole group battery of current monolithic battery by brush
Breath, and both comparative results are exported as control logic；The control logic of output is divided into two-way, all the way with balanced execution circuit
The Voltage stabilizing module (booster circuit) of middle charge circuit is connected, and enables signal as which；Another road then through a not gate with it is balanced
In execution circuit, the controlled switch (optical coupled switch) of discharge loop is connected, used as its switching signal.
The equalization control module is external connection battery management system, or itself embedded control unit and voltage acquisition list
Unit, or build certainly filtering comparison circuit.Specifically：
1) build certainly filtering comparison circuit and realize that the process of above-mentioned functions is as follows：A RC network is built, is realized in brush
Low-pass filtering is carried out to the magnitude of voltage of different monomers battery in rotary course, so as to obtain the meansigma methodss of whole group voltage, then via
The comparison circuit that one amplifier is built is compared with whole group average voltage to current monolithic voltage, obtains comparative result.
2) itself embedded control unit and voltage acquisition unit realize that the process of above-mentioned functions is as follows：By with brush
Rotation and realize the collection to each monomer battery voltage of set of cells, such that it is able to carry out the calculating of whole group average voltage,
Further current monolithic voltage is made with whole group average voltage and being compared.
3) external connection battery management system realizes that the process of above-mentioned functions is as follows：There is provided current by external battery management system
The average voltage information of the information of voltage and whole group battery of cell, and then make multilevel iudge.
Described balanced execution circuit is divided into charge circuit, discharge loop and energy-storage travelling wave tube.Wherein, energy-storage travelling wave tube preferably surpasses
Level electric capacity；In the case that charge circuit is for being higher than whole group average voltage in current monolithic cell voltage, battery is made to super electricity
Capacity charge, wherein containing a Voltage stabilizing module, for lifting the efficiency of charging process, the module preferably insults Li Teer companies
LTC3128 chips coordinate interlock circuit to build；Discharge loop in current monolithic cell voltage less than whole group average voltage
In the case of, super capacitor is made to battery discharge, wherein containing a controlled switch, preferred PANASONIC PhotoMos series
AQY272 chips, for controlling the break-make of discharge loop.
In the embodiment of the present invention, during balancing procedure, each monomer of set of cells can be obtained by external connection battery management system
Battery voltage information, if difference therebetween is higher than given threshold, opens motor, drives brush rotation, performs equalization operation；Its
Obtain once each monomer battery voltage situation afterwards at regular intervals, until difference is less than threshold value, close motor, stop rotation
Turn, terminate balancing procedure.
In the such scheme of the embodiment of the present invention, replace electrical switch using rotary brush structure to realize circuit switching,
Simple structure, easy to operate, the elements caused due to adopting electrical switch in a large number during existing equalizing circuit scheme can be solved
Quantity is more, and circuit complexity is high, controls difficulty problem；Meanwhile, restriction of the electrical switch to euqalizing current can be released,
Brush structure increases euqalizing current under conditions of allowing, improve speed in a balanced way；Using the energy-storage travelling wave tubes such as super capacitor and voltage stabilizing
Charging module, improves the efficiency of energy transfer, obtains stable portfolio effect.
Those skilled in the art can be understood that, for convenience and simplicity of description, only with above-mentioned each function
The division of module is illustrated, and in practical application, can distribute above-mentioned functions by different function moulds as desired
Block is completed, will the internal structure of system be divided into different functional modules, to complete all or part of work(described above
Energy.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
Should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (4)
1. the dynamic lithium battery group equalizing system of a kind of employing rotary brush structure, it is characterised in that the system includes：Electric rotating
Brush configuration, equalization control module and balanced execution circuit；Wherein：
The rotary brush structure, by the brush that can be rotated by motor for a pair and is fixed on the brush periphery and is circumferentially distributed
Some contact chips composition, be connected to different cells for switching the balanced execution circuit；
The equalization control module, for detecting the state of current monolithic battery, and the state according to current monolithic battery with it is whole
The comparative result output control logic of Battery pack state；
The balanced execution circuit, for current connected cell being charged or being put according to the control logic
Electricity, realizes the equilibrium of set of cells.
2. the dynamic lithium battery group equalizing system of a kind of employing rotary brush structure according to claim 1, its feature exist
In the position of some contact chips in the rotary brush structure is fixed and individually electric with each monomer of series battery
The one end in pond is connected, i.e., one contact chip is connected with one end of a cell；A pair in the rotary brush structure are electric
Brush is connected with the positive and negative polarities of a certain cell by being contacted with two adjacent contact chips, and works as the rotary brush
When structure drives brush to rotate by a direct current generator, whenever brush is contacted with two adjacent contact chips, one can be made
Brush is connected with the positive and negative polarities of a certain cell respectively, and keeps polarity constant.
3. the dynamic lithium battery group equalizing system of a kind of employing rotary brush structure according to claim 1, its feature exist
In the equalization control module is connected with a pair of brushes in the rotary brush structure, causes institute by driving brush to rotate
State equalization control module to be individually connected with the positive and negative polarities of each cell；
The equalization control module is external connection battery management system, or itself embedded control unit and voltage acquisition unit,
Or build certainly filtering comparison circuit；For detecting the average voltage level of the magnitude of voltage and whole group battery of current monolithic battery, and
Compare the magnitude relationship of the two；High electricity is exported if the magnitude of voltage of current monolithic battery is higher than the average voltage of whole group battery
It is flat, low level is exported if the magnitude of voltage of current monolithic battery is less than the average voltage of whole group battery, the high level of its output
With low level as the control logic to balanced execution circuit.
4. the dynamic lithium battery group equalizing system of a kind of employing rotary brush structure according to claim 1 or 2 or 3, its
It is characterised by, the balanced execution circuit is connected with a pair of brushes in the rotary brush structure, by driving brush rotation
The balanced execution circuit is individually connected with the positive and negative polarities of each cell；
The balanced execution circuit includes：Two loops of charging and discharging of energy-storage travelling wave tube and connection brush and energy-storage travelling wave tube：
Wherein：
Contain Voltage stabilizing module in charge circuit, the controlled logic control of the Voltage stabilizing module is performed when control logic is high level
Voltage stabilizing charging operations, are charged from current connected cell to energy-storage travelling wave tube；
Discharge loop contains a controlled switch, is controlled the control of logic, the closure electric discharge when control logic is low level
Loop, makes energy-storage travelling wave tube be discharged to current connected cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510277980.4A CN104836307B (en) | 2015-05-26 | 2015-05-26 | Power lithium battery pack balanced system adopting rotary brush structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510277980.4A CN104836307B (en) | 2015-05-26 | 2015-05-26 | Power lithium battery pack balanced system adopting rotary brush structure |
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| Publication Number | Publication Date |
|---|---|
| CN104836307A CN104836307A (en) | 2015-08-12 |
| CN104836307B true CN104836307B (en) | 2017-05-03 |
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| CN201510277980.4A Expired - Fee Related CN104836307B (en) | 2015-05-26 | 2015-05-26 | Power lithium battery pack balanced system adopting rotary brush structure |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086220B (en) * | 2019-04-18 | 2021-10-22 | 重庆宜邦科技有限责任公司 | Periodic voltage balancing method for single batteries of energy storage battery pack |
| CN110696625A (en) * | 2019-11-18 | 2020-01-17 | 珠海格力电器股份有限公司 | Control method of battery management system and active balancing topology device |
| CN113767538B (en) * | 2020-05-07 | 2024-05-10 | 深圳市大疆创新科技有限公司 | Battery management apparatus, system, battery, mobile device, and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645610A (en) * | 2009-09-03 | 2010-02-10 | 深圳市晖谱能源科技有限公司 | Device for equalizing charge of battery and method thereof |
| CN102280912A (en) * | 2011-06-10 | 2011-12-14 | 深圳市金威源科技股份有限公司 | Equalization circuit of charge and discharge circuit of battery pack |
| CN103326439A (en) * | 2013-06-28 | 2013-09-25 | 安科智慧城市技术（中国）有限公司 | Equalization circuit of battery pack and equalization method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8994331B2 (en) * | 2012-05-31 | 2015-03-31 | Motorola Solutions, Inc. | Method and apparatus for adapting a battery voltage |
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2015
- 2015-05-26 CN CN201510277980.4A patent/CN104836307B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645610A (en) * | 2009-09-03 | 2010-02-10 | 深圳市晖谱能源科技有限公司 | Device for equalizing charge of battery and method thereof |
| CN102280912A (en) * | 2011-06-10 | 2011-12-14 | 深圳市金威源科技股份有限公司 | Equalization circuit of charge and discharge circuit of battery pack |
| CN103326439A (en) * | 2013-06-28 | 2013-09-25 | 安科智慧城市技术（中国）有限公司 | Equalization circuit of battery pack and equalization method |
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| CN104836307A (en) | 2015-08-12 |
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Granted publication date: 20170503 |