CN109980728A - A kind of electric quantity equalizing system and method for Li-ion batteries piles - Google Patents
A kind of electric quantity equalizing system and method for Li-ion batteries piles Download PDFInfo
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- CN109980728A CN109980728A CN201910255241.3A CN201910255241A CN109980728A CN 109980728 A CN109980728 A CN 109980728A CN 201910255241 A CN201910255241 A CN 201910255241A CN 109980728 A CN109980728 A CN 109980728A
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- switch
- circuit
- battery
- battery core
- electric quantity
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- 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
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of electric quantity equalizing systems of Li-ion batteries piles, it includes multiple battery cores, multiple battery cores are set on series circuit, multiple first switches that quantity corresponds to battery core are provided on series circuit, multiple battery cores are set on parallel circuit simultaneously, parallel circuit includes multiple element circuits that quantity corresponds to battery core, there is lap between element circuit and series circuit, and on the lap that is set to of battery core, second switch and third switch are provided on element circuit, battery core is located between second switch and third switch.The present invention also provides a kind of electric quantity balancing methods of Li-ion batteries piles.The present invention can play the capacity of all battery cores compared to the prior art, play good portfolio effect, improve the discharging efficiency of battery pack.
Description
Technical field
The present invention relates to field of lithium ion battery, and in particular to a kind of electric quantity equalizing system of Li-ion batteries piles and side
Method.
Background technique
Li-ion batteries piles are made of several lithium-ion electric cores, battery core monomer voltage 3.7V, such as 135 battery cores series connection shapes
It can provide the voltage of 3.7*135=499.5V at battery pack, but because the difference of battery cell is mainly manifested in capacity volume variance, thus
The battery of low capacity after discharge when will appear bigger voltage drop, form short -board effect, whole group battery is by capacity minimum
Battery core influence, cause whole group battery capacity less than normal.
When the small battery core of capacity reaches electric discharge end, the biggish battery core of capacity still has remaining electricity that can not discharge, from
And whole group battery pack can not work.Traditional balanced way is energy consumption type balanced way, puts the larger battery core of capacity using resistance
Electricity plays the role of balanced battery core voltage, and conventional method cannot play the capacity of whole group battery core, while also generating the wave of energy
Take.
Summary of the invention
In consideration of it, can be played all the present invention provides a kind of electric quantity equalizing system of Li-ion batteries piles and method
The capacity of battery core plays good portfolio effect, improves the discharging efficiency of battery pack.
Thus, on the one hand, the present invention provides a kind of electric quantity equalizing systems of Li-ion batteries piles comprising Duo Ge electricity
Core, multiple battery cores are set on series circuit, and multiple first switches that quantity corresponds to battery core, Duo Ge electricity are provided on series circuit
Core is set on parallel circuit simultaneously, and parallel circuit includes multiple element circuits that quantity corresponds to battery core, element circuit with connect
There is lap between circuit, and on the lap that is set to of battery core, second switch and third are provided on element circuit
Switch, battery core are located between second switch and third switch.
Further, above-mentioned series circuit and parallel circuit constitute the circuit of triangle disposition structure.
Further, it is additionally provided with battery management unit, battery management unit is electrically connected multiple battery cores, each for identification
The working condition of battery core.
Further, when above-mentioned multiple battery cores do not work, battery management unit control disconnects multiple first switches, same to time control
System closure second switch and third switch, form parallel circuit.
Further, the control of above-mentioned battery management unit be closed multiple first switches, control simultaneously disconnect second switch and
Third switch, forms series circuit.
On the other hand, the present invention provides a kind of electric quantity balancing methods of Li-ion batteries piles comprising following steps:
1) when electrical appliance does not work, first switch is disconnected, second switch and third switch is closed, makes multiple in circuit
Battery core is in parallel connection, and self electric quantity is transferred in the low battery core of voltage by the high battery core of voltage, to make institute in circuit
There is the electric voltage equalization of battery core；
2) when electrical appliance works again, it is closed first switch, disconnects second switch and third switch, all battery cores are equal
It works under same operating voltage.
Further, when above-mentioned multiple battery cores do not work, battery management unit control disconnects multiple first switches, same to time control
System closure second switch and third switch, form parallel circuit.
Further, the control of above-mentioned battery management unit be closed multiple first switches, control simultaneously disconnect second switch and
Third switch, forms series circuit.
In the electric quantity equalizing system and method for a kind of Li-ion batteries piles provided by the present invention, do not work in electrical appliance
When, first switch can be disconnected, second switch and third switch are closed at, multiple battery cores in circuit is made to be in shape in parallel
State, by the parallel circuit of formation, the electricity of itself can be transferred in the low battery core of voltage by the high battery core of voltage, from
And make the electric voltage equalization in circuit between all battery cores, without generating energy dissipation；When electrical appliance works again, closure
First switch simultaneously switches off second switch and third switch, so that all battery cores carry out under same operating voltage
Work；
Thus, the present invention can play the capacity of all battery cores compared to the prior art, play good portfolio effect, mention
The discharging efficiency of high battery pack.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram of the electric quantity equalizing system of Li-ion batteries piles provided in an embodiment of the present invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Referring to Fig. 1, a kind of electric quantity equalizing system of Li-ion batteries piles provided in an embodiment of the present invention is shown in figure,
In be provided with multiple battery cores 1, the particular number of battery core 1 is depending on product, i.e., depending on the capacity of battery pack, multiple battery cores
1 is set on series circuit 2, and multiple first switches 21 that quantity corresponds to battery core 1 are provided on series circuit 2, and multiple battery cores 1 are same
When be set on parallel circuit 3, parallel circuit 3 includes that quantity correspond to multiple element circuits 31 of battery core 1, element circuit 31 with go here and there
Joining has lap between circuit 2, and on the lap that is set to of battery core 1, is provided with second switch on element circuit 31
32 and third switch 33, battery core 1 is between second switch 32 and third switch 33.
With continued reference to Fig. 1, wherein being also provided with battery management unit 4, battery management unit 4 is electrically connected multiple battery cores 1, uses
In the working condition for identifying each battery core 1, whether work including battery core 1 and the working conditions such as the capacity of battery core 1 determines.
As shown in connection with fig. 1, the embodiment of the present invention one provide a kind of Li-ion batteries piles electric quantity balancing method include with
Lower step:
1) when battery management unit 4 identifies that electrical appliance 5 does not work, the control of battery management unit 4 disconnects first switch 21,
It is closed second switch 32 and third switch 33, multiple battery cores 1 in circuit is made to be in parallel connection, the high battery core 1 of voltage will be certainly
Body electricity is transferred in the low battery core 1 of voltage, to make the electric voltage equalization of all battery cores 1 in circuit；
2) when electrical appliance 5 works again, the control closure first switch 21 of battery management unit 4 disconnects second switch 32
With third switch 33, all battery cores 1 work under same operating voltage.
With continued reference to Fig. 1, the circuit of series circuit 2 and the composition triangle disposition structure of parallel circuit 3, it is ensured that form string
Join the overlay segment of circuit 2 and parallel circuit 3, it is also ensured that integrally-built compactedness.
In the electric quantity equalizing system and method for a kind of Li-ion batteries piles provided by the present embodiment, do not work in electrical appliance
When, first switch can be disconnected, second switch and third switch are closed at, multiple battery cores in circuit is made to be in shape in parallel
State, by the parallel circuit of formation, the electricity of itself can be transferred in the low battery core of voltage by the high battery core of voltage, from
And make the electric voltage equalization in circuit between all battery cores, without generating energy dissipation；When electrical appliance works again, closure
First switch simultaneously switches off second switch and third switch, so that all battery cores carry out under same operating voltage
Work；
Thus, the present embodiment can play the capacity of all battery cores compared to the prior art, good portfolio effect is played,
Improve the discharging efficiency of battery pack.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (8)
1. a kind of electric quantity equalizing system of Li-ion batteries piles, which is characterized in that including multiple battery cores (1), the multiple battery core
(1) it is set on series circuit (2), quantity is provided on the series circuit (2) corresponds to multiple the first of the battery core (1) and open
It closes (21), the multiple battery core (1) is set on parallel circuit (3) simultaneously, and the parallel circuit (3) includes described in quantity is corresponding
Multiple element circuits (31) of battery core (1) have lap between the element circuit (31) and the series circuit (2),
And the battery core (1) is set on the lap, and second switch (32) and the are provided on the element circuit (31)
Three switches (33), the battery core (1) are located between the second switch (32) and third switch (33).
2. a kind of electric quantity equalizing system of Li-ion batteries piles according to claim 1, which is characterized in that the series electrical
Road (2) and the parallel circuit (3) constitute the circuit of triangle disposition structure.
3. a kind of electric quantity equalizing system of Li-ion batteries piles according to claim 1, which is characterized in that be additionally provided with electricity
Pond administrative unit (4), the battery management unit (4) are electrically connected the multiple battery core (1), for identification each battery core
(1) working condition.
4. a kind of electric quantity equalizing system of Li-ion batteries piles according to claim 3, which is characterized in that the multiple electricity
When core (1) does not work, battery management unit (4) control disconnects the multiple first switch (21), controls closure institute simultaneously
Second switch (32) and third switch (33) are stated, the parallel circuit (3) are formed.
5. a kind of electric quantity equalizing system of Li-ion batteries piles according to claim 3, which is characterized in that the cell tube
Reason unit (4) control is closed the multiple first switch (21), controls the disconnection second switch (32) and the third simultaneously
It switchs (33), forms the series circuit (2).
6. a kind of electric quantity balancing method of Li-ion batteries piles, which comprises the following steps:
1) it when electrical appliance (5) does not work, disconnects first switch (21), is closed second switch (32) and third switch (33), makes
Multiple battery cores (1) in circuit are in parallel connection, and self electric quantity is transferred to the low battery core of voltage by the high battery core of voltage (1)
(1) in, to make the electric voltage equalization of all battery cores (1) in circuit；
2) it when electrical appliance (5) works again, is closed first switch (21), disconnects second switch (32) and third switch (33),
All battery cores (1) work under same operating voltage.
7. a kind of electric quantity balancing method of Li-ion batteries piles according to claim 6, which is characterized in that the multiple electricity
When core (1) does not work, battery management unit (4) control disconnects the multiple first switch (21), controls closure institute simultaneously
Second switch (32) and third switch (33) are stated, is formed parallel circuit (3).
8. a kind of electric quantity balancing method of Li-ion batteries piles according to claim 6, which is characterized in that the cell tube
Reason unit (4) control is closed the multiple first switch (21), controls the disconnection second switch (32) and the third simultaneously
It switchs (33), is formed series circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255241.3A CN109980728A (en) | 2019-03-30 | 2019-03-30 | A kind of electric quantity equalizing system and method for Li-ion batteries piles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255241.3A CN109980728A (en) | 2019-03-30 | 2019-03-30 | A kind of electric quantity equalizing system and method for Li-ion batteries piles |
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| Publication Number | Publication Date |
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| CN109980728A true CN109980728A (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910255241.3A Pending CN109980728A (en) | 2019-03-30 | 2019-03-30 | A kind of electric quantity equalizing system and method for Li-ion batteries piles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829530A (en) * | 2019-11-14 | 2020-02-21 | 华中科技大学 | Battery pack performance balancing method and system |
| CN114039112A (en) * | 2021-11-26 | 2022-02-11 | 蜂巢能源科技(无锡)有限公司 | Battery cell SOC regulation and control device and regulation and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140996A (en) * | 2015-09-02 | 2015-12-09 | 国网上海市电力公司 | Lithium ion battery pack equalization management system and equalization control method |
| CN206340995U (en) * | 2016-11-21 | 2017-07-18 | 深圳市锐拓新源科技有限公司 | Battery modules and battery management system |
| CN107154656A (en) * | 2017-05-05 | 2017-09-12 | 安徽锐能科技有限公司 | Electric quantity balancing device and method between battery pack |
-
2019
- 2019-03-30 CN CN201910255241.3A patent/CN109980728A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140996A (en) * | 2015-09-02 | 2015-12-09 | 国网上海市电力公司 | Lithium ion battery pack equalization management system and equalization control method |
| CN206340995U (en) * | 2016-11-21 | 2017-07-18 | 深圳市锐拓新源科技有限公司 | Battery modules and battery management system |
| CN107154656A (en) * | 2017-05-05 | 2017-09-12 | 安徽锐能科技有限公司 | Electric quantity balancing device and method between battery pack |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829530A (en) * | 2019-11-14 | 2020-02-21 | 华中科技大学 | Battery pack performance balancing method and system |
| CN114039112A (en) * | 2021-11-26 | 2022-02-11 | 蜂巢能源科技(无锡)有限公司 | Battery cell SOC regulation and control device and regulation and control method thereof |
| CN114039112B (en) * | 2021-11-26 | 2023-10-20 | 蜂巢能源科技(无锡)有限公司 | Battery cell SOC regulating and controlling device and regulating and controlling method thereof |
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Application publication date: 20190705 |
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| RJ01 | Rejection of invention patent application after publication |