CN106655305A - Voltage active equalization circuit for a single battery of storage batteries - Google Patents
Voltage active equalization circuit for a single battery of storage batteries Download PDFInfo
- Publication number
- CN106655305A CN106655305A CN201510728687.5A CN201510728687A CN106655305A CN 106655305 A CN106655305 A CN 106655305A CN 201510728687 A CN201510728687 A CN 201510728687A CN 106655305 A CN106655305 A CN 106655305A
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- Prior art keywords
- battery
- circuit
- oxide
- semiconductor
- metal
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Classifications
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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
-
- 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 invention belongs to the technical field of storage batteries, and concretely relates to a voltage active equalization circuit for a single battery of storage batteries. The voltage active equalization circuit comprises a battery selection circuit and a battery charge and discharge circuit. The battery selection circuit adopts a control chip and a bidirectional MOS transistor to select one battery from six batteries and enable the battery to be connected with the battery charge and discharge circuit. The battery charge and discharge circuit charges or discharges the selected battery through a bidirectional DC/DC technique. When the MOS tube selects the first battery, an MOS transistor Q23 pathway and an MOS transistor Q29 pathway are closed at the same time, the Q23 is connected with the anode of the electrode, and the Q29 is connected with the cathode of the battery. The anode of the battery and an anode of the charge and discharge circuit are connected through a Q3 pathway on the MOS transistor. The cathode of the battery and a cathode of a battery end of the charge and discharge circuit are connected through a channel below an MOS transistor Q7.
Description
Technical field
The invention belongs to battery technology field, and in particular to a kind of single battery cell voltage is actively
Weighing apparatus circuit.
Background technology
Existing cell balancing is divided into active equalization technology and the big class of passive balancing technique two.
(1) passive type is balanced
Passive equilibrium is a kind of simple balancing technique, is that single battery core is simply discharged or filled
Electricity.Discharge type equilibrium is by individually consuming the higher battery core energy of voltage, cell voltage having been reached
The effect of balance.Rechargeable equilibrium is individually mended by the battery core relatively low to voltage in charging process
Electricity, has reached the effect of voltage balance of battery.
Passive type equilibrium general equilibrium electric current is all smaller, and equalization efficiency is low, portfolio effect is not obvious.Electric discharge
Formula equilibrium consumes the energy content of battery, and actually one kind of the energy is wasted.Rechargeable equilibrium can only fill
Carry out when electric, portfolio effect cannot be realized during electric discharge.Passive balanced is differed in solution battery initial capacity
There is certain effect during the problem of cause, and cannot solve the problems, such as that battery actual capacity is inconsistent.
(2) active equilibrium
Active equilibrium is a kind of balancing technique of high-efficiency environment friendly, by low with voltage in the high battery of voltage
Battery between carry out energy transfer and realize the balance of voltage.The electric energy transfer formula battery equalizer (patent No.
201220153997.0) it is exactly a kind of active balancing technique of battery.Use energy between adjacent cell
The technology of transfer.Two pieces of adjacent battery B1 of hypothesis and B2, B1 voltage are higher than B2 voltages.First equal
Part electric energy under the control of weighing apparatus in battery B1 first flows into the energy-storage travelling wave tube in balanced device, now balanced device
Equivalent to one piece of battery, energy is stored.Then the energy of storage is discharged under the control of balanced device
Battery B2 is charged, now balanced device is equivalent to a charger.Realized by above method adjacent
Energy transfer between battery.
Electric energy transfer formula battery equalizer is to realize the balance of voltage by shifting the energy between adjacent cell
's.When two pieces of cell voltages apart from each other in a Battery pack are inconsistent, need to carry out energy repeatedly
Transfer.With the increase of battery distance, energy transfer number of times is consequently increased, and the balanced time used is elongated,
The energy being lost in energy transfer simultaneously is consequently increased, and equalization efficiency can be more and more lower.Electric energy transfer formula
Battery equalizer will be continuously increased with the increase of battery serial number, module number.For example：There are 2 sections
Battery series connection needs 1 module；There is the series connection of 3 batteries to need 2 modules；There are N+1 batteries to connect
Need N number of module.Hundreds of batteries series connection is generally required in high-tension battery modules, it would be desirable to several
Hundred modules, equalizing system will become very complicated, and hardware cost and volume are consequently increased.
The content of the invention
The purpose of the present invention is not enough for prior art, there is provided one kind ensures cell electricity in battery pack
Pressure is consistent, improves battery pack whole volume and extends battery pack service life, improves equalization efficiency, reduces
Energy loss in balancing procedure, realizes energy-conserving and environment-protective, improves euqalizing current, strengthens portfolio effect, most
The prolongation battery of limits simplifies equalizing circuit, reduces the complexity of system, improves system
Realizability, so as to reduce the single battery cell voltage active equalization circuit of system cost and volume.
The technical scheme is that：
A kind of single battery cell voltage active equalization circuit, including battery selection circuit and battery charge and discharge
Circuit；The battery selection circuit is realized being selected from 6 batteries using control chip and bi-directional MOS pipe
Select wherein 1 batteries and be connected to battery charge-discharge circuit；The battery charge-discharge circuit is using two-way
DC/DC technologies realize that selected battery is charged or is discharged.
Control chip in the battery selection circuit is that 1 battery selects chip EMB1428Q.
Metal-oxide-semiconductor is SI7938DP in the battery selection circuit, and pipe quantity is 9.
When the metal-oxide-semiconductor selects Section 1 battery, metal-oxide-semiconductor Q23 and metal-oxide-semiconductor Q29 is closed at
Two paths, Q23 connection anodes, Q29 connection GNDs；Described anode passes through MOS
Q3 passages on pipe are turned on charge-discharge circuit positive pole；The GND is by below metal-oxide-semiconductor Q7
Passage and charge-discharge circuit battery-end negative pole turn on.
When the metal-oxide-semiconductor selects Section 2 battery, metal-oxide-semiconductor Q23 and metal-oxide-semiconductor Q21 is closed at
Two paths, Q23 is connected to GND, and Q21 is connected to anode；GND is by closing
Close Q3 channel below to turn on charge-discharge circuit battery-end negative pole；Anode is by closing above Q7
Passage and charge-discharge circuit battery-end positive pole turn on.
The discharge circuit is bidirectional, dc to DC converting circuit, including transformer, power management chip
And metal-oxide-semiconductor；When interlocking signal CTL is set to low level when battery is charged, only power management core
Piece U27 receives pwm signal；U27 makes charging by the dutycycle of control metal-oxide-semiconductor switching signal
Electric current reaches setting value.
The invention has the beneficial effects as follows：
(1) energy loss is low, energy-conserving and environment-protective.Charge-discharge circuit high conversion efficiency, reaches through testing efficiency
To more than 90%；
(2) control flexibly, can select the battery of optional position in battery pack individually carries out equilibrium.Directly
Discharge and recharge is carried out to voltage highest and minimum battery, without middle transition；
(3) euqalizing current is big, and portfolio effect is obvious.At present euqalizing current is 5A, by changing device
Equalization parameter electric current can also be improved.By using checking, battery capacity can be obviously improved.
(4) modularized design, autgmentability is strong, cost-effective.Each equalizing circuit is a module, often
Individual module can carry out management of charging and discharging to 6 batteries.For the battery pack of many string numbers only need to simply increase
Plus module number.
Description of the drawings
Fig. 1 is single battery cell voltage active equalization circuit total figure；
Fig. 2 is battery selection circuit battery selection circuit schematic diagram；
Fig. 3 is charge-discharge circuit schematic diagram.
Specific embodiment
It is actively equal to a kind of single battery cell voltage proposed by the present invention with embodiment below in conjunction with the accompanying drawings
Weighing apparatus circuit is further introduced：
A kind of single battery cell voltage active equalization circuit, including battery selection circuit and battery charge and discharge
Circuit；The battery selection circuit is realized being selected from 6 batteries using control chip and bi-directional MOS pipe
Select wherein 1 batteries and be connected to battery charge-discharge circuit；The battery charge-discharge circuit is using two-way
DC/DC technologies realize that selected battery is charged or is discharged.
Control chip in the battery selection circuit is that 1 battery selects chip EMB1428Q.
Metal-oxide-semiconductor is SI7938DP in the battery selection circuit, and pipe quantity is 9.
When the metal-oxide-semiconductor selects Section 1 battery, metal-oxide-semiconductor Q23 and metal-oxide-semiconductor Q29 is closed at
Two paths, Q23 connection anodes, Q29 connection GNDs；Described anode passes through MOS
Q3 passages on pipe are turned on charge-discharge circuit positive pole；The GND is by below metal-oxide-semiconductor Q7
Passage and charge-discharge circuit battery-end negative pole turn on.
When the metal-oxide-semiconductor selects Section 2 battery, metal-oxide-semiconductor Q23 and metal-oxide-semiconductor Q21 is closed at
Two paths, Q23 is connected to GND, and Q21 is connected to anode；GND is by closing
Close Q3 channel below to turn on charge-discharge circuit battery-end negative pole；Anode is by closing above Q7
Passage and charge-discharge circuit battery-end positive pole turn on.
The discharge circuit is bidirectional, dc to DC converting circuit, including transformer, power management chip
And metal-oxide-semiconductor；When interlocking signal CTL is set to low level when battery is charged, only power management core
Piece U27 receives pwm signal；U27 makes charging by the dutycycle of control metal-oxide-semiconductor switching signal
Electric current reaches setting value.
Battery selection circuit as shown in figure 1, it is main by 1 battery select chip (EMB1428Q) and
9 bi-directional MOS pipe (SI7938DP) compositions.Battery selects chip to receive single-chip microcomputer by SPI communication
Instruction, makes the both positive and negative polarity of specific battery rectify with the battery of charge-discharge circuit by closing corresponding metal-oxide-semiconductor
Negative pole is turned on.So as to reach the purpose of battery selection.Battery selects chip to have logical interlock function, receives
Calculate pin output state automatically to after instruction, it is ensured that two batteries will not be also turned on, cause battery short
Road or other harm.Battery selects chip pin output voltage to possess from lifting function, such that it is able to control
The metal-oxide-semiconductor of 9 different voltage platforms., using two-way type, electric current can be with any direction stream for metal-oxide-semiconductor
It is dynamic, so as to realize the charging and discharging function to battery.Metal-oxide-semiconductor gate logic is as follows：Select Section 1
During battery, the two paths of metal-oxide-semiconductor Q23 and metal-oxide-semiconductor Q29 are closed at, now Q23 connections
To anode, Q29 is connected to GND.By closing the passage above metal-oxide-semiconductor Q3, electricity is made
Pond positive pole is turned on charge-discharge circuit battery-end positive pole.By closing metal-oxide-semiconductor Q7 channel below, make
GND is turned on charge-discharge circuit battery-end negative pole.When selecting Section 2 battery, MOS is closed at
The two paths of pipe Q23 and metal-oxide-semiconductor Q21, now Q23 be connected to GND, Q21 is connected to
Anode.By closing Q3 channel below, GND and charge-discharge circuit battery-end negative pole are made
Conducting.By closing the passage above Q7, anode is set to turn on charge-discharge circuit battery-end positive pole.
When selecting other batteries by that analogy.
Charge-discharge circuit as shown in Fig. 2 be a kind of two-way DC-to-DC (DC/DC) change-over circuit,
Mainly it is made up of transformer, power management chip, metal-oxide-semiconductor.This circuit possesses logical interlock function, protects
Card synchronization only one of which power management chip can receive pwm signal, so as to avoid two electricity
The situation that source control chip works simultaneously.Interlocking signal CTL is set into low level when being charged to battery,
Now power management chip U27 can receive pwm signal, and power management chip U26 can not be received
Pwm signal.U27 makes charging current reach setting by the dutycycle of control metal-oxide-semiconductor switching signal
Value.So as to realize the function that busbar voltage charges to cell.Can by changing the resistance of sampling resistor
To adjust charging current.Interlocking signal CTL is set into low Gao Ping when discharging battery, now
Power management chip U26 can receive pwm signal, and power management chip U27 can not receive PWM
Signal.U26 makes discharge current reach setting value by the dutycycle of control metal-oxide-semiconductor switching signal.From
And realize the function that cell discharges busbar voltage.Can be adjusted by changing the resistance of sampling resistor
Discharge current size.The PWM that the switching signal maximum duty cycle of power management chip output is not higher than input into
Signal, so as to many to charging and discharging currents one layer of protections.Power management chip can automatically adjust electric current,
Closed-loop control is realized to electric current, current ripples are little, high conversion efficiency.Simultaneously power management chip possessed
Stream defencive function, it is to avoid high current causes to damage to battery.Improve the dependable with function of system.
Claims (6)
1. a kind of single battery cell voltage active equalization circuit, it is characterised in that：Including
Battery selection circuit and battery charge-discharge circuit；The battery selection circuit using control chip and
Bi-directional MOS pipe is realized selecting wherein 1 batteries to be connected to battery charging and discharging from 6 batteries
Circuit；The battery charge-discharge circuit is realized to selected electricity using two-way DC/DC technologies
Pond is charged or discharges.
2. a kind of single battery cell voltage active equalization circuit as claimed in claim 1,
It is characterized in that：Control chip in the battery selection circuit is that 1 battery selects chip
EMB1428Q。
3. a kind of single battery cell voltage active equalization circuit as claimed in claim 1,
It is characterized in that：Metal-oxide-semiconductor is SI7938DP in the battery selection circuit, and pipe quantity is 9
It is individual.
4. a kind of single battery cell voltage active equalization circuit as claimed in claim 1,
It is characterized in that：When the metal-oxide-semiconductor selects Section 1 battery, metal-oxide-semiconductor Q23 is closed at
With two paths of metal-oxide-semiconductor Q29, Q23 connection anodes, Q29 connection GNDs；
Described anode is turned on by the Q3 passages on metal-oxide-semiconductor with charge-discharge circuit positive pole；
The GND is by metal-oxide-semiconductor Q7 channel below and charge-discharge circuit battery-end negative pole
Conducting.
5. a kind of single battery cell voltage active equalization circuit as claimed in claim 1,
It is characterized in that：When the metal-oxide-semiconductor selects Section 2 battery, metal-oxide-semiconductor Q23 is closed at
With the two paths of metal-oxide-semiconductor Q21, Q23 is connected to GND, and Q21 is connected to battery
Positive pole；GND is led by closing Q3 channel below with charge-discharge circuit battery-end negative pole
It is logical；Anode is turned on by the passage above closure Q7 and charge-discharge circuit battery-end positive pole.
6. a kind of single battery cell voltage active equalization circuit as claimed in claim 1,
It is characterized in that：The discharge circuit is bidirectional, dc to DC converting circuit, including transformer,
Power management chip and metal-oxide-semiconductor；Interlocking signal CTL is set to low level when battery is charged
When, only power management chip U27 receives pwm signal；U27 is by controlling metal-oxide-semiconductor
The dutycycle of switching signal, makes charging current reach setting value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510728687.5A CN106655305A (en) | 2015-10-30 | 2015-10-30 | Voltage active equalization circuit for a single battery of storage batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510728687.5A CN106655305A (en) | 2015-10-30 | 2015-10-30 | Voltage active equalization circuit for a single battery of storage batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106655305A true CN106655305A (en) | 2017-05-10 |
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ID=58810715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510728687.5A Pending CN106655305A (en) | 2015-10-30 | 2015-10-30 | Voltage active equalization circuit for a single battery of storage batteries |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111262445A (en) * | 2020-03-11 | 2020-06-09 | 南京奥云德电子科技有限公司 | Isolated bidirectional DC-DC converter |
| CN112526380A (en) * | 2020-11-19 | 2021-03-19 | 许继集团有限公司 | Battery management unit equalization efficiency test method and system |
| CN112994170A (en) * | 2021-03-26 | 2021-06-18 | 浙江高泰昊能科技有限公司 | BMS active equalization circuit and working method thereof |
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| US20110079263A1 (en) * | 2009-10-02 | 2011-04-07 | Tigo Energy, Inc. | Systems and Methods to Provide Enhanced Diode Bypass Paths |
| CN102122836A (en) * | 2011-04-01 | 2011-07-13 | 北京航空航天大学 | Charging/discharging active equalization circuit for lithium ion power battery pack |
| CN204615434U (en) * | 2015-03-31 | 2015-09-02 | 北京波士顿动力电池有限公司 | The two-way active equalization system of a kind of Li-ion batteries piles based on forward converter |
-
2015
- 2015-10-30 CN CN201510728687.5A patent/CN106655305A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110079263A1 (en) * | 2009-10-02 | 2011-04-07 | Tigo Energy, Inc. | Systems and Methods to Provide Enhanced Diode Bypass Paths |
| CN102122836A (en) * | 2011-04-01 | 2011-07-13 | 北京航空航天大学 | Charging/discharging active equalization circuit for lithium ion power battery pack |
| CN204615434U (en) * | 2015-03-31 | 2015-09-02 | 北京波士顿动力电池有限公司 | The two-way active equalization system of a kind of Li-ion batteries piles based on forward converter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111262445A (en) * | 2020-03-11 | 2020-06-09 | 南京奥云德电子科技有限公司 | Isolated bidirectional DC-DC converter |
| CN111262445B (en) * | 2020-03-11 | 2022-12-20 | 南京奥云德电子科技有限公司 | Isolated bidirectional DC-DC converter |
| CN112526380A (en) * | 2020-11-19 | 2021-03-19 | 许继集团有限公司 | Battery management unit equalization efficiency test method and system |
| CN112526380B (en) * | 2020-11-19 | 2024-04-16 | 许继集团有限公司 | Battery management unit balance efficiency test method and system |
| CN112994170A (en) * | 2021-03-26 | 2021-06-18 | 浙江高泰昊能科技有限公司 | BMS active equalization circuit and working method thereof |
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