CN103715722B - A kind of power battery pack equalization maintenance system and method - Google Patents
A kind of power battery pack equalization maintenance system and method Download PDFInfo
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- 238000012423 maintenance Methods 0.000 title claims abstract description 54
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Abstract
The present invention is suitable for the equalized maintenance field of power battery pack, provide a kind of power battery pack equalization maintenance system and method, system includes data processing unit, the control unit being connected with data processing unit, battery set charge/discharge equipment, its charge-discharge end is connected with battery pack, and communication terminal is connected with control unit；Battery set charge/discharge equipment is used to carry out discharge and recharge to battery pack and gathers the magnitude of voltage and current value and N number of single battery charging equipment at battery pack both ends, the charge-discharge end of each single battery charging equipment is connected in the both ends of a single battery in parallel, and the communication terminal of each single battery charging equipment is connected with control unit；Each single battery charging equipment is used to charging to a single battery and gathering the magnitude of voltage and current value at a single battery both ends.Power battery pack equalization maintenance system and method provided by the invention, can be rapidly completed the equalized maintenance to battery pack, while the effect after maintenance is more stablized.
Description
Technical field
The present invention relates to the equalized maintenance field of power battery pack, more particularly to a kind of power battery pack equalization maintenance system
And method.
Background technology
At present, the outstanding advantage with new energy in terms of energy conservation and environmental protection, energy-accumulating power station, electric automobile, medical treatment and industry
Relevant device generally uses battery as energy storage device.Since the voltage of single battery is unable to reach power demands, generally
Single battery is together in series and to form series battery and is used.
Due to single battery, the difference of used raw material and technique is difficult to ensure that each of single battery during fabrication
The many reasons such as inconsistent of the uniformity or single battery of parameter temperature in use and degree of aging,
So as to cause the inconsistent of the charging capacity of single battery in series battery or discharge capacity, that is, cause the appearance of single battery
Amount and voltage are inconsistent.
The capacity of single battery in series battery and the inconsistent normal use that will influence battery pack of voltage,
It will be damaged when serious and cause the damage of single battery the dangerous situation such as even burn, explode.
To solve the capacity that occurs in use of single battery in series battery and voltage is inconsistent asks
Topic, the prior art provide the equalized maintenance technology of some power battery packs, but the power battery pack that is provided of the prior art
Equalized maintenance technology exist consuming when carrying out equalized maintenance overlong time and equalized maintenance after effect unstable etc. ask
Topic.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of power battery pack equalization maintenance system and method, it is intended to solves
The overlong time of consuming when the equalized maintenance technology of power battery pack provided in the prior art is in the presence of progress equalized maintenance,
The problems such as portfolio effect is unstable and usage time is of short duration.
The embodiment of the present invention is achieved in that a kind of power battery pack equalization maintenance system, and by N number of single battery string
The battery pack connection of connection composition, including：Data processing unit；The control unit being connected with the data processing unit；Battery pack
Charging/discharging apparatus, its charge-discharge end are connected with the battery pack, and communication terminal is connected with described control unit, and power end is used for and friendship
Galvanic electricity source connects；The battery set charge/discharge equipment is used to carry out discharge and recharge to battery pack and gathers the electricity at the battery pack both ends
Pressure value and current value；And N number of single battery charging equipment, the charge-discharge end of each single battery charging equipment are connected in parallel
At the both ends of a single battery, the communication terminal of each single battery charging equipment is connected with described control unit, power end
For being connected with AC power；Each single battery charging equipment is used to charging to a single battery and gathering one
The magnitude of voltage and current value at single battery both ends；The N is the positive integer more than or equal to 2 and less than or equal to 500；During work, control
Unit processed is by the magnitude of voltage at the battery pack both ends and current value and the magnitude of voltage and current value at each single battery both ends
Feed back to the data processing unit；The data processing unit by the magnitude of voltage received and current value and default threshold value into
Row compares and sends instruction according to comparative result；Described control unit battery set charge/discharge according to described instruction output control
Charging current of the equipment to the charging current of the battery pack and the single battery charging equipment to single battery so that every
A single battery equalizaing charge.
Further, the battery set charge/discharge equipment is total by the communication that CAN bus or RS232 or RS485 are formed
Line is connected with the data processing unit.
Further, N number of single battery charging equipment CAN bus or RS232 or RS485 respectively by being made of
Communication bus be connected with the data processing unit.
Present invention also offers a kind of balanced dimension of power battery pack based on above-mentioned power battery pack equalization maintenance system
Maintaining method, comprises the following steps：
S1：Charge step：
S11：The battery set charge/discharge equipment carries out the battery pack with the maximum rated current of the single battery
Constant-current charge；
S12：While with the step S11, the single battery charging equipment is with its maximum output current to the list
Body battery carries out constant-current charge；
S2：Judge whether to have in the battery pack magnitude of voltage of a single battery to exceed first voltage threshold value；If so, then
S3 is entered step, if it is not, being then back to step S11；
S3：The charging current of the battery set charge/discharge equipment is adjusted to m/mono- of the maximum rated current, institute
It is the positive integer more than or equal to 2 to state m；
S4：Whether the charging current of the battery set charge/discharge equipment after being adjusted in judgment step S3 is the first electricity
Threshold value is flowed, if so, then the battery set charge/discharge equipment is stopped, if it is not, being then back to step S2；
S5：Judge whether the voltage capacity value of each single battery reaches first voltage threshold value, if so, then entering step
S6, if it is not, being then back to step S12；
S6：The single battery charging equipment charges the single battery with constant voltage mode；
S7：Judge whether single battery electric current is reduced to the second current threshold, if so, then single battery charging equipment stops
Work；If it is not, then it is back to step S6.
Further, in step s 12, the maximum output current of the single battery charging equipment is according to battery pack
Type and customer requirement setting.
Further, the first voltage threshold value is the maximum rated voltage of single battery；The first voltage threshold value
Set according to the type of battery pack and customer requirement.
Further, first current threshold is the lower limit threshold of the charging current of the battery set charge/discharge equipment
Value；First current threshold is zero to any value between the maximum output current of the single battery charging equipment.
Further, second current threshold is set according to the type and customer requirement of battery pack.
Power battery pack equalization maintenance system and method provided by the invention, wherein the equalized maintenance system include being used for
The battery set charge/discharge equipment of discharge and recharge is carried out to battery pack, for being charged to multiple single batteries and being examined respectively respectively
Multiple single battery charging equipments of multiple monomer battery voltages are surveyed, for controlling the battery set charge/discharge equipment and monomer
The control device of battery charging equipment；The equalized maintenance method is charged by battery set charge/discharge equipment and single battery first
Equipment is charged using the maximum rated current of single battery as single battery carries out constant-current charge, when single battery reaches maximum rated
Progressively reduce the charging current of battery set charge/discharge equipment during voltage, further, reach the single battery of maximum rated voltage
Corresponding single battery charging equipment switchs to constant-voltage charge by constant-current charge, until the magnitude of voltage of whole single batteries is held at
During maximum rated voltage, terminate equalized maintenance.Compared with prior art, power battery pack equalization maintenance system provided by the invention
And method, the equalized maintenance to battery pack can be rapidly completed, while the effect after maintenance is more stablized.
Brief description of the drawings
Fig. 1 is the functional block diagram of power battery pack equalization maintenance system provided in an embodiment of the present invention；
Fig. 2 is the flow chart of power battery pack equalization maintenance method provided in an embodiment of the present invention.
Embodiment
It is below in conjunction with attached drawing and specifically real for the purpose of the present invention, technical solution and advantage is more clearly understood
Applying example, the invention will be further described.It should be appreciated that specific embodiment described herein is only used for explaining the present invention, not
For limiting the present invention.
With reference to Fig. 1, the functional block diagram of power battery pack equalization maintenance system provided in an embodiment of the present invention, for the ease of saying
It is bright, illustrate only with the relevant part of the embodiment of the present invention, details are as follows：
Power battery pack equalization maintenance system is connected with the battery pack 5 being composed in series by N number of single battery 51, power battery
Group equalized maintenance system includes：Battery set charge/discharge equipment 2, N number of single battery charging equipment 3 and computer 4；Its Computer
4 include control unit 41 and data processing unit 42；The charge-discharge end of battery set charge/discharge equipment 2 is connected with the battery pack,
The communication terminal of battery set charge/discharge equipment 2 is connected with described control unit, and the power end of battery set charge/discharge equipment 2 is used for and friendship
Galvanic electricity source 1 connects；Battery set charge/discharge equipment 2 is used to carry out discharge and recharge to battery pack 5 and gathers the magnitude of voltage at 5 both ends of battery pack
And current value；The charge-discharge end of each single battery charging equipment 3 is connected in one in parallel in N number of single battery charging equipment 3
The both ends of a single battery 51, the communication terminal of each single battery charging equipment 3 are connected with control unit 41, each monomer
The power end of battery charging equipment 3 is used to be connected with AC power 1；Each single battery charging equipment 3 is used for a list
Body battery 51 is charged and gathers the magnitude of voltage and current value at 51 both ends of single battery；N be more than or equal to 2 and less than etc.
In 500 positive integer；During work, control unit 41 is electric by the magnitude of voltage at 5 both ends of battery pack and current value and each monomer
The magnitude of voltage and current value at 51 both ends of pond feed back to data processing unit 42；Data processing unit 42 by the magnitude of voltage received and
Current value sends instruction compared with default threshold value and according to comparative result；Control unit 41 is according to instruction output control electricity
Pond group charging/discharging apparatus 2 is to the charging electricity of the charging current and single battery charging equipment 3 of battery pack 5 to single battery 51
Stream so that 51 equalizaing charge of each single battery.
Wherein, default threshold value includes：The maximum rated voltage of single battery, maximum rated current, minimum discharge voltage,
The lower threshold of the charging current of maximum differential pressure and the battery set charge/discharge equipment.
In embodiments of the present invention, battery set charge/discharge equipment 2 is the independent equipment for carrying out discharge and recharge, is passed through
Discharge and recharge master port integrally carries out battery pack discharge and recharge, and power supply connects alternating current 220V/380V, while battery set charge/discharge equipment 2
Equipped with PORT COM, the communication bus being made up of CAN bus/RS232/RS485 realizes the communication with computer.N number of monomer
The both ends for being connected to each single battery 51 of battery charging equipment 3 independently, by charge balancing port to single battery
Charge, power supply 1 meets alternating current 220V/380V and PORT COM is equipped with as battery set charge/discharge equipment 2, by CAN bus/
The communication bus that RS232/RS485 is formed realizes the communication with computer.Communication bus will be gathered from single battery charging equipment 3
To information be transferred to control unit 41, led between control unit 41 and computer by CAN bus/RS485/RS232
News.
In embodiments of the present invention, battery set charge/discharge equipment 2 is responsible for the battery pack 5 to series connection while charges or put
Electricity, and adopt the information of voltage and current information at 5 both ends of set battery Group；Single battery charging equipment 3 is responsible in the battery to series connection
The energy management that charges and discharges of each single battery 51, and gather the information of voltage and electric current at 51 both ends of single battery
Information, with four electrode forms, (V+V-I+I-, V+V- two is used for sampled voltage information, I+I- to each single battery charging equipment 3
Two are used to flow) export the both ends for being connected to battery.Battery set charge/discharge equipment 2 obtains each monomer electricity by CAN bus
The voltage in pond 51, or the voltage by each single battery 51 of 3 communication bus of single battery charging equipment acquisition, calculate and obtain
The mode of discharge and recharge and required Current Voltage numerical value, each monomer balancer is also by communication bus or the electricity of itself
Current voltage detects data, confirms the balanced way and balance policy to each single battery.Control unit 41 is mainly responsible for reception
The instruction that computer is sent, while be then the place to receive information by the module information read feedback and computer, computer
Manage and what is instructed sends.
Below in conjunction with the functional block diagram of Fig. 1 power battery pack equalization maintenance systems provided in an embodiment of the present invention, with reference to Fig. 2
The flow chart of power battery pack equalization maintenance method provided in an embodiment of the present invention, to power battery provided in an embodiment of the present invention
Group equalized maintenance method is described further.
A kind of power battery pack equalization maintenance method based on above-described power battery pack equalization maintenance system, is used for
Equalized maintenance is carried out to the battery pack 5 being made of multiple single batteries 51, power battery pack equalization maintenance method includes following step
Suddenly：
S1：Charge step：
S11：The battery set charge/discharge equipment carries out the battery pack with the maximum rated current of the single battery
Constant-current charge；
S12：While with the step S11, the single battery charging equipment is with its maximum output current to the list
Body battery carries out constant-current charge；
S2：Judge whether to have in the battery pack magnitude of voltage of a single battery to exceed first voltage threshold value；If so, then
S3 is entered step, if it is not, being then back to step S11；
S3：The charging current of the battery set charge/discharge equipment is adjusted to m/mono- of the maximum rated current, institute
It is the positive integer more than or equal to 2 to state m；
S4：Whether the charging current of the battery set charge/discharge equipment after being adjusted in judgment step S3 is the first electricity
Threshold value is flowed, if so, then the battery set charge/discharge equipment is stopped, if it is not, being then back to step S2；
S5：Judge whether the voltage capacity value of each single battery reaches first voltage threshold value, if so, the then monomer electricity
Pond charging equipment is stopped, if it is not, being then back to step S12；
S6：The single battery charging equipment charges the single battery with constant voltage mode；
S7：Judge whether single battery electric current is reduced to the second current threshold, if so, then single battery charging equipment stops
Work；If it is not, then it is back to step S6.
Wherein, first voltage threshold value is the maximum rated voltage of single battery；First voltage threshold value is according to the class of battery pack
Type and customer requirement setting.First current threshold is the lower threshold of the charging current of battery set charge/discharge equipment；First electric current
Threshold value is zero to any value between the maximum output current of single battery charging equipment.Second current threshold can be according to electricity
Type and the customer requirement setting of pond group, can be zero any value set to client, such as：500mA.
In embodiments of the present invention, power battery pack equalization maintenance system is mainly used for the periodic maintenance (tool to battery pack
The body time is depending on battery variety), when charging using the system to battery pack, it is broadly divided into 2 patterns；3 stages,
Details are as follows now：
(1) pattern 1, first stage big charger (referred to as big charger when battery set charge/discharge equipment plays charging effect)
Charging is carried out at the same time to battery with single battery charging equipment 3, single battery charging equipment 3 is with maximum 5~20A (concrete numerical values
Can be depending on the requirement of battery variety and client) electric current charge；Big charger with battery maximum rated current into
Row charging, if the magnitude of voltage for collecting a certain single battery reaches predetermined maximum voltage value during charging, fills greatly
The charging current of electric appliance be reduced to automatically before 1/2 times (progressively decline to staged mise-a-la-masse method), or progressively more segment by
Step reduces electric current, until monomer battery voltage is less than maximum charging voltage value, and single battery charging equipment 3 continues with maximum
The electric current of 10A continue constant current constant voltage mode CCCV charging, and so on cycle criterion, until big charger electric current
Value is minimized current value, then big charger, which is automatically closed, is stopped.And single battery charging equipment 3, then in all stage
It is independently the equalizaing charge pattern that each single battery carries out CC-CV, until each single battery reaches required charging and stops
Only current values.After the closing of big charger, single battery charging equipment 3 does not reach second stage for voltage and energy value
Single battery to predetermined value continues to carry out constant current constant voltage CC-CV chargings with maximum 5-20A electric currents, until each single battery electricity
Pressure-volume value reaches predetermined value.The single battery for having reached predetermined maximum voltage value at the same time then enters phase III charging.The
Three stages were when monomer battery voltage value reaches maximum, and single battery charging equipment 3 is automatic from constant current CC chargings before
Transition is constant pressure CV chargings, until each cell voltage value of battery pack reaches with current value the same numerical value, that is, is realized electric
Pressure is balanced and reaches predetermined minimum current value, then single battery charging equipment 3 is automatically closed, in whole charging process,
It is to be completely independent between single battery charging equipment 3, is independent of each other.
(2) pattern 2, first stage：Big charger is in charging process, as long as a certain monomer battery voltage reaches maximum
Value, big charger is then stopped, in follow-up whole process single battery charging equipment 3 be all with the electric current of 5~20A of maximum into
Row constant current constant voltage pattern CC-CV charges, until each single battery reaches charge cutoff condition.Second stage is closed in big charger
After closing, the single battery that single battery charging equipment 3 is not reaching to predetermined value for voltage and energy value continues with maximum 5-
20A electric currents carry out constant current constant voltage CC-CV chargings, until each monomer battery voltage capability value reaches predetermined value.Reach at the same time
Single battery to predetermined maximum voltage value then enters phase III charging.Phase III is reached most in monomer battery voltage value
During big value, single battery charging equipment 3 from constant current CC charging automatic Transitions before be constant pressure CV chargings, it is every until battery pack
A cell voltage value all reach with current value as numerical value, that is, realize and electric voltage equalization and reach predetermined minimum current value, then it is single
Body battery charging equipment 3 is automatically closed, and is to be completely independent between single battery charging equipment 3 in whole charging process,
It is independent of each other.The present invention combines battery pack charge maintenance process of giving using big charger and single battery charging equipment 3, and
And big charger is that charging current is then adjusted to when having any one monomer battery voltage to reach predetermined maximum in battery pack
1/2 times (mode 1) originally, or the premise of reduction electric current progressively make do not have the magnitude of voltage of single battery in whole battery pack
It is predetermined maximum voltage value, is less than certain numerical value in big charger electric current, big charger is stopped.And small maintenance device then after
It is continuous to safeguard work altogether, until maintenance requirement reaches, it is automatically stopped.Big charger is after start-up operation, the condition that is stopped
There are two, when successively decrease in electric current in a manner of 1/2, or until reaching complete charge in a manner of charging current is progressively successively decreased
The condition of stopping, or big charger detect that any one monomer battery voltage reaches maximum, and big charger just stops work
Make, and it is always to carry out maintenance in a manner of constant current constant voltage CC-CV to fill in whole process that single battery charging equipment 3, which is then,
Electricity, single battery charging equipment 3 are both the process being charged to battery and to cell voltage progress equalized maintenance.Monomer
Battery charging equipment 3 is to obtain accurate monomer voltage by the connection mode of 4 electrode I+I-V+V- to detect and control.
Compared with prior art, power battery pack equalization maintenance system and method provided by the invention, can be rapidly completed
To the equalized maintenance of battery pack, while the effect after maintenance is more stablized.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (5)
- A kind of 1. power battery pack equalization maintenance method based on power battery pack equalization maintenance system, it is characterised in that described Power battery pack equalization maintenance system is connected with the battery pack being composed in series by N number of single battery, including：Data processing unit；The control unit being connected with the data processing unit；Battery set charge/discharge equipment, its charge-discharge end are connected with the battery pack, and communication terminal is connected with described control unit, power supply End is used to be connected with AC power；The battery set charge/discharge equipment is used to carry out discharge and recharge to battery pack and gathers the battery The magnitude of voltage and current value at group both ends；AndN number of single battery charging equipment, the charge-discharge end of each single battery charging equipment are connected in a monomer electricity in parallel The both ends in pond, the communication terminal of each single battery charging equipment are connected with described control unit, and power end is used for and alternating current Source connects；Each single battery charging equipment is used to charging to a single battery and gathering a single battery both ends Magnitude of voltage and current value；The N is the positive integer more than or equal to 2 and less than or equal to 500；During work, control unit is by the magnitude of voltage at the battery pack both ends and current value and the electricity at each single battery both ends Pressure value and current value feed back to the data processing unit；The data processing unit by the magnitude of voltage received and current value with Default threshold value is compared and sends instruction according to comparative result；Described control unit is according to described instruction output control Battery set charge/discharge equipment fills single battery the charging current of the battery pack and the single battery charging equipment Electric current so that each single battery equalizaing charge；It the described method comprises the following steps：S1：Charge step：S11：The battery set charge/discharge equipment carries out constant current with the maximum rated current of the single battery to the battery pack Charging；S12：While with the step S11, the single battery charging equipment is with its maximum output current to monomer electricity Pond carries out constant-current charge；S2：Judge whether to have in the battery pack magnitude of voltage of a single battery to exceed first voltage threshold value；If so, then enter Step S3, if it is not, being then back to step S11；S3：The charging current of the battery set charge/discharge equipment is adjusted to m/mono- of the maximum rated current, the m For the positive integer more than or equal to 2；S4：Whether the charging current of the battery set charge/discharge equipment after being adjusted in judgment step S3 is the first current threshold Value, if so, then the battery set charge/discharge equipment is stopped, if it is not, being then back to step S2；S5：Judge whether the voltage capacity value of each single battery reaches first voltage threshold value, if so, S6 is then entered step, if It is no, then it is back to step S12；S6：The single battery charging equipment charges the single battery with constant voltage mode；S7：Judge whether single battery electric current is reduced to the second current threshold, if so, then single battery charging equipment stops work Make；If it is not, then it is back to step S6.
- 2. power battery pack equalization maintenance method as claimed in claim 1, it is characterised in that in step s 12, the monomer The maximum output current of battery charging equipment is set according to the type and customer requirement of battery pack.
- 3. power battery pack equalization maintenance method as claimed in claim 1, it is characterised in that the first voltage threshold value is single The maximum rated voltage of body battery；The first voltage threshold value is set according to the type and customer requirement of battery pack.
- 4. power battery pack equalization maintenance method as claimed in claim 1, it is characterised in that first current threshold is institute State the lower threshold of the charging current of battery set charge/discharge equipment；First current threshold be zero to the single battery charge Any value between the maximum output current of equipment.
- 5. power battery pack equalization maintenance method as claimed in claim 1, it is characterised in that second current threshold according to Type and the customer requirement setting of battery pack.
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| CN104362695B (en) * | 2014-11-10 | 2016-08-24 | 中南民族大学 | A kind of series-connected batteries equalizing system and control method thereof |
| CN105703023A (en) * | 2014-11-28 | 2016-06-22 | 奇点新源国际技术开发(北京)有限公司 | Charging-discharging method and apparatus for standby battery of vehicle-mounted terminal |
| CN206864565U (en) * | 2017-06-16 | 2018-01-09 | 倍登新能源科技（苏州）有限公司 | A kind of battery modules mend electric installation |
| CN107769328A (en) * | 2017-11-21 | 2018-03-06 | 深圳市森树强电子科技有限公司 | A kind of more nodal pattern lithium cell charging management methods and device |
| CN109507603B (en) * | 2018-12-11 | 2021-08-20 | 潍柴动力股份有限公司 | Power battery external characteristic testing method and system |
| CN111762061A (en) * | 2019-04-02 | 2020-10-13 | 哈尔滨智木科技有限公司 | Power battery pack balance maintenance method and balance maintenance instrument |
| CN112737032B (en) * | 2020-12-29 | 2023-09-29 | 科华恒盛股份有限公司 | Battery charging control method, control device and terminal |
| CN112968226A (en) * | 2021-02-04 | 2021-06-15 | 河南克能新能源科技有限公司 | Capacity restoration method for laggard single-cell battery pack |
| CN113954692B (en) * | 2021-09-07 | 2023-08-22 | 东风汽车集团股份有限公司 | Battery charging control method, device and equipment |
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| CN104167770A (en) * | 2013-07-19 | 2014-11-26 | 郑州宇通客车股份有限公司 | Battery group discharging control method and battery group charging control method |
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| CN103715722A (en) | 2014-04-09 |
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