CN106026226B - Battery equalization method, device and battery system - Google Patents
Battery equalization method, device and battery system Download PDFInfo
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- CN106026226B CN106026226B CN201610340965.4A CN201610340965A CN106026226B CN 106026226 B CN106026226 B CN 106026226B CN 201610340965 A CN201610340965 A CN 201610340965A CN 106026226 B CN106026226 B CN 106026226B
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- battery
- preset value
- resistance
- switching device
- battery pack
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application proposes a kind of battery equalization method, apparatus and system, wherein this method comprises: obtaining the voltage value at i-th of battery both ends in battery pack, wherein i is greater than 1 and to be less than or equal to the integer of N, N is in battery pack include battery quantity；According to the relationship of the voltage value and first preset value and the second preset value, the time of i-th resistance access circuit in parallel with i-th of battery is determined.Hereby it is achieved that according to the voltage at each battery both ends, the euqalizing current of regulating cell, to keep aging speed, discharge and recharge and the temperature of each battery in battery pack etc. balanced, and time for balance reaches unanimity, and avoided balanced generation, and extended the service life of battery pack.
Description
Technical field
This application involves electronic technology field more particularly to a kind of battery equalization methods, device and battery system.
Background technique
Currently, the power battery that industrial circle uses, is made of multiple performances and the identical single battery of parameter mostly
Battery pack.For including the battery pack of multiple batteries, since the parameter of battery can not accomplish completely the same, can go out
Now every cell degradation speed, temperature, charge/discharge capacity different problems, this will lead in battery pack certain battery units with
Other battery cell capacities mismatch, and then lead to the capacity mismatch of entire battery pack.
When charging, other series-connected cell units are full of not yet, and the fast battery unit of aging fills with.When electric discharge,
He discharges battery unit not yet, and the fast battery of aging has discharged, and forms wooden pail effect, restricts the performance hair of entire battery pack
It waves.
If battery system is allowed to be run in this case without being managed, the service life of battery and the capacity of system are equal
It will receive influence.
Summary of the invention
The application is intended to solve at least some of the technical problems in related technologies.
For this purpose, first purpose of the application is to propose a kind of battery equalization method, the method achieve according to each
The voltage at battery both ends, the euqalizing current of regulating cell, to make the aging speed of each battery in battery pack, discharge and recharge
It is balanced with temperature etc., and time for balance reaches unanimity, and avoided balanced generation, and extended the service life of battery pack.
Second purpose of the application is to propose a kind of battery balanced device.
The third purpose of the application is to propose a kind of battery system.
In order to achieve the above object, the application first aspect embodiment proposes a kind of battery equalization method, comprising: obtain battery
The voltage value at i-th of battery both ends in group, wherein i is the integer greater than 1 and less than or equal to N, and N is in battery pack including battery
Quantity；According to the relationship of the voltage value and first preset value and the second preset value, determining and i-th of battery is simultaneously
The time of i-th of resistance access circuit of connection.
The battery equalization method of the embodiment of the present application, it is pre- with first according to the voltage value at battery each in battery pack both ends
If the preset value of value and second relationship, the determining time with the associated resistance access circuit of each battery.Hereby it is achieved that
According to the voltage at each battery both ends, the euqalizing current of regulating cell, thus make the aging speed of each battery in battery pack,
Discharge and recharge and temperature etc. are balanced, and time for balance reaches unanimity, and avoid balanced generation, and extend the use of battery pack
Service life.
In order to achieve the above object, the application second aspect embodiment proposes a kind of battery balanced device, comprising: obtain mould
Block, for obtaining the voltage value at i-th of battery both ends in battery pack, wherein i is the integer greater than 1 and less than or equal to N, and N is
It include the quantity of battery in battery pack；Determining module, for preset according to the voltage value and the first preset value and second
The relationship of value determines the time of i-th resistance access circuit in parallel with i-th of battery.
The battery balanced device of the embodiment of the present application, it is pre- with first according to the voltage value at battery each in battery pack both ends
If the preset value of value and second relationship, the determining time with the associated resistance access circuit of each battery.Hereby it is achieved that
According to the voltage at each battery both ends, the euqalizing current of regulating cell, thus make the aging speed of each battery in battery pack,
Discharge and recharge and temperature etc. are balanced, and time for balance reaches unanimity, and avoid balanced generation, and extend the use of battery pack
Service life.
In order to achieve the above object, the application third aspect embodiment proposes a kind of battery system, comprising: battery pack, resistance
Component, switching device component and battery balanced device as described above；
Wherein, after i-th of resistance is connected with i-th of switching device in the switch block in the resistor assembly, with institute
I-th of battery series connection in battery pack is stated, i is the integer greater than 1 and less than or equal to N, and N is the number in battery pack including battery
Amount.
The battery system of the embodiment of the present application, it is preset with first according to the voltage value at battery each in battery pack both ends
The relationship of value and the second preset value, the determining time with the associated resistance access circuit of each battery.Hereby it is achieved that according to
The voltage at each battery both ends, the euqalizing current of regulating cell, to make the aging speed of each battery in battery pack, charge and discharge
Electricity and temperature etc. are balanced, and time for balance reaches unanimity, and avoid balanced generation, and extend battery pack uses the longevity
Life.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the flow diagram of the battery equalization method of the application one embodiment；
Fig. 2 is the battery system structure schematic diagram of the application one embodiment；
Fig. 3 is the flow diagram of the battery equalization method of the application another embodiment；
Fig. 4 is the battery balanced device structural schematic diagram of the application one embodiment.
Specific embodiment
Embodiments herein is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the application, and should not be understood as the limitation to the application.
Below with reference to the accompanying drawings the battery equalization method, device and battery system of the embodiment of the present application are described.
Fig. 1 is the battery equalization method flow diagram of the application one embodiment.
As shown in Figure 1, the battery equalization method includes:
Step 101, the voltage value at i-th of battery both ends in battery pack is obtained, wherein i is greater than 1 and less than or equal to N's
Integer, N are the quantity in battery pack including battery.
Specifically, the executing subject of battery equalization method provided in this embodiment, is battery provided by the embodiments of the present application
Balancer, which can be configured in any battery system with multiple battery compositions, for controlling battery system
Battery pack in each battery equilibrium.
Wherein, battery balanced device can use various ways, obtain the voltage value at i-th of battery both ends.For example, can be with
It is monitored using voltage of the voltage sensor to battery both ends, alternatively, the electric current of each battery can also be flowed by monitoring,
To determine the voltage value etc. at each battery both ends.
Step 102, determining and described the according to the relationship of the voltage value and first preset value and the second preset value
The time of i-th of resistance access circuit of i battery parallel connection.
Specifically, in the present embodiment, it, can be by according to each battery in controlling battery pack when the equilibrium of each battery
The voltage value at both ends controls the resistance value in parallel with the battery, to control the euqalizing current of each battery, and then makes battery pack
In each battery keep in balance.
Wherein, the first preset value and the second preset value can be determined according to the specification and nominal operational parameters of battery,
For example, being determined according to permissible range of voltage difference etc. between battery each in the voltage rating of battery, minimum voltage and battery pack
First preset value and the second preset value.
It should be noted that can use the time in switching device control resistance access circuit, for example, utilizing derailing switch
Part connection in series with a resistor, to control the time of resistance access circuit.
That is above-mentioned steps 102, comprising: according to the voltage value and first it is preset value and the second preset value relationship,
The determining turn-on time with concatenated i-th of the switching device of i-th of the resistance.
Specifically, battery provided by the embodiments of the present application is described below clearly to be illustrated to the above method
System.
Fig. 2 is the battery system structure schematic diagram of the application one embodiment.
As shown in Fig. 2, the battery system includes: battery pack 21, resistor assembly 22, switch block 23 and battery balanced device
24。
Wherein, i-th of resistance 22i and i-th of switching device 23i in the switch block 23 goes here and there in the resistor assembly 22
In parallel with i-th of battery 21i in the battery pack 21 after connection, i is the integer greater than 1 and less than or equal to N, and N is battery pack
In include battery quantity.
In actual use, above-mentioned resistor assembly 22 is made of the resistance of N number of mutual insulating, the resistance value and function of this N number of resistance
Rate grade can be determined according to the power grade of battery pack, and N number of resistance in normal work heating up, be needed in its temperature
It spends in controlled range.In addition, N number of switching device in switch block 23 is controllable switch device, for example can be imitated for power field
(MOSFET), insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, abbreviation IGBT) etc. should be managed
Deng.Wherein, the parameter of each switching device, it is also desirable to be determined according to the power grade of battery and usage scenario.For example battery is put
Electricity or the maximum current of charging are 10A, if considering 20% surplus, the rated current of the switching device selected needs for 12A.
Specifically, as shown in Fig. 2, each battery 21i and a resistance 22i in battery system, in battery pack 21
It is in parallel with a switching device 23i.When switching device 23i conducting, battery 21i is discharged by resistance 22i；Work as derailing switch
When part 23i is disconnected, resistance 22i and battery 21i are disconnected.As a result, the voltage on battery 21i, can carry out spirit by resistance 22i
Adjusting living, so that the charging current and discharge current to battery 21i are effectively adjusted.
In the present embodiment, by judging the relationship of the voltage value at any one battery both ends and preset value in battery pack,
The turn-on time for determining switching device, controls the charge and discharge time of each battery, so that each battery in battery pack be made to realize
It is balanced.
The battery equalization method of the embodiment of the present application, it is pre- with first according to the voltage value at battery each in battery pack both ends
If the preset value of value and second relationship, the determining time with the associated resistance access circuit of each battery.Hereby it is achieved that
According to the voltage at each battery both ends, the euqalizing current of regulating cell, thus make the aging speed of each battery in battery pack,
Discharge and recharge and temperature etc. are balanced, and time for balance reaches unanimity, and avoid balanced generation, and extend the use of battery pack
Service life.
Fig. 3 is the battery equalization method flow diagram of another embodiment of the application.
As shown in figure 3, the battery equalization method, comprising:
Step 301, the voltage value at i-th of battery both ends in battery pack is obtained.
Step 302, judge that the voltage value whether less than the first preset value, if so, thening follow the steps 303, otherwise, is held
Row step 304.
Step 303, determination turns off always in whole cycle with concatenated i-th of the switching device of i-th of the resistance.
Step 304, judge whether the voltage value is greater than the second preset value, if so, thening follow the steps 305, otherwise, hold
Row step 306.
Step 305, determination is constantly in whole cycle with concatenated i-th of the switching device of i-th of the resistance.
When step 306, according to default rule, determination and the conducting of concatenated i-th of the switching device of i-th of the resistance
Between.
Specifically, above-mentioned steps 306, comprising:
According toDetermine the turn-on time of i-th of switching device；
Wherein, siThe duty ratio switched for i-th, uiFor the current voltage in i-th of battery both ends, u1It is preset for first
Value, u2For the second preset value.
Specifically, according to the voltage at battery both ends, controlling the resistance branch in parallel with battery in the present embodiment and accessing circuit
Time, when battery both end voltage is higher, that is, be greater than the second preset value when, then control switch device is constantly on, thus
Continuous discharge processing is carried out to the batteries using resistance；When battery both end voltage is in the first preset value and the second preset value
Between when, according to current voltage value and first it is preset value and the second preset value size relation, adjust leading for switching device
The logical time, so that the batteries are carried out with interrupted and controllable time electric discharge using resistance；When battery both end voltage is lower than first
When preset value, then control switch device disconnects always, to not discharge the batteries, to guarantee each in battery pack
The electric voltage equalization at a battery both ends.
The battery equalization method of the embodiment of the present application, the voltage value at each battery both ends first in acquisition battery pack, then
When judging the voltage value at battery both ends lower than the first preset value, then control switch device turns off always in whole cycle, if
The voltage value at battery both ends is higher than the second preset value, then control switch device is constantly in whole cycle, if battery two
The voltage value at end is between the first preset value and the second preset value, then preset according to the voltage value at battery both ends and first
The size of value and the second preset value, determines the turn-on time of switching device.Hereby it is achieved that making each battery two in battery pack
The electric voltage equalization at end, to keep aging speed, discharge and recharge and the temperature of each battery in battery pack etc. balanced, and when equilibrium
Between reach unanimity, avoided balanced generation, and extended the service life of battery pack.
To realize the above method, the application another further aspect provides a kind of battery balanced device.
Fig. 4 is the battery balanced device structural schematic diagram of the application one embodiment.
As shown in figure 4, the battery balanced device, comprising:
Module 41 is obtained, for obtaining the voltage value at i-th of battery both ends in battery pack, wherein i is greater than 1 and to be less than
Integer equal to N, N are the quantity in battery pack including battery；
Determining module 42 is determined for the relationship according to the voltage value and first preset value and the second preset value
The time of i-th resistance access circuit in parallel with i-th of battery.
Specifically, battery balanced device provided in this embodiment, for executing battery balanced side provided by the above embodiment
Method.
In a kind of possible way of realization, above-mentioned determining module 42 is specifically used for:
The determining turn-on time with concatenated i-th of the switching device of i-th of the resistance.
The battery balanced device of the embodiment of the present application, it is pre- with first according to the voltage value at battery each in battery pack both ends
If the preset value of value and second relationship, the determining time with the associated resistance access circuit of each battery.Hereby it is achieved that
According to the voltage at each battery both ends, the euqalizing current of regulating cell, thus make the aging speed of each battery in battery pack,
Discharge and recharge and temperature etc. are balanced, and time for balance reaches unanimity, and avoid balanced generation, and extend the use of battery pack
Service life.
Further, above-mentioned determining module 42, is specifically used for:
Judge the voltage value whether less than the first preset value；
If so, determination turns off always in whole cycle with concatenated i-th of the switching device of i-th of the resistance.
In a kind of possible way of realization, the determining module 42 is specifically used for:
Judge whether the voltage value is greater than the second preset value；
If so, determination is constantly in whole cycle with concatenated i-th of the switching device of i-th of the resistance.
In alternatively possible way of realization, above-mentioned determining module 42 is specifically used for:
Judge the voltage value whether less than the second preset value, and be greater than the first preset value；
If so, according to default rule, when determining the conducting with concatenated i-th of the switching device of i-th of the resistance
Between.
Further, determining module 42 are specifically used for:
According toDetermine the turn-on time of i-th of switching device；
Wherein, siFor the duty ratio that i-th of switch closes, uiFor the current voltage in i-th of battery both ends, u1It is default for first
Value, u2For the second preset value.
The battery balanced device of the embodiment of the present application, the voltage value at each battery both ends first in acquisition battery pack, then
When judging the voltage value at battery both ends lower than the first preset value, then control switch device turns off always in whole cycle, if
The voltage value at battery both ends is higher than the second preset value, then control switch device is constantly in whole cycle, if battery two
The voltage value at end is between the first preset value and the second preset value, then preset according to the voltage value at battery both ends and first
The size of value and the second preset value, determines the turn-on time of switching device.Hereby it is achieved that making each battery two in battery pack
The electric voltage equalization at end, to keep aging speed, discharge and recharge and the temperature of each battery in battery pack etc. balanced, and when equilibrium
Between reach unanimity, avoided balanced generation, and extended the service life of battery pack.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the application.In addition, term " first ", " second " are used for description purposes only,
It is not understood to indicate or imply relative importance or implicitly indicates the quantity of indicated technical characteristic.
It should be appreciated that each section of the application can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
Embodiments herein is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as the limit to the application
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of application
Type.
Claims (7)
1. a kind of battery equalization method, which comprises the following steps:
Obtain the voltage value at i-th of battery both ends in battery pack, wherein i is the integer greater than 1 and less than or equal to N, and N is battery
It include the quantity of battery in group；
According to the relationship of the voltage value and first preset value and the second preset value, determination is in parallel with i-th of battery
I-th of resistance access circuit time；
The time of the determination i-th resistance access circuit in parallel with i-th of battery, comprising:
The determining turn-on time with concatenated i-th of the switching device of i-th of the resistance；
The turn-on time of the determination and concatenated i-th of the switching device of i-th of the resistance, comprising:
Judge the voltage value whether less than the second preset value, and be greater than the first preset value；
If so, according toDetermine the turn-on time of i-th of switching device；
Wherein, siFor the duty ratio that i-th of switch closes, uiFor the current voltage in i-th of battery both ends, u1For the first preset value,
u2For the second preset value；
Wherein, the described first preset value and the described second preset value be respectively according to the specification of the battery in battery pack and
What nominal operational parameters determined.
2. the method as described in claim 1, which is characterized in that the determination and concatenated i-th of the switch of i-th of the resistance
The turn-on time of device, comprising:
Judge the voltage value whether less than the first preset value；
If so, determination turns off always in whole cycle with concatenated i-th of the switching device of i-th of the resistance.
3. the method as described in claim 1, which is characterized in that the determination and concatenated i-th of the switch of i-th of the resistance
The turn-on time of device, comprising:
Judge whether the voltage value is greater than the second preset value；
If so, determination is constantly in whole cycle with concatenated i-th of the switching device of i-th of the resistance.
4. a kind of battery balanced device characterized by comprising
Module is obtained, for obtaining the voltage value at i-th of battery both ends in battery pack, wherein i is greater than 1 and to be less than or equal to N
Integer, N be battery pack in include battery quantity；
Determining module, for according to the voltage value and first it is preset value and the second preset value relationship, determine with it is described
The time of i-th of resistance access circuit of i-th of battery parallel connection；
The determining module, is specifically used for:
The determining turn-on time with concatenated i-th of the switching device of i-th of the resistance；
The determining module, is specifically used for:
Judge the voltage value whether less than the second preset value, and be greater than the first preset value；
If so, according toDetermine the turn-on time of i-th of switching device；
Wherein, siFor the duty ratio that i-th of switch closes, uiFor the current voltage in i-th of battery both ends, u1For the first preset value,
u2For the second preset value；
Wherein, the described first preset value and the described second preset value be respectively according to the specification of the battery in battery pack and
What nominal operational parameters determined.
5. device as claimed in claim 4, which is characterized in that the determining module is specifically used for:
Judge the voltage value whether less than the first preset value；
If so, determination turns off always in whole cycle with concatenated i-th of the switching device of i-th of the resistance.
6. device as claimed in claim 4, which is characterized in that the determining module is specifically used for:
Judge whether the voltage value is greater than the second preset value；
If so, determination is constantly in whole cycle with concatenated i-th of the switching device of i-th of the resistance.
7. a kind of battery system characterized by comprising battery pack, resistor assembly, switching device component and such as claim 4-
6 any battery balanced devices；
Wherein, after i-th of resistance is connected with i-th of switching device in the switch block in the resistor assembly, with the electricity
I-th of battery of Chi Zuzhong is connected, and i is the integer greater than 1 and less than or equal to N, and N is the quantity in battery pack including battery.
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| JP2019022328A (en) * | 2017-07-18 | 2019-02-07 | 矢崎総業株式会社 | Battery monitoring device |
| CN110015187B (en) * | 2017-08-31 | 2023-01-06 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic device |
| CN110994054A (en) * | 2018-10-02 | 2020-04-10 | 江西格林德能源有限公司 | Method for rapidly balancing voltage of each battery cell of battery pack |
| CN109950647B (en) * | 2019-03-27 | 2020-11-20 | 联想(北京)有限公司 | Battery system and processing method |
| CN111245051B (en) * | 2020-01-19 | 2021-08-13 | 恒大恒驰新能源汽车科技(广东)有限公司 | Power battery equalizing charging method and device, control equipment and storage medium |
| CN113511108A (en) * | 2020-04-09 | 2021-10-19 | 宁德时代新能源科技股份有限公司 | Control circuit, method and system |
| CN112706655B (en) * | 2021-01-22 | 2021-09-07 | 黄淮学院 | New energy automobile energy balance control method and system based on intelligent Internet of things |
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