CN109755681A - Battery core equalization processing method, system and power battery pack - Google Patents
Battery core equalization processing method, system and power battery pack Download PDFInfo
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- CN109755681A CN109755681A CN201811639736.8A CN201811639736A CN109755681A CN 109755681 A CN109755681 A CN 109755681A CN 201811639736 A CN201811639736 A CN 201811639736A CN 109755681 A CN109755681 A CN 109755681A
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- battery core
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- equalization
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- 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 present invention provides battery core equalization processing method, system and power battery packs.Battery core equalization processing method of the invention, including equalization starting step；Voltage transfer ratio is sent to the next battery core being connected with first battery core to step, using the voltage value of first battery core as line voltage value, and the difference and preset voltage threshold of the voltage value of next battery core and line voltage value are compared；Equalization step, if the difference of two voltage values is less than preset voltage threshold, the voltage value of next battery core is constant, while passing to the battery core positioned at next battery core downstream for the smallest voltage value in two voltage values as line voltage value；Otherwise, it is the smallest voltage value in two voltage values by the electric voltage equalization of next battery core, while passes to the battery core positioned at next battery core downstream for the smallest voltage value in two voltage values as line voltage value.The present invention can reduce the response time with faster procedure execution efficiency.
Description
Technical field
The present invention relates to power battery voltage process technology field more particularly to a kind of battery core equalization processing methods；Together
When, the battery core equalization processing system based on this method that the invention further relates to a kind of, and it is loaded with the power of the processing system
Battery pack.
Background technique
Existing power battery management system namely BMS system use the distributed system of centralization, by one piece of mainboard
It is constituted with several pieces from plate；It is to acquire the status information (such as voltage, temperature information) of battery core from the main task of plate, mainboard is held
Carry on a shoulder pole all calculating and store tasks.It is current to be mostly used mainboard to control balanced beginning and equilibrium in battery core equalization function
Then strategy, the means are sentenced due to needing primary control program to calculate maximum monomer voltage and minimum monomer voltage according to maximum differential pressure
The fixed battery core that whether starts is balanced, after starting equilibrium, judges which battery core needs equilibrium by primary control program, by the battery core equalizer switch
Signal sets 1, does not need balanced battery core equalizer switch signal and sets 0, so that the calculating of mainboard and storage pressure are bigger than normal, leads to program
Operational efficiency reduces, and the response time is elongated, influences battery management efficiency.
Summary of the invention
In view of this, the present invention is directed to propose a kind of battery core equalization processing method is reduced with improving battery optimization efficiency
Response time.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of battery core equalization processing method handles the electric voltage equalizationization of multiple connected battery cores, and this method includes such as
Lower step:
Equalize starting step；
Voltage transfer ratio to step, using the voltage value of the first battery core as line voltage value be sent to it is described first
The connected next battery core of battery core, and by the difference of the voltage value of next battery core and line voltage value and preset
Voltage threshold is compared；
Equalization step, if the difference of two voltage values is less than preset voltage threshold, the voltage of next battery core
It is worth constant, while passes to the smallest voltage value in two voltage values as line voltage value positioned at next battery core
The battery core in downstream；If the difference of two voltage values is greater than preset voltage threshold, by the voltage of next battery core
Equilibrium is the smallest voltage value in two voltage values, while being passed the smallest voltage value in two voltage values as line voltage value
Pass the battery core positioned at next battery core downstream；
Step is completed in equilibrium, repeats equalization step, until the voltage value and the received line electricity of the battery core of each battery core
The difference of pressure value is respectively less than preset voltage threshold.
Further, the voltage threshold is 0.01~0.03V.
Further, the voltage threshold is 0.02V.
Compared with the existing technology, present invention has the advantage that
Battery core equalization scheme does not need the control of mainboard, and most of calculating tasks are distributed on each battery core controller,
Equalization processing in battery management is completed by each battery core controller coordinated, can be reduced with faster procedure execution efficiency
Response time enables the more efficient real-time processing information of BMS system and issues control command.
Invention also provides a kind of battery core equalization processing systems, for the electric voltage equalization to multiple connected battery cores
Change processing, the processing system include:
Control unit is configured to correspond to the multiple of each battery core setting；
Comparator is configured to correspond to the multiple of each described control unit setting, and each comparator is by corresponding institute
Under the control for stating control unit, the difference of voltage value and the received line voltage value of battery core to the corresponding battery core
It is compared with preset voltage threshold, so that described control unit controls the electric voltage equalization of the corresponding battery core.
In addition, being connected and composed invention also provides a kind of power battery pack by multiple battery cores, the power battery pack
It is loaded with battery core equalization processing system as above.
Battery core equalization processing system of the invention and power battery pack, it is having the same with battery core equalization processing method
Effect, details are not described herein.
Detailed description of the invention
The attached drawing for constituting a part of the invention is to be used to provide further understanding of the present invention, signal of the invention
Property embodiment and its explanation be to be used to explain the present invention, the front and back that is directed to, upper inferior noun of locality language are only used for indicating phase
Pair positional relationship, do not constitute an undue limitation on the present invention.In the accompanying drawings:
Fig. 1 is that one battery core equalization processing system of the embodiment of the present invention connects block diagram；
Fig. 2 is the schematic diagram of the state of two battery core equalization processing method of the embodiment of the present invention once；
Fig. 3 is the schematic diagram under the state two of two battery core equalization processing method of the embodiment of the present invention；
Fig. 4 is the schematic diagram under the state three of two battery core equalization processing method of the embodiment of the present invention；
Fig. 5 is the schematic diagram under the state four of two battery core equalization processing method of the embodiment of the present invention；
Fig. 6 is the schematic diagram under the state five of two battery core equalization processing method of the embodiment of the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination；Described embodiment is also only part, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Embodiment one
As shown in Figure 1, the present embodiment is related to a kind of battery core equalization processing system, for the electricity to multiple connected battery cores
Equalization processing is pressed, which includes control unit, comparator.Wherein control unit is configured to correspond to each electricity
Core is arranged multiple；Comparator is configured to correspond to the multiple of each described control unit setting, and each comparator is corresponded to
Described control unit control under, to the voltage value of the corresponding battery core and the received line voltage value of battery core
Difference and preset voltage threshold be compared so that described control unit controls the electric voltage equalization of the corresponding battery core.
Embodiment two
The present embodiment is based on the basis of embodiment one, is related to a kind of battery core equalization processing method, this method is to multiple
The electric voltage equalizationization of connected battery core is handled, and this method comprises the following steps:
Equalize starting step；
Voltage transfer ratio to step, using the voltage value of the first battery core as line voltage value be sent to it is described first
The connected next battery core of battery core, and by the difference of the voltage value of next battery core and line voltage value and preset
Voltage threshold is compared；
Equalization step, if the difference of two voltage values is less than preset voltage threshold, the voltage of next battery core
It is worth constant, while passes to the smallest voltage value in two voltage values as line voltage value positioned at next battery core
The battery core in downstream；If the difference of two voltage values is greater than preset voltage threshold, by the voltage of next battery core
Equilibrium is the smallest voltage value in two voltage values, while being passed the smallest voltage value in two voltage values as line voltage value
Pass the battery core positioned at next battery core downstream；
Step is completed in equilibrium, repeats equalization step, until the voltage value and the received line electricity of the battery core of each battery core
The difference of pressure value is respectively less than preset voltage threshold.
Specifically, by taking eight battery cores being connected with each other shown in Fig. 2 as an example, method of the invention is described in detail such as
Under:
For ease of description, to Fig. 2 shows eight battery cores assign number 0,1,2,3,4,5,6,7 respectively, from No. 0 battery core
Start, the initial voltage of each battery core is sequentially 3.80V, 3.81V, 3.83V, 3.80V, 3.78V, 3.80V, 3.79V, 3.78V.
Predetermined voltage threshold is 0.02V.Specific equalization methods are as follows:
When balanced entry condition starts, starting is balanced.At this point, balanced by numbering the battery core for being 0 starting, battery core 0 is to electricity
Core 1 sends the monomer voltage V0 of battery core 0, that is, the monomer voltage of 3.80V is sent, at this point, the voltage is line voltage value Vi.
The size of control unit alternative route the voltage value Vi and V1 of battery core 1, if | V1-Vi | < 0.02V, battery core 1 are not required to
Equilibrium is opened, min (Vi, V1) is passed into battery core 2, result is as shown in Figure 3.As shown in Figure 3, due to | V1-Vi |=|
3.80-3.81 |=0.01V < 0.02V, therefore, battery core 1 keep original voltage 3.81V, while by voltage the smallest in Vi and V1
Value 3.80V passes to battery core 2 as line voltage value Vi.
Similarly, the control unit of battery core 2 compares the size of Vi and V2, if | V2-Vi | < 0.02V, battery core 2 do not need
Weighing apparatus, if | V2-Vi | >=0.02V, battery core 2 need to open balanced.Based on Fig. 3, | V2-Vi |=| 3.83-3.80 |=0.03V >
0.02V, at this time, it may be necessary to equilibrium is carried out to battery core 2, it is as the voltage value of battery core 2, i.e., electric by voltage value the smallest in V2 and Vi
The voltage of core 2 is down to 3.80V, meanwhile, min (Vi, V2) is passed into battery core 3, result is as shown in Figure 4.
Step as above is repeated, until minimum voltage is passed to battery core 0 by battery core 7, is so far completed the minimum of 8 battery cores
Voltage passes to battery core 0, and completes the equilibrium of part battery core, and result is as shown in Figure 5.
It is balanced to carry out the second wheel, continues minimum monomer voltage to front transfer, until the voltage value and the electricity of all battery cores
The difference of the received line voltage value of core is respectively less than preset voltage threshold, completes equilibrium, and final result is as shown in Figure 6.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than limitation ot it；It is all in spirit of the invention
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of battery core equalization processing method is handled the electric voltage equalizationization of multiple connected battery cores, it is characterised in that the party
Method includes the following steps:
Equalize starting step；
Voltage transfer ratio is sent to and the first battery core step using the voltage value of the first battery core as line voltage value
Connected next battery core, and by the difference and preset voltage of the voltage value of next battery core and line voltage value
Threshold value is compared；
Equalization step, if the difference of two voltage values is less than preset voltage threshold, the voltage value of next battery core is not
Become, while passing to the smallest voltage value in two voltage values as line voltage value positioned at next battery core downstream
The battery core；If the difference of two voltage values is greater than preset voltage threshold, by the electric voltage equalization of next battery core
For the smallest voltage value in two voltage values, while being passed to using the smallest voltage value in two voltage values as line voltage value
The battery core positioned at next battery core downstream；
Step is completed in equilibrium, repeats equalization step, until the voltage value and the received line voltage value of the battery core of each battery core
Difference be respectively less than preset voltage threshold.
2. battery core equalization processing method according to claim 1, it is characterised in that: the voltage threshold be 0.01~
0.03V。
3. battery core equalization processing method according to claim 2, it is characterised in that: the voltage threshold is 0.02V.
4. a kind of battery core equalization processing system, for the electric voltage equalizationization processing to multiple connected battery cores, it is characterised in that
The processing system includes:
Control unit is configured to correspond to the multiple of each battery core setting；
Comparator is configured to correspond to the multiple of each described control unit setting, and each comparator is by the corresponding control
Under the control of unit processed, the difference of voltage value and the received line voltage value of battery core to the corresponding battery core and pre-
If voltage threshold be compared so that described control unit controls the electric voltage equalization of the corresponding battery core.
5. a kind of power battery pack is connected and composed by multiple battery cores, it is characterised in that: the power battery pack load is just like right
It is required that battery core equalization processing system described in 4.
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Address after: No.8899 Xincheng Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: SVOLT Energy Technology Co.,Ltd. Address before: 213200 168 Huacheng Road, Jintan District, Changzhou, Jiangsu Patentee before: SVOLT Energy Technology Co.,Ltd. |