CN109599903A - Battery equilibrium management method - Google Patents
Battery equilibrium management method Download PDFInfo
- Publication number
- CN109599903A CN109599903A CN201710914093.2A CN201710914093A CN109599903A CN 109599903 A CN109599903 A CN 109599903A CN 201710914093 A CN201710914093 A CN 201710914093A CN 109599903 A CN109599903 A CN 109599903A
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- CN
- China
- Prior art keywords
- battery
- pressure difference
- pressure value
- discharging current
- voltage
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
Abstract
The present invention proposes a kind of battery equilibrium management method, suitable for concatenated multiple batteries, the following steps are included: it is by micro-control unit, and the per unit time detects the voltage of all batteries in multiple batteries, and detects the first battery in multiple batteries with minimum voltage；By micro-control unit and Z-line linearity curve, the permissible pressure value of the second battery in multiple batteries is obtained；Micro-control unit judges whether the pressure difference between the voltage of the second battery and the first battery with minimum voltage is greater than the permissible pressure value of the second battery；If pressure difference is greater than permissible pressure value, low discharging current is executed to the second battery；And until pressure difference is less than permissible pressure value, then stop executing low discharging current, wherein if the pressure difference of multiple batteries in multiple batteries and the first battery with minimum voltage is all larger than permissible pressure value, execute low discharging current to multiple batteries simultaneously.
Description
Technical field
The present invention is about a kind of battery equilibrium management method.
Background technique
In recent years, lithium battery in use generally can by battery serial or parallel connection at battery pack, with provide different capacity and
The demand of voltage, still, the battery of concatenated battery pack can be because of production process and the difference of temperature, so that the characteristic of battery has
It is inconsistent in turn result in the internal resistance of each battery, voltage and electricity when use for institute's difference.It is inconsistent due to battery capacity, make
Battery pack is obtained in charge and discharge, battery capacity can gradually decrease, and cause voltage between battery mutually uneven, cause particular battery mistake
Heat finally results in battery life and thus shortens.Therefore, management is balanced for concatenated battery pack to be gradually taken seriously.
However, traditional battery balancing method can only mostly make electricity transmission, and its balanced balanced current between adjacent cells
It can be reduced as battery pressure difference becomes smaller after battery equilibrium.
Furthermore it is poor that traditional battery balancing method mostly relies on merely fixed constant voltage, according to battery core processing procedure, although
All will not be identical with the battery core capacity of money with batch, if the pressure difference all relied on fixed constant pressure difference and ignore battery core itself,
It is easy to cause battery to balance back and forth always, the energy is caused to be lost without reason.
In addition, although existing multiple battery balance method has been developed, this field still need it is a kind of preferably
And effective battery balancing method, low discharging current mechanism is carried out for concatenated battery pack, how to improve concatenated battery
Balance efficiency between group, it has also become a harsh challenge.
Summary of the invention
To reach purpose above-mentioned, the present invention proposes a kind of battery equilibrium management method, is suitable for concatenated multiple batteries,
The following steps are included: it is by a micro-control unit, and the per unit time detects the voltage of all batteries in multiple battery, and
Detect one first battery in multiple battery with minimum voltage；By the micro-control unit and a Z-line linearity curve, obtain
One permissible pressure value of one second battery in multiple battery；The micro-control unit judges the voltage of second battery and has
Whether the pressure difference between first battery of minimum voltage is greater than the permissible pressure value of second battery；If the pressure difference is greater than
The permissible pressure value then executes low discharging current to second battery；And until the pressure difference be less than the permissible pressure value, then stop
Only execute low discharging current, wherein if the pressure of multiple batteries and first battery with minimum voltage in multiple battery
Difference is all larger than the permissible pressure value, then executes low discharging current to multiple battery simultaneously.
Preferably, battery equilibrium management method of the invention is again the following steps are included: if the pressure difference is less than the permissible pressure
Value does not then execute low discharging current to second battery.
Preferably, if the currently practical capacitance (SOC) of a battery less than a certain capacitance, that is, stops executing low current
Electric discharge, avoids the battery from crossing low pressure and cause the battery permanent injury.
Preferably, multiple battery battery core, when completely filling, the capacitance error allowed is smaller；Multiple battery battery core is more
When low pressure, the capacitance error allowed is bigger.
Detailed description of the invention
Fig. 1 shows the hardware configuration schematic diagram of battery equilibrium management method of the invention；
Fig. 2 shows the coordinate schematic diagram of permissible pressure value and battery voltage value；And
Fig. 3 shows the step flow chart of battery equilibrium management method of the invention.
Wherein, the reference numerals are as follows:
10 micro-control units
A battery more than 12
The first battery of 12_1
The second battery of 12_2
12_N N battery
14 loads
S30~S38 step
Specific embodiment
Illustrate embodiments of the present invention by particular specific embodiment below, makes those skilled in the art can
Other advantages and efficacy of the present invention will be readily understood from the disclosure of this specification.The present invention also can be by other differences
Specific example implemented or applied, every details in description of the invention can not be also contrary to based on different viewpoints with applying
From carried out under spirit of the invention it is various modification and change.
Based on the following the embodiment of the present invention, a kind of battery equilibrium management method is described, this method can determine whether concatenated more
Whether the pressure difference between a battery is greater than a permissible pressure value, and then reaches and decide whether to carry out low discharging current and (carry out
Battery equilibrium administrative mechanism), and then effectively extend the service life of battery.
Fig. 1 shows the hardware configuration schematic diagram of battery equilibrium management method of the invention, as shown in Figure 1, concatenated multiple
Battery pack 12 include one first battery 12_1, one second battery 12_2 ..., Ji Yi N battery 12_N, wherein a microcontroller list
Member be respectively and electrically connected to the first battery 12_1, the second battery 12_2 ... and N battery 12_N, an and load 14 connects respectively
It is connected to concatenated multiple battery packs 12.
Fig. 2 shows that the coordinate schematic diagram of permissible pressure value and battery voltage value, permissible pressure value and battery voltage value are presented
One Z-line linearity curve, Z-line linearity curve inclusion region A, region B and region C, wherein when any battery core voltage falls in a-quadrant, table
Show that battery core voltage is low, permitted pressure difference height is in constant kenel, and when falling in region B, permitted pressure difference size is linear
Kenel when falling in region C, indicates that battery core voltage is high, and low permitted pressure difference is in constant kenel, and the present invention is by Z-line song
Line can get a permissible pressure value (the permissible pressure value is a variate-value).
Specifically, as shown in figure 3, battery equilibrium management method proposed by the invention may include following steps S30~
S38:
Step S30: by a micro-control unit, the per unit time detects the voltage of all batteries in multiple battery,
And detect one first battery in multiple battery with minimum voltage；
Step S32: by the micro-control unit and a Z-line linearity curve, one second battery in multiple battery is obtained
One permissible pressure value；
Step S34: the micro-control unit judge the voltage of second battery and first battery with minimum voltage it
Between a pressure difference whether be greater than the permissible pressure value of second battery；
Step S36: if the pressure difference is greater than the permissible pressure value, low discharging current is executed to second battery；And
Step S38: until the pressure difference be less than the permissible pressure value, then stop execute low discharging current, wherein if multiple
The pressure difference of multiple batteries and first battery with minimum voltage in battery is all larger than the permissible pressure value, then simultaneously to this
Multiple batteries execute low discharging current.
Embodiment according to the present invention, if battery equilibrium management method of the invention can comprise the following steps that the pressure difference again
Less than the permissible pressure value, then low discharging current is not executed to second battery.
Wherein, if the currently practical capacitance (SOC) of a battery is less than a certain capacitance, that is, stop execution low current and put
Electricity is effectively prevented from the battery and crosses low pressure and cause the battery permanent injury.
Furthermore it is noted that multiple battery battery core, when completely filling, the capacitance error allowed is smaller；It is multiple
For battery battery core in more low pressure, the capacitance error allowed is bigger.
In conclusion the battery equilibrium management method proposed according to the present invention, in addition to micro-control unit is in per unit
Time detects the voltage of all batteries in concatenated multiple batteries, and can detect the electricity in multiple batteries with minimum voltage
Pond, micro-control unit also can directly judge whether the pressure difference between the voltage of other batteries and the battery with minimum voltage is big
In the permissible pressure value (variate-value) of other batteries, and then reaches and decide whether that low discharging current should be executed, therefore, the present invention
Battery equilibrium management method can effectively extend service life of battery.
Although many illustrative embodimentss for having referred to the application describe embodiment, however, it should be noted that this field
Technical staff it is conceivable that various other changes and embodiment, these change and embodiment will fall into the spirit of disclosure principle with
In range.Especially, the disclosure, schema and it is appended apply for a patent within the scope of, to theme combine setting composition portion
Divide and/or setting can various changes can be made and modification.It, can in addition to the variation and modification made to component part and/or setting
The purposes of substitution will be apparent to those skilled in the art.
Claims (4)
1. a kind of battery equilibrium management method is suitable for concatenated multiple batteries, which comprises the following steps:
By a micro-control unit, the per unit time detects the voltage of all batteries in multiple battery, and it is more to detect this
With one first battery of minimum voltage in a battery；
By the micro-control unit and a Z-line linearity curve, a permissible pressure value of one second battery in multiple battery is obtained；
The micro-control unit judges that the pressure difference between the voltage of second battery and first battery with minimum voltage is
No permissible pressure value greater than second battery；
If the pressure difference is greater than the permissible pressure value, low discharging current is executed to second battery；And
Until the pressure difference be less than the permissible pressure value, then stop execute low discharging current,
Wherein, if the pressure difference of multiple batteries and first battery with minimum voltage in multiple battery is all larger than the permission
Pressure difference then executes low discharging current to multiple battery simultaneously.
2. battery equilibrium management method according to claim 1, which is characterized in that and the following steps are included: if pressure difference
Less than the permissible pressure value, then low discharging current is not executed to second battery.
3. battery equilibrium management method according to claim 1, which is characterized in that if the currently practical capacitance of a battery
(SOC) less than a certain capacitance, that is, stop executing low discharging current, the battery is avoided to cross low pressure and the battery is caused permanently to hurt
Evil.
4. battery equilibrium management method according to claim 1, which is characterized in that multiple battery battery core when completely filling,
The capacitance error allowed is smaller；For multiple battery battery core in more low pressure, the capacitance error allowed is bigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710914093.2A CN109599903A (en) | 2017-09-30 | 2017-09-30 | Battery equilibrium management method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710914093.2A CN109599903A (en) | 2017-09-30 | 2017-09-30 | Battery equilibrium management method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109599903A true CN109599903A (en) | 2019-04-09 |
Family
ID=65955736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710914093.2A Pending CN109599903A (en) | 2017-09-30 | 2017-09-30 | Battery equilibrium management method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110187325A1 (en) * | 2010-02-04 | 2011-08-04 | Po Chang Lin | System and method for balancing a battery pack |
| CN103178578A (en) * | 2011-12-22 | 2013-06-26 | 安德烈亚斯.斯蒂尔两合公司 | Debalancing protection circuit for a battery pack |
| CN103683377A (en) * | 2012-09-18 | 2014-03-26 | 铃木株式会社 | Battery pack balancing device |
| CN103855757A (en) * | 2012-11-29 | 2014-06-11 | 三星Sdi株式会社 | Apparatus for managing battery, and energy storage system |
| TWI520409B (en) * | 2014-12-29 | 2016-02-01 | 財團法人工業技術研究院 | Battery cell balancing device and balancing method thereof |
| CN106026260A (en) * | 2016-06-24 | 2016-10-12 | 南京航空航天大学 | SOC estimation method for series-wound battery pack having equalization circuit |
-
2017
- 2017-09-30 CN CN201710914093.2A patent/CN109599903A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110187325A1 (en) * | 2010-02-04 | 2011-08-04 | Po Chang Lin | System and method for balancing a battery pack |
| CN103178578A (en) * | 2011-12-22 | 2013-06-26 | 安德烈亚斯.斯蒂尔两合公司 | Debalancing protection circuit for a battery pack |
| CN103683377A (en) * | 2012-09-18 | 2014-03-26 | 铃木株式会社 | Battery pack balancing device |
| CN103855757A (en) * | 2012-11-29 | 2014-06-11 | 三星Sdi株式会社 | Apparatus for managing battery, and energy storage system |
| TWI520409B (en) * | 2014-12-29 | 2016-02-01 | 財團法人工業技術研究院 | Battery cell balancing device and balancing method thereof |
| CN106026260A (en) * | 2016-06-24 | 2016-10-12 | 南京航空航天大学 | SOC estimation method for series-wound battery pack having equalization circuit |
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Application publication date: 20190409 |