CN107785969A - The battery charge controller of high-voltage lithium ion battery group - Google Patents
The battery charge controller of high-voltage lithium ion battery group Download PDFInfo
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- CN107785969A CN107785969A CN201711268871.1A CN201711268871A CN107785969A CN 107785969 A CN107785969 A CN 107785969A CN 201711268871 A CN201711268871 A CN 201711268871A CN 107785969 A CN107785969 A CN 107785969A
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- voltage
- battery
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- lithium ion
- temperature
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 38
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 37
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 4
- 230000002159 abnormal effect Effects 0.000 claims description 15
- 239000000178 monomer Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 claims description 3
- 241000208340 Araliaceae Species 0.000 claims description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
- 235000008434 ginseng Nutrition 0.000 claims description 2
- 238000000034 method Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 208000031639 Chromosome Deletion Diseases 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- 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
-
- H02J7/0026—
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
- H02J7/007184—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage in response to battery voltage gradient
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- H02J7/0077—
-
- H02J7/0091—
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of battery charge controller of high-voltage lithium ion battery group, and for being charged to high-voltage lithium ion battery group, the battery pack includes at least two cells, including：Acquisition module, the voltage and/or temperature parameter of the cell for gathering the high-voltage lithium ion battery group；Judge module, the parameter obtained based on the acquisition module, judges that battery pack or cell whether there is electric voltage exception and/or temperature anomaly；Charge control module, based on the judged result of the judge module, the operation of charge rest or Discrete control charging is carried out to the high pressure lithium battery group.Control circuit that the device of the present invention needs is simple, charging is reliable, improves control accuracy, farthest prevents from overcharging and the problem of charge less.
Description
Technical field
The present invention relates to accumulator charging technology field, more particularly to the charging control of aircraft high-voltage lithium ion battery group
Device processed.
Background technology
Lithium-ions battery due to it is higher than energy, operating voltage is high, self-discharge rate is low, have extended cycle life, security is good etc.
Feature, space industry has been widely used in it.
Lithium-ions battery in use, need to strictly control charge-discharge magnification, prevent charge less and overcharge, and lithium ion stores
Battery charge less can influence power supply capacity and service life, and service life can not only be influenceed by overcharging, and potential safety hazard can be produced when serious,
Especially in high voltage power supply system, the security requirement to lithium-ions battery charge control is higher, it is therefore desirable to a kind of
Suitable for the rational safe and reliable charge control method of high pressure lithium-ions battery.
Traditional lithium ion charge control method uses constant current -- and constant pressure carries out charge control, in charging process, charging
Control circuit first carries out constant-current charge to lithium-ions battery, when accumulator battery voltage reaches setting value, is transferred to constant-voltage charge,
Charging current declines automatically, until stop charging, but for charging control circuit is more complicated, reliance security the drawbacks of this method
Property is relatively low.And existing lithium ion charge control method lacks the detection and control to charging process.
The content of the invention
The present invention solves the problems, such as to there is provided a kind of battery charge controller of high-voltage lithium ion battery group, device needs
Control circuit is simple, charging is reliable, improve control accuracy, farthest prevent from overcharging and the problem of charge less.
In order to solve the above problems, a kind of battery charge controller of high-voltage lithium ion battery group of the present invention, for high pressure
Li-ion batteries piles are charged, and the battery pack includes at least two cells, including：
Acquisition module, the voltage and/or temperature parameter of the cell for gathering the high-voltage lithium ion battery group；
Judge module, the parameter obtained based on the acquisition module, judges that battery pack or cell whether there is electric voltage exception
And/or temperature anomaly；
Charge control module, based on the judged result of the judge module, the high pressure lithium battery group is carried out charge rest or
The operation of Discrete control charging.
Alternatively, the time interval of the collection of the acquisition module is 300-700 milliseconds.
Alternatively, the time interval of the collection of the acquisition module is 500 milliseconds.
Alternatively, the magnitude of voltage V of each cell of the acquisition module collection battery packx, and based on each
The magnitude of voltage V of individual cellxObtain the voltage intermediate value V of cellavg, and the magnitude of voltage V of whole battery packxn；
The acquisition module gathers the temperature value T of at least two cells1,T2, and by the temperature of two cells
The average value T of valueavgTemperature value T as battery packxn。
Alternatively, the judge module includes：
Temperature judge module, the temperature judge module are used to be based on default reference temperature value, judge the temperature value of battery pack
It is whether abnormal, as the temperature T of the battery packxnWhen exceeding permission number more than or equal to the reference temperature value, battery pack is judged
In the presence of temperature abnormality；
Voltage judge module, the voltage judge module is used to judge that cell is abnormal with the presence or absence of overvoltage, when the monomer
The voltage V of batteryxDuring more than the permission number for referring to monomer voltage, there is overvoltage exception in the cell, and the voltage is sentenced
Disconnected module is additionally operable to judge battery voltage VxnWhether battery pack target voltage is more than or equal to.
Alternatively, the scope of the default reference temperature value is 44 degrees Celsius to 46 degrees Celsius；The default voltage
Reference range is 4.4 volts to 4.5 volts, and the permission number is 8-12 times.
Alternatively, number n of the battery pack target voltage based on cell, the load voltage value V of celle、
The permission voltage difference V of celltCalculate, it is allowed to which voltage difference Vt scope is 100-250mV, the permission magnitude of voltage
For：n*(Ve ±Vt)。
Alternatively, the charge rest is temporary termination；
When battery pack temperature exception, charge control module controls whole battery pack to stop charging, until the temperature judges mould
Block judges that battery pack temperature is no longer abnormal, and whole battery pack is reentered state to be charged by charge control module；
When cell, overvoltage to be present abnormal, and charge control module controls the cell to stop charging, other monomers battery after
Continue charging and acquisition module, judge module and charge control module work on, until monomer battery voltage is no longer abnormal；
When voltage judge module judges battery voltage VxnWhether (V is more than or equal toe±Vt) when, or wherein one or more lists
When the voltage of body battery reaches battery cell target voltage, the current value of the cell to charging is reduced several times.
Alternatively, it is described to reduce to the current value of the cell to charge to divide 3 times, when voltage judge module is sentenced
Disconnected battery voltage VxnIt is more than or equal to (V for the first timee±Vt) when, or the voltage first time of wherein one or more cells
When reaching battery cell target voltage, the k that charging current is electric current when starting to charge up is reduced1Times, K1Numerical value between 0-1；
When voltage judge module judges battery voltage VxnIt is more than or equal to (V for the second timee±Vt) when, or wherein one or more monomers
When the voltage of battery reaches battery cell target voltage for the second time, the k that charging current is electric current when starting to charge up is reduced2Times, k2
Numerical value between 0-1, and K2Less than K1, when voltage judge module judges battery voltage VxnThird time is more than or equal to (Ve
±Vt) when, or voltage third time when reaching battery cell target voltage of wherein one or more cells, reduce charging electricity
Flow for 0.
Alternatively, the K1Scope is 0.1-0.25, the K2Scope is 0.01-0.0625.
Compared with prior art, the present invention has advantages below：
Temperature of the battery charge controller of high-voltage lithium ion battery group of the present invention in charging process to cell, electricity
Pressure is detected, and overheat protector and/or overvoltage protection are carried out based on temperature, the result of voltage detecting；And utilize segmented side
Formula is charged, mutually in requisition for control circuit it is simple, reliable charging of charging is reliable, improves control accuracy, farthest
Prevent and overcharge and the problem of charge less.
Brief description of the drawings
Fig. 1 is the structural representation of the battery charge controller of the high-voltage lithium ion battery group of one embodiment of the invention.
Embodiment
Prior art uses constant current to lithium-ions battery -- and constant pressure carries out charge control, is charging control the drawbacks of this method
Circuit processed is more complicated, reliance security is relatively low.And existing lithium ion charge control method lacks to charging process
Detection and control.
In order to solve the above problems, the present invention provides a kind of battery charge controller of high-voltage lithium ion battery group, the electricity
Pond group includes at least two cells.Fig. 1 is refer to, Fig. 1 is the high-voltage lithium ion battery group of one embodiment of the invention
The structural representation of battery charge controller.The battery charge controller includes：Acquisition module, for gathering the high pressure lithium ion
The voltage and/or temperature parameter of the cell of battery pack；Judge module, the parameter obtained based on the acquisition module, judge
Battery pack or cell whether there is electric voltage exception and/or temperature anomaly；Charge control module, based on the judge module
Judged result, the operation of charge rest or Discrete control charging is carried out to the high pressure lithium battery group.
Technical scheme is described in detail with reference to specific embodiment.The acquisition module collection
The magnitude of voltage V of each cell of battery packx, and the magnitude of voltage V based on each cellxObtain cell
Voltage intermediate value Vavg, and the magnitude of voltage V of whole battery packxn.The acquisition module gathers the temperature of at least two cells
Value T1,T2, and by the average value T of the temperature value of two cellsavgTemperature value T as battery packxn.The collection
The effect of module is to carry out parameter acquisition and monitoring to the state of cell and battery pack, is easy to battery charge controller to be based on
The state of cell or battery pack is controlled accordingly.It is to be directed to each list during the acquisition module collection voltages value
The voltage of body battery is acquired, and temperature acquisition is that the part in whole cells is acquired, by partial monosomy electricity
Temperature of the average value in pond as battery pack, is in order at the consideration of cost control, in other examples, temperature collect module
It can also set and the temperature of each cell is acquired, the temperature acquisition point on each cell can also have
It is multiple；The temperature data collected can take the method averaged to go to obtain the temperature of battery pack, can also be by collection
Temperature data carries out the method for intermediate value to obtain the temperature of battery pack, and those skilled in the art can be set as needed
It is fixed.
In order to obtain the effect of preferable parameter acquisition, as one embodiment, the time of the collection of the acquisition module
At intervals of 300-700 milliseconds.More preferably, the time interval of the collection of the acquisition module is 500 milliseconds.
The effect of the disconnected module is the data obtained based on acquisition module, is analyzed and is judged, judges cell
Either battery pack whether there is temperature anomaly or electric voltage exception, and to temperature judge module in normal charging process, it is described
Temperature judge module is used to be based on default reference temperature value, judges whether the temperature value of battery pack is abnormal, when the battery pack
Temperature TxnMore than or equal to the reference temperature value, judge that battery pack had a temperature abnormality, in the present embodiment, the default ginseng
The scope for examining temperature value is 44 degrees Celsius to 46 degrees Celsius, for example the default reference temperature is 42 degrees Celsius, works as battery pack
Temperature is more than or equal to 42 degrees Celsius, and more than number more than 10 times, then it is different to decide that battery pack has temperature for temperature judge module
Often, it may be necessary to the overheat protector measure under temperature anomaly pattern.
Voltage judge module is used to judge that cell is abnormal with the presence or absence of overvoltage, as the voltage V of the cellxGreatly
When the permission number of monomer voltage reference value, there is overvoltage exception in the cell, and the voltage judge module is additionally operable to
Judge battery voltage VxnWhether battery pack target voltage is more than or equal to.Pass through voltage judge module, it can be determined that monomer electricity
Pressure whether there is overpressure problems, and the level and the level of target voltage of the charging voltage of whole battery pack, and then after decision
It is continuous whether cell to be carried out stopping the charging method of charging or the battery pack to charging using Discrete control.
As one embodiment, the reference voltage level is 4.4V to 4.5V, and the permission number is 8-12 times.
Number n of the battery pack target voltage based on cell, the load voltage value V of celle, cell
Permission voltage difference VtCalculate, it is allowed to voltage difference VtScope be 100-250mV, it is described permission magnitude of voltage be：n*(Ve ±
Vt)。
The present invention is temporary termination to the charge rest of cell.
Specifically：When battery pack temperature exception, charge control module controls whole battery pack to stop charging, until institute
State temperature judge module and judge that battery pack temperature is no longer abnormal, whole battery pack is reentered shape to be charged by charge control module
State；
When cell, overvoltage to be present abnormal, and charge control module controls the cell to stop charging, other monomers battery after
Continue charging and acquisition module, judge module and charge control module work on, until monomer battery voltage is no longer abnormal；
When voltage judge module judges battery voltage VxnWhether (V is more than or equal toe±Vt) when, or wherein one or more lists
When the voltage of body battery reaches battery pack target voltage, the current value of the cell to charging is reduced several times.
Above-mentioned gradation is reduced to the current value of the cell to charge to divide 3 times, when voltage judge module judges electricity
Pond group voltage VxnIt is more than or equal to (V for the first timee±Vt) when, or wherein one or more cells voltage for the first time reach
During battery cell target voltage, the k that charging current is electric current when starting to charge up is reduced1Times, K1Numerical value between 0-1；Work as electricity
Pressure judge module judges battery voltage VxnIt is more than or equal to (V for the second timee±Vt) when, or wherein one or more cells
Voltage when reaching battery cell target voltage for the second time, reduce the k that charging current is electric current when starting to charge up2Times, k2Number
Value is between 0-1, and K2Less than K1, when voltage judge module judges battery voltage VxnThird time is more than or equal to (Ve±Vt)
When, or voltage third time when reaching battery cell target voltage of wherein one or more cells, reducing charging current is
0.Overvoltage/excess temperature can be prevented by the way of several times, and control circuit is simple, and control accuracy is high.As an implementation
Example, the K1Scope is 0.1-0.25, the K2Scope is 0.01-0.0625.
To sum up, the battery charge controller of high-voltage lithium ion battery group of the present invention in charging process to cell
Temperature, voltage detected, overheat protector and/or overvoltage protection are carried out based on temperature, the result of voltage detecting；And utilize
Segmented mode is charged, mutually in requisition for control circuit it is simple, reliable charging of charging is reliable, improves control accuracy, most
Prevent to big degree and overcharge and the problem of charge less.
Therefore, the technical concepts and features of above-mentioned preferred embodiment only to illustrate the invention, its object is to allow be familiar with this
The personage of item technology can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all
The equivalent change or modification made according to spirit of the invention, it should all be included within the scope of the present invention.
Claims (10)
1. a kind of battery charge controller of high-voltage lithium ion battery group, described for being charged to high-voltage lithium ion battery group
Battery pack includes at least two cells, it is characterised in that including：
Acquisition module, the voltage and/or temperature parameter of the cell for gathering the high-voltage lithium ion battery group；
Judge module, the parameter obtained based on the acquisition module, judges that battery pack or cell whether there is electric voltage exception
And/or temperature anomaly；
Charge control module, based on the judged result of the judge module, the high pressure lithium battery group is carried out charge rest or
The operation of Discrete control charging.
2. the battery charge controller of high-voltage lithium ion battery group as claimed in claim 1, it is characterised in that the acquisition module
The time interval of collection be 300-700 milliseconds.
3. the battery charge controller of high-voltage lithium ion battery group as claimed in claim 2, it is characterised in that the acquisition module
Collection time interval be 500 milliseconds.
4. the battery charge controller of high-voltage lithium ion battery group as claimed in claim 1, it is characterised in that the acquisition module
Gather the magnitude of voltage V of each cell of battery packxAnd the magnitude of voltage V of whole battery packxn；
The acquisition module gathers the temperature value T of at least two cells1,T2, and by the temperature value of two cells
Average value TavTemperature value Ts of the g as battery packxn。
5. the battery charge controller of high-voltage lithium ion battery group as claimed in claim 4, it is characterised in that
The judge module includes：
Temperature judge module, the temperature judge module are used to be based on default reference temperature value, judge the temperature value of battery pack
It is whether abnormal, as the temperature T of the battery packxnWhen exceeding permission number more than or equal to the reference temperature value, battery pack is judged
In the presence of temperature abnormality；
Voltage judge module, the voltage judge module is used to judge that cell is abnormal with the presence or absence of overvoltage, when the monomer
The voltage V of batteryxWhen exceeding permission number more than reference voltage level, there is overvoltage exception in the cell, and the voltage is sentenced
Disconnected module is additionally operable to judge battery voltage VxnWhether battery pack target voltage is more than or equal to.
6. the battery charge controller of high-voltage lithium ion battery group as claimed in claim 5, it is characterised in that the default ginseng
The scope for examining temperature value is that 44 degrees Celsius to the 46 degrees Celsius default voltage reference value scopes are 4.4 volts to 4.5 volts, described
It is 8-12 times to allow number.
7. the battery charge controller of high-voltage lithium ion battery group as claimed in claim 5, it is characterised in that the battery pack mesh
Mark number n of the voltage based on cell, the load voltage value V of celle, cell permission voltage difference VtCalculate,
Allow voltage difference VtScope be 100-250mV, it is described permission magnitude of voltage be：n*(Ve ±Vt)。
8. the battery charge controller of high-voltage lithium ion battery group as claimed in claim 5, it is characterised in that the charge rest
For temporary termination；
When battery pack temperature exception, charge control module controls whole battery pack to stop charging, until the temperature judges mould
Block judges that battery pack temperature is no longer abnormal, and whole battery pack is reentered state to be charged by charge control module；
When cell, overvoltage to be present abnormal, and charge control module controls the cell to stop charging, other monomers battery after
Continue charging and acquisition module, judge module and charge control module work on, until monomer battery voltage is no longer abnormal；
When voltage judge module judges battery voltage VxnWhether (V is more than or equal toe±Vt) when, or wherein one or more lists
When the voltage of body battery reaches battery cell target voltage, the current value of the cell to charging is reduced several times.
9. the battery charge controller of high-voltage lithium ion battery group as claimed in claim 8, it is characterised in that the reduction pair
The current value of the cell to charge is divides 3 times, when voltage judge module judges battery voltage VxnFor the first time be more than or
Equal to (Ve±Vt) when, or the voltage for the first time when reaching battery cell target voltage of wherein one or more cells, reduce
Charging current is k1 times of electric current when starting to charge up, and K1 numerical value is between 0-1；When voltage judge module judges battery pack electricity
Press VxnIt is more than or equal to (V for the second timee±Vt) when, or the voltage of wherein one or more cells reaches battery list for the second time
During body target voltage, reduction charging current is k2 times of electric current when starting to charge up, and k2 numerical value is between 0-1, and K2 is less than
K1, when voltage judge module judges battery voltage VxnThird time is more than or equal to (Ve±Vt) when, or wherein one or more
When the voltage third time of cell reaches battery cell target voltage, it is 0 to reduce charging current.
10. the battery charge controller of high-voltage lithium ion battery group as claimed in claim 8, it is characterised in that the K1 scopes
For 0.1-0.25, the K2 scopes are 0.01-0.0625.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711268871.1A CN107785969A (en) | 2017-12-05 | 2017-12-05 | The battery charge controller of high-voltage lithium ion battery group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711268871.1A CN107785969A (en) | 2017-12-05 | 2017-12-05 | The battery charge controller of high-voltage lithium ion battery group |
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| Publication Number | Publication Date |
|---|---|
| CN107785969A true CN107785969A (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711268871.1A Pending CN107785969A (en) | 2017-12-05 | 2017-12-05 | The battery charge controller of high-voltage lithium ion battery group |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729790A (en) * | 2019-10-28 | 2020-01-24 | Oppo广东移动通信有限公司 | Charging method and device, computer equipment and storage medium |
| CN111082488A (en) * | 2019-12-26 | 2020-04-28 | 安徽六和同心风能设备有限公司 | Lithium battery voltage balance protection system |
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| US3624837A (en) * | 1968-03-16 | 1971-11-30 | Philips Corp | MOTOR SPEED AND TORQUE CONTROL CIRCUIT WITH e.m.f. FEEDBACK |
| CN101969214A (en) * | 2010-10-09 | 2011-02-09 | 华为技术有限公司 | Battery pack and control method thereof |
| CN106602626A (en) * | 2015-10-20 | 2017-04-26 | 苏州宝时得电动工具有限公司 | Method and system for processing battery data |
-
2017
- 2017-12-05 CN CN201711268871.1A patent/CN107785969A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3624837A (en) * | 1968-03-16 | 1971-11-30 | Philips Corp | MOTOR SPEED AND TORQUE CONTROL CIRCUIT WITH e.m.f. FEEDBACK |
| CN101969214A (en) * | 2010-10-09 | 2011-02-09 | 华为技术有限公司 | Battery pack and control method thereof |
| CN106602626A (en) * | 2015-10-20 | 2017-04-26 | 苏州宝时得电动工具有限公司 | Method and system for processing battery data |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729790A (en) * | 2019-10-28 | 2020-01-24 | Oppo广东移动通信有限公司 | Charging method and device, computer equipment and storage medium |
| CN111082488A (en) * | 2019-12-26 | 2020-04-28 | 安徽六和同心风能设备有限公司 | Lithium battery voltage balance protection system |
| CN111082488B (en) * | 2019-12-26 | 2021-09-28 | 安徽六和同心风能设备有限公司 | Lithium battery voltage balance protection system |
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Application publication date: 20180309 |